Fire extinguishers – Sprinkler heads
Patent
1996-11-06
1998-06-09
Hoge, Gary C.
Fire extinguishers
Sprinkler heads
A62C 3568
Patent
active
057621446
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns a sprinkler such as is used for extinguishing fires in buildings, such as hotels or industrial plants.
Such sprinkler nozzles consist essentially of a liquid canal, e.g. with a pressurized water connection, a base cone with a determinate distance to the outlet of the canal and, arranged there-under, a distributor star with radial slits. The base cone and the head containing the canal are connected with one another via a bridge. The distributor star is a separate part and screwed to the base.
Such a sprinkler nozzle is known from German Utility Model G 92 15 957 in which the liquid canal tapers in the direction of flow and the generatrices of the canal converge in a support cone which carries the bent-formed distributor star on the base.
Furthermore, DE 3225 798 Al discloses a quenching sprinkler in which, after the ejection of a closure element in the form of a small glass drum, the quenching liquid is guided against a spray plate which is bent against the direction of flow and which carries a head receiver in the form of a bore in the middle of the plane of the indentations of the spray plate.
A disadvantage of the conventional sprinklers is that thee produce foam unsatisfactorily with only a small circle of sprinkling, for which reason special constructions are have been mostly used; that the radiating out from the distributor star takes place not radially but rather at a relatively great angle to the plane of the star; and that, in the case of liquids, relatively small projection distances are achieved. Furthermore, these nozzles are made up of several parts.
SUMMARY OF THE INVENTION
An abject of the present invention is to provide a sprinkler nozzle of the initially described kind which car be cast in one piece (brass) with the help of which foams can be produced with large coverages. It is another object of the invention to provide, considerably increased projection distances, can be achieved, the radiating, out of the foam produced or of the (quenching) liquids takes place essentially vertically to the middle axis of the nozzle.
The present invention comprises a sprinkler nozzle for the spraying of foam and/or water, especially for extinguishing purposes, which consists of a head part and a canal tapering in the direction of the supplied medium with Inlet and outlet, as well as bridge connected to this with supports spaced apart converging at the bottom between arranged a support cone which rests on a distributor star and whereby the distance between the outlet of the canal and the scattering pot is about the same as the distance between outlet and inlet of the head and whereby the generatrices of the conical tapering of the canal in the carrier cone converge. According to the invention, the support cone has a scattering pot which consists of a cylindrical bore and an inner cone as base, whereby the generatrices of the canal converge in the scattering pot and the surface of the distributor star encloses an angle .alpha. of 0.degree. to 5.degree., preferably 3.degree., with the vertical plane to the middle axis of the nozzles.
With the nozzle according to the invention, it is possible to produce foam and water from such a nozzle so that, in the case of installation, the nozzle can be connected via two connections with two sources, whereby naturally, besides alternating supplying, it possible to mix foam-producing agents into the quenching waters.
Furthermore, with the present nozzle it is possible for the first time first to produce a quenching foam and, for example, after addition of the foam is complete the coverages of the foams produced do not differ fundamentally from those of the waters.
With a nozzle of the present invention, measured in a vertical distance from the lower edge of the distributor star of one meters, spray circles of up to 8.5 meters are achieved in comparison with conventional 5 to 6 meters. In each case, in the case of the measurement, a water pressure of 5 bar was applied to the nozzle and was produced via a 6 inch
REFERENCES:
patent: 2085987 (1937-07-01), Loepsinger
patent: 2528063 (1950-10-01), Loepsinger
patent: 2768696 (1956-10-01), Sherburne
patent: 3561537 (1971-02-01), Dix et al.
patent: 3918645 (1975-11-01), Mohler
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