Fire extinguishers – Mount – cabinet or guard – Movable relative to fire
Patent
1995-07-21
1998-10-27
Hoge, Gary C.
Fire extinguishers
Mount, cabinet or guard
Movable relative to fire
169 9, 169 13, 169 16, A62C 2700
Patent
active
058266631
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a system for fighting fires, especially for hotels, office buildings, industrial plants or even communities.
Conventional sprinkler installations require large amounts of water, which especially in southern, dry countries has presented difficulties with the water supply. One has had to build large reservoirs of water and pump stations in order to secure the operation of the sprinkler installations. The installations ar usually electrically operated, but because one cannot rely on supply of electric power, especially in the case of serious fires, one has had to keep e.g. diesel driven pumps in addition to the electrically driven pumps, or diesel driven generators.
Such known installations for fighting fires are very expensive.
The object of the invention is to provide a new system for fighting fires, which is reliable and simple and thus cheap.
The system according to the invention is mainly characterized in that the unit which is to be protected is provided with at least one such an automatic fire fighting installation, known per se, that is arranged to at a high pressure (usually about 100-300 bar) spray a fog-like extinguishing liquid, with small droplets, and which is arranged to be operated by means of accumulated energy, preferably hydaulic accumulators, for initial fighting of a fire broken out, and that the final fighting of the fire is arranged to be done with the help of a fire truck provided with a water tank and a high pressure pump.
The hydraulic accumulators of the fire fighting installation are preferably dimensioned such that liquid fog can be sprayed until the fire truck gets to place, which can be expected to take some ten minutes.
By somewhat "normal" fires said fire fighting installation with hydraulic accumulators is capable of extinguishing the fire or at least suppressing it until the fire truck has arrived, whereat the final extinguishing in many cases can be carried out by means of portable hand extinguishers.
In case of a serious fire or a so-called smouldering fire this, however, is not always so, whereat the final fighting of the fire is arranged to be carried out by connecting the water tank of the fire truck via the high pressure pump to said fire fighting installation.
The system according to the invention requires no large water reservoires and is neither dependent on electric power. If the unit to be protected is large one can of course keep two or more fire trucks.
The invention also relates to a new fire truck.
In known fire trucks, the power of the water pump is taken from a power takeout connected to the drive engine of the truck. The power available to the water pump is hereby only a relatively small portion (about 10%) of the total power of the drive engine. With respect to a use here contemplated, known fire trucks are, in addition, unnecessary large, whereby they are expensive and cannot pass through narrow passages.
The fire truck according to the invention has a water tank and a high pressure pump. The drive shaft of the pump is arranged to by means of a quick-coupling, which is known as such, be connected to the cardan shaft of the fire truck. Thanks to this, the water pump can utilize the whole power of the truck engine. The truck engine, and thus the whole fire truck, can be made considerably smaller than before.
In a preferable embodiment, the fire truck is also provided with at least one hydraulic accumulator which is connectable to the fire fighting installation for the time it takes to connect the cardan shaft of the truck to the main pump.
To the power takeout of the truck engine, which usually gives about 10% of the maximum power of the engine, can preferably be connected a smaller pump to keep the hydraulic accumukators charged and to, when driving to the fire site, secure that the hydraulic accumulators will be fully charged. By cold weather the charging pump provides the additional advantage that it after full charge of the accumulators can be connected to circulate the water in the tank, via sequence valves (over-flow v
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patent: 4162714 (1979-07-01), Correll
patent: 4345654 (1982-08-01), Carr
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