EP2135995A2 - Procédé et dispositif destinés au transfert d'une bande de matériau - Google Patents

Procédé et dispositif destinés au transfert d'une bande de matériau Download PDF

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Publication number
EP2135995A2
EP2135995A2 EP09007524A EP09007524A EP2135995A2 EP 2135995 A2 EP2135995 A2 EP 2135995A2 EP 09007524 A EP09007524 A EP 09007524A EP 09007524 A EP09007524 A EP 09007524A EP 2135995 A2 EP2135995 A2 EP 2135995A2
Authority
EP
European Patent Office
Prior art keywords
zone
sealing
transfer
material web
transfer zone
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.)
Withdrawn
Application number
EP09007524A
Other languages
German (de)
English (en)
Other versions
EP2135995A3 (fr
Inventor
Klaus Gissing
Roland Schick
Michael Janosch
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.)
Andritz AG
Original Assignee
Andritz AG
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 Andritz AG filed Critical Andritz AG
Publication of EP2135995A2 publication Critical patent/EP2135995A2/fr
Publication of EP2135995A3 publication Critical patent/EP2135995A3/fr
Withdrawn legal-status Critical Current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
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
    • D21F5/046—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices using pocket ventilation systems

Definitions

  • the subject of this invention is a device for transferring a material web, in particular paper, cardboard, tissue or another fibrous web from a first support surface, for example a drying cylinder, to a subsequent support surface, for example a suction roll.
  • the device comprises a transfer zone which can be subjected to negative pressure and at least one sealing device with sealing lips.
  • the subject of this invention also forms a method for transferring a material web, which is carried out with the device according to the invention.
  • Such web transfer devices are used, for example, in the dryer section of paper machines. These drying sections usually consist of a number of drying cylinders and suction rolls, which are each arranged in a row.
  • the web to be dried runs meandering mostly supported by an air-permeable support belt from a first drying cylinder to a suction roll and to another drying cylinder.
  • the web is thereby guided around with the help of vacuum around the suction roll.
  • the web In the areas between the drying cylinders and the suction rolls, the web must be transferred. This transfer is done with special railway transfer facilities. That's how it describes EP 1 788 153 A2 a railroad transfer box having a transfer zone divided into a take-off zone and a stabilization zone.
  • the material web and the support band are removed by means of negative pressure from the drying cylinder and in the immediately following stabilization zone, the material web and the support band are stabilized by means of negative pressure.
  • the removal zone is sealed by seals against the environment and against the stabilization zone.
  • the two negative pressures in the take-off zone and the stabilization zone are separately adjustable and adjustable, wherein in practice usually the negative pressure in the take-off zone is higher than in the stabilization zone.
  • the EP 1 367 173 A2 and the DE 10 2004 036 845 A1 disclose railway transfer boxes with a sealing device having a plurality of sealing lips.
  • the invention is therefore based on the object to provide a web transfer device and a transfer method by which, even at high machine speeds, a good sealing of the negative pressure in the transfer area is made possible.
  • This object is achieved by a device in which the transfer zone is limited or subdivided by the sealing device and a space between the sealing lips of the sealing device can be aspirated via an opening.
  • a higher negative pressure in the transfer zone can be set, or can be used by the reduced leakage air fraction through the sealing device into the transfer zone, a lower performance suction unit, which leads to energy savings.
  • the suction between the individual sealing lips also leads to an improved concern of the seal on the material web to be transferred or on a support band, since the individual sealing lips suck on the web.
  • the material web is supported in the transfer zone by a support band, which is preferably permeable to air.
  • the support band gives the material web additional hold.
  • the sealing lips of the sealing device form a labyrinth seal.
  • the labyrinthine arrangement of the individual sealing lips, the seal can be significantly improved.
  • the transfer zone comprises a decrease zone and a subsequent stabilization zone.
  • the negative pressures in the two zones can then be chosen so that the material web is removed as possible at the tangent point of the first support surface and is optimally guided and stabilized in the stabilization zone. It makes sense here if the sealable sealing device limits the take-off zone, while it can also be arranged between the take-off zone and the stabilization zone.
  • the decom- position zone is usually pressurized with a higher negative pressure than the stabilization zone, so that a good sealing of the decompression zone is particularly desirable.
  • the sealing device is pivotally mounted. By a pivoting sealing device maintenance or a support band change can be easily performed.
  • the invention also provides a corresponding method for transferring a material web, wherein a sealing device of the transfer zone is evacuated. Through the suction of the sealing device, a certain level of vacuum in the transfer zone can be ensured during the entire production process.
  • FIG. 1 the railway transfer device 5 according to the invention is shown.
  • a material web 1 coming from the right is supported by a support belt 2 and guided over a first support surface 3.
  • This first support surface 3 is a rotating and heated drying cylinder in the present example.
  • the material web 1 and the support belt 2 is removed by the web transfer device 5 of the first support surface 3 and transferred to the subsequent support surface 4.
  • the web transfer device 5 is subjected to negative pressure, thereby the material web 1 and the support band 2 is sucked away from the first support surface 3 and stabilized until transfer to the subsequent support surface 4.
  • the transfer zone 6 is sealed on one side by the evacuated sealing device 10 over the entire machine width.
  • the following support surface 4 is in the present case a rotating suction roll, around which the material web 1 and the support belt 2 are guided by means of negative pressure. After the suction roll, the material web 1 and the support belt 2 is transferred to another drying cylinder. The directions of rotation of the two drying cylinders and the suction roller are indicated by arrows.
  • FIG. 2 is the evacuated sealing device 10 from Fig. 1 shown in detail, wherein the same reference numerals designate the same components in all figures.
  • the sealing device 10 consists of a plurality of sealing lips 11. These may have a blade-like shape or they may form a labyrinth seal.
  • the sealing lips can be made of silicone, Teflon or another plastic.
  • a space 12 is formed between the sealing lips 11, a space 12 is formed.
  • the air in the space 12 is sucked according to the invention via the opening 7 in the sealing lip holder.
  • the flow direction 13 of the extracted air is shown by arrows.
  • the negative pressure acting between the sealing lips 11 ensures a uniform contact of the sealing lips 12 on the support band 2, since the sealing device 10 sucks on the support band.
  • Incoming leakage air is sucked through the opening 7.
  • the two arrows 8 are intended to represent the negative pressure flow.
  • the negative pressure within the sealing device 10 and the negative pressure in the transfer zone 6 can be generated by the same vacuum blower. However, it is also conceivable that the two negative pressures are generated by separate systems.
  • the sealing device 10 may also have a plurality of openings 7, which are arranged, for example, at regular intervals transversely to the machine direction.
  • the opening 7 may also communicate directly with the transfer zone 6, whereby the leakage air is sucked in the space 12 through the opening 7 in the transfer zone 6.
  • a throttle may be mounted, through which a lower negative pressure in the space 12 than in the transfer zone 6 can be adjusted.
  • the web transfer device 5 comprises two sealing devices 10 and 10 '.
  • the transfer zone 6 is subdivided into a take-off zone 6 'and a stabilization zone 6 "These two zones (6', 6") are separated by the sealing device 10 '.
  • a further seal 14 may also be present, in this case there is a further zone between the sealing device 10 'and the seal 14, which may have a different pressure than the removal zone 6' and the stabilization zone 6 ". that the pressure can be adjusted in this further zone, for example via a diaphragm In the removal zone 6 ', the material web 1 and the support belt 2 from the first support surface 3 by negative pressure decreased.
  • the material web 1 and the support belt 2 are stabilized by means of negative pressure.
  • the negative pressure in the removal zone 6 ' is preferably higher than the negative pressure in the stabilization zone 6".
  • the pressure conditions in the take-off zone 6 'and in the stabilization zone 6 " are separately adjustable and adjustable FIG. 3 sucked, but it is also conceivable that only one of the two sealing means 10, 10 'is evacuated. It is also conceivable that the seal 14 is sucked.
  • FIG. 4 the sealing devices 10 and 10 'are made Fig. 3 shown in detail. It can be seen clearly that the space 12 between the sealing lips 11 can be aspirated through the opening 7.
  • the sealing device 10 ' is connected via the flow channel 9 with a vacuum system in combination.
  • the two sealing devices 10 and 10 ' may be connected to the vacuum system of the take-off zone, but it is also possible for both or a sealing devices 10 and / or 10' to be connected to a separate vacuum system or to the vacuum system of the stabilization zone 6 " in the stabilization zone 6 "can also be generated via the vacuum system of the suction roll.
  • the sealing devices 10 and 10 ' can be pivoted via a joint 15 and 15'.
  • the dotted lines show the sealing devices 10 and 10 'in their swung-out position. This pivotability of the sealing device 10, 10 'facilitates maintenance work and the replacement of the support belt 2. It is also possible that the sealing devices can be pivoted to the bottom (not shown).
  • the invention also includes other embodiments in which, for example, the pivotable or evacuated sealing device 10, 10 'limits the stabilization zone 6 " Transfer of a material web 1 in the field of a finishing or winding machine of a paper machine is used.
  • the web transfer device 5 according to the invention can be used in all processes in which a material web 1 by means of negative pressure from a first support surface 3, which may also be a plane to a subsequent support surface 4, which must not be evacuated is transferred.

Landscapes

  • Advancing Webs (AREA)
  • Replacement Of Web Rolls (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Paper (AREA)
EP09007524.3A 2008-06-17 2009-06-08 Procédé et dispositif destinés au transfert d'une bande de matériau Withdrawn EP2135995A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0096108A AT506409B1 (de) 2008-06-17 2008-06-17 Vorrichtung und verfahren zur überführung einer materialbahn

Publications (2)

Publication Number Publication Date
EP2135995A2 true EP2135995A2 (fr) 2009-12-23
EP2135995A3 EP2135995A3 (fr) 2013-06-12

Family

ID=41057741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09007524.3A Withdrawn EP2135995A3 (fr) 2008-06-17 2009-06-08 Procédé et dispositif destinés au transfert d'une bande de matériau

Country Status (5)

Country Link
US (1) US20090308555A1 (fr)
EP (1) EP2135995A3 (fr)
CN (1) CN101607647A (fr)
AT (1) AT506409B1 (fr)
RU (1) RU2009122356A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015207284B4 (de) * 2015-04-22 2021-05-27 Voith Patent Gmbh Dichtungselement und Dichtungseinrichtung für eine Bahnstabilisierungseinrichtung
IL298940A (en) 2020-06-09 2023-02-01 Global Thermostat Operations Llc Continuous-direct motion air capture system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1367173A2 (fr) 2002-05-30 2003-12-03 Mitsubishi Heavy Industries, Ltd. Caisse aspirante d'un sécheur
DE102004036845A1 (de) 2004-07-29 2006-03-23 Voith Paper Patent Gmbh Dichtungsanordnung
EP1788153A2 (fr) 2005-11-19 2007-05-23 Voith Patent GmbH Dispositif pour le traitement d'une bande de matériau

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648383A (en) * 1969-12-01 1972-03-14 Eastman Kodak Co Sealing apparatus for transport of material between regions at different pressures
FI59637C (fi) * 1979-11-20 1981-09-10 Valmet Oy Anordning i torkpartiet av en pappersmaskin
DE4141296A1 (de) * 1991-12-14 1993-06-17 Voith Gmbh J M Vorrichtung zur abnahme einer bahn von einem trockenzylinder
DE4404726C2 (de) * 1993-03-11 1996-04-25 Voith Gmbh J M Taschenventilation in einem Zwei-Sieb-Zylindertrockner
US5515619A (en) * 1993-08-06 1996-05-14 J.M. Voith Gmbh Flexibly mounted sealing strips of a vacuum roll for a web dryer
US5600897A (en) * 1993-08-06 1997-02-11 J.M. Voith Gmbh Mixed dryer section including single-tier and double-tier drying groups with automatic ropeless threading
DE29506620U1 (de) * 1995-04-19 1995-06-08 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Saugwalze
DE29601543U1 (de) * 1996-01-30 1996-03-28 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Vorrichtung zum Führen einer Faserstoffbahn in einer einreihigen Trockenpartie
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
FI110625B (fi) * 1999-02-22 2003-02-28 Metso Paper Inc Puhalluslaite paperikoneessa tai vastaavassa
DE10140800A1 (de) * 2001-08-20 2003-03-06 Voith Paper Patent Gmbh Vorrichtung zur Behandlung einer Faserstoffbahn

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1367173A2 (fr) 2002-05-30 2003-12-03 Mitsubishi Heavy Industries, Ltd. Caisse aspirante d'un sécheur
DE102004036845A1 (de) 2004-07-29 2006-03-23 Voith Paper Patent Gmbh Dichtungsanordnung
EP1788153A2 (fr) 2005-11-19 2007-05-23 Voith Patent GmbH Dispositif pour le traitement d'une bande de matériau

Also Published As

Publication number Publication date
RU2009122356A (ru) 2010-12-20
CN101607647A (zh) 2009-12-23
US20090308555A1 (en) 2009-12-17
EP2135995A3 (fr) 2013-06-12
AT506409B1 (de) 2009-09-15
AT506409A4 (de) 2009-09-15

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