Key points about gas fire suppression systems

Edit:Jiangsu Yongtai Fire Engineering Co., Ltd.UpDate:2019-12-09

1. The gas fire extinguishing system has the advantages of good stability, low corrosivity, non-conductivity, low toxicity, and no traces after evaporation, so it is usually used in computer rooms, communication rooms, transformer and distribution rooms, etc. Special place.

2. Gas fire extinguishing system refers to the fire extinguishing system in which the fire extinguishing agent is usually stored in a pressure vessel in the state of liquid, liquefied gas or gas, and the gas (including steam and aerosol) is sprayed as the fire extinguishing medium during fire extinguishing.

3. The composition of the gas fire extinguishing system includes a bottle group, a selection valve, a nozzle (nozzle), a one-way valve, a header, a connecting pipe, a safety relief device, a driving device, a leak detection device, a signal feedback device, and a low-leakage high-sealing device. Valve, etc.

4. Working principle of gas fire extinguishing system:

1) After a fire, the smoke detector first detects the smoke and transmits it to the controller. The controller starts an alarm (a signal). When it burns for a while, the room temperature rises. The temperature detector detects that the temperature rises and transmits it to the controller. Device (second signal);

2) After receiving the two signals, the controller starts the linkage control. After a period of time (personnel evacuation, closing the protective area opening, etc.), the controller opens the bottle head valve of the driving gas bottle (red vial) and drives the gas bottle. The gas will open the selection valve corresponding to the fire area, and then open the container valve of the fire extinguisher bottle (red large bottle), and the fire extinguishing agent can be transported to the fire area through the pipeline to extinguish the fire;

3) At the same time, after the pressure switch on the pipeline receives the pressure of the fire extinguishing agent through the pipeline, this pressure signal is converted into an electrical signal and transmitted to the controller. The controller will obtain the information that the fire extinguishing system is extinguishing the fire and open the protective zone in parallel Air jet lights outside the door to prevent personnel from entering the fire area by mistake.

5. Bottle group: The bottle group generally consists of a container, a container valve, a safety relief device, a siphon, a sampling port, a leak detection device, and a filling medium, etc., and is used to store and control the release of the fire extinguishing agent. There are three types of bottle groups: fire extinguisher bottle group, driving gas bottle group and pressurized gas bottle group.

6. Selection valve: The selection valve is a valve used in the combined distribution system to control the release of the extinguishing agent to the fire protection area.

7. Signal feedback device: The signal feedback device is a device installed on the fire extinguishing agent release pipeline or selection valve to convert the pressure or flow signal released by the fire extinguishing agent into an electric signal and feed it back to the control center.