Gas type super-fine dry powder automatic fire extinguishing system

Abstract

The invention provides a gas type super-fine dry powder automatic fire extinguishing system which comprises a gas generator, a dry powder tank, a rupture disk, a pipeline and a nozzle. The dry powdertank is filled with a dry powder fire extinguishing agent. The top end of the dry powder tank is provided with the gas generator. One end of the pipeline is located in the dry powder tank and faces the bottom of the dry powder tank, and the other end of the pipeline is located outside the dry powder tank and is connected with the nozzle. The interior of the pipeline is blocked by the rupture disk.The gas generator comprises a gas generating grain and an igniting device. The igniting device receives a triggering signal sent out by a fire disaster sensing and alarming system and ignites the gasgenerating grain. Gas and dry powder are sufficiently mixed to form gas-solid two-phase flow. When the pressure reaches the relief pressure of the rupture disk, the rupture disk is opened, and the gas-solid two-phase flow is sprayed out of the pipeline through the nozzle. No pressure or valve or complicated power device exists in the dry powder tank at ordinary times, instant triggering and rapidfire extinguishing are performed in a fire behavior, and the dry powder jet pressure is high, continuous and stable.

Description

Technical field [0001] The invention relates to an automatic fire extinguishing system, belonging to the technical field of fire extinguishing equipment. Background technique [0002] In the petrochemical industry, many products are flammable and explosive. Large-scale fires are prone to occur under lightning, static electricity, impact, leakage, line aging, and accidental sparks. Because water cannot be used to extinguish fires, portable dry powder fire extinguishers and pushers are commonly used. Car dry powder fire extinguishers, but once a fire occurs, it is difficult for people to approach the fire extinguishing device. At present, the fire extinguishing devices that can be automatically triggered are all based on sprinklers and cannot be used in the petrochemical field. Although the high-pressure gas cylinder dry powder fire extinguisher can be automatically triggered and used in the petrochemical field, it is expensive and difficult to maintain, and due to its many valves ...

AI Technical Summary

Problems solved by technology

At present, highways and railway tunnels basically use foam manual fire extinguishing. It is difficult to maintain in high cold and water-scarce areas. In addition, the traffic flow of highways is generally large. Once a fire occurs in the tunnel, the vehicles will be congested and the smoke will fill the air. Manual fire extinguishing facilities are basically useless. Professional Firefighters, vehicles, and fire extinguishing facilities are difficult to arrive in time, and often miss the best time to extinguish the fire, causing disasters

However, there is still the problem that the electric fire extinguishing in the utility tunnel cannot be extinguished with water

[0004] Cable trenches, cable interlayers, cable shafts, power distribution cabinets, and oil-immersed transformers in the power transformation industry are the most representative fire-fighting difficulties in power, telecommunications, petrochemical, metallurgy, municipal and other systems. The causes of fires in these occasions are insulation Layer aging, lightning, static electricity, etc. Once a fire breaks out, it is difficult for personnel to enter and fight the fire, let alone use traditional water, foam, etc. to extinguish the fire. At present, heptafluoropropane is mostly used, and the maintenance cost is high.

[0005] Logistics warehouses that are afraid of water and lack of water need to protect a large space. The existing suitable fire extinguishing equipment generally uses heptafluoropropane or aerosol, but the installation and maintenance cost of heptafluoropropane is high, and it is not suitable for use in large spaces, and the process of aerosol is slow. Not suitable for large spaces

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