EP0345670B1 - Sprühkopf für Düsenfeuchter und Verfahren zum Befeuchten - Google Patents

Sprühkopf für Düsenfeuchter und Verfahren zum Befeuchten Download PDF

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Publication number
EP0345670B1
EP0345670B1 EP89110067A EP89110067A EP0345670B1 EP 0345670 B1 EP0345670 B1 EP 0345670B1 EP 89110067 A EP89110067 A EP 89110067A EP 89110067 A EP89110067 A EP 89110067A EP 0345670 B1 EP0345670 B1 EP 0345670B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
air
water
spray head
nozzle element
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
EP89110067A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0345670A3 (en
EP0345670A2 (de
Inventor
Stefan H. Winheim
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.)
VIB Apparatebau GmbH
Original Assignee
VIB Apparatebau GmbH
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 VIB Apparatebau GmbH filed Critical VIB Apparatebau GmbH
Priority to AT89110067T priority Critical patent/ATE79789T1/de
Publication of EP0345670A2 publication Critical patent/EP0345670A2/de
Publication of EP0345670A3 publication Critical patent/EP0345670A3/de
Application granted granted Critical
Publication of EP0345670B1 publication Critical patent/EP0345670B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G7/00—Damping devices
    • 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
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
    • B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
    • 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
    • B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/50—Spraying or projecting

Definitions

  • the invention relates to a spray head for nozzle dampers with a housing, an air nozzle element with nozzle bore for air outlet, a swirl body arranged in the air nozzle element and a water nozzle element projecting through the air nozzle element with a nozzle stick, at the tip of which a water outlet opening is arranged, a first annular gap being formed between the nozzle bore and the nozzle stick is.
  • the invention further relates to a method for moistening paper, in which an air stream is rotated at low pressure and absorbs water from a water nozzle.
  • a spray head and a method of the type mentioned are known from DE-PS 952 765.
  • both the air nozzle element and the water nozzle element are screwed into the housing separately, the swirl body having a sliding fit being arranged on the water nozzle element.
  • the annular gap between the nozzle bore and the nozzle assembly determines the quantity and the azimuthal distribution the exiting air.
  • the air is set in rotation by the swirl body.
  • a hollow cone-shaped spray jet is created. Because of the tolerances that are possible in the threads, the two nozzle elements can be arranged relative to one another during assembly such that the shape of the annular gap varies in the circumferential direction and thus deviates from a desired shape. This can lead to an irregular formation of the spray cone and thus to an uneven moistening of a web to be moistened.
  • FR-A-1 273 772 shows a device for atomizing liquids, in which one nozzle element is held centrally by another and is connected to the latter via a fit.
  • the air nozzle element has at its end opposite the nozzle bore a first fitting surface which runs concentrically to the central axis of the nozzle bore and the water nozzle element has a second fitting surface which cooperates with the first fitting surface.
  • the fit surfaces are therefore located at a point where they function as the spray head, i.e. can not affect the absorption of water through the air.
  • the second fitting surface is arranged on the outside of the water nozzle element.
  • the water nozzle element which must be passed through the air nozzle element, can simply be inserted into the nozzle element, where the fit ensures a secure fit. This results in a relatively simple assembly option.
  • the fit is an interference fit.
  • the assignment of water nozzle element to air nozzle element can thus be ensured with high accuracy.
  • the mating surfaces either run parallel to the longitudinal axis of the housing or are designed as a conical seat.
  • the cone seat has the advantage that it displaces the water nozzle element is not possible in the air nozzle element in the axial direction.
  • the air nozzle element has a channel opening into the nozzle opening. At least one through hole is provided in its wall, which opens into the channel between the first fitting surface and the nozzle bore.
  • the water nozzle element is arranged on the side of the channel opposite the nozzle bore. For reasons of stability, the water nozzle element expediently fills the entire channel cross section and the fit surface extends over the entire circumference. The hole ensures in a simple manner that air can enter the air nozzle element.
  • the swirl body is arranged between the through hole and the nozzle bore. This causes the air to rotate on the way from the air supply duct to the nozzle without causing unwanted turbulence.
  • the air nozzle element is screwed into the housing. Since the pressure of the water and air comes from the interior of the housing, it is advantageous if the last element in the pressure direction is attached to the housing in order to hold all the other elements.
  • the water nozzle element has an enlarged diameter in the region of the second fit surface. This increases the available fit area. This increases the stability of the spray head.
  • the housing advantageously has a centrally arranged water supply channel opening into an air supply channel, the water supply channel being sealed off from the air supply channel by the water nozzle element and a seal arranged between the water nozzle element and the housing.
  • the water nozzle element has an extension which can be inserted into the water supply channel. This has the advantage during assembly that the seal can simply be attached to the extension, where it stops due to a certain internal stress. After screwing in the air nozzle element, the seal between the water supply duct and the air supply duct is then produced almost automatically.
  • the prior art method of wetting paper provides a non-uniform moisture profile across the web. It is therefore also an object of the invention to provide a method with which more uniform moistening can be achieved.
  • both air streams are guided past the water nozzle at approximately the same pressure. This ensures that the desired low pressure is maintained by both air flows. In addition, only a single source of air pressure is required to generate the two air streams.
  • FIG. 1 shows a spray head 10 with a housing 11, an air nozzle element 20, a water nozzle element 30 and a swirl body 40.
  • the housing 11 has a centrally located water supply channel 12, into which water can be fed via a connecting piece 13. Furthermore, the housing has an air supply duct 14, to which air can be supplied through a connecting piece 15. The housing 11 also has a threaded bore 17 into which a fastening screw can be screwed. On the air and water outlet side, the housing is open and provided with an internal thread 16 into which the air nozzle element 20 can be screwed. The connection of connection piece 15 to the air supply duct 14 runs in a different plane and is not shown.
  • the air nozzle element 20 has an external thread 21 with which it can be screwed into the internal thread 16 of the housing 11.
  • the air nozzle element 20 has a continuous channel 23 which tapers in the direction of the nozzle bore through which the air exits during operation.
  • the air nozzle element 20 has an extension 24, on the inside of which a first fitting surface 25 is machined.
  • a plurality of bores 26 are arranged in the wall of the air nozzle element 20 between the first mating surface and the thread 21.
  • the water nozzle element 30 has a continuous channel. This is enclosed by an elongated nozzle assembly 31 which extends through the channel 23 and the nozzle bore 22 of the air nozzle element 20.
  • the wall of the nozzle assembly 31 tapers towards the water outlet opening.
  • the water nozzle element 30 has an enlarged diameter 32, on the outside of which a second fitting surface 34 is machined.
  • An extension 33 adjoins the enlarged diameter 32 and has approximately the same outside diameter as the nozzle assembly.
  • the first fit surface 25 in the extension 24 of the air nozzle element 20 interacts with the second fit surface 34 on the outside of the enlarged diameter 32 of the water nozzle element.
  • a very precise fit and consequently assignment of the air nozzle element 20 and the water nozzle element 30 is thus achieved. It is ensured that the air gap which forms in the nozzle bore 22 around the nozzle assembly 31 has a predetermined shape, in particular a constant width, in the circumferential direction.
  • a swirl body 40 is also arranged in the channel 23 of the air nozzle element 20 and is firmly fitted into the air nozzle element 20.
  • An annular air gap 41 is formed between the swirl body 40 and the nozzle assembly 31. The precise arrangement of the two nozzle elements in relation to one another can also achieve that the second annular gap has a constant width in the circumferential direction.
  • a seal 42 is pushed onto the extension 33 of the water nozzle element 30, which seals the water supply channel 12 against the air supply channel 14 after the assembly of the air nozzle element 20 and the water nozzle element 30 and screwing the air nozzle element 20 into the housing 11.
  • FIG. 3 shows the surface wetted by the two air streams 50 and 51, which are generated with the spray head 10 shown only schematically in FIG. 2.
  • the rotating air flow 50 creates a wetted surface 55.
  • the air flow 51 running parallel to the axis of rotation creates a wetted surface 56 which fills the circular ring 55.

Landscapes

  • Nozzles (AREA)
  • Air Humidification (AREA)
  • Paper (AREA)
  • Air Conditioning Control Device (AREA)
EP89110067A 1988-06-10 1989-06-03 Sprühkopf für Düsenfeuchter und Verfahren zum Befeuchten Expired - Lifetime EP0345670B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89110067T ATE79789T1 (de) 1988-06-10 1989-06-03 Spruehkopf fuer duesenfeuchter und verfahren zum befeuchten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3819762A DE3819762A1 (de) 1988-06-10 1988-06-10 Spruehkopf fuer duesenfeuchter und verfahren zum befeuchten
DE3819762 1988-06-10

Publications (3)

Publication Number Publication Date
EP0345670A2 EP0345670A2 (de) 1989-12-13
EP0345670A3 EP0345670A3 (en) 1990-09-12
EP0345670B1 true EP0345670B1 (de) 1992-08-26

Family

ID=6356264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89110067A Expired - Lifetime EP0345670B1 (de) 1988-06-10 1989-06-03 Sprühkopf für Düsenfeuchter und Verfahren zum Befeuchten

Country Status (7)

Country Link
US (1) US4946101A (enrdf_load_stackoverflow)
EP (1) EP0345670B1 (enrdf_load_stackoverflow)
AT (1) ATE79789T1 (enrdf_load_stackoverflow)
CA (1) CA1315834C (enrdf_load_stackoverflow)
DE (1) DE3819762A1 (enrdf_load_stackoverflow)
ES (1) ES2034501T3 (enrdf_load_stackoverflow)
FI (1) FI91366C (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19921592A1 (de) * 1999-05-07 2000-11-09 Voith Sulzer Papiertech Patent Applikationsvorrichtung und -verfahren für eine Papiermaschine
DE202013105121U1 (de) 2013-11-13 2013-11-21 Metso Paper, Inc. Sprühvorrichtung zum Ausgeben eines Fluids in einer Faserbahnmaschine

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1059361C (zh) 1993-02-09 2000-12-13 埃尔赫南·塔沃尔 雾化器
IL106616A (en) * 1993-08-08 1997-06-10 Elhanan Tavor Atomizer
DE19813078A1 (de) * 1998-03-25 1999-09-30 Pfeiffer Erich Gmbh & Co Kg Spender für Medien sowie Verfahren zur Herstellung eines Spenders
DE19820432A1 (de) 1998-05-07 1999-11-11 Voith Sulzer Papiertech Patent Verfahren und Vorrichtung zum Aufbringen eines Auftragsmediums auf einen laufenden Untergrund
DE19835989C5 (de) * 1998-08-08 2010-04-01 V.I.B. Systems Gmbh Verfahren und Vorrichtung zur Online-Kalandrierung von Papier
US6334579B1 (en) 1999-02-18 2002-01-01 Honeywell Measurex Devron Inc. Air atomizing nozzle
DE19949236C2 (de) * 1999-10-13 2003-05-08 Lechler Gmbh & Co Kg Zweistoff-Sprühdüse
US6699365B2 (en) 2001-10-22 2004-03-02 Abb Inc. Method of wetting webs of paper or other hygroscopic material
US6969012B2 (en) 2002-01-24 2005-11-29 Kangas Martti Y O Low pressure atomizer for difficult to disperse solutions
US6962296B2 (en) * 2002-10-16 2005-11-08 Abb Ltd. Steam water spray systems
DE10358186B4 (de) * 2003-12-12 2006-09-07 Voith Paper Patent Gmbh Verfahren zum Behandeln einer Papierbahn
DE10358185B4 (de) * 2003-12-12 2006-11-02 Voith Patent Gmbh Verfahren zum Behandeln einer Papierbahn
FI116798B (fi) 2004-07-30 2006-02-28 Metso Automation Oy Paperirainan kostutussuutin
FI121084B (fi) * 2004-12-01 2010-06-30 Metso Paper Inc Menetelmä ja sovitelma kuituradan käsittelemiseksi
FI20055394A0 (fi) 2005-07-07 2005-07-07 Metso Automation Oy Paperirainan kostutussuutin
US9186881B2 (en) * 2009-03-09 2015-11-17 Illinois Tool Works Inc. Thermally isolated liquid supply for web moistening
EP2757193A1 (en) * 2013-01-22 2014-07-23 Valmet Technologies, Inc. Spray nozzle and a method for spraying fluids in droplets for processing fibrous webs

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1087714A (fr) * 1953-11-23 1955-02-28 Procédé et dispositif de pulvérisation
DE952765C (de) * 1954-03-16 1957-04-04 V I B Appbau Ges M B H Vorrichtung zum Zerstaeuben und Auftragen von fluessigen Medien auf trockene Faserstoff-, insbesondere Papierbahnen
FR1162039A (fr) * 1955-12-10 1958-09-08 Heizmotoren G M B H Ajutage de pulvérisation
FR1273772A (fr) * 1959-11-17 1961-10-13 Curt Hiekel Jeu de buses pour appareils de pulvérisation ou de projection de peinture et dispositifs analogues
GB1210699A (en) * 1967-06-29 1970-10-28 Gulf Oil Canada Ltd Gulf Oil C Two-stage sonic atomizing device
US3688990A (en) * 1971-08-04 1972-09-05 Atlas Copco Ab Spray gun
US3908903A (en) * 1974-02-11 1975-09-30 Jr Samuel L Burns Snow making apparatus and method
DK134595B (da) * 1974-08-12 1976-12-06 Bing & Grondahl Porcelainfab Fremgangsmåde ved glasering af porcelæn og sprøjtehoved til brug ved udøvelse af fremgangsmåden.
FR2443879A1 (fr) * 1978-12-13 1980-07-11 Aerosol Inventions Dev Dispositif a effet tourbillonnaire pour la pulverisation de liquides sous pression
JPS6110775Y2 (enrdf_load_stackoverflow) * 1979-10-25 1986-04-05
JPS5795254U (enrdf_load_stackoverflow) * 1980-11-29 1982-06-11
GB8516638D0 (en) * 1985-07-01 1985-08-07 P T Chemicals Ltd Application of particles to substrate
DE3544420A1 (de) * 1985-12-16 1987-07-30 Hench Hans Vorrichtung zur erzeugung von aerosolen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19921592A1 (de) * 1999-05-07 2000-11-09 Voith Sulzer Papiertech Patent Applikationsvorrichtung und -verfahren für eine Papiermaschine
DE202013105121U1 (de) 2013-11-13 2013-11-21 Metso Paper, Inc. Sprühvorrichtung zum Ausgeben eines Fluids in einer Faserbahnmaschine

Also Published As

Publication number Publication date
FI91366C (fi) 1994-06-27
DE3819762C2 (enrdf_load_stackoverflow) 1991-04-25
ATE79789T1 (de) 1992-09-15
CA1315834C (en) 1993-04-06
EP0345670A3 (en) 1990-09-12
ES2034501T3 (es) 1993-04-01
FI892783A0 (fi) 1989-06-07
DE3819762A1 (de) 1989-12-14
EP0345670A2 (de) 1989-12-13
US4946101A (en) 1990-08-07
FI892783A7 (fi) 1989-12-11
FI91366B (fi) 1994-03-15

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