Gas sample inlet for atmosphere detection equipment

A gas sampling port and atmospheric detection technology, which is applied in the direction of measuring devices, suspension and porous material analysis, particle suspension analysis, etc., can solve problems such as incomplete shading, long gas path, and impact on detection accuracy, so as to reduce detection The effect of reducing error, shortening the sampling gas path, and improving the accuracy of gas detection

Active Publication Date: 2016-06-15
BEIJING MUNICIPAL ENVIRONMENTAL MONITORING CENT
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Problems solved by technology

[0004] A gas sampling port in the prior art is connected to the detector through a short straight pipe. The sampling port is provided with an insect-proof net and a rainproof cap. However, the rainproof cap has a certain light-shielding effect, but the light-shielding is not complete, and because Sampling ports and pipelines do not use special light-absorbing materials, and some scattered and reflected stray light will enter the light chamber to interfere with detection
[0005] Another kind of gas sampling port in the prior art, after the gas enters the gas detection equipment through the sampling port, it reaches the detector through a long anti-light gas path, thereby eliminating stray light such as natural light from interfering with the detection of the optical sensor. However, this The air path of the gas sampling port is long, and there may be bends and corners, which may cause the loss of particulate matter in the sampled gas, thus affecting the detection accuracy

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  • Gas sample inlet for atmosphere detection equipment

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Embodiment approach

[0021] According to an embodiment of the present invention, a gas sampling port for atmospheric detection equipment, wherein the atmospheric detection device has a detector, the gas sampling port comprises: a hollow shell, which is respectively provided with a top opening and a bottom opening, An optical path is formed from the bottom opening to the top opening; the shielding body is embedded in the hollow shell and straddles the optical path; one end of the tube body is connected with the top opening of the hollow shell, and the other end is connected with the detector. According to the above-mentioned embodiment, the gas and light enter from the bottom opening of the hollow shell, wherein, since the light propagates along a straight line, the light will be blocked by the blocking body after entering the hollow shell, so that it cannot reach the top opening of the hollow shell, but the gas When encountering the blocking body, it will bypass the blocking body and reach the top ...

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Abstract

The invention provides a gas sample inlet for atmosphere detection equipment. The gas sample inlet comprises a hollow casing, a shielding body and a tube, wherein a top opening and a bottom opening are formed in the hollow casing, the shielding body is inlaid in the hollow casing and stretches across a light path between the top opening and the bottom opening, one end of the tube is connected with the top opening in the hollow casing, and the other end is connected with an optical detector of the atmosphere detection equipment. The gas sample inlet is lightproof, rainproof and insect-proof, and the gas detection accuracy is improved.

Description

technical field [0001] The invention belongs to the field of atmospheric measurement, in particular to a gas sampling port used for atmospheric detection equipment. Background technique [0002] At present, the methods for measuring the mass concentration of atmospheric particulate matter at home and abroad mainly include the off-line filter membrane weighing method, the on-line β-ray method and the micro-oscillating balance method, etc. The filter membrane weighing method is currently an internationally recognized benchmark method for detecting the mass concentration of atmospheric particulate matter, but its disadvantages are time-consuming, labor-intensive, and poor timeliness. The β-ray method and the micro-oscillating balance method can be monitored automatically in real time. The disadvantages are high production costs and large equipment volume, which are not suitable for outdoor flow measurement and dense distribution. Light-scattering particle sensors based on Mie ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06
CPCG01N15/06G01N2015/0693
Inventor 张大伟刘保献王莉华陈添安欣欣姜南马腾飞周一鸣孙磊曹阳
Owner BEIJING MUNICIPAL ENVIRONMENTAL MONITORING CENT
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