What are the contact protection devices for non-crushing hoists

The non-crushing elevator is a continuous conveyor that uses a series of hoppers evenly connected to the ring-shaped traction member to lift the material vertically. It is divided into three types: loop chain, plate chain and belt. It is suitable for lifting and feeding of food, medicine, chemical products, screws, nuts and other products. It can control the automatic stop and start of the machine through the signal recognition of the packaging machine. Therefore, in order to ensure the safe use of workers, what electric contact protection devices are there for non-crushing hoists?

1. Brake oil pressure overvoltage protection relay contacts: When the brake oil pressure is overpressured, the oil pressure relay contacts are closed. On the one hand, it emits a light signal, and on the other hand, the normally closed contacts in the AC circuit are opened.

2. Power brake voltage-loss relay contact: When the controllable power brake power supply has no voltage or the voltage is too low, the contact is disconnected.

3. Loss of flow protection relay contact: used for disconnection protection of depth indicator automatic angle machine. When disconnected, the car contacts are opened.

4. Overroll switch contact: disconnected when rolling the lifting container. One set is installed on the derrick and the other is installed on the depth indicator, which has the same function. In addition, there is a winding reset switch, which is touched to short-circuit the opened winding lifting device, thereby connecting the AC circuit and releasing the safety brake to reduce overvoltage. Roll container. After restoring the container to its normal position, it should be disconnected in time, otherwise the anti-tipping protection will be lost.

5. Contact of brake shoe wear switch: When the brake shoe is excessively worn, the contact is disconnected.

6. Auxiliary contact for oil cap opening: When the main circuit over-current, father or other reasons cause the high-voltage circuit breaker to trip, at the same time disconnect the safety pumping contactor, the hoist safety brake.

The above is the content about the non-crushing hoist that I want to share for you today. If you want to know more related content, please continue to pay attention to the official website of Yongming Machinery. See you next time!