External pressure storage pipe network type superfine dry powder fire extinguishing device and using method thereof

Abstract

The invention discloses an external pressure storage pipe network type superfine dry powder fire extinguishing device and a use method. The device comprises a driving gas cylinder, a powder tank, a gas supply main pipeline, first to fourth electromagnetic valves, an upper gas supply branch pipeline, first to second pressure reducing valves, a delayer, an automatic fire alarm fire extinguishing controller, a powder conveying pipeline, a lower gas supply branch pipeline, an annular pipeline and a pressure sensor. The device has the advantages that the superfine dry powder extinguishing agent in the powder tank is loosened through airflow stirring, local caking of the superfine dry powder extinguishing agent is prevented, and the fluidity of the superfine dry powder extinguishing agent is improved. By means of the combined action of upper pressurization and lower stirring, the superfine dry powder extinguishing agent is evenly dispersed in driving gas, and therefore stable gas-solid two-phase flow is formed in a powder conveying pipeline. The fire extinguishing device is simple and safe to operate, low in use cost, high in fire extinguishing efficiency and applicable to various public places such as equipment rooms, cable tunnels, archives, gas stations, transformer substations and terminal buildings. And the superfine dry powder extinguishing agent which is uniformly dispersed can be sprayed.

Description

technical field [0001] The invention belongs to the technical field of fire extinguishing devices, and in particular relates to an external pressure storage pipe network type superfine dry powder fire extinguishing device and a method for using the same. Background technique [0002] As a traditional fire extinguishing material, dry powder fire extinguishing agent has the characteristics of fast fire extinguishing speed, wide source of dry powder base material, low price, non-toxic or low toxicity to humans and animals, safety, good electrical insulation performance, and wide adaptability. The pharmaceutical field occupies a very important position. However, ordinary dry powder fire extinguishing agent powder particles are usually between 10 and 75 μm. This kind of particle has relatively poor dispersibility and relatively low specific surface area. It is slow, resulting in limited fire-extinguishing ability and poor re-ignition resistance, and large-scale use is easy to po...

AI Technical Summary

Problems solved by technology

[0003] Ultra-fine dry powder fire extinguishing agent is especially suitable for full flooding application, replacing expensive gas fire extinguishing agent, but the ultra-fine dry powder fire extinguishing agent with small particle size is easy to agglomerate and absorb moisture, and local agglomeration may occur during long-term storage in the fire extinguishing agent tank. When the ultra-fine dry powder fire extinguishing system is started in a fire accident, if the fire extinguishing agent is partially agglomerated, it will affect the spraying stability and fire extinguishing effect of the fire extinguishing agent, reduce the fire extinguishing efficiency, and even block the fire extinguishing agent delivery pipeline and cause fire extinguishing failure

Images