A fine spray of liquid

 

(57) Abstract:

The invention relates to a technique of spraying liquid and can be used in fire-fighting techniques, for example, in the composition of sprinkler systems, in agriculture, in the devices of chemical technology in power. The conical surface forming the groove with nozzles made asymmetric with respect to the transverse plane of the body of the sprayer in place of their intersection. The angle between the generatrix of the upper conical surface of the groove and the transverse plane of the hull ranges from 5 to 10°. The angle between the generatrix of the conical bottom surface of the groove and the transverse plane of the hull ranges from 40 to 50°. End the number of nozzles is made in the form located in the longitudinal plane of the hull pairs of mutually perpendicular channels for the fluid, the intersection of which are aligned with the conical surface of the end portion of the chassis and forms the outlet of each nozzle. The number of nozzles is formed by a pair of mutually perpendicular channels, is from 4 to 6. The tapered surfaces of the grooves intersect the channels parallel to the axis of the housing, dividing them into two equal parts. Technical rez the displacement given area. 5 C. p. F.-ly, 1 tab., 1 Il.

The invention relates to a technique of spraying liquid and can be used in fire-fighting techniques, for example, in the composition of sprinkler systems, in agriculture, in the devices of chemical technology in power.

Prior art

Currently widely used in various nozzles of the liquid. For example, a device for multi-level dispersion liquid (see application EN 95115939 A, IPC-6 B 05 B 1/14, publ. 10.09.97), which contains a hollow cylindrical body, the outer generatrix of which is made of at least two tapered grooves, which are provided with channels for the passage of fluid from the internal cavity of the housing. The channels for the passage of fluid is made through the tops of the conical grooves parallel to their axis of symmetry. The axis of the channels in the known device are offset from the vertex of the conical grooves at a distance not more than the value of the radius of the through-channels. The included angle of taper of the grooves ranges from 40 to 60o. Each tier is made of three end-to-end channel, with their axes offset from tier to the next tier at an angle of 60orelative to each other.

Described izuta uneven irrigation with the formation of annular zones, in which the intensity of irrigation varies widely. This applies primarily to the Central zone under the spray, where the intensity is two times less than in more remote from the spray zone. Moreover, in most remote from the spray zones of intensity of irrigation remains low. Thus, it is necessary for the process area with a given intensity has a ring shape with a slight extent. As a result of this unnecessarily increases the flow rate of the sprayed liquid to achieve the desired intensity of irrigation over the entire area of a circle of predetermined sizes.

The closest analogue patented device is sprinkler fine spray (fill), described in patent RU 2111033 C1 (IPC-6 A 62 C 31/02, publ. 20.05.98). Known spray fluid includes a hollow cylindrical body, on the outer surface of which there are several rows of nozzles, each of which is formed by a groove with a symmetric conical surfaces and channels made in the housing parallel to its symmetry axis and is in communication with the internal cavity of the body, the side surface of kototoi of the case is made with an angle in the range from 60 to 90o. In addition, the spray contains additional face a number of nozzles located on the housing side opposite to the nozzle for supplying the liquid. Additional rows of nozzles formed by the intersection of the outer conical grooves of the casing and the side surfaces of the channels, the axes of which are arranged at an acute angle to the axis of symmetry of the body spray.

Use a fine spray of the described construction allows to obtain a uniform volume flow drops fine spray in the range of drop diameters from 30 to 150 μm under a pressure of water not more than 1 MPa. However, the dispenser of this design does not allow to achieve a given distribution of fine droplets on the surface of the irrigation required area without increasing the liquid flow rate. This is due to the fact that the streams of droplets generated most of the nozzles are oriented in the horizontal direction and output from nozzles symmetric distribution relative to the horizontal plane.

The invention

Patentable invention is directed to the creation of a given distribution of the sprayed fine droplets in a particular area of irrigation and neniam uniformity and accordingly, the intensity of the spray liquid over the entire surface of a given area.

The achievement of the technical result due to the fact that the fine spray of liquid, containing a hollow cylindrical body, on the outer surface of which is placed at least one row of nozzles formed a groove with tapered surfaces and the channels made in the housing parallel to its symmetry axis and is in communication with the internal cavity of the body, the side surface which partially intersects the conical surface of the groove, and a pipe for supplying liquid according to the present invention, the conical surface forming the groove is made asymmetric with respect to the transverse plane of the hull at the point of intersection.

In a preferred embodiment, the spray angle between the generatrix of the upper conical surface of the groove and the transverse plane of the hull ranges from 5 to 10oand the angle between the generatrix of the conical bottom surface of the groove and the transverse plane of the hull ranges from 40 to 50o.

The dispenser may contain additional face a number of nozzles located on the housing to rent in the form located in the longitudinal plane of the hull pairs of mutually perpendicular channels for the fluid. The intersection area of the channels in this case is combined with the conical surface of the end portion of the chassis and forms the outlet of each nozzle.

The number of nozzles is formed by a pair of mutually perpendicular channels, it is desirable to choose from 4 to 6.

It is advisable that the conical surface grooves crossed channels parallel to the axis of the housing, dividing them into two equal parts.

The asymmetry of making conical surfaces forming the grooves in the specified range of angles allows you to organize uniform atomization of the liquid at the periphery of a circle with a gradual decrease in intensity in a narrow Central area. Extra end of the nozzle only increases the intensity to the desired quantity of fluid in the Central region, located directly under the nozzle.

The best uniformity of liquid atomization is achieved by using additional end of the nozzle 4 to 6 pairs of mutually perpendicular channels, intersecting on the conical surface of the housing. In this case, the deviation of the intensity of irrigation does not exceed 20%. This will be enough to ensure the required Inti its consumption in areas with low intensity of the spray.

The best conditions for uniform spraying of the liquid is achieved also when selecting the angles of the asymmetric tapered grooves in certain ranges of angles relative to the transverse plane of the body of the nozzle. Increasing the angle between the generatrix of the upper conical surface of the groove and the transverse plane of the body of the sprayer over the limit value (5oleads to unproductive increase the angle of the torch spray liquid over 180owhile lower angle less than the lower limit value (10oto reduce the irrigated fluid space with a given intensity.

For the lower side of the groove increasing the angle between the generatrix of the conical bottom surface of the groove and the transverse plane of the hull over 50oleads to non-uniformity of spray liquid in the peripheral area of the irrigated area, and a smaller angle of less than 40oto the non-uniformity of spray liquid in the Central region.

Information confirming the possibility of carrying out the invention

Further, the patented invention is illustrated by description of a specific example of the execution and the attached drawing, which shows the con is ly cylindrical housing 1 with an inlet 2 inlet fluid. On the outer surface of the housing 1 has two rows of nozzles formed by the grooves 3 with a conical surfaces and channels 4, made in the housing 1 parallel to its axis of symmetry. Channel 4 is in communication with the internal cavity of the housing 1. The side surface of the channel 4 partially intersects the conical surface of the groove 3.

Conical surface forming each groove 3, is made asymmetric with respect to the transverse plane of the housing 1 (horizontal plane) at the point of intersection. Forming the upper conical surface of the groove 3 formed with a transverse plane of the housing 1 angle equal to 7oand forming the lower conical surface of the groove 3 is an angle equal to 45o.

On the housing 1 on the side opposite the pipe 2 for supplying fluid made optional end the number of the nozzles 5, which are formed by five pairs of mutually perpendicular channels 6 for the passage of fluids that intersect on the conical side surface of the bottom of the casing 1 and forming the outlet of each nozzle. Paired channels 6 are at right angles to each other in the longitudinal planes of the housing 1. The conical end surface of the housing 1 is carried evenly placed three in each row of nozzles and offset from the channels adjacent rows of nozzles adjacent rows. When you outlet openings of the nozzles formed by the grooves 3, are located on the side surface of the housing 1 in a checkerboard pattern, creating favorable conditions for spraying the liquid.

The conical surface of the groove 3 is crossed by channels 4, dividing them into two equal parts. In this implementation provided with the same speed counter flow of the liquid inside the channel 4 and the uniform expiration of the liquid flow from the outlet nozzle having a complex shape formed by the intersection of the conical surfaces of the grooves 3 and the cylindrical surface of the channels 4.

Work fine spray of liquid is carried out as follows.

The atomizer is installed in a working condition in a vertical position. When applying a liquid into the casing 1 through the pipe 2 under the action of pressure difference of 0.4 - 0.8 MPa in the channels 4 are formed counter flow of liquid, rushing to the output nozzle holes formed by the channels 4 in the grooves 3.

After the collision of fluid flow in the channels 4 and the outflow through the outlet openings, the formation of fan-shaped gas-liquid flow in the form of a shroud. Angle revealed the generated stream is broken down into small droplets. Due to the non-symmetry of the conical surfaces of the grooves 3 relative to the transverse plane of the housing 1 (horizontal plane) stream of fine droplets deviates from the horizontal direction at an angle in the range from 10 to 15o. The angular deviation of the stream of droplets increases the uniformity of spray liquid over the entire surface with a slight reduction in irrigated surface.

In pairs of mutually perpendicular channels 6 end rows of nozzles 5 implements a similar mechanism of fragmentation of liquid droplets, but generated palaeobotany flow deviates from the horizontal plane at a greater angle in the range from 45 to 60oin the direction towards the Central area of the irrigated surface located directly under the spray. This distribution of the sprayed liquid can improve the uniformity of spraying liquid over the Central part of the irrigated surface.

The results of comparative tests fine spray of liquid according to the present invention and other known dispensers equivalents presented in the accompanying table.

When testing required online is here fine spray, made according to the present invention, when it is used for uniform irrigation of the surface in the form of a circle area of 27.3 m2. The deviation of the intensity of irrigation surface between the Central and peripheral area of irrigated surface made up of 0.005 kg/m2C. compared with the stated atomizer to create the given intensity of irrigation (0.025 kg/m2(C) on the entire surface of a defined area using known spray-analogues need to increase the liquid flow rate from 1.3 to 2.5 times.

Experimental data confirm the possibility of achieving a technical result of applying a fine spray is made according to the present invention.

Industrial applicability

Patented fine spray relates to techniques for spraying liquid. The invention can be used in fire-fighting techniques, for example, in the composition of the sprinkler fire extinguishing systems, in agriculture for spraying different types of substances on crop acreage and production facilities, and devices of chemical technology in power for fuel atomization.

The AOC is todisperse fluid flows in a closed, and open space.

1. A fine spray of liquid, containing a hollow cylindrical body, on the outer surface of which is placed at least one row of nozzles formed a groove with tapered surfaces and the channels made in the housing parallel to its symmetry axis and is in communication with the internal cavity of the body, the side surface which partially intersects the conical surface of the groove, and a pipe for supplying fluid, characterized in that the conical surface forming the groove is made asymmetric with respect to the transverse plane of the hull at the point of intersection.

2. Spray under item 1, characterized in that the angle between the generatrix of the upper conical surface of the groove and the transverse plane of the hull ranges from 5 to 10oand the angle between the generatrix of the conical bottom surface of the groove and the transverse plane of the hull ranges from 40 to 50o.

3. Spray on p. 2, characterized in that it contains additional face a number of nozzles located on the housing side opposite to the nozzle for supplying the liquid.

4. Spray on p. 3, characterized in that the end range of the force is for the supply of liquid, the intersection of which are aligned with the conical surface of the end portion of the chassis and forms the outlet of each nozzle.

5. Spray on p. 4, characterized in that the number of nozzles formed by a pair of mutually perpendicular channels, is from 4 to 6.

6. The dispenser according to any one of the preceding claims, characterized in that the tapered surfaces of the grooves intersect the channels parallel to the axis of the housing, dividing them into two equal parts.

 

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