Abrégé

An air foam firefighting system, consisting of a jetting system, a water supply system, an air supply system and a foam supply system. The jetting system is in communication with the water supply system, the air supply system and the foam supply system. The water supply system and the air supply system are self-powered supply systems, and the foam supply system is powered by the water supply system to supply a foam mixture via a Venturi negative pressure supply device. The jetting system is a cylindrical hollow structure independently arranged on a backpack-type or small vehicle mobile structural body, and comprises a firefighting spray pipe, a water, foam and air mixing device, and various medium inlets. The air foam firefighting system uses wind power as a jetting force of the firefighting system, may be used as an air firefighting device for forest firefighting, and may also be used for many other types of firefighting situations. The jetting system fully mixes a firefighting agent with water, further foaming and jetting is driven by the force wind, and the jetting distance is significantly extended. In conditions of relatively difficult fire scene traffic, the present invention fully achieves the goal of a light, portable, short-distance system which implements large-force firefighting.

Classes IPC  ?

• A62C 5/02 - Fabrication de substances extinctrices immédiatement avant l'emploi de mousse
• A62C 31/12 - Buses spécialement conçues pour la lutte contre l'incendie pour délivrer de la mousse ou de la mousse pulvérisée

Abrégé

An air foam firefighting gun, made up of structures such as: an air foam mixture nozzle (11) arranged at a front end; an air inlet (12) arranged on the same axis as the mixture nozzle (11) and at a rear end; a firefighting agent mixture inlet (7) and a firefighting agent mixture outlet (8) arranged at the centre of the axis of the air inlet (12); water jet inclined openings (10) arranged at the junction between the mixture nozzle (11) and the air inlet (12) in an evenly spaced and surrounding manner and in communication with an annular liquid cavity (9); a water inlet (4). The air foam firefighting gun uses wind power as a firefighting jetting force, may be applied as an air firefighting device to situations such as forest firefighting, and may be applied to many types of firefighting situations. The structure of the jetting system is optimised, the firefighting agent is driven to foam and jet by the force wind, and the jetting distance is large. The air foam firefighting gun uses surrounding tilted liquid outlets, generates a greater negative pressure, sucks in more air, and generates a higher foaming factor. The fluid flows without resistance, the device is recoilless, the jetting distance is further, the foam proportion may be adjusted or even turned off, and the device has a wider range of applications.

Classes IPC  ?

• A62C 17/00 - Extincteurs à main essentiellement en forme de pistolets ou de fusils