PL158935B1 - Fire-hose nozzle with elliptical outflow of extinguishing medium - Google Patents

Abstract

Fire nozzle with elliptical outflow of the extinguishing medium, containing a hollow frame with a handle, and a trigger lever with a sprung mandrel terminated with a sealing head and cooperating with the outlet, characterized in that the ending of the nozzle is in the form of an outlet in the form of a long slit or having at least two divergently positioned holes, where all of the holes are arranged in one plane.<IMAGE>

Description

Patent Office of the Republic of Poland @ Application number: 279258 (22) Date of application: May ^{4, 1989 @ IntCl 5}

A62C 31/02

READING 0 G 6 LBA

Fire nozzle with an elliptical outflow of the extinguishing agent

Application announced:

12/11/1990 BUP 23/90 Rawn © U ^{p and Y} of a ^p atentu:

Scientific and Research Center for Fire Protection, Józefów near Oiwock, PL

45) The grant of the patent was announced:

Inventors:

Tadeusz Derecki, Otwock, PL Stefan Wilczkowski, Warsaw, PL

30.10.1992 WUP 10/92 (57) Fire nozzle with an elliptical outflow of the extinguishing agent, including a hollow body with a handle and a trigger lever with a sprung stem, ended with a sealing plug and cooperating with the outlet nozzle, characterized in that the nozzle ends in an elongated form slots or having at least two divergent openings, all openings being arranged in one plane.

PL 158 935 Β1

Fig. 1

FIRE FIGHTING GENERATOR WITH ELLIPTICAL EXTINGUISHING AGENT OUTLET

Claims (2)

Patent claim Fire-fighting nozzle with an elliptical outflow of the extinguishing agent, including a hollow body with a handle and a trigger lever with a spring-loaded pin, ended with a mushroom, sealing and cooperating with the outlet nozzle, characterized in that the end of the nozzle is an elongated slot nozzle or with at least two divergent holes all openings are arranged in one plane. ł «« The subject of the present invention is a fire nozzle, the nozzle of which is designed such that the extinguishing agent flows out of the cross section in an elliptical shape. Known fire nozzles are equipped with discharge nozzles having a circular cross-section, from which the extinguishing agent flows out into a frusto-conical shape. There are also known solutions for the nozzles of fire nozzles with a circular cross-section, for example from patent specifications Nos. 100 606, 106 732, 122 775, 122 410, 122 969, 123 276, 123 332, 41 607, 40 172, 45 036. Moreover, there are known solutions consisting in additional installation of expensive deflectors at the outlets of foam nozzles, causing the flattening of the outgoing foam stream. The disadvantage of these devices is the necessity to add special control rods and appropriately profiled diaphragms causing additional resistance of the outflowing stream of the extinguishing agent reducing the length of the stream throw. The present invention solves the problem of such a design of the discharge nozzle of a fire nozzle that is adapted to deliver any extinguishing agent, the outgoing stream having an elliptical cross-section along its entire length. Such a shape increases the extinguishing efficiency of the supplied extinguishing agent by about two times with a comparable intensity of its outflow. Such a construction does not require additional installation of deflectors flattening the outgoing stream of the extinguishing agent. The invention is explained in detail on the basis of an exemplary embodiment of a fire nozzle with an elliptical discharge nozzle illustrated in the drawing, in which Fig. 1 shows a longitudinal sectional drawing illustrating how the nozzle of an elliptical nozzle is inserted, Fig. 2 shows the geometry of a nozzle with a slotted opening, Fig. 3 shows the nozzle geometry with divergent holes. As shown in Fig. 1, the subject slotted nozzle 2 is the end of a pistol nozzle 1 attached to the body with a nut 8. The extinguishing agent flows out through the nozzle slot 2 after pressing the lever 3 mounted on the joint 10 and moving the dam pin 4 fixed in the sleeve 5 sealed with a rubber ring 9 The outflow of the extinguishing agent is interrupted by releasing the pressure of the lever 3 and thanks to the return spring 7 of the valve stem 4 towards the nozzle. 2. Regulation of the opening degree is made with the self-locking nut 6. The extinguishing medium penetrates through the hollow body 1 of the nozzle into the initial chamber of the nozzle and then through the elongated ellipse-shaped slot outside the nozzle. It is preferable that the flexible end of the nozzle pin 4 of the nozzle rests evenly against the sealing seat of the nozzle.