Crane disorderly rope alarm method and device, and crane using the same device

Abstract

The invention discloses a disorder cable alarming method for cranes, comprising steps as follows: S10, acquiring a velocity V1 of hoisting cables at a hoisting place and a velocity thereof V2 at a pulley part on top of a crane arm where the hoisting cables pass through; S20, judging whether a ratio between V1 and V2 is in a zone of disorder cables or not while the crane is just started or stopped and a sensor is free of impacts. Either of the following factors is applied for the judgment of the zone of disorder cables: a ratio between V1 and V2 is equal or greater than two; or a ratio between V1 and V2 is equal or less than 1.5 when a lifting hook is not in a falling state. If in a zone of disorder cables, the step S10 is needed; if not, a step S30 is needed; S30, giving off alarm signals for the disorder cables of the crane. With the disorder cable alarming method for cranes, alarms can be given at the early stage the disorder cables occur, so as to avoid the disorder of hoisting cables in the middle and the late stages, and effectively eliminate the dangers caused by disorder of the hoisting cables. Based on the disorder cable alarming method for cranes, the invention also discloses a disorder cable alarming device for cranes, and a crane with the disorder cable alarming device.

Description

technical field [0001] The invention relates to the field of hoisting machinery, in particular to a method and a device for alarming a crane with a rope disorder, which is especially suitable for use in a car crane. The invention also relates to a crane using the rope disorder alarm device. Background technique [0002] For hoisting machinery that uses ropes to pull objects up and down, rope chaos is a phenomenon that often occurs. The harm of this disordered rope phenomenon is very great, not only accelerates the wearing and tearing of steel wire rope, reduces the service life of steel wire rope, also has the hidden danger of causing major safety accident because of potential broken rope. How to prevent disordered ropes, especially to report to disordered ropes in time, to reduce the harm of disordered ropes phenomenon, is a problem that needs to be solved urgently in the field of hoisting machinery always. At present, there are two more mature solutions to prevent rope ch...

AI Technical Summary

Problems solved by technology

Therefore, when solving the problem of the crane’s messy ropes, the above-mentioned factors must be fully considered, and the technical solution will be extremely complicated to improve the mechanical structure alone, and it will even be difficult to realize its intention of preventing the messy ropes

[0006] At present, the cranes at home and abroad do not have the alarm function of rope disorder, and there is no relevant literature on this aspect.

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