Handheld pipeline welding seam flux leakage detection device and detection method thereof

Abstract

The invention relates to a handheld pipeline welding seam flux leakage detection device and a detection method thereof. A machine frame of the handheld pipeline welding seam flux leakage detection device is provided with proceeding wheels, one proceeding wheel is a fixed distance wheel, one side of the fixed distance wheel is fixedly provided with a driving wheel, the driving wheel is meshed with a driven wheel, the transmission ratio of the driving wheel to the driven wheel is 1:1, and the side face of the driven wheel is coaxially provided with an encoder; two permanent magnets of a magnetization mechanism are arranged below an armature side by side, each permanent magnet is protected by a pole piece below the permanent magnet, and the magnetization direction is perpendicular to the proceeding direction; a sensor box of a data acquisition mechanism is fixed below the armature, and is located between the two permanent magnets, and a spring is arranged between the sensor box and the armature; a Hall sensor is parallel to the bottom face of the pole piece and is arranged inside the sensor box, and the Hall sensor array direction is parallel to the magnetization direction, and is perpendicular to the proceeding direction. According to the handheld pipeline welding seam flux leakage detection device and the detection method thereof, the pipeline welding seam detection based on a flux leakage method is achieved, and the technical barrier that a traditional detection device is not applicable to welding seam detection is broken through.

Description

technical field [0001] The invention relates to a detection device for corrosion defects on the outer wall of a pipeline, in particular to a hand-held pipeline welding seam magnetic flux leakage detection device and a detection method thereof. Background technique [0002] Oil and gas pipelines are oil and natural gas transportation tools. In the case of long-term operation, major accidents such as corrosion, perforation, cracking, and seal failure may occur, causing major fires or explosions caused by oil leakage. The ecological environment poses a serious threat. According to statistics, in the accident of pipeline leakage and explosion, one of the most important risks affecting its safety is weld defect. Therefore, accurate and rapid detection of pipeline welds is of great safety significance and economic value to ensure national public safety. The magnetic flux leakage detection technology that emerged in the 1960s has the advantages of high detection reliability, easy...

AI Technical Summary

Problems solved by technology

The magnetic flux leakage detection technology that emerged in the 1960s has the advantages of high detection reliability, easy automation, and high detection efficiency. It is widely used in the detection of tank floors, tank walls, and pipelines in tank farms. There is no magnetic flux leakage detection device specially used for pipeline welds, and the detection system mode in which the magnetization direction of the traditional pipeline magnetic flux leakage detection device is parallel to the direction of travel is no longer applicable

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