Pipeline defect and magnetic leakage detection device

Abstract

The invention relates to the technical field of pipeline defect detection and discloses a pipeline defect and magnetic leakage detection device which comprises a central shaft, a magnetic conduction device and a flux leakage detection device, wherein a left leather cup and a right leather cup are fixedly installed at both ends of the central shaft through a flange disc and a pressure plate, the magnetic conduction device which can conduct magnetism to a pipeline to be detected is installed on the central shaft between the left leather cup and the right leather cup, and a flux leakage detection device which can detect magnetic leakage signals is installed at the outer side of the middle part of the magnetic conduction device. The invention has the advantages of reasonable and compact structure and convenient use, and can efficiently magnetize an oil pipe and enhance the magnetization strength of a pipe wall to be detected, thereby greatly enhancing the detection quality of defects of an oil pipeline and being not easy to generate blockage when passing through a variable diameter part of the pipeline because of favorable deformation by arranging a plate spring.

Description

1. Technical field [0001] The invention relates to the technical field of pipeline defect detection, and relates to a pipeline defect magnetic flux leakage detection device. 2. Background technology [0002] At present, my country's oil and gas long-distance pipelines are facing serious problems: most of the pipelines in service were built in the 1960s and 1970s, and they have entered the middle-aged and old age, and are in the stage of frequent accidents. The annual maintenance cost of oil and gas pipelines in my country is as high as hundreds of millions of yuan, and there is a gradual increase trend. Due to the restriction of detection methods, most of the pipeline damage cannot be accurately identified and located, often resulting in unnecessary losses such as blind excavation, blind scrapping, and lack of scientific maintenance. The magnetic flux leakage method is one of the important methods for non-destructive testing of oil and gas long-distance pipelines. It judges...

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Problems solved by technology

[0003] The invention provides a magnetic flux leakage detection device for pipeline defects, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the existing magnetization device cannot effectively magnetize the oil pipe, and the magnetization intensity is not high. prone to clogging

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