Vacuum container sectional pressure raising quantitative leakage rate test method

A technology of vacuum container and leak rate, which is applied in the direction of using liquid/vacuum degree for liquid tightness measurement and measuring the fluid's acceleration and deceleration rate, etc. Effect

Inactive Publication Date: 2014-02-26
BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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Problems solved by technology

From the perspective of the function of the vacuum container to obtain a certain degree of vacuum, the unit of Pa / s to express the leak rate has great limitations in terms of application scalability

Method used

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  • Vacuum container sectional pressure raising quantitative leakage rate test method
  • Vacuum container sectional pressure raising quantitative leakage rate test method

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Embodiment Construction

[0024] The following is a specific implementation manner of the content of the present invention, and the content of the present invention will be further clarified through the specific implementation mode below. Of course, the following specific embodiments are described only to illustrate different aspects of the present invention, and should not be construed as limiting the scope of the present invention.

[0025] Such as figure 1 As shown, the test process of the present invention is: the passage type standard leak hole 1 is connected on the vacuum container 4 through the standard leak hole introduction valve 2, and the vacuum container 4 is connected with the vacuum gauge 3 and the vacuum system valve 5 respectively, and the vacuum pump 6 is connected with the vacuum system valve 5. Vacuum system valve 5 is connected. Close the standard introduction valve 2, open the vacuum system valve 5, run the vacuum pump 6 to evacuate the vacuum container 4, and monitor the pressure...

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Abstract

The invention relates to a method for obtaining a leakage rate by using a static pressure raising method. A standard leak is connected with a vacuum container to be tested through an introduction valve, a vacuum system is started to pump the vacuum container to have stable pressure, the pressure change in each time section is measured, a vacuum container leakage rate Q is obtained through formula calculation, and the unit is Pa*m3 / s. The method has the advantages of simplicity and low needed resources, the vacuum container leakage expressed by an international unit system can be obtained in one time of pressure raising process, the method is rapid and convenient, the resources can be conveniently obtained in the field, and so the cost is low.

Description

technical field [0001] The invention belongs to the technical field of vacuum and leak detection, and specifically relates to a method for quantitatively measuring the total leak rate of a vacuum container, which can be used for the quantitative measurement of the total leak rate of the vacuum container. Background technique [0002] At present, the static boost method is used to measure the leak rate of the vacuum container, and the leak rate unit generally obtained is Pa / s, not Pa·m3 / s, which is the international system of leak rate units. This is mainly due to the irregular structure of the vacuum container in the project, and there are generally working components with different volumes and complex structures inside the container, which makes it impossible to calculate the effective volume inside the vacuum container. Therefore, the obtained leak rate often has to use the unit of Pa / s. The leak rate of the vacuum container obtained by this method can only be used as a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/32
Inventor 史纪军孙立臣汪力刘恩均李文斌赵建超孙立志李征舒靖
Owner BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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