Fire detection tube type powder aerosol self-extinguishing device

Abstract

The invention discloses a fire detection tube type powder aerosol self-extinguishing device. A composite pressure tank consists of an outer barrel in which high-pressure driving gas is stored and an inverted conical inner barrel which is positioned in the outer barrel and is used for storing a powdery fire extinguishing agent and the driving gas; a constant pressure self-locking one-way valve through which the high-pressure driving gas in the outer barrel enters the inner barrel is arranged on a barrel body of the inner barrel which corresponds to the outer barrel; a bottle head valve is arranged on the top of the inner barrel; the bottom end of a siphon pipe connected to the bottle head valve stretches into the bottom of the inner barrel; a ball valve and a polymer hose which is connected to an outlet of the ball valve and is used for filling the driving gas are arranged on the top of the bottle head valve; an inflating one-way valve and a pressure alarm switch are arranged at the tail end of the polymer hose; an electric signal output by the pressure alarm switch is connected to an alarm display. According to the fire detection tube type powder aerosol self-extinguishing device disclosed by the invention, reliable fire extinguishing pressure in the inner barrel can be kept by the outer barrel through the constant pressure self-locking one-way valve, and the driving gas in the outer barrel and the fire extinguishing agent and the driving gas in the inner barrel are totally released together during a fire.

Description

technical field [0001] The invention belongs to fire-fighting and fire-extinguishing equipment, in particular to a fire-detecting tube powder aerosol automatic fire-extinguishing device. Background technique [0002] In recent years, with the increasing number of various power facilities and electrical equipment, electrical fire accidents caused by electrical equipment and electrical line failures have become more and more serious. Every year around the world, electrical fires cause a lot of economic and property losses. Therefore, power facilities The fire protection of electrical equipment, etc. is particularly important, especially the fire protection of 24-hour live equipment and facilities such as power distribution cabinets, communication machine rooms, elevator rooms, charging / substations, electrical equipment rooms, and instrument consoles. . [0003] Existing fixed automatic fire extinguishing systems are usually used for fire protection of the entire protection ar...

AI Technical Summary

Problems solved by technology

However, due to technical reasons, the fire extinguishing agents currently available for this technology are mainly heptafluoropropane and carbon dioxide. Among them, heptafluoropropane has low fire extinguishing efficiency, and the fire extinguishing design concentration requirement for full flooding is 0.7kg / m 3

The local fire extinguishing effect of heptafluoropropane fire extinguishing agent is limited, and it is not suitable for semi-enclosed or open spaces, and a large amount of toxic hydrogen fluoride gas will be produced during the fire extinguishing process, which is easy to cause secondary damage to the protected object. Heptafluoropropane itself is also a powerful greenhouse gas ( GWP is 2900)

[0006] Carbon dioxide only has a physical fire extinguishing effect, and its fire extinguishing efficiency is lower. For example, the fire extinguishing design concentration needs to be 1.5kg / m when fully flooded. 3

[0007] Although the container valve used in the existing fire detection tube direct automatic fire extinguishing device can solve the problems of chronic gas leakage and pressure drop, the design of the valve is complicated, the cost is high, and it is only suitable for gas fire extinguishing agent

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