EP2952261B1 - Solid-cone spray nozzle - Google Patents

Solid-cone spray nozzle Download PDF

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Publication number
EP2952261B1
EP2952261B1 EP15170680.1A EP15170680A EP2952261B1 EP 2952261 B1 EP2952261 B1 EP 2952261B1 EP 15170680 A EP15170680 A EP 15170680A EP 2952261 B1 EP2952261 B1 EP 2952261B1
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EP
European Patent Office
Prior art keywords
fluid
stirring chamber
spray nozzle
chamber
orifice
Prior art date
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Active
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EP15170680.1A
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German (de)
French (fr)
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EP2952261A1 (en
Inventor
Hervé FOUBERT
Bruno Renault
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Solcera SAS
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Solcera SAS
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Priority to PL15170680T priority Critical patent/PL2952261T3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
    • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
    • B05B1/3421—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber
    • B05B1/3426—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels emerging in the swirl chamber perpendicularly to the outlet axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
    • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
    • B05B1/3478—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet the liquid flowing at least two different courses before reaching the swirl chamber

Definitions

  • the invention relates to a spray nozzle.
  • a spray nozzle is externally like a case having an inlet port and an outlet port. Inside, the nozzle body is arranged to allow the dispersion of a liquid in the form of droplets, and to form at the outlet a jet of droplets, or spray, which has a determined distribution in space. Such nozzles are for example used in the agricultural field for spraying crop protection products on crops.
  • nozzles There are different types of nozzles according to the particular shape of their jet: nozzles called straight jet, flat jet, cone jet, which can be a hollow cone, or a solid cone.
  • the present invention is concerned with spray nozzles of the cone jet type, in particular in solid cone.
  • the nozzle comprises a body forming a holster and which comprises one or more organs and / or elements designed to disturb the jet, that is to say act on the flow of liquid and to modify the characteristics before ejection by the outlet, depending on the desired spray and the shape of the desired exit jet.
  • the nozzle body comprises a cylindrical generally cylindrical agitation chamber having a central outlet port in direct communication with the nozzle outlet.
  • the flow of liquid In order to be able to produce a conical jet, the flow of liquid must be rotated upstream of the outlet orifice so as to generate a vortex.
  • the rotation of the liquid flow is obtained by introducing fluid inside the stirring chamber in a direction having a substantially tangential component relative to a peripheral wall of said stirring chamber.
  • whirl nozzle or "swirl nozzle”
  • tangential whirl nozzles tangential whirl
  • the fact that the jet is in solid cone, or in hollow cone mainly depends on the pressure profile inside the stirring chamber.
  • fluid is introduced into the chamber through one or more oblique side channels oriented in a direction substantially tangential to the periphery of said agitation chamber and substantially perpendicular to the exit direction of the chamber. jet.
  • the fluid circulates essentially at the periphery of the chamber, which gives a hollow cone jet.
  • fluid is also introduced in a substantially axial direction towards the center of the chamber, for example by means of a longitudinal channel which enters the chamber through a closure piece located on the upstream side of the chamber. said chamber.
  • the invention improves the spray performance of such nozzles.
  • the proposed spray nozzle comprises a body which has an inlet port and an outlet port, and which has, on the inlet port side, a fluid inlet area, which feeds a stirring chamber.
  • a body which has an inlet port and an outlet port, and which has, on the inlet port side, a fluid inlet area, which feeds a stirring chamber.
  • which has a substantially cylindrical peripheral wall, with an upstream wall and a downstream wall, the downstream wall having an adjacent ejection port and in direct fluid communication with the outlet of the nozzle, the outlet having a cross-section substantially frustoconical and the ejection orifice having a substantially cylindrical section and a flared portion on the side of the outlet orifice the upstream wall being traversed by at least one fluid inlet channel which opens in an axial direction in the chamber agitating with respect to said peripheral wall, and the peripheral wall being traversed by at least one other fluid inlet channel, which opens into said stirring chamber; n in a tangential direction, said spray nozzle.
  • the proposed spray nozzle is characterized in that the upstream wall comprises at least one blind cavity arranged at a distance from said axial inlet channel and open on a face facing towards the inside of the chamber, and in that the cavity is a peripheral groove encircling said channel and having a V-shaped cross-section.
  • This effect is particularly remarkable in the case of a row of nozzles forming for example a spray boom.
  • the cavity comprises a groove.
  • the throat is peripheral.
  • the throat may be annular.
  • the groove has a V-shaped cross section.
  • the upstream wall of the stirring chamber is defined, at least partially, by a closing part of said chamber.
  • the stirring chamber (which may also be called turbulence chamber) can thus be performed (in particular by machining) in the form of a chamber which is open on the upstream side.
  • the axial channel, as well as the cavity or cavities, can be made in this closing piece. For the final assembly of the nozzle, simply mount the closure piece on the stirring chamber.
  • the closure piece can integrate other walls if necessary, including the peripheral wall and the side channels.
  • the Figures 1 to 5 show a full cone spray nozzle.
  • the nozzle 1 comprises a body 2 forming a casing housing a stirring chamber 3, with its closure piece 4, an insert 5 and a peripheral seal 6 intended to ensure a seal between the insert 5 and the body 2.
  • the body 2 is of substantially cylindrical shape and comprises a peripheral wall 20 defining an interior space for housing the components of the nozzle 1.
  • the body 2 may be made, for example, of plastic.
  • the body 2 has an inlet orifice 21 intended to be connected to a supply of fluid to be sprayed, and an outlet orifice 22 intended for evacuation of the fluid in the form of a jet or spray in a solid cone.
  • the body 2 has, on the side of the inlet orifice 21, a peripheral rim 23 intended to serve as a support for the insert 5.
  • outlet port 22 On the outlet port 22 side, said outlet port 22 has a substantially frustoconical section.
  • the outlet orifice 12 also has a diameter smaller than the internal diameter of the body 2 so as to form an internal radial abutment 24.
  • the body 2 receives a stirring chamber 3.
  • the stirring chamber 3 is a hollow part of substantially cylindrical shape and comprises a downstream wall 31 having an ejection orifice 30, of substantially circular cross section, and a substantially circular peripheral wall 32. According to the embodiment shown, the stirring chamber 3 does not include an upstream wall. The closing of the stirring chamber 3 upstream side is performed by a closure piece 4, which will be described infra.
  • the peripheral wall 32 of the stirring chamber 3 defines a substantially cylindrical interior space. This internal space of the stirring chamber communicates with the ejection orifice 30 via an anterior portion of frustoconical section 35.
  • the anterior portion of frustoconical section 35 makes it possible to obtain the acceleration of the speed of rotation. ejection by concentrating the fluid towards the orifice 30.
  • the ejection orifice 30 has a substantially cylindrical section and a flared portion on the side of the outlet orifice 22 of the nozzle 1.
  • the stirring chamber 3 comprises an anterior portion oriented towards the outlet orifice 22 of the nozzle 1, having an outer diameter substantially equal to the internal diameter of the body 2.
  • the stirring chamber 3 also comprises a rear portion having an outer diameter smaller than the inside diameter of the body 2 to provide a circulation space between said body 2 and said stirring chamber 3.
  • the width of the circulation space is adapted to the fluid to be sprayed and the flow rate of said fluid to through the nozzle 1.
  • the peripheral wall comprises two lateral openings 33 through, in this case substantially longitudinal slots.
  • the lateral openings 33 are diametrically opposed and made so as to open into the stirring chamber 3 in a direction substantially tangential to the peripheral wall 32 or slightly inclined relative to said peripheral wall 32, inner side.
  • the stirring chamber 3 is disposed inside the body 2, its anterior portion coming against the inner radial abutment 24 of said body 2.
  • the ejection orifice 30 of the stirring chamber 3 is adjacent and in direct communication with the outlet port 22 of the body 2.
  • a closure piece 4 is then inserted inside the body 2 following the stirring chamber 3, said closure piece 4 closes the interior space.
  • the closure piece 4 has a substantially cylindrical shape and is an upstream wall of the stirring chamber 3.
  • the closing piece 4 is designed to have a through axial central channel 41 opening inside the stirring chamber 3 in a face 42 oriented towards the inside of said stirring chamber 3.
  • the face 42 has a cavity 43 arranged at a distance from said axial inlet channel 41.
  • the cavity 43 is a peripheral annular groove encircling the channel 41.
  • the cavity 43 has a V-shaped cross section.
  • the closing piece 4 has an anterior part, oriented towards the stirring chamber 3, having a diameter substantially equal to that of the rear portion of said stirring chamber 3.
  • the closing piece 4 is disposed at a distance from the wall 20 of the body 2 and, like the rear portion of the stirring chamber 3, provides a peripheral circulation space for the fluid to be sprayed.
  • the closure piece 4 also has a rear portion, oriented towards the inlet orifice 21 of the body 2 and having a reduced diameter, smaller than that of its anterior part. This back part is intended to engage with the insert 5 described infra which ensures the maintenance.
  • the insert 5 intended to ensure the maintenance of the stirring chamber 3 and the closure piece 4 in position and to close the case formed by the body 2.
  • the insert 5 is put in place and held by screwing and has for this purpose a threaded portion located near the flange 51 and designed to cooperate with a corresponding thread (not visible) of the body 2.
  • the insert 5 also constitutes a fluid inlet zone supplying the stirring chamber 3.
  • the insert 5 is a hollow part in a generally cylindrical shape having a flange 51 intended to bear against the peripheral flange 23 of the body 2.
  • the insert 5 extends inside the body 2 by a cylindrical extension 53 open at both ends.
  • the cylindrical extension 53 is intended to engage with the rear portion 42 of the closure piece 4 by interlocking.
  • the outer diameter of the cylindrical extension 53 is smaller than the internal diameter of the body 2 so as to provide a peripheral circulation space of the fluid.
  • Peripheral lateral openings 55 are formed in the cylindrical extension 53 in the vicinity of the end intended to come into engagement with the closure piece 4.
  • These lateral openings 55 are intended to allow a portion of the fluid to be sprayed to reach the peripheral circulation space.
  • the circulation of the fluid through the nozzle 1 is as follows.
  • a fluid supply to spray is connected to the nozzle 1.
  • the fluid enters the nozzle 1 through the orifice 21 of the body 2. More particularly, the fluid enters the nozzle through the insert 5.
  • the fluid passes through the insert 5 until, on the one hand, the lateral openings 55 are reached, and on the other hand, the channel 41 of the closure piece 4.
  • a first part of the fluid to be sprayed passes through the openings 55 and reaches the peripheral circulation space which extends to the stirring chamber 3 after passing along the closure piece 4.
  • the first part of the fluid is thus animated by a swirling motion.
  • a second part of the fluid to be sprayed passes axially through the insert to join the closure part 4 and its channel 41.
  • the second part of the fluid passes through said channel 41 to reach the stirring chamber 3 inside which said channel 41 opens.
  • the second part of the fluid thus joins the first part of said fluid substantially in the center of the vortex.
  • said fluid In addition to the vortex movement of which the fluid is animated inside the chamber, said fluid also comes into contact with the face 42 and its cavity 43.
  • the circulation of the fluid in the cavity 43 creates additional disturbances in the flow. said fluid, which promotes its atomization.
  • the first part of the fluid is then ejected through the orifice 30 of the stirring chamber 3, then passes through the outlet orifice 22 of the body 2 to exit the nozzle 1 in a conical configuration.
  • the cavity is a groove or a peripheral annular groove.
  • the cavity may be a punch.
  • the upstream wall of the stirring chamber may have several cavities.
  • the cavities may be distributed peripherally or partially peripherally.
  • the cavities can also be arranged concentrically.

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Description

L'invention concerne une buse de pulvérisation.The invention relates to a spray nozzle.

Une buse de pulvérisation se présente extérieurement comme un étui présentant un orifice d'entrée et un orifice de sortie. A l'intérieur, le corps de buse est agencé pour permettre la dispersion d'un liquide sous forme de gouttelettes, et pour former en sortie un jet de gouttelettes, ou spray, qui possède une distribution déterminée dans l'espace. De telles buses sont par exemple utilisées dans le domaine agricole pour pulvériser des produits phytosanitaires sur des cultures.A spray nozzle is externally like a case having an inlet port and an outlet port. Inside, the nozzle body is arranged to allow the dispersion of a liquid in the form of droplets, and to form at the outlet a jet of droplets, or spray, which has a determined distribution in space. Such nozzles are for example used in the agricultural field for spraying crop protection products on crops.

On distingue différents types de buses selon la forme particulière de leur jet : buses dites à jet droit, à jet plat, à jet en cône, qui peut être un cône creux, ou encore un cône plein.There are different types of nozzles according to the particular shape of their jet: nozzles called straight jet, flat jet, cone jet, which can be a hollow cone, or a solid cone.

La présente invention s'intéresse aux buses de pulvérisation du type à jet en cône, en particulier en cône plein.The present invention is concerned with spray nozzles of the cone jet type, in particular in solid cone.

La buse comprend un corps formant un étui et qui comporte un ou plusieurs organes et/ou éléments conçus pour perturber le jet, c'est-à-dire agir sur le flux de liquide et pour en modifier les caractéristiques avant son éjection par l'orifice de sortie, en fonction de la pulvérisation souhaitée et de la forme du jet de sortie voulue.The nozzle comprises a body forming a holster and which comprises one or more organs and / or elements designed to disturb the jet, that is to say act on the flow of liquid and to modify the characteristics before ejection by the outlet, depending on the desired spray and the shape of the desired exit jet.

Le corps de buse comprend une chambre d'agitation de forme générale cylindrique présentant un orifice de sortie central en communication directe avec l'orifice de sortie de la buse. Afin de pouvoir produire un jet conique, il convient d'imprimer au flux de liquide un mouvement de rotation en amont de l'orifice de sortie, de manière à générer un tourbillon. La rotation du flux de liquide est obtenue en introduisant du fluide à l'intérieur de la chambre d'agitation selon une direction possédant une composante essentiellement tangentielle par rapport à une paroi périphérique de ladite chambre d'agitation.The nozzle body comprises a cylindrical generally cylindrical agitation chamber having a central outlet port in direct communication with the nozzle outlet. In order to be able to produce a conical jet, the flow of liquid must be rotated upstream of the outlet orifice so as to generate a vortex. The rotation of the liquid flow is obtained by introducing fluid inside the stirring chamber in a direction having a substantially tangential component relative to a peripheral wall of said stirring chamber.

Il existe plusieurs types de buses de pulvérisation à cône plein. On peut par exemple citer, les buses à tourbillon axial (« whirl nozzle » ou « swirl nozzle ») et les buses à tourbillon tangentiel (« tangential whirl »).There are several types of solid cone spray nozzles. For example, there can be mentioned, the axial swirl nozzles ("whirl nozzle" or "swirl nozzle") and tangential whirl nozzles ("tangential whirl").

Les documents DE 71 453 C , US 3 275 248 et US 4 570 860 décrivent des exemples de buses de pulvérisation à cône plein de type à tourbillon axial. Dans ces buses, le mouvement de rotation du fluide est obtenu grâce à un insert d'agitation venant fermer la chambre d'agitation en amont de l'orifice de sortie et comprenant un ensemble de canaux sensiblement hélicoïdaux permettant de guider le flux de liquide et de le dévier pour l'injecter dans la chambre selon la direction souhaitée.The documents DE 71 453 C , US 3,275,248 and US 4,570,860 describe examples of axial swirl type solid cone spray nozzles. In these nozzles, the rotational movement of the fluid is obtained by means of a stirring insert closing the stirring chamber upstream of the orifice outlet and comprising a set of substantially helical channels for guiding the flow of liquid and diverting it to inject it into the chamber in the desired direction.

Le fait que le jet soit en cône plein, ou bien en cône creux dépend principalement du profil de pression à l'intérieur de la chambre d'agitation.The fact that the jet is in solid cone, or in hollow cone mainly depends on the pressure profile inside the stirring chamber.

A côté de cela, un exemple de buse à tourbillon tangentiel est décrit dans le document FR 2 522 537 .In addition to this, an example of a tangential vortex nozzle is described in the document FR 2,522,537 .

Dans les buses à tourbillon tangentiel, du fluide est introduit à l'intérieur de la chambre à travers un ou plusieurs canaux latéraux obliques orientés selon une direction sensiblement tangentielle à la périphérie de ladite chambre d'agitation et sensiblement perpendiculaire à la direction de sortie du jet.In the tangential vortex nozzles, fluid is introduced into the chamber through one or more oblique side channels oriented in a direction substantially tangential to the periphery of said agitation chamber and substantially perpendicular to the exit direction of the chamber. jet.

Dans ce cas, le fluide circule essentiellement à la périphérie de la chambre, ce qui donne un jet en cône creux.In this case, the fluid circulates essentially at the periphery of the chamber, which gives a hollow cone jet.

Pour accéder au jet en cône plein, on introduit aussi du fluide selon une direction sensiblement axiale vers le centre de la chambre, par exemple au moyen d'un canal longitudinal qui entre dans la chambre en traversant une pièce de fermeture située du côté amont de ladite chambre.To access the solid cone jet, fluid is also introduced in a substantially axial direction towards the center of the chamber, for example by means of a longitudinal channel which enters the chamber through a closure piece located on the upstream side of the chamber. said chamber.

Il y a donc une première partie du fluide qui circule en périphérie, et une seconde partie du fluide qui passe au centre. Ces deux parties de fluide ne sont pas soumises aux mêmes forces d'atomisation. Un problème de cette configuration est que la dispersion du fluide au centre du cône n'est pas homogène avec la dispersion du fluide à la périphérie du cône. Plus généralement, il s'ensuit d'importantes variations dans la distribution du fluide dans une section droite du jet.There is therefore a first part of the fluid which circulates in the periphery, and a second part of the fluid which passes in the center. These two fluid parts are not subjected to the same atomization forces. A problem of this configuration is that the dispersion of the fluid at the center of the cone is not homogeneous with the dispersion of the fluid at the periphery of the cone. More generally, large variations in the distribution of the fluid in a cross section of the jet follow.

L'invention vient améliorer les performances de pulvérisation de telles buses.The invention improves the spray performance of such nozzles.

La buse de pulvérisation proposée comprend un corps qui possède un orifice d'entrée et un orifice de sortie, et qui présente, du côté de l'orifice d'entrée, une zone d'entrée de fluide, laquelle alimente une chambre d'agitation qui possède une paroi périphérique sensiblement cylindrique, avec une paroi amont et une paroi aval, la paroi aval possédant un orifice d'éjection adjacent et en communication fluidique directe avec l'orifice de sortie de la buse, l'orifice de sortie possédant une section sensiblement tronconique et l'orifice d'éjection présentant une section essentiellement cylindrique et une partie évasée du côté de l'orifice de sortie la paroi amont étant traversée par au moins un canal d'entrée de fluide qui débouche selon une direction axiale dans la chambre d'agitation par rapport à ladite paroi périphérique, et la paroi périphérique étant traversée par au moins un autre canal d'entrée de fluide, qui débouche dans ladite chambre d'agitation selon une direction tangentielle, ladite buse de pulvérisation.The proposed spray nozzle comprises a body which has an inlet port and an outlet port, and which has, on the inlet port side, a fluid inlet area, which feeds a stirring chamber. which has a substantially cylindrical peripheral wall, with an upstream wall and a downstream wall, the downstream wall having an adjacent ejection port and in direct fluid communication with the outlet of the nozzle, the outlet having a cross-section substantially frustoconical and the ejection orifice having a substantially cylindrical section and a flared portion on the side of the outlet orifice the upstream wall being traversed by at least one fluid inlet channel which opens in an axial direction in the chamber agitating with respect to said peripheral wall, and the peripheral wall being traversed by at least one other fluid inlet channel, which opens into said stirring chamber; n in a tangential direction, said spray nozzle.

La buse de pulvérisation proposée est caractérisée en ce que la paroi amont comprend au moins une cavité borgne ménagée à distance dudit canal d'entrée axial et ouverte sur une face orientée vers l'intérieur de la chambre, et en ce que la cavité est une gorge périphérique encerclant ledit canal et présentant une section droite en V.The proposed spray nozzle is characterized in that the upstream wall comprises at least one blind cavity arranged at a distance from said axial inlet channel and open on a face facing towards the inside of the chamber, and in that the cavity is a peripheral groove encircling said channel and having a V-shaped cross-section.

Cette présence de cavités à l'intérieur de la chambre d'agitation provoque des perturbations additionnelles dans le fluide, qui permettent d'obtenir une atomisation améliorée du fluide au niveau du cœur du jet conique. On obtient par là une distribution plus homogène du fluide à l'intérieur du jet.This presence of cavities inside the stirring chamber causes additional disturbances in the fluid, which make it possible to obtain an improved atomization of the fluid at the level of the conical jet core. This results in a more homogeneous distribution of the fluid inside the jet.

Cet effet est particulièrement remarquable dans le cas d'une rangée de buses formant par exemple une rampe de pulvérisation.This effect is particularly remarkable in the case of a row of nozzles forming for example a spray boom.

Sans vouloir se borner à la théorie, on pense que le fait de ménager la ou les cavités à distance du canal d'entrée axial permet d'assurer que le fluide circulant à travers ledit canal pénètre d'abord à l'intérieur de la chambre d'agitation. Le fluide qui pénètre dans les cavités est par conséquent bien le fluide circulant dans la chambre, et non le fluide alimentant la chambre mais n'ayant pas encore pénétré ladite chambre.Without wishing to be bound by theory, it is thought that keeping the cavity or cavities at a distance from the axial inlet channel makes it possible to ensure that the fluid flowing through said channel first enters the interior of the chamber. stirring. The fluid that enters the cavities is therefore the fluid flowing in the chamber, and not the fluid supplying the chamber but not yet penetrated said chamber.

De plus, la buse proposée conserve une constitution extrêmement compacte.In addition, the proposed nozzle maintains an extremely compact constitution.

La cavité comprend une gorge.The cavity comprises a groove.

La gorge est périphérique.The throat is peripheral.

La gorge peut être annulaire.The throat may be annular.

Enfin, la gorge présente une section droite en V.Finally, the groove has a V-shaped cross section.

Selon un mode de réalisation particulier, la paroi amont de la chambre d'agitation est définie, au moins partiellement, par une pièce de fermeture de ladite chambre. Une telle configuration présente de nombreux avantages pour la fabrication de la buse. La chambre d'agitation (que l'on peut appeler aussi chambre de turbulence) peut ainsi être réalisée (notamment par usinage) sous la forme d'une chambre qui est ouverte côté amont. Le canal axial, ainsi que la ou les cavités, peuvent être réalisés dans cette pièce de fermeture. Pour l'assemblage final de la buse, il suffit de monter la pièce de fermeture sur la chambre d'agitation.According to a particular embodiment, the upstream wall of the stirring chamber is defined, at least partially, by a closing part of said chamber. Such a configuration has many advantages for the manufacture of the nozzle. The stirring chamber (which may also be called turbulence chamber) can thus be performed (in particular by machining) in the form of a chamber which is open on the upstream side. The axial channel, as well as the cavity or cavities, can be made in this closing piece. For the final assembly of the nozzle, simply mount the closure piece on the stirring chamber.

La pièce de fermeture peut intégrer d'autres parois le cas échéant, notamment la paroi périphérique et les canaux latéraux.The closure piece can integrate other walls if necessary, including the peripheral wall and the side channels.

D'autres caractéristiques et avantages de l'invention apparaîtront à l'examen de la description détaillée ci-après, et des dessins annexés, sur lesquels :

  • La figure 1 est une vue schématique en perspective avant d'une buse de pulvérisation à cône plein telle que proposée.
  • La figure 2 est une vue schématique en perspective arrière de la buse de la figure 1.
  • La figure 3 est une représentation schématique en coupe longitudinale axiale de la buse des figures 1 et 2.
  • La figure 4 est une représentation schématique en coupe longitudinale axiale de la buse des figures 1 et 2, prise à 90° par rapport à la vue de la figure 3.
  • La figure 5 est une représentation schématique éclatée de la buse des figures 1 et 2 en perspective arrière.
  • La figure 6 est une représentation schématique éclatée de la buse des figures 1 et 2 en perspective avant.
Other features and advantages of the invention will appear on examining the detailed description below, and the attached drawings, in which:
  • The figure 1 is a schematic perspective view before a solid cone spray nozzle as proposed.
  • The figure 2 is a schematic view in rear perspective of the nozzle of the figure 1 .
  • The figure 3 is a schematic representation in axial longitudinal section of the nozzle of Figures 1 and 2 .
  • The figure 4 is a schematic representation in axial longitudinal section of the nozzle of Figures 1 and 2 , taken at 90 ° to the view of the figure 3 .
  • The figure 5 is an exploded schematic representation of the nozzle of the Figures 1 and 2 in rear perspective.
  • The figure 6 is an exploded schematic representation of the nozzle of the Figures 1 and 2 in perspective before.

Les dessins et la description ci-après contiennent, pour l'essentiel, des éléments à caractère certain. Les dessins font partie intégrante de la description et pourront donc non seulement servir à mieux faire comprendre la présente invention, mais aussi contribuer à sa définition, le cas échéant.The drawings and the description below contain, for the most part, certain elements. The drawings are an integral part of the description and can therefore not only serve to better understand the present invention, but also contribute to its definition, if any.

Les figures 1 à 5 montrent une buse de pulvérisation à cône plein.The Figures 1 to 5 show a full cone spray nozzle.

La buse 1 comprend un corps 2 formant un étui abritant une chambre d'agitation 3, avec sa pièce de fermeture 4, un insert 5 et un joint 6 périphérique visant à assurer une étanchéité entre l'insert 5 et le corps 2.The nozzle 1 comprises a body 2 forming a casing housing a stirring chamber 3, with its closure piece 4, an insert 5 and a peripheral seal 6 intended to ensure a seal between the insert 5 and the body 2.

Le corps 2 est de forme sensiblement cylindrique et comprend une paroi périphérique 20 délimitant un espace intérieur destiné à loger les composants de la buse 1. Le corps 2 pourra être réalisé, par exemple, en matière plastique.The body 2 is of substantially cylindrical shape and comprises a peripheral wall 20 defining an interior space for housing the components of the nozzle 1. The body 2 may be made, for example, of plastic.

Le corps 2 présente un orifice d'entrée 21 destiné à être relié à une alimentation en fluide à pulvériser, et un orifice de sortie 22 destiné à l'évacuation du fluide sous forme de jet ou spray en cône plein.The body 2 has an inlet orifice 21 intended to be connected to a supply of fluid to be sprayed, and an outlet orifice 22 intended for evacuation of the fluid in the form of a jet or spray in a solid cone.

Le corps 2 présente, du côté de l'orifice d'entrée 21, un rebord périphérique 23 destiné à servir d'appui à l'insert 5.The body 2 has, on the side of the inlet orifice 21, a peripheral rim 23 intended to serve as a support for the insert 5.

Du côté de l'orifice de sortie 22, ledit orifice de sortie 22 possède une section sensiblement tronconique. L'orifice de sortie 12 possède en outre un diamètre inférieur au diamètre interne du corps 2 de manière à former une butée radiale interne 24.On the outlet port 22 side, said outlet port 22 has a substantially frustoconical section. The outlet orifice 12 also has a diameter smaller than the internal diameter of the body 2 so as to form an internal radial abutment 24.

Comme indiqué précédemment, le corps 2 reçoit une chambre d'agitation 3.As indicated above, the body 2 receives a stirring chamber 3.

La chambre d'agitation 3 est une pièce creuse de forme sensiblement cylindrique et comprend une paroi aval 31 présentant un orifice d'éjection 30, de section transversale sensiblement circulaire, et une paroi périphérique 32 sensiblement circulaire. Selon le mode de réalisation représenté, la chambre d'agitation 3 n'intègre pas de paroi amont. La fermeture de la chambre d'agitation 3 côté amont est réalisée par une pièce de fermeture 4, qui sera décrite infra.The stirring chamber 3 is a hollow part of substantially cylindrical shape and comprises a downstream wall 31 having an ejection orifice 30, of substantially circular cross section, and a substantially circular peripheral wall 32. According to the embodiment shown, the stirring chamber 3 does not include an upstream wall. The closing of the stirring chamber 3 upstream side is performed by a closure piece 4, which will be described infra.

La paroi périphérique 32 de la chambre d'agitation 3 définit un espace intérieur sensiblement cylindrique. Cet espace intérieur de la chambre d'agitation communique avec l'orifice d'éjection 30 par l'intermédiaire d'une partie antérieure de section tronconique 35. La partie antérieure de section tronconique 35 permet d'obtenir l'accélération de la vitesse d'éjection en concentrant le fluide vers l'orifice 30.The peripheral wall 32 of the stirring chamber 3 defines a substantially cylindrical interior space. This internal space of the stirring chamber communicates with the ejection orifice 30 via an anterior portion of frustoconical section 35. The anterior portion of frustoconical section 35 makes it possible to obtain the acceleration of the speed of rotation. ejection by concentrating the fluid towards the orifice 30.

En outre, l'orifice d'éjection 30 présente une section essentiellement cylindrique et une partie évasée du côté de l'orifice de sortie 22 de la buse 1.In addition, the ejection orifice 30 has a substantially cylindrical section and a flared portion on the side of the outlet orifice 22 of the nozzle 1.

Par ailleurs, la chambre d'agitation 3 comprend une portion antérieure orientée vers l'orifice de sortie 22 de la buse 1, présentant un diamètre externe sensiblement égal au diamètre intérieur du corps 2. La chambre d'agitation 3 comprend également une portion arrière présentant un diamètre externe inférieur au diamètre intérieur du corps 2 afin de ménager un espace de circulation entre ledit corps 2 et ladite chambre d'agitation 3. La largeur de l'espace de circulation est adaptée au fluide à pulvériser et au débit dudit fluide à travers la buse 1.Furthermore, the stirring chamber 3 comprises an anterior portion oriented towards the outlet orifice 22 of the nozzle 1, having an outer diameter substantially equal to the internal diameter of the body 2. The stirring chamber 3 also comprises a rear portion having an outer diameter smaller than the inside diameter of the body 2 to provide a circulation space between said body 2 and said stirring chamber 3. The width of the circulation space is adapted to the fluid to be sprayed and the flow rate of said fluid to through the nozzle 1.

Dans ladite portion arrière de la chambre d'agitation 3, la paroi périphérique comprend deux ouvertures latérales 33 traversantes, en l'espèce des fentes sensiblement longitudinales. Les ouvertures latérales 33 sont diamétralement opposées et réalisées de manière à déboucher dans la chambre d'agitation 3 selon une direction essentiellement tangentielle à la paroi périphérique 32 ou faiblement inclinée par rapport à ladite paroi périphérique 32, côté intérieur.In said rear portion of the stirring chamber 3, the peripheral wall comprises two lateral openings 33 through, in this case substantially longitudinal slots. The lateral openings 33 are diametrically opposed and made so as to open into the stirring chamber 3 in a direction substantially tangential to the peripheral wall 32 or slightly inclined relative to said peripheral wall 32, inner side.

La chambre d'agitation 3 est disposée à l'intérieur du corps 2, sa portion antérieure venant contre la butée radiale interne 24 dudit corps 2. L'orifice d'éjection 30 de la chambre d'agitation 3 est adjacent et en communication directe avec l'orifice de sortie 22 du corps 2.The stirring chamber 3 is disposed inside the body 2, its anterior portion coming against the inner radial abutment 24 of said body 2. The ejection orifice 30 of the stirring chamber 3 is adjacent and in direct communication with the outlet port 22 of the body 2.

Une pièce de fermeture 4 est ensuite insérée à l'intérieur du corps 2 à la suite de la chambre d'agitation 3 dont ladite pièce de fermeture 4 vient fermer l'espace intérieur.A closure piece 4 is then inserted inside the body 2 following the stirring chamber 3, said closure piece 4 closes the interior space.

La pièce de fermeture 4 présente une forme sensiblement cylindrique et vient constituer une paroi amont de la chambre d'agitation 3.The closure piece 4 has a substantially cylindrical shape and is an upstream wall of the stirring chamber 3.

La pièce de fermeture 4 est conçue de manière à présenter un canal 41 central axial traversant débouchant à l'intérieur de la chambre d'agitation 3 dans une face 42 orientée vers l'intérieur de ladite chambre d'agitation 3.The closing piece 4 is designed to have a through axial central channel 41 opening inside the stirring chamber 3 in a face 42 oriented towards the inside of said stirring chamber 3.

En plus du canal 41 y débouchant, la face 42 présente une cavité 43 ménagée à distance dudit canal d'entrée axial 41.In addition to the channel 41 opening therefrom, the face 42 has a cavity 43 arranged at a distance from said axial inlet channel 41.

Par à distance, on entend qu'il existe un espace plein, non en communication fluide, entre le canal 41 et la cavité 43. Ledit canal 41 et ladite cavité 43 ne sont pas en communication fluide directement l'un avec l'autre au sein de la pièce de fermeture 4 et pour atteindre la cavité 43, le fluide doit préalablement circuler dans la chambre d'agitation 3.By remote means that there is a solid space, not in fluid communication, between the channel 41 and the cavity 43. Said channel 41 and said cavity 43 are not in fluid communication directly with each other at the within the closure piece 4 and to reach the cavity 43, the fluid must first circulate in the stirring chamber 3.

Selon le mode de réalisation représenté, la cavité 43 est une gorge annulaire périphérique encerclant le canal 41. La cavité 43 présente une section droite en V.According to the embodiment shown, the cavity 43 is a peripheral annular groove encircling the channel 41. The cavity 43 has a V-shaped cross section.

La pièce de fermeture 4 possède une partie antérieure, orientée vers la chambre d'agitation 3, possédant un diamètre sensiblement égal à celui de la portion arrière de ladite chambre d'agitation 3.The closing piece 4 has an anterior part, oriented towards the stirring chamber 3, having a diameter substantially equal to that of the rear portion of said stirring chamber 3.

Ainsi, la pièce de fermeture 4 est disposée à distance de la paroi 20 du corps 2 et, comme la portion arrière de la chambre d'agitation 3, ménage un espace de circulation périphérique pour le fluide à pulvériser.Thus, the closing piece 4 is disposed at a distance from the wall 20 of the body 2 and, like the rear portion of the stirring chamber 3, provides a peripheral circulation space for the fluid to be sprayed.

La pièce de fermeture 4 possède également une partie arrière, orientée vers l'orifice d'entrée 21 du corps 2 et possédant un diamètre réduit, inférieur à celui de sa partie antérieure. Cette partie arrière est destinée à venir en prise avec l'insert 5 décrit infra qui en assure le maintien.The closure piece 4 also has a rear portion, oriented towards the inlet orifice 21 of the body 2 and having a reduced diameter, smaller than that of its anterior part. This back part is intended to engage with the insert 5 described infra which ensures the maintenance.

Vient ensuite à l'intérieur du corps 2, l'insert 5 destiné à assurer la le maintien de la chambre d'agitation 3 et de la pièce de fermeture 4 en position et à fermer l'étui formé par le corps 2.Then comes inside the body 2, the insert 5 intended to ensure the maintenance of the stirring chamber 3 and the closure piece 4 in position and to close the case formed by the body 2.

L'insert 5 est mis en place et maintenu par vissage et possède pour ce faire une portion filetée située à proximité de la collerette 51 et conçue pour coopérer avec un taraudage correspondant (non visible) du corps 2.The insert 5 is put in place and held by screwing and has for this purpose a threaded portion located near the flange 51 and designed to cooperate with a corresponding thread (not visible) of the body 2.

L'insert 5 constitue également une zone d'entrée de fluide alimentant la chambre d'agitation 3.The insert 5 also constitutes a fluid inlet zone supplying the stirring chamber 3.

L'insert 5 est une pièce creuse se présentant sous une forme générale cylindrique présentant une collerette 51 destinée à venir en appui contre le rebord périphérique 23 du corps 2.The insert 5 is a hollow part in a generally cylindrical shape having a flange 51 intended to bear against the peripheral flange 23 of the body 2.

Un joint périphérique 6 disposé à la périphérie extérieure de l'insert 3, vient assurer l'étanchéité entre l'insert 5 et le corps 2 à proximité de l'orifice d'entrée 21 dudit corps 2.A peripheral seal 6 disposed at the outer periphery of the insert 3, ensures sealing between the insert 5 and the body 2 near the inlet orifice 21 of said body 2.

L'insert 5 s'étend à l'intérieur du corps 2 par un prolongement cylindrique 53 ouvert à ses deux extrémités.The insert 5 extends inside the body 2 by a cylindrical extension 53 open at both ends.

Le prolongement cylindrique 53 est destiné à venir en prise avec la partie arrière 42 de la pièce de fermeture 4 par emboîtement.The cylindrical extension 53 is intended to engage with the rear portion 42 of the closure piece 4 by interlocking.

Comme précédemment, le diamètre extérieur du prolongement cylindrique 53 est inférieur au diamètre interne du corps 2 de manière à ménager un espace de circulation périphérique du fluide. Des ouvertures 55 latérales périphériques sont ménagées dans le prolongement cylindrique 53 au voisinage de l'extrémité destinée à venir en prise avec la pièce de fermeture 4.As before, the outer diameter of the cylindrical extension 53 is smaller than the internal diameter of the body 2 so as to provide a peripheral circulation space of the fluid. Peripheral lateral openings 55 are formed in the cylindrical extension 53 in the vicinity of the end intended to come into engagement with the closure piece 4.

Ces ouvertures latérales 55 sont destinées à permettre à une partie du fluide à pulvériser de rejoindre l'espace de circulation périphérique.These lateral openings 55 are intended to allow a portion of the fluid to be sprayed to reach the peripheral circulation space.

La circulation du fluide à travers la buse 1 est la suivante.The circulation of the fluid through the nozzle 1 is as follows.

Une alimentation en fluide à pulvériser est raccordée à la buse 1. Le fluide pénètre dans la buse 1 par l'orifice 21 du corps 2. Plus particulièrement, le fluide pénètre dans la buse par l'insert 5.A fluid supply to spray is connected to the nozzle 1. The fluid enters the nozzle 1 through the orifice 21 of the body 2. More particularly, the fluid enters the nozzle through the insert 5.

Le fluide traverse l'insert 5 jusqu'à atteindre, d'une part, les ouvertures latérales 55, et d'autre part, le canal 41 de la pièce de fermeture 4.The fluid passes through the insert 5 until, on the one hand, the lateral openings 55 are reached, and on the other hand, the channel 41 of the closure piece 4.

Une première partie du fluide à pulvériser traverse les ouvertures 55 et atteint l'espace de circulation périphérique qui s'étend jusqu'à la chambre d'agitation 3 après avoir longé la pièce de fermeture 4.A first part of the fluid to be sprayed passes through the openings 55 and reaches the peripheral circulation space which extends to the stirring chamber 3 after passing along the closure piece 4.

Lorsque la première partie du fluide atteint la chambre d'agitation 3, ladite partie de fluide traverse les ouvertures 33 tangentielles et pénètre à l'intérieur de ladite chambre d'agitation 3 selon l'angle souhaité.When the first part of the fluid reaches the stirring chamber 3, said fluid part passes through the tangential openings 33 and penetrates inside said stirring chamber 3 according to the desired angle.

La première partie du fluide est ainsi animée d'un mouvement tourbillonnant.The first part of the fluid is thus animated by a swirling motion.

Une deuxième partie du fluide à pulvériser traverse axialement l'insert pour rejoindre la pièce de fermeture 4 et son canal 41.A second part of the fluid to be sprayed passes axially through the insert to join the closure part 4 and its channel 41.

La deuxième partie du fluide traverse le dit canal 41 pour atteindre la pièce d'agitation 3 à l'intérieur de laquelle débouche ledit canal 41.The second part of the fluid passes through said channel 41 to reach the stirring chamber 3 inside which said channel 41 opens.

La deuxième partie du fluide rejoint ainsi la première partie dudit fluide sensiblement au centre du tourbillon.The second part of the fluid thus joins the first part of said fluid substantially in the center of the vortex.

Outre le mouvement de tourbillon dont le fluide est animé à l'intérieur de la chambre, ledit fluide entre également en contact avec la face 42 et sa cavité 43. La circulation du fluide dans la cavité 43 vient créer des perturbations additionnelles dans l'écoulement dudit fluide, ce qui favorise son atomisation.In addition to the vortex movement of which the fluid is animated inside the chamber, said fluid also comes into contact with the face 42 and its cavity 43. The circulation of the fluid in the cavity 43 creates additional disturbances in the flow. said fluid, which promotes its atomization.

La première partie du fluide est ensuite éjectée à travers l'orifice 30 de la chambre d'agitation 3, puis traverse l'orifice de sortie 22 du corps 2 pour sortir de la buse 1 selon une configuration en cône plein.The first part of the fluid is then ejected through the orifice 30 of the stirring chamber 3, then passes through the outlet orifice 22 of the body 2 to exit the nozzle 1 in a conical configuration.

Bien que l'invention ait été décrite avec des exemples particuliers de réalisation, elle n'y est nullement limitée et comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons qui sont couverts par la portée des revendication annexées.Although the invention has been described with particular embodiments, it is in no way limited and includes all the technical equivalents of the described means and their combinations which are covered by the scope of the appended claims.

Comme déjà décrit, la cavité est une gorge ou une rainure annulaire périphérique.As already described, the cavity is a groove or a peripheral annular groove.

Alternativement, la cavité peut être un poinçon.Alternatively, the cavity may be a punch.

En outre, la paroi amont de la chambre d'agitation peut présenter plusieurs cavités. Les cavités peuvent être réparties de manière périphérique ou partiellement périphérique.In addition, the upstream wall of the stirring chamber may have several cavities. The cavities may be distributed peripherally or partially peripherally.

Les cavités peuvent également être agencées de manière concentriques.The cavities can also be arranged concentrically.

Claims (5)

  1. Full cone spray nozzle (1) comprising a body (2) which has an inlet orifice (21) and an outlet orifice (22), and which has, on the side of the inlet orifice, a fluid inlet zone, which provides a stirring chamber (3) which has a substantially cylindrical peripheral wall (32), with an upstream wall (42) and a downstream wall (31), the downstream wall having an adjacent ejection orifice (30) and in direct fluidic communication with the outlet orifice (22) of the nozzle, the outlet orifice (22) having a substantially truncated cross-section and the ejection orifice (30) having a mainly cylindrical cross-section and a flared portion on the side of the outlet orifice (22), the upstream wall being passed through by at least one fluid inlet channel (41) which opens out along an axial direction into the stirring chamber with respect to said peripheral wall (32), and the peripheral wall being passed through by at least one other fluid inlet channel (33), which opens out into said stirring chamber along a tangential direction, said spray nozzle being characterised in that the upstream wall comprises at least one blind cavity (43) arranged at a distance from said axial inlet channel and opens onto a face oriented towards the inside of the chamber, and in that the cavity (43) is a peripheral groove surrounding said channel and having a straight, V-shaped cross-section.
  2. Spray nozzle (1) according to claim 1, characterised in that the groove is peripheral.
  3. Spray nozzle (1) according to claim 2, characterised in that the groove is annular.
  4. Spray nozzle (1) according to any one of claims 2 and 3, characterised in that the groove has a substantially V-shaped, straight cross-sectional profile.
  5. Spray nozzle (1) according to any one of claims 1 to 4, characterised in that the upstream wall (42) of the stirring chamber (3) is defined, at least partially, by a closing part (4) of said chamber.
EP15170680.1A 2014-06-06 2015-06-04 Solid-cone spray nozzle Active EP2952261B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15170680T PL2952261T3 (en) 2014-06-06 2015-06-04 Solid-cone spray nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1455150A FR3021880B1 (en) 2014-06-06 2014-06-06 SPRAY NOZZLE WITH FULL CONE

Publications (2)

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EP2952261A1 EP2952261A1 (en) 2015-12-09
EP2952261B1 true EP2952261B1 (en) 2019-11-20

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EP15170680.1A Active EP2952261B1 (en) 2014-06-06 2015-06-04 Solid-cone spray nozzle

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EP (1) EP2952261B1 (en)
BR (1) BR102015013148B1 (en)
ES (1) ES2773287T3 (en)
FR (1) FR3021880B1 (en)
PL (1) PL2952261T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108160359B (en) * 2016-12-08 2024-03-08 斯普瑞喷雾系统(上海)有限公司 Nozzle device capable of realizing multiple spraying functions
FR3132649A1 (en) 2022-02-16 2023-08-18 Solcera Cone spray nozzle

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
DE71453C (en) * berlin - anhaltische maschinenbau-actien-gesellschaft in Martinikenfelde bei Berlin Liquid atomizing nozzle with full dust cone
US2755134A (en) * 1955-06-28 1956-07-17 Allied Chem & Dye Corp Atomizing spray for oil gas production
US3275248A (en) 1964-08-07 1966-09-27 Spraying Systems Co Modified full cone nozzle
DE2733102A1 (en) * 1977-07-22 1979-02-01 Bayer Ag METHOD AND DEVICE FOR ATOMIZING LIQUIDS
FR2522537B1 (en) 1982-03-03 1985-10-18 Lafarge Refractaires SPRAY NOZZLE WITH TURBULENCE CHAMBER
US4570860A (en) 1984-02-06 1986-02-18 Wm. Steinen Mfg. Co. 180° Nozzle body having a solid cone spray pattern
ES2178702T3 (en) * 1995-03-29 2003-01-01 Bosch Gmbh Robert PERFORATED DISC, IN SPECIAL FOR INJECTION VALVE.
DE19815795A1 (en) * 1998-04-08 1999-10-14 Bosch Gmbh Robert Atomizer disc and fuel injector with atomizer disc
CN102059178B (en) * 2010-12-02 2012-07-04 厦门松霖科技有限公司 Water pulsating spraying mechanism

Non-Patent Citations (1)

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Title
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Also Published As

Publication number Publication date
BR102015013148A2 (en) 2016-07-05
FR3021880B1 (en) 2016-07-08
EP2952261A1 (en) 2015-12-09
BR102015013148B1 (en) 2020-12-15
PL2952261T3 (en) 2020-05-18
ES2773287T3 (en) 2020-07-10
FR3021880A1 (en) 2015-12-11

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