Gas concentration monitoring and early warning device

Abstract

The invention discloses a gas concentration monitoring and early warning device, and relates to the technical field of gas monitoring, the gas concentration monitoring and early warning 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 shell is provided with a placing groove, and the placing groove is provided with a stop block; a channel penetrates through the center of the check block, the carbon dioxide absorption pipe is placed in the containing groove, one end of the carbon dioxide absorption pipe abuts against one side of the check block and communicates with the channel, the other end of the carbon dioxide absorption pipe communicates with gas to be detected through an air inlet pipe, and an electromagnetic air valve is arranged on the air inlet pipe. The other end of the circuit system is communicated with the light path system through a communicating pipe, a gas flowmeter is arranged on the communicating pipe, and the circuit system comprises a control module. According to the invention, gas detection can be immediately interrupted when the absorbent in the carbon dioxide absorption tube or the moisture absorption tube is saturated and loses efficacy.

Description

technical field [0001] The invention relates to the technical field of gas monitoring, in particular to a gas concentration monitoring and early warning 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...

AI Technical Summary

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. But failure, or regular mandatory replacement of carbon dioxide absorber and moisture absorber, 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 absorber and moisture absorber, and cannot observe The color of the absorbent located 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 moisture absorption tube, if the gas concentration monitoring device The number of times of use is small, and when the specified replacement time is reached, the absorbent in the carbon dioxide absorption tube and moisture absorption tube is not saturated, resulting in waste. If the gas concentration monitoring device is used very frequently, it has not yet reached the specified time. Replacement time, the absorbent in the carbon dioxide absorbing tube and moisture absorbing tube has been saturated, resulting in inaccurate gas concentration monitoring results

Images