When you were young, were you always told by your parents to stay away from the manhole cover?

At that time, I thought that stepping on the manhole cover would lose the "soul"

Only later did I know that what I lost may be "life"

In recent years, there have been a number of underground accidents in various regions, including we often brush bear children to throw firecrackers into the well and get injured, underground construction workers are stunned by toxic gas, resulting in occupational disasters, etc. the inspection wells that can be seen everywhere in life have inadvertently become "invisible bombs".

With the increase of urban scale in China, all kinds of drainage pipe network facilities are increasing, and the inspection wells of drainage pipe network on the road are also increasing. Various inspection wells are an important part of municipal infrastructure, and well cover management is an important part of urban management, which is related to the vital interests of the people and reflects the management level of the city.

However, the space under the well cover is closed, and it is easy to accumulate toxic and harmful gases in the well, such as methane (biogas), hydrogen sulfide, ammonia and other combustible gases. These gases are very easy to burn and explode when they encounter open fire and air.

Secondly, the medium conveyed by the underground gas pipeline is gas. Due to the extremely easy diffusion of gas, the leaked gas generally diffuses along the channels easy to diffuse, generally including underground cracks, drainage pipes, telecommunication pipes or power ditches and heating ditches near the gas pipeline, and finally diffuses to the ground through the inspection well.

Due to the interference of power supply and environment, the traditional gas detection method can not achieve real-time online monitoring, which makes the nodes that should be the urban life defense line become the blind spot of urban lifeline safety. To solve this problem, Hanhai optoelectronics has given a solution - laser gas leakage monitor.

Laser gas leakage monitor

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 and unattended station. 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.

01 low power consumption

The laser gas leakage monitor of the Internet of things adopts solar energy and battery power supply, and uses intelligent monitoring system, ultra-low power consumption and ultra-long operation time to promote the effective monitoring of the end link.

02 preventive monitoring

The response time is less than 10 seconds, which can accurately detect ppm trace gas leakage, upload the monitoring and alarm data to the cloud platform, make the gas concentration data display more intuitive, help the full coverage monitoring of urban gas leakage, and truly realize the preventive monitoring of gas leakage.

03 easy installation

The modular design from detector to control system is adopted. The simplified system structure makes the installation easier.

04 strong anti-interference ability

It will not be disturbed by humidity, dust, temperature and other gases, and can work in high humidity environment for a long time.

05 omnidirectional NB lot Internet of things access

Using Internet of things technology, all areas covered by the network can be used without limitation of distance and scope.

06 waterproof alarm function

The water level monitoring function can monitor the accidental water inflow in the valve well in real time.

During the 14th games in 2021, laser gas leakage monitor (stainless steel and compact) is used to monitor the valve well in real time.

In the same year, Hanhai optoelectronics and Shenzhen Institute of urban public safety technology established a joint R & D Center for flammable, explosive, toxic and harmful gas detection. Comprehensively contribute to the safety of urban lifeline.