MXPA98009199A - Best spray nozzle - Google Patents

Abstract

The spray nozzle comprising a fluid tip, an air plug seated in the fluid tip body, which forms a fluid tip and air cap assembly, as well as an annular passage between the fluid tip and the fluid tip. air. A plurality of tangentially arranged passages are positioned at an angle relative to the exterior of the fluid tip assembly and the air cap. It extends from the outside of the fluid tip assembly and from the air cap to the annular passage and is positioned in the region of the connection between the air cap and the tip for flow.

Description

IMPROVED SPRAY NOZZLE The invention relates to an improved spray nozzle and, more particularly to a round spray, atomized with air. In industries such as ceramics and food processing, for some time there has been a need for a spray equipment capable of producing a round, full-cone spray pattern with a wide diameter. In the past, this need was partially met with either small patterns in the form of a fan or by the use of electrostatic equipment. An object of the present invention is to provide an improved roll nozzle for spraying broad round spray patterns without the need to resort to electrostatic technology. According to the present invention, it is to provide a spray nozzle comprising a fluid tip and an air plug, wherein the plurality of tangential grooves, angled with the outer circumference of the nozzle, are positioned at the interface between the tip for fluid and air cap. Preferably, the tangential grooves are formed in the fluid tip and engage with the cone-shaped face of the air plug. In an alternative construction, the tangential grooves may be formed in an air cap and coupled with the cone-shaped face of the fluid tip. In another embodiment, a construction of a ring-shaped member is interconnected with the fluid tip and the air plug, the tangential grooves are formed at the interface between the ring-shaped member and one of the nozzle members. Conveniently, the tangential grooves are formed in the ring-shaped member. The ring-shaped member, or even the air cap, can be made from a relatively soft material, ie, molded from acetal. The interface between the fluid tip and the air cap can have a cone shape. In the modified construction, the interface, between the fluid tip and the air cap, is formed by spherical and cone-shaped coupling surfaces. The improved nozzle embodiment will now be described, by way of a single example, with reference to the accompanying drawings, in which: Figure 1 is a side elevation of a roll nozzle according to the first embodiment of the present invention; Figure 2 is an end view of a roll nozzle shown in Figure 1, without the air cap; Figure 3 is an axial section taken along line A-A of Figure 1; Figure 4 is a view similar to Figure 1, showing a second embodiment of the invention; and Figure 5 is a view similar to Figure 3, but in which a third embodiment of the invention is shown. The roll nozzle comprises a fluid tip 1 and an air plug 2, which can be placed in any conventional properly threaded spray gun or HVLP (High Volume Low Pressure), (not shown). The interior of this spray head has passages for the flow of atomized air that are clogged by the back face 8 of the tip for fluid 1, and the total flow of air is directed through what would normally be the fan section of air. At an interface between the fluid tip 1 and the air plug 2, the air flow is directed through the tangential grooves 3 at an angle to the outer circumference of the nozzle. The air flow emerges from the grooves 3, as a rotating apex on the inner surface 4 of the air cap 2. These rotating vertices are accelerated towards the outlet of the air cap 5 by reducing the cross-sectional area in the flow pattern of air. On the face of the nozzle 6 the jet of liquid is broken and thrown out by the rotating air jet. The component of the radial air velocity is what produces a round spray pattern with a wide diameter. In the embodiment shown in Figures 1 to 3, the tip for fluid 1 is formed with the tangential grooves 3 and the air plug 2 has a cone in the form of a male 7. However, in the modification of the improved nozzle, shown in Figure 4, the tangential grooves 3 are formed in the air plug 2 and the male cone 9 is formed in the tip for the fluid 1. It is believed that this helps in the production of the nozzle. In the third embodiment of the nozzle, shown in Figure 5, the ring-shaped member 11, whose interface with the fluid tip 1 and the air plug 2 has tangential grooves 3 located on either side of the member In the form of a ring, whose grooves are coupled with a face of soft material in the form of a cone. In the view shown in Figure 5. The tangential grooves 3 are shown coupled with the air cap. The interface member of the three-piece nozzle can be made of a relatively soft, mouldable material, such as acetal. A further modification of the nozzle may consist in replacing the cone-cone-shaped surfaces with cone-shaped or spherical coupling surfaces. In operation, the round spray pattern, atomized with air, may be approximately 8 inches (203 mm) in diameter when the nozzle of the spray gun is held at a distance of 7 to 8 inches (178 to 203 mm) from the Workpiece. Improved nozzle prototypes have spray patterns up to 9 inches (229 mm) in diameter when the nozzle of the spray gun is attached to a spray distance of 12 inches (305 mm) from the workpiece. It will be obvious that with the adjustment of the dimensions of the tangential grooves it will be possible to produce round patterns with a diameter wider than 9 inches (229 iru-u).

Claims (14)

1. A spray nozzle comprising a fluid tip, an air plug seated in the fluid tip body, forming a liquid tip assembly and an air plug, defining an annular passage between the fluid tip and the plug of air, and the mechanisms that define a plurality of passages arranged tangentially, at an angle, to the outside of the assembly of the fluid tip and the air cap, extending from the outside of the assembly with the fluid tip and the air cap to the annular passage and located in the region of connection between the air cap and the fluid tip.

The spray nozzle according to claim 1, wherein the fluid tip comprises a first coupling surface and the air plug comprises a second coupling surface which is joined to the first coupling surface of the tip for fluid and the tangentially arranged passages comprising the open slots formed in the first coupling surface of the fluid tip and then closed by the second coupling surface of the air plug.

The spray nozzle according to claim 1, wherein the fluid tip comprises a first coupling surface and the air plug comprises a second engagement surface with the first coupling surface of the first fluid cap and the arranged passages tangentially comprises the open grooves formed in the second coupling surface of the air cap and closed by the first coupling surface of the fluid tip.

4. The spray nozzle according to claim 1, further comprising a ring-shaped member positioned between the fluid tip and the air cap, and having a first and second coupling surface on the opposite faces of the member in the shape of ring, a third mating surface at the fluid tip is attached to the first mating surface of the ring-shaped member, a fourth mating surface at the air plug is joined to the second mating surface of the ring-shaped member. ring.

5. The spray nozzle according to claim 4, wherein the tangential passages arranged tangentially comprise open grooves formed in one of the first and second mating surface of the member in a ring and are closed by the third and fourth surface tip for fluid or air cap respectively.

6. The spray nozzle according to claim 4, wherein the tangentially arranged passages comprise open grooves in the third mating surface of the fluid tip and are closed by the first mating surface of the ring-shaped member.

7. The spray nozzle according to claim 4, wherein the tangentially arranged passages comprises open slots in the fourth mating surface of the air cap and closed by the second mating surface of the ring-shaped member.

The spray nozzle according to claim 4, wherein the ring-shaped member and / or the air cap comprising a relatively soft material.

9. The spray nozzle according to claim 8, wherein the ring-shaped member and / or the stopper comprises an acetal mold.

10. The spray nozzle according to claim 1, wherein the fluid tip comprises a conical first coupling surface which joins with the first tapered surface tip engagement and fluid passages arranged tangentially comprises open grooves formed in the first coupling surface of the fluid tip and closed by a second conical surface of the air plug.

11. The spray nozzle according to claim 1, wherein the fluid tip comprises a first conical coupling surface and the air cap comprising a second conical engagement surface with the first conical engagement surface of the fluid tip and the tangentially arranged passages comprising the open slots formed in the second conical surface of the air cap and closed by a first conical surface of coupling the tip for fluid.

The spray nozzle according to claim 1, wherein the fluid tip comprises a first conical or spherical coupling surface and the air cap comprising a second coupling surface in the form of a sphere or cone that joins with the first ball-shaped or cone-shaped coupling surface respectively of the fluid tip and the tangentially arranged passages comprising the open slots formed in the ball-shaped or cone-shaped surface of the fluid tip and closed by the second coupling surface in the form of a sphere or cone of the air cap.

13. The spray nozzle according to claim 1, wherein the fluid tip comprises a first conical or spherical coupling surface and the air cap comprising a second coupling surface in the form of a sphere or cone that joins with the first spherical or cone-shaped coupling surface respectively of the fluid tip and the tangentially arranged passages comprising the open slots formed in the second sphere-shaped or cone-shaped surface of the fluid tip and closed by the first sphere-shaped or cone-shaped coupling surface of the air cap. The spray nozzle according to claim 4, wherein the coupling surfaces of the ring-shaped member are conical or ball-shaped to engage the mating surfaces at the fluid tip and air cap that have sphere shape and conical respectively.