A detection device for detecting steel pipes using rare earth permanent magnet materials

Abstract

The invention relates to the fields of steel pipe wall thickness measurement and pipe wall quality defect detection, in particular to a pipe inspection device for detecting steel pipes using rare earth permanent magnet materials. The pipeline detection device uses the magnetic field change and pressure change between the detection device and the measured pipeline to detect the thickness of the measured object and the condition of the pipe wall, so as to realize the prediction of the thinning of the pipe wall, the crack of the pipe wall and the leakage point of the pipe wall Warning, the mobile device carrier is composed of two independent parts, which is easy to control, and the mobile device carrier adopts airtight settings to adapt to different detection environments. The beneficial effects of the present invention are: the device can realize high-precision detection in the harsh pipeline environment, and perform pre-alarm for pipeline wall thinning, pipeline wall cracks and pipeline wall leaks, and at the same time, the carrier of the mobile device is designed to be more airtight. Strong, the action control is more convenient, the structure is simple and practical, it has very good reality and economy, and can be applied to production practice.

Description

Technical field: [0001] 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. Background technique: [0002] 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 these occasions, pi...

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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