RU2658581C1 - Mouthpiece for a fire-hose barrel - Google Patents

Abstract

FIELD: fire safety.

SUBSTANCE: mouthpiece for a fire-hose barrel comprises body 1, in the hole of which there is adjustable nozzle 2. Nozzle is made in the form of a tape wound into a spiral ring. Control coupling 3 is installed on the body with the possibility of translational motion S and rotation. One of the inner turns of the spiral is connected to the control coupling by means of plug 4. Coupling has handle 6 for position control and clamp 7. Spiral nozzle can have turns with a gap in relation to each other and a non-circular, for example oval shape.

EFFECT: nozzle allows quickly adjusting the stream pattern and consumption of fire extinguishing liquid.

3 cl, 5 dwg

Description

The invention relates to the field of fire fighting equipment, and more particularly to devices for the formation and supply of a jet of extinguishing fluid.

Known nozzles for a fire barrel containing an elastic confuser nozzle covering its conical collet and a nut compressing the collet [1]. When rotating the nozzle nut, it smoothly adjusts the diameter of the nozzle hole and the range of the jet. At the same time, the nozzles do not allow to obtain the atomized fluid flow necessary for the spillage of a large area of non-quenched combustion sites.

Known fire barrel containing a cylindrical body on which is mounted with the possibility of rotation of the nozzles, equipped with a conical nozzle with longitudinal cutouts [2]. The device allows you to form a stream of extinguishing fluid in a wide range of its density: from compact to finely dispersed. The disadvantages of the device are the design complexity, large pressure losses in the multi-channel passages of the nozzle, the tendency to clogging.

Known adjustable nozzles for supplying a fluid having a housing with an elastic working section and a casing with a non-circular hole that deforms the working section [3]. This nozzle allows you to get a swirling stream of adjustable range.

For the prototype adopted nozzles for the fire barrel [1].

The technical result of this invention is the simplicity and reliability of the device, in a wide range of formation of a jet of extinguishing liquid: from a dense jet of adjustable range to a sprayed frontal jet of short-range action. This allows you to effectively extinguish the fire at a long distance and eliminate the foci of combustion on the near front.

The specified technical result is achieved in that the adjustable nozzle is made in the form of a tape rolled up into a spiral ring, the outer turn of which is fixed in the body of the fire barrel, and one of the inner turns is connected to the plug of the control sleeve mounted on the barrel body with the possibility of translational movement and rotation.

The invention is illustrated by drawings, in which FIG. 1 shows the nozzles in the folded position and the view along arrow A; FIG. 2 - working nozzles in the extended position; FIG. 3 - nozzles of oval section, end view; FIG. 4 - nozzles with inter-turn clearance and view along arrow A, the coupling is conventionally not shown; FIG. 5 - working nozzles in FIG. four.

The device consists of a barrel body 1, in the hole of which a nozzle 2 is located, made in the form of a tape rolled up into a spiral ring, the outer turn of which is fixed in the hole (Fig. 1, 2). The control clutch 3 is mounted on the housing with the possibility of rotation and translational movement S. The clutch has a fork 4 and ledges 5 bent inward to the height of several turns of tape 5. The tooth of the fork 4, with a length of tape width, captures one of the lower spiral turns and keeps it from axial shift . The free end of the tooth may have a bend to the thickness of the turn. Outside the clutch, a handle 6 is located and a latch 7 is mounted, for example a spring ball. The ball interacts with the conical sockets on the barrel body and fixes the sleeve in the socket position. The latch may have a conical shape.

In one embodiment, the barrel 1 has an oval-shaped hole in which an oval elastic spiral nozzle 2 is located (FIG. 3). This design ensures the expiration of the stream spun around the longitudinal axis, especially in the extended position of the nozzle. A swirling jet provides the greatest range of fluid supply. The nozzle opening may have a special non-circular shape, such as an ellipse.

To supply a spray jet, the turns of the spiral nozzle are located with a gap Δ between them (Fig. 4).

The nozzle is operated according to several options for the shape of the jet and flow at constant pressure. In the folded position of the nozzle (see Fig. 1), water flows out with a circular jet, expanding with distance from the nozzle, along a parabolic path. When the coupling 1 is extended to a distance L by the handle 6, the spiral nozzle expands under the pressure of the liquid and acquires a conical, conical hole (see Fig. 2). The round jet emerging through such nozzles is compacted and its path along the parabola lengthens. The greatest range has a swirling jet flowing through the oval nozzle (see Fig. 3).

An extended nozzle with an inter-turn gap forms a sprayed jet to extinguish a weak fire with a wide front (see Fig. 5).

A specific example of execution. A nozzle in the form of a flat spiral of six turns of elastic tape with a thickness of 1.5 mm and a width of 35 mm is installed in the hole of the barrel body with a diameter of 34 mm. The diameter of the nozzle hole is 16 mm. The materials of the tapes are high-strength and elastic polymers, composites, elastic metals such as BrB2 beryllium bronze.

The nozzle and hole extended to a maximum length L = 60 mm acquire a confuser shape with a cone angle of 14 ° (see Fig. 2). This angle corresponds to the largest liquid flow rate. At half maximum extension, the cone angle of the nozzle hole is 28 ° and increases the range of the jet while reducing flow.

To form a sprayed jet, the nozzle is untwisted with a sleeve 3 in the direction of arrow n (see Fig. 5) into several turns to form gaps Δ between the turns. The tooth of the fork 4 slips between the turns, leaving the turns of a smaller radius free. For three turns of the coupling, an inter-turn clearance of the order of 1 mm is formed.

The efficiency of the nozzle consists in a quick and easy adjustment of the range and front of the extinguishing fluid.

Sources of information taken into account

1. USSR author's certificate No. 902769, IPC A62C 31/02. Nozzles for a fire barrel. 1982. Prototype.

2. USSR author's certificate No. 1313450, IPC A62C 31/02. Fire barrel. 1987.

3. RF patent №2128086. IPC V05V 1/34. Adjustable fluid nozzles. 1999.

4. Copyright certificate of the USSR No. 963527, IPC A62C 31/00. Device for interrupting the flow of extinguishing agent. 1982.

Claims (3)

1. The nozzle to the fire barrel, comprising a housing, an adjustable nozzle and a control sleeve, characterized in that the nozzle is made in the form of a tape rolled up into a spiral ring, the outer turn of which is fixed in the hole of the housing, and one of the internal turns is connected to a control sleeve mounted on case with the possibility of translational movement and rotation. 2. Nozzles according to claim 1, characterized in that the hole in the housing and the spiral nozzle installed in it have a non-circular, for example oval, shape. 3. Nozzles according to claim 1, characterized in that the turns of the spiral nozzle are installed with a gap relative to each other.

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