EP0674946B1 - Düse für Flüssigkeitszerstäubung - Google Patents

Düse für Flüssigkeitszerstäubung Download PDF

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Publication number
EP0674946B1
EP0674946B1 EP95490012A EP95490012A EP0674946B1 EP 0674946 B1 EP0674946 B1 EP 0674946B1 EP 95490012 A EP95490012 A EP 95490012A EP 95490012 A EP95490012 A EP 95490012A EP 0674946 B1 EP0674946 B1 EP 0674946B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
channel
tip
intersections
upstream
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
EP95490012A
Other languages
English (en)
French (fr)
Other versions
EP0674946A1 (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 spray nozzle of a liquid substance.
  • the object of the invention relates more particularly to the nozzles providing a flat jet output.
  • this nozzle finds application in the ground marking of strips of signage.
  • Said nozzle which then forms part of an installation carried by a machine which moves parallel to the belt, is arranged so that the projection surface of the liquid has its length which corresponds to the width of the bandaged.
  • the head is generally hemispherical (FR-A-2546080, FR-A-2637819), but also it can be on the surface frustoconical (FR-A-2303603, FR-A-2361944).
  • the internal wall of this fraction downstream is like a hemispherical wall.
  • the nozzle is formed by a transverse groove which, in the case of flat jet nozzles, gives the nozzle in axial view roughly the shape of a cat's eye.
  • the quality of the projection depends on many parameters that must be integrated to obtain a nozzle efficient.
  • a nozzle is known (US-A-2,985,386) whose generator of the inner wall of the so-called downstream fraction which extends the upstream fraction of said channel is determined to define a warp-shaped room.
  • the nozzle is formed by a groove cross section of Vee delimited by two notches in Vee communicating with each other and each extending over the half the width of the nozzle and whose intersections plans delimiting said Vee notches are symmetrically to the axis slightly inclined with respect to one to the other.
  • the invention relates to a nozzle spraying 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 equipment includes a reserve 4 of liquid substance to be projected and projection means 5.
  • projection means 5 comprise at least one nozzle 6 spraying circuit 7 for supplying liquid to the aforementioned nozzles and at least one pump 8 for supplying the fluid from reserve 4 to nozzles 6.
  • the nozzle 12 is formed by a transverse groove 13 which has a shape defined according to the type of jet to be generated.
  • this groove gives the nozzle, in axial view, a cat eye shape.
  • the axial 1O channel is a cavity cylindrical of revolution with a section which, from its upstream end, is constant over a fraction 14 of its length, called upstream fraction 14, then gradually decreases according to a predetermined profile to connect to the nozzle.
  • the generator 15 of the internal wall of fraction 16 said downstream 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 for balance the forces due to the shear rate of the substance to be sprayed.
  • the outer wall of the nozzle head also has a warhead shape and the groove 13 delimiting the nozzle has a section in Vé.
  • the branches of the Vé delimit between them an angle of around 45 °.
  • the pointed shape of the inner wall and the wall external is very interesting because it multiplies the nozzle adjustment possibilities.
  • said nozzle is delimited by two notches 13A, 13B in Vee communicating with each other and each extending over half the width of the nozzle and whose intersections 18 of the plans delimiting the said V-shaped notches are symmetrically to the axis slightly inclined with respect to one to the other, according to the invention, the intersections 18 of these planes converge towards the distal end of the nozzle.
  • This particular orientation significantly improves the projection quality.

Landscapes

  • Nozzles (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (4)

  1. Düse zur Zerstäubung eines flüssigen Stoffes, mit einem Gehäuse (9), das einen axialen Kanal (10) aufnimmt, welcher :
    einerseits an seinem Abwärtsende (11) durch einen Stutzen (12) am vorderen Teil des Gehäuses (9) nach außen mündet und
    andererseits an seinem Aufwärtsende an seiner Basis mit einem Zuführsystem hydraulisch verbunden ist,
    und welcher eine zylinderförmige Rotationsaufnahme ist, mit einem Abschnitt, der ausgehend von seinem Aufwärtsende auf einem Anteil (14) seiner Länge, als Aufwärtsanteil bezeichnet, konstant ist und dann nach einem vorbestimmten Profil zum Anschluß an den Stutzen allmählich enger wird,
    wobei die Mantellinie (15) der sich an den Aufwärtsanteil (14) des Kanals anschließenden inneren Wand des sog. Abwärtsanteiles (16) so bestimmt wird, daß sie eine spitzbogenförmige Kammer (17) bildet,
    und der Stutzen (12) durch einen Quereinschnitt (13) mit V-förmigem Querschnitt gebildet ist, wobei die V-Schenkel zwischen sich einen vorbestimmten gleichbleibenden Winkel begrenzen und wobei der Einschnitt durch zwei V-förmige Kerben (13A, 13B) begrenzt ist, die in Verbindung miteinander stehen, die sich je auf der Hälfte der Stutzenlänge erstrecken und deren die V-förmigen Kerben begrenzende Ebenen Schnittpunkte (18) aufweisen, welche symetrisch zur Achse leicht schräg zueinander sind,
    DADURCH GEKENNZEICHNET, daß die Schnittpunkte (18) auf das Distalende der Düse hin zusammenlaufen.
  2. Düse nach Anspruch 1, dadurch gekennzeichnet, daß die Schrägstellung der Schnittpunkte zu einer radialen Ebene in der Größenordnung von 15° liegt.
  3. Düse nach Anspruch 1 oder 2, dadurch gekennzeichnet, das die V-Schenkel zwischen sich einen Winkel in der Größenordnung von 45°.
  4. Düse nach Anspruch 1, dadurch gekennzeichnet, daß die Außenwand des Düsenkopfes auch spitzenbogenförmig ausgebildet ist.
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 EP0674946A1 (de) 1995-10-04
EP0674946B1 true 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)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG187751A1 (en) * 2010-08-16 2013-03-28 Airgard Inc Momentum transfer using liquid injection
WO2016077114A1 (en) * 2014-11-10 2016-05-19 Bowles Fluidics Corporation Spray nozzle for high viscosity (e.g., oil) spray applications with uniform spray distribution

Family Cites Families (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

Also Published As

Publication number Publication date
ATE168044T1 (de) 1998-07-15
FR2717712B1 (fr) 1996-05-15
DE69503280D1 (de) 1998-08-13
FR2717712A1 (fr) 1995-09-29
EP0674946A1 (de) 1995-10-04

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