Pipe network type dry powder fire extinguishing system and method

Abstract

The invention discloses a pipe network type dry powder fire extinguishing system which comprises fire source detectors arranged in all subareas of a protected area, a temperature detector arranged in the protected area, a controller, a gas supply device, a mist mixing tank, subarea electric valves and spray nozzles, wherein the controller is used for receiving electrical signals from the fire source detectors and the temperature detector, or the electrical signals from the more than two fire source detectors and then sending a fire extinguishing control command; the gas supply device is electrically connected with the controller; the number of the subarea electric valves is equal to the number of the subareas; and the spray nozzles are connected with the output ends of all the subarea electric valves through pipelines. The pipe network type dry powder fire extinguishing system can perform fire extinguishment once or many times, and can perform fire extinguishment on each divided area separately.

Description

technical field [0001] The invention relates to the technical field of fire protection, in particular to a pipe network type dry powder fire extinguishing system and method for fire protection. Background technique [0002] Fire has a major impact on people's production and life and economic development, so in the field of fire protection, fire extinguishing equipment is one of the indispensable equipment. Common fire extinguishing equipment are as follows: [0003] First, fire hydrant: Fire hydrant is a fire water supply device installed on the fire water supply network, consisting of a valve, water outlet and housing. According to its water pressure, fire hydrants can be divided into low-pressure type and high-pressure type; according to their setting conditions, they can be divided into indoor type and outdoor type, as well as above-ground type and underground type. [0004] Second, carbon dioxide fire extinguisher: it is to compress liquid carbon dioxide in a small ste...

AI Technical Summary

Problems solved by technology

Since the fire extinguisher is used once for a long time, after the powder storage tank is suspended for a long time, the dry powder is deposited on the bottom of the tank under the action of gravity. When the fire extinguisher needs to be extinguished, the dry powder does not form a loosening process, resulting in more gas and less powder, which affects fire extinguishing Effect

Secondly, after the control valve is opened, all the gas stored in the tank will be ejected, so only one fire extinguishing process can be formed. When the extinguished fire re-ignites, the second or multiple fire extinguishing cannot be formed.

Third, during the fire extinguishing process, if there is a strong wind, the fire extinguisher will still spray the airflow carrying the dry powder. Since the dry powder itself is very light, the flow of the dry powder will be greatly affected after the wind is too strong, so that the dry powder cannot reach the target according to the predetermined route. protection, it is impossible to extinguish the fire

Fourth, if N such dry powder fire extinguishers are placed in a fire extinguishing area, once the temperature-sensitive glass bulb detects the temperature, it will open the control valve, so that all dry powder fire extinguishers will work. , which will waste

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