EP0914871A2 - Zerstäubungsdüse - Google Patents

Zerstäubungsdüse Download PDF

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Publication number
EP0914871A2
EP0914871A2 EP98308944A EP98308944A EP0914871A2 EP 0914871 A2 EP0914871 A2 EP 0914871A2 EP 98308944 A EP98308944 A EP 98308944A EP 98308944 A EP98308944 A EP 98308944A EP 0914871 A2 EP0914871 A2 EP 0914871A2
Authority
EP
European Patent Office
Prior art keywords
air cap
fluid tip
mating surface
spray nozzle
mating
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.)
Withdrawn
Application number
EP98308944A
Other languages
English (en)
French (fr)
Other versions
EP0914871A3 (de
Inventor
Paul Lawrence Garlick
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.)
ITW Ltd
Original Assignee
ITW Ltd
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 ITW Ltd filed Critical ITW Ltd
Publication of EP0914871A2 publication Critical patent/EP0914871A2/de
Publication of EP0914871A3 publication Critical patent/EP0914871A3/de
Withdrawn legal-status Critical Current

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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
    • B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge
    • 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
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
    • B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet

Definitions

  • This invention relates to an improved spray nozzle and more particularly to an air-atomised round spray.
  • An aim of the present invention is to provide an improved spray nozzle to spray large round spray patterns without the need for electrostatic technology.
  • a spray nozzle comprising a fluid-tip and an aircap, wherein a plurality of tangential slots angled to the outer circumference of the nozzle are located at the interface between the fluid-tip and aircap.
  • the tangential slots are formed in the fluid-tip and mate with a cone-shaped face on the air cap.
  • the tangential slots may be formed in the aircap and mate with a cone-shaped face on the fluid tip.
  • a ring-shaped member interfaces with the fluid-tip and aircap, the tangential slots being formed in the interface between the ring-shaped member and one of the nozzle members. Conveniently, the tangential slots are formed in the ring-shaped member.
  • the ring-shaped member or indeed the aircap may be made of a relatively soft material, i.e., moulded from acetal.
  • the interface between the fluid-tip and aircap may be cone-shaped.
  • the interface between the fluid-tip and aircap is formed by a ball and cone mating surfaces.
  • the spray nozzle comprises a fluid tip 1 and an aircap 2 which can be fitted onto any suitably threaded conventional or HVLP (High Volume Low Pressure) spray gun (not shown).
  • HVLP High Volume Low Pressure
  • the interior of such a spray head has atomising-air flow passages which are blanked-off by the back face 8 on the fluid tip 1, and the total air flow is directed through what would normally be the fan-air section.
  • the air-flow is directed through tangential slots 3 angled to the outer circumference of the nozzle.
  • the air-flow emerges from the slots 3 as a spinning vortex into the inside surface 4 of the aircap 2. This spinning vortex is accelerated towards the aircap exit 5 by the decreasing cross-sectional area in the path of the air-flow.
  • the liquid jet is broken up and is flung outwards by the spinning air jet. It is the radial air velocity component that produces a large diameter round spray pattern.
  • the fluid tip 1 is formed with the tangential slots 3 and the aircap 2 has a male cone 7.
  • the tangential slots 3 are formed in the aircap 2 and the male cone 9 is formed on the fluid-tip 1. This is believed to aid production of the nozzle.
  • a ring-shaped member 11 which interfaces with the fluid-tip 1 and the aircap 2 has the tangential slots 3 located on either side of the ring-shaped member which slots mate with a smooth cone-shaped face.
  • the tangential slots 3 are shown mating with the air cap.
  • the interfacing member of the three piece nozzle may be manufactured from a relatively soft mouldable material such as acetal.
  • a further modification of the nozzle would be to replace the cone-to-cone mating surfaces with ball and cone mating surfaces.
  • the typical air-atomised round spray pattern would be approximately 8 inches (203 mm) in diameter when the spray gun nozzle is held at a distance of 7 to 8 inches (178-203 mm) from the workpiece.
  • Prototypes of the improved spray nozzle have sprayed patterns of up to 9 inches (229 mm) in diameter when the spray gun nozzle is held at a spraying distance of 12 inches (305 mm) from the workpiece.

Landscapes

  • Nozzles (AREA)
EP98308944A 1997-11-05 1998-11-02 Zerstäubungsdüse Withdrawn EP0914871A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9723535A GB2331031A (en) 1997-11-05 1997-11-05 An improved spray nozzle
GB9723535 1997-11-05

Publications (2)

Publication Number Publication Date
EP0914871A2 true EP0914871A2 (de) 1999-05-12
EP0914871A3 EP0914871A3 (de) 2000-05-10

Family

ID=10821718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98308944A Withdrawn EP0914871A3 (de) 1997-11-05 1998-11-02 Zerstäubungsdüse

Country Status (4)

Country Link
EP (1) EP0914871A3 (de)
JP (1) JPH11197551A (de)
CA (1) CA2252318A1 (de)
GB (1) GB2331031A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MXPA02012719A (es) * 2000-07-06 2003-04-25 Lancer Partnership Ltd Metodo y aparato para tratamiento de fluidos.
SE525307C2 (sv) * 2003-06-30 2005-01-25 Baldwin Jimek Ab Lufthuv
CN111249496B (zh) * 2020-03-18 2021-01-22 湖南翰坤实业有限公司 一种智能雾化消毒器

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1581759A (en) * 1924-09-13 1926-04-20 Albert W Morse Nebulizer
GB858948A (en) * 1957-09-17 1961-01-18 Dowty Fuel Syst Ltd Improvements in liquid spray nozzles
AT261087B (de) * 1963-07-31 1968-04-10 Gulf Research Development Co Brennerdüse
DE1577859B2 (de) * 1965-08-26 1978-05-03 Ernst Mueller Kg, 7151 Hoefen Spritzpistole
DE2012941A1 (de) * 1969-04-01 1970-10-15 Parker-Hannifin Corp., Cleveland, Ohio (V.St.A.) Einspritzdüse für flüssigen Kraftstoff
JPS5710011A (en) * 1980-06-23 1982-01-19 Shigetaka Tamai Combustion method and device therefore
EP0244204A1 (de) * 1986-04-28 1987-11-04 Western Packaging Systems Limited Niederdruck-Zerstäubungsdüse
US5499768A (en) * 1989-05-31 1996-03-19 Ohkawara Kakohki Co., Ltd. Spray nozzle unit
US5228624A (en) * 1992-03-02 1993-07-20 Mensink Daniel L Swirling structure for mixing two concentric fluid flows at nozzle outlet
FR2688711A1 (fr) * 1992-03-20 1993-09-24 Oreal Buse de distribution.
US5560544A (en) * 1994-07-01 1996-10-01 The Procter & Gamble Company Anti-clogging atomizer nozzle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
GB9723535D0 (en) 1998-01-07
EP0914871A3 (de) 2000-05-10
GB2331031A (en) 1999-05-12
JPH11197551A (ja) 1999-07-27
CA2252318A1 (en) 1999-05-05

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