On-line magnetic flux leakage detection probe for steel wire rope

Abstract

The invention belongs to nondestructive detection technology for magnetic flux leakage of a steel wire rope, relates to an on-line magnetic flux leakage detection probe for the steel wire rope. The on-line magnetic flux leakage detection probe comprises an open-close magnetic flux leakage detection assembly and a floating track mechanism. The floating track mechanism comprises a pedestal, a change-over base, a first linear guide rail, an installation plate, and air cylinder and a second linear guide rail. The magnetic flux leakage detection assembly realizes real-time tracking for the postures of the steel wire rope through the floating track mechanism. The floating track mechanism can realize cohesion detection and opening restoration for the steel wire rope. The detection probe provided by the invention integrates the functions of magnetization and signal output, has the advantages of small size, light weight, strong universality, low cost and the like, and can be suitable for some to-be-detected components with large swing amplitude and fast speed change. The probe is in a split structure but can form a through type probe during a work process, has the effect close to that of through type solenoid coil magnetization, and particularly can realize the nondestructive detection requirements of components such as end-free or two-end anchorages and the like under the conditions of high speed and large swing.

Description

technical field [0001] The invention belongs to the field of non-destructive testing, and is especially aimed at the online non-destructive testing of high-speed running steel wire ropes, and is a detection probe capable of tracking the high-frequency swing of the steel wire ropes in real time. Background technique [0002] Construction machinery such as steel wire ropes (steel cables) for hoists produce alternating high-amplitude swings under alternating loads during high-speed operation, and it has always been a difficult problem to implement online nondestructive testing for them. The traditional magnetic bridge road type steel wire rope detection probe forms a strong magnetic adsorption effect due to the U-shaped magnetic pole (leg) being close to the steel wire rope to be tested. In addition, its yoke structure also makes its size and weight too large. When detecting high-speed alternating high-amplitude swinging wire ropes, there will be a huge destructive interaction ...

AI Technical Summary

Problems solved by technology

The traditional magnetic bridge road type steel wire rope detection probe forms a strong magnetic adsorption effect due to the U-shaped magnetic pole (leg) close to the steel wire rope to be tested. In addition, its yoke structure also makes its size and weight too large

When detecting high-speed alternating high-amplitude swinging steel wire ropes, there will be a huge destructive interaction due to the strong magnetic adsorption force and inertia. At the same time, the strong magnetic adsorption force is also not conducive to automatic detection actions such as the detection of the probe’s sheathing and leaving the wire rope. The realization of this kind of detection probe eventually led to the classification of portable manual detection instruments, which can only be adapted to the detection of off-line wire ropes, but can’t do anything to the online detection of alternating high-amplitude swinging wire ropes.

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