RU2538406C1 - Mouthpiece for fire hose nozzle - Google Patents

Abstract

FIELD: fire safety.

SUBSTANCE: mouthpiece for fire hose nozzle consists of a housing with a conical and a nozzle cylindrical parts. Inside the housing a bluff body is mounted. The mouthpiece is additionally provided with a cylindrical pipe - nozzle orifice attached to the end conical part of the housing at an angle of slope A equal to 120°-170°. The length of the pipe - nozzle orifice L=1.2-2D1, where D1 is the inner diameter of the nozzle orifice, which is greater than the inner diameter of the conical part of the mouthpiece D due to which a ledge - a specific "redan" is created, which height is h=0.5-2 mm. Along the perimeter of the pipe - nozzle orifice the through injection holes are made, having the diameter d, equal to 1.5-3 mm, in amount of n, determined by the ratio n=3.14×D1/4. The through holes along the perimeter of the pipe - nozzle orifice in amount of n pieces are arranged strictly along the diameter of the nozzle orifice near the ledge - "redan".

EFFECT: reduction of the wetted surface and reduction of friction of water against the walls of nozzle orifice to increase the flow rate and flying range of the jet.

2 cl, 2 dwg

Description

The invention relates to fire fighting equipment, and in particular to devices for supplying a fire extinguishing fluid.

A fire barrel is known, comprising a housing with a ball plug installed in it with a hole and screw channels made therein, a washer with a hole installed in front of the plug, and nozzles mounted on the body, while it has a spherical body and a straightening grid with a hole in the center, moreover, the spherical body is freely placed in the ball plug, and its diameter is larger than the diameter of the opening of the rectifying lattice, while the mass of the spherical body is less than the mass of the same volume of the quenching fluid, and the hole in the washer is located in the center with the axis of the straightening grid and nozzle / SU A.C. No. 1066616, 1984, bull. No. 2 /.

The well-known barrel with a nozzle has significant hydraulic resistance, is relatively complex and does not have a sufficient range of the jet.

Known nozzles for a fire barrel containing a cylindrical nozzle placed with a gap in the hollow cylindrical body, the nozzle also has guide vanes mounted on the nozzle at the outlet of the nozzle at an angle to the direction of flow, the inner contour of the wall of the body in front of the blades is made according to the Vitoshinsky curve, and the nozzle is equipped with an end fairing with support fields for supplying a fire extinguishing component to the nozzle, each blade being made with a ratio of width and length equal to 1/5 / SU AC No. 1042224, 1984, bull. No. 24 /.

Known nozzles low-tech in the manufacture and does not have a sufficient range of the jet.

The closest is the nozzle for a fire barrel, according to the patent RU / No. 79045 of 09/15/2008

The known solution does not have the possibility of turbulence in the radial directions of the jet cross section, which reduces the continuity and range of the jet.

The objective of the invention is to increase the range of the jet of extinguishing fluid, increasing work efficiency and reducing structural complexity.

The technical result when using the invention is to create a simple design nozzle of high quality in extinguishing fires.

The specified technical result is achieved in that the nozzle for the fire barrel consists of a housing with a conical and nozzle cylindrical parts. A wrap body is installed inside the body. The nozzles are additionally equipped with a cylindrical nozzle - a spray connected to the end conical part of the body with an inclination angle A equal to 120 ^° -170 ^° . The length of the nozzle - spray L = 1.2-2D1, where D1 is the inner diameter of the spray, which is larger than the inner diameter of the conical part of the nozzle D. Due to this, a ledge is created - a kind of "redan", the height of which is h = 0.5-2 mm. Along the perimeter of the nozzle - spray, there were made through injection holes with a diameter d of 1.5-3 mm, in an amount of n, determined by the ratio n = 3.14 × D1 / 4. The through holes along the perimeter of the nozzle - spray in the amount of n pieces are located strictly along the diameter of the spray in the area of the “redan” ledge with the possibility of significantly reducing the wetted surface and reducing the friction of water against the spray walls, in order to increase the flow velocity and the range of the jet.

Figure 1 shows a section of a General view of the nozzle; figure 2 - node output part of the nozzle.

The nozzle consists of a housing 1 with a conical and nozzle cylindrical parts. A wrap body 2 is installed inside the casing. The nozzle is additionally equipped with a cylindrical nozzle - spray 3 connected to the end conical part of the casing with an inclination angle A equal to 120 ^° -170 ^° . The length of the nozzle - spray L = 1.2-2D1, where D1 is the inner diameter of the spray, which is larger than the inner diameter of the conical part of the nozzle D. This creates a ledge - a kind of "redan" 4, whose height h = 0.5-2 mm.

The nozzle for the fire barrel works as follows.

The body of the flow around 2 is installed and fixed in the conical part of the nozzle 1. When the fluid flow through the redan 4, the jet is compressed to a diameter D and passes through the spray 3 without touching its walls, and also injects air through the holes 5, creating an air film that reduces friction of the stream of the jet against the walls of the spray. As a result, the range of the jet increases.

Application usage example:

Based on the experiments, data were obtained on the operation of the nozzle.

Example 1:

in the absence of redan, the range of the jet reached 20-22 meters.

Example 2:

in the absence of holes around the perimeter of the nozzle, the range of the jet reached 17-19 meters.

Example 3:

in the manufacture of redan and holes along the perimeter of the nozzle, the jet range was 33-35 meters.

Claims (2)

1. A nozzle for a fire barrel including a housing with a conical and cylindrical parts of the nozzle, which is installed inside the flow body, characterized in that the nozzle is further provided with a cylindrical pipe - showers, attachable to the end face of the conical portion of the housing, with the inclination angle A, of 120 ^° - 170 ^° , the length of the nozzle - spray L = 1.2-2 D1, where D1 is the inner diameter of the spray, which is larger than the inner diameter of the conical part of the nozzle D, with the possibility of creating a ledge - a kind of "redan", the height of the ledge h = 0.5-2 mm, and around the perimeter cleaning - spray, through injection holes with a diameter of d equal to 1.5-3 mm, in an amount of n, determined by the ratio: n = 3.14 · D1 / 4, were made. 2. Nozzles according to claim 1, characterized in that the through-hole injection around the perimeter of the nozzle - spray in the amount of n pieces are located exactly according to the diameter of the spray in the area of the ledge - "redan", with the possibility of significantly reducing the wetted surface and reducing the friction of water on the walls of the spray , to increase the flow rate and range of the jet.

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