People often say that the plan cannot catch up with the changes. The crane manufacturers have considered various faults and various undesirable factors in the design and development of cranes and improved and improved them, but we still have various kinds of cranes when we use them. Problems and failures.
For example, we are using cranes to lift goods, suddenly the crane fails, so we do not pay attention to the safety of lifting equipment? If there is no solution to the failure of the crane or other factors, it will easily lead to crane damage, and even lead to large-scale safety accidents.
What should we do when the crane suddenly fails?
The controller did not stop correctly at zero when parking. At this time, the brake solenoid did not lose power and the crane did not stop. However, the driver mistakenly believes that he has “stopped,” so he thinks that the rapid drop in load at that time is a brake failure.
The incorrect method of manipulating the controller handle is the root cause of this situation. Drivers lacking practical experience are not likely to find the cause of this situation quickly. Because the cause of the “fake-to-failure” brake has been eliminated after a point-in-vehicle or anti-vehicle operation.
When the down contractor of the PQR6402 control panel with two stages of reverse brakes fails to close, when the reverse brake stage is switched to the regeneration downgrade, the brake contactor is closed (the brake is released). The motor is not powered, so the hook will fall freely.
In this case, stop immediately. This kind of free fall of the hook is usually called the brake “failure.” However, it occurs when the controller is in the regeneration down position and the controller does not exist after the controller has returned to zero.
In the event of a sudden brake failure, a point or reverse operation should be performed immediately. After the point-and-vehicle operation and the anti-vehicle operation, if the failure condition persists, it shall take effective and maneuverable emergency measures and issue a warning signal according to the situation at the time of the object.
If the work is close to the ground and there is no danger of falling, put the brake on the last block of the descent and use the normal method of operation to put the desired item down. It is not allowed to fall freely.
If the object is dropped directly in the original position and it will cause an accident, it is necessary to take the opportunity to open the anti-vehicle and turn the controller handle step by step to the last step in the ascending direction (pay special attention. Do not turn the control handle all of the time. The last file will cause the overcurrent relay to operate because of the excessive speed.
Tips to fix them
While turning the controller handle in the ascending direction, according to the specific situation, the size of the car (or torsion bar) is opened to a safe position and the object is dropped. When taking the above-mentioned measures, if it is raised once and the car (or torsion bar) cannot be driven to a safe position, it must be raised and lowered repeatedly.
When the hoisting mechanism controls the controller to return to zero, the hook cannot stop moving. This is called a brake failure. The sudden failure of the brake will cause the hook to fall rapidly, leading to major equipment accidents and personal accidents.
Each driver should have a high sense of responsibility, pay attention to pre-check pre-repair, to prevent the sudden failure of the brake accident. When the brake suddenly fails, the driver should calmly and calmly take reasonable measures to minimize or eliminate possible accidents and losses.Each driver should have a high sense of responsibility, pay attention to pre-check pre-repair, to prevent the sudden failure of the brake accident. When the brake suddenly fails, the driver should calmly and calmly take reasonable measures to minimize or eliminate possible accidents and losses.