WO2010097481A1 - Nozzle for a spray gun with external mixing - Google Patents
Nozzle for a spray gun with external mixing Download PDFInfo
- Publication number
- WO2010097481A1 WO2010097481A1 PCT/ES2009/000100 ES2009000100W WO2010097481A1 WO 2010097481 A1 WO2010097481 A1 WO 2010097481A1 ES 2009000100 W ES2009000100 W ES 2009000100W WO 2010097481 A1 WO2010097481 A1 WO 2010097481A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lugs
- nozzle
- tears
- spray gun
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
- B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
Definitions
- the present invention is a nozzle for spray guns, where the design of the lugs is such that it achieves improvements in the amplitude and homogeneity of the fan, reduces turbulence and rebound and achieves a higher transfer rate.
- the spray guns are based on the atomization or breakage of a fluid flow, generally of paint, in very small particles, obtained by the interaction of this fluid and the compressed air. In all these spray guns the paint and air are conducted by independent circuits until they are mixed at the point of atomization. There are different types of spray guns. Depending for example on the type of mixture, we find external mixing guns, when the mixture of air and fluid is carried out outside the air nozzle, and internal mixing guns, where the mixing occurs in a cavity inside the nozzle before being released into the atmosphere.
- the external mixing nozzles are the most widespread, since they are the ones that achieve the best atomization, allow fan regulation and allow the application of any fluid product.
- spray guns can be classified according to the type of air valve, continuous air with valve or controlled air without valve, or by the type of feed, suction, gravity or pressure.
- the two main units that make up the spray guns are the droplet or peak of the fluid plus the needle, and the spray nozzle.
- the novelty of the invention will focus on the latter.
- a plurality of spray nozzles are known in the state of the art.
- This is the case, for example, of the utility model ES 266759 U, which deals with an improved nozzle for a spray gun, which is constituted of an essentially single-piece revolution element, with an internal stepping of diameters that gives rise to its seat and ring mooring, topping off on two flat surfaces inclined in convergent contrast to a top flat surface flanked by two projections, also called lugs, with a straight trapezoidal shape of inclined faces and located in diametral contraposition.
- the assembly has axially a convergent cylindrical opening along a truncated conical surface towards a flat bottom with a countersunk central mouth for the exit of the air jet and paint, mouth that is flanked by two axial diametrically opposite holes that together with two pairs of inclined holes existing on the facing inclined faces of the projections or lugs, communicated with axial blind holes existing therein, constitute in the same plane symmetrical air outlets that affect the central jet.
- the patent ES 2283238 also deals with a spray gun nozzle that defines a central chamber and a peripheral chamber, whose central chamber has a central mouth and a series of central holes for the air outlet and whose peripheral chamber has a series of peripheral air outlet holes.
- the nozzle also comprises means for controlling the air pressure that reaches the central and peripheral outflow holes, which determine narrowings of the air passage section in the peripheral and central chambers.
- the present invention solves in a fully satisfactory manner the problem set forth above. It is a spray nozzle that does not modify the fluid passage sections or the arrangement of the outlet orifices, but focuses on the external geometry of the lugs of The nozzle It consists in taking advantage of said geometry of the lug to ensure that the contribution of the outside air to the atmospheric pressure, conveniently channeled, which reaches the outlet ducts of the pressurized air of the lugs is as large as possible.
- This additional supply of air allows to modify the physical properties of the air jet that comes out of the holes of the lug, so that it affects the jet of product to be sprayed with a higher flow rate and a lower speed, thus achieving a wider range and homogeneous, lower rebounds and turbulence and a higher transfer rate.
- Figure 1 shows a perspective view of a possible preferred embodiment of the nozzle of the invention.
- Figure 2.- shows a plan view of the nozzle represented in Figure 1.
- Figure 3.- shows a sectional view along the plane A of the nozzle represented in Figures 1 and 2.
- Figure 4 shows a plan view of another preferred embodiment of the nozzle of the invention, represented in perspective in Figure 7.
- Figure 5.- shows a sectional view through the plane C of the nozzle represented in Figure 4.
- Figure 6.- shows a sectional view along the plane D of the nozzle represented in Figure 4.
- Figure 7.- shows a perspective view of the nozzle represented in Figure 4.
- Figure 8 shows a possible preferred embodiment of the tears or pipes in one of the lugs, which includes two rounded tears per lug, arranged at an angle with respect to the output of the fluid flow.
- Figure 9 shows another possible preferred embodiment of the tears in one of the lugs.
- Figure 10.- shows a possible preferred embodiment of the tears of one of the lugs, which includes four tears by two-to-two symmetrical lugs.
- Figure 11.- shows a possible preferred embodiment of the torn ones of one of the lugs, rectangular in shape.
- Figure 12 shows a perspective view of another preferred embodiment of the tears or pipes of the nozzle of the invention, where each lug has a single tear or pipe, with said tears located on the upper face of each lug.
- the present invention relates to a spray gun nozzle.
- the purpose of this is to obtain improvements in the atomization achieved, and its scope covers all those nozzles with the possibility of use in any external spray gun, that is, where the air and the sprayed fluid are mixed outside of The gun
- the central chamber ends in a central outlet hole (2), which houses the outlet of the bushing, fluid peak, where the fluid to be sprayed out.
- pressurized air comes out from the central chamber (1).
- a peripheral chamber (5) that ends in at least one peripheral hole (6-6') for the outlet of the pressurized air supplied by the gun.
- each of the lugs (4, 4 ') has at least one tear or pipe (7, T), located in any part of the outer surface of said lugs (4, 4') , which keeps symmetry with respect to the cutting plane B that symmetrically divides each lug (4, 4 ') into two equal halves, and which in turn keeps symmetry with the tearing of the lug facing with respect to the cutting plane A of symmetry, both planes A and B being cut in the center of the central hole (2) for the outlet of the fluid to be sprayed.
- tear or pipe (7, T) located in any part of the outer surface of said lugs (4, 4') , which keeps symmetry with respect to the cutting plane B that symmetrically divides each lug (4, 4 ') into two equal halves, and which in turn keeps symmetry with the tearing of the lug facing with respect to the cutting plane A of symmetry, both planes A and B being cut in the center of the central hole (2) for the outlet of the fluid to be sprayed.
- said tears or pipes (7, T) favor the channeled drag of the air at atmospheric pressure that surrounds each lug (4, 4 ') towards the holes (6, 6') of pressurized air outlet of the lugs. (4, 4 '), in order to achieve a better atomization of the fluid to be applied, by means of Ia modification of the physical properties of the air jets leaving the lugs (4, 4 ').
- the number of tears or pipes (7, T), their location and dimensions is defined according to the application system, whether suction, pressure or gravity, the characteristics of the fluid to be sprayed, the air pressure and the fluid to be spray, and the application to which it is intended, achieving improvements in the atomization with a wider and more homogeneous range, reduction of rebounds and turbulence, and a higher transfer rate.
- Example 1- Figure 12 shows an example of a preferred embodiment of the tears of the nozzle of the invention.
- An external mixing spray nozzle is observed, with a central orifice (2) for the output of the fluid to be sprayed, as well as holes (3) located around said central orifice (2) that prevent the expansion of the fluid helping to maintain the lugs (4, 4 ') clean.
- the holes (8) help to form the fan to the peripheral holes (6, 6 '), in this case, two per lug, for the exit of the pressurized air.
- the lugs (4, 4 ') are arranged facing each other, keeping symmetry with respect to the two perpendicular cutting planes that would pass through the center of the nozzle, through which the peripheral chamber (5) runs through which supplies the pressurized air.
- the tears or pipes (7, 7 ') have been located in this case in the upper part of each of the lugs (4, 4'), keeping symmetry with respect to the cutting planes A and B perpendicular to each other and passing through the center of the nozzle. In order to channel the air, the section of the tears (7, 7 ') decreases in width and depth as they approach the central hole (2).
- this preferred embodiment is the minimum number of tears arranged on the lugs (4, 4 ') that achieve a better atomization of the fluid to be applied, by modifying the physical properties of the air jets that leave the lugs (4, 4 ').
- Example 2 In Figure 1 we can see another example of preferred embodiment of the tears or pipes (7, 7 ') of the invention.
- the nozzle is the same type as that described in Example 1, so that it comprises a central hole (2) with a plurality of holes (3, 8) arranged around said central hole (2).
- the lugs (4, 4 ') are arranged symmetrically, as in the previous case. In each of them, the peripheral holes (6, 6 ') of the outlet of the pressurized air are arranged.
- a tear or pipe (7, T) symmetrically arranged with respect to the symmetry planes A and B, has been included in each of the lateral faces of the lugs (4, 4 '), so that they are obtained a total of four torn in the nozzle, two for each lug.
- These tears or pipes although they can take any shape, position, angle or dimension, in this case they have been designed with a certain angle of inclination with respect to the perpendicular flow of the outflow fluid.
- the shape of the torn or channeled (7, T) is triangular having a vertex in its outermost part of the lugs (4, 4 ! ), Varying the width of the canalization and widening as it moves towards the inside of the nozzle.
- the inclination of the tears or pipes (7, T) is the same as the peripheral holes (6, 6 ') of the outlet of the pressurized air. Also the depth of the tears (7, T) increases from the outside of the lugs (4, 4 ') towards the inside.
- Example 3 In Figure 8 a preferred embodiment of a part of a nozzle with the tears or pipes (7, T) of the invention is shown. It is a variant of Example 2, where the tears are arranged in the same way on the sides of the lugs (4, 4 '), always symmetrically with respect to the planes A and B of symmetry. Also here the torn or channeling (7, 7 ') are inclined in the same direction as the peripheral holes (6, 6') of the outlet of the pressurized air flow, while its shape is rounded.
- Example 4.- Figure 11 shows another possible preferred embodiment of the invention, showing the shape and arrangement of the torn ones, being another variant of the two previous examples.
- two rips per lug are obtained, symmetrical, and in this case, arranged perpendicularly with respect to the outflow of the fluid to be sprayed.
- the section and depth of the tears is the same along its entire length, and the shape thereof, in this case, is rectangular.
- Example 5 shows another possible preferred embodiment of the invention. It is a nozzle, of the type described above, where in this case, a tear or duct (7, T) has been arranged for each of the peripheral orifices (6, 6 ') of the pressurized air. These torn (7, 7 ') are different in shape, dimensions and depth, although they could have been coincident. In this case the tears (7, 7 ') are inclined, being parallel to the axis of the peripheral holes (6, 6') of the outlet of the pressurized air flow.
- each pair will always have an even and symmetrical number with respect to planes A and B, as defined, being able to position them according to each of the peripheral orifices (6-6 ') of exit.
- the tears (7, T) can be arranged parallel to the axes of the peripheral orifices (6, 6 ') of the air outlet on which they act, or they can be arranged perpendicular to the output of the flow of fluid to be sprayed, but not It limits these configurations, since its arrangement as dimensions and shape depends on the application system (pressure, suction or gravity), characteristics of the fluid to be sprayed, air and fluid pressure, and the application to which it is intended.
- the geometry of the tears or pipes (7-7 '), as well as dimensions and other characteristics, is not limited herein to the figures and preferred embodiments indicated, as long as it complies with the purpose for which they have been designed.
Landscapes
- Nozzles (AREA)
Abstract
Description
BOQUILLA PARA PISTOLA DE PULVERIZACIÓN DE MEZCLA EXTERNA NOZZLE FOR EXTERNAL MIXING SPRAY GUN
DESCRIPCIÓNDESCRIPTION
Boquilla para pistola de pulverización de mezcla externaNozzle for external mixing spray gun
Objeto de Ia invenciónObject of the invention
La presente invención trata de una boquilla para pistolas pulverizadoras, donde el diseño de las orejetas es tal que consigue mejoras en Ia amplitud y homogeneidad del abanico, disminuye las turbulencias y rebotes y consigue una mayor tasa de transferencia.The present invention is a nozzle for spray guns, where the design of the lugs is such that it achieves improvements in the amplitude and homogeneity of the fan, reduces turbulence and rebound and achieves a higher transfer rate.
Dichas ventajas se obtienen dotando a las orejetas de Ia boquilla de unas canalizaciones dispuestas en las caras exteriores, hacia los orificios de salida del aire a presión, modificando Ia propiedades físicas del chorro de salida.Said advantages are obtained by providing the lugs of the nozzle with pipes arranged on the outer faces, towards the outlets of the pressurized air, modifying the physical properties of the outlet jet.
Antecedentes de Ia invenciónBackground of the invention
Las pistolas pulverizadoras se fundamentan en Ia atomización o rotura de un caudal de fluido, generalmente de pintura, en pequeñísimas partículas, obtenidas por Ia interacción de éste fluido y el aire comprimido. En todas estas pistolas pulverizadoras Ia pintura y el aire son conducidos por circuitos independientes hasta que se mezclan en el punto de atomización. Existen diferentes tipos de pistolas pulverizadoras. Dependiendo por ejemplo del tipo de mezcla, encontramos pistolas de mezcla externa, cuando Ia mezcla de aire y fluido se realiza fuera de Ia boquilla de aire, y pistolas de mezcla interna, donde Ia mezcla se produce en una cavidad en el interior de Ia boquilla antes de ser lanzada a Ia atmósfera.The spray guns are based on the atomization or breakage of a fluid flow, generally of paint, in very small particles, obtained by the interaction of this fluid and the compressed air. In all these spray guns the paint and air are conducted by independent circuits until they are mixed at the point of atomization. There are different types of spray guns. Depending for example on the type of mixture, we find external mixing guns, when the mixture of air and fluid is carried out outside the air nozzle, and internal mixing guns, where the mixing occurs in a cavity inside the nozzle before being released into the atmosphere.
Las boquillas de mezcla externa son las más extendidas, pues son las que mejores atomizaciones consiguen, admiten regulación del abanico y permiten Ia aplicación de cualquier producto fluido.The external mixing nozzles are the most widespread, since they are the ones that achieve the best atomization, allow fan regulation and allow the application of any fluid product.
Además de esta clasificación, las pistolas pulverizadoras puede clasificarse según el tipo de válvula de aire, de aire continuo con válvula o de aire controlado sin válvula, o por el tipo de alimentación, de succión, gravedad o presión.In addition to this classification, spray guns can be classified according to the type of air valve, continuous air with valve or controlled air without valve, or by the type of feed, suction, gravity or pressure.
Las dos unidades principales que componen Ia pistolas pulverizadoras son el caequillo o pico del fluido más Ia aguja, y Ia boquilla pulverizadora. Sobre ésta última se va a centrar Ia novedad de Ia invención.The two main units that make up the spray guns are the droplet or peak of the fluid plus the needle, and the spray nozzle. The novelty of the invention will focus on the latter.
Así pues, son conocidas en el estado de Ia técnica una pluralidad de boquillas pulverizadoras. Es el caso por ejemplo del modelo de utilidad ES 266759 U, que trata sobre una boquilla perfeccionada para pistola de pintar, que se constituye de un elemento monopieza esencialmente de revolución, con un escalonamiento interior de diámetros que da origen a su asiento y anillo de amarre, rematándose superiormente en dos superficies planas inclinada en contraposición convergente hacia una superficie plana superior flanqueada por sendos salientes, también llamados orejetas, de forma trapezoidal recta de caras inclinadas y ubicados en contraposición diametral. El conjunto presenta axialmente una abertura cilindrica convergente por una superficie troncocónica hacia un fondo plano con una boca central avellanada para Ia salida del chorro de aire y pintura, boca que se halla flanqueada por sendos axiales taladros diametralmente opuestos que junto con sendas parejas de taladros inclinados existentes sobre las caras inclinadas enfrentadas de los salientes u orejetas, comunicadas con unos taladros ciegos axiales existentes en éstas, constituyen en un mismo plano simétricas salidas para el aire que afectan al chorro central.Thus, a plurality of spray nozzles are known in the state of the art. This is the case, for example, of the utility model ES 266759 U, which deals with an improved nozzle for a spray gun, which is constituted of an essentially single-piece revolution element, with an internal stepping of diameters that gives rise to its seat and ring mooring, topping off on two flat surfaces inclined in convergent contrast to a top flat surface flanked by two projections, also called lugs, with a straight trapezoidal shape of inclined faces and located in diametral contraposition. The assembly has axially a convergent cylindrical opening along a truncated conical surface towards a flat bottom with a countersunk central mouth for the exit of the air jet and paint, mouth that is flanked by two axial diametrically opposite holes that together with two pairs of inclined holes existing on the facing inclined faces of the projections or lugs, communicated with axial blind holes existing therein, constitute in the same plane symmetrical air outlets that affect the central jet.
También Ia patente ES 2283238 trata sobre una boquilla para pistola pulverizadora que define una cámara central y una cámara periférica, cuya cámara central dispone de una boca central y de una serie de orificios centrales para Ia salida de aire y cuya cámara periférica dispone de una serie de orificios periféricos de salida de aire. La boquilla comprende además medios para controlar Ia presión de aire que llega hasta los orificios centrales y periféricos de salida, que determinan estrechamientos de Ia sección de paso de aire en las cámaras periférica y central.The patent ES 2283238 also deals with a spray gun nozzle that defines a central chamber and a peripheral chamber, whose central chamber has a central mouth and a series of central holes for the air outlet and whose peripheral chamber has a series of peripheral air outlet holes. The nozzle also comprises means for controlling the air pressure that reaches the central and peripheral outflow holes, which determine narrowings of the air passage section in the peripheral and central chambers.
El caudal de aire que suministran estas boquillas a través de sus orejetas se regula en el interior de Ia pistola y proviene de una fuente externa a presión mayor que Ia atmosférica. El problema de este tipo de boquillas de mezcla externa radica en su eficacia, pues aunque controlan Ia presión de aire que llega hasta los orificios centrales, no realizan control alguno sobre el aire una vez fuera.The air flow supplied by these nozzles through their lugs is regulated inside the gun and comes from an external source at a pressure greater than atmospheric. The problem with this type of external mixing nozzles lies in its effectiveness, because although they control the air pressure that reaches the central holes, they do not control the air once outside.
Hasta Ia fecha, las mejoras en este tipo de boquillas se centran en Ia distinta disposición de los orificios de salida de Ia pintura, o en las secciones de paso internas de los fluidos, intentando conseguir Ia mayor homogeneidad y amplitud del abanico.Up to date, the improvements in this type of nozzles focus on the different arrangement of the outlets of the paint, or on the internal flow sections of the fluids, trying to achieve greater homogeneity and amplitude of the fan.
Descripción de Ia invenciónDescription of the invention
La presente invención resuelve de forma plenamente satisfactoria Ia problemática anteriormente expuesta. Se trata de una boquilla pulverizadora que no modifica ni las secciones de paso de los fluidos ni Ia disposición de los orificios de salida, sino que se centra en Ia geometría externa de las orejetas de Ia boquilla. Consiste en aprovechar dicha geometría de Ia orejeta para conseguir que el aporte del aire exterior a Ia presión atmosférica, convenientemente canalizado, que llega hasta los conductos de salida del aire presurizado de las orejetas sea el mayor posible.The present invention solves in a fully satisfactory manner the problem set forth above. It is a spray nozzle that does not modify the fluid passage sections or the arrangement of the outlet orifices, but focuses on the external geometry of the lugs of The nozzle It consists in taking advantage of said geometry of the lug to ensure that the contribution of the outside air to the atmospheric pressure, conveniently channeled, which reaches the outlet ducts of the pressurized air of the lugs is as large as possible.
Este aporte adicional de aire permite modificar las propiedades físicas del chorro de aire que sale de los orificios de Ia orejeta, de modo que éste incide sobre el chorro de producto a pulverizar con un mayor caudal y una menor velocidad, logrando así un abanico más amplio y homogéneo, menores rebotes y turbulencias y una mayor tasa de transferencia.This additional supply of air allows to modify the physical properties of the air jet that comes out of the holes of the lug, so that it affects the jet of product to be sprayed with a higher flow rate and a lower speed, thus achieving a wider range and homogeneous, lower rebounds and turbulence and a higher transfer rate.
Se observa en las Figuras 8, 9, 10, 11 y 12 algunas posibles realizaciones preferentes de las orejetas de Ia boquilla de Ia invención. Se trata de incluir unos rasgados o canalizaciones dispuestas en las caras externas de las orejetas, bien sea lateral o superiormente, dispuestas simétricamente en las mismas, y pudiendo incluir otros rasgados que ayudan del mismo modo en Ia optimización de Ia pulverización, mediante el direccionamiento del aire circundante a presión atmosférica hacia los orificios de las orejetas. El diseño de dichos rasgados o canalizaciones, ángulos, dimensiones, etc., depende del sistema de aplicación (presión, succión o gravedad), características del fluido a pulverizar, presión del aire y del fluido, y Ia aplicación a Ia que va destinada. De este modo, los rasgados o canalizaciones representados en las Figuras únicamente constituyen un ejemplo práctico, pudiendo adoptar cualquier otra geometría que favorezca el arrastre canalizado del aire circundante hacia los orificios de salida del aire de las orejetas con Ia finalidad de mejorar de forma significativa Ia amplitud y homogeneidad del abanico, disminuir el número de rebotes y turbulencias y aumentar Ia tasa de transferencia. Descripción de los dibujosIt is observed in Figures 8, 9, 10, 11 and 12 some possible preferred embodiments of the lugs of the nozzle of the invention. It is about including torn or channeling arranged on the outer faces of the lugs, either laterally or superiorly, arranged symmetrically in them, and being able to include other tears that help in the same way in the optimization of the spraying, by means of addressing the surrounding air at atmospheric pressure towards the holes of the lugs. The design of said tears or pipes, angles, dimensions, etc., depends on the application system (pressure, suction or gravity), characteristics of the fluid to be sprayed, air and fluid pressure, and the application to which it is intended. Thus, the tears or pipes represented in the Figures only constitute a practical example, being able to adopt any other geometry that favors the channeling of the surrounding air into the air outlet holes of the lugs in order to significantly improve the amplitude and homogeneity of the fan, decrease the number of bounces and turbulence and increase the transfer rate. Description of the drawings
Para completar Ia descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las características del invento, de acuerdo con un ejemplo preferente de Ia realización práctica del mismo, se acompaña como parte integrante de dicha descripción, un juego de dibujos en donde con carácter ilustrativo y no limitativo, se ha representado Io siguiente:To complete the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of the practical implementation thereof, a set of drawings is accompanied as an integral part of said description. where, as an illustration and not limitation, the following has been represented:
La Figura 1.- muestra una vista en perspectiva de una posible realización preferente de Ia boquilla de Ia invención.Figure 1 shows a perspective view of a possible preferred embodiment of the nozzle of the invention.
La Figura 2.- muestra una vista en planta de Ia boquilla representada en Ia Figura 1.Figure 2.- shows a plan view of the nozzle represented in Figure 1.
La Figura 3.- muestra una vista de corte por el plano A de Ia boquilla representada en las Figuras 1 y 2.Figure 3.- shows a sectional view along the plane A of the nozzle represented in Figures 1 and 2.
La Figura 4.- muestra una vista en planta de otra realización preferente de Ia boquilla de Ia invención, representada en perspectiva en Ia Figura 7.Figure 4 shows a plan view of another preferred embodiment of the nozzle of the invention, represented in perspective in Figure 7.
La Figura 5.- muestra una vista de corte por el plano C de Ia boquilla representada en Ia Figura 4.Figure 5.- shows a sectional view through the plane C of the nozzle represented in Figure 4.
La Figura 6.- muestra una vista de corte por el plano D de Ia boquilla representada en Ia Figura 4.Figure 6.- shows a sectional view along the plane D of the nozzle represented in Figure 4.
La Figura 7.- muestra una vista en perspectiva de Ia boquilla representada en Ia Figura 4. La Figura 8.- muestra una posible realización preferente de los rasgados o canalizaciones en una de las orejetas, que incluye dos rasgados de forma redondeada por orejeta, dispuestos en ángulo respecto a Ia salida del flujo de fluido.Figure 7.- shows a perspective view of the nozzle represented in Figure 4. Figure 8 shows a possible preferred embodiment of the tears or pipes in one of the lugs, which includes two rounded tears per lug, arranged at an angle with respect to the output of the fluid flow.
La Figura 9.- muestra otra posible realización preferente de los rasgados en una de las orejetas.Figure 9 shows another possible preferred embodiment of the tears in one of the lugs.
La Figura 10.- muestra una posible realización preferente de los rasgados de una de las orejetas, que incluye cuatro rasgados por orejeta simétricos dos a dos.Figure 10.- shows a possible preferred embodiment of the tears of one of the lugs, which includes four tears by two-to-two symmetrical lugs.
La Figura 11.- muestra una posible realización preferente de ios rasgados de una de las orejetas, de forma rectangular.Figure 11.- shows a possible preferred embodiment of the torn ones of one of the lugs, rectangular in shape.
La Figura 12.- muestra una vista en perspectiva de otra realización preferente de los rasgados o canalizaciones de Ia boquilla de Ia invención, donde cada orejeta dispone de un único rasgado o canalización, con dichos rasgados situados en Ia cara superior de cada orejeta.Figure 12 shows a perspective view of another preferred embodiment of the tears or pipes of the nozzle of the invention, where each lug has a single tear or pipe, with said tears located on the upper face of each lug.
Realización preferente de Ia invenciónPreferred embodiment of the invention
La presente invención trata de una boquilla para pistola de pulverización. El objeto de Ia misma consiste en obtener mejoras en Ia atomización conseguida, y su ámbito de aplicación abarca todas aquellas boquillas con posibilidad de utilización en cualquier pistola de pulverización extema, es decir, donde el aire y el fluido pulverizado se mezclan en el exterior de Ia pistola.The present invention relates to a spray gun nozzle. The purpose of this is to obtain improvements in the atomization achieved, and its scope covers all those nozzles with the possibility of use in any external spray gun, that is, where the air and the sprayed fluid are mixed outside of The gun
Se trata de una boquilla para pistola de pulverización de mezcla externa, del tipo de las que dispone de una cámara central (1) y una cámara periférica (5). La cámara central termina en un orificio central (2) de salida, que alberga Ia salida del casquillo, pico de fluido, por donde sale el fluido a pulverizar. Por Ia corona circular formada por dicho orificio central (2) y por el casquillo o pico de fluido sale aire a presión procedente de Ia cámara central (1). Así mismo, dispone de unos orificios (3) localizados alrededor del orificio central (2) que impiden Ia expansión de Ia masa del fluido que sale del orifico central (2) y ayudan a mantener limpias las orejetas (4, 4'); pudiendo disponer de otros orificios (8) situados más externamente que los orificios centrales (3) respecto del orifico central (2) cuya misión es ayudar a los orificios (6-6') localizados en las orejetas (4, 4') a Ia formación del abanico.This is a nozzle for an external mixing spray gun, the type of which has a central chamber (1) and a peripheral chamber (5). The central chamber ends in a central outlet hole (2), which houses the outlet of the bushing, fluid peak, where the fluid to be sprayed out. By means of the circular crown formed by said central hole (2) and by the bushing or peak of fluid, pressurized air comes out from the central chamber (1). Likewise, it has holes (3) located around the central hole (2) that prevent the expansion of the mass of the fluid leaving the central hole (2) and help keep the lugs (4, 4 ') clean; being able to have other holes (8) located more externally than the central holes (3) with respect to the central hole (2) whose mission is to help the holes (6-6 ') located in the lugs (4, 4') to the fan formation.
En los laterales de Ia boquilla, y guardando simetría respecto a un plano (B) perpendicular al orificio central (2) de salida del fluido pulverizado, que pasa por el centro de dicho orificio central (2), se disponen un par de orejetas (4, 4'), iguales entre sí. Por el interior de dichas orejetas (4, 4') discurre una cámara periférica (5) que termina en, al menos, un orificio periférico (6-6') para Ia salida del aire a presión suministrado por Ia pistola.On the sides of the nozzle, and keeping symmetry with respect to a plane (B) perpendicular to the central orifice (2) of the pulverized fluid outlet, which passes through the center of said central orifice (2), a pair of lugs ( 4, 4 '), equal to each other. Inside said lugs (4, 4 ') runs a peripheral chamber (5) that ends in at least one peripheral hole (6-6') for the outlet of the pressurized air supplied by the gun.
La geometría de cada una de las orejetas (4, 4') es tal que dispone de, al menos, un rasgado o canalización (7, T), localizado en cualquier parte de Ia superficie externa de dichas orejetas (4, 4'), que guarda simetría respecto al plano de corte B que divide simétricamente cada orejeta (4, 4') en dos mitades ¡guales, y que a su vez guarda simetría con el rasgado de Ia orejeta enfrentada respecto al plano de corte A de simetría, cortándose ambos planos A y B en el centro del orificio central (2) de salida del fluido a pulverizar.The geometry of each of the lugs (4, 4 ') is such that it has at least one tear or pipe (7, T), located in any part of the outer surface of said lugs (4, 4') , which keeps symmetry with respect to the cutting plane B that symmetrically divides each lug (4, 4 ') into two equal halves, and which in turn keeps symmetry with the tearing of the lug facing with respect to the cutting plane A of symmetry, both planes A and B being cut in the center of the central hole (2) for the outlet of the fluid to be sprayed.
De este modo, dichos rasgados o canalizaciones (7, T) favorecen el arrastre canalizado del aire a presión atmosférica que circunda a cada orejeta (4, 4') hacia los orificios (6, 6') de salida de aire presurizado de las orejetas (4, 4'), con el fin de lograr una mejor atomización del fluido a aplicar, mediante Ia modificación de las propiedades físicas de los chorros de aire que salen de las orejetas (4, 4').In this way, said tears or pipes (7, T) favor the channeled drag of the air at atmospheric pressure that surrounds each lug (4, 4 ') towards the holes (6, 6') of pressurized air outlet of the lugs. (4, 4 '), in order to achieve a better atomization of the fluid to be applied, by means of Ia modification of the physical properties of the air jets leaving the lugs (4, 4 ').
El número de rasgados o canalizaciones (7, T), su localización y dimensiones viene definido en función del sistema de aplicación, bien sea succión, presión o gravedad, de las características del fluido a pulverizar, de Ia presión de aire y del fluido a pulverizar, y de Ia aplicación a Ia que vaya destina, consiguiendo mejoras en Ia atomización con un abanico más amplio y homogéneo, reducción de rebotes y turbulencias, y una mayor tasa de transferencia.The number of tears or pipes (7, T), their location and dimensions is defined according to the application system, whether suction, pressure or gravity, the characteristics of the fluid to be sprayed, the air pressure and the fluid to be spray, and the application to which it is intended, achieving improvements in the atomization with a wider and more homogeneous range, reduction of rebounds and turbulence, and a higher transfer rate.
Ejemplo 1.- En Ia Figura 12 se ha representado un ejemplo de realización preferente de los rasgados de Ia boquilla de Ia invención. Se observa un boquilla de pulverización de mezcla externa, con un orificio central (2) de salida del fluido a pulverizar, así como unos orificios (3) localizados alrededor de dicho orificio central (2) que impiden Ia expansión del fluido ayudando a mantener las orejetas (4, 4') limpias. Los orificios (8) ayudan a Ia formación del abanico a los orificios periféricos (6, 6'), en este caso, dos por orejeta, para Ia salida del aire a presión. Las orejetas (4, 4') se disponen enfrentadas, guardando simetría respecto a los dos planos de corte perpendiculares que pasarían por el centro de Ia boquilla, por cuyo interior discurre Ia cámara periférica (5) por Ia que suministra el aire a presión. Los rasgados o canalizaciones (7, 7') se han localizado en este caso en Ia parte superior de cada una de las orejetas (4, 4'), guardando simetría respecto a los planos de corte A y B perpendiculares entre sí y que pasan por el centro de Ia boquilla. Para lograr canalizar el aire, Ia sección de los rasgados (7, 7') disminuye en anchura y profundidad conforme se acercan al orifico central (2).Example 1.- Figure 12 shows an example of a preferred embodiment of the tears of the nozzle of the invention. An external mixing spray nozzle is observed, with a central orifice (2) for the output of the fluid to be sprayed, as well as holes (3) located around said central orifice (2) that prevent the expansion of the fluid helping to maintain the lugs (4, 4 ') clean. The holes (8) help to form the fan to the peripheral holes (6, 6 '), in this case, two per lug, for the exit of the pressurized air. The lugs (4, 4 ') are arranged facing each other, keeping symmetry with respect to the two perpendicular cutting planes that would pass through the center of the nozzle, through which the peripheral chamber (5) runs through which supplies the pressurized air. The tears or pipes (7, 7 ') have been located in this case in the upper part of each of the lugs (4, 4'), keeping symmetry with respect to the cutting planes A and B perpendicular to each other and passing through the center of the nozzle. In order to channel the air, the section of the tears (7, 7 ') decreases in width and depth as they approach the central hole (2).
De este modo, este ejemplo de realización preferente es el de número mínimo de rasgados dispuestos sobre las orejetas (4, 4') que consiguen una mejor atomización del fluido a aplicar, mediante Ia modificación de las propiedades físicas de los chorros de aire que salen de las orejetas (4, 4').Thus, this preferred embodiment is the minimum number of tears arranged on the lugs (4, 4 ') that achieve a better atomization of the fluid to be applied, by modifying the physical properties of the air jets that leave the lugs (4, 4 ').
Ejemplo 2.- En Ia Figura 1 podemos observar otro ejemplo de realización preferente de los rasgados o canalizaciones (7, 7') de Ia invención. La boquilla es del mismo tipo que Ia descrita en el Ejemplo 1 , de manera que comprende un orificio central (2) con una pluralidad de orificios (3, 8) dispuestos alrededor de dicho orificio central (2). Las orejetas (4, 4') se disponen de manera enfrentada, simétricamente, al igual que en el caso anterior. En cada una de ellas, se disponen los orificios periféricos (6, 6') de salida del aire a presión. En esta realización, se ha incluido en cada una de las caras laterales de las orejetas (4, 4') un rasgado o canalización (7, T), dispuestos simétricamente respecto a los planos A y B de simetría, de manera que se obtienen un total de cuatro rasgados en Ia boquilla, dos por cada orejeta. Estos rasgados o canalizaciones, si bien pueden tomar cualquier forma, posición, ángulo o dimensión, en este caso se han diseñado con un ángulo de inclinación determinado respecto a Ia perpendicular del flujo de fluido de salida. La forma de los rasgados o canalizaciones (7, T) es triangular disponiendo de un vértice en su parte más externa de las orejetas (4, 4!), variando Ia anchura de Ia canalización y ensanchándose a medida que avanza hacia el interior de Ia boquilla. La inclinación de los rasgados o canalizaciones (7, T) es Ia misma que los orificios periféricos (6, 6') de salida del aire a presión. También Ia profundidad de los rasgados (7, T) aumenta desde el exterior de Ia orejetas (4, 4') hacia el interior.Example 2.- In Figure 1 we can see another example of preferred embodiment of the tears or pipes (7, 7 ') of the invention. The nozzle is the same type as that described in Example 1, so that it comprises a central hole (2) with a plurality of holes (3, 8) arranged around said central hole (2). The lugs (4, 4 ') are arranged symmetrically, as in the previous case. In each of them, the peripheral holes (6, 6 ') of the outlet of the pressurized air are arranged. In this embodiment, a tear or pipe (7, T), symmetrically arranged with respect to the symmetry planes A and B, has been included in each of the lateral faces of the lugs (4, 4 '), so that they are obtained a total of four torn in the nozzle, two for each lug. These tears or pipes, although they can take any shape, position, angle or dimension, in this case they have been designed with a certain angle of inclination with respect to the perpendicular flow of the outflow fluid. The shape of the torn or channeled (7, T) is triangular having a vertex in its outermost part of the lugs (4, 4 ! ), Varying the width of the canalization and widening as it moves towards the inside of the nozzle. The inclination of the tears or pipes (7, T) is the same as the peripheral holes (6, 6 ') of the outlet of the pressurized air. Also the depth of the tears (7, T) increases from the outside of the lugs (4, 4 ') towards the inside.
Ejemplo 3.- En Ia Figura 8 se muestra una realización preferente de una parte de una boquilla con los rasgados o canalizaciones (7, T) de Ia invención. Es una variante del Ejemplo 2, donde los rasgados se disponen del mismo modo en los laterales de las orejetas (4, 4'), siempre simétricamente respecto a los planos A y B de simetría. También aquí los rasgados o canalizaciones (7, 7') se encuentran inclinados en ia misma dirección que los orificios periféricos (6, 6') de salida del flujo de aire a presión, mientras que su forma es redondeada.Example 3.- In Figure 8 a preferred embodiment of a part of a nozzle with the tears or pipes (7, T) of the invention is shown. It is a variant of Example 2, where the tears are arranged in the same way on the sides of the lugs (4, 4 '), always symmetrically with respect to the planes A and B of symmetry. Also here the torn or channeling (7, 7 ') are inclined in the same direction as the peripheral holes (6, 6') of the outlet of the pressurized air flow, while its shape is rounded.
Ejemplo 4.- La Figura 11 muestra otra posible realización preferente de Ia invención, donde se muestra Ia forma y disposición de los rasgados, siendo otra variante de los dos ejemplos anteriores. De este modo, se obtienen dos rasgados por orejeta, simétricos, y en este caso, dispuestos perpendicularmente respecto al flujo de salida del fluido a pulverizar. La sección y profundidad de los rasgados es Ia misma a Io largo de toda su longitud, y Ia forma de los mismos, en este caso, es rectangular.Example 4.- Figure 11 shows another possible preferred embodiment of the invention, showing the shape and arrangement of the torn ones, being another variant of the two previous examples. In this way, two rips per lug are obtained, symmetrical, and in this case, arranged perpendicularly with respect to the outflow of the fluid to be sprayed. The section and depth of the tears is the same along its entire length, and the shape thereof, in this case, is rectangular.
Ejemplo 5.- La Figura 10 muestra otra posible realización preferente de Ia invención. Se trata de una boquilla, del tipo de las descritas anteriormente, donde en este caso, se ha dispuesto un rasgado o canalización (7, T) por cada uno de los orificios periféricos (6, 6') del aire a presión. Dichos rasgados (7, 7') son diferentes en forma, dimensiones y profundidad, aunque pudieran haber sido coincidentes. En este caso los rasgados (7, 7') están inclinados, quedando paralelos al eje de los orificios periféricos (6, 6') de salida del flujo de aire a presión.Example 5.- Figure 10 shows another possible preferred embodiment of the invention. It is a nozzle, of the type described above, where in this case, a tear or duct (7, T) has been arranged for each of the peripheral orifices (6, 6 ') of the pressurized air. These torn (7, 7 ') are different in shape, dimensions and depth, although they could have been coincident. In this case the tears (7, 7 ') are inclined, being parallel to the axis of the peripheral holes (6, 6') of the outlet of the pressurized air flow.
Como se ha visto en los ejemplos, puede colocarse más de un rasgado o canalización (7, T) en cada orejeta (4, 4'). En este caso, en cada boquilla siempre se dispondrá un número par y simétricos respecto a los planos A y B, tal y como se ha definido, pudiendo posicionarlos de acuerdo a cada uno de los orificios periféricos (6-6') de salida. Los rasgados (7, T) pueden disponerse paralelos respecto a los ejes de los orificios periféricos (6, 6') de salida del aire sobre los que actúan, o pueden disponerse perpendiculares a Ia salida del flujo de fluido a pulverizar, pero no se limita a estas configuraciones, pues tato su disposición como dimensiones y forma depende del sistema de aplicación (presión, succión o gravedad), características del fluido a pulverizar, presión del aire y del fluido, y Ia aplicación a Ia que va destinada.As seen in the examples, more than one tear or pipe (7, T) can be placed in each lug (4, 4 '). In this case, each pair will always have an even and symmetrical number with respect to planes A and B, as defined, being able to position them according to each of the peripheral orifices (6-6 ') of exit. The tears (7, T) can be arranged parallel to the axes of the peripheral orifices (6, 6 ') of the air outlet on which they act, or they can be arranged perpendicular to the output of the flow of fluid to be sprayed, but not It limits these configurations, since its arrangement as dimensions and shape depends on the application system (pressure, suction or gravity), characteristics of the fluid to be sprayed, air and fluid pressure, and the application to which it is intended.
De acuerdo a Ia descripción realizada, Ia geometría de los rasgados o canalizaciones (7-7'), así como dimensiones y demás características, no se ve limitada en Ia presente memoria a las figuras y realizaciones preferentes indicadas, siempre y cuando cumpla con Ia finalidad para Ia que se han diseñado. According to the description made, the geometry of the tears or pipes (7-7 '), as well as dimensions and other characteristics, is not limited herein to the figures and preferred embodiments indicated, as long as it complies with the purpose for which they have been designed.
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES201190048A ES2384934B1 (en) | 2009-02-25 | 2009-02-25 | NOZZLE FOR EXTERNAL MIXING SPRAY GUN. |
| PCT/ES2009/000100 WO2010097481A1 (en) | 2009-02-25 | 2009-02-25 | Nozzle for a spray gun with external mixing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/ES2009/000100 WO2010097481A1 (en) | 2009-02-25 | 2009-02-25 | Nozzle for a spray gun with external mixing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2010097481A1 true WO2010097481A1 (en) | 2010-09-02 |
Family
ID=42665032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/ES2009/000100 Ceased WO2010097481A1 (en) | 2009-02-25 | 2009-02-25 | Nozzle for a spray gun with external mixing |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES2384934B1 (en) |
| WO (1) | WO2010097481A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1751787A (en) * | 1924-11-10 | 1930-03-25 | Binks Mfg Co | Flat spraying appliance |
| GB1136577A (en) * | 1966-03-23 | 1968-12-11 | Don Dee Winegar | Spray gun air cap |
| US20060016909A1 (en) * | 2004-07-23 | 2006-01-26 | Chia Chung Enterprises Co., Ltd. | Spray gun head |
| US20060186223A1 (en) * | 2004-04-13 | 2006-08-24 | Hsing-Tzu Wang | Paint spray gun |
-
2009
- 2009-02-25 ES ES201190048A patent/ES2384934B1/en active Active
- 2009-02-25 WO PCT/ES2009/000100 patent/WO2010097481A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1751787A (en) * | 1924-11-10 | 1930-03-25 | Binks Mfg Co | Flat spraying appliance |
| GB1136577A (en) * | 1966-03-23 | 1968-12-11 | Don Dee Winegar | Spray gun air cap |
| US20060186223A1 (en) * | 2004-04-13 | 2006-08-24 | Hsing-Tzu Wang | Paint spray gun |
| US20060016909A1 (en) * | 2004-07-23 | 2006-01-26 | Chia Chung Enterprises Co., Ltd. | Spray gun head |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2384934B1 (en) | 2013-05-16 |
| ES2384934A1 (en) | 2012-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2017355100B2 (en) | Microstructured nozzle | |
| US9216426B2 (en) | Solid cone nozzle | |
| EP2703089B1 (en) | Spray gun | |
| WO2003066231A1 (en) | Device for the production of capillary jets and micro- and nanometric particles | |
| KR101079206B1 (en) | Swirl generation device for a nozzle | |
| US4480793A (en) | Liquid distribution device | |
| RU2647104C2 (en) | Finely divided liquid sprayer | |
| KR20190010653A (en) | Swirl flow forming body and suction device | |
| RU2615256C1 (en) | Fine-dispersed liquid sprayer | |
| CA2796352A1 (en) | External mix air assisted spray nozzle assembly | |
| RU2560291C1 (en) | Kochetov's pneumatic atomiser | |
| ES2953954T3 (en) | Low Drift Flat Jet Spray Nozzle | |
| US7243861B2 (en) | Spray nozzle | |
| US10086387B2 (en) | Selectable arc and range of coverage spray nozzle assembly with multiple fluidic fan spray nozzles | |
| JP6404204B2 (en) | Nebulizer | |
| ES2897528T3 (en) | Device for projecting a treatment fluid and spraying system for a treatment fluid comprising at least one device of this type | |
| WO2010097481A1 (en) | Nozzle for a spray gun with external mixing | |
| RU2530790C1 (en) | Kochetov's air-blast atomizer | |
| ES2699358T3 (en) | Injection device, in particular, for injecting a cargo of hydrocarbons in a refining unit | |
| US11453016B2 (en) | Stacked pre-orifices for sprayer nozzles | |
| ES2907048T3 (en) | spray nozzle | |
| WO2017021561A1 (en) | Rotating sprinkler with adjustable speed of rotation | |
| RU2593109C1 (en) | Fluid sprayer | |
| US11872583B2 (en) | Counterflow mixer and atomizer | |
| HK1209080A1 (en) | Vortex spray generation systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09840677 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: P201190048 Country of ref document: ES |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 09840677 Country of ref document: EP Kind code of ref document: A1 |