Self-educing foam nozzle

Details Self-educing foam nozzle Self-educing foam nozzle

A - Human Necessities

62

C

A62C 5/02 (2006.01) A62C 31/12 (2006.01) B05B 1/26 (2006.01) B05B 1/28 (2006.01) B05B 7/00 (2006.01) B05B 7/06 (2006.01)

Patent

CA 2339128

A firefighting nozzle (10) has a low-turbulence liquid flow channel (20) that is directed outwardly by a baffle (30). Surrounding the flow channel (20) is an annular concentrate chamber (62). The concentrate chamber (62) leads from a concentrate inlet (14) to a concentrate entry port (50) on a rearward wall (52) opposed to the baffle (30). Liquid flowing past the baffle (30) draws concentrate through the concentrate entry port (50) into the flow. The concentrate and liquid subsequently mix to produce firefighting foam.

Cette lance d'incendie (10) comporte un conduit d'écoulement liquide faible turbulence (20), cet écoulement étant dirigé vers l'extérieur par un déflecteur (30). Une enceinte annulaire pour produit concentré (62), qui entoure le conduit d'écoulement (20), part de l'orifice d'amenée de ce concentré (14) pour aboutir à un orifice d'entrée de ce concentré (50) situé sur une paroi postérieure (52) à l'opposé du déflecteur (30). Le liquide s'écoulant au-delà du déflecteur (30) attire le concentré qui passe par l'orifice d'entrée (50) et pénètre dans le flux d'écoulement. Le concentré et le liquide, qui se mélangent ensuite, constituent la mousse extinctrice.

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