EP0041729B1 - Tuyère à fente pour former des voiles continus sous forme gazeuse ou liquide, p. ex. pour brûleurs - Google Patents

Tuyère à fente pour former des voiles continus sous forme gazeuse ou liquide, p. ex. pour brûleurs Download PDF

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Publication number
EP0041729B1
EP0041729B1 EP81104455A EP81104455A EP0041729B1 EP 0041729 B1 EP0041729 B1 EP 0041729B1 EP 81104455 A EP81104455 A EP 81104455A EP 81104455 A EP81104455 A EP 81104455A EP 0041729 B1 EP0041729 B1 EP 0041729B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
fillet
slot
flexible
ribs
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
Application number
EP81104455A
Other languages
German (de)
English (en)
Other versions
EP0041729A1 (fr
Inventor
Erich Pagendarm
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT81104455T priority Critical patent/ATE10443T1/de
Publication of EP0041729A1 publication Critical patent/EP0041729A1/fr
Application granted granted Critical
Publication of EP0041729B1 publication Critical patent/EP0041729B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F9/00—Use of air currents for screening, e.g. air curtains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/06—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with a blast of gas or vapour
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/005—Curtain coaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits

Definitions

  • the invention relates to a slot nozzle for the formation of coherent gas or liquid veils, for example for burners, the nozzle slot of which is formed between a bar which can be deformed transversely to the nozzle slot and a bar which forms a counter surface and is rigid in the longitudinal direction, the slot spacing of which is provided by connecting links arranged at a longitudinal distance from one another is maintained.
  • slot nozzles are known (public prior use), which consist of two strips enclosing a nozzle slot, the uniform slot spacing of which is maintained by their longitudinal rigidity and by connecting elements arranged at a longitudinal distance from one another, which are arranged in the direction of flow so far in front of the actual nozzle slot that they form a continuous veil is uninterrupted.
  • both strips forming the slot are rigid in the longitudinal direction, gap widths can only be achieved down to approximately 0.2 mm. In the case of smaller gap widths, irregularities due to material distortion and thermal expansion are to be feared. In addition, the manufacturing effort is great.
  • The. invention has for its object to provide a slot nozzle of the type mentioned, the slot allows even with extremely small width with little effort constant dimensions to form a thin medium veil.
  • the solution according to the invention consists in that the elastically flexible bar abuts the counter surface under prestress over a large number of small longitudinal spacings from projections.
  • the slot width is determined by the dimensions of the projections or the gaps formed between them, and the ratio between the length of these gaps and the longitudinal dimensions of the projections or the ratio between the length of the gaps and their width can be designed as desired. This makes it possible to suppress those influences that counteract the formation of a thin, coherent medium veil.
  • the rigidity of the component forming the rigid strip can be lower than in the case of conventional nozzles; Because deviations from the planned direction cannot cause a change in the slot width, because the flexible strip is always pre-tensioned while maintaining the same slot width.
  • the projections are preferably fixedly connected to the flexible strip, although it is also possible to arrange them on the counter surface or as a third link between the flexible strip and the counter surface.
  • the projections are expediently formed by ribs, which remain between a number of grooves machined transversely to the slot direction, which are expediently machined to avoid warping in the case of a sensitive, sheet-like design of the flexible strip.
  • the arrangement of the grooves in the flexible strip has the advantage that they can be incorporated particularly evenly therein and that they can easily be replaced in the event of wear by replacing the relatively cheap flexible strip.
  • edges of the flexible strip are provided with the grooves.
  • rows of grooves can be provided on the same edge of the flexible strip on opposite sides.
  • the other edges of the bar can be shaped accordingly, so that each flexible bar can be used twice or even four times by turning it over.
  • the grooving can also be shaped differently, so that different flow characteristics can be achieved in the outflow area by turning the bar, for example different free cross sections with correspondingly different mass flow rates.
  • the invention is particularly suitable for abrasive media thanks to the easy interchangeability of the flexible strip and the fact that any wear on the counter surface is compensated for by the always uniform, preloaded contact of the flexible strip.
  • Typical application examples are gas burners, burners for gas-powered infrared emitters, blocking nozzles for blocking inert gas zones by means of an inert gas curtain, nozzles for forming sharp gas curtains for peeling liquids off a moving counter surface, nozzles for producing thin liquid films, for example for coating purposes.
  • the ribs forming the projections expediently run out at an acute angle in the direction of flow, so that the medium flowing in the interstices between the ribs merges more easily behind the ribs. Furthermore, the union of those separated from the ribs Flow areas are facilitated by the fact that a space free of ribs or projections is formed in the direction of flow in front of the nozzle outlet opening and is designed to be expansion-free directly in front of the nozzle outlet opening. According to a further feature of the invention, this rib-free space can be formed by a second flexible strip which projects above the first flexible strip which carries the ribs. The interchangeability of the flexible strip requires a bracket that enables easy replacement and still guarantees a consistently correct system under tension on the counter surface.
  • bracket in cross-section on the opposite surface of the flexible bar side two contact points and on the rigid bar side facing the flexible bar one between the forms two other contact points arranged between which the flexible strip is curved in the opposite direction to the curvature imposed on it by the prestressing on the counter surface. This gives the flexible bar a curvature that is S-shaped in cross-section when installed.
  • the holder has the advantage that it gives the flexible strip considerable stiffness, which is otherwise only achieved when clamped between two opposing jaws, but the holder according to the invention can be arranged much closer to the rigid counter surface than clamping jaws. It can therefore be achieved within the scope of the invention greater stiffness of the flexible bar due to the short collar length.
  • the holder expediently comprises a rigid profile strip with a slot that is profiled to form the contact points, whereby according to a further feature of the invention the contact point formed inside the slot is formed by a continuous surface that intersects the extended connecting line of the other two support points at an acute angle.
  • the front region 2 forms the rigid strip
  • a profile strip 3 which contains in its rear region a feed channel 4 for the medium flowing in the direction of the arrow and in its front region the holder 5 for forms the flexible strip 6, which includes the nozzle slot 7 with the front part 2 of the plate 1.
  • the two parts are screwed together in the area of a central wall 8 of the profile strip 3. Between the channel 4 and the nozzle space 9 lying in front of the wall 8 there is a gap-like flow connection between the wall 8 and the inner surface of the plate 1 which is at a distance from it.
  • the channel 4 is closed to the rear by a seal 10.
  • the bracket 5 of the profile strip 3 is formed by two legs 11, 12, which enclose a slot 13 with each other.
  • the outside leg 11 is longer than the inside Legs 12.
  • Both ends have profile lugs 14, 15 projecting inwards at their ends, which (in cross section) form contact points for the flexible nozzle strip 6.
  • a third contact point is formed by surface 25. These contact points are located such that the curvature shown, which is concave with respect to the plate 1, continues within the profile nose 14.
  • the relatively high contact pressure of the flexible strip 6 with the profile lugs 14, 15 generally causes an adequate seal against the medium at these points. If necessary, however, additional sealing arrangements can be provided.
  • the flexible nozzle strip lies against the rigid strip formed by part 2 of plate 1.
  • the arrangement is such that in the assembled position shown there is a pretension which gives the flexible strip in its front region a curvature which is convex to the counter surface and thus in the opposite direction to the curvature in the rear region of the flexible strip.
  • the front curvature also continues behind the nose 14, so that the contact pressure within the holder 5 is thereby increased.
  • the contact pressure is lower as long as the plate 1 is not yet screwed to the profile strip 3 during the assembly of the flexible strip, the flexible strip 6 is not yet pretensioned against the plate 1 and, consequently, it is still at the concave curvature in the front region is missing.
  • the flexible strip 6 rests on the rigid counter surface, it is provided with a plurality of milled grooves 17, between which ribs 18 remain.
  • the ribs 18 are considerably narrower than the grooves 17, the grooves being longer in the longitudinal direction of the nozzle than transverse to it.
  • the media will be made particularly narrow in the case of media which after the slot interruptions caused by the ribs 18 are more difficult to combine to form a continuous veil.
  • a larger rib width can be tolerated with less critical media.
  • the width of the grooves 17, that is to say their dimension in the longitudinal direction of the flexible strip 6 in that cross section in which the nozzle opens outwards, is advantageously less than five times the remaining thickness of the flexible strip in this area.
  • the width of the ribs in this area is expediently less than twice the groove depth (dimension transverse to the nozzle gap plane).
  • the flexible strip is easily interchangeable, it can be made of a less wear-resistant material, which can be more easily provided with the grooves described in the cutting process, for example plastic.
  • a nozzle with the basic structure of FIGS. 1 and 2 can be used for a wide variety of applications, for example for a burner, for producing a liquid film or for producing a flat air jet with which a liquid film is peeled off from a moving counter surface.
  • Fig. 3 shows the nozzle according to the invention in use for producing a liquid film 19 which runs down a vertical wall 20 which at the same time forms the counter surface of the rigid strip of the nozzle arrangement.
  • the nozzle arrangement is provided vertically downward above a horizontally running web 21 and is used there, for example, as a burner for the heat treatment of the web or as an air brush.
  • FIG. 5 illustrates the use of the nozzle to create a liquid curtain 22 for coating the web 23.
  • the nozzle arrangement described above is suitable for all media which easily reunite after passing through the ribbed part of the nozzle or for those applications in which unification is not essential.
  • the nozzle design according to FIGS. 6 and 7 is suitable.
  • FIG. 6 it can be seen that those formed by the rigid strip 2 Mating surface under prestressed flexible strip 6 carries ribs 28, which taper towards their end 29 lying in the direction of flow in the top view (FIG. 7), so that the medium flowing in the grooves 17 formed therebetween is forced to unite behind them.
  • the tip angle is chosen so that there is no premature separation of the flow.
  • the cross section of the nozzle slot in the space 32 in front of the nozzle outlet opening 30 narrows or at least remains constant, but in any case does not form an extension, so that the emerging medium jet is sharply and clearly contoured by the edges of the nozzle outlet opening .
  • the two features of the pointed runout of the ribs 28, on the one hand, and the presence of a rib-free, non-widening space 32 following the ribs 28 in front of the nozzle outlet opening 30, on the other hand, can preferably be used independently, but also jointly, for example also in doctor blade arrangements in which the rigid strip is formed by a moving web to be coated or a rotating cylinder.
  • Fig. 8 shows a nozzle arrangement, in which only the means of a rib-free, narrowing space in front of the nozzle outlet opening 30 is applied, while the ribs 18 end on the flexible strip 6 butt, in the forehead of the flexible strip 6.
  • the Nozzle outlet opening 30 constricting space 32 in connection with the ribs is formed by a second flexible strip 33, which rests above the flexible strip 6 in the manner of a support squeegee and projects above it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Coating Apparatus (AREA)
  • Gas Burners (AREA)
  • Nozzles (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Claims (10)

1. Tuyère à fente pour la formation de voiles gazeux ou liquides continus, par exemple pour brûleurs, tuyère dont la fente (7) est formée entre une bande (6, 33) déformable transversalement par rapport à la fente de la tuyère et une bande rigide en direction longitudinale, constituant une contre-surface (plaque 1, 2), bandes dont l'écart formant la fente est maintenu par des éléments de jonction disposés à distance longitudinale les uns des autres, caractérisée en ce que la bande (6, 33), réalisée sous forme élastiquement flexible, est appliquée sous précontrainte contre la contre-surface (plaque 1, 2) par une multiplicité de saillies (18, 28) qui présentent de petits intervalles entre elles en direction longitudinale.
2. Tuyère selon la revendication 1, caractérisée en ce que les saillies (18) sont solidarisées d'un seul tenant à la bande flexible (6).
3. Tuyère selon la revendication 1 ou 2, caractérisée en ce que les saillies sont constituées par les nervures (18) formées entre une multiplicité de rainures (17) creusées transversalement par rapport à la direction de la fente.
4. Tuyère selon la revendication 3, caractérisée en ce qu'en vue d'une utilisation multiple, la bande flexible (6) est rainurée sur plusieurs de ses bords.
5. Tuyère selon l'une quelconque des revendications 1 à 4, caractérisée en ce que les nervures (28) se terminent à angle aigu dans le sens du courant.
6. Tuyère selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'il est formé, en amont de l'orifice de sortie (30) de la tuyère dans le sens du courant, un espace (32) libre de nervures (28) qui est réalisé sans élargissement immédiatement avant l'orifice (30) de la tuyère.
7. Tuyère selon la revendication 6, caractérisée en ce que l'espace (32) libre de nervures est formé par une seconde bande flexible (33) qui dépasse la première bande flexible (6) portant les nervures (18, 28).
8. Tuyère selon l'une quelconque des revendications 1 à 7, caractérisée en ce qu'une monture (5) pour la bande flexible (6) forme deux points d'appui (14, 25) du côté de la bande flexible (6) situé à l'opposé de la contre-surface en coupe transversale et un point d'appui (15) situé en position décalée entre les deux autres points d'appui (14, 25) du côté de la barre flexible dirigé vers la contre-surface, points d'appui entre lesquels la bande flexible (6) est courbée en sens inverse de la courbure qui lui est imposée par la pré-contrainte contre la contre-surface.
9. Tuyère selon la revendication 8, caractérisée en ce qu'elle présente une bande profilée (3) rigide en soi, comportant une fente (13) profilée de manière à former les points d'appui (14, 15, 25).
10. Monture pour tuyère selon la revendication 9, caractérisée en ce que le point d'appui formé le plus à l'intérieur de la fente (13) est constitué par une surface continue (25) qui coupe à angle aigu le prolongement de la ligne de jonction des deux autres points d'appui (14, 15).
EP81104455A 1980-06-10 1981-06-10 Tuyère à fente pour former des voiles continus sous forme gazeuse ou liquide, p. ex. pour brûleurs Expired EP0041729B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81104455T ATE10443T1 (de) 1980-06-10 1981-06-10 Schlitzduese zur bildung von zusammenhaengenden gas- oder fluessigkeitsschleiern, beispielsweise fuer brenner.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3021710 1980-06-10
DE3021710 1980-06-10

Publications (2)

Publication Number Publication Date
EP0041729A1 EP0041729A1 (fr) 1981-12-16
EP0041729B1 true EP0041729B1 (fr) 1984-11-28

Family

ID=6104242

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81104455A Expired EP0041729B1 (fr) 1980-06-10 1981-06-10 Tuyère à fente pour former des voiles continus sous forme gazeuse ou liquide, p. ex. pour brûleurs

Country Status (3)

Country Link
EP (1) EP0041729B1 (fr)
AT (1) ATE10443T1 (fr)
DE (1) DE3167426D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4013319A1 (de) * 1990-04-26 1991-10-31 Pagendarm Gmbh Vorrichtung zum auftragen einer schicht auf eine substratbahn
DE19708957A1 (de) * 1995-09-06 1998-09-10 Voith Sulzer Papiermasch Gmbh Auftragwerk zum direkten oder indirekten Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn
US10639653B1 (en) 2017-02-09 2020-05-05 AirBTU, Inc. Air outlet device

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58180255A (ja) * 1982-04-16 1983-10-21 Matsushita Electric Ind Co Ltd 噴霧装置
DE3443263A1 (de) * 1984-11-28 1986-06-05 Mannesmann AG, 4000 Düsseldorf Schlitzduesenausbildung fuer schlitzduesen zur erzeugung eines fluessigkeitsvorhanges
DE4110127A1 (de) 1991-03-27 1992-10-01 Herbert Huettlin Duesenbaugruppe zum verspruehen von fluessigkeiten
DE4136806A1 (de) * 1991-11-08 1993-05-13 Ernst Hohnerlein Loettunnel
GB9220505D0 (en) * 1992-09-29 1992-11-11 Dmw Tech Ltd Atomising nozzle and filter
US6007676A (en) 1992-09-29 1999-12-28 Boehringer Ingelheim International Gmbh Atomizing nozzle and filter and spray generating device
IL107120A (en) * 1992-09-29 1997-09-30 Boehringer Ingelheim Int Atomising nozzle and filter and spray generating device
DE4432177A1 (de) * 1994-09-09 1996-03-14 Voith Gmbh J M Auftragswerk zum direkten oder indirekten Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn
ATE200325T1 (de) * 1994-09-09 2001-04-15 Voith Paper Patent Gmbh Auftragswerk zum direkten oder indirekten auftragen eines flüssigen oder pastösen mediums auf eine laufende materialbahn
DE19651738A1 (de) * 1996-12-12 1998-06-18 Voith Sulzer Papiermasch Gmbh Auftragswerk zum direkten oder indirekten Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Oberfläche
DE19742439C1 (de) 1997-09-26 1998-10-22 Boehringer Ingelheim Int Mikrostrukturiertes Filter
ATE541647T1 (de) * 2009-01-22 2012-02-15 Coroplast Fritz Mueller Gmbh Auftragswerkzeug und verfahren zum streifenförmigen beschichten eines bahnförmigen trägers
DE102009017453A1 (de) 2009-04-07 2010-11-11 Hüttlin, Herbert, Dr. h.c. Spaltdüse zum Versprühen einer Flüssigkeit

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
AT21865B (de) * 1903-10-31 1905-10-25 W N Best Internat Calorific Co Brenner für flüssige Brennstoffe.
AT27064B (de) * 1904-12-14 1907-01-10 Georges Cosmovici Flachbrenner zur Verbrennung flüssiger Brennstoffe in Feuerungen.
US1986311A (en) * 1932-06-20 1935-01-01 Crouse Hinds Co Gas burner
US2303992A (en) * 1940-10-09 1942-12-01 Joseph C W Frazer Injector nozzle
US2565039A (en) * 1946-10-05 1951-08-21 Herman G Mueller Vortical flame gas burner
DE1729123A1 (de) * 1951-01-28 1971-06-09 Fritsch Rudolf P Breitschlitzduese
AT263343B (de) * 1963-03-26 1968-07-25 Rudolf Ing Waldherr Breitschlitzdüse für eine Strangpresse
BE657349A (fr) * 1963-12-23 1965-04-16
DE2631099A1 (de) * 1976-07-10 1978-01-19 Theysohn Friedrich Fa Extruder mit breitspritzduese

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4013319A1 (de) * 1990-04-26 1991-10-31 Pagendarm Gmbh Vorrichtung zum auftragen einer schicht auf eine substratbahn
DE19708957A1 (de) * 1995-09-06 1998-09-10 Voith Sulzer Papiermasch Gmbh Auftragwerk zum direkten oder indirekten Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn
US10639653B1 (en) 2017-02-09 2020-05-05 AirBTU, Inc. Air outlet device

Also Published As

Publication number Publication date
EP0041729A1 (fr) 1981-12-16
DE3167426D1 (en) 1985-01-10
ATE10443T1 (de) 1984-12-15

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