EP0674946A1 - Düse für Flüssigkeitszerstäubung - Google Patents

Düse für Flüssigkeitszerstäubung Download PDF

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Publication number
EP0674946A1
EP0674946A1 EP95490012A EP95490012A EP0674946A1 EP 0674946 A1 EP0674946 A1 EP 0674946A1 EP 95490012 A EP95490012 A EP 95490012A EP 95490012 A EP95490012 A EP 95490012A EP 0674946 A1 EP0674946 A1 EP 0674946A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
fraction
upstream
channel
intersections
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
EP95490012A
Other languages
English (en)
French (fr)
Other versions
EP0674946B1 (de
Inventor
Arnold Thomas Delaney
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.)
PROSIGN SA
Original Assignee
PROSIGN 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 PROSIGN SA filed Critical PROSIGN SA
Publication of EP0674946A1 publication Critical patent/EP0674946A1/de
Application granted granted Critical
Publication of EP0674946B1 publication Critical patent/EP0674946B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B05B1/04—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 flat form, e.g. fan-like, sheet-like
    • B05B1/042—Outlets having two planes of symmetry perpendicular to each other, one of them defining the plane of the jet

Definitions

  • the invention relates to a nozzle for spraying a liquid substance.
  • nozzles There are mainly two types of nozzles which are distinguished by the shape of the jet of the liquid which they project.
  • the object of the invention relates more particularly to the nozzles providing at the outlet a flat jet.
  • this nozzle finds application in the marking on the ground of signaling strips.
  • Said nozzle which then forms part of an installation carried by a machine which moves parallel to the strip, is arranged so that the liquid projection surface has its length which corresponds to the width of the strip.
  • the head is generally hemispherical (FR-A-2546080, FR-A-2637819), but also it can have a frustoconical surface (FR-A-2303603, FR-A-2361944).
  • the internal wall of this downstream fraction is similar to a hemispherical wall.
  • the nozzle is formed by a transverse groove which, in the case of nozzles with flat jets, gives the nozzle in axial view substantially the shape of a cat's eye.
  • the quality of the projection depends on many parameters that must be integrated to obtain a high-performance nozzle.
  • These parameters are, for example, the shape of the nozzle, the type of fluid, its viscosity as a function of the temperature, the nature of the flow, etc.
  • a nozzle is known (US-A-2,985,386) whose generator of the internal wall of the so-called downstream fraction which extends the upstream fraction of said channel is determined to define a chamber in the shape of an ogive.
  • the nozzle is formed by a transverse V-shaped groove delimited by two V-notches communicating with each other and each extending over half the width of the nozzle and the intersections of the planes delimiting said notches in Vee are symmetrically to the axis slightly inclined with respect to each other.
  • the invention relates to a spray nozzle of the aforementioned type, in particular characterized in that the intersections converge towards the distal end of the nozzle.
  • the material 1 sprays a liquid substance 2 on a receiving surface 3.
  • This spraying material comprises a reserve 4 of liquid substance to be projected and projection means 5.
  • These projection means 5 comprise at least one spray nozzle 6, a circuit 7 for supplying liquid to the aforementioned nozzles and at least one pump 8 for supplying the fluid from the reserve 4 to the nozzles 6.
  • the nozzle 12 is formed by a transverse groove 13 which has a shape defined as a function of the type of jet to be generated.
  • this groove gives the nozzle, in axial view, a cat eye shape.
  • the axial channel 10 is a cylindrical cavity of revolution with a section which, from its upstream end, is constant over a fraction 14 of its length, called the upstream fraction 14, then gradually decreases according to a predetermined profile to connect to the nozzle.
  • the generator 15 of the internal wall of the so-called downstream fraction 16 which extends the upstream fraction 14 of said channel is determined to define a chamber 17 in the form of a warhead.
  • the radius of the warhead of this wall and the section of the channel in its upstream part are determined to balance the forces due to the shear rate of the substance to be sprayed.
  • the external wall of the head of the nozzle also has a shape of a warhead and the groove 13 delimiting the nozzle has a V-shaped section.
  • the branches of the Vee delimit between them an angle of the order of 45 °.
  • the pointed shape of the inner wall and the outer wall is very interesting because it multiplies the possibilities of adjusting the nozzles.
  • said nozzle is delimited by two notches 13A, 13B in V communicating with each other and each extending over half the width of the nozzle and whose intersections 18 of the planes delimiting said Vee notches are symmetrically to the axis slightly inclined with respect to one another, according to the invention, the intersections 18 of these planes converge towards the distal end of the nozzle.

Landscapes

  • Nozzles (AREA)
  • Fuel-Injection Apparatus (AREA)
EP95490012A 1994-03-28 1995-03-15 Düse für Flüssigkeitszerstäubung Expired - Lifetime EP0674946B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9404054 1994-03-28
FR9404054A FR2717712B1 (fr) 1994-03-28 1994-03-28 Buse de pulvérisation d'une substance liquide.

Publications (2)

Publication Number Publication Date
EP0674946A1 true EP0674946A1 (de) 1995-10-04
EP0674946B1 EP0674946B1 (de) 1998-07-08

Family

ID=9461801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95490012A Expired - Lifetime EP0674946B1 (de) 1994-03-28 1995-03-15 Düse für Flüssigkeitszerstäubung

Country Status (4)

Country Link
EP (1) EP0674946B1 (de)
AT (1) ATE168044T1 (de)
DE (1) DE69503280D1 (de)
FR (1) FR2717712B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012024228A3 (en) * 2010-08-16 2013-02-28 Airgard, Inc. Momentum transfer using liquid injection
EP3218116A4 (de) * 2014-11-10 2018-06-20 dlhBowles Inc. Sprühdüse für hochviskose (z. b. öl) sprühbeschichten mit gleichmässiger sprühverteilung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH351910A (de) * 1956-02-25 1961-01-31 Lechler Paul Fa Flachstrahldüse
US2985386A (en) * 1958-07-18 1961-05-23 William F Steinen Spray nozzle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH351910A (de) * 1956-02-25 1961-01-31 Lechler Paul Fa Flachstrahldüse
US2985386A (en) * 1958-07-18 1961-05-23 William F Steinen Spray nozzle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012024228A3 (en) * 2010-08-16 2013-02-28 Airgard, Inc. Momentum transfer using liquid injection
US8771407B2 (en) 2010-08-16 2014-07-08 Kristian E. Johnsgard Momentum transfer using liquid injection
EP3218116A4 (de) * 2014-11-10 2018-06-20 dlhBowles Inc. Sprühdüse für hochviskose (z. b. öl) sprühbeschichten mit gleichmässiger sprühverteilung
US10493470B2 (en) 2014-11-10 2019-12-03 Dlhbowles, Inc. Spray nozzle for high viscosity spray applications with uniform spray distribution

Also Published As

Publication number Publication date
DE69503280D1 (de) 1998-08-13
EP0674946B1 (de) 1998-07-08
FR2717712A1 (fr) 1995-09-29
FR2717712B1 (fr) 1996-05-15
ATE168044T1 (de) 1998-07-15

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