HU194750B - Atomizing nozzle for atomizing liquid by pressure - Google Patents

Abstract

Field of the Invention The present invention relates to a liquid jet spray (4) with a spray jet, which has a telescopic spray pattern, with a uniform and fine drip spectrum with a central step channel formed in the spinning body (4). The grass structure consists of two preferred shapes of the central stepped channel (A) from cylindrical holes (8.9 and 8.9a, 9b). -1-

Description

BACKGROUND OF THE INVENTION The present invention relates to a low and medium fluid pressure (1-20 bar overpressure) rotary atomizer nozzle for disintegrating liquid materials into droplets to adjust droplet sizes from 1mm to 80-100 microns in diameter and refined to droplets. even, the scattering image is a cone.

THE . The nozzle of the present invention is suitable for a wide range of applications. As a water spray, it can be advantageously used in fire extinguishers, emergency showers, water curtain systems, because of its fine spraying and even distribution of droplets it provides effective vaccination, detoxification or field separation.

Suitable as a chemical sprayer on agricultural equipment for the even distribution of pesticides, herbicides, liquid fertilizers on the soil and leaves and parts of the plant.

It can be used advantageously in industrial equipment such as sorption apparatus, scrubbers, dust separators, painting and washing equipment, spray dryers, spray granulation towers.

Known fluid pressure nozzles generally provide a cone-shaped spray pattern, i.e., the droplets of liquid jet liquid droplets drop out of the nozzle extend only in the thin layer of the mantle, touching the tip of the nozzle, leaving the interior of the cone empty. This empty cone spray pattern is disadvantageous, except for some exceptional uses. It is understandable, therefore, to have a nozzle nozzle structure that provides telescopic spray pattern.

The telescopic spray fluid pressure nozzle is disclosed in DAS 1502 115, but it reaches the spray cone with a separate insert having transverse guide elements of rather complicated geometry. Nor can this insert be produced by simple mechanical engineering. Other known nozzles are even more complicated, some consisting of 5-6 pieces.

Some solutions achieve a uniform spatial distribution of droplets with a high fluid pressure (40-60 bar) structure. The disadvantages of the prior art solutions are their costly complicated structure and the high energy demand of atomization. A simple solution is known from DE 448 008. This straight-through through hole in the shaft of the already known spinner nozzle sought to solve the problem of telecontaining. However, this nozzle provided an uneven distribution of droplets, and moreover, there was always a smaller or larger ring-shaped, impervious area within the spray cone. This explains that the otherwise simple nozzle has not spread.

It is an object of the present invention to provide a fluid pressure atomizer nozzle which provides a uniformly sprinkled telescopic spray pattern, has a uniform droplet size, has a relatively small atomization power, is relatively small in size, can also be produced by ordinary cutting.

The foregoing objects have been achieved by providing the central nozzle channel of the otherwise known 2-spherical fluid pressure nozzle nozzle with a proportion of hydraulic radius and length of each spigot which respects the need for fine atomization .

We have found that the former is between 1: 1.5 and 1:15, the general is between 1: 3 and 1:12, and the latter is between 1: 1.2 and 1: 6 in the general 1: 2 and 1: 4 to choose from. Preferably, the cylindrical holes form the individual channel steps, wherein the proportions of the hole diameters and lengths are selected as above. Improves the fineness of spraying by making borehole stairs or (with more than two stairs) grooved walls, eg. preferably with a threaded bore.

The spray nozzle of the present invention provides a finely atomized, uniform spray even at relatively low operating pressures (2-5 bar overpressure). For higher fineness requirements, an operating pressure of 10 bar is sufficient (for liquids with a viscosity not significantly higher than that of water).

The spray nozzle according to the invention and its operation will be described with reference to the preferred embodiment shown in the accompanying drawings:

Figure 1 is a sectional view of a nozzle nozzle according to the present invention with an internal threaded connection showing a view of the nozzle body therein.

Figure 2 is a sectional view of a preferred embodiment of the spinner.

Figure 3 is a sectional view of another preferred embodiment.

In Figure 1, the nozzle body (2) is threadedly connected to the connecting tube (1), the spinner body (4) being located in its cylindrical bore (3). The seal of the nozzle is provided by the O-ring (5).

The fluid flow through the connection pipe (1) in the direction indicated by the arrow B is divided into two partial streams arriving at the spinner body (4), one of them enters the threaded channels (10) formed on the periphery of the spinner body. (6) and then into the spray cone (7). The other partial flow passes through the central step channel (A) of the spinner body (4) (see also Fig. 2) where its velocity also absorbs a radial component and then merges in front of the outlet hole (6) of the nozzle body (10). with the part coming from the channels, dropping through the bore (6) and the cone (7) into drops continues the flow of liquid into the spray cone (C), uniformly filling its entire cross-section. The ratio of the two partial currents is determined by the cross-sections and length dimensions of the channel stairs.

The essence of the invention therefore lies in the particular design of the spinner. Referring to Figures 2 and 3, the construction thereof is described.

The spinner body (4) contains perimeter rotating channels (10) known in the art, in the case shown, open channels made of threaded profiles, which can of course also be closed channels made with oblique holes or otherwise. The rotary body (4) is provided with a central step channel (A), preferably formed by successive bores (8) and (9) in descending order of diameters. THE

The two-stage channel shown in Figure 2 is sufficient in most cases.

The embodiments of pörgetőtest in another, particularly preferred greater teljesítmé-2194750 worm and the nozzles in Figure 3. (4) pörgetőtest central channel of larger diameter (8) and the bore (9a), (9b) is smaller transverse cross-section ^one (9a) , (9b). In a further embodiment not shown, the axes of the bores (9a) and (9b) are alternating with respect to each other and to the geometric axis of the spinner.

The grooved design of the channel wall improves the fineness of the spray. The spinner body (4) shown in the preferred embodiment In the wall of the furrows forming the central stepped channel, the single groove forms the leading groove (11).

¹ is apparent from the above description that the invention sze1 Rint fluid pressure spray-nozzle simple structure, which both pieces, the most commonly 'used Ban cutting operations to prepare a small number of step. It is thus not expensive to produce. The complete nozzle consists of only two pieces, so it is easy to handle and install.

The spraying nozzle of the present invention has a low pressure requirement (generally 2-10 bar) relative to the fineness of the atomization and thus has a low specific energy consumption.

The spray pattern of the spray nozzle of the present invention is a filled cone. This feature in itself makes it useful because

- higher specific power than industrial applications, eg. providing a larger contact area in sorption devices, resulting in a smaller device size, in addition to eliminating bypass phenomena inside the device in non-scattered spaces, which degrade the efficiency of sorption processes in spray granulation towers; in spray dryers, they provide better tower volume utilization, and in continuous-action paint washers, workpiece travel speeds and smoother results are achieved by the nozzles of the present invention,

- better utilization of chemicals and higher machine speed than agricultural use,

- in fire extinguishers, emergency showers the extinguishing cone means greater safety for fire extinguishing and decontamination.

The droplet size refinement achieved with the spray nozzle of the present invention further enhances the above-listed benefits, as the specific surface area is further increased. It is very important in the field of firefighting. Creates an opportunity eg. to remove hazardous areas (eg oil pipelines) from the environment with a water spray nozzle instead of the steam curtain used hitherto. The latter, in addition to the risk of scalding accidents, such as the steam curtain, also results in a very high heat dissipation in the event of fire due to rapid evaporation in the large surface water spray.

Of course, only a small proportion of the applications are represented by the examples described above. Likewise, in addition to the preferred embodiment shown, other types of spinneret spray nozzles may be made using the principle of the present invention, which is thus outside the scope of the present invention.

Claims (4)

1. A spinner body liquid spray nozzle having peripheral guide channels, characterized in that the spinner body (4) also has a central step channel (A) on the peripheral guide channels (10) known per se. 30 The spray nozzle according to claim 1, characterized in that the central step channel (A) of its spinner body (4) is formed of cylindrical bores (8,9 and 8, 9a, 9b). The spray nozzle according to claim 1 or 2, 35, characterized in that an open channel or channels are formed on the wall of one or more steps of its central step channel (A). 4. Atomiser nozzle according to any one of claims 1 to 3, characterized in that it is central In the bore or bores of a 40-step channel (A), a thread is formed as an open channel.