EP0341145B1 - Luftzerstäubungsgerät für Flüssigkeiten - Google Patents

Luftzerstäubungsgerät für Flüssigkeiten Download PDF

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Publication number
EP0341145B1
EP0341145B1 EP89401231A EP89401231A EP0341145B1 EP 0341145 B1 EP0341145 B1 EP 0341145B1 EP 89401231 A EP89401231 A EP 89401231A EP 89401231 A EP89401231 A EP 89401231A EP 0341145 B1 EP0341145 B1 EP 0341145B1
Authority
EP
European Patent Office
Prior art keywords
air ejection
air
ducts
liquid
duct
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.)
Expired - Lifetime
Application number
EP89401231A
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English (en)
French (fr)
Other versions
EP0341145A1 (de
Inventor
Jean-Yves Correard
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.)
Sames SA
Original Assignee
Sames SA
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Publication date
Application filed by Sames SA filed Critical Sames SA
Publication of EP0341145A1 publication Critical patent/EP0341145A1/de
Application granted granted Critical
Publication of EP0341145B1 publication Critical patent/EP0341145B1/de
Anticipated expiration legal-status Critical
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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
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter

Definitions

  • the invention relates to a pneumatic liquid spraying device, in particular for applying paint or varnish; its main purpose is to obtain a better conformation of the beam of sprayed liquid and a greater ease of adjustment of the characteristics of this beam, making it possible to quickly adapt the latter to changes or variations in the conditions of flow rate, temperature and viscosity liquid to be sprayed.
  • a device for spraying liquid using compressed air both to transform the liquid into a bundle of fine particles and to give this bundle a desired shape, more particularly a relatively flat fan shape, of cross section d thickness as constant as possible.
  • Such a device is, for example, described in US Patent No. 2,646,314.
  • This prior device comprises a spray nozzle at the center of which are arranged a liquid ejection channel and a drive air ejection channel , annular and coaxial with said liquid ejection channel.
  • the nozzle has a number of air ejection channels which, by virtue of their respective main functions will be called atomizing air ejection channels and beam shaping air ejection channels.
  • Said spraying area ejection channels are arranged symmetrically on either side of the axis of the liquid ejection channel and converge towards a point on this axis (which will be called for convenience "spraying point” ) located downstream of the liquid ejection orifice, to disperse the liquid jet in fine droplets.
  • Said shaping air channels are also arranged symmetrically on either side of this axis and converge two by two towards the latter, downstream of the spray point, that is to say towards a location where the jet liquid is already sprayed. To do this, these channels are formed in two horns projecting from the surface of the nozzle on which the liquid ejection channel opens. These horns are symmetrical with respect to the axis of the channel.
  • the action of the "conformation area” is therefore to flatten the beam of sprayed liquid to give it the desired fan shape.
  • at least all of the channels opening onto the face of the nozzle in the center of which is the orifice of said liquid ejection channel are supplied from the same source of compressed air.
  • the internal orifices of these channels all open into the same annular cavity arranged around the liquid ejection channel and connected to a compressed air inlet.
  • the conformation air ejection channels, located in the horns, are generally supplied separately, that is to say connected to another supply of compressed air, of a different pressure.
  • the air ejected by the horns mainly makes it possible to adjust the width of the flat jet while the air ejected by the drive channels and the spray channels acts on another important parameter, namely the fineness spray.
  • the actions of all these air jets interfere, which makes adjustments difficult, long and tedious.
  • the fan beam may be thinned, or even cut in the center, where the action of air from the horns is predominant and on the other hand, the spray becomes finer. It is therefore necessary to correct these variations by reducing in parallel the spraying air flow and consequently reaches the driving air flow, which has new consequences on the shape of the beam and therefore obliges the operator to proceed. by successive approaches.
  • the Belgian patent document BE-A-434 163 describes a spraying device comprising only two annular and coaxial air ejection channels, one for spraying the liquid and the other for driving. These two conduits can be supplied separately, but this arrangement does not allow a beam of sprayed liquid to be obtained in the form of a fan.
  • the invention results from the observation that, in this type of device, the spraying air also contributes to the conformation of the sprayed beam and to the distribution of the sprayed liquid, transverse to the axis of the beam (ie ie in the "plane" of the fan) while the drive air has practically no effect on these parameters.
  • the drive air intervenes directly on the forward speed component, communicated to the particles of the sprayed liquid and therefore on the opening of the fan. Consequently, the invention proposes modifications in the supply of the various air ejection channels defined above in order to make the settings of the main parameters characteristic of the beam. relatively independent of each other.
  • the invention therefore relates to a pneumatic liquid spraying device comprising a spray nozzle at the center of which is arranged a liquid ejection channel and further comprising at least one spray air ejection channel, and at least a drive air ejection channel arranged parallel and coaxially to said liquid ejection channel and opening onto a front end face of said nozzle onto which said liquid ejection channel also opens, characterized in that it further comprises beam-shaping air ejection channels, in that said atomizing air ejection channels open on said front end face radially outside the orifice of said ejection channel drive air and extend obliquely towards the axis of said liquid ejection channel and in that said drive air ejection channel is independent of the other cited channels and is arranged for r be supplied with compressed air by a specific air source at a pressure generally different from that (s) of the other mentioned air ejection channels.
  • the invention consists first of all in dissociating the setting of the supply air of the drive air ejection channel from the other settings. This can therefore lead, in accordance with the invention, to providing three sources of compressed air at different pressures which can be adjusted independently of one another: a source of air for said drive air ejection channel, a source air for said atomizing air ejection channels and an air source for said beam shaping air ejection channels, that is to say the air ejected by the aforementioned horns.
  • the invention however particularly relates to an embodiment where the number of compressed air sources is limited to two, which allows, on the one hand, to connect the device to conventional and / or pre-existing installations and, on the other hand, to further facilitate adjustments while unexpectedly improving performance.
  • said beam-shaping air is dependent on the atomizing air.
  • the invention therefore also relates to a device according to the above definition, characterized in that said spray air ejection channels and said beam shaping air ejection channels communicate.
  • the plane PM containing the axis x'x and perpendicular to the plane P is defined as being the desired median plane of the fan beam 45 of sprayed liquid.
  • the air ejection channels mentioned above, in particular channels 39 and 40 carry for convenience the names that they are conventionally given although the analysis developed above tends to demonstrate that their action is significantly more complex.
  • the drive air ejection channel 38 (or the channels fulfilling this function) is independent of the others and designed to be supplied with compressed air at a pressure generally different from that (s ) other air ejection channels.
  • said spray air ejection channels 39 and said conformation air ejection channels 40 and 41 communicate.
  • the internal orifices of the channels 40 open into conduits 48 formed in the horns 35, and communicate with said first air inlet 14 (via an annular chamber 49 defined between the insert 26 and the sleeve 17 and into which opens the conduit 20), the internal orifices of the channels 39 and 41 open into a first cavity 50 defined in the spray nozzle and the conduits 48 communicate with the cavity 50 by holes 52 formed obliquely in the horns 35.
  • the internal orifice of the drive air ejection channel opens into a second cavity 55 in communication with said second compressed air inlet 15, via an annular chamber 56 defined at the junction of the spray nozzle 16 and of the insert 26, of the channels 57 made through the insert 26, another annular chamber 58 defined at the junction of the insert 26 and of the body 12, the channel 21 opening into this chamber 58.
  • This second cavity 55 is partially delimited by a part of revolution 60 of generally conical shape, inserted between the spray nozzle 16 and the insert 26.
  • This part of revolution 60 forms a partition wall between said first cavity 50 and said second cavity 55.
  • C ' is the presence of this part which makes it possible to "dissociate" the drive air from the spraying air and / or conformation.
  • the use of the device which has just been described is very different from that of known devices and in particular the adjustments are simpler and faster.
  • the fineness of spraying only depends on the adjustment of the air flow rate coming from the conformation air ejection channels 40 and 41 and the spray air channels 39, that is to say the setting of the air pressure applied to the air inlet 14.
  • the shape of the beam is practically determined and “stabilized” by construction by suitably choosing the sections of the different air ejection channels.
  • the opening of the fan is, for its part, directly regulated by the air flow rate coming from the drive channel 38. This adjustment can be carried out independently of the others and no variation in the other parameters of the spray. This adjustment is therefore done simply by acting on the air pressure applied to the air inlet 15.

Landscapes

  • Nozzles (AREA)

Claims (7)

1. Vorrichtung zum pneumatischen Zerstäuben von Flüssigkeit, mit einer Zerstäuberdüse (16), in deren Mitte sich ein Flüssigkeitsausstoßkanal befindet und die außerdem mindestens einen Zerstäuberluftausstoßkanal (39) umfaßt, sowie mindestens einen Antriebsluftausstoßkanal, der parallel und koaxial zu dem Flüssigkeitsausstoßkanal verläuft und in einer vorderen Stirnfläche der Düse mündet, in der auch der Flüssigkeitsausstoßkanal mündet, dadurch gekennzeichnet, daß sie außerdem Luftausstoßkanäle (40, 41) zur Bündelbil dung umfaßt, daß die Zerstäuberluftausstoßkanäle in der vorderen Stirnfläche radial außerhalb der Öffnung des Antriebsluftausstoßkanals münden und sich schräg auf die Achse des Flüssigkeitsausstoßkanals zu erstrecken, und daß der Antriebsluftausstoßkanal (38) unabhängig von den anderen Kanälen ist und so ausgebildet ist, daß er mit Druckluft aus einer besonderen Druckluftquelle mit einem im allgemeinen von den Drücken in den anderen Luftausstoßkanälen verschiedenen Druck versorgt wird.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Zerstäuberluftausstoßkanäle (39) und die Luftausstoßkanäle zur Bündelbildung miteinander kommunizieren.
3. Vorrichtung nach Anspruch 2, mit zwei parallelen Hörnern (35), die an den Seiten der vorderen Stirnfläche (36) der Düse vorstehen, symmetrisch zu der Achse (x'x) des Flüssigkeitsausstoßkanals angeordnet sind und die genannten Luftausstoßkanäle zur Bündelbildung enthalten, welche in einer Ebene (P) liegen, die durch die genannte Achse geht, wobei Zerstäuberluftausstoßkanäle (39) zu beiden Seiten der genannten Ebene münden und zu dieser symmetrisch sind, dadurch gekennzeichnet, daß die innenliegenden Öffnungen der Luftausstoßkanäle (40) zur Bündelbildung in Leitungen (48) münden, die mit einem ersten Druckluftanschluß (14) in Verbindung stehen, daß die innenliegenden Öffnungen der Zerstäuberluftausstoßkanäle (39) in einen ersten Hohlraum (50) münden, und daß die Leitungen (48) mit dem ersten Hohlraum über Bohrungen (42) in den Hörnern in Verbindung stehen.
4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der Antriebsluftausstoßkarial (38) mit einem zweiten Hohlraum (55) in Verbindung steht, der mit einem zweiten Druckluftanschluß (15) verbunden ist.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der zweite Hohlraum (55) teilweise von einem etwa kegeligen Drehteil (60) begrenzt ist, das zu der Zerstäuberdüse koaxial ist.
6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß das Drehteil (60) eine Trennwand zwischen dem ersten und dem zweiten Hohlraum bildet.
7. Vorrichtung nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß Schutzluftausstoßkanäle (41) mit den Luftausstoßkanälen (40) zur Bündelbildung in Verbindung stehen.
EP89401231A 1988-05-03 1989-04-28 Luftzerstäubungsgerät für Flüssigkeiten Expired - Lifetime EP0341145B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8805926 1988-05-03
FR8805926A FR2630930B1 (fr) 1988-05-03 1988-05-03 Dispositif de pulverisation pneumatique de liquide

Publications (2)

Publication Number Publication Date
EP0341145A1 EP0341145A1 (de) 1989-11-08
EP0341145B1 true EP0341145B1 (de) 1992-07-01

Family

ID=9365938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89401231A Expired - Lifetime EP0341145B1 (de) 1988-05-03 1989-04-28 Luftzerstäubungsgerät für Flüssigkeiten

Country Status (5)

Country Link
US (1) US4961536A (de)
EP (1) EP0341145B1 (de)
JP (1) JPH01317563A (de)
DE (1) DE68901951T2 (de)
FR (1) FR2630930B1 (de)

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NO171427C (no) * 1990-05-25 1993-03-10 Trallfa Robot Abb As Regulerbar styreventil for stroemningsregulering av gass eller vaeske samt anvendelse av saadan ventil
ES2115700T3 (es) * 1992-07-08 1998-07-01 Nordson Corp Aparato y procedimientos para la aplicacion de coberturas discretas.
US5421921A (en) * 1992-07-08 1995-06-06 Nordson Corporation Segmented slot die for air spray of fibers
US5322221A (en) * 1992-11-09 1994-06-21 Graco Inc. Air nozzle
US5307992A (en) * 1992-11-18 1994-05-03 Usbi Co. Method and system for coating a substrate with a reinforced resin matrix
US6267301B1 (en) 1999-06-11 2001-07-31 Spraying Systems Co. Air atomizing nozzle assembly with improved air cap
US6322003B1 (en) 1999-06-11 2001-11-27 Spraying Systems Co. Air assisted spray nozzle
US6161778A (en) * 1999-06-11 2000-12-19 Spraying Systems Co. Air atomizing nozzle assembly with improved air cap
US6685106B1 (en) 2000-11-28 2004-02-03 Efc Systems, Inc. Paint spraying device
CN100464868C (zh) 2003-01-24 2009-03-04 图柏特克有限公司 用于散布含有液滴的气流的方法及其用途、喷射喷嘴、燃气涡轮压缩机及其湿式清洁方法
US6874708B2 (en) * 2003-02-13 2005-04-05 Illinois Tool Works Inc. Automatic air-assisted manifold mounted gun
JP4409910B2 (ja) * 2003-10-31 2010-02-03 日本ペイント株式会社 スプレー塗装装置および塗装方法
WO2005097337A1 (en) * 2004-03-26 2005-10-20 Graco Minnesota Inc. Air spray gun improvements in nozzle and aircap
US7237727B2 (en) * 2004-04-13 2007-07-03 Hsing-Tzu Wang Paint spray gun
US20050263612A1 (en) * 2004-05-26 2005-12-01 Hsing-Tzu Wang Paint spray gun
US20060249289A1 (en) * 2005-05-05 2006-11-09 Halliburton Energy Services, Inc. Set-delayed cement compositions comprising hydrated lime and silica and methods of cementing in subterranean formations
JP4955709B2 (ja) * 2007-02-08 2012-06-20 Ａｂｂ株式会社 エア霧化型塗装装置
WO2009039424A1 (en) * 2007-09-21 2009-03-26 Spraying Systems Company Ultrasonic atomizing nozzle with variable fan-spray feature
US8104694B2 (en) * 2008-02-05 2012-01-31 Chih-Yuan Yang Air spray gun
US10082001B2 (en) 2012-03-09 2018-09-25 Halliburton Energy Services, Inc. Cement set activators for cement compositions and associated methods
US9790132B2 (en) 2012-03-09 2017-10-17 Halliburton Energy Services, Inc. Set-delayed cement compositions comprising pumice and associated methods
JP5935134B2 (ja) * 2012-05-18 2016-06-15 国立研究開発法人産業技術総合研究所 噴霧ノズルの構造
JP2013244429A (ja) * 2012-05-24 2013-12-09 Nissan Motor Co Ltd 塗装ハンドガン用エアキャップ
AR103483A1 (es) * 2015-02-28 2017-05-10 Halliburton Energy Services Inc Un método para pulverizar o recubrir una superficie con una composición de cemento con retardo de fraguado y sistema de cementación

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US2070696A (en) * 1935-12-11 1937-02-16 Vilbiss Co Spray head
US2646314A (en) * 1950-10-19 1953-07-21 Vilbiss Co Spray nozzle
FR1524334A (fr) * 1967-03-31 1968-05-10 Prosyn Appareil perfectionné pour la pulvérisation de tous liquides
US4501394A (en) * 1983-05-09 1985-02-26 Graco Inc. Spray gun air cap and method of making
US4650119A (en) * 1985-11-26 1987-03-17 Binks Manufacturing Company Air spray gun
FR2595059B1 (fr) * 1986-02-28 1988-06-17 Sames Sa Dispositif de pulverisation de liquide
DE3709543C2 (de) * 1987-03-24 1996-06-05 Wagner Gmbh J Vorrichtung zum Zerstäuben einer Flüssigkeit

Also Published As

Publication number Publication date
EP0341145A1 (de) 1989-11-08
US4961536A (en) 1990-10-09
DE68901951T2 (de) 1992-12-24
FR2630930A1 (fr) 1989-11-10
FR2630930B1 (fr) 1990-11-02
DE68901951D1 (de) 1992-08-06
JPH01317563A (ja) 1989-12-22

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