Electric hoist overhead crane must have relatively perfect safety device

When the electric hoist bridge crane is in operation, in order to ensure its safe operation, some safety devices would be installed, the crane is equipped with a relatively perfect safety device, so that it can play a protective role in other cases.

1. Boom expansion safety device: If there are other circumstances, the high pressure hose in the boom expansion cylinder circuit bursts or is cut off, the balance valve in the hydraulic circuit will start to lock the working oil from the lower chamber of the cylinder, so that the crane will retract itself to ensure the safety of the operation;

Electric hoist bridge crane

2. The relief valve in the hydraulic system: it can inhibit the abnormal high pressure in the circuit, so as to prevent the damage of the hydraulic pump and the motor, and can prevent the overload state;

3. Boom amplitude changing safety device: If there are other circumstances, the high pressure hose in the boom amplitude changing cylinder circuit is cut off or burst, the balance valve in the hydraulic circuit can play a role in locking the working oil from the lower chamber of the cylinder so that the boom will not fall to ensure the safety of the operation;

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