Instability test device of external pressure vessel

A technology for a test device and an external pressure vessel, which is applied in the field of an external pressure vessel instability test device, can solve the problems of safety loss of cylindrical engineering, narrow use range, large error, etc., and achieves the effect of ensuring safe operation and improving accuracy

Inactive Publication Date: 2012-07-11
ZHEJIANG UNIV
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Problems solved by technology

The design formula for determining the critical pressure is often only an empirical formula, which has large errors and cannot be solved accurately, causing a lot of inconvenience to engineering applications
In order to avoid unforeseen engineering losses and safety hazards caused by the sudden external pressure instability of the cylinder due to external pressure, it is necessary to provide a mechanical performance testing device for external pressure vessels
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Method used

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  • Instability test device of external pressure vessel
  • Instability test device of external pressure vessel

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Embodiment Construction

[0011] The structural principle and working principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0012] Such as figure 1 As shown, the instability test device of the external pressure vessel of the present invention includes: a cylinder body 1, a test frame 3, a flange 4, a flange cover 5, a gland 9, an exhaust valve 12, a safety valve 13, and a digital display pressure gauge 14 , computer 15, pressure source 16, buffer tank drain valve 17, cylinder drain valve 18, buffer tank 19 and pressure sensor 20.

[0013] Among them, the cylinder 1 is fixed on the test frame 3, the flange 4 is welded on the cylinder 1, the flange cover 5 is connected to the flange 4 through bolts 11, and the gasket 10 is placed between the flange cover 5 and the flange 4 , to play a sealing role; the gland 9 presses the container 8 to be tested on the flange cover 5 through the screw 6, and the O-shaped sealing ring 7 is placed between th...

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Abstract

The invention discloses an instability test device of an external pressure vessel. The instability test device comprises a cylinder body, a test frame, a flange, a flange cover, a pressing cover, an exhaust valve, a security valve, a digital display pressure meter, a computer, a pressure source, a water discharging valve of a buffering tank, a water discharging valve of the cylinder body, the buffering tank and a pressure sensor. When in use, the instability test device is used for pressurizing to the cylinder body, so that instability test data of a vessel to be measured can be measured under an effect of uniformly distributing external pressure on the circumference or combined circumference external pressure and axial loading effect. The instability test device has the characteristics of simple structure, accurate measurement and real-time data recording.

Description

technical field [0001] The invention relates to the technical field of pressure equipment testing, in particular to an instability testing device for external pressure vessels. Background technique [0002] At present, many pressure vessels widely used in daily life and industrial production work under external pressure. For external pressure cylinders, the main design problem is not strength, but stability; the condition to ensure its stability is that the allowable design pressure is less than the critical instability pressure. Therefore, the critical pressure is the main basis for judging the instability of a thin-walled cylinder under external pressure. The design formula for determining the critical pressure is often only an empirical formula with large errors and cannot be solved accurately, which causes a lot of inconvenience to engineering applications. In order to avoid unforeseen engineering losses and potential safety hazards caused by sudden external pressure i...

Claims

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Application Information

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IPC IPC(8): G01N3/12G01M99/00G09B23/12
Inventor 刘鹏飞周池楼郑津洋陈志平吴彩娟顾超华
Owner ZHEJIANG UNIV
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