EP0341145A1 - Luftzerstäubungsgerät für Flüssigkeiten - Google Patents

Luftzerstäubungsgerät für Flüssigkeiten Download PDF

Info

Publication number
EP0341145A1
EP0341145A1 EP89401231A EP89401231A EP0341145A1 EP 0341145 A1 EP0341145 A1 EP 0341145A1 EP 89401231 A EP89401231 A EP 89401231A EP 89401231 A EP89401231 A EP 89401231A EP 0341145 A1 EP0341145 A1 EP 0341145A1
Authority
EP
European Patent Office
Prior art keywords
air
channels
air ejection
ejection channels
channel
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
EP89401231A
Other languages
English (en)
French (fr)
Other versions
EP0341145B1 (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
Priority date (The priority date 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 date listed.)
Filing date
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
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter

Definitions

  • the 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 of 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 advisable to correct these variations by reducing in parallel the spraying air flow and consequently 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 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 characteristic parameters of the beam relatively independent of each other.
  • the invention therefore relates to a pneumatic liquid spraying device comprising a spray nozzle in the center of which is arranged a liquid ejection channel and further comprising spray air ejection channels and at at least one drive air ejection channel formed coaxially and parallel to said liquid ejection channel and opening onto a front face of said nozzle, characterized in that said spray air ejection channels opening onto said front face, said drive air ejection channel is independent of the others channels mentioned and is arranged to be supplied with compressed air by a specific air source at a pressure generally different from that (s) of the other cited 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 liquid spraying device 11 comprises a body 12 of which an approximately cylindrical part has been shown and in which are defined a number of conduits capable of being placed in communication with a liquid inlet 13 (in particular paint or varnish ), a first compressed air inlet 14 and a second compressed air inlet 15.
  • a spray nozzle 16 is fixed to one end of the body 12, by means of a threaded sleeve 17.
  • the liquid inlet 13 is here represented by a conduit which opens into a chamber 13 a ; this duct is connected to a source of pressurized liquid, not shown.
  • the body 12 houses an air control needle 18 slidably mounted along an axis x′x. It should be noted that the three chambers 13 a , 14 a , 15 a are aligned along this axis which is also the axis of ejection of the liquid.
  • the needle 18 has two frustoconical bearing surfaces 14 b , 15 b controlling the communication of the chambers 14 a , 15 a with air distribution ducts 20, 21, respectively.
  • a paint control needle 22 is also slidably mounted along the axis x′x. It moves partly in the needle 18 and partly in the body 12. It controls the connection of the chamber 13 a with a paint distribution conduit 25 defined axially (always along the axis x′x in an insert 26.
  • the latter is interposed axially between one end of the body 12 and the spray nozzle 16 and is screwed into a threaded part of said body.
  • a liquid spray nozzle 28 terminated by a liquid ejection channel 30 which projects through the spray nozzle, in the center thereof.
  • the axis of this channel is of course, the x′x axis.
  • the spray nozzle has two horns 35, symmetrical with respect to the axis x′x, parallel and projecting on the sides of a front face 36, substantially circular, at the center of which opens the liquid ejection channel 30 , through an orifice 30 a .
  • Air ejection channels are provided in the spray nozzle.
  • a drive area ejection channel 38 of annular section and arranged coaxially and parallel to the liquid ejection channel 30.
  • This channel 38 therefore opens, through an annular orifice 38 a on the circular face 36; of course, this single annular channel could be replaced by several channels parallel to channel 30 and distributed regularly over a cylindrical surface, - Spray air ejection channels 39, oblique to the axis x′x and whose ejection axes converge at A on this axis, downstream of the orifice 30 a , with respect to the direction ejecting the liquid; the orifices 39 a of these channels also open onto the circular face 36, - Air ejection channels of conformation of the beam 40, formed in the horns 35, oblique with respect to the axis x′x and arranged in pairs; they are located in a plane P, containing the axis x′x and the orifices 40 a
  • 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 in 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 made 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)
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
FR8805926A FR2630930B1 (fr) 1988-05-03 1988-05-03 Dispositif de pulverisation pneumatique de liquide
FR8805926 1988-05-03

Publications (2)

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

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5421921A (en) * 1992-07-08 1995-06-06 Nordson Corporation Segmented slot die for air spray of fibers
ES2115700T3 (es) * 1992-07-08 1998-07-01 Nordson Corp Aparato y procedimientos para la aplicacion de coberturas discretas.
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
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
US6267301B1 (en) 1999-06-11 2001-07-31 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
US7114910B2 (en) 2003-01-24 2006-10-03 Turbotect Ltd. Method and injection nozzle for interspersing a gas flow with liquid droplets
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
TW200536612A (en) * 2004-03-26 2005-11-16 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
WO2008096501A1 (ja) 2007-02-08 2008-08-14 Abb K.K. エア霧化型塗装装置
US8297530B2 (en) * 2007-09-21 2012-10-30 Spraying Systems Co. Ultrasonic atomizing nozzle with variable fan-spray feature
US8104694B2 (en) * 2008-02-05 2012-01-31 Chih-Yuan Yang Air spray gun
US9790132B2 (en) 2012-03-09 2017-10-17 Halliburton Energy Services, Inc. Set-delayed cement compositions comprising pumice and associated methods
US10082001B2 (en) 2012-03-09 2018-09-25 Halliburton Energy Services, Inc. Cement set activators for cement compositions 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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE434163A (de) *
FR1524334A (fr) * 1967-03-31 1968-05-10 Prosyn Appareil perfectionné pour la pulvérisation de tous liquides
EP0224066A2 (de) * 1985-11-26 1987-06-03 Binks Manufacturing Company Spritzpistole zum pneumatischen Zerstäuben

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2070696A (en) * 1935-12-11 1937-02-16 Vilbiss Co Spray head
US2646314A (en) * 1950-10-19 1953-07-21 Vilbiss Co Spray nozzle
US4501394A (en) * 1983-05-09 1985-02-26 Graco Inc. Spray gun air cap and method of making
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE434163A (de) *
FR1524334A (fr) * 1967-03-31 1968-05-10 Prosyn Appareil perfectionné pour la pulvérisation de tous liquides
EP0224066A2 (de) * 1985-11-26 1987-06-03 Binks Manufacturing Company Spritzpistole zum pneumatischen Zerstäuben

Also Published As

Publication number Publication date
FR2630930A1 (fr) 1989-11-10
DE68901951T2 (de) 1992-12-24
EP0341145B1 (de) 1992-07-01
FR2630930B1 (fr) 1990-11-02
US4961536A (en) 1990-10-09
DE68901951D1 (de) 1992-08-06
JPH01317563A (ja) 1989-12-22

Similar Documents

Publication Publication Date Title
EP0341145B1 (de) Luftzerstäubungsgerät für Flüssigkeiten
EP0240377B1 (de) Vorrichtung zur Zerstäubung einer Flüssigkeit
EP0125966B1 (de) Farbspritzvorrichtung
US5178330A (en) Electrostatic high voltage, low pressure paint spray gun
FR2488153A1 (fr) Buse a haut rendement
EP1480756B2 (de) Rotationszerstäuber für beschichtungsmittel
FR2518428A1 (fr) Buse d'atomisation pour pistolet de pulverisation
CH620842A5 (de)
EP3479906B1 (de) Sprühdüse mit verengung zur vor-atomisierung, und sprühkopf sowie sprühvorrichtung, die eine solche düse umfasst
FR2940923A1 (fr) Appareil de brumisation a injecteur a fractionnement
US4860955A (en) Spraying equipment with rotatable cap for adjusting flowrate
EP3871792A1 (de) Sprühdüse mit flachem strahl und geringer abdrift
EP2119508B1 (de) Druckknopf mit konvergierenden Verteilungskanälen
EP0364311B1 (de) Luftzerstäubergerät für Flüssigkeiten mit flachem Spritzstrahl
EP0630690B1 (de) Pneumatischer Flachstrahlzerstauber zum Versprühen von Beschichtungsmaterialien
FR2787352A1 (fr) Dispositif de pulverisation de gouttelettes muni d'un tube d'extraction
FR2587631A1 (fr) Dispositif de reglage du debit de l'air dans un pistolet a peinture
WO1994006569A1 (fr) Appareil de pulverisation lineaire d'un liquide, notamment de refroidissement
EP1071879B1 (de) Schrägstrahlzerstäuber für einspritzventil einer fremdgezündeten brennkraftmaschine mit direkteinspritzung
FR2522991A1 (fr) Appareil de pulverisation pneumatique de liquide sous forme d'un jet
EP0674946A1 (de) Düse für Flüssigkeitszerstäubung
FR2510008A1 (fr) Atomiseur, notamment pour refroidir dans le sens de sa largeur un produit coule en continu
FR2547215A1 (fr) Pulverisateur transversal de liquide au moyen d'air comprime
BE601806A (de)
CH321440A (fr) Gicleur pour combustible liquide

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE ES GB IT LI NL SE

17P Request for examination filed

Effective date: 19891219

17Q First examination report despatched

Effective date: 19901221

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE ES GB IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19920701

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19920701

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19920701

Ref country code: NL

Effective date: 19920701

REF Corresponds to:

Ref document number: 68901951

Country of ref document: DE

Date of ref document: 19920806

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19930428

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19930430

Ref country code: LI

Effective date: 19930430

Ref country code: CH

Effective date: 19930430

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BERE Be: lapsed

Owner name: S.A. SAMES

Effective date: 19930430

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19930428

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940101