What are the protective devices for belt conveyors used in coal mines?

The protection device of mine belt conveyor is designed by using double bus control mode. Using network communication technology, the operation and fault state of belt conveyor in coal mine are monitored. Compared with similar belt conveyors, its advanced nature, reliability, convenience of operation and energy-saving lamps have been greatly improved.

The protective device of mine belt conveyor is suitable for mines with explosive gas and coal dust, and is used for comprehensive protection and control of belt conveyor. And can also be use for centralized control and protection of chain plate machine.

The power supply execution unit is flameproof and intrinsically safe, rectangular in shape, with 36V( 127v) power supply inlet and relay control contact outlet at the left end; The right end is the outlet of the over-temperature automatic sprinkler control point; On the upper right are 12V/ 1A intrinsically safe power socket and control signal input socket.

The main machine of belt conveyor protection device is composed of flameproof cavity and intrinsically safe shell, and has intrinsically safe executive power supply, intrinsically safe control unit, display operation unit and various intrinsically safe sensors in China Coal Mine.

Various protection functions of protective devices for mine belt conveyors;

1. conveyor belt tear protection: when the conveyor belt is torn, the conveyor belt tear sensor transmits an electrical signal to the host computer, and the host computer immediately realizes the parking protection function.

2. Running deviation protection: When the guide rod of the running deviation sensor deviates from the center line15 5, the running deviation fault protection is realized after a delay of10s 5s.

3. Smoke protection: When smoke is generated, the smoke sensor sends this signal to the host computer to realize smoke protection immediately.

4. Emergency stop protection along the line: When the emergency stop switch along the line is turned on, this product immediately realizes the emergency stop protection function.

5. Speed protection: When the belt conveyor is running, the driven drum is unsafe to rotate. When it continues to exceed 5- 10S, the delay of the low-speed fault alarm signal is kept at about 2s1s..

6. Temperature protection: When the temperature of the monitoring point exceeds the set temperature of the temperature sensor (+80℃), this product can realize temperature fault protection immediately.

7. Coal stacking protection: When the guide rod of the coal level sensor deviates from the center line by 45 5, it will be delayed by 13 seconds to realize fault protection shutdown.