Pipeline inspection device based on rotating electromagnetic field

Abstract

The invention relates to a pipeline inspection device and in particular relates to a pipeline inspection device based on a rotating electromagnetic field. The pipeline inspection device is mainly composed of a navigator, a cleaning packing cup, a flexible joint A, an exciting coil, a framework, an axial inspection coil, a tangential inspection coil, a flexible joint B, a power packing cup and an odometer wheel, wherein three phases of alternating currents having the sequential phase difference of 120 degrees are introduced into the exciting coil respectively, a circular flow eddy is produced by an alternating magnetic field on the inner wall of the pipeline, the eddy is distorted while passing through a defect and causes the distortion of the space magnetic field, the distortion signal is detected by the axial inspection coil and the tangential inspection coil, and the size and position information of the defect can be obtained by analyzing the phase and amplitude information of the axial inspection coil and the tangential inspection coil. The pipeline inspection device has the beneficial effects that the rotating electromagnetic field technology is adopted and a pipeline pig is taken as a carrier so that automatic rotation of the eddy current on the inner wall of the pipeline can be realized, and therefore, the defect can be recognized quickly and the position and the size of the defect can be determined; the pipeline inspection device has high popularization and application values.

Description

technical field [0001] The invention relates to a pipeline detection device, in particular to a pipeline detection device based on a rotating electromagnetic field. Background technique [0002] Pipelines are known as the national energy artery, which is of great significance for ensuring the country's energy supply. As the pipeline ages, due to corrosion and stress, various types of defects will appear inside the pipeline. Regular and effective testing of pipelines can eliminate defects in time and reduce pipeline rupture accidents. The pipe pig is a common device for pipeline inspection. It relies on external or its own power to move along the inside of the pipeline, and uses its own detection equipment to detect pipeline defects. In order to realize the comprehensive detection of the pipeline circumference, the traditional measurement technology of pipeline pigs uses array sensors, which leads to complex system design. The mechanical rotating probe method is prone to i...

AI Technical Summary

Problems solved by technology

In order to realize the comprehensive detection of the pipeline circumference, the traditional measurement technology of pipeline pigs uses array sensors, which leads to complex system design

The mechanical rotating probe method is easy to introduce interference signals and is prone to failure during operation inside the pipeline

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