Convenient online constant magnetic detection device for pressure-bearing industrial pipeline

Abstract

The invention discloses a convenient online constant magnetic detection device for a pressure-bearing industrial pipeline. The convenient online constant magnetic detection device comprises a magnetization mechanism and a detection mechanism, wherein the magnetization mechanism comprises a magnetism conducting handle, two constant magnets and two magnetization pole shoes; the two ends of the magnetism conducting handle are respectively connected to the upper sides of the two constant magnets; the lower side of each constant magnet is connected to the magnetization pole shoe; the detection mechanism comprises a probe and a tunnel magneto-resistance bridge array; the two ends of the probe are connected to the inner sides of the magnetization pole shoes located at the two ends of the magnetism conducting handle; the probe is located in the middle between the magnetization pole shoes; the bottom of the probe fits the outer wall of the pipeline to be detected; and the tunnel magneto-resistance bridge array is arranged in the inner cavity of the probe. The convenient online constant magnetic detection device is simple in structure, easy to manufacture, safe and reliable, energy-saving and environmental-friendly, and low in operation failure rate.

Description

technical field [0001] The invention relates to a portable on-line constant magnetic detection device for pressure-bearing industrial pipelines. Background technique [0002] On-line pressure-bearing industrial pipelines operate continuously under high temperature, high pressure, high load and corrosion environments. If there are defects or severe corrosion in the pipeline, it will cause leakage, burst, or even disaster. Highly reliable testing instruments must be used to comprehensively test the quality of the pipeline everywhere to ensure the safe operation of pressure-bearing industrial pipelines. [0003] Existing technology and its deficiency: [0004] At present, the two conventional methods of eddy current and ultrasonic testing are usually used in the world to detect online pressure-bearing industrial pipelines. [0005] 1. Eddy current testing uses an AC magnetizer to magnetize the pipeline. Since the metal pipe is an electrical conductor, the circumferential dir...

AI Technical Summary

Problems solved by technology

On the one hand, it is very difficult to coat the medium everywhere in the online pipeline. On the other hand, the performance of the medium coupling acoustic wave has a great influence on the detection results, and it is also difficult to comprehensively detect the online boiler pipeline; Severely interfere with the ultrasonic signal, which is not conducive to the extraction and identification of ultrasonic signals

In addition, the focused sound beam can only be transmitted locally in the pipeline, so ultrasonic testing is a method for detecting local areas of the pipeline, and cannot fully detect defects at all points of the pipeline.

[0007] The deficiencies of the above-mentioned prior art can be summed up as only the outer surface detection or partial detection, and the coupling agent affecting the detection performance and other issues

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