Automatic gas sampling device and using method thereof

An automatic sampling and air extraction device technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of the accuracy of test results, large gas consumption, poor stability of sample injection, etc., and achieve unattended operation , save human resources, improve the effect of utilization

Active Publication Date: 2013-01-16
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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Problems solved by technology

The syringe injection method is simple and flexible, but it has disadvantages such as poor sealing, backflush and penetration, and poor injection stability.
When the pressure of the analyzed object is lower than the atmospheric pressure, the manual injection of the syringe will mix the air components, which will affect the accuracy of the test results
The commercialized valve sampling system adopts the flow method to inject samples. Although it is easy to operate and has good reproducibility, it is not suitable for normal pressure / negative pressure sample analysis, and the gas consumption is large.

Method used

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  • Automatic gas sampling device and using method thereof
  • Automatic gas sampling device and using method thereof

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Embodiment Construction

[0022] The present invention will be further elaborated below in conjunction with the accompanying drawings.

[0023] Such as figure 1 as shown, figure 1 A schematic structural diagram of an air circuit system according to an embodiment of the present invention is shown. An embodiment of the present invention, the negative pressure gas automatic sampling device includes a housing, and the inside of the housing includes a gas circuit system and an electrical circuit system; the structural diagram of the gas circuit system is as follows figure 1 As shown, including a sample analysis instrument 7, the sample analysis instrument of this embodiment is a gas sample analysis instrument, which can be a gas analyzer or a gas detector; as a preferred embodiment, the sample analysis instrument of this embodiment is a gas chromatograph, The gas chromatograph includes a six-way valve 8, one end of the quantitative loop of the six-way valve is connected with the pumping device 9 through a...

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Abstract

The invention relates to an automatic gas sampling device and a using method thereof. The device provided by the invention comprises a shell, wherein the shell is internally provided with a gas channel system and a circuit system; the gas channel system comprises a first electromagnetic valve, a second electromagnetic valve, a pressure sensor, a tee joint, a six-way valve and a vacuum pump; the circuit system comprises the first electromagnetic valve, the second electromagnetic valve, the pressure sensor and a computer; the first electromagnetic valve and the second electromagnetic valve are electrically connected with the I / O (input / output) switch control unit of the computer; and the pressure sensor is electrically connected with the analogue / digital converter of the computer. The gas automatic sampling device provided by the invention can be widely applied to automatic sampling for gas chromatograph analysis of gas samples, prevents the pollution of environment on tested sample gases, and effectively improves the utilization ratio of sample gases and analyzing instruments.

Description

technical field [0001] The invention relates to a gas automatic sampling device and a use method, more specifically, the invention relates to a negative pressure gas automatic sampling device used at the front end of a gas analysis instrument inlet. Background technique [0002] Gas chromatography is an efficient, sensitive and rapid separation and analysis technology that can separate dozens or even hundreds of components in a short period of time. Therefore, it is the best among many methods for analyzing gases. One of the main means and methods of analysis. Gas chromatography is used to analyze the content of components in the gas. Generally, there are two sampling methods: manual injection with gas sampling syringe or automatic injection with six-way valve. The syringe injection method is simple and flexible, but it has disadvantages such as poor sealing, backflushing and penetration, and poor injection stability. When the pressure of the analytical object is lower tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/24
Inventor 王新锋余堃孙杰罗宏余凤湄刘宁王蔺
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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