Bulk-flow built-in non-premixed compressed air foam extinguishing apparatus

Abstract

The invention discloses a bulk-flow built-in non-premixed compressed air foam extinguishing apparatus. The apparatus comprises a foam mixed liquid container, a foam liquid storage tank and a gas-liquid mixing device; the upper portion of the foam mixed liquid container is provided with a container liquid discharge pipeline and a container gas feeding hole; the gas-liquid mixing device is positioned in the foam mixed liquid container; the gas-liquid mixing device comprises a mixing pipeline and a uniform mixing part, the upper end of the mixing pipeline is connected with the container liquid discharge pipeline, and the lower end of the mixing pipeline extends to the bottom of the foam mixed liquid container; the wall of the mixing pipeline is provided with a plurality of mixing device gas feeding holes; the uniform mixing part is arranged in the mixing pipeline; and the foam liquid storage tank is connected with the foam mixed liquid container through a main conveyer pipeline. When the foam extinguishing apparatus works, a high pressure gas with a certain pressure is injected into the foam mixed liquid container containing a foam mixed liquid through the container gas feeding hole, and enters the gas-liquid mixing device from the mixing device gas feeding holes in order to realize bulk flow gas supply and guarantee gas-liquid phase pressure balance.

Description

technical field [0001] The invention relates to a large-flow built-in non-premixed compressed air foam fire extinguishing device, which is especially suitable for extinguishing large-scale fires such as storage tank fires and fire embankment fires, and can also be used in places such as warehouses, tunnels, and airports. Background technique [0002] At present, the compressed air foam fire extinguishing devices at home and abroad all adopt the external type, that is, the gas-liquid mixing device is located outside the foam mixture container, the gas source and the foam liquid are placed separately, the gas is supplied separately by compressors, high-pressure gas cylinders, etc., and the foam liquid is supplied by The pump transports, and the gas and foam liquid are mixed in the gas-liquid mixing device. This kind of structural design is limited by the capacity of compressors, high-pressure gas cylinders and other containers, and the gas supply is small, resulting in a low m...

AI Technical Summary

Problems solved by technology

This kind of structural design is limited by the capacity of compressors, high-pressure gas cylinders and other containers, and the gas supply is small, resulting in a low mixing concentration of gas and foam liquid, which limits the supply strength of compressed air foam, and ultimately leads to the failure of compressed air foam fire extinguishing devices. Large flow rate injection; In addition, this structural design is also difficult to control the same gas-liquid phase delivery pressure, so that the gas-liquid phase mixing ratio cannot be kept constant

[0003] Based on the above reasons, this type of fire extinguishing device is currently only used in fire trucks and small fire fighting equipment, but cannot be used in the fighting of major fires.

In addition, the pre-mixed foam mixture has a short storage time and requires a lot of replacement work

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