RU2585628C1 - Kochetov's swirl atomiser - Google Patents

Abstract

FIELD: instrument making.

SUBSTANCE: invention relates to technique for generation of gas-drop jets of increased range and can be used in fire engineering, in agriculture for irrigation and other industries. Swirl atomizer comprises fluid and gas supply systems and a nozzle. Fluid supply system is realized in two directions, including axial supply of fluid via a feed branch pipe and the series-connected and coaxial with them confusor and cylindrical nozzle. Liquid is tangentially supplied through a coaxial, with a cylindrical nozzle, body in the shape of a cylinder-conic sleeve. On the cylindrical part of the sleeve there is fixed a circular swirl chamber with a branch for supply of fluid. On edges of the circular chamber there are made two rows of liquid supplying tangential channels. In each row there are at least three tangential channels connecting the circular chamber with the cylindrical cavity of the chamber, to which there is coaxially fixed a round plate. Round plate is located perpendicular to the axis of the swirl circular chamber and is rigidly connected to the cylindrical part of the chamber in its end section. Perpendicular to the round plate there is attached a slotted nozzle which is a combination of two mutually perpendicular rectangular parallelepipeds with throttle through holes of rectangular section, connected to the body cavity. Coaxially to the peripheral part of the round plate there is a two-phase flow spreader made in the form of a perforated conical surface covering the slotted nozzle with throttle through holes of rectangular section connected to the body cavity.

EFFECT: there is ensured a higher efficiency of formation of a gas-droplet jet and a wider zone of its supply.

1 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 to the proposed invention is a device 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.

The technical result is an increase in the efficiency of formation of a gas-droplet jet and the expansion of its feed zone.

This is achieved by the fact that in the vortex nozzle containing the fluid and gas supply systems and the nozzle, the fluid supply system is carried out in two directions, including the axial fluid supply through the supply pipe and the confuser and the cylindrical nozzle connected in series and coaxial with it, and the tangential fluid supply is carried out 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 supplying fluid is fixed, while m along the edges of the annular chamber there are two rows of fluid supplying tangential channels, each row having at least three tangential channels connecting the annular chamber to the cylindrical cavity of the casing, to which a circular plate is arranged coaxially, located perpendicular to the axis of the vortex annular chamber and rigidly connected with a cylindrical cavity of the body, in its end section, and a slot nozzle is attached perpendicular to the round plate, the slot nozzle is made combined and consists of two of perpendicular rectangular parallelepipeds with throttle through-holes of rectangular cross section connected to the body cavity, and a biphasic flow divider made in the form of a perforated conical surface encompassing a slotted nozzle with throttle through-holes of rectangular cross section connected to the body cavity to the peripheral part coaxially to the round plate .

In FIG. 1 shows a vortex nozzle, in FIG. 2 is a view A of FIG. one.

The vortex nozzle (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 carried out through a housing 5 in coaxial with a cylindrical nozzle 4 in the form of a cylindrical sleeve, on the cylindrical part of which a vortex annular chamber 6 is fixed with a nozzle 7 for supplying liquid, while along the edges of the annular chamber 6 there are two rows 8 and 9 of liquid supplying tanks genital channels (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 vortex axis annular chamber 6 and rigidly connected to the cylindrical cavity 10 of the housing 5, in its end section, and perpendicular to the circular plate 11, a slotted nozzle 12 is attached, which is made combined and consists of two mutually perpendicular rectangular parallelepipeds 13 and 14 with throttle through-holes of rectangular cross section connected to the cavity of the housing 5. Coaxially to the circular plate 11 is attached to its peripheral part a two-phase flow divider 15, made in the form of a perforated conical surface covering the slotted nozzle 12 with throttle through holes of rectangular cross-section, connected to the cavity of the housing 5.

Vortex nozzle operates 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 the formation of a two-phase flow takes place.

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 dense 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 slotted combined nozzle 12 in two mutually perpendicular directions along the throttle through holes of rectangular cross section made in rectangular parallelepipeds 13 and 14. Using the combined nozzle allows you to compact a gas-droplet jet with a relatively uniform distribution of water droplets along the jet cross section and expand the gas-droplet jet supply zone.

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 branches 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 when irrigating land.

Claims (1)

A vortex nozzle containing fluid and gas supply systems and a nozzle, a fluid supply system is carried out in two directions, including an axial fluid supply through a supply pipe and a confuser and a cylindrical nozzle connected in series and coaxial with it, and a tangential fluid supply is provided through a housing coaxial with a cylindrical nozzle in the form of a cylindrical-conical sleeve, on the cylindrical part of which a vortex annular chamber is fixed with a nozzle for supplying fluid, while along the edges of the annular chambers Two rows of fluid-supplying tangential channels have been made, with each row having at least three tangential channels connecting the annular chamber to the cylindrical cavity of the housing, to which the circular plate coaxially attached is located perpendicular to the axis of the vortex annular chamber and rigidly connected to the cylindrical cavity of the housing in its end section, and perpendicular to the round plate, a slotted nozzle is attached, characterized in that the slotted nozzle is made combined and consisting of two inter about perpendicular rectangular parallelepipeds with throttle through-holes of rectangular cross section connected to the body cavity, and a biphasic flow divider made in the form of a perforated conical surface encompassing a slotted nozzle with rectangular throttle through holes connected to the body cavity and coaxially to the circular plate to its peripheral part .

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