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Experimental equipment for testing characteristic of liquid helium filter

A characteristic test and filter technology, which is used in measuring devices, machine/structural parts testing, instruments, etc., can solve the problem of not finding liquid helium filter characteristic test device data, etc., so as to reduce the consumption of liquid helium and achieve uniform mixing. , the effect of reducing heat

Inactive Publication Date: 2007-08-01
SHANGHAI JIAO TONG UNIV
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  • Abstract
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Problems solved by technology

After consulting relevant Chinese and foreign documents, in the prior art, no information about the "test device for the characteristics of liquid helium filters" has been found.

Method used

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  • Experimental equipment for testing characteristic of liquid helium filter
  • Experimental equipment for testing characteristic of liquid helium filter

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Embodiment Construction

[0017] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0018]As shown in Figure 1, Figure 2 and Figure 3, the present invention comprises an oxygen cylinder 1, a nitrogen cylinder 2, a helium cylinder 3, an oxygen decompression valve 4, a nitrogen decompression valve 5, a helium decompression valve 6, a helium flow rate Meter 7, Nitrogen and Oxygen Flow Meter 8, Helium Filling Valve 9, Nitrogen and Oxygen Filling Valve 10, Air Release Valve 11, A Pressure Sensor 12, Regeneration Helium Inlet Valve 13, B Pressure Sensor 14, A Regeneration Helium intake branch valve 15, B regeneration helium intake branch valve 16, impurity gas precooler 17, doping gas connecting pipe 18, burst disc 19, vacuum gauge 20, gas-liquid mixer 21, A temperature sensor 22. Liquid helium filter 23, B temperature sensor 24, vacuum box 25, heat exchanger 26, vacuum pump 27, vacuum valve 28, gas chromatograph 29, sampling ...

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Abstract

This invention relates to one helium filter property test device in low temperature engineer and technique field, which comprises oxygen steel bottle, nitrogen gas steel bottle, helium steel bottle, mixture gas pre-cooling device, gas and liquid mixture, liquid helium filter, vacuum box, heat conversion device, gas phase color spectrum, sampling valve, liquid helium Dewar, helium flow meter, nitrogen gas and oxygen flow meter. This invention adopts metal filter structure and adopts nitrogen gas and oxygen as mixture gas to lower the mixture gas pre-cooling gas temperature form roommate one to liquid nitrogen temperature.

Description

technical field [0001] The invention relates to a characteristic test device of a liquid helium filter. In particular, it is a liquid helium filter characteristic test device that uses nitrogen and oxygen as impurity gases to dope liquid helium. It belongs to the field of cryogenic engineering and cryogenic technology. Background technique [0002] At present, the methods for extracting helium in industry mainly include condensation method, membrane separation method and diffusion method, and the method for removing a small amount of impurities also includes physical adsorption. For example, for the separation of nitrogen and helium, it can be condensed first, and then the concentration of helium can be increased to 99.995% after adsorption by activated carbon. However, the above-mentioned methods are all aimed at the purification of helium gas. At liquid helium temperatures, almost all impurities exist as solids. If the liquid helium mixture is first vaporized and purif...

Claims

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Application Information

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IPC IPC(8): G01N1/38G01M19/00G01N30/02G01M99/00
Inventor 石玉美汪荣顺李娟
Owner SHANGHAI JIAO TONG UNIV
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