RU2263549C2 - Pneumoacoustic atomizer of a liquid - Google Patents

Abstract

FIELD: agriculture; devices for an atomization of a liquid.

SUBSTANCE: the invention is pertaining to the field of agriculture, in particular, to devices for an atomization of a liquid and may be used in the spraying equipment used for chemical protection of plants, in fog generators for a sheltered ground, at decontaminating treatment of livestock barns and animals. The pneumoacoustic atomizer of a liquid has a body of a nozzle, a rod-type emitter coaxially located in the body of the nozzle in the shut-type bearings and fixed to prevent its axial movement by a retaining ring. On the bush there is a compressed air feeding union enveloping the body of the nozzle and fixed by a retaining nut. Such a junction forms an air duct of the ring-type form, which through the union and uniformly distributed holes in the body of the nozzle is connected to a compressed air supply system. A concentric nozzle with its the conical part enveloping the body of the nozzle with a backlash, is connected to a liquid supply system by the union and braced to the bush by a sleeve nut. On the end of the rod-type emitter protruding beyond the shear of the nozzle body there is a fixed resonator of the acoustic vibrations. In the resonator cavity there is an elastic component protected by a high-wear-resistant reflective washer mounted with a backlash in the resonator. The offered design of the pneumoacoustic atomizer ensures uninterrupted operation, and also retention of a strictly directional and whirling a finely dispersed cloud of an aerosol increasing the aerosol capability to penetrate deep into a volumetric crown, ensures the address hit of drips on the elements of plants and reduced losses of an aerosol liquid particles to a minimum with a more uniform distribution of the drips on the treated object and so increasing efficiency of the liquid atomization.

EFFECT: the invention ensures increased efficiency of the liquid atomization.

3 cl, 2 dwg

Description

The invention relates to agriculture, and in particular to devices for spraying liquid, and can be used in spraying equipment for chemical plant protection, in foggers for protected soil, during the decontamination of livestock buildings and animals.

Known acoustic nozzle containing a housing with an outlet, the axis of which is installed a pipe for supplying a spray liquid, a swirl chamber with a confuser-cylindrical outlet section provided with a reflector on the periphery, forming a ring resonating cavity with the pipe end facing the entrance to the annular gap for air supply located perpendicular to the axis of the nozzle, and the output to the outlet [1].

The disadvantage of this nozzle is the uneven distribution of droplets on the surface to be treated, in particular due to the large width of the conical spray pattern, some of the droplets flying out of the nozzle with a large angle with respect to the direction of processing do not change their strict direction, which leads to fluid loss and their uneven distribution, and also when spraying highly concentrated suspensions with high viscosity, it is able to clog.

The closest in technical essence to the proposed one is a pneumatic-acoustic liquid atomizer containing a nozzle body, a fixed rod emitter placed in it, a resonator and a concentric nozzle installed with a gap above the nozzle body, which is hydraulically connected to the liquid supply system [2].

The disadvantage of this sprayer is the uneven distribution of droplets on the treated surface, poor penetration of the aerosol into the crown of plants and its targeted contact with plant elements, the inability to control the spray pattern of the liquid and a small margin of wear resistance of the resonating diaphragm.

The purpose of the invention is to increase the efficiency of spraying liquids, increasing the penetrating ability of the aerosol deep into the volumetric crown of plants, ensuring targeted droplets on plant elements, stepless regulation of the spray pattern of the liquid with a uniform distribution of droplets across the treated object and ensuring uninterrupted operation of the sprayer.

This goal is achieved by the fact that a rod radiator is mounted in the nozzle body with the possibility of rotation around its longitudinal axis and fixed by an retaining ring from axial movement, the ring-shaped air channel formed between the nozzle body and the sleeve is in communication with the compressed air supply system by means of a fitting mounted on sleeve, and with evenly distributed holes in the nozzle body, while the sleeve relative to the nozzle body is fixed with a lock nut, and a concentric nozzle, covering its the conical part of the nozzle body with a gap, connected to the fluid supply system by a fitting and pulled to the sleeve by a union nut, an acoustic oscillator is fixed at the end of the rod emitter protruding beyond the nozzle body section, in the cavity of which an elastic element is mounted, protected by a highly wear-resistant reflective washer installed with a gap in the cavity.

In Fig.1 shows a pneumatic acoustic liquid atomizer;

figure 2 is a section aa in figure 1.

The pneumatic-acoustic liquid atomizer shown in Fig. 1 includes a nozzle body 1 coaxially placed in the nozzle body 1 in bearings 2 of a closed type, a rod emitter 3 fixed from axial movement by a retaining ring 4. On a sleeve 5 covering the nozzle body 1 and a fixed lock nut 6, fitting 7 for supplying compressed air is installed. Such a connection forms an annular air channel 8, which, through the nozzle 7 and the evenly distributed openings 9 in the nozzle body 1, is connected to a compressed air supply system (not shown).

The concentric nozzle 10, with its conical part covering the nozzle body 1 with a gap, is connected to the fluid supply system (not shown) by the fitting 11 and pulled to the sleeve 5 with a union nut 12.

At the end of the rod emitter 3, protruding beyond the slice of the nozzle body 1, a resonator 13 of acoustic vibrations is fixed. An elastic element 15 is mounted in the cavity 14 of the resonator 13, which is protected by a highly wear-resistant reflective washer 16 mounted with a gap in the resonator 13.

Pneumoacoustic spray liquid works as follows.

Compressed air supplied through the nozzle 7 to the air channel 8 and passing through evenly distributed openings 9 (Fig. 2), flows from the outlet of the gas-jet emitter formed by the internal volume of the nozzle body 11 at its outlet and the rod emitter 3, as a result of which a vacuum is created in the volume of the concentric nozzle 10. Under the action of this vacuum, the incoming liquid is sucked through the nozzle 11 into the resonating cavity formed by the edge of the nozzle body 1 and the cavity 14 of the resonator 13, where it is supplied under constant pressure By pouring air, creating variable sound vibrations, it splits and sprays the liquid into small droplets, forming a highly dispersed aerosol.

The elastic element 15, the geometric dimensions of which are selected from the calculation of the resonant frequency of sound vibrations, increases the acoustic effect. The reflecting washer 16, moving in the cavity 14 under the pressure of air vibrations, protects the elastic element 15 from wear.

A sprayed cloud of small droplets of liquid in the air stream flows around the resonator 13 and, reflected from the outer wall of the concentric nozzle 10, receives a swirl from the rotating resonator 13 relative to its longitudinal axis. The change in the frequency of rotation of the resonator 13 affects the degree of turbulence and the spray pattern of the resulting aerosol stream directed to the object being processed.

The proposed design of a pneumatic-acoustic liquid sprayer with an elastic element with a highly wear-resistant reflective washer ensures uninterrupted operation, as well as the presence of a strictly directed and swirling fine aerosol cloud, which increases the aerosol penetration depth into the volume crown, ensures that droplets are targeted to the plant elements, minimizes the loss of liquid particles to a minimum with a more uniform distribution of droplets on the treated object, thereby increasing the efficiency p spylivaniya liquids.

The prototypes of the proposed pneumatic-acoustic liquid sprayer worked for more than a year in the conditions of one of the farms of the Kabardino-Balkarian Republic with the chemical protection of fruit trees planted using intensive technology. Tests have shown good results of the proposed pneumatic-acoustic liquid atomizer and confirmed the possibility of effective liquid flow when using it by increasing the penetrating ability of the aerosol deep into the crowns of fruit trees and their uniform distribution on the leaf surface on both sides.

Sources of information

1. RF patent No. 2103601, 05 B 17/06, 1998.

2. USSR author's certificate No. 1509123, B 05 B 17/06, 1989 [prototype].

Claims (3)

1. A pneumatic-acoustic liquid atomizer comprising a nozzle body, a rod emitter placed therein, a resonator and a concentric nozzle installed with a gap above the nozzle body, which is hydraulically connected to the liquid supply system, characterized in that the rod emitter is rotatably mounted in the nozzle body longitudinal axis and fixation from axial movement by the locking ring. 2. The atomizer according to claim 1, characterized in that the annular air channel formed between the nozzle body and the sleeve is in communication with the compressed air supply system through a nozzle mounted on the sleeve and with evenly distributed holes in the nozzle body, the sleeve being in relation to the nozzle body is fixed with a lock nut. 3. The sprayer according to claim 1, characterized in that an elastic element is mounted in the cavity of the resonator, which is protected by a highly wear-resistant reflective washer installed with a gap in the resonator.

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