Screw conveyor range of applications and technical characteristics

    Screw conveyor is widely used in various industries , such as building materials , electric power , metallurgy , coal charcoal, food and other industries , for horizontal or

inclined conveying powder, spiral conveyor granular and small bulk materials , such as coal, ash, slag, cement , food, etc. , the material temperature is less than 200 ℃. Suitable for

transportation of Yi

Perishable , viscous , industrial conveyor easy caking materials . Mainstream model : LS screw conveyor , there are other types of cement, pipe , stainless steel , vertical, shaftless screw

conveyor .
Screw the technical characteristics :
Simple structure, small cross-sectional size , good sealing , reliable , low cost , ease of loading and unloading the middle , reversible transport direction , while the

opposite can also be transported in both directions . But also on the material during transport stirring , mixing, heating and cooling operations.

By loading gate adjustable material flow . But not transport perishable , viscous , easy caking and bulk materials. Easily broken during transportation of materials , screw and

trough easy to wear. Larger power units . Use and to maintain the tightness of the spiral trough and trough between fitness

When the gap . Composition generally consists of conveyor body material inlet and outlet and the drive unit has three major components ; conveyor helical blade have a physical

spiral surface with spiral blade helicoid surface and the three forms , which vane helical surface application of relatively small, mainly for transporting sticky

And a greater degree of compressibility materials , this spiral face, 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.

There shaftless screw conveyor shaft and the advantages and features

    Screw divided shaft and shaftless spiral , generally there are two forms helical axis , tubular or trough can be divided into two . Here we have different types of screw

machines use the steel roller conveyor advantages and characteristics of the simple description:
    Shaftless screw conveyor can transport traditions shaft screw machines can not or difficult to transport materials, such as granular, high-temperature materials and pasty

materials , semi-fluid Telescoping conveyors and viscous materials , easy to wound and ease of plugging materials. Shaftless screw conveyor with conventional screw machine compared to a shaft , the

use of non-central

Shaft design, the overall use of steel has a flexible auger material , which has the following outstanding advantages : anti-winding resistance. No interference with the central

axis , for the belt -like, easy to wound materials have special advantages.
    Shaftless screw conveyor uses: It is used for conveying sewage treatment plant fine grid , the trash rack spacing of 50mm decontamination machine gate residue and filter

press cake and other materials , good environmental performance .
    A shaft screw conveyor , commonly referred to LS-type screw conveyor , which is driven by the screw shaft rotating helical blades push the material for moving forward in

order to achieve the purpose of transportation , can be set to a plurality of feed points for the material. This screw machine main used in chemical, metallurgical and other

IDM . Spiral sealed transmission, good environmental performance .

Screw conveyor range of applications

    Screw conveyor has been widely used in building materials , metallurgy, chemical , electric power, coal, machinery , light industry , food and food industries , suitable for

conveying powder , granular , small rubber belt conveyor block materials, such as cement, coal , grain , fertilizer, ash , sand and coke . The temperature of the work environment

Degree is generally -20 ° ---- 40 ℃, the temperature of conveying material is generally -20 to 80 ℃, the conveyor appropriate level and small inclination arrangement angle

not exceeding 15 ° is appropriate.

    Therefore, customers in the selection of the conveyor , it is necessary first of all explain what materials and material properties , need to transport the height ( length )

, you can also put forward vertical conveyor a number of other requirements, such as inlet design requirements or the requirements of the discharge port and so on. If the installation process in

the case of

To the problem, you can refer to : Screw mounting technical conditions . Production activities in the client machine using the screw to transport materials and shaker many cases

is supporting the use of , to save manpower, saving time , saving the cost of production effects, such as in the food , chemical , mining

And other industries.
    Screw conveyor has a simple structure , and making low-cost, sealing strong , safe and convenient operation , etc., the middle can be multi-point loading , unloading .

Widely used in chemical industry, building materials, metallurgy , food and other departments in the angle β <20 ° in the case , is not conveying viscosity , non-perishable

, Caking powder, granular and small pieces of material .

Inclined screw conveyor applications in the industry

   Is replaced by the inclined screw conveyor bucket elevator and horizontal screw conveyor composed of joint cement conveying system, as concrete mixing station ancillary

cement weighing hopper of hot water heat exchanger, transportation equipment , and its structure is relatively simple and compact , performance reliable , low cost,

Currently widely used in belt conveyor design the food industry , building materials industry, chemical industry , transportation and other sectors, such as transport cement , chemicals, sand ,

flour, salt and so on. Used in the cement pipes conveying screw conveyor , cement is not easy flying , both to reduce waste, and reduce environmental

Pollution , is a good cement transport equipment.
    Screw on the overload is very sensitive, easy to produce jams , to achieve better delivery status , the pitch of the screw shaft is best to take Helical Blade .

Belt ring expansion sets

Since the late 1950s , drum spokes have adopted variable cross-section structure , between the wheel housing and the shaft has adopted keyless connection , that the ring

expansion sets structure , referred to as gravity conveyor expansion sets makers. Ring expansion sleeve in the structure has been improved continuously , although it is not widely used , but the

development point of view,

It should still be promoted. Belt Ring gravity skatewheel conveyor Expansion sets of Z1-Z5 total of five kinds , with the following characteristics :
1, the transmission torque evenly, so that the shaft reasonable force can be smaller than the bond connecting shaft section .
2 , single-cylinder assembly , axial positioning adjustable , removable and easy maintenance.
3 , the cylinder can be improved manufacturing process , reduce the wheel housing and the shaft machining accuracy.
4 , due to the cancellation of the keyway , the shaft groove sections not weakened, thus reducing stress concentration coefficient.

Technical Analysis belt abroad

Conveyor is widely used in a variety of modern industrial enterprises , the development trend of the conveyor so as to be understood by us . Now , the special machinery for your

brief introduction about the advantages of Extendable conveyor the conveyor belt at home and abroad for development and application .
First, the domestic belt conveyor technology status
Our manufacturing conveyor varieties, many types . In the "Eighth Five- Year" period, through the national one-stop " 10 000 t mining equipment ," implementation of the project

, conveyor technology has been greatly improved , coal mine with high-power, long distance belt conveyor

The key technology research and development screw conveyor of new products Lu have made ​​great progress. Such as large- angle distance belt conveyor equipment , high efficient working face

telescopic belt conveyor etc. to fill the gap , and the key technology of the belt conveyor to reduce its main component parts

The theoretical research and product development , successfully developed a variety of soft start and braking device and PLC as the core of the programmable electronic control

devices , variable speed drive system uses hydraulic coupling and planetary gear reducer.
① continue to large-scale development . Large transmission capacity , including large-scale , large single length and large transmission angle and other aspects. Hydraulic

conveyor length reached 440 km or more. Belt conveyor length of nearly 15 km single , and has appeared composed by a number of Taiwan Contact and B two

Land of the " conveyor belt road ." Many countries are exploring long-distance, large capacity continuous transport of materials better conveyor structure .
② to expand the use of the conveyor . Developments in high temperature , low temperature , corrosive , radioactive , flammable substances in the work environment , as well as

capable of delivering fiery , explosive, Pellet , sticky material conveyor.
③ the conveyor structure to meet the automated material handling system to control stand-alone asked for. As used in automated sorting post office parcel trolley conveyor

sorting operation should meet the requirements.
④ reduce energy consumption in order to save energy , the field of conveyor technology has become an important aspect of research . Has one ton material handling energy

consumed by one kilometer conveyor selection as one important indicator .
⑤ reduce all kinds of conveyors in operation generated dust, noise and emissions .
Second, foreign conveyor technology status
Foreign conveyor technology has developed rapidly, which is mainly manifested in two aspects: one is functional diversification of belt conveyor , the application range

expansion, such as high- angle belt conveyors, tubular belt conveyors, space turning belt conveyor and other models ; hand

Is the belt itself has made a huge technology and equipment development, especially long-distance, large-capacity , high- speed and other large conveyor belt has become the main

direction of the development of its core technology is the development and application of a belt conveyor dynamic analysis and monitoring technology to improve the belt conveyor

Machine operating performance and reliability. Abroad has been designed for use or has been a few typical distance belt conveyor conveyor line .  1, Spain, Western Sahara is

the world 's longest conveyor line long distance conveyor line , the line up to 100km, with two and a half hours

Built and put into use in 1972 , used to rocky plateau in cloth . Carat apatite ore open pit transported Yi Era Yong harbor. The total investment amounted to two hundred million

marks . The line is expected to be able to reach the line for 30 years, the average annual transport capacity of 10 million tons of apatite ore (2000t / h

) . The entire line by the length of 6.9 ~ 11.8km conveyor consisting of 11 units . Bandwidth l000mm, using ST3150 -type steel cord belt , a belt speed of 4.5m / s.  2, just

that mine 20km ground conveyor belt system to represent the level of development of a modern transport

Line . The delivery system consists of a length of 10.3km flat cornering and a 10.1km line conveyor belt long form . Turning radius of curvature of the belt conveyor 9km  arc

length 4km. Two conveyor line parameters, in addition to other parameters are the same   transport capacity

Of 2200t / h  Bandwidth 1050mm  belt tensile strength of 3000N/mm  safety factor of 5  tensioning device for the hammer taut. Allow stroke 25m, driven by three sets

700KW DC motor, double drum drive . System uses an advanced technology manufacturing and installation of roller , horizontal

Turning technology and dynamic analysis techniques.  3,15.6 km horizontal bend cross conveyor and put into use in 1996 , is the world 's longest single belt conveyor . The

conveyor will ZISCO of NewRippleCreek mine through secondary crushing of iron ore shipped to Zimbabwe

Steelworks nearby. Transport capacity of dry ore 500t / h, wet ore 600t / h. System length of 15.6km, material lifting height of 90m. Recent years, China 's large belt conveyor

design, manufacturing has also been considerable progress.
From the late 1960s has been the production of more than 200 steel cord conveyor in coal, phosphate , iron ore and port to use . Length up to 7602m where a large single belt

conveyor has been put into use. Currently, including the length of the conveyor line l0km and several other long-distance band

Conveyor systems are being designed or planned .

Belt conveyor operation and maintenance Third

Maintenance of belt conveyors
1 day, check that the drive motor and reducer is abnormal;
2, check the belt is loose every day, and timely adjustments;
3 monthly checks whether the elongated conveyor belt, and timely adjustments;
4, the monthly check drum rotation is flexible, and timely repair;
5, the monthly check drive sprocket and chain of goodness of fit, adjust, and add the oil to the chain;
6 month control box with an air gun blow off Flexible skatewheel conveyor the dust, to prevent failure;
7, reducer after the first 100 hours of use to replace the cleaning internal gear oil, put new oil after every 2500 hours and then replaced once;
8, major maintenance once a year to check the extent of damage accessories.

2 gear off the chain: one, the chain is Extendable conveyor too long 2, the gear off the chain off, screw loose.
1, the chain chopped reassembly good deployment. 2, re key Shang Hao, matter eliminated.

2 belt slip: 1, belt adjustment is not good, too loose two belt is too long
A good tune belt tightness 2, increasing compaction roller deployment

2 belt ran: 1, poor deployment of drum 2, the re-commissioning roll angle

2 Transmission with sound: one, the chain does not teeth; 2 bearings in oil
1, chain wheel straightening 2, bearing oil

Customized conveyor should pay attention to the parameters

Generally based on the requirements of material handling systems, material handling location of a variety of conditions, the production process and material characteristics to

determine the main parameters.

① Transmission capacity: conveyor Flexible Roller Conveyor transport capacity per unit time is the amount of material transported. In transport bulk materials, transportation of materials per hour mass

or volume calculations; during transportation into items, the number of pieces per hour transport calculations.

② Conveyor speed: increase transmission speed can increase transmission capacity. In order to make the traction belt conveyor length pieces and large, the conveying speed

increasing day by day. But high-speed powered roller conveyor operation of the belt should pay attention to vibration, noise, and start braking and other issues. For parts of the chain as a traction

Conveyors, conveyor speed should not be too large to prevent increased dynamic loads. Simultaneous process operation conveyors, conveyor speed production process requirements

should be determined.

③ component size: scantling including conveyor belt width, belt width, hopper volume, pipe diameter and vessel size. These have a direct impact scantlings conveyor conveying

capacity.

④ transport length and angle: transfer line length and inclination of the conveyor directly affect the size of the total resistance and the power required.

Conveyor Introduction

Belt is the most widely used continuous conveyor , belt conveyor is common , it is a closed endless 90 degree conveyor belt carrying member of the traction member and the continuous

conveyor . Belt conveyor with horizontal arrangement , tilting with convex arc type, with concave arc type

And with a concave arc curve type form . Belt conveyor with fixed and mobile two. The former is fixed to the conveyor at a predetermined position on the belt , mainly for the

horizontal direction or the tilt direction of the slope is not continuous transportation of materials, the quality of light can be transported in large

Were pieces of cargo . Mobile conveyor with automated sorting machine walking devices , changes in working position can be moved . Conveyor according to its structure can be divided into ordinary belt ,

new belt .

There are an endless conveyor belt , drive means , tensioning device, various rollers , racks , etc., in which both belt carrying member carrying the goods , there is a transfer

of traction traction member . Belt around the drive rollers and tensioning rollers , idlers and supported in many

On . Work, by the motor through reduction gear , the drive roller to rotate. Relying on friction between the belt and the roller , smooth to drive, the goods transported to the

loading area.

Conveyor layout general requirements: the curve segment , the ban set to , unloading equipment , all kinds of give , unloading device should be placed in the horizontal section

. General layout of the belt tensioning device tension minima . Conveyor arranged in a straight line as much as possible , you should avoid simply furnished security according

to National Cheng Kung University concave terrain

Arc , arc furrow forms .
In the arrangement should note the following :
A segment of the curve , not set up feeding and discharging devices.
B to discharge materials and intermediate segment is preferably provided on the horizontal , but can also be located on the inclined section . When located in the inclined

section , when the discharge point is preferably provided midway in the horizontal section , but can also be placed on the inclined section . Located in the inclined section ,

the midway point of discharge should not exceed 10 ° -20 inclination

°, otherwise easy to swap material .
C If the horizontal segment uniform feeding , and in the turning point of relatively smooth , convex radius of curvature of the appropriate section .
D When the conveyor is needed by the turning angle of the horizontal segment segment , it is best to use several convex arc groove roller carried over , in order to prevent the

material scattered .
E When the conveyor is inclined to horizontal transition section, the radius of curvature of the concave arc should generally be no load on the belt tension and is formed with a

radius of curvature of its own weight , so as not to make the float ribbon in the over- section .

Belt Conveyor Features

Long distance belt conveyor , conveyor force, high productivity , simple structure, less investment in infrastructure , the use of low cost ; transport lines can be horizontal,

inclined arrangement, or re horizontally , automatic checkweigher vertically curved layout, less restricted by terrain conditions ; smooth , easy operation

Safe, reliable, easy to implement automatic control.
When the conveyor belt in an oblique direction , the different materials are different from the maximum inclination angle , when the maximum inclination of the conveyor belt as

the material and not directly to the friction , the material will be generated in the transport belt slippage. Avoid Automatic Sorting Machine material down is a necessary condition , belt transmission

Sending machine is not greater than the inclination angle of friction material on the conveyor belt . However, in practical work, the friction material and conveyor directly

affected by many factors. To ensure normal delivery , to avoid the material down , belt conveyors should be compared with the maximum allowable tilt angle of friction material

on the conveyor belt

Rubbing angle is small 7 ° -10 °.
Belt is the application of one of the most widely used conveyor , belt conveyor is a common ordinary belt conveyor . A mobile, fixed and reversible conveyor frame and

retractable conveyors . Common belt conveyor is mainly used in the horizontal direction or the slope is not

Tilt direction , continuously fed granular goods can be transported in bulk lightweight piece of cargo .
As the conveyor industry, there have been some new belt . Common 's new pressurized conveyor belt , sidewall conveyor waveform , the middle belt driven conveyor, belt conveyor

and inclined belt conveyors .

Steel cord conveyor belt testing

Testing the main content of the following aspects :
1 , the transmission mode and parts structural strength testing
Steel Cord Belt Conveyor with changes in the environment , increase varieties of special materials transportation , as well as new materials , new processes, new technologies

continue to emerge , the device will Extendable conveyor promote continuous improvement . Thus, the need to strengthen the transmission technology equipment and components structural strength

testing , in order to improve product quality

Volume, to improve performance and reduce costs .
2, the main performance parameter determination and improvement
Steel Cord Belt Conveyor The main parameters are: transportation volume , productivity , bandwidth, belt speed , gravity skatewheel conveyor groove angle , length, angle, driving power transmission

efficiency , operating temperature , material density , fragmentation and usage conditions.
3 , Steel Cord Belt Manufacturing Technology Study
Tape drive mechanical joints, strength is poor , generally only the strength of the original tape about 40% , it is difficult to ensure the safety of equipment for continuous

production . Through continuous research and development in recent years has been the ideal connection method instead of vulcanized rubber . Vulcanized rubber connection is

divided into "cold curing " and " HTV " two

Kind . The use of specially configured to transport tape glue linking allows joint strength close to the original tape strength , long life and high reliability. Tape machine

maintenance work in the mines in the use of cold- curing method , the entire bonding process can be carried out at room temperature , can quickly cure.
To meet the large steel cord belt conveyor length , big lift height and large volume requirements , we must improve tape and joint strength . Steel Cord Belt tensile strength

abroad has reached 100000N/cm above , is to 200000N/cm development . High strength adhesive tape , adhesive tape factory will make it

Shorten the length of the joint length ratio increases, uneconomical . Experts believe that the tape strength and stability in 60000N/cm more appropriate. Domestic tape factory

efforts will be necessary .

The working principle of the friction belt conveyor line and characteristics

Friction drive conveyor line is to take a flexible traction member of the flexible drive member ( carrier ) are driven .
Characterized by the driver also generates Flexible Roller Conveyor tensile strain , the driver may be rope or belt , the traction body is a conveyor belt , the carrying belt .
Friction drive apparatus according to the line of action , can be divided into supporting and traction type . Supporting Telescoping conveyors type line driving force of friction drive just to

balance the running resistance of the carrier tape is not output through the carrier tape traction rope traction belt belong to this type , friction drive traction lines

The driving force moving means , not only the running resistance of the carrier tape balanced , but also with the output traction over carrier .