Gas sampler with dedusting function as well as gas sampling method

Abstract

The invention provides a gas sampler with a dedusting function. The gas sampler with the dedusting function comprises a sampling pipe, a gas sampling port, a piston, a piston pull rod, an atomizing device, a refrigerating semiconductor, a blow-down valve and a gas sampler shell, wherein the gas sampling port is arranged in one end of the sampling pipe, and is provided with a group of unidirectional gas intake valves and unidirectional gas exhaust valves; the piston is arranged in the sampling pipe; the piston pull rod is connected with the piston and extends out of the other end of the sampling pipe; the atomizing device is used for spraying water mist into the sampling pipe; the refrigerating semiconductor is arranged on the outer side of the sampling pipe; and the blow-down valve is arranged on a part, which is close to the gas sampling port, of the sampling pipe. The invention also provides a rear-mounted dedusting method. The gas sampler with the dedusting function and the rear-mounted dedusting method provided by the invention have the advantages of convenience in carrying, low cost, high efficiency, good dedusting effect, and no influence to the environment humidity.

Description

technical field [0001] The invention relates to the field of gas sampling and measurement, in particular to a gas sampler and a gas sampling method. Background technique [0002] In gas detection, such as atmospheric composition detection, gas detection in coal mines, and toxic gas detection in automobile spraying workshops, it is often necessary to use a gas sampler to sample the ambient gas, and then inject the sampled gas into a professional Analytical instruments for analysis. [0003] In the Chinese utility model patent with application number: 200420052283.6, application date: 2004.07.14, utility model name: "a gas sampler", and application number: 200910197485.7, application date: 2009.10.21, invention name: "gas sampling In the Chinese invention patent of "Device", all disclosed are gas samplers that are easy to carry. However, the above-mentioned gas samplers do not have the function of dust filtration. In the case of a dusty sampling environment, such as undergro...

AI Technical Summary

Problems solved by technology

[0007] In order to reduce the cost and prolong the service life of the equipment, in the environment with a lot of dust, such as underground coal mines, the usual method is to spray water mist in a certain range around the sampling environment to reduce the dust concentration, and then carry out gas collection. However, This method is obviously not suitable for workplaces that have strict requirements on environmental humidity, such as automotive painting workshops, because it will cause a decline in product quality

[0008] On the other hand, the air inlets of the above-mentioned gas sampling devices all adopt a single-pipe air intake method, so that when collecting gas, turbulent flow will occur at the air inlet position in the space where the gas is stored, so that the air pressure or group in the gas storage device There is a deviation between the content of the minute and the environmental value, which will affect the detection accuracy

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