Mine gas concentration monitoring device

Abstract

The invention discloses a mine gas concentration monitoring device, and relates to the technical field of gas monitoring, the mine gas concentration monitoring device comprises a shell, and a gas path system, a light path system and a circuit system which are mounted in the shell, the gas path system comprises a gas inlet pipe, a carbon dioxide absorption pipe, a moisture absorption pipe and a communicating pipe, the carbon dioxide absorption pipe is detachably communicated with the moisture absorption pipe, the carbon dioxide absorption pipe is communicated with a gas environment to be detected through a gas inlet pipe, an electromagnetic gas valve is arranged on the gas inlet pipe, the moisture absorption pipe is communicated with the light path system through a communicating pipe, and a gas flow meter is arranged on the communicating pipe; the circuit system comprises a control module, when the gas flow meter detects that the flow of gas passing through the gas flow meter is accumulated to a preset value, the gas flow meter sends a saturation signal to the control module, and the control module controls the electromagnetic gas valve to be closed after receiving the saturation signal. The situation that the gas concentration monitoring result is inaccurate after absorption saturation and failure of the carbon dioxide absorption pipe and the moisture absorption pipe is avoided to a great extent.

Description

technical field [0001] The invention relates to the technical field of gas monitoring, in particular to a mine gas concentration monitoring device. Background technique [0002] At present, the gas concentration detection usually uses an optical gas concentration monitoring device based on the principle of optical interference, which is composed of a gas circuit system, an optical circuit system and an electrical circuit system. The carbon dioxide and water vapor that will interfere with the subsequent optical system measurement of gas concentration are removed. [0003] For example, the Chinese patent with publication number CN211825646U and titled "Portable Optical Gas Detector for Easy Absorbent Replacement" includes an air inlet gas path connected to one side of the detector shell, and the detector shell protrudes to one side. The upper protruding part includes a third connecting seat on the lower side, the lower protruding part includes a second connecting seat on the ...

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Problems solved by technology

[0004] In the prior art, in order to ensure that the gas path system can effectively remove carbon dioxide and water vapor in the gas to be measured, it is generally judged by observing the color of the absorbent to determine whether the carbon dioxide absorbent in the carbon dioxide absorption tube and the moisture absorbent in the moisture absorption tube are saturated. , or regularly replace the carbon dioxide absorption tube and the moisture absorption tube, both methods have shortcomings: the method of observing the color of the absorbent can only observe the color of the absorbent on the periphery of the carbon dioxide absorption tube and the moisture absorption tube, and cannot observe the The color of the absorbent in the center changes, and the light in the mine is usually dim, the color of the absorbent is not obvious, and it is easy to misjudgment; for the method of regularly replacing the carbon dioxide absorption tube and the water absorption tube, if the gas concentration monitoring device is used Less, when the specified replacement time is reached, the absorbent in the carbon dioxide absorption pipe and moisture absorption pipe is not saturated, resulting in waste. If the gas concentration monitoring device is used very frequently, the specified replacement time has not yet arrived , the absorbent in the carbon dioxide absorption pipe and moisture absorption pipe has been absorbed and saturated, resulting in inaccurate gas concentration monitoring results

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