Urban underground pipe network gas detection device and detection method thereof

Abstract

The invention provides an urban underground pipe network gas detection device and a detection method thereof. The device comprises an air inlet valve, a gas filtering device, a gas detection chamber, a gas pump and an air exhaust valve which are sequentially connected as well as a microprocessor module, a liquid level detection sensor and a gas sensor which is arranged in the gas detection chamber; and the microprocessor module respectively controls the air inlet valve, the air exhaust valve, the gas pump, the liquid level detection sensor and the gas sensor. The method comprises the following steps of: placing the urban underground pipe network gas detection device into an urban underground pipe network; acquiring the liquid level value in the urban underground pipe network by virtue of the microprocessor module; if the liquid level value is more than a preset liquid level value, controlling the air inlet valve and the air exhaust valve to be opened and controlling the gas pump to be started by virtue of the microprocessor module; and then acquiring the gas concentration value in the urban underground pipe network. The device provided by the invention has the advantages of simple structure, control convenience and high safety and reliability, and the method provided by the invention is simple and practical, has strong applicability and is easy to realize.

Description

technical field [0001] The invention relates to a gas detection device, in particular to a gas detection device and a detection method for an urban underground pipe network. Background technique [0002] The urban underground pipe network is an important part of urban infrastructure and the basic guarantee for the high-quality and efficient operation of a modern city; however, in a relatively closed urban underground pipe network environment, it is easy to accumulate flammable gases or toxic and harmful gases, and then, It is easy to cause accidents such as explosion and poisoning, which has caused great safety hazards to public safety. Therefore, it is necessary to effectively monitor the gas in the urban underground pipe network. [0003] At present, most of the work of sampling and testing the gas in the urban underground pipe network is carried out separately, that is, it is necessary to collect the sample gas first, and then carry out the detection of the relevant indic...

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Problems solved by technology

[0002] The urban underground pipe network is an important part of urban infrastructure and the basic guarantee for the high-quality and efficient operation of a modern city; however, in a relatively closed urban underground pipe network environment, it is easy to accumulate flammable gases or toxic and harmful gases, and then, It is easy to cause accidents such as explosion and poisoning, which has caused great safety hazards to public safety. Therefore, it is necessary to effectively monitor the gas in the urban underground pipe network

[0003] At present, most of the work of sampling and testing the gas in the urban underground pipe network is carried out separately, that is, it is necessary to collect the sample gas first, and then carry out the detection of the relevant indicators of the sample gas, and most of them are manual operations, with cumbersome steps and time-consuming It is laborious, and the flammable gas or toxic and harmful gas in the pipe network will damage the health of nearby personnel after diffusion; in addition, there is also a method of directly exposing the gas sensor to the underground pipe network environment for detection, but this method is harmful to the gas sensor. The sensor is very damaged, which also affects the detection accuracy

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