Miniaturized sample collecting device used for gas sampling

A sample collection and gas sampling technology, applied in the direction of sampling devices, etc., can solve the problems of inconvenient transportation, cost of leaking gas containers, etc., and achieve the effect of ensuring correctness, reducing transportation difficulty and cost, and good airtight performance

Inactive Publication Date: 2016-09-21
PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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AI Technical Summary

Problems solved by technology

The present invention aims to solve the leakage problem caused by the above-mentioned pre-vacuumization method and the problem of high cost and inconvenient transportation of the gas container, and proposes a miniaturized gas sample collection solution

Method used

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  • Miniaturized sample collecting device used for gas sampling
  • Miniaturized sample collecting device used for gas sampling

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Embodiment Construction

[0019] The diaphragm pump adopts the miniature air pump NPK 09DC produced by German KNF company. The pump is a dual-purpose air pump for positive and negative pressure: it can be used for vacuuming to generate a low-pressure environment, and it can also be used to compress the gas to obtain high-pressure gas. Negative pressure can reach a vacuum of 100mbar, high pressure can obtain an output pressure of up to 7bar, pumping speed is 15 liters per minute, small size (129mm*107mm*65mm), light weight (1.6 kg), DC power supply (24V2.6A ), very suitable for miniaturized instruments and equipment.

[0020] The four-way ball valve adopts the 40 series integrated instrument ball valve produced by Swagelok in the United States, the working pressure can reach 170bar, and the air flow can reach 25L / min, 67L / min and 120L when the pressure drop is 0.68bar, 3.4bar and 6.8bar respectively / min. The maximum leakage rate of the valve seat is 10 -4 L / min. The tube quick connector is used to m...

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Abstract

The invention provides a miniaturized sample collecting device adopting the combination of a diaphragm pump and a four-way ball valve. The miniaturized sample collecting device is composed of the diaphragm pump, the four-way ball valve, a sampling gas bottle and a gas pipeline. A positive and negative pressure dual-purpose gas pump is adopted as the diaphragm pump, and the diaphragm pump can be used for generating the vacuum low-pressure condition and obtaining high-pressure gas. The four-way ball valve is connected with a gas inlet of the diaphragm pump, a gas outlet of the diaphragm pump, the sampling gas bottle and a sample gas connector through clamping sleeve connectors capable of achieving fast connection. A national standard all-metal gas spray pot is adopted as the sampling gas bottle, and the miniaturized sample collecting device is small, light, low in cost and free of pollution. Gas pipelines are all connected through clamping sleeve connectors. The working states of the diaphragm pump are switched by means of the four-way ball valve to carry out air exhaust and air inflation on the sampling gas bottle. By means of circulating switching, cleaning pretreatment of the sampling gas bottle is achieved, and finally, high-pressure sample gas is filled into the sampling gas bottle.

Description

technical field [0001] The invention relates to a miniaturized sample collection device for gas sampling, which can perform fast and portable gas sampling as required, and is suitable for fields where online detection cannot be performed or real-time measurement is not required, and gas sampling is used for offline analysis. Background technique [0002] When performing gas analysis, the gas needs to be sampled first. According to the purpose of the analysis, the composition of the sample and its concentration level, the physical and chemical properties of the sample (solubility of the sample, vapor pressure, chemical reactivity, etc.) decide which sample collection method to use. The commonly used sampling methods include on-line sampling and off-line sampling. Off-line sampling methods mainly include direct collection, enrichment collection and chemical reaction collection. Among them, the direct collection method is one of the most commonly used methods, and it is also t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24
CPCG01N1/24
Inventor 冯高平王明东文明王广宇
Owner PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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