Safety Monitoring System for Closed Space of Underground Well Chamber

ⅠSystem Overview:
At present, most of the management units of underground wells, except for gas companies, still use manual inspections of "timed, fixed line, fixed quantity, fixed speed, and fixed responsibility" to eliminate hidden dangers in underground wells, and there are basically few other units. Most of them are concerned about the hidden dangers of well room safety or the lack of well cover. In the daily management of underground wells, manual inspections have the characteristics of large workload, low inspection efficiency, strong human nature, and fixed working hours. They cannot effectively find hidden problems and miss the best working time; Afterwards, it was found that there were generally major security risks at this time, and even serious social impacts were caused. The new monitoring terminal equipment using GIS, GPRS, NB-IoT and other technologies has the advantages of convenient installation and construction, not limited by time and geographical environment, 24-hour online monitoring, and alarm when changing, which makes up for manual inspections and citizen calls Insufficient reporting, so as to realize the advance warning of high concentration of underground well gas, and save the risk.

Ⅱ Solution:
The safety monitoring system for the confined space of underground wells is mainly used for monitoring the concentration of combustible gases (natural gas, artificial gas, biogas, etc.) in valve wells (rooms) such as gas valve wells, sewage wells, rainwater wells, etc. Ambient temperature monitoring, water level monitoring and manhole cover change monitoring, etc., realize 24-hour online monitoring and accident early warning of various hidden dangers in valve wells (rooms), and effectively prevent explosions, water overflows, facility damage and other accidents.

2.1 System Architecture

2.2 System Composition

2.2.1 Confined space monitoring terminal

2.2.2 Safety monitoring system for confined space in underground well room

With the help of GIS, big data, cloud computing and Internet of Things sensing technology, this system can detect various valve wells (rooms) in cities, especially gas valve wells, urban pipeline trenches near gas pipelines, and large urban complexes (underground parking lots). , subway stations, underground passages, etc.) to achieve 24-hour online security monitoring in confined space areas that are not easy to supervise. Once the terminal equipment detects abnormal conditions such as ultra-high gas concentration and ultra-high water level, the alarm information will be uploaded to the cloud platform as soon as possible, and the system will automatically notify the gas company or other responsible units to carry out corresponding alarm processing through the set hidden danger processing process. The system supports the linkage with the GIS pipe network inspection system and emergency dispatching system, so as to improve and enhance the early warning and alarm capabilities of the urban gas pipeline network and various municipal well-room facilities, and prevent vicious accidents such as explosion, water overflow and facility loss. happened.

2.2.3 Main function realization

2.2.4 Hidden danger handling process

Ⅲ Program Value

End product advantages

System platform advantages