EP0640716B1 - Aménagement pour guider une bande fibreuse dans un séchoir - Google Patents

Aménagement pour guider une bande fibreuse dans un séchoir Download PDF

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Publication number
EP0640716B1
EP0640716B1 EP94109372A EP94109372A EP0640716B1 EP 0640716 B1 EP0640716 B1 EP 0640716B1 EP 94109372 A EP94109372 A EP 94109372A EP 94109372 A EP94109372 A EP 94109372A EP 0640716 B1 EP0640716 B1 EP 0640716B1
Authority
EP
European Patent Office
Prior art keywords
arrangement
accordance
suction box
web
support band
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
EP94109372A
Other languages
German (de)
English (en)
Other versions
EP0640716A3 (fr
EP0640716A2 (fr
Inventor
Peter Kahl
Karl-Heinz Klein
Helmut Grimm
Wolfgang Müller
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.)
Voith Patent GmbH
Original Assignee
Voith Sulzer Papiertechnik Patent 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 Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Sulzer Papiertechnik Patent GmbH
Priority to CA 2129597 priority Critical patent/CA2129597A1/fr
Priority to JP21517994A priority patent/JPH07167558A/ja
Priority to BR9402703A priority patent/BR9402703A/pt
Priority to FI943654A priority patent/FI943654A/fi
Priority to US08/303,654 priority patent/US5515619A/en
Publication of EP0640716A2 publication Critical patent/EP0640716A2/fr
Publication of EP0640716A3 publication Critical patent/EP0640716A3/fr
Application granted granted Critical
Publication of EP0640716B1 publication Critical patent/EP0640716B1/fr
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
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine

Definitions

  • the invention relates to an arrangement for guiding a to be dried Fibrous web, together with a porous support tape through a drying device in detail with those in the preamble of claim 1 specified features.
  • the air guide box is designed as a suction box.
  • a preferably mechanical deflection device which consists of DE-PS 3706542 is known to be from the sieve or support belt introduced air boundary layer not in the direction of the deflection roller but immediately to the top, between the drying cylinders be dissipated, so that the negative pressure more energy can be kept low in the suction box.
  • This construction has the disadvantage that it is only insufficient Seal between the space between the outer wall of the suction box and the support belt and the deflecting roller, in particular between drain gusset and suction chamber of the suction box is so that false air is sucked in and thereby the negative pressure, who is supposed to hold the paper web on the support belt is, or even overpressure is generated.
  • the invention has for its object in a drying device an arrangement for guiding a fibrous web to be dried to improve so that the web to be dried better than before and yet with as little energy consumption as possible Support band is held. For this, at least one of the both gussets better sealed against the supply of false air even if the external suction box is inaccurate is manufactured and / or bends.
  • the use of a doctor blade as Sealing strip has the advantage that the sealing point in relative can be a short distance from the point where the sieve belt of the deflection roller runs and / or runs.
  • the doctor blade is freely stored and only at its ends, on one side, for example by a screw, and on the other side, clamped by a spring, so that the Blade can expand freely and vibrations can be avoided.
  • the blade can be made of plastic. She is a commercially available component and therefore easier to manufacture and to assemble than those longitudinal sealing strips, which from the state of the Technology are known. To achieve the best possible seal, are preferably two longitudinal sealing strips according to the invention provided, namely one in the gusset and one in in the gusset.
  • the arrangement according to the invention is mainly in the area between two drying cylinders one row and only one only support band having a dryer group to be arranged.
  • Fig. 1 are two adjacent drying cylinders 11 and 12 as well a deflection roller 10 arranged between and below.
  • the roll shell 10a has radially continuous perforations, i.e. Bores 13 on.
  • the Circumferential grooves are also incorporated into the outer surface of the roll shell be that intersect the holes 13.
  • a support belt 15 runs from the first drying cylinder 11 on a tangential, straight path to the deflection roller 10 and from this to the second drying cylinder 12.
  • the underside of the paper web comes in contact with the drying cylinders 11, 12 and the top of the paper web with the support band 15.
  • the suction box 14 has a first outer wall 17 that extends along the path of the support belt 15 from the cylinder 11 to the deflection roller 10 extends.
  • the deflection device 16 as a squeegee is formed because it redirects the air only mechanical means (squeegees) to be used need.
  • FIG. 1 to 3 is shown by dash-dotted lines, that the deflector designed as a squeegee 16 can be pivoted. In a raised position Condition (paper machine at a standstill) can be changed Pull the support band through the opening thus formed.
  • This bar 16 can be made of plastic or e.g. formed from a strip of felt his.
  • An air suction channel runs through the suction box 14 in the longitudinal direction 18, which is preferably tubular. This extends over at least one of the two ends of the suction box 14 the end wall 19 also, as can be seen from Fig. 4.
  • a partition 33 which is more preferred Execution is a tubular channel, in those already mentioned Air suction duct 18, to be installed centrally to form a suction duct create that alone the edge zone R indicated in FIG. 4 sucked.
  • the suction is done with the above, not in Fig. 3 illustrated, suction fan.
  • the air suction duct 18 is also the supporting element of the Suction box 14.
  • the air suction duct, also known as a so-called support tube 18 is received in a support 30 which is connected to the Bearing housing 31 for the deflecting roller 10 is connected.
  • Support band and The outer wall are at least approximately parallel to one another arranged.
  • the first wall 17 relative to Arrange the support band slightly inclined so that the support band 15 and the first wall diverge somewhat. It can Development of the negative pressure in the gap between the support band and favor the first wall, so that here too in this Area the paper web remains on the support belt 15.
  • the suction box 15 also has a second wall 26, which also like the wall 17 parallel to the screen belt, but also from this somewhat divergent, can run.
  • Both walls 17 and 26 tangentially enclose the support tube 18. As a result, an upper chamber 34 has been created.
  • Fig. 2 it is indicated that the from the interior of the suction box, in particular the one sucked out of the air suction duct 18 Air is blown back into this upper chamber and through an air blowing opening 35 flows outward. It is located in the area of the run-up point, i.e. where the paper web with the support belt 15 runs onto the second drying cylinder 12.
  • the blowing direction through the air blowing opening 35 is at least approximated tangential to the jacket of the second drying cylinder.
  • Air blowing opening 35 a blown air baffle 36 attached (see Fig. 2).
  • brackets 40 for additional side seals 25, (e.g. through felts) against false air.
  • end seals e.g. felts
  • the lower outer wall 21 runs along the free peripheral part the deflecting roller 10 and usually has several central Openings 22 on. From here the negative pressure spreads through the bores 13 of the deflecting roller 10 running past it, to the inside of the deflecting roller 10. From here the the negative pressure continues into, from the surrounding support band 15 and the paper web covered holes 13, whereby the Paper web is sucked securely onto the support belt 15 in this area becomes.
  • Fig. 1 In the embodiment shown in Fig. 1 are on the bottom of the suction box 14 two longitudinal sealing strips 28 u. 29 attached, each with a sealing strip in one of the gussets protrudes (longitudinal sealing strip 28 protrudes into the gusset 23, Longitudinal sealing strip 29 projects into the drain gusset 24).
  • the sealing strips are in the manner of a doctor blade, for example. out Made of plastic and resiliently held on the suction box 14. They are at least approximately tangential to the roll shell 10a.
  • the flat holder 37 is arranged on the suction box 14 so that it with the adjoining outer wall 17 and / or 26 at least one approximates smooth surface. This has the great advantage that there are no steps and edges and therefore none Paper residues can stick to it.
  • This smooth surface is at least approximately parallel to that in the essentially straight path of the support belt 15. But it can make a small angle with this too.
  • peripheral seals are on the end walls 19 of the suction box 25 provided (see Fig. 4).
  • the suction box 14 itself can, if necessary, to a Point P can be swiveled to make it slightly from the first To remove drying cylinder 11.
  • the pivoting can, for. B. if the squeegee 16 is not can be swiveled up when necessary when the machine is at a standstill a new support band 15 must be drawn in, or any incident occurs.
  • the suction box 14 has at one of its two ends, as shown in Fig. 4, in the range for threading the A web edge strip serving as a web by means of an intermediate wall 38 delimited edge zone R, which at times is solely due to the vacuum wave can be connected.
  • the deflecting roller 10 in the area of the above and shown in Fig. 4 edge zone R of Suction box also an edge zone, that of the rest of the inside of the roller through an intermediate wall rotating with the roller jacket 10a 39 is separated.
  • valve (Flap) 41 arranged, preferably in the area outside the suction box 14 so that a drive for actuation of the valve slightly on the outside of the suction channel 18 can be arranged. If the valve is closed, the said edge zone is suctioned off only by connection to the Vacuum source.
  • FIG. 3 Here is one longitudinal sealing strip according to the invention 28 mm only in the overrun gusset 23 present, while in the gusset 24 a felt sealing strip 29a is provided.

Landscapes

  • Paper (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (16)

  1. Agencement pour guider une bande fibreuse à sécher conjointement avec un ruban de support poreux (15) à travers un dispositif de séchage, comprenant les caractéristiques suivantes :
    a) l'agencement sert à guider la bande et le ruban de support (15) sur un parcours essentiellement droit depuis un cylindre de séchage (11) pouvant être chauffé, qui est entouré sur une partie de sa périphérie par la bande et le ruban de support et vient ainsi en contact avec la bande, jusqu'à un cylindre déflecteur (10), qui est entouré, sur une partie de sa périphérie, par le ruban de support et la bande et vient ainsi en contact avec le ruban de support;
    b) l'enveloppe périphérique de cylindre (10a) du cylindre déflecteur (10) présente des évidements, de préférence des perforations (13), qui peuvent être raccordées à une source de dépression au moyen d'une caisse aspirante externe (14), qui est disposée sur la partie de la périphérie du cylindre déflecteur exempte du ruban de support (15) et de la bande;
    c) la caisse aspirante (14) présente une première paroi externe (17), qui s'étend le long du parcours mentionné et possède, dans la zone du point de sortie (A) du cylindre (11), un dispositif de déviation (16), qui s'étend transversalement à la direction d'avance de la bande sur toute la longueur de la caisse aspirante et sert à dévier la couche limite d'air entraínée par le ruban de support (15);
    d) la caisse aspirante (14) possède, en face de la partie périphérique libre du cylindre déflecteur (10), au moins une ouverture d'aspiration avec des nervures d'étanchéité, qui coopèrent avec l'enveloppe périphérique du cylindre (10a), dont au moins une nervure d'étanchéité longitudinale (28 et/ou 29) s'étendant transversalement à la direction d'avance de la bande à travers le "coin de sortie" (24);
    e) caractérisé en ce qu'au moins une nervure d'étanchéité longitudinale (28 et/ou 29) est conçue comme une lame de racloir et est fixée de manière flexible élastiquement sur la caisse aspirante (14), en s'appuyant au moins approximativement tangentiellement contre l'enveloppe périphérique du cylindre (10a).
  2. Agencement selon la revendication 1, caractérisé en ce qu'une nervure d'étanchéité longitudinale (28, 29) conçue comme une lame de racloir est prévue tant dans le "coin d'entrée" (23) que dans le "coin de sortie" (24).
  3. Agencement selon la revendication 1 ou 22, caractérisé en ce que chaque nervure d'étanchéité longitudinale (28 et/ou 29) conçue comme une lame de racloir est fixée de manière flexible élastiquement sur la caisse aspirante (14) de telle sorte qu'elle ne s'appuie que doucement, c'est-à-dire avec une force de pression au moins approximativement nulle, contre l'enveloppe périphérique du cylindre (10a).
  4. Agencement selon la revendication 1, 2 ou 3, caractérisé en ce qu'au moins une des deux nervures d'étanchéité longitudinales (28, 29) est fixée au moyen d'une attache (37a) élastiquement flexible en forme d'arc (vue en section transversale), sur la caisse aspirante (14).
  5. Agencement selon la revendication 1, 2 ou 3, caractérisé en ce qu'au moins une des deux nervures d'étanchéité longitudinales (28, 29) est fixée au moyen d'une attache (37) plate (vue en section transversale), sur la caisse aspirante.
  6. Agencement selon la revendication 5, caractérisé en ce que l'attache plate (37) forme avec la paroi extérieure s'y raccordant (17, 26) une surface au moins approximativement lisse.
  7. Agencement selon la revendication 5 ou 6, caractérisé en ce que l'attache plate (37) est élastiquement flexible.
  8. Agencement selon la revendication 6 ou 7, caractérisé en ce que la surface lisse est au moins approximativement parallèle à la trajectoire essentiellement droite du ruban de support (15) ou forme avec celui-ci un petit angle.
  9. Agencement selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la caisse aspirante, vue en section transversale, peut pivoter autour d'un axe de rotation (P) qui s'étend transversalement à la direction d'avance de la bande et qui se trouve à proximité de la nervure d'étanchéité longitudinale (29) se trouvant dans le coin de sortie (24).
  10. Agencement selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le dispositif de déviation (16) est formé en tant que nervure de grattage.
  11. Agencement selon la revendication 10, caractérisé en ce que la nervure de grattage (16) peut être légèrement éloignée du ruban de support (15) guidé par le cylindre de séchage (11).
  12. Agencement selon la revendication 11, caractérisé en ce que la nervure de grattage (16) est montée de manière pivotable.
  13. Agencement selon l'une quelconque des revendications 1 à 12, caractérisé en ce que la bande de papier et le ruban de support (15) vont du cylindre déflecteur (10) à un deuxième cylindre de séchage (12), et en ce que la caisse aspirante (14) présente, dans la zone de la position d'entrée (sur le deuxième cylindre de séchage), au moins une ouverture de soufflage d'air (35), dont la direction du soufflage est au moins approximativement tangentielle à l'enveloppe périphérique du deuxième cylindre de séchage (12).
  14. Agencement selon la revendication 13, caractérisé en ce qu'entre l'ouverture de soufflage d'air (35) et le dispositif de déviation (16) est prévue une paroi de guidage de l'air de soufflage (36).
  15. Agencement selon l'une quelconque des revendications 1, 4, 5 ou 13, caractérisé en ce que la caisse aspirante (14) présente, en tant qu'élément porteur, un tube porteur (18) formé en tant que canal d'aspiration d'air, dans lequel une paroi de séparation (33) est disposée pour former deux canaux d'aspiration.
  16. Agencement selon la revendication 15, caractérisé en ce que la paroi de séparation (33) est tubulaire.
EP94109372A 1993-08-06 1994-06-17 Aménagement pour guider une bande fibreuse dans un séchoir Expired - Lifetime EP0640716B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CA 2129597 CA2129597A1 (fr) 1993-08-06 1994-08-05 Systeme pour guider une bande de papier a secher
JP21517994A JPH07167558A (ja) 1993-08-06 1994-08-05 乾燥すべき繊維材料リボンを案内する装置
BR9402703A BR9402703A (pt) 1993-08-06 1994-08-05 Arranjo mecânico para guiar uma folha de massa fibrosa a ser secada
FI943654A FI943654A (fi) 1993-08-06 1994-08-05 Järjestely kuivattavan kuituaineradan ohjaamiseksi
US08/303,654 US5515619A (en) 1993-08-06 1994-09-09 Flexibly mounted sealing strips of a vacuum roll for a web dryer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10276693A 1993-08-06 1993-08-06
US102766 1993-08-06

Publications (3)

Publication Number Publication Date
EP0640716A2 EP0640716A2 (fr) 1995-03-01
EP0640716A3 EP0640716A3 (fr) 1996-01-31
EP0640716B1 true EP0640716B1 (fr) 2000-11-02

Family

ID=22291576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94109372A Expired - Lifetime EP0640716B1 (fr) 1993-08-06 1994-06-17 Aménagement pour guider une bande fibreuse dans un séchoir

Country Status (4)

Country Link
EP (1) EP0640716B1 (fr)
AT (1) ATE197329T1 (fr)
DE (1) DE59409573D1 (fr)
ES (1) ES2152275T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6772533B2 (en) 2001-03-06 2004-08-10 Metso Paper, Inc. Arrangement in the drying section of a paper machine

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29613809U1 (de) * 1996-08-09 1996-09-26 Voith Sulzer Papiermasch Gmbh Vorrichtung zum Trocknen einer Faserstoffbahn
DE19714758A1 (de) * 1997-04-10 1998-10-15 Voith Sulzer Papiermasch Gmbh Vorrichtung zum Führen einer Materialbahn
EP0872592B1 (fr) * 1997-04-17 2006-01-11 Voith Paper Patent GmbH Dispositif pour le traitement d'une bande fibreuse et système assurant l'étanchéité d'une telle installation
US6192597B1 (en) 1997-04-17 2001-02-27 Voith Sulzer Papiermaschinen Gmbh Device for treating a fibrous pulp web as well as a sealing device for a device of this kind
DE19848816A1 (de) 1998-10-22 2000-04-27 Voith Sulzer Papiertech Patent Wickelmaschine
DE10319988A1 (de) * 2003-05-06 2004-11-25 Voith Paper Patent Gmbh Vorrichtung zum direkten Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn
DE102008041823A1 (de) * 2008-09-05 2010-03-11 Voith Patent Gmbh Trockenpartie
DE102015207284B4 (de) 2015-04-22 2021-05-27 Voith Patent Gmbh Dichtungselement und Dichtungseinrichtung für eine Bahnstabilisierungseinrichtung
CN111578687B (zh) * 2020-05-31 2021-09-14 宁波太平洋印染有限公司 一种用于纺织的染色烘干机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI80491C (fi) * 1987-09-02 1990-06-11 Valmet Paper Machinery Inc Foerfarande och torkningsgrupp i maongcylindertorken av en pappersmaskin.
DE3910600C2 (de) * 1989-04-01 1993-10-07 Voith Gmbh J M Ein-Sieb-Trockengruppe
DE4314475A1 (de) * 1993-05-03 1993-12-23 Voith Gmbh J M Anordnung zum Führen einer zu trocknenden Bahn
DE4401378A1 (de) * 1994-01-19 1994-06-01 Voith Gmbh J M Trockenpartie für eine Papiermaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6772533B2 (en) 2001-03-06 2004-08-10 Metso Paper, Inc. Arrangement in the drying section of a paper machine

Also Published As

Publication number Publication date
EP0640716A3 (fr) 1996-01-31
ES2152275T3 (es) 2001-02-01
ATE197329T1 (de) 2000-11-15
DE59409573D1 (de) 2000-12-07
EP0640716A2 (fr) 1995-03-01

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