Fire extinguishers – Mount – cabinet or guard – Movable relative to fire
Patent
1995-11-03
1997-05-27
Pike, Andrew C.
Fire extinguishers
Mount, cabinet or guard
Movable relative to fire
169 53, B64D 116
Patent
active
056323409
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method and equipment for fighting fires, in particular outdoor fires difficult to extinguish, such as forest fires and oil fires.
Forest fires, oil fires, and many other types of fires are often either too inaccessible or too hot for early fighting of the fire.
The object of the invention is to provide a new method and new equipment to more efficiently than hereto fight such difficultly extinguishable fires.
The method of the invention is mainly characterized in that, by means of a preferably mobile construction, a set of hydraulic accumulators provided with outlet nozzles capable of, utilizing a high drive pressure, producing, by suction effect, a fog-like penetrating liquid spray, is brought to action range from a fire and thereafter the hydraulic accumulators are emptied into the fire.
According to a preferable mode of the method, the set of hydraulic accumulators is lowered from a helicopter to action range, the air stream generated by the main rotor of the helicopter preferably being utilized for intensifying the penetration power and the effect of the extinguishing liquid.
The equipment according to the invention is mainly characterized in that it comprises a set of hydraulic accumulators movable by means of a suspension structure to action range from a fire and provided with outlet nozzles capable of, utilizing a high drive pressure, producing, by suction effect, a fog-like penetrating liquid spray.
The set of hydraulic accumulators is preferably held together by an enveloping jacket structure preferably provided with jacket openings and/or a collecting air intake at the closed end of the hydraulic accumulators opposite to the nozzle heads.
By means of the invention e.g. distant forest fires can be quickly and efficiently fought, which has not been possible hereto.
The invention shall in the following be described in more detail with reference to a preferred exemplifying embodiment of the equipment according to the invention, shown in the attached drawing.
FIG. 1 shows the equipment according to the invention, directed downwards.
FIG. 2 shows the equipment directed to the side.
FIG. 3 shows a partial longitudinal section of the equipment of FIG. 1.
FIG. 4 shows the equipment of FIG. 1 seen from above.
The equipment shown in the drawing comprises a set or a battery of hydraulic accumulators 1, in the example according to the drawing seven accumulators, which are held together by an enveloping jacket structure 2 which in the drawing is made of two parts joined together by means of a flange joint 3. The accumulators 1 can have an initial charge pressure of up to about 280 bar, although lower pressures also are possible, and can for the rest either be of conventional structure with a so-called gas bladder or membrane, or possibly be made in principle as has been presented in finnish patent application 931405, so that they at first deliver liquid only and in a later stage, when the drive pressure of the accumulators has fallen, a mixture of liquid and drive gas.
The equipment is intended to by means of stays 4 and a lift loop 5 be able to be lifted and lowered as needed from, e.g., a helicopter or a crane.
The upper part of the jacket structure 2 in FIG. 1 has a funnel-like part 6 widening upwards, preferably more or less conically, and the lower part of the jacket structure preferably has a number of jacket openings 7 near the outlet nozzle heads of the hydraulic accumulators 1, and a funnel-like part 8.
The outlet nozzle heads of the hydraulic accumulators 1, which also can be called spray heads, are visible in FIG. 3 and are designated 9. The spray heads 9 are preferably made as presented in the international patent application PCT/FI92/0155 (Publication No. W092/20453), with a number of obliquely downwards and outwards directed nozzles adapted mutually with respect to, among other things, droplet size and accumulator drive pressure, that they, producing a suction, deliver fog-like, proportionally concentrated liquid sprays, which effectively are capable of penetrati
REFERENCES:
patent: 2250762 (1941-07-01), Haberlin
patent: 3220482 (1965-11-01), Eveleth
patent: 3710868 (1973-01-01), Chadwick
patent: 4285403 (1981-08-01), Poland
patent: 4601345 (1986-07-01), Mahrt
patent: 4881601 (1989-11-01), Smith
patent: 5161621 (1992-11-01), Shlomo
patent: 5385208 (1995-01-01), Baker et al.
Derwent's Abstract, No. 81-J4581D/37, Week 8137, Abstract of SU, 1225585 (Feuer Wschgera Neuruppin (KWIA)), 23 Apr. 1986.
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