Method for detecting breaking strand or wire of wire rope

Abstract

The invention relates to a method for detecting a breaking strand or wire of a wire rope used for lifting machinery, mine machinery and elevator industry, in particular to a method for detecting a breaking strand or wire of an elevator traction wire rope. The method comprises the following steps: a guiding apparatus is installed in a working path of traction wire ropes, so that there is a fixed gap between adjacent traction wire ropes when the traction wire ropes pass the guiding apparatus; a digital camera is used to take pictures of the traction wire ropes with the fixed gap at fixed times and to save the pictures; the pictures are subjected to gray scale processing to obtain gray scale image matrices; the numbers of pixel grids of the gray scale image matrices of the pictures taken at fixed times are compared with a grid number critical value; and when the numbers of the pixel grids are greater than the grid number critical value for no less than 5000 times, an alarm is given. The invention aims to provide a novel elevator traction wire rope detection method different from conventional electromagnetic detection methods.

Description

technical field [0001] The invention relates to a detection method for steel wire ropes used in hoisting machinery, mining machinery, elevator industries, etc., in particular to a detection method for broken strands and broken wires of steel wire ropes for elevator traction. Background technique [0002] Steel wire rope is widely used in various fields. It has the advantages of high strength, good flexibility, light weight and stable operation. However, in the long-term use of the steel wire rope, deformation and constant wear and tear will inevitably occur. Under normal elastic deformation, the steel wire rope can still be used normally; when the steel wire rope is overloaded, used for a long time or damaged by external factors, etc., resulting in permanent plastic deformation, the wire rope will break and the strands will be broken, resulting in a decrease in its strength; if If it is not dealt with in time, the overall fracture of the steel wire rope will occur, which wi...

AI Technical Summary

Problems solved by technology

However, in the long-term use of steel wire rope, it is inevitable to produce deformation and continuous wear and tear.

Under normal elastic deformation, the steel wire rope can still be used normally; when the steel wire rope is overloaded, used for a long time or damaged by external factors, etc. to produce permanent plastic deformation, the wire rope will break and the strands will be broken, resulting in a decrease in its strength; if If it is not dealt with in time, the wire rope will break as a whole, which will cause the risk of major vicious accidents