Crane security protection system and crane thereof

Abstract

The invention discloses a safety protection system for a crane, comprising a plurality of sensors, a controller and a protection action actuating mechanism. The sensors detect and transmit the workingstate of the crane to the controller in real time; according to the detection data of the sensors, the controller calculates maximum allowable load determined by the characteristics of the crane under the current working state; the determined maximum allowable load is compared with the maximum allowable load related to the characteristics of the crane, then a minimum value therein is taken, and after predetermined design margin is taken, a rated working load G is obtained; according to the data of the sensors, current actual lifting weight is obtained through calculation; the actual lifting weight is compared with the rated working load, and if the actual lifting weight exceeds a preset safe range, the controller sends out a safety protection control signal limiting the crane to move toward the dangerous direction; and the protection action actuating mechanism limits the crane to move toward the dangerous direction according to the safety protection control signal. The invention provides a crane using simultaneously the safety protection system.

Description

technical field [0001] The invention relates to crane safety technology, in particular to a crane safety protection system. The present invention also provides a crane using the above system and method. Background technique [0002] Cranes are commonly used construction machinery, and their main function is to lift heavy objects. Cranes all have booms that can be lifted and rotated, and most of the booms are telescopic booms. When performing lifting operations, the crane boom needs to bear the weight of the heavy object at its front end, and the position of the heavy object to be lifted is generally well outside the confines of the crane chassis. Due to the above reasons, the weight of the lifted heavy objects has a great influence on the safety of the crane. First of all, when the weight of the heavy object is too large, it may exceed the bearing capacity of the crane boom, causing the crane boom to break; secondly, the moment generated by the heavy object will generate ...

AI Technical Summary

Problems solved by technology

This selection method causes the working capacity of the crane to not be fully utilized

[0011] Secondly, with the above-mentioned existing technology, there is a significant jump in the rated working load, which increases the difficulty of handling the crane

Also according to the above example, when the arm length of the crane is 10.3 meters, it can choose 25500kg as its working load. Once it exceeds 10.3 meters, it must choose 15000kg as its rated working load. The arm length often changes at the same time, and the above-mentioned jumping makes the operator often at a loss, causing difficulty in control

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