Movable conveyor used in grain purchase work

DY series removable belt Product Overview: DY series portable belt conveyor is a kind of high efficiency, resistance to use, good mobility continuous conveyor handling

equipment. Mainly used for loading and unloading sites change frequently moving places, such as: ports, terminals, stations, coal yards, warehouses, construction

Building site, sand quarry, farm, etc., used short-distance transport and handling of bulk materials or single-piece weight 100 kg or less of items. DY-type mobile elevating

belt conveyor type and non-classified into two categories lift, run by electric drum conveyor drives, machine lifting and running

Are non-motorized. DY series movable belt conveyor for bulk materials or items of short-distance transport and handling. Used in the steel structure, light and beautiful, good Flexible Roller Conveyor

mobility. Rotating device for electric drum, and is equipped with pneumatic tires and steel wheels two kinds of walking round. Captain 10 m

Above angle adjustable. DY series movable belt conveyor main features: DY series portable belt conveyor performance and main technical parameters and Germany Forand and Thyssen

company's products rather, the main feature is the use of high-precision, hard face gear with its high carrying capacity, (than the soft

Increased 2-3 times with mask round); long life (up to 10 years); structure poly compact, small footprint (can be reduced more than 50%); when light weight, small size (50%

lower); especially Vertical transmission structure, is more suitable for coal mine mining transportation machinery used.Gravity roller conveyor

Classification of bulk material handling machinery and Uses

(A) by a conveyor belt tensioning device drives the central structure and composition of the roller conveyor as towing and carrying member, so as to continuously fed into pieces

scattered and fragmentary materials or goods.
    Friction drive conveyor is a continuous manner for material transport machinery. Apply it, the material can be transported in a certain line, the feed point from the initial

to the final discharge point between the formation of a material transfer processes. It can be granular material conveyor can also be

For a delivery of items. In addition to the purely material handling, but also with various industrial enterprises in the production process requirements matching process, the drag chain conveyor

formation of the rhythmic flow transport line. So conveyor is widely used in a variety of modern industrial enterprises.
    In the underground mine workings, mine ground transportation systems, open pit and processing plant, widely applied conveyor. It is used for horizontal transport or inclined

transportation.
    Universal conveyor from the conveyor belt, roller, roller and the drive, brakes, tension, bend, loading, unloading, cleaning and other equipment components.
    ① conveyor
    Commonly used with two kinds of rubber bands and plastic. Rubber band for working environment temperature -15 ~ 40 ° C between. Material temperature does not exceed 50 °

C. Upward transport of Granules inclination 12 ° ~ 24 °. Available for large transmission angle tread rubber band. Plastic belt with oil, acid,

Alkali, etc., but for the poor adaptability to climate, slippery and aging. Bandwidth is the main technical parameters of belt conveyor.
    ② roller
    Of single drum (tape on the drum wrap angle of 210 ° ~ 230 °), double drum (wrap angle of 350 °) and multi-cylinder (for power) and so on. There trough roller, flat-

shaped roller, spherical roller, buffer roller. Trough roller (2 to 5 by the roller composition) supporting bearing branches

For conveying granular materials; aligning roller to adjust the lateral position with, to avoid deviation; buffer roller mounted in place by the material in order to reduce the

impact of material on the belt.roller chain conveyor
    ③ drum
    Minute drive rollers and bend pulley. Drive rollers are main components of power transmission. Of single drum (tape on the drum wrap angle of 210 ° ~ 230 °), double drum

(wrap angle of 350 °) and multi-cylinder (for power) and so on.
    ④ tensioning device
    Its role is to achieve the necessary belt tension, in order to avoid slipping on the drive roller, and to the conveyor belt between the deflection rollers ensure that the

required range.
    Belt conveyor technical advantages:
    The first is the conveyor reliable operation. Require continuous operation in many important production units, such as the transport of coal power plants, steel mills and

cement conveying bulk materials, as well as loading and unloading of ships in ports all adopts belt conveyor. On these occasions, such as downtime, the loss

Is huge. If necessary, take a class to a group of belt conveyor can work continuously.
    Conveyor low power consumption. As the material almost no relative movement of the conveyor belt, not only the running resistance (about 1/3-1/5 scraper conveyor), but also

the wear and broken cargo are small, high productivity. These are conducive to lower production costs.
    Conveyor belt conveyor line adaptable and flexible. Line length according to need. Short as a few meters, length up to 10km or more. Can be installed in a small tunnel,

ground transportation can also be set up in the region over the chaos and danger.
    According to process requirements, can be very flexible belt from one or more points by the material. Also provide multiple discharge points or several sections. While

simultaneously at several points on the feeding conveyor (such as the Coal bunker conveyor) or along the length direction of the belt at any point

By uniformly feeding equipment to feed conveyor, the belt has become a major transport route.
    Coal stockpile conveyor can stockpile reclaimer roadway below, when necessary, but also to the heap of different materials are mixed. Materials may be simply discharged from

the conveyor head, but also by moving plow unloader or unloading vehicle longitudinal direction of the belt at any point discharge.
    (2) commonly known as the auger screw conveyor is suitable for granular or powdered materials horizontal conveyor, inclined conveyor, vertical transportation and other

forms. Transmission distance varies according to deformity, usually from 2 meters to 70 meters.
    Conveying principle: rotating spiral blade for screw conveyor passage of the material transported. So that the material does not rotate together with the screw conveyor

blades is the material force of its own weight and the frictional resistance of the material conveyor chassis.
    Features: Screw rotating shaft is welded spiral blades, blade face delivery of materials based on a solid surface different type, belt type face, leaves and other types of

face. Screw conveyor screw axis in the direction of movement of the material with the thrust bearing to the terminal with the material to spiral

Axial reaction force, the captain longer, should be added to intermediate hanger bearings.
    Two screw conveyor is to have two rotating blades were welded with the rotary shaft screw conveyor. To put it plainly, is to two conveyor organic combination, consisting of

a screw conveyor.
    Screw rotation axis of rotation, determines the conveying direction of the material, but generally in the design of the screw conveyor are transported in accordance with the

individual blades of rotation. When the reverse transport, it will greatly reduce the service life of the conveyor.
    (3) bucket elevator: the use of uniform traction member fixedly connected to the endless series of hoppers, vertical continuous upgrading of materials handling machinery.
    Bucket elevator with transmission capacity, high hoisting height, stable and reliable, long life and significant advantages, its main properties and parameters in line with

JB3926 ---- 85 "vertical bucket elevator" (with reference to the standard equivalent to international standards and foreign advanced standards), traction ring

Chain compliance MT36 ---- 80 "high-intensity ring chain mine," the elevator for conveying powder, granular and small block of non-abrasive and abrasive small materials, such

as: coal, cement , stone, sand, clay, ore, etc., because the traction hoist ring chain is due to

This allows the delivery of high temperature materials (material temperature does not exceed 250 ℃). General transport height of up to 40 meters.

Inverter applications in transportation machinery

Conveyor chain can be divided into the Dabie conveyor belt, belt conveyor, spiral conveyor, roller conveyors, vibrating conveyors, bucket conveyors, etc.; depending on the

haulage of the physical properties of objects, chemical properties, shape and size of the shape transport path, handling methods and the results or demand

Different, in the selection, should function, characteristics, economic considerations, etc., which selected the most appropriate conveyor.
But in addition to these suits, today's production line has been gradually factory automation and conveying requirements to be able to automatically and effort. This

responsibility is a natural addition to the special variable speed drive of the conveyor according to variable speed-oriented approach is traditional also had mechanical rubber belt conveyor

stepless speed change and the

Kind of variable speed electric type, but the choice of having a controlling, maintenance and economical way of superb inverter drive, increasing.
   The advantage of inverter drives
   One can take advantage of squirrel cage induction motor: This type motor body is small, you can not like a mechanical gearbox transmission portion of space, the drive can be

shaped small and light; Any further transmission device is attached, the multiplier effect. No brushes or commutator, and thus the base almost maintenance-free.Incline Belt conveyor
2 can be set using only the electric motor, in both the circuit design can be inserted into the drive speed of the conveyor must, of transformed for the stepless speed change.
3. Improve production performance: Using inverter drive that wide range of 1:10 to 1:20 speed control is the remote control to change the number of instruction cycles will be

able to do it so easy to choose the most suitable job requires speed, particularly with the use of a vector control conversion mode, you can reach 1:100 speed control

System range, with as much as the PG speed control range 1:1000 optional operation.
4 can be submissive to start and stop: Conveyor speed as affected by rapid speed, the subject matter will be sent crashing down, for example, glass suddenly stopped moving, then

the bottle and the bottle collide, could result in damage; provided that if the inverter operation, Because it was a low frequency to start, so that the shock is small, and then

by

Supple manipulation adjust the setting time is really smooth and supple to change the speed, the whole can secure wishful helps product safety, to ensure quality.
5 able to function frequently, stop and reverse:
a. Inverter Frequency domain and from a low voltage starting, slowly rising Frequency and voltage values, so compared to the commercial power directly starter starter good

efficiency, the current small starting torque produced results motor heat, get over frequent starting, stopping and harmless
b. forward or reverse is controlled by the inverter transistor switching phase rotating derived. this way than the previous phase of the main circuit by way of switching wires,

there is no part of the movable portion and the friction, heat will be less more, so you can come back to use as horizontal as frequently anti-clockwise

Conveying transfer.
6 may be electrically braking deceleration when the supply frequency of the motor output will slowly decrease, the motor speed will exceed the synchronous speed situations.

Occurs in this state, the energy recovery motor is inverter DC power source unit of the capacitor Absorption (DC hypertension); when it

Up to a certain standard, the transistor will be automatically opened and closed and the discharge of the electrical energy it consumes part of the resistor so that the

rotational energy to the load through the motor regenerative role for the generator is converted to electrical energy conversion drive-in resistors is the thermal energy which

is consumed by the regenerative system

Action.
Without using the resistor, the motor may still have internal losses of 20% of the level of braking force. Conveyor is generally constant torque load, so as not necessary rapid

deceleration, then no need to set many situations since the braking resistor For less frequent occasions brake, then also a self-

High-speed flow of DC current to the motor way and achieve the target braking force; known as dynamic braking.
Electrical brake (braking) advantages can stop at the specified location, even if the motor is running at high speed; also can make it from low speed to quickly reach the kind

of creeping crawling like amble speed and shorten the work cycle time operation frequency to change the motor speed

Climb, then this electric brakes with produce, hand in hand, do not have to operate under the guise of manpower, especially conveyor conveying the shape stake amount, when it

incurred a negative torque motor-ridden, the electrical braking action to prevent the motor on That could happen dramatically speed up the hazards

.
7 easy to change the speed
As long as the motor frequency increase supply, conveyor speed is increased; For existing transportation equipment, but also to increase their levels of 10 to 20% transmission

capacity is simple and easy to do. Should pay attention to is the need to have surplus capacity of the motor and the need to comply with "no more than the gear capacity

Xu number of revolutions as the constraint conditions. "

Belt Conveyor Safety practices

Technical operation safety belt conveyor
First, the general requirements
Article 1 of the type of work must be professional and safety, technical training, examination, operation qualification certificate obtained only after the certificates.
The first two positions are familiar belt conveyor working principle, construction, performance, technical features, parts of the name and role, motors, control equipment and

related electrical performance based on knowledge, understanding some of the common causes of accidents and preventive measures .
The first three are familiar with the device open positions, parking procedures and methods of operation, and contact signals to the station, as well as inspection, analysis,

prevention and troubleshooting methods.belt conveyor manufacturer
Section 4 strictly enforce the "Coal Safety Regulations", technical procedures, personal responsibility, shift system and other relevant regulations.
Section 5, induction time, dressed according to the provisions concerning labor protection.
Second, security requirements
Article 6 of belt conveyor nose, tail must set the security guards or railings. Under extraordinary place in the machine, you must set the security protection board. If the

conveyor length exceeds 30m, you must set the pedestrian bridge.
Section 7 belt length exceeds 50m, each key work place must be set between "emergency stop" button or pull switch. "Emergency Stop" button or pull the switch setting position,

should generally be in the corridor side of the sidewalk.
Article 8 must be set to prevent migraine inclined belt conveyors, non-return and overload, anti-skid shutdown protection devices.
Article 9 must be set belt cleaner. Conveyor running process, the prohibition clean or replace rollers, prohibit clean coal storage racks and rollers prohibit standing rack

shovel coal, sweeping water, touch belt. Higher belt rack, you must set protective shutters.

Cleaning roller, nose, tail drum must be executed when the system outage listed.
Article 10 prohibits any person stand on the conveyor belt, walking, sitting, lying across. Prohibit the use of belt conveyor handling tools or other objects.
Article 11 prohibits the drum sprinkle coal, sand, litter bags and other debris. Prohibits forced to start conveyor overload. Prohibited in the operation area of ​​the coal used

scraper roller method of offset.Plastic belt conveyor
Third, the preparation before work
Article 12 on "Coal Electrical Equipment Inspection Law" requires a general inspection of the equipment, the need to make the following checks:
① understand the coal bunker loading conditions and check the flap, the gate should be flexible and easy to use.
② feeding, nesting chute should be smooth, without damage to the deformation.
③ entire block of coal leather (bezel), unloader, cleaner should be complete, solid well without excessive wear and tear.
④ each roller, gear roller, pressure roller, etc. should be complete and intact.
⑤ should heap of coal around the drum, or other objects obstruct operation.
⑥ there should be no load on the tape, belt conveyors shall remain unloaded start.
⑦ bearings, gear box and the friction parts should be well lubricated.
Fourth, the normal operating requirements
Article 13 Upon hearing the centralized control drive signal, it will switch to a centralized control to a location in the vicinity of the start switch monitors the belt starts

situation when abnormal situations, press the emergency stop button, when returned to normal, the need for timely transfer switch fight to the centralized control position.
Article 14, such as when driving in place, should be connected to drive signal to confirm checks out, the next process to be run after the device before driving; after driving

belt conveyor should run a few weeks, no abnormal phenomenon only when feeding.
Article 15 checks whether the deviation or edging tape phenomenon, discovered to observe analyze the causes and timely reporting for processing. .
Article 16 to observe the distribution of material on the tape, with or without skew and other feeding inequality, to timely adjust.
Article 17 of the belt conveyor is running, prohibit clean nose, tail and around the area of ​​the drum coal.
Article 18 prohibits cleaning during operation of the transmission belt conveyor belt, machine parts and authentic surface float coal dust and grease, if necessary, stop

processing.
Fifth, the special circumstances of the deal
Section 19 found unloading chute plug, iron, and other debris stuck tape in time when to stop treatment.
Article 20 running the following conditions, should immediately stop processing: open plastic tape joints pull off or tear; belt run seriously, there is scratched, torn danger.
Article 21 during the operation in case of emergency should pull the emergency pull switch.
Article 22 during the operation, when found next process shutdown, you must immediately stop, to be processed to identify the reasons start normally, then boot.
Article 23 warehousing belt drivers should always measure inventory, and timely reporting to coordinate directed production.
Sixth, the work operation
Section 24 in place when driving, received a stop signal and after the device when no material before pressing the stop button to stop.
Article 25 sets control when driving by the Centralized Traffic Control Parking.
Article 26 regional health work should shift before clean up various items neatly stacked.
Article 27 should shift in the field, who explained in detail to the succession clear bumban belt conveyor operating conditions, failures and problems, fulfill all formalities

shift, before the handover.

Belt conveyor operation maintenance and installation

   
First, the startup and shutdown
    Conveyors should be used when you can start latching means for control room through a certain order to start and stop. In addition, in order to prevent incidents, each

conveyor should be set in place to start or stop buttons can be individually stopped Renyiyitai. In order to prevent transmission

With some reason is longitudinally torn, when the conveyor is longer than 30m, the length along the conveyor, should be spaced a certain distance (e.g. 25-30m) to install a stop

button.
Second, depending on the maintenance of belt conveyors
    To ensure reliable operation of belt conveyor, the most important is to find and eliminate possible failures. Driver must always observe this operation work of transport, hot water heat exchanger

such as abnormal should timely manner. Mechanical workers should be regularly inspected and examine any situation need to pay attention

Conditions or parts, which is very important. For example, a roller, does not seem very important, but a high-speed conveyor belt worn materials may soon put its shell worn out,

the emergence of a blade, the blade could seriously damage an expensive belt. Trained

Workers or experienced staff to discover imminent accident and take preventive measures.
    Belt conveyor belt conveyor costs in the entire account for a large proportion. In order to reduce the cost of replacement and repair belt, must pay attention to the

operator and maintenance personnel for the operation and maintenance of conveyor knowledge training.
   
Fault content
 Reasons (as may occur in the order)air to water heat exchanger
1 - conveyor belt bending - Avoid the conveyor roll into a pyramid or stored in damp places. A new belt should be straight after the access, otherwise it should be replaced.
2 - conveyor belt splicing incorrect or improper clamp - Use the correct card in, in operation a short time before chucking again. If the stitching is not correct, it is

necessary to remove the belt connector, do a new connector. Establish a regular inspection system.
3 - Conveyor speed is too fast - lower conveyor speed.
4 - conveyor belt at the side of wry - access to new belt. If access is not correct or conveyor belt is not new, it is necessary to remove twisted part, and access to a new

belt.
5 - buffer strips lining omission or improper - can not be used, fitted with an appropriate buffer strip lining belt.
6 - Counterweight too - need to recalculate and adjust the weight of the counterweight, the string tight force decreased to slip point, and then slightly taut.
7 - Counterweight too light - re-calculate the required weight and adjusts the counterweight or screw tensioning device.
8 - due to abrasion, acids, chemicals, heat, mold, oil and damage - using the conveyor belt used for the special conditions. Frayed or grinding abrasive materials into the

fabric layer, fill with cold or permanent repair. Or use a metal clamp stepped vulcanized joints instead. Enclosed conveyor operating line

Prevent rain or the sun, do not over lubricate rollers.
9 - double drum drive at different speeds - make the necessary adjustments.
10 - conveyor transfer capacity is insufficient - to recalculate the maximum tension and choosing the right conveyor belt conveyor belt. If the system is extended too long, you

should consider using the two-stage system with a functioning station. If the belt core stiffness is poor, not enough to support the load was not working properly, replace

With appropriate flexibility Conveyors.

Scraper conveyor installation and use

 
    Scraper conveyor installation requires the following tasks:
A) positioning
    First, set the location of the nose and tail, and then set the scraper conveyor centerline.
2) laying the middle slot
    According fix conveyor centerline, laying the middle slot. Such as non-metallic groove box, then the middle slot tiling and cement slab, and then bonded cast stone lining.

Cast stone laying liner, pay attention straight seams as little as possible, to stagger the longitudinal slit to prevent the gap mill work

Into a ditch.heat exchange manufacturers
    Conveyor need laying flat surface, such as a conveyor plane excessive bending, will inevitably lead to two chain discontinuity, cast stone acceleration chain and wear

between the tank wall, and even card chain. Paragraphs should be smooth and no overlap tank level. As the tank itself, structural constraints, in neighboring

Deflection in the vertical direction between the tank should not be too large. If the conveyor is not laying flat, transport consumption will increase. Road to the plot machine

coal or debris should be swept away.
3) Install the nose and tail
    Nose and tail should leave some space, easy maintenance and repair. Sprocket centerline to centerline perpendicular to the conveyor and assurance level.
4) mounted scraper chain
    Before installing scraper chain, should be pre-connected, scraper evenly distributed in the chain. If the two chains of equal length to choose, or factory assembled chain

pairing. Chains may not have reverse phenomenon. Ring chain seam side up, to prevent the occurrence of chain and sprocket grip

Phenomenon.automated sorting machine
5) Inspection and air operation
    Conveyors installed, should be thoroughly checked and start conveyor. Empty running 2h, mainly the driving device and the blade is functioning properly. Meanwhile, the

intermediate grooves of adjacent abutting again tension chain, the chain length adjustment.
    Scraper conveyor work within the first two weeks, you should pay particular attention to the tightness of the chain. Checking method is this: If there is a tail drive, then

jog the drive device, when the tail sprocket chain on stocks with more than two full relaxation chain link, the need to tighten chain or split ring chain reduction,

Reduce the length of chain link. If only the head driving device, you will need to reverse the motor jog, while stocks on the nose sprocket chain at more than two chain rings

completely relaxed. Also need to tighten chain or split ring chain reduction.

Hoist safety rules

Hoist safety rules:
1 Keep hoist and surroundings clean.
2 hoist two uprights oil chamber, gear box oil to be injected or 50 # oil, lubricants height of not less than noodles, oil replaced once every three months. Two pillars of the

upper and trolley wheel shaft raceways, the injection of calcium-based grease gun with grease, injected once per week.
3 operation, the four prongs should select the appropriate center of gravity position, locking security bit holder, and then turn the four rubber tray, respectively, so that the Metal Detector

surface of the support plate and posts together closely to enhance the physical, ie "up" push-button l 250m/m- 300m / m, look at what instability, if stability can work.
4 in strict accordance with the provisions to enhance the machine for work, according to the rules regularly filling oil, grease, extended equipment life.
5 Do not overload hoist use or generate overturning moment, use shall not exceed the load.
Drive screw nut with wear look safe location, if you press close "NO" position, you must exchange a new nut. The hoist safety assurance mechanism set up by the guarantee

institution automatic stopping place, at this time, you must exchange a new nut, before normal operation.Screw conveyor

Mine hoist voltage motor energy saving technology - digital thyristor cascade control

    Of coal and metal mines mine hoist mostly followed the introduction of the former Soviet Union, series resistance winding rotor speed control technology, technology is

relatively mature, but there are many problems. Can
Silicon cascade speed control technology is also in the 1930s by the introduction of the former Soviet Union, but as previously used analog control method is not very accurate,

computer applications in industry as
The excessive constraints and other reasons, this technology has not been well developed and applied. In recent years, as computer technology has become more sophisticated, Telescopic conveyor

microcontroller, PLC, configuration
Technology, the rapid development of digital technology and applications, computer in the traditional silicon technology cascade control applications and more extensive control screw conveyor

accuracy and reliability get
Greatly improved, in some ways to be better than inverter and DC speed. |

Mine hoist fault monitoring and diagnosis

One of the problem
    Mine hoist is the underground mine of the "throat" device, in the event of failure, the loss is great. Therefore, we must do a good job maintenance work. The traditional

method of repair is generally two kinds of corrective maintenance and preventive maintenance. Corrective maintenance is repair after failure, maintenance mode is difficult to do

well in advance of this production and maintenance plan, and thus high maintenance costs, impact on production. Preventive maintenance is the device running for some time, check

it regularly, cleaning, maintenance or replacement parts to make repairs to prevent equipment failure and downtime. This repair method does not wait until after the shutdown due

to a fault repair, thus increasing the equipment utilization, reduce maintenance costs. Currently, most of the mining companies mine hoist used for preventive maintenance hot water heat exchanger

approach.
    However, preventive maintenance is based on a predetermined time interval to carry out. Fault repair time deterministic randomness and there was a contradiction between the

actual working equipment is prone ashamed still good maintenance period has come to the "excess repair", the device has not yet reached the hidden but maintenance period "less

repair" and frequently caused by human error removal: To solve these problems more effectively carry out maintenance on the equipment, King rational approach should be based on

the quality of equipment running to schedule maintenance work, this method is called predictive maintenance. And really want to do predictive maintenance, you must create a

microcomputer mine hoist fault monitoring and diagnosis system.
2 mine hoist fault models
    To meet starting, speed, braking, and other static and dynamic characteristics of the requirements of the current mine hoist electric transmission system to use more power

thyristor rectifier DC dual-loop speed control system whose failure can be roughly divided into three categories.
2.1 Emergency stop
    Referred to Class I malfunctions which in the event, disconnect the AC and DC circuit and immediately parking brake. Such failures include:
(1) Over winch hoist two terminals; (2) Hydraulic station motor brake system failure; (3) hoist wrong to run; (4) during the operation of the hoist horizontal cradle steady tank belt conveyor design

actuated; (5 ) two terminal speeding; (6) Main motor failure excitation; (7) protection circuit energized; (8) DC main current passing through; (9) DC main circuit overvoltage;
2.2 Accident Parking
    Referred to as Class Ⅱ malfunctions which in the event, hoisting machine will automatically slow down according to the speed chart, reaching less than 2 m / s when the

automatic brake and stop. Such failures include: (a) brake wheel deformation; (2) tail rope failure; (3) Emergency stop, not zero; (4) Operating limit switch failure; (5)

driving safety door is opened; (6) Zero electrical fault; (7) between the two terminals overdrive.
2.3 Signal Prediction
    Referred to as Class Ⅲ failure, such failure occurs, no parking brake, occurs only audible fault signal prediction. Such failures include: (1) the DC main motor bearings

overheating; (2) DC operating current ground; (3) brake pad wear; (4) oil pressure anomaly; (5) ventilation failure; (6) DC main circuit to ground.
    According to these three fault types, we can set up shown in Figure 1 hoist fault model.


    In order to establish fault monitoring and diagnosis system, you must first carry out the above fault classification numbers, and then in the man-machine dialogue, the

successive input above fault type, name, number, and location, so as to prepare the computer to read and identification purposes.
3 fault monitoring and diagnosis
    According to the above fault model, can be used two computer systems to achieve fault monitoring and diagnosis. The first stage is responsible for operating parameter

display, fault comprehensive, stop fault diagnosis, choose a IBM PC, this machine large memory, fast speed, anti-interference ability, and a better interface extension function,

easy to implement man-machine dialogue; second level is responsible for fault detection and fault handling, optional MCS-51 series of low-power 80C31 microcontroller one;

addition, the configuration 16 A / D board a 32-channel digital input board 5, 32 digital output board 2 and 16 D / A output board 1. Hardware system shown in Figure 2.
    Various fault signal acquisition, after conversion circuit into a standard signal, that is normally a logic "1", the fault is logic "0", input by the digital input board;

various operating parameters such as current, voltage, speed, temperature and upgrade, the conversion circuit, by the A / D input board input; various fault processing signals

from the digital output board and D / A output board output.


    80C31 microcontroller can be programmed in assembly language, using a modular way, even if the program debugging and improve the system's versatility, but also to meet the

pre-start hoist, a variety of atresia, troubleshooting, fault monitoring and diagnosis. IBM PC machine can be intelligent Turbo Prolog programming language, the software should

be designed to meet the operating parameter display, integrated operational failure, accident signal prediction, stop fault diagnosis.

Hoist Mixer grinder and other feed processing machinery and installation techniques optional

 

Since the chicken farm settled in the base, in order to maintain chicken meat and eggs delicious, nutrient-rich features, we use to develop their own recipes, buy their own feed

raw materials, processing and preparation of their farming methods. To this end, the base introduced a small feed processing unit, which mainly consists of three parts: the

mill, hoist, Mixer. Its optional and installation techniques are as follows:
1. Grinder
Grinder is the most common feed processing machinery, the current domestic production of major hammer mill and roller mill. Crusher according to the various requirements of the

raw material fed crushed into particles of different sizes. Because the machine model, the hourly processing capacity is different, the motor model is also different. According

to the scale of farming purchase. General chicken factory should purchase two, one to use - spare.
2. Blender
Divided into conventional feed mixers and blenders two kinds of additives. Conventional feed mixer with vertical and horizontal. Vertical mixer mixing time is usually 15 minutes Metal detector for food

-20 minutes and 10 minutes horizontal machine, mixing with the feed should be in batches by stirring. Vertical mixer has the advantage of mixing, less power consumption, the

disadvantage is a long mixing time, low productivity, loading, the material is not sufficient. Horizontal mixer main working parts of the stirring blades, the blade is divided

into inner and outer layers, they spiral in opposite directions. Feed blade stir at work, the inner and outer layers relative to the feed movement, in order to achieve the

purpose of mixing. Horizontal mixer has the advantage of high efficiency, loading, discharging quickly, the disadvantage is the larger power consumption, large area, the price

is higher, it is generally less used.
3 elevator into bucket elevators and screw hoist two kinds, and more generally spiral elevator.
Feed processing unit is generally installed in order to install the grinder, after the installation of the motor and drive belt. Impeller is mounted next to the pulverizer, the

pulverizer of a gate and the mixer is just connected to the feed port. Connect hoist pit and mill imports can be.Food conveyor
Machining, the main raw material poured pit, hoist mill where the raw material increased to smash, then mix into the mixer compartment, other materials may be directly poured

into the feed inlet mixing chamber.

Bucket elevators should be used with attention problems

Bucket elevator is the metal and the corrosive environment of the physical and chemical interactions, change in properties of the metal, causing the metal, and the composition

system environment may be damaged reactive phenomenon.
Corrosion is a chemical change, corrosion of many conditions, such as sulfuric acid corrosion of an object is to be in H, O prolapse in a 2:1 ratio, because the molecule of H2O

H, O ratio is 2:1, the corrosive sulfuric acid, also known as dehydration; Another example NaOH corrosion, corrosion of the object it will destroy proteins, corrosive effects

from Seoul
Corrosion can be divided into two types of wet etching and dry etching. Wet etching refers to the metal in the presence of water corrosion, refers to the dry etching in the Telescopic belt conveyor

absence of liquid water in the dry etching gas. Because the atmosphere generally contain water, chemical production is also often deal with various aqueous solutions, so wet

etching is the most common, but the high temperature operation, the harm caused by dry etching can not be ignored.
However, for the stainless steel bucket elevators selection factors to be considered are:
One, people use any metallic material items are very eager to have super corrosion resistance, so that also extended the period of use, this corrosion resistance is determined

according to human standards, people regularly use, but can not receive its constraints, which reflects its corrosion resistance. Now on the corrosion resistance of stainless

steel are very seriously, the corrosion resistance of stainless steel is currently more than 10 criteria used to select which one as corrosion resistance requirements, to

consider the equipment, the Ministry of the characteristics of a (thickness, size) . Length of life, quality of products (such as impurities, color, purity) and other gravity conveyor

requirements, in general, the process requires the use of smooth and glossy or size precision equipment, instrumentation and components, you can choose from 1 to 3 standards;

pair requires close coordination , does not leak or require the use of long length-limited equipment, components selected from 2 to 5, for the less demanding maintenance easy

life is not very long or require equipment, components can be selected from 4 to 7, in addition to a special exception, the use of stainless steel under the conditions of the

corrosion rate of more than 1mm are generally not used, be pointed out, 10 standard for generating localized corrosion is not applicable.
2, we often say to this metal product is good, most of the first time to consider whether it is corrosion-resistant, corrosion-resistant extent. Currently manufacturers bucket

elevator mostly stainless steel products, but which also has a lot of defects. However, considering these factors must also consider how we use it, and apply it to what the

environment in which. Conditions of use is crucial, including normal conditions (medium, concentration, temperature, impurities, pressure and flow rate constant), no matter how

corrosion resistance, are not held in any environment either to corrosion of metal, the main is a matter of degree. Such as stress corrosion pitting, etc. How then consider less

sensitive; localized corrosion of stainless steel more resistant to general corrosion in corrosive environments well occur, often leading to localized corrosion of stainless

steel equipment, parts suddenly destroyed, its harmfulness far much larger than the general corrosion.
3, we use the process, we have to consider the use of the environment, use of the media in some water and chemical medium, we should note that because the choice was to make

more general consideration is resistant to corrosion, but in practice, For much more localized corrosion phenomena. Such as stress corrosion pitting, etc. How then consider less

sensitive; localized corrosion of stainless steel more resistant to general corrosion in corrosive environments well occur, often leading to localized corrosion of stainless

steel equipment, parts suddenly destroyed, its harmfulness far much larger than the general corrosion.
4, in some conditions of use, will encounter other situations, for example in the use of the bucket elevator in the process of product components is easy because parts corrosion

and failure, then we should timely analysis lead to corrosion of the reasons, the right remedy in a timely manner remedy, so that our products will wait until the maximum value

in use.

Bucket elevator several common reasons for failure and exclusion methods

Bucket elevator is agro-processing factories and towns widely used in a vertical grain management elevator equipment, with a lifting height, improve stability, small footprint

and good sealing, etc.. Suitable elevator powder, granular and small bulk materials.
Are several common failures of the equipment to analyze the causes and proposed exclusion approach:
A hopper with skid
(1) bucket elevator is the use of hopper bands and head round the friction torque between the drive shaft for elevator materials, unpredictable enough hopper belt tension will

cause the hopper with skid. At this time, you should immediately shut down, adjust the belt tensioning device to tighten the hopper. If you can not make the hopper belt

tensioning device is fully tensioned tensioning device described the trip was too short, should be re-adjusted. Correct adjustment method is: unlock hopper with coupling to the

bottom tensioning device on the wheel adjusted to the highest position, the hopper with the head placed by the hoist through the first round and bottom round, and both

connected, so that the hopper without tension in the tension band state. Then the tensioning device is fully tensioned. At this point tensioning device untapped tension Power Roller Conveyor

adjustment screw stroke of not less than 50% of the whole trip.
(2) hoist overload hoist overload, resistance torque increases, resulting in the hopper with skid. You should reduce the amount of material fed and seeks uniform feeding. If you

reduce the feed rate, still not improve skid, sit inside the machine may be too much or material accumulation mentor material hopper are stuck, you should stop to check,

troubleshooting.
(3) the first round of the drive shaft and the inner surface is too smooth hopper with round shafts and heads hopper with the inner surface is too smooth, so that the friction

between them decreases, resulting in the hopper with skid. At this time, the hopper with the shaft and the inner surface coated with a layer of adhesive to increase the

friction.
(4) the end of the first round and the first round of wheel bearing rotation ineffective and bottom wheel bearing rotation ineffective, moment of resistance increases, causing flexible conveyor

the hopper with skid. Then washable refueling or replace bearings.
2 hopper with a deviation
(A) the end of the first round and the first round wheel shaft is improperly installed wheel shaft is improperly installed and the bottom is mainly reflected in the following

aspects: First, the end of the first round of the wheel and drive shaft in the same vertical plane and not parallel; Second two shafts are mounted in a horizontal position and

not in the same vertical plane; third two parallel shafts, and not in the same vertical plane level. At this time, the hopper with a deviation could easily cause a crash and

barrel hopper, hopper bands tear. Should be immediately shut down, troubleshooting. Be the first wheel and a bottom wheel shaft mounted in the same vertical plane, and are in a

horizontal position, the whole height 1000mm vertical centerline deviation of less than 2mm, accumulated deviation does not exceed 8mm.
(2) hopper with hopper with connector fitting errors is not exactly mean with combined hopper, the hopper is not in line with the edge of a straight line. Work, while tight side

of the hopper with loose, so that the hopper to the tight side with lateral movement, resulting deviation, resulting in inadequate feeding hopper Sheng, discharge is not

complete, back to the material increased, decreased productivity, causing severe side hopper with a card , torn. At this time should be shut down, fix joints and connected.
3 material back too
Elevator back to the material means material in the unloading position not fully discharged outside the machine, and some of the material hoist machine back seat of the

phenomenon. In improving operations, if elevator back to the material too, is bound to reduce production efficiency, increase power consumption and material breakage. Causing

material back more for the following reasons:
(1) Hopper running too fast Lifting different materials, the speed of operation is different from the hopper: Average enhance dry powder and pellets, the rate of about 1 ~ 2m /

s; elevate bulk materials, the speed of 0.4 ~ 0.6m / s; enhance the wet powder and pellets, the speed of 0.6 ~ 0.8m / s. Speed ​​is too large, early discharge, causing material

back. At this time should be based on improvement of materials, appropriate to reduce the speed of the hopper to prevent back feed.
(2) discharge outlet nose tongue plate mounting inappropriate, tongue plate location is too far away from the hopper discharge will cause back feed. Should be timely adjusted

tongue position to avoid back feed.
4 hopper off
Hopper off refers to the production, the hopper falling from the hopper belt phenomenon. Hopper is dropped, it will produce abnormal sound, to timely stop to check, otherwise,

will lead to more hoppers deformation, shedding; positions in connection hopper, hopper band tear. Produce hopper off the main reasons are:
(1) Feed feed too much too much, resulting inside the base material in the accumulation of resistance increases elevator, hopper runs sluggish, is to produce hopper off, the

direct cause of deformation. You should immediately shut down, out of the base under the flapper, from the plane seat backlog and replacement of new hopper, then drive

production. Then reduce the feed rate, and seeks uniformity.
(2) feed inlet position is too low in general, in the production hoist, hopper scooping themselves come from the material inlet. If the feed inlet position is too low will

result in no time scooping material hopper, while most of the material into the machine base, causing the hopper scoop materials. The material is massive, it is easy to cause

deformation of the hopper, fall off. At this time, you should adjust the position of the inlet end of round above the centerline.
(3) hopper material is not good, the intensity is limited hopper hoist bearing member, it has a high material requirements, installation should be as good material matching

strength. Usually, the hopper with ordinary steel or galvanized sheet metal welding or stamping, folding the edges using galvanized wire or involved to enhance the strength of

the hopper.
(4) boot inside the base does not clear a backlog of material in production, often encounter a sudden power failure or other causes shutdown of the phenomenon, if more power,

there is no clear backlog inside the base material, it is easy to cause the hopper by Shock is too large to break off. Thus, in between stop and start, you must clear the

backlog physics base, avoiding the hopper off. Also, regularly check the hopper and the hopper is firmly connected with, the screws loose, fall off and the hopper skew, damage

and other phenomena, it shall promptly repair or replace, to prevent more accidents happen.
5 hopper with tear
Hoist hopper with typically canvas belt, sometimes with tape and chains. In the combined effects of various faults, canvas belts and tape prone to tear, which is one of the most

serious failures. General hopper and the hopper with a deviation most likely caused by the shedding process hopper tear. Should be timely and comprehensive identification of

reasons for troubleshooting. In addition, the material is mixed with a sharp edge of the foreign body, will also split hopper with planning. Therefore, the production, it should

be installed in the inlet or magnet wire mesh to prevent large objects have fallen into the base.

Chain conveyors for powder material is water efficient mixing equipment

   Chain conveyor is to be spray powder material mixing, mixing efficient equipment. Mainly used in thermal power plant dust, but also for chemical industry, metallurgy, mining,

building materials and other industries. By controlling the amount of water has reached proper humidity requirements. Double chain conveyor

Shaft with two sets of helical blade for mixing, with stirring, high efficiency, small footprint, high wear-resistant helical blade special alloy or composite ceramics, long

life and other characteristics. Using cycloid reducer drive, smooth rotation, low noise. Chain conveyor from biaxial mixermaterial handling conveyor

Top feed, bottom discharge, reasonable structure. The tight seal between the joint surface, smooth operation. Chain conveyor with spray humidification system to ensure uniform

water, regulating water supply to meet the needs. Concentrated using hand pressure pump supplying four drive bearing grease for easy set up

Use of equipment maintenance, highly efficient, time-saving advantages. Chain conveyor use and features: SJ series of chain conveyor, the machine used for power plant fly ash,

coal, sand, or other blended materials, mixing evenly, improve and enhance the mixing processing performance. The chain conveyor with

Good sealing performance, feeding uniform, low noise characteristics, chain conveyor product of the performance indicators are better than similar products, back gray pumps. The

user has won praise and trust.
      Chain conveyor conveying system has a good solution to save water, reduce the area and environmental requirements of this problem. The main features of this technology is

the use of a specially designed double casing pipe structure, combined with chain conveyor pneumatic conveying process tube gas-solid flows

Characteristics can be achieved within the fly ash deposition or clogged pipes constant disturbances and automatically clear, with a chain conveyor mechanism clever advanced

security, transport at high concentrations, flow rates, low wear characteristics. While pneumatic ash handling system security, and reliability are increased, and promote plant

Energy, water and reduce the area and utilization of fly ash.pallet conveyor
      Chain conveyor structure from the structure and use a uniform feed, leaves lose, mixing hit humidification three parts. And with a special electronic control and water

supply systems. The device has a large capacity, compact structure, advanced technology, stable and reliable, easy maintenance and so on. That

The whole structure fixed on a shelf, when the machine work, by the impeller feeder evenly enter the silo dust within the host, and then by the high-speed operation of the chain

conveyor blade to the material into a blender with a simple ratchet , the chain conveyor structure through high-speed operation of the ratchet and put dust and limitations

The amount of water forced mixing, the mixing structure of the chain conveyor during break, the previously given standard humidity mixture toward the discharge port, to solve

the purpose of secondary dust. The structure of supply chain conveyor is controlled by a valve group to stabilize the system and clean water supply

Water quality, set the filter pipeline by master cabinet on various parts of the chain conveyor interlock control, in order to control the water supply humidistat purpose of

running.
      Chain conveyor consists of chassis, screw shaft assembly, drives, piping, cover, chain cover and other components, the specific structural characteristics are as follows:

1, the chain conveyor plates and steel casing constituted mainly by the forming within the welding factory and assembled with other components

Together with the chain conveyor support. Housing sealed tight, there will be outside the Yang ash, ash leakage phenomenon. 2, biaxial screw shaft assembly chain conveyor chain

conveyors is a major component of its components are mainly spin around the helical axis, bearing, bearing sleeve, bearing cap

, Gears, sprockets, oil cups, blades and other components. 3, add water to wet pipe mainly by the receivership, connectors and nozzle. Cone spray nozzle with stainless steel

nozzles arranged in the interior of the enclosure top chain conveyors, arranged axially along the helical axis, in order to facilitate the formation of curtain materials plus

Wet mixing. Nozzle structure is simple, easy to replace, stainless steel, corrosion and durable, pneumatic conveying equipment. By operating on the water supply pipe valve can

be adjusted manually adjust the moisture content of wet ash. 4, the chain conveyor cover includes the right cover, middle cover, left cover, manhole covers and inspection

Manhole cover. On both sides of the chain conveyor is provided with six manhole to facilitate the operator usually overhaul and maintenance.

Conveyor belt assembly line conveyor chain conveyor

Transportation equipment, lines, belt conveyors, chain conveyor transport device is a friction drive continuous manner for material transport machinery. Apply it, the material

can be transported in a certain line, the feed point from the initial to the final discharge point between the formation of a material transfer process

. It can be granular material transport can also be carried into the delivery of items. In addition to the purely material handling, but also with various industrial enterprises

in the production process requirements matching process, the formation of the rhythmic flow transport line. So extensive transportation equipment

Applied to a variety of modern industrial enterprises.drag chain conveyor
Pipeline is in a certain line continuous conveyor cargo handling machinery, also known as transmission lines or conveyor. According to transport products can be roughly divided

into: belt line, plate chain, multiple chain line, plug wire, wire mesh belt, suspension lines and drum lines these seven categories pipeline. A

Typically include traction, bearing components, drive means, tensioning means for redirecting means and the support parts. Conveyor can be horizontal, inclined and vertical

conveyor can also be composed space transmission lines, transmission lines are generally fixed. Pipeline transport capacity, long distance, but also in lost

Delivery process while completing a number of process operations, so widely used.
Belt conveyors wide variety of materials, structural forms, except for the normal delivery of materials, but also to meet the oil, heat, corrosion-resistant, anti-static and

other special requirements of material handling. Belt conveyor used for conveying small parts scattered and less weight 100kg

Items. In the assembly, packaging production line, as well as food, medicine and other needs of non-polluting industries are widely used. Belt conveyor mainly from the rack, Flexible Roller Conveyor

conveyor belt, belt roller, tensioning devices, drives and other components.
Hanging chain belt conveyor assembly line conveyor belt assembly line anti-static workbench.

Clinker conveying equipment and experience the transformation

Although the selection of the first paragraph of conveying equipment bucket chain conveyor, clinker cooling properly, but its length is only about 17m, its rate, the clinker in

the bucket chain conveyor residence time of about one minute, for clinker cooling effect is very limited. According to the information, ordinary type of

Belt conveyor belt can transport the material temperature at 70 ℃ (the other information on the 60 ℃) or less, so that even in the case of normal production kiln, the clinker

cooler temperatures according to the design value of 65 plus ℃ ambient temperature, temperature of the material has been greater than ordinary type, if the kiln

Production is not normal, it can be a roller conveyor belts and certainly does not work, ranging from reduced life expectancy, while in burned tape. So the selection of belt

conveyor is improper, and with a belt or with an electric drum machine, you can not even fit. Also proved by actual operation, selection of the belt

Machine is not acceptable. This process design aspects in the future to attract attention, do not make the same mistake. B650 × 38.461m is also a part of the pit (tail-4.4m) Elevator conveyor

and D640 bucket chain belt conveyor machine frame than the B rack to height of about 700mm, in order to shorten the installation time, try using the original

To the device, I was doing when the process layout, put into the joint reservoir bucket chain conveyor belt conveyor in the original basis along the original B650 × 38.416m

forwards in the direction parallel to the belt conveyor moves about 3.2m, so that original belt B650 × 38.416m become DS640 × 41.311m

, And the original reservoir into joint belt machine B640 × 40.309m becomes D640 × 38.532m. Thus, in the present case can do a good job into the joint reservoir bucket chain

conveyor head gear. Basis of the original belt as the current D640 × 41.311m foundation. For

Increased due to the rack appear D640, D640 put the original frame header portion by about 600mm, the rest unchanged.

Through the last few days of removal and installation (in the reservoir into the joint bucket chain conveyor has been installed, another chain bucket machine head gear case has

also been installed), new equipment successfully put into operation, and the state is better to solve the transportation equipment on the impact of the kiln while running

Costs are greatly reduced, so that the transformation proved to be successful. The need for such a transformation, I believe, is due to consider not comprehensive process curve conveyor

design, equipment selection improper. Because it is in situ transformation, kiln no major changes, its original Nishun Fangxiang An

Installed Φ2.8m × 28m Monocular cooling machine is removed, while in the downstream direction kiln installed one 100t / d third generation of inflatable beam grate cooler,

clinker conveying equipment from a station DS640 × 17.646m chain bucket conveyor, a tilt table layout (9.2 ℃) of B650 × 38.416m belt conveyor (referred to Section

One belt conveyor) and another diagonal arrangement (11.5 ℃) of B650 × 40.309m belt conveyor (belt conveyor referred to Section 2) composed of a Z-shaped arrangement of the

clinker joint reservoir. After six months of use, because the clinker grate cooler temperature is high (a rotary kiln operation factors, but

The author in other NSP clinker rotary kiln production line also saw a relatively high temperature, when the two belt conveyors are supervised, if there is red material, on the

use of artificial watering (for a certain quality of clinker effect) in the case, a belt burn times (especially the first one

Belts), only nine times on the change of the belt, the belt drive 11kW electric drum also due to high temperature, was burned twice, the impact on production is considerable.

Material handling equipment

Structural principle approach flow channel structure according to their different functions which are different, but the basic components are: a certain inclination of the tank,

pumps, manifolds, etc. for the flow of food material can be used to send channel brick, concrete water within the tiled, can also be stainless steel or rigid polyethylene plate.

slot

Can be square or rectangular shape, the bottom can be flat or semicircular. Procedure: When sending material into the flow channel, because of its velocity, water flow in an

inclined groove, so that the material transported by the water flow, and due to the water soaking and washing, the appearance of the sediment material impurities inflow water, Belt conveyor

and launder outlet

Department is equipped with water separator for separating the sediment impurities, purify water through a filter and then recycled. Material remains in the watershed above

procedure after entering if the transmission medium with saline or a certain concentration of acid, lye, etc. , the material according to the technical requirements of a certain

length in the physical and chemical treatment

Such as orange petal de sac clothing streamed trough acid, lye, water three streamed bad combination, and with a high pH liquid tank, acid and alkali liquid storage worse, acid

pumps, etc. in orange flap acid pickling tank streamed about 20min to soften, dryer, then dip into the gutter alkali lye 5min corrosion sac clothing, to most of the

Sac clothes off, finally, into the water stream sent by the rinse tank, and ultimately complete removal of cyst membrane. Material handling equipment in a food factory, there is

a large number of materials, such as food ingredients, excipients or scrap materials and finished or semi-finished products and the delivery of containers containing problem of

food factories role of conveying machinery

: On a single machine or a production line, the material according to the requirements of the production process from one workplace to another place of work, sometimes in the

transmission process of the material for the process operation. Transportation machinery Category: continuity of the process by sending : divided into two continuous and

intermittent

Class according to transmission mode of motion: divided into linear and rotary Press Drive: divided into mechanical drive, hydraulic drive, pneumatic drive and electromagnetic

drives and other types of material sent by: divided solid materials transfer and fluid the transfer material. transportation of solid materials, using a variety of

Types of conveyors; transmission fluid when the material is used in various forms of pump gas, fluid delivery device. Conveyor role: for the massive, granular materials and Plastic belt conveyor

materials for the whole direction of the horizontal or inclined transportation. Also check the packaging used for cleaning and pretreatment options

Console and other conveyor works: is the use of a closed annular band, led by a drum exercise, stress testing equipment, materials on the belt by friction comes forward,

transported to the other end with ( or a predetermined position] by gravity (or unloader] Remove the conveyor advantages and

Point: the working speed range (0.02 ~ 4.00m / s), long distance transport, power is not needed, simple structure, reliable, easy to use, wide adaptability, easy maintenance

overhaul, no noise, pressure pump, capable of full fuselage anywhere unloading and loading. main drawback: It is lightweight powder conveying

Like material is easy to fly, the tilt angle is not too large, higher cost, if offered to transport needs of multiple machines in combination. Bucket elevator applications in

the food industry: for the uphill transport of materials, ease of production. bucket elevator main advantages: It is a small footprint, can elevate the material

To a higher position (30 ~ 50m), a large range of productivity (3 ~ 160m3 / h). Disadvantages: It is overload sensitive and must be uniformly continuous feed. Bucket elevator

mechanical conveying direction of the material can be divided into tilt and vertical two kinds; press traction mechanism different, can be divided into belts and chain bucket

bucket

Type (single chain and double chain) two kinds; Also can be used for feeding, mixing and other operations. Conveyor features: simple structure, small cross-sectional size, low

cost, good sealing performance, facilitate the production needs intermediate position of loading and unloading, safe and convenient operation. conveyor

Drawback: the material easily broken during transportation, while the larger spiral blade and chute wear in transportation of materials, materials with both friction between the

casing and the screw, so the power consumption of large units, overload is low. Conveyor Using an ambient temperature of a 20 ~ 150 ℃, the material temperature 200

℃, and mostly used for horizontal transport, for the inclined conveyor, its inclination should generally be less than 20., Conveyor capacity is generally 40m3 / h or less,

conveyor length L 40m, a maximum of 70m.
     The working principle of the screw conveyor: the rotary screw conveyor conveying the material to be fixed inside the casing in the passage for conveying the material due to

gravity and the friction effect of the groove wall in the movement does not rotate together with the screw, but in the form of sliding along the material

Trough moving its situation does not seem to rotate the nut along the rotating screw for translational motion as the commonly used hydraulic pumps and material handling

equipment have streamed trough conveyor Press conveyor speed of high-speed and low-speed two kinds. Bucket elevator machine principle: it with tape or chains for traction parts,

will

One member hopper fixed traction, traction member having upper and lower rotating drum tension and drive operation. Material from the hopper to join the lower hoist, raised to

the top of the hopper bypassing runner, material hopper unloading begins, material so as to achieve the increased height of the lower purpose the operation of this machine

Components installed in the chassis to prevent dust from flying out in the appropriate location, with viewport. Conveyor is a flexible traction element without continuous

conveyor machinery. Conveyor role: all kinds of powder, granular, small block deliveries require sealing materials, such as flour, cereal, pineapple

Core, peel, etc., it is also fermented plant more widely used as a delivery device, such as breweries commonly used in conveying barley and malt; soy sauce soy sauce koji used

for transporting used cooking good material; 1. Material conveying pump Pipe 1) function uses material pump is a water without damage

Conveying fresh vegetables, fruits, fish, shellfish and cereals special pump it with other transportation equipment and hoists, compared with a small footprint, pipeline

technology, is transported goods susceptible to pollution, sanitation, while device structure is simple, easy to operate, stable, vibration-free, water-

Level can enhance the vertical transport conveyor for cereals (such as beans, corn, barley, etc.), pre-boiled fruit and vegetable material (such as mushrooms, green beans,

peaches, apples, Li, etc.) .2) Work material pump is a special structure of the pump, the impeller of which is not complete with pump compared to its different points in

addition to

Incomplete impeller, the flow channel which is one and the same curved pipe section, showing coil shape shown below: It can pump through the suction port of the arbitrary shape

of solid materials together easily with the water intake, no damage discharged .2. streamed Slot 1) function uses streamed trough the use of hydraulic transport

Materials, equipment, according to the needs of fruit and vegetable processing materials, process equipment back and forth between the material handling or processing,

especially for some not suitable for mechanical transport and processing of raw fruits and vegetables and processed intermediate goods used to achieve continuous flow delivery

slots production is a very effective hand

Segments, such as green beans, salt flooding insects processes orange petal pH France de sac coat process, instead of using the stream channel storage cylinder used in the past,

bad clearance highly labor operations, and to achieve a continuous machining operation, therefore, streamed from the slot in addition to conveying and cooling effects, but also

play the role of processing

Gas delivery equipment

Gas handling equipment for gas compression and transportation equipment in general. In the wide range of applications in various industrial sectors. There are the following

three purposes: (1) transporting the gas from the point A to the point B, the gas does not change the initial and final pressure (blower); (2) to improve the gas pressure (with

Compressor); (3) is used to reduce the gas (or vapor) pressure (vacuum pump). Generally based on the pressure generated into four categories: (1) a blower gauge pressure not

greater than 0.015 MPa (0.15 atm or 1500 mm water column); (2) blower, pressure gauge .015 ~ 0.2 trillion

Pa (0.15 to 2 atm); (3) the compressor, the pressure is the gauge pressure 0.2 MPa (2 atmospheres) or more; (4) a vacuum pump, the pressure below atmospheric pressure.gravity conveyor
Centrifugal blower
Structural characteristics of centrifugal blower: centrifugal blower and centrifugal resemble the shape, internal structure, there are many similarities. For example, a

centrifugal blower volute passage is also circular; but the shell diameter and thickness of the relatively large; impeller blades larger number; high speed

; Are equipped with peripheral impeller Introduction. Single-stage exit at 30kPa gauge more or less; multi-level up to 0. 3MPa. Selection centrifugal blower centrifugal fan with

the same method.
Centrifugal compressor
Structure
Rotor: spindle, multi-stage impeller, shaft and balanced components
Stator: cylinders and partitions
Works
At all levels of the gas in the axial center of the impeller, the impeller is rotated by acting, by the centrifugal force, leaves the impeller at high speed, into the diffuser.

Gas inside the diffuser spin down, pressurization. The diffuser deceleration, pressurized gas into the corners, so that the flow reversed 180 degrees backward

Into the reflux, reflux condenser and then through the impeller into the next one. Obviously, corners and reflux is a communication before and after an impeller impeller

channel. So, the gas is increased in a number of times the impeller, can be very high pressure to leave.
Gas transportation equipment - Industrial Applications
① gas transportation: In order to overcome the resistance of the pipeline, the need to improve the gas pressure purely for the purpose of conveying the gas pressure, pressure

is generally not high. However, a large amount of gas delivery is often transported, often require considerable power.
② generate high pressure gas: the chemical industry requires a number of chemical reactions under high pressure, such as ammonia synthesis, the bulk polymerization of ethylene; automated sorting machine

process also requires a number of separation under high pressure, such as gas liquefaction and separation. These high-pressure gas for the process of the delivery of the

relevant

Outlet pressure equipment presents considerable demands.
③ production of vacuum: a considerable number of unit operations is carried out below atmospheric pressure in the case, then you need to pump the gas out of the device to

generate a vacuum.
Gas transportation equipment - general characteristics
① Power consumption: for a certain mass flow rate, density of the gas, the volume flow rate greatly. Therefore, the flow rate of the gas feed pipe is much greater than the

liquid, the former Economic flow (15 ~ 25m / s) around the latter (1 ~ 3m / s) of 10 times. Thus, in order to convey with their economic flow

Sample mass flow rate through the same pipe length resistance loss of the gas after the liquid is about 10 times. Thus the power consumption of gas delivery equipment are often

large.
② volume of gas delivery devices are generally massive, high mechanical pressure on exports even more.
③ As the compressibility of the gas, the internal gas pressure in the conveying machine while changing the volume and temperature will also change. These changes the structure

of the gas delivery device, the shape has a great influence. Therefore, the gas delivery device needs to be classified according to the outlet pressure

.
Gas transportation equipment - equipment classification
Gas delivery device can also be divided according to the principle of centrifugal, rotary, reciprocating and jet so on. Press the outlet pressure (final pressure) and

compression ratio divided into the following categories:
① fan: final pressure (gauge pressure, the same below) is not greater than 15kPa (about 1500mmH2O), compression ratio of 1 to 1.15
② Blower: final pressure 15 ~ 300kPa, the compression ratio is less than 4.
③ Compressor: final pressure in more than 300kPa, the compression ratio is greater than 4.
④ pump: negative pressure within the apparatus, the final pressure is atmospheric pressure, the compression ratio determined by the degree of vacuum.
Gas transportation equipment - represents the device
Centrifugal fan
Works
(1) In order to meet the requirements of large conveying air, ventilator impeller diameter is generally relatively large.
(2) the number of impeller blades more.
(3) leaves have a straight, curved front, rear bend. The main requirement is that the ventilation fan capacity, not in pursuit of high efficiency, with the former becoming

blades help to improve the pressure head, reducing the impeller diameter.
(4) the gradual expansion chassis and export channel of circular cross-section which is often not rectangular.
Performance Parameters
(1) Air flow: state dollars at the entrance of the exhaust volume per unit time. m3 / s, m3 / h
(2) Total pressure: when the fan unit volume of gas through the energy gained, J/m3, Pa
Equipment Selection
(1) according to the gas type and pressure range, determine the type of fan
(2) determine the required air flow and full pressure. Air volume production tasks according to set; whole pressure by Bernoulli's equation to find, but according to standard

conditions corrected that, according to the state at the entrance of the air flow meter and the corrected total pressure in the product family table to find a suitable model.
Review
(1) When the compressibility of the gas can be neglected, the gas conveying path calculation similar to the calculation of the liquid transfer line, the difference is that the

fan characteristic curve itself and the pipe and the air density. So when the transport is not room temperature, atmospheric air, pipeline characteristic curve should be pre-

Conversion.
(2) with the same pipeline transporting gas, the gas temperature decreases, the density increases, the mass flow rate may be increased significantly.

On the transportation equipment

  Screw conveyor transportation equipment category there is something called the screw conveyor (commonly known as the cutter). Its overall structure and the internal structure

from head section, the middle section, tail section and drive parts. Screw conveyor has a simple structure, small footprint, easy sealing device for easy filling and multi-point

Multi-point discharge, management, and operation is relatively simple and so on. Commonly used in the horizontal direction to or less than 20 degrees tilt transport all kinds of

powder and granular materials, such as raw materials, coal, cement and slag. Screw conveyor drawback is running great resistance, other than the conveyor power consumption, and

Mechanical wear faster, the amount of maintenance. Should not be used to transport caking sticky, granular pieces, large abrasive material, the material is transported to the

temperature below 200 degrees. Commonly used in small and medium-throughput and transmission distance is less than 50m occasions. What kind of transportation equipment using the

classification, mainly to see whether the operator

Fit their own needs and development needs. Should try everything from the reality. Transportation equipment is the industry invested more, and a relatively high degree of check weighers

concern pipeline equipment. Conveying equipment including: bucket elevators, belt bucket elevator centrifugal, centrifugal bucket elevator chain

Machine, board chain bucket elevator, screw conveyor and other five. 1, bucket elevator bucket elevator conveyor hopper solid traction followed by a series of elements (belt or

chain) around the head of the hoist between the wheel and tail wheel, form a closed contour. Wheel drive and head connected to the bucket lift

L machine to obtain the necessary tension to ensure the normal operation. Material from the bottom of the hoist machine is fed through a series of hoppers upward to the head,

where it will unload, enabling transportation of materials in the vertical direction. Bucket elevator hopper and traction components such as undercarriage and head and wheel,

Tail wheel installed in fully enclosed within the casing. 2, tape centrifugal bucket elevator (also known as D-type bucket elevator) This member is a rubber conveyor belt

traction. Run rely head hopper tape drive roller and friction drive. Advantage of low cost, low weight, smooth

No noise, can be higher operating speed (typically 1-3m / s), so a greater productivity. However, the tape is fixed to the hopper is weak, the tape strength is low. Generally heat exchange manufacturers

suitable for conveying powder and small pieces of strong, non-abrasive or semi-abrasive, the temperature of the material does not exceed 80 degrees; if super-

Over 80 degrees, you need to use heat-resistant tape. Its way to dig-in loading, unloading method is centrifugal. Bucket elevator is Hopper Width (mm) represented. Domestic D-

type bucket elevator specifications are D160, D250, D350, D450 four kinds of three, chain centrifugal bucket elevator (also known as HL type bucket

Hoist) centrifugal chain bucket elevator traction components of the chain. Run rely head hopper drive sprocket and chain friction drive. Hopper speed is generally 1-1.4m / s.

Advantage is not subject to restrictions on the type of material to be transported, and the lifting height. However, when used chain mill

Loss of large, sometimes occur "missing link" accident. Suitable for conveying abrasive little variety powder, granules, blocks strong materials and high temperature materials.

Loading hopper manner dig type, centrifugal discharge mode. Domestic HL type bucket elevator specifications HL300, HL400, HL500 three kinds

, Its technical performance in Table 10.5.D-and HL type bucket elevator bucket hopper with deep and shallow bucket of two types. 4, plate chain bucket elevator (also known as

PL-type bucket elevator) the classification of the conveyor traction member is plate chain. Material is to rely on the operation of the head drive sprocket chain toggle plate

Transmission. Hopper running very slow (0.4m / s). Suitable for transporting temperature of 250 degrees, density, abrasive, bulk materials, such as lump coal, limestone, cement

clinker and so on. Way for the flow-type loading, unloading method is gravity. Hopper scales shape style bucket.

Screw you know the safe operation

 Screw the whole production chain has become one of important equipments. Advanced structure, adaptable, small resistance, long life, easy maintenance, protection devices is a

significant feature of the screw conveyor. Screw conveyor can not run in the subsequent stage of the inverter circuit, such as the identification of maintenance needs, you must

stop the inverter in case of operation, otherwise it may damage the drive.
Before running the screw conveyor, first make sure that the screw conveyor equipment, personnel, is transported goods are in safe intact state; Second, check all moving parts of

the normal no foreign body, check all electrical wiring is normal, normal to the belt conveyor put into operation. Finally, check the supply voltage and the device does not

exceed the difference between the rated voltage ± 5%.heat exchange manufacturers
Run into the screw conveyor, you must do the following:
1 Close the main power switch, check the device power is being fed properly and the power indicator is lit. To normal after the next step.
2 Close the power switch on each loop, check whether it is normal. Under normal conditions of: device does not operate, belt conveyors running light is not on, inverter and

other equipment, power indicator light, the inverter display panel shows the normal (no fault code is displayed).
3 in accordance with the process starts all electrical equipment in turn, starting on a normal electrical equipment (motors or other equipment has reached the normal speed, the

normal state) and then the next one electrical device startup.
In the screw conveyor operation, is transported goods must comply with the requirements of the design objects, to comply with screw conveyor design capabilities. Secondly, we

must pay attention to all categories of personnel not touch the moving parts of the conveyor belt, non-professionals are not free to contact with electrical components, control
Incline Belt conveyor
buttons, etc

A detailed description of LS screw conveyor

LS-type screw conveyor screw diameter of 100 ~ 1250mm, namely eleven kinds of specifications, drive a single-ended drive and double-ended drive in two forms; LS screw conveyor

body length of a file every 0.5m, depending on the site appropriate delivery systems need to be composed with the same GX type screw conveyor for horizontal or angle less than

20 ° unidirectional transport. LC-type conveyor suitable for vertical or perpendicular to a larger angle to transport powdered or granular, not sticky, bulk density of 0.5 to

1.3 dry material. LC-type vertical screw conveyor screw diameter 200,250,315 stereotypes, such as several specifications, the maximum lifting height of not more than 8m, body

height 0.5m one file each, depending on the site needs to be composed corresponding increase delivery systems. LS-type screw conveyor screw conveyor use and features are

metallurgy, building materials, chemical industry, food processing and other sectors and machinery widely used as a continuous conveyor. Transportation of materials from the

perspective of the direction of displacement divided into horizontal screw conveyor screw conveyor screw conveyor and vertical two types, mainly used for all kinds of powder, automated sorting machine

granular and small block, such as the level of transport loose materials and vertical lift, the aircraft is suitable for transporting perishable, viscous, easy caking or high

temperature, afraid of pressure, there is greater corrosive special materials. Screw conveyors are generally body material inlet and outlet and the drive unit has three major

components; screw conveyor helical blades have a physical spiral surface with spiral blade helicoid surface and the three forms, which vane helical surface application

relatively small, mainly used for transporting material viscosity and compressibility, this snail hanging face, with the completion of the process of transfer operations, both

of materials and finish stirring, mixing and other functions. Screw conveyor and other transportation equipment, compared with a whole section of small size, good sealing

performance, stable and reliable, can be more than the middle point of loading and unloading and safe operation, easy maintenance and so on. Screw use environment temperature is

generally -20 ~ 50 ℃; wherein the horizontal screw conveyor, which transport the material temperature should be less than 200 ℃; conveyor angle β should generally be less

than 20 °; conveying distance is generally less than 40m, the maximum is not More than 70m. Vertical screw conveyor, which convey the material temperature does not exceed 80 ℃

, vertical lifting height does not exceed 8m. Given the scope and application of the screw conveyor features, users in the selection should be based on use of the environment

and transport of materials sufficient to consider the case, balanced, reasonable selected in order to avoid unnecessary trouble and loss. Screw-speaking countries styling

products. GX model, LS-LC and screw conveyor are stable and mature technology of Department gradually standardized universal conveying equipment.
GX type screw conveyor spiral Total 150,200,250,300,400,500,600 mm diameter seven kinds of specifications, the shortest body of 3m, up to 70m, in steps of 0.5m, depending on the

site needs to be composed appropriate delivery system for horizontal angle is less than 20 °, or one-way transportation.Belt conveyor

Screw conveyor operation

1) Drive within the speed reducer lubricant application Gasoline HQ-10 (GB485-81) oil change once every 3-6 months. (2) jacketed screw conveyor spiral ends with lithium grease

inside the bearing, once every half note, 5 g. (3) screw machine hanging bearing, the choice of M1 category, including 80000 type bearing assembly has infiltrated the oil,

usually as little fuel; every 3-5 months, together with the hanging hanging shaft bearing body removed, remove the seal circle, the hanging bearing and 80000 bearing immersed in

molten lubrication with grease a cooling and re-installed to use, such as nylon ring damage should be replaced, for one year, using the above method maintenance once again, be

good results. (4) jacket hanging conveyor screw conveyor bearings, the choice of M2 category, class Note grease, greasing each hanging bush 5 g; temperature materials should be
Turn conveyor
used ZN2 sodium based grease (GB492-77); using self-lubricating bush, we should also add a small amount of grease. Jacketed screw conveyor irregularities occur during operation

should be checked, and the elimination of, not forced to operate.Check weigher

Vertical screw conveyor problem

By the National Science and Technology, China Institute of Metrology Traffic Professional Committee, China Association of Automation Engineering Council and the China Nonferrous

Engineering and Research Institute and other institutions of the Consultative Group of Experts adopted the electromagnetic flowmeter, agreed that, liuliangjisjm the project

product is "HART" communication protocol technology, a private detective and measurement speed nozzle body integration design, private detectives new transformer-isolated

detachable ultrasonic transmitter and receiver, the products anti-interference ability, great range, especially in low flow and seismic performance and country has great

advantages compared to similar products, the main technical indicators have reached the international advanced level, to fill the field of measuring equipment technology gaps.
Currently, the main instrument screw conveyor vortex flowmeter, differential pressure flow meter, shunt rotor flowmeter, Annubar, float type flow meters, etc., where the main

discussion vortex flowmeter, orifice flowmeter and elbow flowmeter. As a new conveyor flow meter, developed rapidly since the mid-1980s, it has a lot of flow measurement

advantages and strengths, in the modern flow measurement more widely. The domestic use of vortex flowmeter for flow measurements are also increasingly get attention, present, Pharmaceutical metal detector

China has excellent performance and have independent intellectual property products. Vortex flowmeter is based on the fluid vibration developed, according to the vortex of

different detection methods from the hot wire type, thermal stress gradually developed a style, type and differential switched capacitor magnetic, ultrasonic, etc. Vortex

flowmeter can be used for almost all occasions form a vortex column, not only for the closed tube, but also for the open grooves. Compared with the turbine flowmeter, vortex

flowmeter has no moving mechanical parts, less maintenance, meter constant stability; compared with the orifice plate flowmeter, turbine flowmeter measuring range, small

pressure loss, high accuracy, installation and maintenance easy. However, vortex flowmeter parameters related to the environment are more likely to be ignored in the use of the Automatic Sorting Machine

site and affect the proper performance of flowmeters play.