We still have various problems and failures when we get the crane to use. The crane failure is to be solved. For example, we are using a crane to lift goods, suddenly the crane fails and so on. When we get the crane to use, there are still various problems and failures. The crane failure is to be solved. For example, we are using a crane to lift goods, and suddenly the crane fails. In this way, don't we pay attention to the safety of the lifting equipment? If there is no solution to the failure of the crane or other factors, it will be easy to damage the crane, and even lead to medium and large safety accidents. So how do we solve the problem when the crane suddenly fails? 1. Operation error The controller does not stop to the zero position correctly when stopping. At this time, the brake electromagnet was not powered off, and the crane did not stop. However, the driver mistakenly believed that he had 'stoppedThe incorrect method of manipulating the controller handle is the root cause of this situation. Drivers who lack practical operating experience cannot easily find the cause of this situation quickly. The reason for the 'false failure' of the brakes has been eliminated after the start or reverse operation. 2. Contactor failure. When the descending contactor of the PQR6402 control panel with two-stage reverse brake has a failure that cannot be closed, when the reverse brake stage is switched to the regenerative descending stage, the brake contactor is closed ( The brake is released), and the motor is not energized, so the hook will fall freely. In this case, stop immediately. This kind of free fall of the hook is usually called 'false failure' of the brake. But it happens when the controller is in the regenerative down position, and after the controller is pulled back to the zero position, the failure situation does not exist. 3. Brake failure. After the brake fails suddenly, a turn-on or reverse operation should be performed immediately. If the failure situation continues to exist after the car is turned on and the car is reversed, effective emergency measures should be taken according to the situation of the object at that time, and a warning signal should be issued. If the work object is close to the ground and there is no danger of falling, you should turn the brake to the lower gear and use the normal operation method to put down the required object. It is not allowed to fall freely. If you drop the object directly in the original position will cause an accident, you must immediately drive the reverse car, and turn the controller handle to the next gear in the ascending direction step by step. The latter gear, because the action is too fast, the overcurrent relay will act). While turning the controller handle to the ascending direction, according to the specific situation, the big and small cars (or torsion bar) should be driven to a safe position, and the object should be dropped. When taking the above-mentioned measures, if you ascend once, the big or small car (or torsion bar) cannot drive the car to a safe position, so you must repeatedly raise and lower it once or twice. The condition that the hook cannot stop moving after the hoisting mechanism controller is pulled back to the zero position is called brake failure. The sudden failure of the brake will cause the hook to drop quickly, leading to major equipment accidents and personal accidents. The troubleshooting of the crane fault requires every driver to pay attention to pre-inspection and pre-repair to prevent the sudden failure of the brake. When the brake suddenly fails, the driver should be calm and calm, and take reasonable measures to minimize or eliminate possible accidents and losses.