EP0041729A1 - 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
EP0041729A1
EP0041729A1 EP81104455A EP81104455A EP0041729A1 EP 0041729 A1 EP0041729 A1 EP 0041729A1 EP 81104455 A EP81104455 A EP 81104455A EP 81104455 A EP81104455 A EP 81104455A EP 0041729 A1 EP0041729 A1 EP 0041729A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
slot
strip
ribs
flexible
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
EP81104455A
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German (de)
English (en)
Other versions
EP0041729B1 (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
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Individual
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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 invention is based on such known slot nozzles, which consist of two strips enclosing a nozzle slot, the uniform slot spacing of which is maintained by their longitudinal stiffness and by connecting links arranged at a longitudinal distance from one another.
  • the connecting links are arranged in the flow direction in front of the actual nozzle slot, so that the latter is continuous to form a coherent veil.
  • 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.
  • slot nozzles known which are formed by closely sequencing the smallest 'holes.
  • the invention has for its object to provide a slot nozzle, the slot allows constant dimensions to form a correspondingly thin medium veil with little effort even with extremely small width.
  • the solution according to the invention consists in that only one of the two strips is stiff in the longitudinal direction, while the second strip, which has an elastically flexible cross-section, bears against the other strip over a large number of small longitudinally spaced projections.
  • the slot width is determined by the dimensions of the projections or the spaces formed between them, the ratio between the length of these spaces and the longitudinal dimensions of the projections or the ratio between the length of the spaces and their width being arbitrary . In contrast to perforated row nozzles, this makes it possible to suppress those influences that counteract the formation of a thin, coherent medium veil.
  • the projections are preferably firmly connected to one of the two strips, although it is also possible to arrange them as a third link between the two strips.
  • the projections are expediently formed by ribs which remain between a plurality of grooves machined transversely to the slot direction. These grooves are expediently machined. With other methods for producing the projections, warping of the sensitive, sheet-shaped flexible strip would be feared.
  • the grooves are provided in the flexible strip, although of course they can also be arranged in the rigid strip.
  • the arrangement in the flexible bar has the advantage that it can be incorporated particularly evenly in the flexible bar and that it can be easily replaced in the event of wear by replacing the relatively cheaper flexible bar.
  • edges of the flexible strip are provided with the grooves.
  • rows of grooves can be provided on the opposite edge of the flexible strip on opposite sides.
  • the other edge of the bar can also be shaped accordingly, so that each flexible bar can be used twice or even four times by turning it over.
  • the groove 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. Thanks to the easy interchangeability of the flexible strip and the fact that any wear on the rigid strip is compensated for by the always uniform, prestressed contact of the flexible strip, the invention is also particularly suitable for abrasive media.
  • Typical application examples are gas burners, burners for gas-powered infrared emitters, blocking nozzles for shutting off in inert gas zones by means of an inert gas curtain, nozzles for forming sharp gas curtains for peeling liquids from a moving counter surface, nozzles for producing thin liquid films, for example for coating purposes.
  • the interchangeability of the flexible bar requires a bracket that enables easy replacement and still ensures a consistently correct position under tension against the other bar.
  • a holder is used for such purposes with two clamping jaws which can be clamped against one another and enclose the flexible part between them.
  • the bracket in cross section on the side facing away from the rigid bar of the flexible bar two contact points and on the side facing the rigid bar of the flexible bar one.
  • the support forces therefore increase with the forces that stress the flexible bar.
  • the flexible strip is not yet in contact with the rigid counter surface. the investment forces within the bracket are still moderate.
  • the flexible bar can therefore be easily inserted into the holder. It is also easy to correct the position to ensure the correct position. Due to the size of the pretensioning force of the flexible strip on the rigid strip, it is easy to - change the position of the flexible strip in the holder. subsequently no longer possible due to forces acting randomly under the operating conditions.
  • 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 is much closer to the rigid Bar can be arranged as a counter surface as such 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 area 2 forms the rigid nozzle bar, and a profile part 3, which contains in its rear area a feed channel 4 for the medium flowing in the direction of the arrow and in its front area 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 part 3. Between the channel 4 and the nozzle space 9 lying in front of the wall 8 there is a gap-shaped 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 part 3 is formed by two legs 11, 12, which enclose a slot 13 with each other.
  • the outer leg 11 is longer than the inner leg 12.
  • Both ends have at their ends inwardly projecting profile lugs 14, 15 which (in cross section) form contact points for the flexible nozzle strip 6.
  • a third contact point is formed by surface 15. These contact points are located so that the concave curvature shown within the profile nose 14 continues relative to the plate 1.
  • 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 bar lies against the rigid nozzle bar 2 at or near its front edge 16.
  • the arrangement is such that there is a bias in the assembled position shown, which gives the flexible bar in its front region a curvature that is concave to the plate 1 and thus opposite to the curvature in the rear region of the flexible bar.
  • 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 part 3 during the assembly of the flexible strip, the flexible bar 6 is not yet biased against the plate 1 and consequently there is still no concave curvature in the front area.
  • the flexible bar 6 rests on the rigid bar 2, 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. It is obvious that the nozzle outflow conditions can be influenced as desired by different dimensions of the ribs and grooves.
  • 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 into a continuous veil. Conversely, 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 nozzle strips, in the cross-section in which the nozzle opens outwards, is less than five times the remaining thickness of the flexible strip in this area. It is preferably even less than three times the remaining thickness 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 nozzle strip is easily interchangeable, it can be made of a less wear-resistant material that 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.
  • 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.
  • the rigid nozzle bar 7 is under tension flexible nozzle bar 6 carries ribs 28 which taper towards their rearward end 29 in the direction of flow in plan view (FIG. 7), so that the medium flowing in the grooves 17 formed therebetween is forced to unite behind them.
  • the tip angle is of course chosen so that the flow does not prematurely detach.
  • the cross section of the nozzle slot in space 32 in front of the nozzle outlet opening 30 narrows or at least remains constant towards it, but in any case does not form an extension so that the emerging medium jet from the edges of the nozzle outlet opening has a sharp and clear contour becomes.
  • This does not exclude that the nozzle slot has any other extensions or constrictions in the distance in front of the nozzle outlet opening 30, because the only thing that matters is that the nozzle outlet opening is formed as such and does not have any extensions which prevent the flow from becoming irregular at times would allow reaching the actual nozzle outlet opening.
  • the two means 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 of one another but together. Outside the area of the nozzles, they are also suitable for doctor blade arrangements in which the fixed nozzle strip 2 is replaced by a moving web to be coated or a rotating cylinder, while the flexible nozzle strip 6 forms the doctor blade.
  • 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 on the flexible strip 6 end bluntly, namely in the forehead of the flexible strip 6
  • Nozzle outlet opening 30 narrowing space 32 in Connection to 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.
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 true EP0041729A1 (fr) 1981-12-16
EP0041729B1 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 (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120957A (en) * 1982-04-16 1983-12-14 Matsushita Electric Ind Co Ltd Liquid atomizer
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
GB2271301A (en) * 1992-09-29 1994-04-13 Dmw Tech Ltd Atomising nozzle and filter
US5472143A (en) * 1992-09-29 1995-12-05 Boehringer Ingelheim International Gmbh Atomising nozzle and filter and spray generation 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
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
US5785253A (en) * 1994-09-09 1998-07-28 Voith Sulzer Papiermaschinen Gmbh Application unit for the direct or indirect application of a liquid or pasty medium onto a moving material web
US6007676A (en) * 1992-09-29 1999-12-28 Boehringer Ingelheim International Gmbh Atomizing nozzle and filter and spray generating device
US6846413B1 (en) 1997-09-26 2005-01-25 Boehringer Ingelheim International Gmbh Microstructured filter
EP2213380A1 (fr) * 2009-01-22 2010-08-04 Coroplast Fritz Müller GmbH & Co. KG Outil d'application et procédé de revêtement en forme de bande d'un support en forme de bande
DE102009017453A1 (de) 2009-04-07 2010-11-11 Hüttlin, Herbert, Dr. h.c. Spaltdüse zum Versprühen einer Flüssigkeit

Families Citing this family (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

Citations (9)

* Cited by examiner, † Cited by third party
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
AT263343B (de) * 1963-03-26 1968-07-25 Rudolf Ing Waldherr Breitschlitzdüse für eine Strangpresse
DE1479931A1 (de) * 1963-12-23 1969-05-14 Allied Chem Extruderkopf mit verstellbarer Duese
DE1729123B2 (fr) * 1951-01-28 1974-05-30 Rudolf Paul 7000 Stuttgart Fritsch
DE2631099A1 (de) * 1976-07-10 1978-01-19 Theysohn Friedrich Fa Extruder mit breitspritzduese

Patent Citations (9)

* Cited by examiner, † Cited by third party
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
DE1729123B2 (fr) * 1951-01-28 1974-05-30 Rudolf Paul 7000 Stuttgart Fritsch
AT263343B (de) * 1963-03-26 1968-07-25 Rudolf Ing Waldherr Breitschlitzdüse für eine Strangpresse
DE1479931A1 (de) * 1963-12-23 1969-05-14 Allied Chem Extruderkopf mit verstellbarer Duese
DE2631099A1 (de) * 1976-07-10 1978-01-19 Theysohn Friedrich Fa Extruder mit breitspritzduese

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120957A (en) * 1982-04-16 1983-12-14 Matsushita Electric Ind Co Ltd Liquid atomizer
DE3443263A1 (de) * 1984-11-28 1986-06-05 Mannesmann AG, 4000 Düsseldorf Schlitzduesenausbildung fuer schlitzduesen zur erzeugung eines fluessigkeitsvorhanges
US5427317A (en) * 1991-03-27 1995-06-27 Huettlin; Herbert Slotted nozzle for dispensing liquids
DE4110127A1 (de) * 1991-03-27 1992-10-01 Herbert Huettlin Duesenbaugruppe zum verspruehen von fluessigkeiten
WO1992017280A1 (fr) 1991-03-27 1992-10-15 Huettlin Herbert Tuyere a fente de distribution de liquides
DE4136806A1 (de) * 1991-11-08 1993-05-13 Ernst Hohnerlein Loettunnel
GB2271301B (en) * 1992-09-29 1997-02-05 Dmw Tech Ltd Atomising nozzle
US6503362B1 (en) 1992-09-29 2003-01-07 Boehringer Ingelheim International Gmbh Atomizing nozzle an filter and spray generating device
US5547094A (en) * 1992-09-29 1996-08-20 Dmw (Technology) Ltd. Method for producing atomizing nozzle assemblies
GB2271301A (en) * 1992-09-29 1994-04-13 Dmw Tech Ltd Atomising nozzle and filter
US5472143A (en) * 1992-09-29 1995-12-05 Boehringer Ingelheim International Gmbh Atomising nozzle and filter and spray generation device
US5911851A (en) * 1992-09-29 1999-06-15 Boehringer Ingelheim International Gmbh Atomizing nozzle and filter and spray generating device
US6007676A (en) * 1992-09-29 1999-12-28 Boehringer Ingelheim International Gmbh Atomizing nozzle and filter and spray generating device
US7246615B2 (en) 1992-09-29 2007-07-24 Boehringer International Gmbh 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
US5785253A (en) * 1994-09-09 1998-07-28 Voith Sulzer Papiermaschinen Gmbh Application unit for the direct or indirect application of a liquid or pasty medium onto a moving material web
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
US6063193A (en) * 1996-12-12 2000-05-16 Voith Sulzer Papiermaschinen Gmbh Applicator for direct or indirect application of a liquid or pasty medium onto a traveling fiber material web
US6846413B1 (en) 1997-09-26 2005-01-25 Boehringer Ingelheim International Gmbh Microstructured filter
US6977042B2 (en) 1997-09-26 2005-12-20 Klaus Kadel Microstructured filter
US7645383B2 (en) 1997-09-26 2010-01-12 Boehringer Ingelheim International Gmbh Microstructured filter
EP2213380A1 (fr) * 2009-01-22 2010-08-04 Coroplast Fritz Müller GmbH & Co. KG Outil d'application et procédé de revêtement en forme de bande d'un support en forme de bande
DE102009017453A1 (de) 2009-04-07 2010-11-11 Hüttlin, Herbert, Dr. h.c. Spaltdüse zum Versprühen einer Flüssigkeit

Also Published As

Publication number Publication date
ATE10443T1 (de) 1984-12-15
EP0041729B1 (fr) 1984-11-28
DE3167426D1 (en) 1985-01-10

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