Pressurization device, tube wall crack propagation speed testing device, pressurization method and testing method

Abstract

The invention discloses a pressurization device, a tube wall crack propagation speed testing device, a pressurization method and a testing method. The pressurization device includes a high-pressure gas delivery pipe for delivering high-pressure gas to a metal tube, an A-class air compressor, a B-class air compressor and a C-class air compressor; the high-pressure gas delivery pipe is communicated with the metal tube through a first-level valve, the A-class air compressor is arranged on the high-pressure gas delivery pipe, the tail end of the high-pressure gas delivery pipe is provided with a tee converter, and the tee converter is connected with the B-class air compressor and the C-class air compressor. The pressurization method adopts a stepped-type interval paused pressurization process, a flexible transformation pressurization and pressure-relieving way and a whole-process multi-means monitoring, and can realize that the tube internal pressure of the metal tube gradually reaches a target value; according to the tube wall crack propagation speed testing device, a time probe unit closely adheres to the metal tube wall, and opening of the tube wall and disconnection of the time probe can be guaranteed to be simultaneously carried out.

Description

technical field [0001] The invention relates to a pressurizing device, a device for testing the crack growth speed of a pipe wall, and a pressurizing and testing method, belonging to the technical and safety fields of gas-liquid high-pressure pipeline transportation engineering. Background technique [0002] During the operation of high-pressure gas pipelines, due to pressure changes in the pipeline, fatigue or damage of pipeline materials, and external effects, cracks in the pipeline wall will occur somewhere in the pipeline and then expand for a long distance, which will not only cause serious economic losses and environmental damage. Pollution will also cause catastrophic accidents such as casualties on the ground, damage to buildings and facilities. Therefore, in order to minimize the loss and speed up the repair process after the accident, the mechanical behavior of crack formation and expansion of large-diameter high-pressure metal pipelines has been extensively studie...

AI Technical Summary

Problems solved by technology

[0002] During the operation of high-pressure gas pipelines, due to pressure changes in the pipeline, fatigue or damage of pipeline materials, and external effects, cracks in the pipeline wall will occur somewhere in the pipeline and then expand for a long distance, which will not only cause serious economic losses and environmental damage. Pollution will also cause catastrophic accidents such as casualties on the ground, damage to buildings and facilities, etc.

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