Scanning device for pulsed eddy current testing of non-ferromagnetic pipeline

Abstract

The invention belongs to the technical field of pipeline nondestructive testing equipment, and specifically discloses a scanning device for pulsed eddy current testing of a non-ferromagnetic pipeline.The scanning device comprises a bottom plate, and is characterized by comprising a pulsed eddy current testing probe mechanism, several clamping mechanisms and a driving unit for driving the scanningdevice to move on a pipeline; the pulsed eddy current testing probe mechanism is arranged below the bottom plate and comprises a probe, screws and springs; several clamping mechanisms are symmetrically arranged on both sides of the bottom plate; one end of a claw is connected to the torsion spring through a claw rotary shaft and a protrusion portion of the torsion spring is pressed on the claw for pressing the claw to provide a clamping force of the claw to the pipeline; and a pulley is further arranged at the other end of the claw. According to the scanning device for pulsed eddy current testing of the non-ferromagnetic pipeline, the device can realize the testing of the wall thickness reduction type defects of non-ferromagnetic large-diameter metal pipelines, and can adapt to the pipelines of various specifications; and the multi-path testing of the pipelines is realized by combining the two scanning paths above the pipeline and below the pipeline.

Description

technical field [0001] The invention belongs to the technical field of pipeline non-destructive testing equipment, and more specifically relates to a scanning device for pulsed eddy current testing of non-ferromagnetic pipelines. Background technique [0002] Pipelines are widely used in various engineering and industrial installations such as oil and gas, chemical industry, electric power and heating, and play an extremely important role in industrial production and daily life. The pipeline is affected by high temperature, high pressure and complex external environment during long-term use, and cracks are prone to occur. At the same time, the inner wall of the pipeline is eroded and corroded by the medium, resulting in large-area corrosion and thinning of the wall thickness. If effective monitoring or maintenance is not carried out, the above defects will expand rapidly under high pressure, causing cracks in the pipe wall and causing pipeline leakage or even explosion, whic...

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Problems solved by technology

[0004] The patent document of Chinese patent CN 101255942B discloses a pipeline overhaul automatic spraying machine for spraying anticorrosion layer after pipeline excavation. It is a device that walks around the outer surface of the pipeline. frame, and a clamping wheel with a spring is set on the frame to clamp the pipe, which can be applied to pipes of various diameters, but the device is bulky, poor in portability, and complicated to install

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