Atomizing nozzle special for perfluorohexanone fire extinguisher and using method of atomizing nozzle

Abstract

The invention relates to an atomizing nozzle special for a perfluorohexanone fire extinguisher and a using method and application of the atomizing nozzle, and belongs to the technical field of firefighting equipment. A connecting pipe is internally provided with an agent conveying pipeline and a first agent confluence cavity which communicate, an atomizing spray pipe is internally and sequentiallyprovided with a second agent confluence cavity, a conical atomizing pipeline and a straight cylinder spraying guiding pipeline which communicate, an atomizing core groove is formed in the bottom of the second agent confluence cavity, an atomizing through hole is formed in the bottom of the atomizing core groove, an atomization core is correspondingly arranged in the atomizing core groove, after the connecting pipe and the atomizing spray pipe are matched in a threaded connection mode, the first agent confluence cavity and the second agent confluence cavity are combined to constitute an atomizing confluence cavity, and the atomizing confluence cavity communicates with the conical atomizing pipeline and the straight cylinder spraying guiding pipeline through the atomizing through hole. According to the atomizing nozzle special for the perfluorohexanone fire extinguisher and the using method of the atomizing nozzle, during fire extinguishing, gas-liquid two-phase spraying can be ensured,spraying in a column form in a fire-extinguishing area is ensured, and maximum use of a perfluorohexanone agent and the fast and efficient fire-extinguishing effect are realized.

Description

technical field [0001] The invention belongs to the technical field of fire-fighting equipment, in particular to a special atomizing nozzle for a perfluorohexanone fire extinguisher and a using method thereof. Background technique [0002] Traditional fire extinguisher nozzles mainly have three structures: slope nozzles, direct current atomizing nozzles, and water-based fire extinguishing nozzles. 1. Slope nozzle, which is small hole slope diffusion, only satisfies the rapid suspension and diffusion of dry powder in the air, and quickly forms a dry powder fire extinguishing concentration in the fire extinguishing area, but it is only suitable for dry powder fire extinguishers, for water-based foam, perfluorohexanone and As far as clean gas fire extinguishers are concerned, they cannot meet the conditions of use. 2. The direct current atomizing nozzle, its internal structure is a straight-through design, so it needs a higher pressure to atomize the fire extinguishing agent. ...

AI Technical Summary

Problems solved by technology

1. Slope nozzle, which is small hole slope diffusion, only satisfies the rapid suspension and diffusion of dry powder in the air, and quickly forms a dry powder fire extinguishing concentration in the fire extinguishing area, but it is only suitable for dry powder fire extinguishers, for water-based foam, perfluorohexanone and As far as clean gas fire extinguishers are concerned, they cannot meet the conditions of use

2. The direct current atomizing nozzle, its internal structure is a straight-through design, so it needs a higher pressure to atomize the fire extinguishing agent. Compared with the atomizing nozzle, the atomization effect of the direct current nozzle is not as good as that of the rotary atomizing nozzle at low pressure. The effect is good; the direct current atomizing nozzle uses small hole atomization, which requires a certain ratio of pressure and small holes to achieve atomization. The atomization condition itself has a relatively high saturated vapor pressure, such as the boiling point of hexafluoropropane -4°C; if It is just a small hole, spraying at low pressure will not meet the atomization requirements, it will form a straight column of water flow, and the boiling point of perfluorohexanone is 49°C, so it cannot meet the requirements of atomization.

3. The water-based fire extinguisher nozzle uses high-pressure driving gas to spray the fire extinguishing agent through the rotary atomizing nozzle, so that the liquid film of the fire extinguishing agent is broken and atomized by the air. The atomizing nozzle used only emphasizes atomization and diffusion, because the water-based The working principle of the fire extinguisher is to form a layer of dense foam on the surface of the fire, and use the foam covering method to isolate oxygen to extinguish the fire; therefore, the water-based fire extinguishing nozzle cannot meet the requirements of maintaining the fire extinguishing concentration of the agent within a certain period of time and within a certain space, so in Perfluorohexanone fire extinguishers can not be used

For fire extinguishers whose agent is liquid at room temperature, such as perfluorohexanone fire extinguishers and 2-bromotrifluoropropene fire extinguishers, 60% of fire extinguishers are broken when extinguishing fires, and 40% of them rely on heat absorption to achieve fire extinguishing effects. Using the above three types of nozzles, The fire extinguishing effect is not ideal

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