According to the official account of WeChat public in "Fangshan, Beijing", at 6:20 on March 15th, people were called to the police. The red apple estate in Fangshan District Zhoukou town had a deflagration of gas in one household, causing 2 deaths and 2 injuries, and the wounded were in full rescue. After the accident, Fangshan District immediately started the emergency plan and organized rescue forces to carry out on-site disposal.

The cause of the accident is under investigation.

    Not long ago, a natural gas leakage point was found in a community in Wangjing, Beijing. On the morning of March 2, residents of Wangjing West Road community reported through 12345 hotline that there was a smell of natural gas near the central garden of the community, but it was unclear where the leakage source came from. After inspection and testing by the emergency repair personnel, it was found that the leakage point was near building 7 in the central garden. In order to prevent major safety accidents, the gas company immediately closed the main valve of the building, stopped the gas in building 7, and ventilated the sealed attic. After day and night of emergency repair, the leakage point was finally completely repaired.

Spring is the season of high incidence of gas accidents. Due to the large temperature difference between day and night and crustal changes, the risk of gas leakage is high.

There are many gas transmission nodes such as pressure regulating boxes, pressure regulating cabinets, valve wells, unattended valve chambers, outdoor risers in residential areas and gas pipe wells distributed in the underground gas pipe network of the city. In case of gas leakage at these locations, it is very easy to form gas accumulation, resulting in potential safety hazards and accidents. These places are not only the important links of urban lifeline gas, but also the key nodes of gas pipelines connecting residential users.

 Recently, Su Jie, director of the Safety Coordination Department of the emergency management department and spokesman, pointed out at a briefing held by the state information office that during the "14th five year plan" period, guide key cities across the country to accelerate the construction of comprehensive monitoring and early warning platforms for urban safety risks, so that all localities can "monitor, early warning and quickly deal with the risks of gas and related urban lifelines".

 Aiming at the safety blind spot of urban lifeline, Hanhai optoelectronics has launched relevant solutions - Internet of things combustible gas laser monitoring series products and passive optical fiber laser leakage monitoring system. By using technical defense instead of civil air defense, the passive disposal of gas leakage by gas enterprises can be solved.

The combustible gas laser monitoring series products of Internet of things are composed of detector, power supply and communication module and monitoring platform. Internet of things combustible gas laser monitoring series products are aboveground and underground laser monitoring products integrating laser absorption spectrum gas detection technology (TDLAS), low-power technology and Internet of things technology. This series of products are applicable to urban gas pressure regulating box, pressure regulating cabinet, valve well, unattended valve chamber, etc. It is transmitted to the monitoring platform through NB lot Internet of things communication to realize real-time, fast, long-distance and accurate monitoring of trace gas leakage above the ground, underground, closed and semi closed spaces. It is the best blind spot solution for urban gas safety, so as to control the overall safety situation of urban gas and help the safety protection system of urban lifeline.

Hanhai photoelectric passive optical fiber laser leakage monitoring system is composed of laser monitoring platform and passive laser detector. Passive laser detectors can be installed in areas such as outdoor risers and gas tube wells in the community. 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 air in the fire area reaches the safety standard, the system will automatically restore the air supply.

01 no power required

The system host can be installed tens of kilometers away, while the monitoring site of the gas and fire unit only needs to install passive light sensing terminals (pure optical equipment, no power supply). For the areas where restaurants gather, the real-time online monitoring of combustible gas can be realized through the remote monitoring platform.

02 no calibration required

The passive optical fiber laser leakage monitoring system does not need regular calibration and maintenance, which can ensure its normal use.

No false alarm can improve the reliability of gas detection.

03 long service life

Using semiconductor light source and optical glass, no contact measurement, no physical loss, and the service life can reach decades. Therefore, the service life of passive optical fiber laser leakage monitoring equipment is 10 times that of traditional detection equipment.

04 more stable

The traditional detection equipment has poor stability and is vulnerable to impact and poisoning caused by high gas leakage concentration; Then detect the failure. Passive optical fiber laser leakage monitoring equipment does not have this problem. The working performance is more stable.