Spacecraft sealed cabin gas sampling and analyzing system for vacuum thermal test and analyzing method

A vacuum thermal test and gas sampling technology, which is applied in thermal excitation analysis, material excitation analysis, etc., can solve the problems of low gas composition accuracy, complex sampling system structure, and many processes, and achieve simple structure, simple operation process, and high precision. high effect

Active Publication Date: 2019-05-24
BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In terms of gas sampling and analysis for spacecraft vacuum thermal tests, relevant literature and patents only involve traditional gas chromatography gas analyzers, infrared spectrum analyzers, laser gas analysis, ...

Method used

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  • Spacecraft sealed cabin gas sampling and analyzing system for vacuum thermal test and analyzing method
  • Spacecraft sealed cabin gas sampling and analyzing system for vacuum thermal test and analyzing method

Examples

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Effect test

Embodiment 1

[0030] Embodiment one, refer to figure 1 As shown, the spacecraft airtight cabin gas sampling and analysis system for vacuum thermal test includes space environment simulator 1, sampling analysis system and gas sampling pipeline. Space environment simulator 1 is provided with airtight cabin 2, and the sampling analysis system includes sampling chamber 7. Gas analysis device, air pressure detection device, pump group and valve group, the sealed cabin 2 is connected to the sampling chamber 7 through the gas sampling pipeline, the gas analysis device and the air pressure detection device are fixedly installed on the sampling chamber 7, and the pump group passes through The valve group is communicated with the sampling chamber 7 .

Embodiment 2

[0031] Embodiment 2. The gas sampling pipeline includes a spiral gradually expanding air inlet pipe 6, a temperature control pipe 4, a first solenoid valve 3 and a butterfly valve 5. One end of the spiral gradually expanding air inlet pipe 6 is connected to the sampling chamber 7, and the spiral gradually expanding air inlet pipe 6 The other end is communicated with one end of the temperature control tube 4 through the butterfly valve 5 , and the other end of the temperature control tube 4 is communicated with the sealed cabin 2 through the first electromagnetic valve 3 .

Embodiment 3

[0032] Embodiment 3. The pump set includes a molecular pump 11 and a scroll pump 12. The molecular pump 11 is a high-vacuum molecular pump with a model of TwisTorr 704F, which has a higher compression ratio and front-stage pressure resistance. A higher compression ratio (especially for small molecular gases) can bring better ultimate vacuum, and a higher backing pressure allows the use of smaller backing pumps, thereby reducing the overall vacuum system. Cost and size, the scroll pump 12 is an Agilent Varian scroll dry pump SH-100, the valve group includes a second solenoid valve 10 and a third solenoid valve 13, one end of the second solenoid valve 10 communicates with the sampling chamber 7, the second The other end of the solenoid valve 10 is connected to the molecular pump 11 and one end of the third solenoid valve 13 respectively, and one end of the scroll pump 12 is connected to the other end of the molecular pump 11 and the third solenoid valve 13 respectively. Since the...

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Abstract

The invention discloses a spacecraft sealed cabin gas sampling and analyzing system for a vacuum thermal test. The system comprises a space environment simulator, a sampling and analyzing system and agas sampling pipeline, a sealed cabin is arranged in the space environment simulator, the sampling and analyzing system comprises a sampling bin, a gas analyzing device, a gas detection device, a pump set and a valve group, and the sealed cabin is in communicated connection with the sampling bin through the gas sampling pipeline. The system is simple in structure, high in stability, capable of monitoring gas composition in the sealed cabin, few in monitoring error, high in accuracy, capable of avoiding subsequent risk of the sealed cabin and simple in monitoring process operation; when pressure of the sealed cabin is lower than 50Pa, vacuumizing pressure difference sampling is not needed, so that energy damage is lowered, diffusion to the sampling bin through thermal motion can be realized, and the gas composition in the sealed cabin can be directly analyzed through a spectral mass spectrometer.

Description

technical field [0001] The invention belongs to the technical field of gas analysis for vacuum heat test, in particular to a gas sampling and analysis system of a spacecraft airtight cabin for vacuum heat test, and also discloses a gas sampling and analysis method for a spacecraft airtight cabin for vacuum heat test. Background technique [0002] In the chemical industry, vacuum coating, toxic and harmful gas verification, medical and health and other fields, it is necessary to detect and analyze gas components to guide production, avoid risks, and protect human health. [0003] The airtight cabin of a manned spacecraft needs real-time monitoring of gas composition and content, which is crucial to the life safety of astronauts. In the field of spacecraft vacuum thermal test, especially in the pressure relief test of the sealed cabin, it is necessary to monitor the gas composition and content in the cabin in real time, keep the water vapor content low, and maintain a reasonab...

Claims

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Application Information

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IPC IPC(8): G01N21/73
Inventor 武越李培印黄威刘国青洪辰伟解峥魏茜张景川
Owner BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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