SU762991A1 - Atomizer - Google Patents

Description

The invention relates to a device for applying to the products of granular materials by the method of spraying.

A spray gun for applying powder materials is known, which contains a material pipeline with a reflector attached to it, a channel for supplying air and a diffuser £ ΐ}.

A significant drawback of such a combination of dust blowers is the dependence of the quality of the spraying of the material on the work of the dosing system and transportation of the material. The dosing of the material is carried out by an ejection pump, and by _ giving it to the dispenser by pneumatic conveying. An ejection pump often clogs during operation and requires cleaning, and cannot provide even delivery.

Also known is a nebulizer containing a stinging body, a material conduit, and a nozzle with a swirling chamber having potentially connected air ducts to it [2].

This sprayer is naibo-25 closer to the invention in its technical essence and the achieved result.

The disadvantage of it is the impossibility of using it without ejection 30

pump feeding granular material from the hopper.

The aim of the invention is to simplify the design.

This goal is achieved by the fact that in the known sprayer containing the body, the material line and the nozzle with the twist chamber, having air channels tangentially connected to it, the output end of the wire material is plugged with a reflector, while the material tube is connected to the strip of the twist chamber.

In addition, the dimensions of the nozzle and tangentially supplied air channels are expressed by the ratios

where 44 is the diameter of the nozzle;

d2 ~ diameter of tangential air channels;

η is the number of tangential air channels;

I - nozzle length;

(- distance from the beginning of the nozzle

to the axis of the tangential air channels.

3

762991 4

FIG. 1 shows a general view of the sprayer; in fig. 2 - section AA

in fig. one; in fig. 3 indicates the dimensions of the nozzle and tangential air channels.

The atomizer contains a body 1, a material pipe 2 and a nozzle 3 with a swirling chamber 4 having air tangential 5 connected thereto.

The output end of the material line 2 is blocked by the reflector 6, and the material line 2 communicates with the cavity of the Twisting chamber 4 holes 7.

Air nozzle 8 is screwed into the housing 1, and the nozzle 3 is equipped with a diffuser 9, which allows to obtain a certain taper of the flare.

The dimensions of the nozzle 3 and tangential channels 5 are expressed by the ratios

-4,5

PS "5 SC"

where 8 ^ is the diameter of the nozzle,

SC - the diameter of the tangential

air ducts

η - the number of tangential

air channels, ί - nozzle length, '

С - distance from the beginning of the nozzle

do.oshi tangential air channels.

If - _{η is} less than 8, there is no sufficient supply of powder corresponding to the performance of the sprayer. When the value of this ratio is more than 11 occur technological? the difficulty of performing tangential air ducts.

When the ratio is less than 1.0 Pl more than 1.5, a flare is observed.

The spray works as follows. ... ",. ...............

Compressed air through the nozzle 8 enters the atomizer and, passing through the tangential channels 5, it receives a considerable amount of momentum in the swirling chamber 4, forming a flat vortex, the pressure in which decreases as it approaches the axis, and in the inner part of the vortex, called the core, pressure decreases by parabolic law. At the axial area of the swirl chamber 4, a vacuum is created, due to which material is sucked from the metering hopper (not shown), gets into the swirl chamber 4, is picked up by a swirling flow

| air and transported through the nozzle 3. Thanks to the chamfer at the nozzle exit section 3, the aerosol flow adheres to the inner surface of the diffuser 9, which forms the plume.

5 With this design of the sprayer, the swirling air flow becomes so powerful that it draws and sprays the material without the ejection pump directly from the bunker (0 Pa-feeder, which makes it possible to exclude the ejection pump from the spray installation complex as an unreliable unit).

As a result, the installation is simplified.

⁵ In addition, the alignment of the pumping unit with the spray gun prevents the accumulation of powder in the hose, which occurs when it is bent, and its unexpected release, as it has during the use of an ejection pump. This sprayer provides a torch with completely insignificant fluctuations in powder concentration when the hose is bent, while the quality of the coating improves.

Claims (2)

Claim thirty 35 40 45 50 55 1. An atomizer comprising a housing, a material conduit, and a nozzle with a twisting chamber having tangentially connected air channels to it, which, in order to simplify the design, the output end of the plumbing pipe is plugged with a reflector, while the plumbing pipe communicates with the cavity of the swirling chamber. 2. The sprayer according to π.1, about the t of l and cushing with the fact that the nozzle dimensions and tangentially let down air channels are expressed by the ratios I where 8 ^ is the diameter of the nozzle; 8 ^ - diameter of tangential air channels; p is the number of tangential air channels; B is the nozzle length; C is the distance from the beginning of the nozzle to the axis of the tangential air channels,