Crane's hook safe operation control method, device, system and crane

Abstract

Relating to the technical field of hoisting machinery, the invention discloses a crane's hook safe operation control method, a device, a system and a crane to improve the safe reliability of crane operation. The system includes: a crane's lifting mechanism and a lifting gear setter; a height detector, which is used for detecting the hook height; a control instrument, which is in signal connection with the lifting mechanism, the lifting gear setter and the height detector respectively and is used for acquiring a current running speed of the hook according to the corresponding relation between the hook height and the current running speed of the hook. When the current running speed of the hook is out of a gear permissible speed range corresponding to hook operation, a suspended load locking signal is output to the lifting mechanism to control stop of the hook.

Description

technical field [0001] The invention relates to the technical field of hoisting machinery, in particular to a method, device, and system for controlling safe operation of a hook of a crane and the crane. Background technique [0002] When the lifting equipment is in operation, dangerous accidents such as overspeeding and falling of the hook often occur, and may even cause property damage, casualties and other accidents. Therefore, when the lifting equipment is in operation, it is necessary to carry out corresponding safety control on the operation of the hook , in order to improve the safety of lifting equipment operation. [0003] For the safe operation control of the hook, in the prior art, an encoder or a proximity switch installed on the reel of the hoisting mechanism is usually used to detect the speed of the reel, and the detected reel speed is sent to the overspeed controller. Reel speed limit protection prevents it from exceeding the maximum speed. However, the inv...

AI Technical Summary

Problems solved by technology

However, the inventors of the present application found that this method relies on the detection value of the drum speed by the encoder or the proximity switch, the installation requirements of the encoder and the proximity switch are relatively complicated, and the detection accuracy of the encoder is easily affected by the error of the mechanical clearance. The sensing area of ​​the proximity switch is susceptible to interference, resulting in low speed accuracy of the detected reel, and because the encoder and the proximity switch cannot directly respond to the running speed of the hook, it is still possible to appear due to the overspeed of the hook Safety accidents caused by falling operation

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