How to control the conveying speed of the conveyor

Conveyor speed control
To prevent speed variation caused by belt conveyors, bucket elevators, screw conveyors and feeders and other damage, you need to set the safety switch. Due to overloading, belt

slippage or fracture occurring at a rate change, the switch should perform two functions, namely cutting system startup sound

Light alarm.
Speed ​​switch shaft through flexible coupling shaft connected with the conveyor for measuring conveyor rpm. At any speed setpoint changes increase or decrease in both the

switching action. As a typical system, when the drag chain conveyor speed changes will stop functioning, warning lights

Or start flashing alarm. Speed ​​switch can simultaneously perform multiple functions.
Speed ​​switch can use the following three modes.
Speed ​​reduction detection: detection speed should be set below the normal operating speed, when the operating speed drops below the set value, the output relay is de-energized.
Speed ​​detection: the detected speed should be set above the normal operating speed, when the operating speed exceeds the set value, the output relay is de-energized.
Zero speed detection: When the operating speed is close to zero (half turn per minute), the output relay de-energized.

Emergency stop
For most of the conveyor system, have a stop button for emergency stop in case of emergency. For longer conveyors, which normally takes along its entire length rope emergency

stop switch, start button will only be installed in the main control board.

System Control
Delivery system can be operated with a manual control (in the test or automatic control malfunctions during use) or by automatic control, automatic control available electrical,

electronic or pneumatic.
Control system design must be able to meet the operational requirements. Open to stop the program, interlock, time and records must meet the technological changes in the change.

Stop when troubleshooting system can operate independently of local disconnect. Most bulk solid materials conveying systems are used to make the system delay relay

In order to stop or start. System startup are generally in the control room.
Conveyor system must be set up between the devices in the cell electrical interlock. Set in the power control system electrical interlock, can any one conveyor system

malfunction or stop, it can automatically stop all feeding conveyor, also can ensure that before the start of either a conveyor, which

The pick conveyors are in operation.
When the material reaches a predetermined height of material level, the system will automatically cut off; stop the star feeder; were stopped No.1, No.2, No.3 belt, over a

certain time interval after stopping to ask valve dust device fan.
Closed the entire running motor by detecting switch control, electrical interlock, so that all devices in any one accident shut down will stop to the raw material silos. Silo

material material level reaches the upper or lower limit and an alarm.