Fire extinguishers – Processes – Of extinguishing fire
Patent
1996-03-29
1998-08-25
Pike, Andrew C.
Fire extinguishers
Processes
Of extinguishing fire
169 9, 169 16, 169 62, A62C 310
Patent
active
057974578
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method for fighting fire, especially for fire-fighting in engine rooms of ships and spaces comparable with them.
FIG. 1 in the Finnish Patent Application 933997 shows a number of nozzles, sprinklers or spray heads in a bilge space of an engine room. The spray heads in question are directed downwards.
The object of the invention is to improve this arrangement and to provide an effective fire-fighting especially in narrow and possibly winding spaces, such as bilge spaces, channels, and cupboard constructions of different kinds, etc.
The purpose of the invention is to direct the spray heads in said spaces one after the other, say in a series, so that a spray head behind sprays towards the next spray head in front.
In engine rooms of ships, the spray heads are preferably positioned in a circle around the engine.
By directing the spray heads one after the other, fog streams from the individual spray heads will strengthen each other and simultaneously secure a necessary availability of air behind and close to each spray head, so that it is possible, according to what is wished, to achieve strong fog streams having a high capacity to penetrate and carry off. For this purpose, the spray heads may preferably be constructed according to what is set forth in the International Patent Application PCT/FI92/00155 (publication WO92/20453), which is incorporated by reference.
In the following, the invention will be described in greater detail with reference to an embodiment shown in the attached FIGURE.
In the FIGURE, an engine room is indicated by reference numeral 1, the engine room floor is indicated by 2, a bilge space below the floor is indicated by 3, and the engine in question, e.g., a diesel engine, is indicated by 4. Up to the ceiling of the engine room are positioned a number of sprinklers or spray heads 5 and on the floor level are arranged a number of spray heads and/or sprinklers 6 directed upwards and a number of nozzle heads 7 directed around the bilge space 3.
A drive unit for delivering extinguishing liquid and/or extinguishing gas is indicated by 8. An outgoing liquid line 9 of the drive unit 8 can be connected selectively to different fire zones; the engine room 1 constitutes a fire zone comprising a feederline 10 to the spray heads 5 at the ceiling of the engine room and a branching 11 to the spray heads 6, 7 at the engine room floor 2.
The drive unit 8 comprises two pressure gas containers 12 and 13 having an initial charging pressure of e.g., 200 bar and automatically or manually controllable outlet valves for leading pressure gas into and driving extinguishing liquid out of two liquid containers 14 through the line 9. The pressure gas containers 12 can be constituted by so-called standard gas bottles. The extinguishing liquid from the containers 14 is arranged to flow into the line 9 via a valve 15, the opening of which effected by the liquid pressure is, however, counteracted by a liquid cylinder 16 arranged in connection with the pressure of the propellent gas, in combination with a throttle 17, as will be described in more detail below.
A common outlet line 18 of the propellent gas containers 12 and 13 is connected via a pressure reducing valve 21 adjustable for 10 bar, besides to the liquid containers 14, also to a low-pressure water pump 19, 20, whereby 19 indicates a pneumatic driving motor for the actual water pump 20 having an operating pressure of e.g., about 16 bar. Alternatively, it is possible to use a low-pressure pump of another kind, e.g., a double-acting piston pump. The pump 20 sucks water from a fresh-water container via a line 22 or, e.g., sea or lake water, alternatively. The water is filtered by means of filters 23 and 24 to a particle level of 10 .mu., for instance. Occurring variations in pressure may be balanced by means of an accumulator not shown in FIGURE.
The FIGURE shows the equipment ready for being used. The pressure bottles 12 and 13 are filled with propellent gas, having a pressure of, e.g., 200 bar, and the liquid bottles 14 are fil
REFERENCES:
patent: 2295571 (1942-09-01), Ensminger et al.
patent: 5125458 (1992-06-01), Berman
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