| 摘要 |
PROBLEM TO BE SOLVED: To prevent reduction in foaming ratio in a high expansion foam fire-extinguishing system used in a pit of an oil tank, a culvert of a petrochemical complex, a cabin, a hold, or the like. SOLUTION: A high expansion foam fire-extinguishing system B includes: a foam generator body 1 formed to a tubular shape; a foam forming screen 2 arranged at a distal end 1a side of the foam generator body 1; an emission nozzle 3 arranged at a back end 1b side of an interior of the foam generator body, for radiating a foam solution W in an emission pattern WP that spreads in a conical shape towards the foam forming screen 2; and an intermediate screen 4 arranged between the foam forming screen 2 and the jet nozzle 3, in which the intermediate screen 4 is arranged in a liquid droplet speed regulating region from a landing position P0 at which an outer periphery of the jetting pattern WP hits an inner wall 1f of the foam generator body 1 to a limit position P1 at which liquid droplets can pass through a mesh of the intermediate screen 4. COPYRIGHT: (C)2009,JPO&INPIT
|
