Device for detecting defects on inner surface of high-pressure hydrogen storage container

Abstract

The invention discloses a device for detecting defects on the inner surface of a high-pressure hydrogen storage container. The device comprises a fluorescent magnetic suspension supply pool, a magnetic powder detection core rod, a residual liquid collection pool and a magnetization control cabinet; a fluorescent magnetic suspension is contained in the fluorescent magnetic suspension supply pool; the magnetic powder detection core rod penetrates through the interior of the to-be-detected container; a plurality of magnetic suspension liquid outlets are formed in the magnetic powder detection core rod; the two ends of the magnetic powder detection core rod are connected with the fluorescent magnetic suspension supply pool through pipelines; the residual liquid collecting pool is communicated with the to-be-detected container; the magnetization control cabinet is electrically connected with the magnetic powder detection core rod, the magnetization control cabinet is used for controlling the magnetic powder detection core rod to generate a circumferential magnetic field, and after the inner surface of the to-be-detected container is wetted by the fluorescent magnetic suspension, magnetic traces are generated at the defect position of the to-be-detected container under the action of the circumferential magnetic field, so that the detection of the defect of the inner surface of the high-pressure hydrogen storage container is realized.

Description

technical field [0001] The invention relates to the technical field of container defect detection, in particular to a device for detecting defects on the inner surface of a high-pressure hydrogen storage container. Background technique [0002] During use, the high-pressure hydrogen storage container stores high-pressure hydrogen above 45MPa, and the inner surface of the container is in a hydrogen environment, which is prone to hydrogen embrittlement damage. The crack growth rate in this environment is more than 30 times that of the air environment. In the alternating load condition, it is very easy to cause the explosion of the container due to the crack expansion. Due to the stress distribution of the container and the manufacturing process, the internal defects of the container are basically distributed longitudinally, and the longitudinal defects are more harmful, so the detection of longitudinal defects is the main method. [0003] Since the high-pressure hydrogen stora...

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Problems solved by technology

[0005] There are many types of existing magnetic particle testing technologies and equipment, but they need to be in contact with the surface of the test workpiece, and the opening of this type of container is small, and it is impossible to enter the interior for testing, so it is impossible to detect the inner surface defects of the high-pressure hydrogen storage container

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