EP1285992B1 - Device for treating a fibrous web - Google Patents

Device for treating a fibrous web Download PDF

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Publication number
EP1285992B1
EP1285992B1 EP02011797A EP02011797A EP1285992B1 EP 1285992 B1 EP1285992 B1 EP 1285992B1 EP 02011797 A EP02011797 A EP 02011797A EP 02011797 A EP02011797 A EP 02011797A EP 1285992 B1 EP1285992 B1 EP 1285992B1
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EP
European Patent Office
Prior art keywords
sealing
holder
sealing element
blade
web
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 - Fee Related
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EP02011797A
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German (de)
French (fr)
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EP1285992A1 (en
Inventor
Peter Kahl
Uwe Joos
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Voith Patent GmbH
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Voith Patent GmbH
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Publication date
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Publication of EP1285992A1 publication Critical patent/EP1285992A1/en
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    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/906—Seal for article of indefinite length, e.g. strip, sheet

Definitions

  • the invention relates to a device for treating a fibrous web such as in particular a paper and / or board web, in which the fibrous web is guided along at least one support belt, in particular a dewatering belt, press belt, wire and / or the like via at least one moving or stationary support surface and on the side facing away from such a support surface side of the fibrous web at least one sealing device is provided which comprises a received in a holder sealing element, which is arranged in close proximity to the support band, without touching it, wherein the sealing element laterally, ie can be led out of the holder transversely to the web running direction.
  • Such devices with contactable sealing bodies are for example in the DE-A-197 16 131.6 , of the US-B-6,247,247 as well as the US-A-4,185,399 described.
  • the sealing device in question is often provided in the area of a ventilation device, in particular a stabilizer box or the like.
  • an additional vacuum zone can be provided in the upper region of such a stabilizer box.
  • a particular fixedly mounted on the box seal can be provided.
  • the aim of the invention is to provide a device of the type mentioned, in which the sealing element can be easily replaced, d. H. replacement is also possible without removal of the stabilizer box. If necessary, such a change should also be possible behind the chair part.
  • a device for treating a fibrous web such as in particular a paper and / or board web, in which the fibrous web together with at least one support belt, in particular a dewatering belt, press belt, wire and / or the like is guided over at least one moving or stationary support surface and on the side facing away from such a support surface side of the fibrous web at least one sealing device is provided which comprises a received in a holder sealing element, which is arranged in close proximity to the support band without touching it, that is, while maintaining a gap between the sealing element and the support band, wherein the sealing element laterally, ie transversely to the web running direction, can be led out of the holder.
  • the wear part forming a sealing element can thus be easily pulled laterally out of the holder, without having to adjacent facilities of the paper machine, in particular an adjacent stabilizer box or the like must be removed with. It may be necessary to remove a side seal, a side cover or a side air knife before pulling out the sealing element, but this is possible with minimal effort.
  • the holder is expediently provided with a corresponding guide along which the sealing element can be pulled laterally out of the holder.
  • the sealing device can be provided, for example, in the region of a ventilation device used in particular in a press section or a dry party, such as, in particular, a steam blower box, a suction box, a stabilizer, ventilation installations and / or the like.
  • a ventilation device used in particular in a press section or a dry party, such as, in particular, a steam blower box, a suction box, a stabilizer, ventilation installations and / or the like.
  • the sealing element is formed by a flexible sealing blade.
  • the sealing blade received on the edge in the holder is acted upon by a contact pressure element so that it is arched out of the maintenance and / or change position towards the support band and thereby assumes its operating position, in which a sealing portion in the immediate vicinity of Support band is.
  • the unloaded sealing blade received at the edge in the holder is advantageously at least substantially planar, with which point it assumes its maintenance or replacement position.
  • the distance of the sealing portion of the sealing element is adjustable to the support band on the contact pressure.
  • the pressing element is preferably formed by a Anpressklinge, which advantageously has a greater rigidity than the sealing blade.
  • the pressing element can be accommodated, for example, in a recess of a support, which is preferably formed by an air-technical device.
  • the recess may be at least partially covered by the Anpressklinge.
  • the pressing element is also laterally, d. H. can be led out of the holder transversely to the direction of web travel.
  • the holder may be provided again with a corresponding guide.
  • both the sealing element and the pressing element can be pulled laterally out of the holder provided with corresponding guides and thus laterally out of the paper machine.
  • the holder can be adjusted via at least one actuator, for. B. be pivoted.
  • actuator for. B. be pivoted.
  • the use of hydraulic, pneumatic and / or electromechanical actuators is conceivable.
  • the holder may for example also be hinged, so that the sealing element is removable after opening the holder from this.
  • the sealing device separates in an air-technical device two zones which can be acted upon with different pressure.
  • sealing device in combination with a ventilation device used in the drying section, for. B. stabilizer box, as viewed in the web running direction second seal is provided in particular over the machine width, in particular to separate an upper and a lower vacuum zone from each other.
  • the two vacuum zones can be connected, for example, with separate vacuum sources.
  • inlet-side seal can be formed for example by a flexible, floating seal, a mechanical sealing strip or an air knife.
  • the sealing device can in particular also for other vacuum boxes, z. B. in the press section, be provided.
  • the sealing element is expediently in operation by a lock, z. B. locking pin (etc.), secured against lateral slipping.
  • the holder for the sealing element having the holder may be rigid or resilient or resiliently connected to the ventilation device.
  • the sealing element is provided with a crowning, that is viewed over the machine width at a different distance from the support belt, for example sieve has.
  • a sieve deflection between edge and center can be compensated.
  • the sealing element may in particular made of plastic, for. As fiberglass, Teflon, CFRP or the like, or of another plastic, or made of metal.
  • the two vacuum zones may be laterally sealed, for example, via air knives and / or mechanical cover plates, which are removable or adjustable, in particular displaceable, for releasing the sealing element.
  • the sealing element may extend over the entire machine width or even over only a part of the machine width or be divided in width into at least two zones.
  • FIG. 1 shows a schematic partial view of a drying section of a device for treating a fibrous web with two seals provided in the region of a drying cylinder in the upper region of a stabilizer box to form an upper and a lower vacuum zone.
  • the device in question is used to treat a fibrous web 10 such as in particular a paper and / or board web.
  • Fig. 1 two successive drying cylinders 12, 14 are indicated, which rotate in the direction of arrows F and over which, together with the fibrous web 10, a support belt 16 is guided, which is formed in the present case by a drying wire.
  • the guided along with the fibrous web 10 first on the left drying cylinder 12 support belt 14 runs with the fibrous web 10 in a discharge area A from the outer peripheral surface of the drying cylinder 12 formed support surface 18 to then in the web running direction L, for example, by a merely indicated outer stabilizer box 20 sucked perforated and / or grooved guide roller 22 to be supplied.
  • the stabilizer box 20 may in particular be a suction box or the like.
  • the sealing arrangement described in more detail below can also be provided in the area of other ventilation devices.
  • a first seal 24 is provided in the web running direction L before the discharge area A.
  • This first, inlet-side seal can be, for example, a flexible, floating seal, a mechanical sealing strip or an air knife.
  • a second seal or sealing device 26 arranged downstream of the drain region A is provided so that an upper and a lower vacuum zone 28 or 30 result.
  • the lower vacuum zone 30 serves to stabilize the web guide.
  • the upper vacuum zone 28 serves in particular as so-called "ProRelease" - or detachment zone. The arrangement thus serves a total of a controlled detachment and stabilization of the fibrous web 10th
  • the sealing device 26 comprises a sealing element received in a holder 34 (cf., in particular, also FIGS. 2 and 3), which in the following case is designed as a flexible sealing blade 35.
  • the sealing blade 35 between an operating position / cf. 2) in which a sealing portion 36 of the sealing element 34 is arranged in the immediate vicinity of the support band, and a maintenance and / or change position (see FIG. 3) adjustable, in which the sealing portion 36 has a greater distance from the support band 16.
  • the sealing blade 35 in particular when it assumes its maintenance or change position, laterally, d. H transversely to the web running direction L, led out of the holder 34.
  • This forming a wear part sealing blade 35 can thus be easily pulled laterally out of the holder 34, without requiring the stabilization box 20 must be removed.
  • a side cover, a side air knife or the like must be removed, but this is possible with minimal effort.
  • the holder 34 which is provided in the present case on the stabilizer box 20, is provided with a corresponding guide 37, along which the sealing blade 35 can be pulled laterally out of the holder 34.
  • the sealing blade 35 is received in its two transverse to the web running direction L edges in the guide 37 of the holder 34. It is acted upon by a pressing member 38 so that it is curved to the support band 16 inside and thereby assumes its operating position.
  • the relieved, their maintenance or change position engaging sealing blade 35 is at least substantially planar.
  • the distance of the sealing portion 36 of the sealing blade 35 to the support band 16 in the desired manner is adjustable.
  • the pressing element 38 is formed by a Anpressklinge, said Anpressklinge 38 has a greater rigidity than the sealing blade 35.
  • This pressing element 38 formed by a blade is accommodated in a recess 40 of the stabilizer box 20, which is at least partially covered by the pressing blade 35.
  • the pressing member 38 is again laterally, d. H. transversely to the web running direction L, pulled out of the holder 34.
  • a corresponding guide is again provided for this pressure element 38.

Landscapes

  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

An apparatus for treating a fibrous web whose sealing element can be replaced without difficulty, such that replacement is possible without dismantling any stabilizer box An apparatus for treating a fibrous web, comprises (a) supporting surface(s) arranged to support the web surface; and (b) sealing device(s) adjacent the web surface opposite the supported web surface. The sealing device(s) comprise a sealing element and a holder structured and arranged to hold and enable lateral sliding movement of (b) crosswise to a web travel direction.

Description

Die Erfindung betrifft eine Vorrichtung zur Behandlung einer Faserstoffbahn wie insbesondere einer Papier- und/oder Kartonbahn, in der die Faserstoffbahn zusammen mit wenigstens einem Stützband wie insbesondere einem Entwässerungsband, Pressband, Siebband und/oder dergleichen über wenigstens eine bewegte oder stationäre Stützfläche geführt ist und auf der von einer solchen Stützfläche abgewandten Seite der Faserstoffbahn wenigstens eine Dichtungseinrichtung vorgesehen ist, die ein in einer Halterung aufgenommenes Dichtelement umfasst, das in unmittelbarer Nähe zum Stützband angeordnet ist, ohne dieses zu berühren, wobei das Dichtelement seitlich, d.h. quer zur Bahnlaufrichtung aus der Halterung herausführbar ist.The invention relates to a device for treating a fibrous web such as in particular a paper and / or board web, in which the fibrous web is guided along at least one support belt, in particular a dewatering belt, press belt, wire and / or the like via at least one moving or stationary support surface and on the side facing away from such a support surface side of the fibrous web at least one sealing device is provided which comprises a received in a holder sealing element, which is arranged in close proximity to the support band, without touching it, wherein the sealing element laterally, ie can be led out of the holder transversely to the web running direction.

Solche Vorrichtungen mit anpressbaren Dichtkörpern sind beispielsweise in der DE-A-197 16 131.6 , der US-B-6 247 247 sowie der US-A-4 185 399 beschrieben.Such devices with contactable sealing bodies are for example in the DE-A-197 16 131.6 , of the US-B-6,247,247 as well as the US-A-4,185,399 described.

Die betreffende Dichtungseinrichtung ist häufig im Bereich einer lufttechnischen Einrichtung wie insbesondere eines Stabilisatorkastens oder dergleichen vorgesehen. Dabei kann im oberen Bereich eines solchen Stabilisatorkastens eine zusätzliche Vakuumzone vorgesehen sein. Zwischen den beiden Vakuumzonen, d. h. zwischen der oberen und der unteren Vakuumzone, kann eine insbesondere fest am Kasten montierte Dichtung vorgesehen sein.The sealing device in question is often provided in the area of a ventilation device, in particular a stabilizer box or the like. In this case, an additional vacuum zone can be provided in the upper region of such a stabilizer box. Between the two vacuum zones, d. H. between the upper and the lower vacuum zone, a particular fixedly mounted on the box seal can be provided.

Ziel der Erfindung ist es, eine Vorrichtung der eingangs genannten Art zu schaffen, bei der das Dichtelement problemlos ausgewechselt werden kann, d. h. ein Auswechseln gegebenenfalls auch ohne Ausbau des Stabilisatorkastens möglich ist. Gegebenenfalls soll ein solcher Wechsel auch hinter dem Stuhlungsteil möglich sein.The aim of the invention is to provide a device of the type mentioned, in which the sealing element can be easily replaced, d. H. replacement is also possible without removal of the stabilizer box. If necessary, such a change should also be possible behind the chair part.

Diese Aufgabe wird nach der Erfindung gelöst durch eine Vorrichtung zur Behandlung einer Faserstoffbahn wie insbesondere einer Papier und/oder Kartonbahn, in der die Faserstoffbahn zusammen mit wenigstens einem Stützband wie insbesondere einem Entwässerungsband, Pressband, Siebband und/oder dergleichen über wenigstens eine bewegte oder stationäre Stützfläche geführt ist und auf der von einer solchen Stützfläche abgewandten Seite der Faserstoffbahn wenigstens eine Dichtungseinrichtung vorgesehen ist, die ein in einer Halterung aufgenommenes Dichtelement umfasst, das in unmittelbarer Nähe zum Stützband angeordnet ist, ohne dieses zu berühren, d. h. unter Aufrechterhaltung eines Spaltes zwischen dem Dichtelement und dem Stützband, wobei das Dichtelement seitlich, d.h. quer zur Bahnlaufrichtung, aus der Halterung herausführbar ist.This object is achieved according to the invention by a device for treating a fibrous web such as in particular a paper and / or board web, in which the fibrous web together with at least one support belt, in particular a dewatering belt, press belt, wire and / or the like is guided over at least one moving or stationary support surface and on the side facing away from such a support surface side of the fibrous web at least one sealing device is provided which comprises a received in a holder sealing element, which is arranged in close proximity to the support band without touching it, that is, while maintaining a gap between the sealing element and the support band, wherein the sealing element laterally, ie transversely to the web running direction, can be led out of the holder.

Das ein Verschleißteil bildende Dichtelement kann somit problemlos seitlich aus der Halterung herausgezogen werden, ohne dass dazu benachbarte Einrichtungen der Papiermaschine wie insbesondere ein benachbarter Stabilisatorkastens oder dergleichen mit ausgebaut werden müssen. Eventuell muss vor einem Herausziehen des Dichtelements eine seitliche Dichtung, eine seitliche Abdeckung oder ein seitliches Luftmesser entfernt werden, was jedoch mit minimalem Aufwand möglich ist.The wear part forming a sealing element can thus be easily pulled laterally out of the holder, without having to adjacent facilities of the paper machine, in particular an adjacent stabilizer box or the like must be removed with. It may be necessary to remove a side seal, a side cover or a side air knife before pulling out the sealing element, but this is possible with minimal effort.

Die Halterung ist zweckmäßiger Weise mit einer entsprechenden Führung versehen, entlang der das Dichtelement seitlich aus der Halterung herausziehbar ist.The holder is expediently provided with a corresponding guide along which the sealing element can be pulled laterally out of the holder.

Wie bereits erwähnt, kann die Dichtungseinrichtung beispielsweise im Bereich einer insbesondere in einer Pressenpartie oder einer Trockenpartei eingesetzten lufttechnischen Einrichtung wie insbesondere einem Dampfblaskasten, einem Saugkasten, einem Stabilisator, Belüftungseinbauten und/ oder dergleichen vorgesehen sein.As already mentioned, the sealing device can be provided, for example, in the region of a ventilation device used in particular in a press section or a dry party, such as, in particular, a steam blower box, a suction box, a stabilizer, ventilation installations and / or the like.

Das Dichtelement wird durch eine flexible Dichtklinge gebildet.The sealing element is formed by a flexible sealing blade.

Gemäß einer bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung ist die randseitig in der Halterung aufgenommene Dichtklinge über ein Anpresselement so beaufschlagbar, dass sie aus der Wartungs und/oder Wechselposition heraus zum Stützband hin gewölbt wird und dadurch ihre Betriebsposition einnimmt, in der ein Dichtabschnitt in unmittelbarer Nähe des Stützbandes ist.According to a preferred embodiment of the device according to the invention, the sealing blade received on the edge in the holder is acted upon by a contact pressure element so that it is arched out of the maintenance and / or change position towards the support band and thereby assumes its operating position, in which a sealing portion in the immediate vicinity of Support band is.

Die randseitig in der Halterung aufgenommene unbelastete Dichtklinge ist vorteilhafter Weise zumindest im wesentlichen eben, womit sie ihre Wartungs- bzw. Wechselposition einnimmt.The unloaded sealing blade received at the edge in the holder is advantageously at least substantially planar, with which point it assumes its maintenance or replacement position.

Zweckmäßigerweise ist über das Anpresselement der Abstand des Dichtabschnitts des Dichtelements zum Stützband einstellbar.Conveniently, the distance of the sealing portion of the sealing element is adjustable to the support band on the contact pressure.

Das Anpresselement ist vorzugsweise durch eine Anpressklinge gebildet, die zweckmäßigerweise eine größere Steifigkeit als die Dichtklinge besitzt.The pressing element is preferably formed by a Anpressklinge, which advantageously has a greater rigidity than the sealing blade.

Das Anpresselement kann beispielsweise in einer Ausnehmung eines vorzugsweise durch eine lufttechnischen Einrichtung gebildeten Trägers untergebracht sein. Dabei kann die Ausnehmung durch die Anpressklinge zumindest teilweise abgedeckt sein.The pressing element can be accommodated, for example, in a recess of a support, which is preferably formed by an air-technical device. In this case, the recess may be at least partially covered by the Anpressklinge.

Vorteilhafterweise ist auch das Anpresselement seitlich, d. h. quer zur Bahnlaufrichtung aus der Halterung herausführbar. Auch dazu kann die Halterung wieder mit einer entsprechenden Führung versehen sein.Advantageously, the pressing element is also laterally, d. H. can be led out of the holder transversely to the direction of web travel. Also, the holder may be provided again with a corresponding guide.

Zum Wechseln können also nach einem Entlasten des Dichtelements sowohl das Dichtelement als auch das Anpresselement seitlich aus der mit entsprechenden Führungen versehenen Halterung und damit seitlich aus der Papiermaschine herausgezogen werden.Thus, after a release of the sealing element, both the sealing element and the pressing element can be pulled laterally out of the holder provided with corresponding guides and thus laterally out of the paper machine.

Die Halterung kann über wenigstens ein Stellglied verstellbar, z. B. verschwenkbar, sein. Dabei ist beispielsweise der Einsatz von hydraulischen, pneumatischen und/oder elektromechanischen Stellgliedern denkbar.The holder can be adjusted via at least one actuator, for. B. be pivoted. In this case, for example, the use of hydraulic, pneumatic and / or electromechanical actuators is conceivable.

Die Halterung kann beispielsweise auch aufklappbar sein, so dass das Dichtelement nach einem Aufklappen der Halterung aus dieser entfernbar ist.The holder may for example also be hinged, so that the sealing element is removable after opening the holder from this.

Gemäß einer weiteren vorteilhaften Ausführungsform trennt die Dichtungseinrichtung in einer lufttechnischen Einrichtung zwei Zonen, die mit unterschiedlichem Druck beaufschlagbar sind.According to a further advantageous embodiment, the sealing device separates in an air-technical device two zones which can be acted upon with different pressure.

In bestimmten Fällen ist es auch von Vorteil, wenn die Dichtungseinrichtung in Kombination mit einer in der Trockenpartie eingesetzten lufttechnischen Einrichtung, z. B. Stabilisatorkasten, als in Bahnlaufrichtung betrachtet zweite Abdichtung insbesondere über die Maschinenbreite vorgesehen ist, um insbesondere eine obere und eine untere Vakuumzone voneinander zu trennen.In certain cases, it is also advantageous if the sealing device in combination with a ventilation device used in the drying section, for. B. stabilizer box, as viewed in the web running direction second seal is provided in particular over the machine width, in particular to separate an upper and a lower vacuum zone from each other.

Dabei können die beiden Vakuumzonen beispielsweise mit getrennten Unterdruckquellen verbunden sein.The two vacuum zones can be connected, for example, with separate vacuum sources.

Es ist jedoch auch eine solche Ausführungsform denkbar, bei der die beiden Vakuumzonen mit einer gemeinsamen Unterdruckquelle verbunden und die Drücke in den Vakuumzonen insbesondere über Klappen oder dergleichen getrennt einstellbar sind. Die in Bahnlaufrichtung betrachtet erste, einlaufseitge Abdichtung kann beispielsweise durch eine flexible, schwimmende Dichtung, eine mechanische Dichtleiste oder ein Luftmesser gebildet sein.However, it is also conceivable such an embodiment in which the two vacuum zones connected to a common vacuum source and the pressures in the vacuum zones are separately adjustable, in particular via flaps or the like. The considered in the web running direction first, inlet-side seal can be formed for example by a flexible, floating seal, a mechanical sealing strip or an air knife.

Wie bereits erwähnt, kann die Dichtungseinrichtung insbesondere auch für andere Unterdruckkästen, z. B. in der Presspartie, vorgesehen sein.As already mentioned, the sealing device can in particular also for other vacuum boxes, z. B. in the press section, be provided.

Das Dichtelement ist im Betrieb zweckmäßigerweise durch eine Arretierung, z. B. Steckbolzen (usw.), gegen ein seitliches Verrutschen gesichert.The sealing element is expediently in operation by a lock, z. B. locking pin (etc.), secured against lateral slipping.

Die die Führung für das Dichtelement aufweisende Halterung kann starr oder nachgiebig bzw. federnd mit der lufttechnischen Einrichtung verbunden sein.The holder for the sealing element having the holder may be rigid or resilient or resiliently connected to the ventilation device.

In bestimmten Fällen ist es auch von Vorteil, wenn das Dichtelement mit einer Bombierung versehen ist, d. h. über die Maschinenbreite betrachtet einen unterschiedlichen Abstand zum Stützband, beispielsweise Sieb, aufweist. Dadurch kann beispielsweise eine Siebdurchbiegung zwischen Rand und Mitte ausgeglichen werden.In certain cases, it is also advantageous if the sealing element is provided with a crowning, that is viewed over the machine width at a different distance from the support belt, for example sieve has. Thereby For example, a sieve deflection between edge and center can be compensated.

Das Dichtelement kann insbesondere aus Kunststoff, z. B. GFK, Teflon, CFK oder dergleichen, oder aus einem anderen Kunststoff, oder aus Metall bestehen.The sealing element may in particular made of plastic, for. As fiberglass, Teflon, CFRP or the like, or of another plastic, or made of metal.

Die beiden Vakuumzonen können seitlich beispielsweise über Luftmesser und/oder mechanische Abdeckplatten abgedichtet sein, die zur Freigabe des Dichtelements abnehmbar oder verstellbar, insbesondere verschiebbar, sind.The two vacuum zones may be laterally sealed, for example, via air knives and / or mechanical cover plates, which are removable or adjustable, in particular displaceable, for releasing the sealing element.

Das Dichtelement kann sich über die gesamte Maschinenbreite oder auch nur über einen Teil der Maschinenbreite erstrecken oder in der Breite in wenigstens zwei Zonen unterteilt sein.The sealing element may extend over the entire machine width or even over only a part of the machine width or be divided in width into at least two zones.

Die Erfindung wird im folgenden anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung näher erläutert. In dieser zeigen:

Fig. 1
eine rein schematische Teilansicht einer Trockenpartie einer Vorrichtung zur Behandlung einer Faserstoffbahn mit einer einem Trockenzylinder zugeordneten Dichtungseinrichtung, deren Dichtelement durch eine flexible Dichtklinge gebildet ist,
Fig. 2
eine vergrößerte Darstellung der in der Fig. 1 gezeigten Dichtungsvorrichtung, wobei das Dichtelement seine Betriebsposition einnimmt,
Fig. 3
eine vergrößerte Darstellung der in der Fig. 1 gezeigten Dichtungseinrichtung, wobei das Dichtelement seine Wartungsbzw. Wechselposition einnimmt.
The invention is explained below with reference to an embodiment with reference to the drawings. In this show:
Fig. 1
a purely schematic partial view of a drying section of a device for treating a fibrous web with a drying cylinder associated sealing device whose sealing element is formed by a flexible sealing blade,
Fig. 2
an enlarged view of the sealing device shown in Figure 1, wherein the sealing element assumes its operating position,
Fig. 3
an enlarged view of the sealing device shown in FIG. 1, wherein the sealing element its Wartungsbzw. Changing position.

Fig. 1 zeigt in schematischer Teilansicht eine Trockenpartie einer Vorrichtung zur Behandlung einer Faserstoffbahn mit zwei im Bereich eines Trockenzylinders vorgesehenen Dichtungen im oberen Bereich eines Stabilisatorkastens zur Bildung einer oberen und einer unteren Vakuumzone.1 shows a schematic partial view of a drying section of a device for treating a fibrous web with two seals provided in the region of a drying cylinder in the upper region of a stabilizer box to form an upper and a lower vacuum zone.

Die betreffende Vorrichtung dient der Behandlung einer Faserstoffbahn 10 wie insbesondere einer Papier- und/oder Kartonbahn.The device in question is used to treat a fibrous web 10 such as in particular a paper and / or board web.

In der Fig. 1 sind zwei aufeinanderfolgende Trockenzylinder 12, 14 angedeutet, die sich in Richtung der Pfeile F drehen und über die zusammen mit der Faserstoffbahn 10 ein Stützband 16 geführt ist, das im vorliegenden Fall durch ein Trockensieb gebildet ist.In Fig. 1, two successive drying cylinders 12, 14 are indicated, which rotate in the direction of arrows F and over which, together with the fibrous web 10, a support belt 16 is guided, which is formed in the present case by a drying wire.

Das zusammen mit der Faserstoffbahn 10 zunächst über den linken Trockenzylinder 12 geführte Stützband 14 läuft mit der Faserstoffbahn 10 in einem Ablaufbereich A von der durch die Außenumfangsfläche des Trockenzylinders 12 gebildeten Stützfläche 18 ab, um anschließend in Bahnlaufrichtung L beispielsweise einer durch einen lediglich angedeuteten äußeren Stabilisatorkasten 20 besaugten perforierten und/ oder gerillten Umlenkwalze 22 zugeführt zu werden. Bei dem Stabilisatorkasten 20 kann es sich im vorliegenden Fall insbesondere um einen Saugkasten oder dergleichen handeln. Grundsätzlich kann die im folgenden näher beschriebene Dichtungsanordnung jedoch auch im Bereich anderer lufttechnischer Einrichtungen vorgesehen sein.The guided along with the fibrous web 10 first on the left drying cylinder 12 support belt 14 runs with the fibrous web 10 in a discharge area A from the outer peripheral surface of the drying cylinder 12 formed support surface 18 to then in the web running direction L, for example, by a merely indicated outer stabilizer box 20 sucked perforated and / or grooved guide roller 22 to be supplied. In the present case, the stabilizer box 20 may in particular be a suction box or the like. In principle, however, the sealing arrangement described in more detail below can also be provided in the area of other ventilation devices.

Auf der von der Stützfläche 18 abgewandten Seite der Faserstoffbahn 10 sowie des Stützbandes 16 ist in Bahnlaufrichtung L vor dem Ablaufbereich A eine erste Dichtung 24 vorgesehen. Bei dieser ersten, einlaufseitigen Abdichtung kann es sich beispielsweise um eine flexible, schwimmende Dichtung, eine mechanische Dichtleiste oder ein Luftmesser handeln.On the side facing away from the support surface 18 side of the fibrous web 10 and the support belt 16, a first seal 24 is provided in the web running direction L before the discharge area A. This first, inlet-side seal can be, for example, a flexible, floating seal, a mechanical sealing strip or an air knife.

Im Anschluss an diese erste Dichtung 24 ist eine nach dem Ablaufbereich A angeordnete zweite Dichtung oder Dichtungseinrichtung 26 vorgesehen, so dass sich eine obere und eine untere Vakuumzone 28 bzw. 30 ergibt. Die Absaugung der oberen Vakuumzone erfolgt über wenigstens einen Absaugkanal 32 (vgl. insbesondere die Fig. 2 und 3). Die untere Vakuumzone 30 dient unter anderem der Stabilisierung der Bahnführung. Die obere Vakuumzone 28 dient insbesondere als sogenannte "ProRelease"- oder Ablösezone. Die Anordnung dient insgesamt also einem kontrollierten Ablösen und Stabilisieren der Faserstoffbahn 10.Subsequent to this first seal 24, a second seal or sealing device 26 arranged downstream of the drain region A is provided so that an upper and a lower vacuum zone 28 or 30 result. The suction of the upper vacuum zone via at least one suction channel 32 (see, in particular Figs. 2 and 3). Among other things, the lower vacuum zone 30 serves to stabilize the web guide. The upper vacuum zone 28 serves in particular as so-called "ProRelease" - or detachment zone. The arrangement thus serves a total of a controlled detachment and stabilization of the fibrous web 10th

Die Dichtungseinrichtung 26 umfasst ein in einer Halterung 34 (vgl. insbesondere auch die Fig. 2 und 3) aufgenommenes Dichtelement, das im folgenden Fall als flexible Dichtklinge 35 ausgeführt ist.The sealing device 26 comprises a sealing element received in a holder 34 (cf., in particular, also FIGS. 2 and 3), which in the following case is designed as a flexible sealing blade 35.

Wie am besten anhand der Fig. 2 und 3 zu erkennen ist, ist die Dichtklinge 35 zwischen einer Betriebsposition /vgl. Fig. 2) in der ein Dichtabschnitt 36 des Dichtelements 34 in unmittelbarer Nähe des Stützbandes angeordnet ist, und einer Wartungs- und/ oder Wechselposition (vgl. Fig. 3) verstellbar, in der der Dichtabschnitt 36 einen größeren Abstand zum Stützband 16 aufweist. Dabei ist die Dichtklinge 35 insbesondere dann, wenn sie ihre Wartungs- bzw. Wechselposition einnimmt, seitlich, d. h quer zur Bahnlaufrichtung L, aus der Halterung 34 herausführbar. Diese ein Verschleißteil bildende Dichtklinge 35 kann somit problemlos seitlich aus der Halterung 34 herausgezogen werden, ohne dass dazu der Stabilisierungskasten 20 ausgebaut werden muss. Vor einem Herausziehen der Dichtklinge 35 muss allenfalls eine seitliche Dichtung, eine seitliche Abdeckung, ein seitliches Luftmesser oder dergleichen entfernt werden, was jedoch mit minimalem Aufwand möglich ist.As best seen with reference to FIGS. 2 and 3, the sealing blade 35 between an operating position / cf. 2) in which a sealing portion 36 of the sealing element 34 is arranged in the immediate vicinity of the support band, and a maintenance and / or change position (see FIG. 3) adjustable, in which the sealing portion 36 has a greater distance from the support band 16. In this case, the sealing blade 35, in particular when it assumes its maintenance or change position, laterally, d. H transversely to the web running direction L, led out of the holder 34. This forming a wear part sealing blade 35 can thus be easily pulled laterally out of the holder 34, without requiring the stabilization box 20 must be removed. Before pulling out the sealing blade 35 at most a lateral seal, a side cover, a side air knife or the like must be removed, but this is possible with minimal effort.

Die Halterung 34, die im vorliegenden Fall am Stabilisatorkasten 20 vorgesehen ist, ist mit einer entsprechenden Führung 37 versehen, entlang der die Dichtklinge 35 seitlich aus der Halterung 34 herausziehbar ist.The holder 34, which is provided in the present case on the stabilizer box 20, is provided with a corresponding guide 37, along which the sealing blade 35 can be pulled laterally out of the holder 34.

Wie insbesondere anhand der Fig. 2 und 3 zu erkennen ist, ist die Dichtklinge 35 an seinen beiden quer zur Bahnlaufrichtung L verlaufenden Rändern in der Führung 37 der Halterung 34 aufgenommen. Dabei ist sie über ein Anpresselement 38 so beaufschlagbar, dass es zum Stützband 16 innen gewölbt wird und dadurch seine Betriebsposition einnimmt.As can be seen in particular with reference to FIGS. 2 and 3, the sealing blade 35 is received in its two transverse to the web running direction L edges in the guide 37 of the holder 34. It is acted upon by a pressing member 38 so that it is curved to the support band 16 inside and thereby assumes its operating position.

Wie anhand der Fig. 3 zu erkennen ist, ist die entlastete, ihre Wartungs- bzw. Wechselposition einnehmende Dichtklinge 35 zumindest im wesentlichen eben.As can be seen with reference to FIG. 3, the relieved, their maintenance or change position engaging sealing blade 35 is at least substantially planar.

Über das Anpresselement 38 ist der Abstand des Dichtabschnitts 36 der Dichtklinge 35 zum Stützband 16 in der gewünschten Weise einstellbar.About the pressing member 38, the distance of the sealing portion 36 of the sealing blade 35 to the support band 16 in the desired manner is adjustable.

Im vorliegenden Fall ist das Anpresselement 38 durch eine Anpressklinge gebildet, wobei diese Anpressklinge 38 eine größere Steifigkeit als die Dichtklinge 35 besitzt. Dieses durch eine Klinge gebildete Anpresselement 38 ist in einer Ausnehmung 40 des Stabilisatorkastens 20 untergebracht, die durch die Anpressklinge 35 zumindest teilweise abgedeckt ist.In the present case, the pressing element 38 is formed by a Anpressklinge, said Anpressklinge 38 has a greater rigidity than the sealing blade 35. This pressing element 38 formed by a blade is accommodated in a recess 40 of the stabilizer box 20, which is at least partially covered by the pressing blade 35.

Auch das Anpresselement 38 ist wieder seitlich, d. h. quer zur Bahnlaufrichtung L, aus der Halterung 34 herausziehbar. Dabei ist auch für dieses Anpresselement 38 wieder eine entsprechende Führung vorgesehen. Nach einem Entlasten der Dichtklinge 35 können diese Dichtklinge 35 sowie das Anpresselement 38 also einzeln seitlich aus der Maschine herausgezogen werden.Also, the pressing member 38 is again laterally, d. H. transversely to the web running direction L, pulled out of the holder 34. In this case, a corresponding guide is again provided for this pressure element 38. After relieving the sealing blade 35, these sealing blade 35 and the contact pressure element 38 can therefore be pulled out of the machine individually laterally.

Claims (24)

  1. Apparatus for treating a fibrous web (10) such as in particular a paper and/or board web, in which the fibrous web (10), together with at least one supporting belt (16) such as in particular a dewatering belt, press belt, mesh belt and/or the like is guided over at least one moving or stationary supporting surface (18) and, on the side of the fibrous web (10) facing away from such a supporting surface (18), at least one sealing device (26) is provided, which comprises a sealing element (35) which is held in a holder (34) which is arranged in the immediate vicinity of the supporting belt (16) without touching the latter, it being possible for the sealing element (35) to be guided out of the holder (34) laterally, that is to say transversely with respect to the web running direction (L) characterized in that the sealing element (35) is formed by a flexible sealing blade and the sealing blade, held at the edges in the holder (34), can be acted on by a pressing element (38) in such a way that it becomes curved out of the maintenance and/or changing position towards the supporting belt (16) and, as a result, assumes its operating position, in which a sealing section (36) of the sealing element (35) is in the immediate vicinity of the supporting belt (16).
  2. Apparatus according to Claim 1, characterized in that the holder (34) is provided with a corresponding guide (37), along which the sealing element (35, 35') can be drawn laterally out of the holder (34).
  3. Apparatus according to Claim 1 or 2, characterized in that the sealing device (26) is provided in the area of an air-based device (20) used in particular in a press section or a drying section, such as in particular a steam blower box, a suction box, a stabilizer, ventilation fittings and/or the like.
  4. Apparatus according to one of the preceding claims, characterized in that the unloaded sealing blade held at the edges in the holder (34) is at least substantially flat and therefore assumes its maintenance or changing position.
  5. Apparatus according to one of the preceding claims, characterized in that the distance of the sealing section (36) of the sealing element (35) from the supporting belt (16) can be set via the pressing element (38).
  6. Apparatus according to one of the preceding claims, characterized in that the pressing element (38) is formed by a pressing blade.
  7. Apparatus according to Claim 6, characterized in that the pressing blade (38) has a greater stiffness than the sealing blade (35).
  8. Apparatus according to one of the preceding claims, characterized in that the pressing element (38) is accommodated in a recess (40) in a carrier preferably formed by an air-based device (20).
  9. Apparatus according to Claim 8, characterized in that the recess (40) is at least partially covered by the pressing blade (38).
  10. Apparatus according to one of the preceding claims, characterized in that the pressing element (38) can also be guided out of the holder (34) laterally, that is to say transversely with respect to the web running direction (L).
  11. Apparatus according to one of the preceding claims, characterized in that the holder (34) is adjustable via at least one actuating element (48).
  12. Apparatus according to one of the preceding claims, characterized in that the holder (34) can be folded back or pivoted.
  13. Apparatus according to one of the preceding claims, characterized in that in an air-based device, the sealing device (26) separates two zones which can be acted on with different vacuums.
  14. Apparatus according to one of the preceding claims, characterized in that the sealing device (26) is provided in combination with an air-based device (20) used in the drying section, for example a stabilizer box, as a second sealing means, as viewed in the web running direction (L), in particular over the machine width, in order in particular to separate an upper and a lower vacuum zone (28 and 30) from each other.
  15. Apparatus according to Claim 14, characterized in that the two vacuum zones (28, 30) are connected to separate vacuum sources.
  16. Apparatus according to Claim 14, characterized in that the two vacuum zones (28, 30) are connected to a common vacuum source, and the pressures in the vacuum zones can be set separately, in particular via flaps or the like.
  17. Apparatus according to one of Claims 14 to 16, characterized in that the first sealing means (24) on the inlet side, as viewed in the web running direction (L), is formed by a flexible, floating seal, a mechanical sealing strip or an air knife.
  18. Apparatus according to one of the preceding claims, characterized in that during operation the sealing element (35) is secured against slipping out laterally by a locking means, for example cotter pin, clamp and so on.
  19. Apparatus according to one of Claims 2 to 18, characterized in that the holder (34) having the guide (37) for the sealing element (35) is connected rigidly or in a compliant or sprung manner to the air-based device (20).
  20. Apparatus according to one of the preceding claims, characterized in that the sealing element (35) is provided with a camber.
  21. Apparatus according to one of the preceding claims, characterized in that the sealing element (35) consists of plastic, for example GRP, Teflon, CRP or the like, or of metal.
  22. Apparatus according to one of the Claims 15 to 21, characterized in that the two vacuum zones (28, 30) can be sealed off laterally via air knives and/or mechanical sealing plates which, in order to release the sealing element, are removable or adjustable, in particular displaceable.
  23. Apparatus according to one of the preceding claim, characterized in that the sealing element (35) extends over the entire machine width.
  24. Apparatus according to one of Claims 1 to 22, characterized in that the sealing element (35) extends over only part of the machine width or is subdivided over its width into at least two zones.
EP02011797A 2001-08-20 2002-05-28 Device for treating a fibrous web Expired - Fee Related EP1285992B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10140801 2001-08-20
DE10140801A DE10140801A1 (en) 2001-08-20 2001-08-20 Device for treating a fibrous web

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EP1285992A1 EP1285992A1 (en) 2003-02-26
EP1285992B1 true EP1285992B1 (en) 2007-09-26

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US (1) US6740204B2 (en)
EP (1) EP1285992B1 (en)
JP (1) JP4248813B2 (en)
AT (1) ATE374283T1 (en)
CA (2) CA2398558A1 (en)
DE (2) DE10140801A1 (en)

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DE10322519A1 (en) * 2003-05-19 2004-12-09 Voith Paper Patent Gmbh Web guiding means
DE10337080A1 (en) * 2003-08-12 2005-03-10 Voith Paper Patent Gmbh Device for treating a fibrous web
CN100558765C (en) * 2005-02-05 2009-11-11 锦化化工（集团）有限责任公司 Adopt 70.5m 3Polymeric kettle is produced the method for polyvinyl chloride
FI20050596A0 (en) * 2005-06-06 2005-06-06 Metso Paper Inc Apparatus and method for sealing a pocket space existing between dryer cylinders in a paper machine or equivalent
US20070098984A1 (en) * 2005-11-01 2007-05-03 Peterson James F Ii Fiber with release-material sheath for papermaking belts
DE102005055215A1 (en) * 2005-11-19 2007-05-24 Voith Patent Gmbh Device for treating a material web
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CN114541165B (en) * 2022-01-28 2024-01-05 江苏理文造纸有限公司 Distance-adjustable paper stabilizing system and adjusting method

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US6740204B2 (en) 2004-05-25
ATE374283T1 (en) 2007-10-15
EP1285992A1 (en) 2003-02-26
US20030034138A1 (en) 2003-02-20
DE10140801A1 (en) 2003-03-06
DE50210960D1 (en) 2007-11-08
CA2398917A1 (en) 2003-02-20
JP2003064591A (en) 2003-03-05
JP4248813B2 (en) 2009-04-02
CA2398558A1 (en) 2003-02-20

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