Follow-up wire rope flaw detector

Abstract

The invention relates to the technical field of steel wire rope non-destructive testing, and discloses the testing principle and internal structure of the follow-up flaw detector. In order to keep the lift-off value between the detection element and the steel wire rope within a reliable range, the present invention is provided with a follow-up device. The follow-up device is a split structure and is symmetrical up and down. The structure of the follower device includes: follower pulley, chute support frame, circuit support, elastic plate and other structures. The working principle is: when the steel wire rope swings in the flaw detector, the steel wire rope directly pushes the elastic plate and the circuit support, and the circuit support is supported by the chute. The radial movement in the frame, at this time, the spring compression buffers the thrust generated by the steel wire rope. Since the distance between the two circuit supports is kept fixed by the intermediate tension link, the lift-off value of the Hall element and the steel wire rope remains within the specified range. The invention has the advantage that the error between the Hall element and the calibrated lift-off value can be adjusted in time for the dynamically oscillating steel wire rope, which overcomes the problems of missed detection and wrong detection caused by the excessive deviation of the steel wire rope in the past.

Description

technical field [0001] The invention relates to the technical field of dynamic non-destructive detection of steel wire ropes, in particular to a steel wire rope detection technology method whose lift-off value can be adjusted accordingly. Background technique [0002] Steel wire rope has many advantages such as high tensile strength, light weight, good elasticity, stable and reliable work, and strong ability to withstand dynamic load and overload. sector is widely used. However, as a kind of engineering load-bearing equipment, steel wire rope is often affected by complex working conditions and environments such as bending fatigue, wear, alternating loads, mechanical impact and corrosion during operation. There are potential safety hazards due to corrosion and other phenomena. Its damage and carrying capacity are directly related to personnel and production safety. [0003] Therefore, in order to ensure the safe and reliable operation of steel wire ropes, experts and schol...

AI Technical Summary

Problems solved by technology

[0004] Among the currently existing steel wire rope detection instruments, most flaw detectors do not have a better solution to the swing of the steel wire rope, such as the utility model patent "Portable Wire Rope Detection Device" (CN208313892U) and the utility model patent "Wire Rope Detector Components" (CN207163809U) ), a large number of on-site data show that when detecting a dynamically running steel wire rope, the wire rope will be greatly affected by the radial distance of the steel wire rope relative to the flaw detector due to the jitter generated by the wire rope being drawn around the wheel shaft at the sheave and the external force when the wire rope is running. In order to make the lift-off value of the steel wire rope relative to the detection element unstable, resulting in problems such as poor detection accuracy or no signal detection

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