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

A pressurizing device and pipe wall technology, applied in the direction of applying stable tension/pressure to test material strength, measuring devices, strength characteristics, etc., can solve damage to buildings and facilities, economic loss and environmental pollution, long pipeline Problems such as distance expansion, to achieve the effect of safe and reliable test method, safe method and meeting the test requirements

Inactive Publication Date: 2016-02-24
ARMY ENG UNIV OF PLA
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  • Abstract
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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

Method used

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

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Example Embodiment

[0035] Such as figure 1 with figure 2 As shown, a pressurizing device of the present invention includes a high-pressure gas delivery pipe that delivers high-pressure gas to a metal pipe 1, a type A air compression device 21, a type B air compression device 22, and a type C air compression device 23. The high-pressure gas delivery pipe communicates with the metal pipe 1 through a primary valve 19, the A-type air compressor 21 is installed on the high-pressure gas delivery pipe, and the end of the high-pressure gas delivery pipe is provided with a three-way converter 12, and a three-way converter 12 It is connected to the B type air compression device 22 and the C type air compression device 23 respectively. Wherein, the Class A air compression device 21 includes a first secondary valve 11, a first conversion joint 17 and a first air pipe 18, and the first air pipe 18 is connected to the first secondary valve 11 through the first conversion joint 17. The first secondary valve 11...

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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...

Claims

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Application Information

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IPC IPC(8): G01N3/10G01N3/02
CPCG01N3/02G01N3/10
Inventor 高福银徐全军龙源纪冲毛益明宋克健吴建源姜楠吴建宇李兴华
Owner ARMY ENG UNIV OF PLA
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