SU869827A2 - Apparatus for spraying solutions - Google Patents

Description

(54) DEVICE FOR SPRAYING THE SOLUTIONS

one

The invention relates to sprayers of charged material particles and can be used for spraying fertilizers, growth promoters and herbicides in greenhouses, as well as drugs in poultry houses, and is an improvement of the known device described in the authors. 662156.

According to the main auth. No. 662156, a device is known comprising a housing on which a disk fixedly connected to a high-speed source is fixed, and mounted on a shaft and a lightened spray disk with an impeller mounted on it located between said discs, and the impeller on the spray disk is installed with a gap to it, equal to 0.05-0.4 the distance between the disks 1.

A disadvantage of this device is that when spraying solutions with a high electrical conductivity, the film of the sprayed liquid receives a maximum charge, not income to the edge of the spray disc, there occurs a premature separation of the charged liquid particles and sticking them on the disk connected to the high pressure source. which causes electrical breakdown of the air gap between the disks, as well as reduces the efficiency of charging the particles.

 The purpose of the invention is to prevent electrical breakdown of the gap 10 between the disks and increase the efficiency of particle charging.

To achieve this goal, the known device for spraying the solutions is provided with spaced between

5 disc blades made of non-conductive material and mounted on a spray disc, one side of each blade forming an angle of 30-85 with the plane of the spray disc.

Figure 1 presents the proposed device, a General view; in FIG. 2, node I in FIG.

The device for spraying the solutions comprises a housing 1 on which. rigidly using insulating posts 2 fixed disk 3 connected to a high voltage source (not shown in the drawings) and a spray disk 4 mounted on

drive shaft 5 using a washer 6 and a nut 7 and grounded. An impeller 9 made of a non-conducting material is mounted on a spray disc with a gap thereto through the gaskets 8. The gap between the impeller 9 and the spray disk 4 is 0, the distance between the disks 3 and 4 is, for example, 5 mm.

A tube 10 is provided for supplying the solution. The device is equipped with blades 11 arranged between the disks 3 and 4, made of a non-conductive material and mounted on the spray disk 4 with a gap to it through insulating gaskets 12.

One of the sides of each blade forms an angle of 30-85 ° with the cavity of the spray disc.

The device works as follows.

The solution is fed through the tube 10 into the central part of the spray disc 4, the circumferential speed of which is not less than 35 m / s. Due to this, the liquid spreads a thin film over the surface of the spray disc 4, which is facilitated by the gap between the latter, the impeller 9 and the blades 11. The centrifugal forces move the film of the sprayed liquid to the edge of the spray disc 4. When this film reaches the electric field, which is created by the disc 3, an electric charge acts on its surface. Depending on the edge of the disk 4, the film disintegrates into the smallest homogeneous particles, which carry a certain part of the charge that protrudes on the surface of the film. The air flow generated by the impeller 9 picks up the charged particles and distribute them evenly throughout the room. In addition, this air flow prevents the deposition of charged particles on the inside of the disk 3, which can lead to undesirable air gap breakdown between the disks 3 and 4, and also reduces the leakage between them, which increases the performance of the device on the convective current. However, when spraying solutions with high electrical conductivity

some parts are detached from the spray disk 4 and move toward the disk 3. In doing so, they are caught by the blades 11, which, together with the spray disk, rotate at high speed. The resistance force that air creates by rotating blades 11 moves these particles along the inclined side of the blades

11 on the spray disc 4.

When the angle OL is more than 85 °, particles detached from the spray disk 4 are also caught by the vanes 11, but in this case they mainly move not to the plane of the spray disk 4, but to the edge of the blades 11, where they break off in the form of large drops .

At an angle with less than 30 at the same thickness of the blades

12 it is necessary to significantly increase the width of the inclined side of the blades, which causes difficulties associated with balancing them on the spray disc.

The described device is reliable and efficient in operation, since it prevents electrical breakdown of the air gap between the disks and increases the efficiency of particle charging, as well as creates additional airflow, which increases the spray gun radius.

Claims (1)

1. USSR author's certificate 662156, cl. B 05 B 5/04, 1977. (prototype).