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Automatic gas sampling device and using method thereof

An automatic sampling and gas technology, 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., to achieve unattended operation and save energy Human resources, the effect of improving the utilization rate

Active Publication Date: 2014-07-16
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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AI Technical Summary

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 described below with reference to the accompanying drawings.

[0023] like figure 1 shown, figure 1 A schematic structural diagram of a gas circuit system according to an embodiment of the present invention is shown. In one embodiment of the present invention, the negative pressure gas automatic sampling device includes a housing, and the interior of the housing includes a gas circuit system and an electrical circuit system; a schematic structural diagram of the gas circuit system is as follows: figure 1 As shown, including the sample analysis instrument 7, the sample analysis instrument in 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 in 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 to the air extraction device...

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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 an automatic gas sampling device and a method of using the same, and more particularly, the invention relates to a negative pressure gas automatic sampling device used for the front end of the sampling port of a gas analysis instrument. Background technique [0002] Gas chromatography is an efficient, sensitive and rapid separation and analysis technology, which can separate dozens or even hundreds of mixtures of components in a very short time. One of the main means and methods of analysis. The gas chromatograph is used to analyze the content of components in the gas. Generally, there are two injection methods: manual injection with a gas injection syringe or automatic injection with a six-port valve. Syringe injection method is simple and flexible, but it has disadvantages such as poor sealing, backflushing and permeation, and poor injection stability. When the pressure of the analyte is lower than atmospheric pressure, the...

Claims

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Application Information

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Patent Type & Authority Patents(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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