System and method for safety monitoring control of crane brake

Abstract

The invention provides a system for safety monitoring control of a crane brake, and belongs to the technical field of crane control. The system comprises a collecting device, a transmitting device, aprogrammable logic controller (PLC), a lifting mechanism and a warming device, wherein the collecting device is used for collecting the amount of compression of a brake spring during brake releasing;the transmitting device is used for transmitting the collected amount of compression of the brake spring during brake releasing, and the elongation of the brake spring during brake contracting to theprogrammable logic controller; the programmable logic controller is used for controlling the lifting mechanism to stop and lift when the amount of compression during brake contracting is equal to thesum of the limit compensation stroke and the lifting height of a push rod, and transmitting a preset warning signal to the warning device; and the warning device is used for warning when a brake pad is seriously worn. The system can monitor the wearing condition of the brake pad of the brake by collecting the amount of compression of the brake spring of the brake, can drive and stop the crane to lift according to the wearing condition of the brake pad, and reminds a worker of timely replacing the brake pad when the wearing condition of the brake pad is serious.

Description

technical field [0001] The invention relates to the technical field of crane control, in particular to a system and method for safety monitoring and control of crane brakes. Background technique [0002] Cranes are indispensable equipment in the modern industrial production process. In order to adapt to various complex working environments, designers will install safety devices in each mechanism of the crane to reduce the accident rate in the production process. [0003] As one of the important safety devices of the bridge crane, the brake controls the moving speed of the heavy objects up and down. In the process of frequent braking, the continuous friction between the brake pad and the brake wheel will inevitably cause wear and reduce the braking torque. [0004] In order to reduce unnecessary trouble and waste caused by frequent replacement or adjustment of brake pads, most brakes at home and abroad are now equipped with automatic compensation devices. But the stroke tha...

AI Technical Summary

Problems solved by technology

However, the current automatic compensation device of the brake can compensate for a limited stroke. When the limit stroke is reached, that is, if the lifting height of the push rod is less than 5mm, the crane lifting mechanism will lose the braking torque.

[0005] For the safety hazard that the crane hoisting mechanism loses the braking torque after the automatic compensation stroke exceeds the limit stroke due to the wear of the brake pads, at present, most of the brakes are installed with multiple sets of brakes. When one brake fails, another brake is used. Emergency braking; this braking method is intuitive and effective, but the multi-installation of brakes and brake wheels will greatly increase the manufacturing cost and maintenance cost of the crane, and at the same time affect the volume mechanism of the crane lifting device, and the entire lifting device will appear more cumbersome

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