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External leak rate test apparatus

A test device and leak rate technology, which is applied in the field of spacecraft total leak rate test equipment, can solve the problems of high single-point failure probability, etc., and achieve the effect of improving the total leak rate test capability, convenient portability, and compact structure

Inactive Publication Date: 2018-01-05
BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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Problems solved by technology

Multiple leak detectors need to be transported to the base before leak detection at the base. In practice, it is found that the total leak rate test leak detector has a higher probability of single-point failure after transportation.

Method used

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  • External leak rate test apparatus

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Embodiment Construction

[0028] 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.

[0029] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0030] Usually, the basic principle of the spacecraft total leak rate test method is the non-vacuum accumulation method. This method is to put the spacecraft filled with a certain pressure of high-purity helium into the collection tank, and first use the helium mass spectrometer to test the leakage in the collection tank. Helium concentration U 1 (initial value), after accumulating for a certain time t (t 2 -t 1 , t 1 is the starting tim...

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Abstract

The invention discloses an external leak rate test apparatus which comprises a standard gas tank, an industrial personal computer, a network cable or a serial port RS-232 interface, and a gas switching device. The standard gas tank and the gas switching device are in standard gas connection. The standard gas tank is also provided with a gas sample inlet and a gas sample outlet which are intended for separately communicating with the gas sample which is generated from the leakage of a spacecraft accommodated in a vacuum container. The gas switching device is also in separate connection to the gas sample inlet and the gas sample outlet. A circuit control unit controls an electric valve of the gas switching device, and controls a leak detection instrument through the electrical connection between the serial port and an electric control part of the leak detection instrument. According to the invention, the apparatus herein has the characteristics of compact structure, easy pipeline connection, easy and comfortable operation, stable and reliable performances, easy portability, and high leak detection sensitivity.

Description

technical field [0001] The invention belongs to the technical field of spacecraft leakage detection, in particular, the invention relates to a spacecraft total leakage rate testing equipment. Background technique [0002] During the final assembly process of the spacecraft, multiple total leak rate tests are required. The main method of the total leak rate test of the spacecraft is the non-vacuum helium accumulation method. At present, there are a large number of mature commercial leak detectors on the market, but none of them can meet the detection requirements of the total leak rate of spacecraft, and the existing leak detectors need to be modified and improved. The leak detection task of the modified leak detector is single, and only the ZQJ-291 series and ZQJ-30 series leak detectors produced by Beijing Keyi can be modified, because the ZQJ-291 series and ZQJ-30 series are old leak detection The performance of the equipment is gradually falling short of the requirements...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/20
Inventor 窦仁超师立侠孙立臣洪晓鹏刘兴悦喻新发冯琪周雪茜李晓阳刘胜
Owner BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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