Suspension type magnetic flux leakage detection module

Abstract

The invention provides a suspension type magnetic flux leakage detection module, which comprises a magnetic flux leakage detection mechanism used for detecting pipe wall defects; and the magnetic fluxleakage detection mechanism is connected with a detector bracket through a suspension connection mechanism. The suspension connection mechanism is used for enabling the magnetic flux leakage detection mechanism to float inwards and outwards along with the change of the pipe diameter. According to the suspension connection mechanism, the magnetic flux leakage detection mechanism can realize the actions of hole shrinkage and opening recovery, so that the detection box can be attached to a detected surface as much as possible, and the detection precision is improved; the detection box utilizes an auxiliary suspension mechanism to further improve the fitness between the detection box and a detected surface, so that the detection precision is further improved; and the configured rollers can reduce the advancing resistance, so that the detection energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of in-pipeline detectors, in particular to a suspended magnetic flux leakage detection module. Background technique [0002] Pipelines are an important way of long-distance transportation of oil and natural gas. Pipelines work under high pressure, long distances, and harsh external environments. Due to various reasons such as transmission medium corrosion, stress, construction damage, and natural disasters, various defects will occur on the pipe wall. , These defects are very harmful to the safe operation of the pipeline, and early detection of defects is an important means to guide pipeline maintenance work and maintain pipeline integrity. At present, the most common in-service detection method for pipeline defects is the in-pipeline detection technology, especially the magnetic flux leakage detection technology. [0003] Flux leakage detection means that after the ferromagnetic material is magnetized, a l...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing variable-diameter magnetic flux leakage detectors only realize the variable-diameter function in the walking mechanism, guiding mechanism and other parts. When in use, the detection mechanism is still fixed with the detector bracket. Therefore, when the diameter of the measured object changes, the magnet module The distance from the surface to be tested also changes accordingly, thus changing the closed magnetic circuit formed by the magnet, tube wall, and magnetic permeable module. In this way, the detection accuracy of the detection box is greatly reduced

Images