EP1386668A1 - Water spraying device producing a hollow thin-walled jet for making artificial snow - Google Patents

Water spraying device producing a hollow thin-walled jet for making artificial snow Download PDF

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Publication number
EP1386668A1
EP1386668A1 EP03291804A EP03291804A EP1386668A1 EP 1386668 A1 EP1386668 A1 EP 1386668A1 EP 03291804 A EP03291804 A EP 03291804A EP 03291804 A EP03291804 A EP 03291804A EP 1386668 A1 EP1386668 A1 EP 1386668A1
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EP
European Patent Office
Prior art keywords
nozzle
spraying device
angle
jet
nozzles
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.)
Granted
Application number
EP03291804A
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German (de)
French (fr)
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EP1386668B1 (en
Inventor
Michel Galvin
Eric David
Bernard Pergay
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Johnson Controls Neige Sas
Original Assignee
York Neige
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Filing date
Publication date
Application filed by York Neige filed Critical York Neige
Publication of EP1386668A1 publication Critical patent/EP1386668A1/en
Application granted granted Critical
Publication of EP1386668B1 publication Critical patent/EP1386668B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C3/00—Processes or apparatus specially adapted for producing ice or snow for winter sports or similar recreational purposes, e.g. for sporting installations; Producing artificial snow
    • F25C3/04—Processes or apparatus specially adapted for producing ice or snow for winter sports or similar recreational purposes, e.g. for sporting installations; Producing artificial snow for sledging or ski trails; Producing artificial snow
    • 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
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/06—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in annular, tubular or hollow conical form
    • 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
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B05B1/262—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors
    • B05B1/265—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors the liquid or other fluent material being symmetrically deflected about the axis of the nozzle
    • 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
    • B05B1/28—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with integral means for shielding the discharged liquid or other fluent material, e.g. to limit area of spray; with integral means for catching drips or collecting surplus liquid or other fluent material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2303/00—Special arrangements or features for producing ice or snow for winter sports or similar recreational purposes, e.g. for sporting installations; Special arrangements or features for producing artificial snow
    • F25C2303/048—Snow making by using means for spraying water
    • F25C2303/0481—Snow making by using means for spraying water with the use of compressed air

Definitions

  • the present invention relates to a device for spraying water under high pressure adapted to the formation of artificial snow.
  • the present invention relates to a device for spraying water under the shape of a hollow jet, as described in document FR-2,278,407 and proposes a improvement of the heat exchange capacity between ambient air and water spray under pressure.
  • the invention also provides a compact spraying device capable of adapting to atmospheric conditions, i.e. offering possibility of varying the flow of water under pressure and therefore increasing the amount of snow produced.
  • the spraying device comprises: - a tubular body which delimits a chamber connected to a pressurized water supply, a nozzle arranged at the exit of said chamber, provided with a mouth forming a diffuser which extends: from the neck of said nozzle and - a throttle member in the form of valve, arranged in the mouth of said nozzle to form the hollow wall jet slim ;
  • this device is characterized in that said mouth has a shaping surface of the hollow jet, which is arranged to produce at the latter, an asymmetry of revolution, around the axis of ejection.
  • the shaping surface of the jet includes a frustoconical part which extends from the neck of the nozzle and which is followed of a flow surface whose angle, in the axial plane, evolves according to a non-profile linear decreasing, from upstream to downstream, and whose axial length varies between a zero or almost zero value with a jet at this location whose exit angle corresponds to the angle of said frustoconical part, and a value of the order of a few millimeters, adapted to the choice of the desired outlet angle for the jet, which angle is less than said angle of the frustoconical part.
  • the opening angle of the jet hollow is between a value which is of the order of at least 60 ° and a value which may be less than 20 °.
  • the shaping surface of the jet hollow may have grooves which are oriented along a plane passing through the axis nozzle. These grooves are arranged either at the trailing edge of the nozzle, either at the neck of said nozzle, and over part of the length of the surface of shaping of the jet, that is to say of the frustoconical part of the mouth.
  • these grooves are positioned with a spacing angular between 2 ° and 10 °, of the order of 5 ° for example.
  • the axial length of the grooves is such that it maintains a leak rate when the valve is in position active closing, i.e. when it is in contact with the setting surface shape of the hollow jet in the mouth.
  • the grooves made on the shaping surface of the jet are obtained by machining, using a disc-type milling cutter, of which the periphery forms an angle of 90 °, which cutter is positioned in a plane passing through the axis of the nozzle.
  • the spraying device preferably comprises two nozzles which are associated with corresponding chambers supplied with water under pressure, which nozzles are centered in the same plane and form a angle which is between 60 ° and 100 °, of the order of 80 °; on the other hand it includes means of simultaneous adjustment of the valves, making it possible to vary at will the flow of water to be sprayed under pressure.
  • Each valve is preferably mobile under the effect of a screw-nut system, that is to say that each valve has a part acting as a nut maneuverable by means of a screw, which valve is immobilized in rotation by appropriate means, and each maneuvering screw is provided with a toothed wheel which is engaged with the same motorized endless screw, which motorized screw allows the simultaneous operation of said valves.
  • the spraying device includes nucleators arranged near the nozzles, which nucleators are supplied with pressurized water, along with the nozzles, and are supplied with air under pressure.
  • the spraying device comprises a one-piece body provided with boreholes forming the pressure water inlet chambers, which chambers are arranged to accommodate the spray nozzles; the body corresponding monoblock is also provided with holes for the installation of nucleators, which nucleators are in the form of cartridges screwed to the end of said boreholes.
  • FIGs 1 and 2 show the active spraying elements of the device which is shown and detailed below from Figure 14.
  • These elements consist of a nozzle 1 installed on the body 2 of the device, at the end of the chamber 3 in which the pressurized water circulates.
  • This nozzle 1 is centered on the axis 4 of the body 2 and, on this axis 4, there is a throttle member 5 including the downstream end, which is in the form of a valve 6, is disposed in the mouth 7 of said nozzle 1, as detailed by example in document FR-2,278,407.
  • the nozzle 1 is in the form of a flange fixed to the body 2 by means of suitable screws 9.
  • This nozzle 1 comprises, as detailed in FIGS. 3 and 4, a chamber 10 of which the downstream end is convergent so as to form a neck 11 which is followed by a diffuser 12 whose surface allows the shaping of the jet.
  • This diffuser 12 has two parts: a first part A, from the neck 11, which is frustoconical with a angle of the order of 60 °, and a second part B, in the extension of A, up to level of the trailing edge 13.
  • the surface of this second part B is characterized by a profile, in an axial plane, which is not linear but which evolves with an angle which goes decreasing from upstream to downstream. Note in Figure 3 that the exit angle practically corresponds to the angle of part A of the diffuser 12 and, as shown Figure 4, this angle decreases to a value which can be of the order of 20 ° by relative to the ejection axis 4.
  • Figures 1 and 2 illustrate this angle H, at the horizontal section of the nozzle 1 and the angle V at the vertical section of this nozzle.
  • FIG. 5 shows the nozzle 1 in perspective and illustrates the hollow jet by showing its imprint in a plane P which is perpendicular to the axis 4 of the nozzle.
  • This hollow jet has a shape which goes from the ellipse to a shape having a bone contour.
  • valve 6 which valve is movable, controlled by means more detailed far ; this valve also completely closes the passage at the level of the mouth 7.
  • FIGS. 6 to 13 show a particular arrangement of the jet shaping surface at the mouth 7.
  • These streaks 15 are shaped as shown in Figures 8 and 9, using a cutter 16 in the form of disc, the cutting part 17 of which has a V-shaped section with an angle of 90 ° for example.
  • the ridges 15 have a V-shaped profile; this profile allows to further develop the surface of the jet at the outlet of the nozzle and consequently improve the exchanges between water and surrounding air.
  • ridges 15 are regularly distributed over the entire periphery of the nozzle, at trailing edge level 13. They are arranged with an angular distance between 2 and 10 °, of the order of 5 ° for example.
  • Figures 10 to 13 show an alternative embodiment of the streaks.
  • the corresponding 15 'grooves are this time arranged at the neck 11 of the nozzle, horse on this pass.
  • These streaks 15 ′ are obtained as previously by means of a 16 'cutter of the disc type with small diameter to be able to penetrate into the mouth 7 of the nozzle and cut this nozzle up to the level of the neck 11.
  • the ridges 15 ' have the same shape around the entire periphery of the neck 11 and are arranged as above with an angular difference of between 2 and 10 °, of around 5 ° for example.
  • FIG. 14 represents a spraying device according to the invention comprising two nozzles 1 inclined with respect to each other, forming an angle ejection which is between 60 and 100 °, for example of the order of 80 °.
  • nozzles 1 are arranged on the body 2 of the device, which body is by example made of light alloy with channels for supplying said nozzles with pressurized water and channels for additionally supplying nucleators 20 with air under pressure, which nucleators spray a finely dosed mixture of water and of air which quickly forms ice crystals in the ambient air to seed the main jet at the outlet of each of the nozzles 1.
  • the device represented in FIG. 14 comprises two pairs of nucleators; each nozzle 1 in fact comprises two nucleators, one of which is disposed above said nozzle and the other below.
  • the spraying device is installed on a mat 21 of the type which is described in document FR-2,743,872.
  • This spraying device also includes means which allow to operate the valves 6 arranged in the mouth 7 of the nozzles 1.
  • valves adjust the flow rate of each nozzle, and are ordered simultaneously.
  • valve control means are arranged inside a casing 22 which covers the rear upper part of the device and which is fixed to the body 2 by the screw 23.
  • Figure 15 is a view of the spray device in section along a plane which passes through the axes 4 of the nozzles 1.
  • the body 2 of the spraying device includes chambers 3 which serve to supply each of the nozzles 1, which chambers are themselves supplied by a transverse channel 24 which communicates via a conduit 25 with the mast 21 as shown in FIG. 16.
  • conduit 26 Parallel to conduit 25, there is a conduit 26 through which air circulates under pressure which is used to supply the nucleators 20.
  • valves 6 arranged at the mouth 7 of the nozzles 1 are mounted on rods 29 which are movable longitudinally in the body 2; these rods 29 are immobilized in rotation by screws 30 of the nipple type, shown diagrammatically on the figure 15.
  • the rods 29 are maneuvered by means of screws 31.
  • the upstream end of each rod 29 has a threaded bore 32.
  • the screws 31 are mounted for rotation in the body 2 by means of bearings 33, for example, and they have at their end upstream a gear 34.
  • the two toothed wheels 34 corresponding to the maneuvering screws 31 of each of the valves 6 are engaged with an endless screw 35 which is motorized, by conventional means of the geared motor type 36.
  • This geared motor 36 which appears FIG. 16 is housed in the casing 22, fixed by any appropriate means to the body 2.
  • the power supply to the gear motor 36 is carried out by non-wired wiring. shown which passes through the orifice 40 arranged in the body 2, which orifice 40 corresponds to one of the channels of the mast 21.
  • a device for controlling the position of the toothed wheels for example constituted an index 38 as shown in Figure 16, allows, in cooperation with means 39, to adjust the position of the valve 6 in the mouth 7 of the nozzle 1.
  • FIG. 17 shows, in perspective, a nucleator 20 which is presented under the form of a cartridge screwed into an appropriate borehole of the body 2. This cartridge receives at its upstream end, the pressurized air which comes from channel 26 and it receives pressurized water from the chambers 3 used to supply the nozzles 1.
  • the pressurized water enters radially into a mixing chamber of the nucleator and at the output of the latter, the air and water mixture causes, when the temperature is adequate, the formation of ice crystals.
  • Figure 18 which is a partial section along a vertical plane passing through the axis 4 of the nozzle and by the axis 40 of a nucleator 20 shows inter alia, the channel 41 which extends between the nozzle supply chamber 3 and the chamber 43 which envelops the nucleator 20.
  • the inlet port 44 of the nucleator 20, for pressurized air, has a diameter substantially lower than that of the mixing chamber 45 of the nucleator.
  • valve 6 is in the form of an insert on the downstream end of the rod 29. This valve 6 is by example fixed by means of a screw 46 on the end of the operating rod 29.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The spraying device comprises a tubular body which delimits a chamber connected to a pressurized water inlet, a nozzle (1) with a diffuser and a throttling valve to form a thin walled hollow jet. The mouth of the nozzle comprises a surface for forming a jet with a dissymmetry of revolution.

Description

La présente invention concerne un dispositif de pulvérisation d'eau sous haute pression adaptée à la formation de neige artificielle.The present invention relates to a device for spraying water under high pressure adapted to the formation of artificial snow.

Il existe de nombreux dispositifs de fabrication de neige artificielle utilisant des techniques de pulvérisation d'eau ou d'un mélange d'air et d'eau.There are many devices for making artificial snow using techniques for spraying water or a mixture of air and water.

La présente invention concerne un dispositif qui permet de pulvériser l'eau sous la forme d'un jet creux, comme décrit dans le document FR-2 278 407 et propose une amélioration de la capacité d'échange thermique entre l'air ambiant et l'eau pulvérisée sous pression.The present invention relates to a device for spraying water under the shape of a hollow jet, as described in document FR-2,278,407 and proposes a improvement of the heat exchange capacity between ambient air and water spray under pressure.

L'invention propose également un dispositif de pulvérisation compact susceptible de s'adapter aux conditions atmosphériques c'est-à-dire d'offrir la possibilité de faire varier le débit d'eau sous pression et donc d'accroítre la quantité de neige produite.The invention also provides a compact spraying device capable of adapting to atmospheric conditions, i.e. offering possibility of varying the flow of water under pressure and therefore increasing the amount of snow produced.

Selon l'invention, le dispositif de pulvérisation comprend : - un corps tubulaire qui délimite une chambre reliée à une arrivée d'eau sous pression, une buse disposée à la sortie de ladite chambre, munie d'une embouchure formant un diffuseur qui s'étend : à partir du col de ladite buse et - un organe d'étranglement en forme de soupape, disposé dans l'embouchure de ladite buse pour former le jet creux à paroi mince ; ce dispositif est caractérisé par le fait que ladite embouchure comporte une surface de mise en forme du jet creux, qui est aménagée pour produire au niveau de ce dernier, une dissymétrie de révolution, autour de l'axe d'éjection.According to the invention, the spraying device comprises: - a tubular body which delimits a chamber connected to a pressurized water supply, a nozzle arranged at the exit of said chamber, provided with a mouth forming a diffuser which extends: from the neck of said nozzle and - a throttle member in the form of valve, arranged in the mouth of said nozzle to form the hollow wall jet slim ; this device is characterized in that said mouth has a shaping surface of the hollow jet, which is arranged to produce at the latter, an asymmetry of revolution, around the axis of ejection.

Selon une forme de réalisation particulière, la surface de mise en forme du jet comprend une partie tronconique qui s'étend à partir du col de la buse et qui est suivie d'une surface d'écoulement dont l'angle, dans le plan axial, évolue selon un profil non linéaire allant en diminuant, de l'amont vers l'aval, et dont la longueur axiale varie entre une valeur nulle ou quasiment nulle avec à cet endroit un jet dont l'angle de sortie correspond à l'angle de ladite partie tronconique, et une valeur de l'ordre de quelques millimètres, adaptée au choix de l'angle de sortie souhaité pour le jet, lequel angle est inférieur audit angle de la partie tronconique.According to a particular embodiment, the shaping surface of the jet includes a frustoconical part which extends from the neck of the nozzle and which is followed of a flow surface whose angle, in the axial plane, evolves according to a non-profile linear decreasing, from upstream to downstream, and whose axial length varies between a zero or almost zero value with a jet at this location whose exit angle corresponds to the angle of said frustoconical part, and a value of the order of a few millimeters, adapted to the choice of the desired outlet angle for the jet, which angle is less than said angle of the frustoconical part.

Selon une disposition préférentielle de l'invention, l'angle d'ouverture du jet creux est compris entre une valeur qui est de l'ordre de 60° au moins et une valeur qui peut être inférieure à 20°.According to a preferred arrangement of the invention, the opening angle of the jet hollow is between a value which is of the order of at least 60 ° and a value which may be less than 20 °.

Selon une autre disposition de l'invention, la surface de mise en forme du jet creux peut comporter des rainures qui sont orientées selon un plan passant par l'axe de la buse. Ces rainures sont aménagées soit au niveau du bord de fuite de la buse, soit au niveau du col de ladite buse, et sur une partie de la longueur de la surface de mise en forme du jet c'est-à-dire de la partie tronconique de l'embouchure.According to another arrangement of the invention, the shaping surface of the jet hollow may have grooves which are oriented along a plane passing through the axis nozzle. These grooves are arranged either at the trailing edge of the nozzle, either at the neck of said nozzle, and over part of the length of the surface of shaping of the jet, that is to say of the frustoconical part of the mouth.

Toujours selon l'invention, ces rainures sont positionnées avec un espacement angulaire compris entre 2° et 10°, de l'ordre de 5° par exemple.Still according to the invention, these grooves are positioned with a spacing angular between 2 ° and 10 °, of the order of 5 ° for example.

Selon une autre disposition de l'invention, la longueur axiale des rainures est telle qu'elle permet de conserver un débit de fuite lorsque la soupape est en position active de fermeture c'est-à-dire lorsqu'elle est en contact avec la surface de mise en forme du jet creux dans l'embouchure.According to another arrangement of the invention, the axial length of the grooves is such that it maintains a leak rate when the valve is in position active closing, i.e. when it is in contact with the setting surface shape of the hollow jet in the mouth.

Encore selon l'invention, les rainures réalisées sur la surface de mise en forme du jet sont obtenues par usinage, au moyen d'une fraise de forme du type disque, dont la périphérie forme un angle de 90°, laquelle fraise est positionnée dans un plan passant par l'axe de la buse.Still according to the invention, the grooves made on the shaping surface of the jet are obtained by machining, using a disc-type milling cutter, of which the periphery forms an angle of 90 °, which cutter is positioned in a plane passing through the axis of the nozzle.

Le dispositif de pulvérisation selon l'invention comprend de préférence deux buses qui sont associées à des chambres correspondantes alimentées en eau sous pression, lesquelles buses sont centrées dans un même plan et font entre elles un angle qui est compris entre 60° et 100°, de l'ordre de 80° ; d'autre part il comprend des moyens de réglage simultanés des soupapes, permettant de faire varier à volonté le débit de l'eau à pulvériser sous pression.The spraying device according to the invention preferably comprises two nozzles which are associated with corresponding chambers supplied with water under pressure, which nozzles are centered in the same plane and form a angle which is between 60 ° and 100 °, of the order of 80 °; on the other hand it includes means of simultaneous adjustment of the valves, making it possible to vary at will the flow of water to be sprayed under pressure.

Chaque soupape est de préférence mobile sous l'effet d'un système vis-écrou, c'est-à-dire que chaque soupape comporte une partie faisant office d'écrou manoeuvrable au moyen d'une vis, laquelle soupape est immobilisée en rotation par des moyens appropriés, et chaque vis de manoeuvre est munie d'une roue dentée qui est en prise avec une même vis sans fin motorisée, laquelle vis motorisée permet la manoeuvre simultanée desdites soupapes.Each valve is preferably mobile under the effect of a screw-nut system, that is to say that each valve has a part acting as a nut maneuverable by means of a screw, which valve is immobilized in rotation by appropriate means, and each maneuvering screw is provided with a toothed wheel which is engaged with the same motorized endless screw, which motorized screw allows the simultaneous operation of said valves.

Toujours selon l'invention, le dispositif de pulvérisation comporte des nucléateurs disposés à proximité des buses, lesquels nucléateurs sont alimentés en eau sous pression, en même temps que les buses, et sont alimentés en air sous pression.Still according to the invention, the spraying device includes nucleators arranged near the nozzles, which nucleators are supplied with pressurized water, along with the nozzles, and are supplied with air under pressure.

Le dispositif de pulvérisation selon l'invention, comprend un corps monobloc muni de forages formant les chambres d'arrivée d'eau sous pression, lesquelles chambres sont aménagées pour accueillir les buses de pulvérisation ; le corps monobloc correspondant est également muni de forages pour l'installation de nucléateurs, lesquels nucléateurs se présentent sous la forme de cartouches vissées à l'extrémité desdits forages. The spraying device according to the invention comprises a one-piece body provided with boreholes forming the pressure water inlet chambers, which chambers are arranged to accommodate the spray nozzles; the body corresponding monoblock is also provided with holes for the installation of nucleators, which nucleators are in the form of cartridges screwed to the end of said boreholes.

Mais l'invention sera encore détaillée à l'aide de la description suivante et des dessins annexés, donnés à titre indicatif, et dans lesquels :

  • la figure 1 représente en coupe horizontale, la buse du dispositif de pulvérisation selon l'invention ;
  • la figure 2 représente la buse de pulvérisation en coupe verticale ;
  • la figure 3 est une vue agrandie en coupe horizontale du diffuseur de la buse de pulvérisation ;
  • la figure 4 est une vue agrandie également du diffuseur selon une coupe verticale ;
  • la figure 5 représente le jet creux en sortie de la buse selon l'invention ;
  • la figure 6 représente une coupe verticale agrandie d'une portion du diffuseur avec un aménagement au niveau du bord de fuite en forme de stries ;
  • la figure 7 représente en coupe horizontale une portion agrandie du diffuseur muni des stries ;
  • la figure 8 représente l'opération d'usinage des stries au niveau du bord de fuite du diffuseur, au moyen d'un outil du genre fraise-disque ;
  • la figure 9 représente une portion du diffuseur, vu de face, avec l'outil de façonnage des stries ;
  • la figure 10 représente une variante du mode de réalisation des figures 6 à 9, et en particulier une coupe verticale du diffuseur montrant des stries aménagées au niveau du col de la buse ;
  • la figure 11 est une vue en coupe horizontale montrant les stries aménagées au niveau du col du diffuseur ;
  • la figure 12 illustre l'opération de façonnage des stries au niveau du col du diffuseur au moyen d'une fraise-disque de petit diamètre ;
  • la figure 13 est une vue de face partielle du diffuseur montrant aussi l'outil de façonnage des stries ;
  • la figure 14 est une vue en perspective du dispositif de pulvérisation complet, selon l'invention, comportant deux buses de pulvérisation ;
  • la figure 15 est une vue en coupe axiale du dispositif de pulvérisation, laquelle coupe se situe au niveau des axes des buses ;
  • la figure 16 est une coupe selon le plan vertical médian du dispositif de pulvérisation repéré 16-16 figure précédente ;
  • la figure 17 montre un nucléateur tel qu'installé au-dessus de l'une des buses ;
  • la figure 18 est une vue partielle en coupe verticale passant par l'axe d'une buse du dispositif de pulvérisation.
However, the invention will be further detailed with the aid of the following description and the appended drawings, given for information only, and in which:
  • Figure 1 shows in horizontal section, the nozzle of the spraying device according to the invention;
  • Figure 2 shows the spray nozzle in vertical section;
  • Figure 3 is an enlarged view in horizontal section of the diffuser of the spray nozzle;
  • Figure 4 is an enlarged view also of the diffuser in a vertical section;
  • FIG. 5 represents the hollow jet at the outlet of the nozzle according to the invention;
  • Figure 6 shows an enlarged vertical section of a portion of the diffuser with an arrangement at the trailing edge in the form of streaks;
  • Figure 7 shows in horizontal section an enlarged portion of the diffuser provided with the ridges;
  • Figure 8 shows the machining operation of the ridges at the trailing edge of the diffuser, using a tool of the cutter-disc type;
  • FIG. 9 represents a portion of the diffuser, seen from the front, with the tool for shaping the ridges;
  • FIG. 10 represents a variant of the embodiment of FIGS. 6 to 9, and in particular a vertical section of the diffuser showing striations arranged at the level of the neck of the nozzle;
  • Figure 11 is a horizontal sectional view showing the grooves arranged at the neck of the diffuser;
  • FIG. 12 illustrates the operation of shaping the ridges at the level of the neck of the diffuser using a small diameter disc cutter;
  • FIG. 13 is a partial front view of the diffuser also showing the tool for shaping the ridges;
  • FIG. 14 is a perspective view of the complete spraying device, according to the invention, comprising two spray nozzles;
  • Figure 15 is an axial sectional view of the spraying device, which section is located at the axes of the nozzles;
  • Figure 16 is a section along the median vertical plane of the spray device identified 16-16 previous figure;
  • Figure 17 shows a nucleator as installed above one of the nozzles;
  • FIG. 18 is a partial view in vertical section passing through the axis of a nozzle of the spraying device.

Les figures 1 et 2 montrent les éléments actifs de pulvérisation du dispositif qui est représenté et détaillé plus loin à partir de la figure 14.Figures 1 and 2 show the active spraying elements of the device which is shown and detailed below from Figure 14.

Ces éléments sont constitués d'une buse 1 installée sur le corps 2 du dispositif, à l'extrémité de la chambre 3 dans laquelle circule l'eau sous pression.These elements consist of a nozzle 1 installed on the body 2 of the device, at the end of the chamber 3 in which the pressurized water circulates.

Cette buse 1 est centrée sur l'axe 4 du corps 2 et, sur cet axe 4, on trouve un organe d'étranglement 5 dont l'extrémité aval, qui se présente sous la forme d'une soupape 6, est disposée dans l'embouchure 7 de ladite buse 1, comme détaillé par exemple dans le document FR-2 278 407.This nozzle 1 is centered on the axis 4 of the body 2 and, on this axis 4, there is a throttle member 5 including the downstream end, which is in the form of a valve 6, is disposed in the mouth 7 of said nozzle 1, as detailed by example in document FR-2,278,407.

La buse 1 se présente sous la forme d'un flasque fixé sur le corps 2 au moyen de vis appropriées 9.The nozzle 1 is in the form of a flange fixed to the body 2 by means of suitable screws 9.

Cette buse 1 comprend, comme détaillé figures 3 et 4, une chambre 10 dont l'extrémité aval est convergente de façon à former un col 11 qui est suivi d'un diffuseur 12 dont la surface permet la mise en forme du jet. Ce diffuseur 12 comporte deux parties : une première partie A, à partir du col 11, qui est de forme tronconique avec un angle de l'ordre de 60°, et une seconde partie B, dans le prolongement de A, jusqu'au niveau du bord de fuite 13. La surface de cette seconde partie B, se caractérise par un profil, dans un plan axial, qui n'est pas linéaire mais qui évolue avec un angle qui va diminuant partant de l'amont vers l'aval. On remarque figure 3 que l'angle de sortie correspond pratiquement à l'angle de la partie A du diffuseur 12 et, comme représenté figure 4, cet angle diminue jusqu'à une valeur qui peut être de l'ordre de 20° par rapport à l'axe d'éjection 4.This nozzle 1 comprises, as detailed in FIGS. 3 and 4, a chamber 10 of which the downstream end is convergent so as to form a neck 11 which is followed by a diffuser 12 whose surface allows the shaping of the jet. This diffuser 12 has two parts: a first part A, from the neck 11, which is frustoconical with a angle of the order of 60 °, and a second part B, in the extension of A, up to level of the trailing edge 13. The surface of this second part B, is characterized by a profile, in an axial plane, which is not linear but which evolves with an angle which goes decreasing from upstream to downstream. Note in Figure 3 that the exit angle practically corresponds to the angle of part A of the diffuser 12 and, as shown Figure 4, this angle decreases to a value which can be of the order of 20 ° by relative to the ejection axis 4.

Les figures 1 et 2 illustrent cet angle H, au niveau de la coupe horizontale de la buse 1 et l'angle V au niveau de la coupe verticale de cette buse.Figures 1 and 2 illustrate this angle H, at the horizontal section of the nozzle 1 and the angle V at the vertical section of this nozzle.

Cet aménagement au niveau du bord de fuite 13 de la buse permet d'établir un jet creux qui présente une dissymétrie de révolution comme représenté figure 5. La figure 5 montre la buse 1 en perspective et illustre le jet creux en montrant son empreinte dans un plan P qui est perpendiculaire à l'axe 4 de la buse.This arrangement at the trailing edge 13 of the nozzle makes it possible to establish a hollow jet which has an asymmetry of revolution as shown in Figure 5. The Figure 5 shows the nozzle 1 in perspective and illustrates the hollow jet by showing its imprint in a plane P which is perpendicular to the axis 4 of the nozzle.

Ce jet creux présente une forme qui va de l'ellipse à une forme ayant un contour d'osselet.This hollow jet has a shape which goes from the ellipse to a shape having a bone contour.

Cette dissymétrie au niveau du bord de fuite 13 est obtenue comme représenté figure 3, au moyen d'un dressage de l'extrémité aval de la buse 1 selon deux plans formant un dièdre ; l'arête 14 de ce dièdre étant disposée dans le plan vertical Pv visible figure 5, lequel plan Pv passe par l'axe 4. L'arête de ce dièdre est matérialisée par les arêtes 14 visibles figure 5 au niveau de la sortie de la buse 1. This asymmetry at the trailing edge 13 is obtained as shown Figure 3, by straightening the downstream end of the nozzle 1 in two planes forming a dihedral; the edge 14 of this dihedral being disposed in the vertical plane Pv visible in figure 5, which plane Pv passes through the axis 4. The edge of this dihedral is materialized by the edges 14 visible in FIG. 5 at the outlet of the nozzle 1.

L'épaisseur du film d'eau formant ce jet creux peut être modulée au moyen de la soupape 6, laquelle soupape est mobile, commandée par des moyens détaillés plus loin ; cette soupape permet également d'obturer totalement le passage au niveau de l'embouchure 7.The thickness of the water film forming this hollow jet can be adjusted by means of valve 6, which valve is movable, controlled by means more detailed far ; this valve also completely closes the passage at the level of the mouth 7.

Les figures suivantes 6 à 13, montrent un aménagement particulier de la surface de mise en forme du jet au niveau de l'embouchure 7. Figures 6 et 7, on remarque, au niveau du bord de fuite 13 de la buse 1, des stries 15. Ces stries 15 sont façonnées comme représenté figures 8 et 9, au moyen d'une fraise 16 en forme de disque, dont la partie coupante 17 a une section en forme de V avec un angle de 90° par exemple.The following figures 6 to 13 show a particular arrangement of the jet shaping surface at the mouth 7. Figures 6 and 7, note, at the trailing edge 13 of the nozzle 1, streaks 15. These streaks 15 are shaped as shown in Figures 8 and 9, using a cutter 16 in the form of disc, the cutting part 17 of which has a V-shaped section with an angle of 90 ° for example.

Les stries 15 ont un profil en V ; ce profil permet de développer encore plus la surface du jet en sortie de la buse et d'améliorer en conséquence les échanges entre l'eau et l'air environnant.The ridges 15 have a V-shaped profile; this profile allows to further develop the surface of the jet at the outlet of the nozzle and consequently improve the exchanges between water and surrounding air.

Ces stries 15 sont régulièrement réparties sur toute la périphérie de la buse, au niveau du bord de fuite 13. Elles sont disposées avec un écart angulaire compris entre 2 et 10°, de l'ordre de 5° par exemple.These ridges 15 are regularly distributed over the entire periphery of the nozzle, at trailing edge level 13. They are arranged with an angular distance between 2 and 10 °, of the order of 5 ° for example.

La profondeur de ces stries varie en fonction de leur position sur la sortie. Dans le plan horizontal, ces stries sont relativement modestes alors que dans le plan vertical, elles sont au contraire importantes.The depth of these streaks varies depending on their position on the outlet. In in the horizontal plane, these streaks are relatively modest whereas in the vertical plane, on the contrary, they are important.

Les figures 10 à 13 représentent une variante de réalisation des stries. Les stries 15' correspondantes sont cette fois disposées au niveau du col 11 de la buse, à cheval sur ce col. Ces stries 15' sont obtenues comme précédemment au moyen d'une fraise 16' du type à disque de petit diamètre pour pouvoir pénétrer dans l'embouchure 7 de la buse et venir entailler cette buse jusqu'au niveau du col 11.Figures 10 to 13 show an alternative embodiment of the streaks. The corresponding 15 'grooves are this time arranged at the neck 11 of the nozzle, horse on this pass. These streaks 15 ′ are obtained as previously by means of a 16 'cutter of the disc type with small diameter to be able to penetrate into the mouth 7 of the nozzle and cut this nozzle up to the level of the neck 11.

Ces stries 15' sont à cheval au niveau du col 11 et permettent d'établir un débit très faible au niveau de la buse, sous l'effet de la soupape 7 ; elles permettent également d'éviter une fermeture totale du canal de sortie.These streaks 15 'are astride the neck 11 and allow a flow to be established very weak at the nozzle, under the effect of the valve 7; they allow also to avoid a total closure of the outlet channel.

Les stries 15' ont la même forme sur tout le pourtour du col 11 et elles sont disposées comme précédemment avec un écart angulaire compris entre 2 et 10°, de l'ordre de 5° par exemple.The ridges 15 'have the same shape around the entire periphery of the neck 11 and are arranged as above with an angular difference of between 2 and 10 °, of around 5 ° for example.

Ces stries 15' s'étendent pour 1/3 ou 1/4 en amont du col 11 et pour le reste en aval, dans la partie tronconique A du diffuseur 12.These streaks 15 'extend for 1/3 or 1/4 upstream of the neck 11 and for the rest in downstream, in the frustoconical part A of the diffuser 12.

La figure 14 représente un dispositif de pulvérisation selon l'invention comportant deux buses 1 inclinées l'une par rapport à l'autre, formant un angle d'éjection qui est compris entre 60 et 100°, par exemple de l'ordre de 80°. FIG. 14 represents a spraying device according to the invention comprising two nozzles 1 inclined with respect to each other, forming an angle ejection which is between 60 and 100 °, for example of the order of 80 °.

Ces buses 1 sont disposées sur le corps 2 du dispositif, lequel corps est par exemple réalisé en alliage léger avec des canaux pour l'alimentation desdites buses en eau sous pression et des canaux pour, en plus, alimenter des nucléateurs 20 en air sous pression, lesquels nucléateurs pulvérisent un mélange finement dosé d'eau et d'air qui, rapidement, forme dans l'air ambiant des cristaux de glace pour ensemencer le jet principal en sortie de chacune des buses 1.These nozzles 1 are arranged on the body 2 of the device, which body is by example made of light alloy with channels for supplying said nozzles with pressurized water and channels for additionally supplying nucleators 20 with air under pressure, which nucleators spray a finely dosed mixture of water and of air which quickly forms ice crystals in the ambient air to seed the main jet at the outlet of each of the nozzles 1.

Le dispositif représenté figure 14 comporte deux paires de nucléateurs ; chaque buse 1 comporte en effet deux nucléateurs dont l'un est disposé au-dessus de ladite buse et l'autre en-dessous. Ces nucléateurs 20, par exemple tels que décrits dans le document WO-99 00258, pulvérisent leur mélange de part et d'autre du jet creux et en particulier dans la zone aplatie et creuse de ce jet telle qu'elle apparaít figure 5.The device represented in FIG. 14 comprises two pairs of nucleators; each nozzle 1 in fact comprises two nucleators, one of which is disposed above said nozzle and the other below. These nucleators 20, for example as described in the document WO-99 00258, spray their mixture on either side of the hollow jet and especially in the flattened and hollow area of this jet as it appears in Figure 5.

Le dispositif de pulvérisation est installé sur un mat 21 du type de celui qui est décrit dans le document FR-2 743 872.The spraying device is installed on a mat 21 of the type which is described in document FR-2,743,872.

Ce dispositif de pulvérisation comporte également des moyens qui permettent de manoeuvrer les soupapes 6 disposées dans l'embouchure 7 des buses 1.This spraying device also includes means which allow to operate the valves 6 arranged in the mouth 7 of the nozzles 1.

Ces soupapes permettent de régler le débit de chaque buse, et elles sont commandées simultanément.These valves adjust the flow rate of each nozzle, and are ordered simultaneously.

Les moyens de commande des soupapes, détaillés sur les figures suivantes, sont disposés à l'intérieur d'un carter 22 qui coiffe la partie supérieure arrière du dispositif et qui est fixé sur le corps 2 par la vis 23.The valve control means, detailed in the following figures, are arranged inside a casing 22 which covers the rear upper part of the device and which is fixed to the body 2 by the screw 23.

La figure 15 est une vue du dispositif de pulvérisation en coupe selon un plan qui passe par les axes 4 des buses 1.Figure 15 is a view of the spray device in section along a plane which passes through the axes 4 of the nozzles 1.

Le corps 2 du dispositif de pulvérisation, réalisé comme indiqué précédemment en alliage léger, comporte les chambres 3 qui servent à alimenter chacune des buses 1, lesquelles chambres sont elles-mêmes alimentées par un canal transversal 24 qui communique par un conduit 25 avec le mat 21 comme représenté figure 16.The body 2 of the spraying device, produced as indicated above made of light alloy, includes chambers 3 which serve to supply each of the nozzles 1, which chambers are themselves supplied by a transverse channel 24 which communicates via a conduit 25 with the mast 21 as shown in FIG. 16.

Parallèlement au conduit 25, on trouve un conduit 26 par lequel circule l'air sous pression qui sert à l'alimentation des nucléateurs 20.Parallel to conduit 25, there is a conduit 26 through which air circulates under pressure which is used to supply the nucleators 20.

Les soupapes 6 disposées au niveau de l'embouchure 7 des buses 1, sont montées sur des tiges 29 qui sont mobiles longitudinalement dans le corps 2 ; ces tiges 29 sont immobilisées en rotation par des vis 30 du type à téton, schématisées sur la figure 15.The valves 6 arranged at the mouth 7 of the nozzles 1 are mounted on rods 29 which are movable longitudinally in the body 2; these rods 29 are immobilized in rotation by screws 30 of the nipple type, shown diagrammatically on the figure 15.

Les tiges 29 sont manoeuvrées au moyen de vis 31. L'extrémité amont de chaque tige 29 comporte un forage fileté 32. Les vis 31 sont montées à rotation dans le corps 2 au moyen de roulements 33, par exemple, et elles comportent à leur extrémité amont une roue dentée 34.The rods 29 are maneuvered by means of screws 31. The upstream end of each rod 29 has a threaded bore 32. The screws 31 are mounted for rotation in the body 2 by means of bearings 33, for example, and they have at their end upstream a gear 34.

Les deux roues dentées 34, correspondant aux vis de manoeuvre 31 de chacune des soupapes 6, sont en prise avec une vis sans fin 35 qui est motorisée, par des moyens classiques du type moto-réducteur 36. Ce moto-réducteur 36, qui apparaít figure 16, est logé dans le carter 22, fixé par tous moyens appropriés sur le corps 2.The two toothed wheels 34, corresponding to the maneuvering screws 31 of each of the valves 6 are engaged with an endless screw 35 which is motorized, by conventional means of the geared motor type 36. This geared motor 36, which appears FIG. 16 is housed in the casing 22, fixed by any appropriate means to the body 2.

On remarque, figure 16, que la vis sans fin motorisée 35 est guidée à son extrémité dans un palier 37 aménagé dans le corps 2 du dispositif.Note, Figure 16, that the motorized worm 35 is guided at its end in a bearing 37 arranged in the body 2 of the device.

L'alimentation électrique du moto-réducteur 36 s'effectue par un câblage non représenté qui passe par l'orifice 40 aménagé dans le corps 2, lequel orifice 40 correspond à l'un des canaux du mât 21.The power supply to the gear motor 36 is carried out by non-wired wiring. shown which passes through the orifice 40 arranged in the body 2, which orifice 40 corresponds to one of the channels of the mast 21.

Un dispositif de contrôle de position des roues dentées, constitué par exemple d'un index 38 comme représenté figure 16, permet, en coopération avec des moyens appropriés 39, de régler la position de la soupape 6 dans l'embouchure 7 de la buse 1.A device for controlling the position of the toothed wheels, for example constituted an index 38 as shown in Figure 16, allows, in cooperation with means 39, to adjust the position of the valve 6 in the mouth 7 of the nozzle 1.

La figure 17 montre, en perspective, un nucléateur 20 qui se présente sous la forme d'une cartouche vissée dans un forage approprié du corps 2. Cette cartouche reçoit à son extrémité amont, l'air sous pression qui provient du canal 26 et elle reçoit de l'eau sous pression provenant des chambres 3 servant à l'alimentation des buses 1.FIG. 17 shows, in perspective, a nucleator 20 which is presented under the form of a cartridge screwed into an appropriate borehole of the body 2. This cartridge receives at its upstream end, the pressurized air which comes from channel 26 and it receives pressurized water from the chambers 3 used to supply the nozzles 1.

L'eau sous pression pénètre radialement dans une chambre de mélange du nucléateur et en sortie de ce dernier, le mélange air et eau provoque, lorsque la température est adéquate, la formation de cristaux de glace.The pressurized water enters radially into a mixing chamber of the nucleator and at the output of the latter, the air and water mixture causes, when the temperature is adequate, the formation of ice crystals.

La figure 18 qui est une coupe partielle selon un plan vertical passant par l'axe 4 de la buse et par l'axe 40 d'un nucléateur 20 montre entre autres, le canal 41 qui s'étend entre la chambre 3 d'alimentation de la buse et la chambre 43 qui enveloppe le nucléateur 20.Figure 18 which is a partial section along a vertical plane passing through the axis 4 of the nozzle and by the axis 40 of a nucleator 20 shows inter alia, the channel 41 which extends between the nozzle supply chamber 3 and the chamber 43 which envelops the nucleator 20.

L'orifice d'entrée 44 du nucléateur 20, pour l'air sous pression, a un diamètre sensiblement inférieur à celui de la chambre de mélange 45 du nucléateur.The inlet port 44 of the nucleator 20, for pressurized air, has a diameter substantially lower than that of the mixing chamber 45 of the nucleator.

Figures 15 et 18, on remarque que la soupape 6 se présente sous la forme d'une pièce rapportée sur l'extrémité aval de la tige 29. Cette soupape 6 est par exemple fixée au moyen d'une vis 46 sur l'extrémité de la tige de manoeuvre 29.Figures 15 and 18, we note that the valve 6 is in the form of an insert on the downstream end of the rod 29. This valve 6 is by example fixed by means of a screw 46 on the end of the operating rod 29.

Cette disposition constructive permet d'utiliser des matériaux différents pour les pièces en question et en particulier un matériau dur du type acier pour la soupape 6 qui est soumise à l'érosion du fait du passage de l'eau sous pression.This constructive arrangement makes it possible to use different materials for the parts in question and in particular a hard steel type material for valve 6 which is subject to erosion due to the passage of water under pressure.

Claims (10)

Dispositif de pulvérisation d'eau sous pression comprenant : - un corps tubulaire qui délimite une chambre (3) reliée à une arrivée d'eau sous pression, - une buse (1) disposée à la sortie de ladite chambre (3), munie d'une embouchure (7) formant un diffuseur (12) qui s'étend à partir du col (11) de ladite buse et - un organe d'étranglement en forme de soupape (6), disposé dans l'embouchure (7) de ladite buse pour former un jet creux à paroi mince, caractérisé en ce que ladite embouchure (7) comporte une surface de mise en forme du jet creux, qui est aménagée pour produire au niveau de ce dernier, une dissymétrie de révolution autour de l'axe d'éjection (4).Pressure water spraying device comprising: - a tubular body which delimits a chamber (3) connected to a pressurized water inlet, - a nozzle (1) disposed at the outlet of said chamber (3), provided with '' a mouth (7) forming a diffuser (12) which extends from the neck (11) of said nozzle and - a valve-shaped throttling member (6), disposed in the mouth (7) of said nozzle for forming a thin-walled hollow jet, characterized in that said mouth (7) has a surface for shaping the hollow jet, which is arranged to produce, at the level of the latter, an asymmetry of revolution around the ejection axis (4). Dispositif de pulvérisation selon la revendication 1, caractérisé en ce que la surface de mise en forme du jet comprend une partie tronconique A qui s'étend à partir du col (11) de la buse (1), et qui est suivie d'une surface d'écoulement B dont l'angle, dans le plan longitudinal axial de ladite buse, évolue selon un profil non linéaire allant en diminuant de l'amont vers l'aval, et dont la longueur axiale varie entre une valeur nulle ou quasiment nulle avec, à cet endroit, un jet dont l'angle de sortie correspond à l'angle de ladite partie tronconique, et une valeur de l'ordre de quelques millimètres, adaptée au choix de l'angle de sortie souhaité pour ledit jet, lequel angle étant inférieur audit angle de la partie tronconique A.Spraying device according to claim 1, characterized in that the shaping surface of the jet comprises a frustoconical part A which extends from the neck (11) of the nozzle (1), and which is followed by a flow surface B whose angle, in the axial longitudinal plane of said nozzle, evolves according to a non-linear profile decreasing from upstream to downstream, and whose axial length varies between a zero or almost zero value with, at this location, a jet whose exit angle corresponds to the angle of said frustoconical part, and a value of the order of a few millimeters, adapted to the choice of the desired exit angle for said jet, which angle being less than said angle of the frustoconical part A. Dispositif de pulvérisation selon la revendication 2, caractérisé en ce que l'angle d'ouverture du jet creux est compris entre une valeur H qui est de l'ordre de 60° au moins et une valeur V qui peut être inférieure à 20°.Spraying device according to claim 2, characterized in that the opening angle of the hollow jet is between a value H which is of the order of at least 60 ° and a value V which can be less than 20 °. Dispositif de pulvérisation selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il comporte au niveau de la surface de mise en forme du jet creux, des rainures (15, 15') qui sont orientées selon un plan passant par l'axe (4) de la buse, lesquelles rainures sont aménagées soit au niveau du bord de fuite (13) de ladite buse soit au niveau du col (11).Spraying device according to any one of Claims 1 to 3, characterized in that it comprises, at the level of the shaping surface of the hollow jet, grooves (15, 15 ') which are oriented along a plane passing through the axis (4) of the nozzle, which grooves are arranged either at the trailing edge (13) of said nozzle or at the neck (11). Dispositif de pulvérisation selon la revendication 4, caractérisé en ce que les rainures (15, 15'), sont positionnées avec un espacement angulaire compris entre 2° et 10°.Spraying device according to claim 4, characterized in that the grooves (15, 15 ') are positioned with an angular spacing between 2 ° and 10 °. Dispositif de pulvérisation selon la revendication 4, caractérisé en ce que les rainures (15, 15'), ont une longueur axiale telle qu'elles permettent de conserver un débit de fuite lorsque la soupape (6) est en position active de fermeture.Spraying device according to claim 4, characterized in that the grooves (15, 15 ') have an axial length such that they make it possible to maintain a leakage flow when the valve (6) is in the active closed position. Dispositif de pulvérisation selon l'une quelconque des revendications 4 à 6, caractérisé en ce qu'il comporte des rainures (15, 15') réalisées au moyen d'une fraise de forme (16, 16') du type disque, dont la périphérie forme un angle de 90°, laquelle fraise (16, 16') est positionnée dans un plan passant par l'axe de la buse.Spraying device according to any one of Claims 4 to 6, characterized in that it comprises grooves (15, 15 ') produced by means of a shaped milling cutter (16, 16') of the disc type, the periphery forms an angle of 90 °, which cutter (16, 16 ') is positioned in a plane passing through the axis of the nozzle. Dispositif de pulvérisation selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il comprend deux buses (1) qui sont associées à des chambres (3) correspondantes alimentées en eau sous pression, lesquelles buses (1) sont centrées dans un même plan et font entre elles un angle qui est compris entre 60° et 100°, et en ce qu'il comprend des moyens de réglage simultanés des soupapes (6) desdites buses permettant de faire varier à volonté le débit de l'eau à pulvériser sous pression.Spraying device according to any one of Claims 1 to 7, characterized in that it comprises two nozzles (1) which are associated with corresponding chambers (3) supplied with pressurized water, which nozzles (1) are centered in the same plane and make an angle between them which is between 60 ° and 100 °, and in that it comprises means for simultaneous adjustment of the valves (6) of said nozzles making it possible to vary the flow of water at will spray under pressure. Dispositif de pulvérisation selon la revendication 8, caractérisé en ce qu'il comporte des soupapes (6) mobiles sous l'effet d'un système vis/écrou, chaque soupape comportant une partie faisant office d'écrou, manoeuvrable au moyen d'une vis (31), laquelle soupape (6) est immobilisée en rotation par des moyens appropriés et chaque vis de manoeuvre (31) étant munie d'une roue dentée (34) qui est en prise avec une même vis sans fin (35) motorisée, laquelle vis motorisée permet la manoeuvre simultanée des deux soupapes (6).Spraying device according to claim 8, characterized in that it comprises valves (6) movable under the effect of a screw / nut system, each valve comprising a part acting as a nut, operable by means of a screw (31), which valve (6) is immobilized in rotation by appropriate means and each maneuvering screw (31) being provided with a toothed wheel (34) which is engaged with the same motorized endless screw (35) , which motorized screw allows the simultaneous operation of the two valves (6). Dispositif de pulvérisation selon la revendication 8, caractérisé en ce qu'il comprend un corps monobloc (2) muni de forages formant les chambres (3) d'arrivée d'eau sous pression, lesquelles chambres sont aménagées pour accueillir les buses de pulvérisation (1), ledit corps (2) étant également muni de forages pour l'installation de nucléateurs (20) alimentés en eau sous pression en même temps que les buses (1), et en air sous pression, lesquels nucléateurs (20) se présentent sous la forme de cartouches vissées à l'extrémité desdits forages.Spraying device according to claim 8, characterized in that it comprises a monobloc body (2) provided with drillings forming the chambers (3) of pressurized water inlet, which chambers are arranged to receive the spray nozzles ( 1), said body (2) also being provided with boreholes for the installation of nucleators (20) supplied with pressurized water at the same time as the nozzles (1), and with pressurized air, which nucleators (20) are present in the form of cartridges screwed to the end of said boreholes.
EP03291804A 2002-07-31 2003-07-21 Water spraying device producing a hollow thin-walled jet for making artificial snow Expired - Fee Related EP1386668B1 (en)

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FR0209720A FR2843051B1 (en) 2002-07-31 2002-07-31 DEVICE FOR SPRAYING WATER IN THE FORM OF A THIN WALL HOLLOW JET FOR ARTIFICIAL SNOW FORMATION
FR0209720 2002-07-31

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EP1386668A1 true EP1386668A1 (en) 2004-02-04
EP1386668B1 EP1386668B1 (en) 2010-02-03

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AT (1) ATE456982T1 (en)
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* Cited by examiner, † Cited by third party
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FR2877076A1 (en) * 2004-10-27 2006-04-28 Snowstar Artificial snow producing device e.g. snow gun, has head with main supply pipe extending along head`s height and secondary pipes connecting fluid outlets to main pipe, and valve inserted between each outlet having two nozzles, and main pipe
WO2008114287A1 (en) * 2007-03-16 2008-09-25 Weisser Wolf S.R.L. Spray head for the production of artificial snow
EP2071258A1 (en) * 2007-12-14 2009-06-17 Bächler Top Track AG Nucleator nozzle, use of a nucleator nozzle, snow cannon, snow blower and method for producing ice nuclei and artificial snow
CA2736760C (en) 2008-09-25 2018-10-30 Sno Tek P/L Flat jet fluid nozzles with adjustable droplet size including fixed or variable spray angle
US9631855B2 (en) 2011-03-22 2017-04-25 Mitchell Joe Dodson Modular dual vector fluid spray nozzles
CN104903664B (en) 2012-08-29 2018-02-27 斯诺逻辑股份有限公司 Single-stage and multistage snow-cannon
CA2907404C (en) 2013-03-15 2020-10-06 Snow Logic, Inc. Nucleator for generating ice crystals for seeding water droplets in snow-making systems
US10508806B2 (en) * 2016-05-05 2019-12-17 Nihon Koso Co., Ltd. Spray nozzle assembly for steam-desuperheating, steam-desuperheating device using same, and method of steam-desuperheating using same
CN114433372A (en) * 2022-02-17 2022-05-06 安徽理工大学 Dust fall nozzle for underground coal mine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2278407A1 (en) 1974-07-15 1976-02-13 Command Engineering Internal L SNOW MAKING DEVICE
US5090619A (en) * 1990-08-29 1992-02-25 Pinnacle Innovations Snow gun having optimized mixing of compressed air and water flows
WO1994010516A1 (en) * 1992-11-04 1994-05-11 Louis Handfield Snowmaking gun
JPH0975808A (en) * 1995-09-06 1997-03-25 Shozo Iwamura Fountain device
FR2743872A1 (en) 1996-01-22 1997-07-25 York Neige Water spray nozzle support, e.g. for use in making artificial snow
WO1999000258A1 (en) 1997-06-27 1999-01-07 Karl Carey A decorator's tool

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3979061A (en) * 1974-02-04 1976-09-07 Kircher Everett F Method and apparatus for making artificial snow
US3908903A (en) * 1974-02-11 1975-09-30 Jr Samuel L Burns Snow making apparatus and method
FR2454593A1 (en) * 1979-04-20 1980-11-14 York Sa Froid Indl HIGH PRESSURE APPARATUS FOR PRODUCING ARTIFICIAL SNOW WITH ADJUSTMENT OF THE AIR / WATER MIXTURE ACCORDING TO THE WET TEMPERATURE OF THE AMBIENT AIR
US4682729A (en) * 1985-06-03 1987-07-28 The Dewey Electronics Corporation Snowmaking machine with compressed air driven reaction fan
US4742959A (en) * 1986-11-20 1988-05-10 Killington Ltd. Snow gun

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2278407A1 (en) 1974-07-15 1976-02-13 Command Engineering Internal L SNOW MAKING DEVICE
US5090619A (en) * 1990-08-29 1992-02-25 Pinnacle Innovations Snow gun having optimized mixing of compressed air and water flows
WO1994010516A1 (en) * 1992-11-04 1994-05-11 Louis Handfield Snowmaking gun
JPH0975808A (en) * 1995-09-06 1997-03-25 Shozo Iwamura Fountain device
FR2743872A1 (en) 1996-01-22 1997-07-25 York Neige Water spray nozzle support, e.g. for use in making artificial snow
WO1999000258A1 (en) 1997-06-27 1999-01-07 Karl Carey A decorator's tool

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 07 31 July 1997 (1997-07-31) *

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* Cited by examiner, † Cited by third party
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WO2011051836A2 (en) 2009-10-27 2011-05-05 Koninklijke Philips Electronics N.V. Fluid flow control apparatus and method and patient interface device employing same
WO2011051836A3 (en) * 2009-10-27 2011-06-23 Koninklijke Philips Electronics N.V. Fluid flow control apparatus and method and patient interface device employing same
AU2010311013B2 (en) * 2009-10-27 2014-11-06 Koninklijke Philips Electronics N.V. Fluid flow control apparatus and method and patient interface device employing same
WO2014195792A1 (en) * 2013-06-05 2014-12-11 Toyota Jidosha Kabushiki Kaisha Press apparatus and spray nozzle
US10434559B2 (en) 2013-06-05 2019-10-08 Toyota Jidosha Kabushiki Kaisha Press apparatus and spray nozzle
EP2846115A1 (en) 2013-08-26 2015-03-11 Technoalpin France Device for producing artificial snow, and method for producing artificial snow
EP3614077A1 (en) * 2018-08-22 2020-02-26 Innosnow AB A nozzle for a snowmaking apparatus, a snow lance head and a method for producing a slitted hollow cone spray
EP3819566A1 (en) 2019-11-07 2021-05-12 Technoalpin France Spraying device for the production of artificial snow and method for implementing same
FR3103030A1 (en) 2019-11-07 2021-05-14 Technoalpin France Spraying device for the production of artificial snow and its method of implementation
CN114945414A (en) * 2019-12-05 2022-08-26 泰科消防产品有限合伙公司 Fire suppression system including nozzles with multiple spray angles

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US6994278B2 (en) 2006-02-07
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ATE456982T1 (en) 2010-02-15
EP1386668B1 (en) 2010-02-03
US20040112976A1 (en) 2004-06-17

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