In order to effectively prevent and resolutely curb gas safety accidents, Chengdu Emergency Management Bureau, Chengdu Economic and Information Bureau, Chengdu Public Security Bureau, Chengdu housing and Urban Rural Development Bureau, Chengdu Transportation Bureau, Chengdu Market Supervision Bureau and Chengdu fire rescue detachment jointly issued the announcement on strict compliance with gas safety laws and regulations.

For Chengdu, which has a large population and a complex urban geographical structure, the current management difficulty is the weak safety awareness and loose management of gas use in scattered restaurants, which brings safety risks. At present, the most immediate and effective way is to replace civil air defense with technical defense. Use the most advanced technical means to monitor the full coverage of gas involved in urban catering, and rely on people's consciousness to a minimum.

Passive optical fiber laser leakage monitoring system

Hanhai photoelectric passive optical fiber laser leakage monitoring system is composed of laser monitoring platform, passive laser detector and solenoid valve. The monitoring platform is located in the property monitoring center, the passive laser detector is located in the gas and fire unit, and the solenoid valve is located at the inlet of the unit's gas pipeline. The platform is connected with the detector and solenoid valve by optical fiber to form a gas safety monitoring network. In case of gas leakage, the system will immediately drive the solenoid valve to cut off the gas source to prevent combustion and explosion. When the unit air of gas and fire reaches the safety standard, the system will automatically restore the air supply.