Aqueous film-forming foam fire extinguishing device

Abstract

The invention discloses an aqueous film-forming foam fire extinguishing device. The aqueous film-forming foam fire extinguishing device comprises a liquid storage tank, a second mixing box, a second high-pressure pump, a water box and a first mixing box. A base is tightly welded to the lower portion of the liquid storage tank, a liquid drain pipe is arranged at the upper end of the liquid storagetank, a liquid drain valve is arranged on the outer surface of the liquid drain pipe, and a support is arranged at the lower end of the liquid drain valve. According to the aqueous film-forming foam fire extinguishing device, a swirling device is installed in a fire-fighting lance, the swirling device is composed of a central conical hole and a plurality of inclined holes evenly distributed in theperiphery, an included angle is formed between each inclined hole and the axis of the swirling device, the inflow end face and the outflow end face of the swirling device are provided with forty five-degree chamfers, and the effect of reducing hydraulic friction can be achieved. Aqueous film-forming foam mixed liquid enters the swirling device to form a swirling current and a straight current, the swirling current is sufficiently swirled and atomized through a gradually contracted long cone type current mixing cavity, kinetic energy is increased step by step, the swirling current is jetted out from a nozzle through liquid jetting holes, and thus water atomization and mixed foaming are achieved, and the effect of conducting long-distance jetting according to a preset angle can be effectively achieved.

Description

technical field [0001] The invention relates to the related technical field of aqueous film-forming foam fire extinguishing, in particular to an aqueous film-forming foam fire extinguishing device. Background technique [0002] The aqueous film-forming foam fire extinguishing device is a kind of fire extinguishing device that uses the aqueous film-forming foam fire extinguishing agent as the fire extinguishing agent. Form a layer of water film on the oil surface, inhibit the evaporation of oil, isolate it from the air, and make the foam quickly spread to the area that has not been directly sprayed, which can quickly control the spread of fire, and can also be used in combination with dry powder fire extinguishing agent . [0003] However, the existing AFFF fire extinguishing device stores a limited amount of AFFF fire extinguishing agent, which makes it less sustainable and not suitable for use in large-scale fires. At the same time, when the foam liquid flows through the p...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an aqueous film-forming foam fire extinguishing device to solve the problems of poor sustainability and the inability to achieve the effect of small-flow remote injection in the above-mentioned background technology

Images