RU2482928C1 - Kochetov's gas-drop jet generator - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to gas-drop jet generation and may be used in fire fighting, agriculture, etc. Fluid feed comprises forcing fluid axially via feed branch pipe, confuser and cylindrical nozzle aligned and communicated with said branch pipe. Fluid tangential feed is executed via conical cartridge aligned with cylindrical nozzle with vortex annular chamber secured atop cylindrical part of said cartridge and provided with fluid feed pipe. Two lines of fluid feed tangential channels are made along edges of said annular chamber. At least three tangential channels are arranged in every said line to communicate annular chamber with housing cylindrical chamber.

EFFECT: higher efficiency of fire fighting.

2 cl, 2 dwg

Description

The invention relates to a technology for generating gas-droplet jets of increased long-range and can be used in fire fighting equipment, agriculture, irrigation and other industries associated with the need to create long-range gas-liquid jets.

The closest object of the claimed device is the installation for creating a gas-droplet jet according to the patent of the Russian Federation No. 21075541, which contains a liquid and gas supply system and a gas-dynamic nozzle with a chamber for mixing liquid and gas.

A disadvantage of the known device is the impossibility of increasing, with the help of known means, the range of a gas-droplet jet over 50 m, which is necessary, for example, to extinguish fires in high-rise buildings and high-rise structures.

EFFECT: increased fire extinguishing efficiency by increasing the range of a gas-droplet jet and its fine dispersion when interacting with an object.

This is achieved by the fact that in the device for creating a gas-droplet jet containing liquid and gas supply systems and a nozzle, the liquid supply system is carried out in two directions, including an axial liquid supply through the inlet pipe and a confuser and a cylindrical nozzle connected in series and coaxial with it, and the tangential the fluid is supplied through a coaxial housing with a cylindrical nozzle in the form of a cylindrical-conical sleeve, on the cylindrical part of which a vortex annular chamber with a pipe For liquid supply, in this case, two rows of tangential channels supplying liquid are made along the edges of the annular chamber, while in each row there are at least three tangential channels connecting the annular chamber to the cylindrical cavity of the housing to which the profiled nozzle is coaxially attached.

Figure 1 shows a functional diagram of a device for creating a long-range gas-droplet jet, figure 2 is a view a of figure 1.

A device for creating a long-range gas-droplet jet (Fig. 1) contains a two-way fluid supply system, including an axial fluid supply through a supply pipe 1 and a confuser 3 and a cylindrical nozzle 4 connected in series and coaxial with it. The tangential fluid supply is through a coaxial with a cylindrical nozzle 4 the housing 5 in the form of a cylindrical sleeve, on the cylindrical part of which a vortex annular chamber 6 with a nozzle 7 for supplying liquid is fixed, while along the edges of the annular chamber 6 is made There are two rows 8 and 9 of tangential channels supplying liquid (not shown in the drawing), while in each row there are at least three tangential channels connecting the annular chamber 6 with the cylindrical cavity 10 of the housing 5, to which the circular plate 11 is coaxially attached (Fig.2), located perpendicular to the axis of the vortex annular chamber 6 and rigidly connected to the cylindrical cavity 10 of the housing 5 in its end section, and a slotted nozzle 12 made in the form of a rectangular parallelepiped is attached perpendicular to the circular plate 11 and with a throttle through hole of rectangular cross section 13 connected to the cavity of the housing 5.

A device for creating a long-range gas-droplet jet works as follows.

The device moves to its original position with the help of a vehicle (not shown in the drawing) and is directed towards the object to which the gas-droplet jet is to be supplied by means of the control action of the nozzle movement control system (not shown in the drawing). The turbocompressor unit, which is part of the gas supply system, is turned on, and the accelerated air flow from the output device of the power plant is sent to the gas supply inlet 2 to the mixing chamber 10, where a two-phase flow occurs.

Liquid vortices are injected into the mixing chamber 10 through tangential channels placed in rows 8 and 9, which are mixed with the incoming air flow, resulting in a gas-droplet flow. The maximum values of the air pressure at the inlet to the nozzle and the relative concentration of water in the two-phase flow are selected from the condition of extremely tight packing of water particles in the air flow: gP = 5.7108 Pa, where P is the gas pressure at the inlet to the nozzle; g is the relative concentration of water in a two-phase flow. To achieve the required (over 50 m) range of a gas-droplet jet, the gas (air) pressure at the inlet to the nozzle must exceed P = 5.5105 Pa;

g = Gin / Gvoz = 4.9

where Gin = 26 kg / s is the mass flow rate of water; Gvoz = 5.3 kg / s - mass air flow; Tcm = 298 K is the temperature of the two-phase flow; L = 1500 mm - the length of the body 5 of the cylindrical sleeve with a nozzle; D = 50 microns - the average diameter of water droplets in the air stream.

The two-phase flow created in the mixing chamber 10 with the above parameters is accelerated in the profiled channel of the nozzle 12. Using the nozzle allows you to compact a gas-droplet jet with a relatively uniform distribution of water droplets over the cross section of the jet.

The results obtained indicate that a two-phase flow, the parameters of which are selected according to the above conditions, is accelerated in the gas-dynamic housing to a speed at which the range of the gas-droplet jet is 65 m.

The proposed invention can be used in various fields of technology where the generation of long-range gas-droplet jets is required, the flight range of which exceeds 50 m. The invention is most effectively used in fire fighting equipment, especially when fighting fires in hard-to-reach centers and objects, and in agriculture during land irrigation.

Claims (2)

1. A device for creating a gas-droplet jet containing a fluid and gas supply system and a nozzle, characterized in that the fluid supply system is carried out in two directions, including an axial fluid supply through the inlet pipe and a confuser and a cylindrical nozzle connected in series and coaxial with it, and the tangential the fluid is supplied through a coaxial housing with a cylindrical nozzle in the form of a cylindrical-conical sleeve, on the cylindrical part of which a vortex annular chamber with a pipe for fluid supply, while at the edges of the annular chamber there are two rows of fluid supplying tangential channels, while in each row there are at least three tangential channels connecting the annular chamber to the cylindrical cavity of the housing to which the shaped nozzle is coaxially attached. 2. A device for creating a gas-droplet jet according to claim 1, characterized in that a circular plate coaxially attached to the cylindrical cavity of the casing is located perpendicular to the axis of the vortex annular chamber and rigidly connected to the cylindrical cavity of the casing in its end section, and a slotted nozzle is attached perpendicular to the round plate made in the form of a rectangular parallelepiped with a throttle through-hole of rectangular cross section connected to the cavity of the housing.

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