Gas-driven method for fighting fire
OwnerGoran Sundholminventor
Life of this patent
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Abstract
A method of fighting a fire drives a first fire-extinguishing liquid from at least one spray head or sprinkler at a fire with a low-pressure pump. Thereafter it drives a second fire-extinguishing liquid from a liquid container and the spray head or sprinkler at the fire with a first propellant gas from at least one gas container, at least some of the first propellent gas remaining in the gas container after all of the second fire-extinguishing liquid has been driven from the liquid container. Still thereafter it again drives the first fire-extinguishing liquid from the spray head or sprinkler at the fire with the low-pressure pump, the low-pressure pump being driven by the first propellant gas that was remaining in the gas container.
Claims10
A method for fighting fire, the method comprising:
- delivering extinguishing liquid to at least one spray head or sprinkler (5-7) by a drive unit (8) comprising at least one hydraulic accumulator (12-14) comprising at least one pressure gas container (12, 13) containing a propellent gas chargeable up to a high initial pressure and a liquid container (14) containing the extinguishing liquid, and a low-pressure water pump (19, 20), wherein a remaining portion of the propellent gas is left over after the hydraulic accumulator has been emptied of the extinguishing liquid;
- driving the low-pressure pump utilizing at least part of the remaining portion of the propellent gas;
- initially delaying said delivering when the drive unit is switched on;
- during said delaying initially driving the low-pressure pump utilizing gas;
- and
- delivering cooling liquid to a pipe system (10) and to said spray head or sprinkler by said initially driving;
- wherein said driving utilizing said part of the remaining portion of the propellent gas comprises redriving the low-pressure pump.
A method according to claimed, further comprising upon said opening, allowing the cylinder liquid pressure to sink to a predeterminable value, for adjusting a pressure at which the valve in the outlet line is closed again.
A method of fighting a fire, the method comprising:
- first driving a first fire-extinguishing liquid from at least one spray head or sprinkler (5, 6, 7) at a fire with a low-pressure pump (19, 20);
- thereafter driving a second fire-extinguishing liquid from a liquid container (14) and the spray head or sprinkler at the fire with a first propellant gas from at least one gas container (12, 13), at least some of the first propellent gas remaining in the gas container after all of the second fire-extinguishing liquid has been driven from the liquid container;
- still thereafter again driving the first fire-extinguishing liquid from the spray head or sprinkler at the fire with the low-pressure pump, the low-pressure pump being driven by the first propellant gas that was remaining in the gas container.
Dependencies are inferred from the claim text.