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Low-pressure gas atmosphere simulation device

A simulation device and low-pressure gas technology, which is applied in the field of environmental simulation tests, can solve the problems of high cost and difficulty in purchasing standard gas, and achieve the effects of improving efficiency, improving temperature control efficiency and precision, and heating efficiency

Active Publication Date: 2019-05-07
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for some special gases, such as some organic gases: alcohols, hydrocarbons or benzene gases, standard gases are not easy to purchase, and the cost is relatively high

Method used

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  • Low-pressure gas atmosphere simulation device

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Embodiment 1

[0027] Embodiment 1: The low-pressure gas atmosphere simulation device of this embodiment includes a vacuum chamber, a molecular sieve adsorbent 1, a gas source cabin body 2, a gas source cabin cover plate 3, and a temperature control element 4;

[0028] Wherein, the gas source cabin body 2 is located in the vacuum chamber, and the inside of the gas source cabin body 2 is provided with a groove for placing the molecular sieve adsorbent 1, and the molecular sieve adsorbent 1 is an adsorbent for adsorbing the liquid reagent of the gas to be simulated Air source cabin cover plate 3 is placed on the top of the air source cabin cabin body 2; There is a gap between the bottom of the air source cabin cover plate 3 and the top of the groove; the central opening of the air source cabin cover plate 3 is used for air outlet ; The temperature control element 4 is used to control the temperature of the heating gas source cabin cabin body 2 within a set range. The overall cross-sectional st...

Embodiment 2

[0030] Embodiment 2: a kind of methanol gas environment simulation device, such as Figure 4 shown. It includes a main vacuum chamber 7 , an air source chamber 8 , an exhaust system 9 , a mass spectrometer 10 , a gate valve 11 and a secondary vacuum chamber 12 .

[0031] The structure of the main and auxiliary vacuum chambers is adopted to prevent the main vacuum chamber from being exposed to the atmosphere and maintain cleanliness. Wherein, the exhaust system 9 is used to evacuate the main vacuum chamber 7 and the auxiliary vacuum chamber 12, and the mass spectrometer 10 is used to measure the partial pressure of methanol gas; the plug valve 11 is connected to the main vacuum chamber 7 and the auxiliary vacuum chamber 12, For transporting the gas source capsule 8 into the main vacuum chamber 7 , the gas source capsule 8 is initially placed in the auxiliary vacuum chamber 12 .

[0032] Molecular sieve adsorbent 1 selection specification: 5A type. The way to obtain it is: fu...

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Abstract

The invention provides a low-pressure gas atmosphere simulation device, and a complex low-pressure gas atmosphere can be simply and flexibly simulated. According to the invention, a molecular sieve adsorbing agent which adsorbs a liquid reagent of gas to be simulated is used as a gas source, and the liquid reagent is volatilized in a vacuum room by heating, so that a simulated low-pressure gas environment (about less than 102 Pa) is obtained. Standard gases of some special gases are not easy to purchase, but liquid reagents (analysis pure or above) are easily obtained, so that the defects thatgases simulated by a conventional method are few in types, complex in system and high in cost are overcome.

Description

technical field [0001] The invention belongs to the technical field of environmental simulation tests, and relates to a low-pressure gas atmosphere simulation device. Background technique [0002] In some experiments or experimental research and industrial production, it is necessary to provide a special low-pressure gas atmosphere, for example, the response test of the gas sensor, the simulation of the orbital space gas environment, etc. The traditional simulation device needs to provide the standard gas of the required gas, which is mixed outside the vacuum chamber and then passed into the vacuum chamber through a micro-flow valve. However, for some special gases, such as some organic gases: alcohols, hydrocarbons or benzene gases, standard gases are not easy to purchase, and the cost is relatively high. Therefore, there is an urgent need for a simple and flexible simulation device to realize low-pressure gas atmosphere simulation. Contents of the invention [0003] In...

Claims

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Application Information

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IPC IPC(8): B01J7/00
Inventor 杨生胜庄建宏王俊苗育君郭兴薛玉雄张剑锋黄一凡把得东王光毅乔佳张晨光
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH