EP0657222B1 - Buse d'injecteur - Google Patents

Buse d'injecteur Download PDF

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Publication number
EP0657222B1
EP0657222B1 EP94117615A EP94117615A EP0657222B1 EP 0657222 B1 EP0657222 B1 EP 0657222B1 EP 94117615 A EP94117615 A EP 94117615A EP 94117615 A EP94117615 A EP 94117615A EP 0657222 B1 EP0657222 B1 EP 0657222B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
injector nozzle
mixing chamber
chamber
outlet
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
EP94117615A
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German (de)
English (en)
Other versions
EP0657222A1 (fr
Inventor
Jordt-Steffen Graef
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.)
GRAEF JORDT STEFFEN
Original Assignee
GRAEF JORDT STEFFEN
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 GRAEF JORDT STEFFEN filed Critical GRAEF JORDT STEFFEN
Publication of EP0657222A1 publication Critical patent/EP0657222A1/fr
Application granted granted Critical
Publication of EP0657222B1 publication Critical patent/EP0657222B1/fr
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
    • 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
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0425—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid without any source of compressed gas, e.g. the air being sucked by the pressurised liquid
    • 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
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/32—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages in which a valve member forms part of the outlet opening
    • B05B1/326—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages in which a valve member forms part of the outlet opening the valve being a gate valve, a sliding valve or a cock
    • 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
    • B05B7/0892—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 the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being disposed on a circle

Definitions

  • the invention relates to an injector nozzle for production air-filled liquid drop, according to the Preamble of claim 1.
  • nozzles for example a liquid and a gaseous medium fed under pressure, these media within a Mixing chamber are mixed together.
  • additional air is usually only used to increase speed the particles or droplets or Refinement of the drop spectrum, i.e. for downsizing the average drop diameter is used.
  • Air pressure also affects the amount of the liquid sprayed out, causing the technical Effort through facilities for quantity regulation or -constant maintenance is still increased.
  • an injector nozzle which attaches itself to a metering nozzle with an outlet bore a Venturi tube connects, which is a kind of nozzle body forms.
  • a venturi channel is central in this venturi tube trained, one against the dosing nozzle backwards conically widening mouth as well as a adjoining the conical mouth in the direction of flow, obviously essentially cylindrical Venturi hole contains that in one Embodiment in a jump in cross section extended mixing chamber, which in turn opens with the spray nozzle outlet is in flow communication; after some other embodiments are separate Mixing chamber apparently not required.
  • the invention is therefore based on the object Injector nozzle of the prerequisite in the preamble of claim 1 kind of creating that while maintaining the advantages of the known known Versions as well as a relatively simple construction through a particularly high uniformity of the drop sizes and a largely fluctuation-free distribution characteristic distinguishes this drop of liquid.
  • this injector nozzle expanded the chamber designed as a mixing chamber is conical Towards the cavity, and this cavity forms a homogenizing and calming room with the effect a pulsation damper.
  • This homogenization and calming room can be designed as a wind chamber-like cavity and acts as a kind of pulsation dampener or pressure accumulator, whereby the undesirable fluctuations, as in the known designs explained occur largely and in general even can be completely avoided, this also for so-called micropulsations applies.
  • this homogenizing and calming room is also a particularly high uniformity in the Size of the liquid drop at essentially fluctuation-free distribution characteristics achieved.
  • the so from the outlet opening of the outlet element air-filled liquid drops emerging from this injector nozzle are extremely unaffected by wind and worry thus for an optimal covering structure of the ejected Liquid on a target surface, for example Plant surfaces when it comes to spreading and Distributing crop protection products goes.
  • the inventive Injector nozzle the inlet cross-section of the homogenizing and calming space about 1.5 to 9 times Value, preferably 3 to 5 times the value of the outlet cross-section the mixing chamber.
  • the Cavity forming a homogenizing and calming space have at least about twice the volume of that Mixing chamber, the shapes and configurations of this Different in a very favorable way Purposes can be customized. Accordingly can the homogenization and calming room Have total length that is greater than the length of the Mixing chamber.
  • the homogenizing and calming room a rear Has space area that the forming the mixing chamber Component encloses in a ring.
  • the uniformity of the size of the liquid drops can also in an advantageous manner if necessary be improved in that between the mixing chamber and the outlet element, preferably by a Wire mesh or perforated sheet formed, perforated Element is provided.
  • the air intake opening the mixing chamber to a device, preferably a throttle device to change the intake air quantity can be connected. In this way if necessary, the drop exit speed and drop size are affected.
  • the air intake opening of the mixing chamber can also also to an air system under pressure, preferably to the exhaust system of a carrier vehicle, be connectable. This can be the case, for example if the injector nozzle belongs to an injection unit, with the pesticide should and that of a motor vehicle with an internal combustion engine will be carried.
  • This injector 1 is air-filled to generate Drops of liquid are formed and contain as main components a dosing nozzle element 2 for generating a Liquid jet, a central nozzle body 3 with a centrally formed one in the flow direction (Arrow 4) of the liquid jet onto the dosing nozzle element 2 following mixing chamber 5, which with a Air intake 6 is provided and for generation a liquid-air mixture is used, as well as an in Shape of a distributor mouthpiece 7 formed outlet element, with at least one outlet opening 8 is provided for the liquid-air mixture.
  • This outlet element or distributor mouthpiece 7 is interchangeably provided by using a Quick release system is attached to the nozzle body 3, which is preferably a bayonet fitting 9 can act.
  • FIGS. 1 and 2 is the distributor mouthpiece 7 facing away End of the nozzle body 3 with an open to the outside, provided central, axial threaded bore 10, on the bottom 10a of the dosing nozzle element 2 in the Way is loosely supported that its nozzle opening is coaxial to the central longitudinal axis 1a as well as directly subsequent mixing chamber 5 is aligned.
  • This dosing nozzle element 2 can thus be replaced in the threaded bore 10 is added and by a plug-like threaded adapter with external thread 11 set the one coaxial to the longitudinal axis of the nozzle 1a aligned through hole 11a and on its opposite the dosing nozzle element 2 Provide a union nut 12 at the end is through which the whole injector 1 to a corresponding - Line not illustrated here (Pipe system) can be connected through which brought a liquid to be distributed under pressure becomes.
  • FIG. 1 also shows, there is 5 between the mixing chamber and the distributor mouthpiece 7 has a cavity, through which a homogenizing and calming space 13 is formed is the entrance cross-section (indicated abruptly by the dash-dotted line 13a) with respect to the outlet cross section 5a of the mixing chamber 5 is enlarged.
  • This inlet cross section 13a of the homogenizing and calming space 13 has approximately that 1.5 to 9 times the value, preferably 3 to 5 times Value of the outlet cross section 5a of the mixing chamber 5 on.
  • the Homogenization and calming space 13 according to the respective application requirements of the injector nozzle 1 be designed differently.
  • the homogenizing and calming space 13 can have an overall length L that is greater than the length of the mixing chamber 5.
  • the homogenizing and calming space 13 a rear space 13b, which the mixing chamber 5 forming component 3a of the nozzle body 3 annular encloses.
  • an annular sealing body 14 suitable sealing or buffer material arranged is, the interior of which also forms part of the homogenizing and calming space 13.
  • Figure 1 In the embodiment illustrated in Figure 1 is that which extends coaxially to the longitudinal axis 1a of the nozzle Mixing chamber 5 designed so that they become Homogenization and calming space 13 expanded conically, so that overall training according to Art of the known Venturi system.
  • the air intake 6 approximately in the form of a radial Be bore and - in the direction of flow (Arrow 4) looking at the liquid jet - into the rear, approximately cylindrical widened end 5b of the mixing chamber 5 flow into.
  • the interchangeable dosing nozzle element 2 can also be designed in different ways. According to the embodiment in Fig. 1 assume that it is self-centering. For this purpose the front end 2b containing the nozzle opening 2a this dosing nozzle element 2 is approximately conical be and partly in the roughly cylindrical rear Engage end 5b of mixing chamber 5.
  • the outlet opening 8 provided therein can each for the respective application of the injector nozzle 1 have appropriate training to the emerging Liquid-air mixture, for example, in the form of a To give flat jet, full cone, cone or the like.
  • 1 ' is located inside the injector nozzle.
  • the homogenizing and calming space 13 'in particular large-volume and designed with a room area 13'a, which is larger in diameter than the rest Spaces of this homogenizing and calming room 13 'has.
  • This room area expanded in diameter 13'a is provided approximately in the longitudinal section of the homogenizing and calming space 13 ', which the Outlet cross-section 5a surrounds the mixing chamber 5, so that a particularly large inlet cross section of the Homogenizing and calming space 13 'in comparison to the outlet cross section 5a of the mixing chamber 5 is.
  • At least the front area 13'c of the room 13 ' can also move in the direction of flow (arrow 4) Extend the liquid jet slightly conically.
  • FIG. 4 shows an embodiment of the injector nozzle 1 '' illustrates their homogenizing and calming space 13 '' similar to the homogenization and calming room 13 'can be implemented according to FIG. 3, with the exception that that here (Fig. 4) there is no enlarged spatial area is available. Rather, the homogenizing and calming space 13 ′′ extends as shown in FIG its entire length in the direction of flow (arrow 4) slightly conical.
  • the embodiment shows the embodiment the injector nozzle 1 '' 'in Fig. 5 yet another Special feature insofar as it is interchangeable arranged in the threaded bore 10 and dosing nozzle element defined by the threaded adapter 11 2 'essentially in the form of a nozzle disk can be surrounded by an O-ring 17 is made of an elastic sealing material can and this dosing nozzle element 2 'with his Align nozzle opening 2'a coaxially to the longitudinal axis 1 '' 'a, whereby a kind of self-centering is also achieved here can be.
  • FIG. 7 shows an embodiment of the injector nozzle, in which the homogenization and calming room 13 '' '' 'between the mixing chamber 5 and the distributor mouthpiece 7 kept particularly small in volume is, but also an abrupt increase its entrance cross-section compared to the Has outlet cross section of the mixing chamber 5. Also in this case it is again assumed that between the mixing chamber 5 and the distributor mouthpiece 7 a perforated Element (preferably wire mesh 16 or Perforated plate 15) is provided, the same as in 5 and 6 - in the annular sealing body 14 can be installed.
  • a perforated Element preferably wire mesh 16 or Perforated plate 15
  • a cover 18 When executing the injector nozzle according to Fig. 7 to mention another peculiarity. After that can the air intake 6 through a cover 18 be protected, preferably - as illustrated in Fig.7 - In the form of a ring diaphragm which covers a kind of annulus or annular gap 18a and in an axial extension of the sleeve-like fastening part 19 of the bayonet catch 9 or at another version of the quick release system for the distributor mouthpiece 7 also in a fastening nut or union nut can be integrated can. On such a cover 18 of the air intake opening 6 can possibly flow back liquid particles be caught, so that there is a separate Check valve with the associated operational Disadvantages can be avoided in a simple manner can.
  • Air intake opening 6 With regard to the structural design in the area of Air intake opening 6 is again based on the figure 4 illustrated embodiment received. There there is also an option specified, such as the Air intake 6 of the mixing chamber 5 to a device preferably to a throttle device 20 for Change in the amount of air sucked in can be.
  • This throttle device illustrated at 20 can of course also by any other suitable device must be formed, the corresponding Change or control of the intake Air volume allowed.
  • Fig. 8 shows an embodiment of the distributor mouthpiece 7 'with a single outlet opening 8', the an adjustable cross-section in terms of shape and size having.
  • the latter can be achieved that approximately in the area in front of this outlet opening 8 ' an adjusting perforated disk 21 in the manner of an adjusting aperture can be provided that either twisted or can be moved transversely or radially around the nozzle outlet opening 8 'or their cross section in the desired Way to adjust.
  • Fig. 9 shows an embodiment in which this in turn designed as a distributor mouthpiece 7 '' has a plurality of outlet openings 8 ′′, which in with respect to the nozzle longitudinal axis 1a to each other to the outside can be aligned divergent.

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  • Nozzles (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Percussion Or Vibration Massage (AREA)

Claims (16)

  1. Buse d'injection destinée à la génération de gouttes de liquide emplies d'air, comprenant :
    a) un élément doseur (2, 2') de génération d'un jet de liquide
    b) un corps de buse (3) comprenant une chambre (5) qui fait suite à l'élément doseur dans le sens (4) de la circulation du jet de liquide et dans l'extrémité arrière élargie (5b) de laquelle débouche un orifice (6) d'aspiration d'air destiné à générer un mélange de liquide et d'air, cette chambre étant conformée à la manière d'un système Venturi,
    c) ainsi qu'un élément de sortie (7) comprenant au moins une buse (8) de sortie du mélange de liquide et d'air,
    d) une cavité (13, 13''...) qui s'élargit brusquement par rapport à la section de sortie (5a) de la chambre (5) étant prévue entre cette chambre et l'élément de sortie (7),
       caractérisée en ce que
    e) la chambre conformée en chambre mélangeuse (5) s'élargit en cône vers la cavité (13, 13'...) et cette cavité forme une chambre d'homogénéisation et de tranquillisation (13, 13', 13'') agissant en amortisseur de pulsations.
  2. Buse d'injection selon la revendication 1, caractérisée en ce que la section d'entrée (13a) de la chambre d'homogénéisation et de tranquillisation (13) correspond à 1,5 à 9 fois, de préférence à 3 à 5 fois la section de sortie (5a) de la chambre mélangeuse (5).
  3. Buse d'injection selon la revendication 1, caractérisée en ce que la chambre d'homogénéisation et de tranquillisation (13, 13', 13'') a une longueur globale (L) qui est supérieure à la longueur de la chambre mélangeuse (5).
  4. Buse d'injection selon la revendication 1, caractérisée en ce que la chambre d'homogénéisation et de tranquillisation (13, 13', 13'') comporte une zone arrière (13b, 13') qui entoure en anneau le composant (3a) qui forme la chambre mélangeuse (5).
  5. Buse d'injection selon la revendication 1, caractérisée en ce que la chambre d'homogénéisation et de tranquillisation (13') comprend au moins une zone (13' a) qui a un diamètre plus grand que celui des autres zones de la chambre d'homogénéisation et de tranquillisation.
  6. Buse d'injection selon la revendication 1, caractérisée en ce qu'un élément perforé, formé de préférence d'une toile métallique (16) ou d'une tôle perforée (15), est prévu entre la chambre mélangeuse (5) et l'élément de sortie (7).
  7. Buse d'injection selon l'une des revendications précédentes, caractérisée en ce que l'élément de sortie (7) est interchangeable.
  8. Buse d'injection selon la revendication 7, caractérisée en ce que l'élément de sortie (7) est fixé par un système de fixation rapide, de préférence par une fermeture à baïonnette (9).
  9. Buse d'injection selon l'une des revendications précédentes, caractérisée en ce que l'élément doseur (2, 2') est interchangeable.
  10. Buse d'injection selon l'une des revendications précédentes, caractérisée en ce que l'élément doseur (2) est à auto-centrage.
  11. Buse d'injection selon l'une des revendications précédentes, caractérisée en ce que l'élément de sortie (7'') comporte plusieurs orifices de sortie (8'').
  12. Buse d'injection selon l'une des revendications précédentes, caractérisée en ce que l'orifice de sortie (8') de l'élément de sortie (7') a une section dont la forme et la grandeur sont réglables.
  13. Buse d'injection selon l'une des revendications précédentes caractérisée en ce que l'orifice (6) d'aspiration d'air de la chambre mélangeuse (5) peut se raccorder à un dispositif, de préférence à un dispositif d'étranglement (20), destiné à modifier le débit d'air aspiré.
  14. Buse d'injection selon l'une des revendications précédentes, caractérisée en ce que l'orifice d'aspiration d'air de la chambre mélangeuse peut se raccorder à un système pneumatique qui est en dépression, avantageusement au système d'échappement des gaz d'un véhicule porteur.
  15. Buse d'injection selon l'une des revendications précédentes, caractérisée en ce que l'orifice (6) d'aspiration d'air de la chambre mélangeuse (5) est protégé par un élément de couverture (18) qui est avantageusement formé d'un diaphragme annulaire qui est intégré dans un élément de fixation (19) du système de fixation rapide (19) de l'élément de sortie (7)
  16. Buse d'injection selon l'une des revendications précédentes, caractérisée en ce qu'au moins un autre orifice d'aspiration est prévu pour l'alimentation de la chambre mélangeuse en d'autres liquides et/ou gaz.
EP94117615A 1993-11-11 1994-11-08 Buse d'injecteur Expired - Lifetime EP0657222B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4338585 1993-11-11
DE4338585A DE4338585A1 (de) 1993-11-11 1993-11-11 Injektordüse

Publications (2)

Publication Number Publication Date
EP0657222A1 EP0657222A1 (fr) 1995-06-14
EP0657222B1 true EP0657222B1 (fr) 1998-02-11

Family

ID=6502397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94117615A Expired - Lifetime EP0657222B1 (fr) 1993-11-11 1994-11-08 Buse d'injecteur

Country Status (10)

Country Link
US (1) US5615836A (fr)
EP (1) EP0657222B1 (fr)
AT (1) ATE163142T1 (fr)
AU (1) AU685512B2 (fr)
BR (1) BR9404568A (fr)
DE (2) DE4338585A1 (fr)
DK (1) DK0657222T3 (fr)
ES (1) ES2112466T3 (fr)
GR (1) GR3026684T3 (fr)
RU (1) RU94041755A (fr)

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Also Published As

Publication number Publication date
DK0657222T3 (da) 1998-09-23
AU7760694A (en) 1995-05-18
RU94041755A (ru) 1996-09-20
US5615836A (en) 1997-04-01
AU685512B2 (en) 1998-01-22
DE59405256D1 (de) 1998-03-19
EP0657222A1 (fr) 1995-06-14
ES2112466T3 (es) 1998-04-01
GR3026684T3 (en) 1998-07-31
ATE163142T1 (de) 1998-02-15
DE4338585A1 (de) 1995-05-18
BR9404568A (pt) 1995-06-20

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