The failure of the whole electric single beam crane to start is a fault that may be encountered in production. Yuantai Crane has sorted out several possible reasons and solutions for everyone:
The power supply is not closed or the power supply lacks phase
Poor contact of collector
The phase relay works, making the mechanism unable to operate normally
Poor contact of emergency stop switch
Contactor fails to complete self-locking
The control circuit is broken
Troubleshooting:
Check whether the power supply is switched on and has few phases
Check or replace the current collector
Exchange any two phases in the power supply
Check whether the emergency stop switch is intact and whether the wireless connector is loose
Check whether the self-locking circuit is normal
Replace the control line
Fault problem: the crane and trolley of electric single girder crane cannot be started, and the crane still moves towards the limit after limit
Failure cause:
There is a problem with the control circuit of the cart and trolley
The crane control limit line is inversely connected
Resolvent
Check the control circuit of crane and trolley
Replace the crane limit control line
When the electric single beam crane encounters a fault, it is necessary to find the correct solution according to the cause, eliminate the fault in time, and reduce the impact on enterprise production
Event 1:
In the process of lifting, the power is cut off suddenly, and it cannot be recovered in a short time, and the motor is burnt, so that the heavy objects cannot be put on the ground.
Handling method:
Install steel wire rope on the main beam of the crane, and slowly lower the weight with chain block
Event 2:
During the lifting process, the motor cannot work because the contactor is burnt or the control line is broken, and the heavy object is suspended in the air.
Handling method:
Find a cable as a temporary power supply. One end is connected to the lifting motor, and the other end is connected to the temporary power supply. Adjust the positive and negative rotation of the motor, and slowly put down the heavy objects.
Event 3:
When lifting heavy objects, the brake suddenly fails and cannot bear heavy objects.
Handling method:
While inching the lifting button, start the cart and trolley to make the weight fall to a safe place.
Event 4:
When the handle cannot control the mechanism and the mechanism is still running.
Handling method:
Before driving, please observe the environment, find the driving power switch, and disconnect the switch in case of emergency.
Routine maintenance of crane
During the operation of the single beam crane, the rotating and relative moving parts of the crane and the electric control system shall be checked at any time. If there is abnormal sound and vibration, the fault shall be eliminated in time.
The enterprise shall regularly check the lubrication and wear of the single girder crane, check the operation of the motor and reducer, and regularly clean and lubricate. Parts with serious wear shall be scrapped and replaced with new ones.
