Detector for detecting steel pipe via rare earth permanent magnetism material

Abstract

The invention relates to a detector for detecting a steel pipe via a rare earth permanent magnetism material, and belongs to the field of steel pipe wall thickness measuring and quality defect detection. The detector detects the thickness and pipe wall condition of a detected object according to magnetic field and pressure change between and the detected pipe, early warning is raised against thinning, crack and leakage points in the pipe wall, a mobile device carrier is composed of two independent parts, control is convenient, and the mobile device carrier is arranged in a sealed way to adaptto different detection environments. The detector has the advantages that the detector can realize detection of relatively high precision in a severe pipe environment, early warning is raised againstthinning, crack and leakage points in the pipe wall, the designed mobile device carrier is higher in sealing performance, behaviors are convenient to control the structure is simple and practical, andthe detector is highly practical and economical and can be applied to production practices.

Description

[0001] Technical field: [0002] The invention relates to the fields of steel pipe wall thickness measurement and pipe wall quality defect detection, in particular a pipeline detection device for detecting steel pipes using rare earth permanent magnet materials. [0003] Background technique: [0004] At present, there are various pipelines with different functions and different sizes in urban construction, such as central air-conditioning pipelines, tap water pipelines, gas pipelines, oil (gas) pipelines, heat pipelines, etc. These pipelines need to be inspected and maintained before they are put into use and during use. However, the constraints of narrow space or harsh environment make these tasks both arduous and dangerous. Traditional pipeline inspections are carried out by relevant personnel, with heavy workload and low efficiency. For some toxic or harmful media or pipeline locations with complex and narrow internal structures, personnel cannot reach and monitor. In thes...

AI Technical Summary

Problems solved by technology

However, its detection technology is very difficult to implement in pipelines with media

Ultrasonic flaw detection has restrictions on the shape of the controlled object. It is very difficult to detect ultrasonic flaws when the shape is complex or the surface cleanliness is not high.

In addition, the quantitative and positioning accuracy is poor, and it is difficult to realize mobile flaw detection. At the same time, it is limited by the grain structure and tissue uniformity of the controlled object material.

However, AC and DC magnetization flaw detection and eddy current flaw detection have more stringent requirements on the object to be controlled, and are mainly aimed at shallow surface layer detection, but the actual application is not mature.

Due to the need for AC and DC to magnetize the controlled object, especially for mobile flaw detection, it is very difficult to operate

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