Urban comprehensive pipe gallery, as a treasure of urban underground space, plays an important role as a public tunnel carrying municipal pipelines. Its content covers many important facilities such as electricity, communications, radio and television, water supply, drainage, heat, and gas, which jointly maintain the normal operation of the city. The pipe gallery is mainly divided into three compartments: gas tank, sewage tank and comprehensive tank. Each compartment has its own unique function and importance. However, safety issues are always top of mind. Various gases in the integrated pipeline corridor, such as methane, oxygen, hydrogen sulfide, carbon monoxide, etc., may cause safety accidents once the concentration exceeds the standard. Therefore, real-time monitoring of gas concentration is particularly important. To address this issue, we propose a comprehensive monitoring program.

Solution: First, we need to determine the specific location of the monitoring. This is not limited to each cabin, but also goes into every detail, including every corner of the gas tank, sewage tank and integrated tank. Then, identify the factors to monitor. In addition to the various gases mentioned above, temperature, humidity and liquid level are also important monitoring indicators. These factors not only directly affect the normal operation of the pipe gallery, but are also related to the life safety of the staff. In order to realize real-time transmission and processing of data, we use intelligent online gas detection alarms, temperature and humidity transmitters, liquid level meters and other equipment. These devices can not only monitor gas, temperature, humidity and liquid level data in the pipe gallery in real time, but can also activate emergency ventilation equipment in a linkage manner to eliminate danger in a timely manner. In terms of data transmission, we use a variety of methods such as 4-20mA current signal, RS485 bus system, optical fiber or wireless communication (GPRS) to ensure that data can be accurately transmitted to the monitoring center.

The monitoring center processes and analyzes the data through supporting comprehensive management software. The geographical location, measured concentration value or working status of each measuring point can be continuously monitored online for a long time. Once an abnormality occurs, the system will automatically generate an alarm signal and notify relevant personnel immediately through sound and light alarms or SMS alarms to ensure that the danger is handled in a timely manner. Solution composition: The solution is mainly divided into three parts: front-end media monitoring, mid-end data transmission and terminal monitoring and management. Front-end media monitoring mainly relies on equipment such as gas detection alarms; mid-end data transmission is achieved through 485 shielded cables, optical fiber wireless networks and other media; terminal monitoring management is through the client gas online monitoring software platform and monitoring center monitoring platform system To be done.

Value of the program: The value of this program is mainly reflected in four aspects: First, it can ensure the normal operation of the pipeline corridor and strengthen safety management through scientific gas concentration monitoring; second, it improves the automation of hazard source safety management and reduces It reduces the occurrence and harm of accidents; thirdly, it improves the informatization capability of safety management of pipe corridor hazards; finally, it can coordinate emergency dispatch, provide accurate information for emergency rescue, and serve scientific decision-making and command and dispatch of emergency rescue.

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