EP0503249B1 - Dewatering apparatus for the wet section of a papermachine - Google Patents

Dewatering apparatus for the wet section of a papermachine Download PDF

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Publication number
EP0503249B1
EP0503249B1 EP92101206A EP92101206A EP0503249B1 EP 0503249 B1 EP0503249 B1 EP 0503249B1 EP 92101206 A EP92101206 A EP 92101206A EP 92101206 A EP92101206 A EP 92101206A EP 0503249 B1 EP0503249 B1 EP 0503249B1
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EP
European Patent Office
Prior art keywords
force
wire
dewatering apparatus
running direction
bar
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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
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EP92101206A
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German (de)
French (fr)
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EP0503249A1 (en
Inventor
Alfred Dr. Bubik
Otto Hildebrand
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Voith Sulzer Papiermaschinen GmbH
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Voith Sulzer Papiermaschinen GmbH
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Publication of EP0503249A1 publication Critical patent/EP0503249A1/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/48—Suction apparatus
    • D21F1/483—Drainage foils and bars
    • D21F1/486—Drainage foils and bars adjustable

Definitions

  • the invention relates to a dewatering device for the wet end of a paper machine with strips lying transversely to the direction of wire travel, which are fastened to supports arranged transversely to the direction of travel and are adjustable individually or in groups in the direction of the paper machine screen, with the bars being adjustable by the participation of Force elements a desired force or pressure effect can be exerted on the paper machine screen, in particular for dewatering and formation of the fibrous layer on the screen.
  • the invention has for its object to provide a drainage device in which both the largely individual adjustment of the forming strips is possible, as well as a sensitive, jamming-free adjustment via the necessary adjustment paths.
  • the carriers are mechanically connected to one another with couplings and can be displaced on guides in the direction of the paper machine sieve, the carriers and couplings being designed in such a way that they leave sufficient free space for the water coming from the sieve to pass through that the group of the jointly adjustable strips consists of two, three or four strips, so that by combining a relatively small number of individual strips, there remains sufficient possibility for individual adjustment of the strips against the sieve, and also with the strips through the participation of the adjustable, Seen in the running direction of the screen, successive force elements, the desired force or pressure effect can be exerted on the paper machine screen and the force elements are designed and positioned so that they can also generate moments that are able to withstand the tilting moments caused by the frictional force between the ledge and sieve to counteract.
  • the measures mentioned in claim 1 very advantageously achieve that the inevitable tilting moments can be derived into the force elements, which not only generate the required contact pressure of the strips, but also absorb the moment in the inventive design of the drainage device. This prevents the guides from jamming, which allow movement in the direction of the screen and back.
  • the force elements can be designed so that there is still enough space between them in order to be able to drain the water from this area quickly and with little hindrance.
  • the force elements 2 are in turn supported on the paper machine frame 20.
  • the force sources 8 located in the force elements are filled with a pressure medium which generates the required force.
  • the individual strips 1 fastened on supports 5 are mechanically connected to one another with the aid of couplings 5 ′ which are rigidly embodied here.
  • Fig. 2 + 3 show similar drainage devices, but only two strips 1 are combined in a group and the force elements 8, 8 'are shown here by way of example as hoses that can be filled with pressure medium (Fig. 2 or bellows Fig. 3).
  • the water 4 ′ which is discharged during operation of the device below the sieve 3 is made visible, which has been omitted in the other drawings for the sake of simplicity.
  • the coupling 5 'between the supports 5 can also, as shown in FIG. 4, be provided with a joint 5 ".
  • the carrier 5 enables, since the frictional force moments generate opposing forces in the joint.
  • FIG. 5 allows the independent adjustment of adjacent strips 1, since a force that is essentially independent of the path can be generated by a force-generating component 26.
  • This causes lever 25 and 25 ', which are rigidly connected to adjacent supports 5, the desired supporting moment and at the same time allows a change in position of a bar 1 with respect to the sieve.
  • Such a measure can be advantageous, for example, in the case of greatly exaggerated groin wear, but also to be able to regulate the pressing force more precisely.
  • FIG. 6 A further possibility is shown in FIG. 6, in which four strips 1 are mounted on a frame 19 which is supported on power sources 8 '.
  • the guides are not visible, with which the frame 19, the effect of which corresponds to that of the carrier and couplings, can be displaced in the direction of the paper machine wire 3.
  • FIGS. 7 to 10 possible variants of the invention are shown in each case on only one bar with an associated force element.
  • a power source is used, the power application of which is offset behind the power application on the bar 1, while in the embodiment of FIG. 8 a power source 9 is provided to solve the task, the rear wall structure 14 of which is designed so that it is in the Operation generates a stronger force towards the screen than the areas of this power source located further forward.
  • the strips 1 can be adjusted by moving the sliding parts 12 in the direction of the sieve. These sliding parts are guided in cross members 21 which extend essentially across the width of the paper machine.
  • a deformable hose filled with pressure medium serves as the power source in FIG. 9 and a pressure chamber in FIG. 10.
  • the guide surfaces between the cross member 21 and the sliding part 12 are lubricated by a medium reducing the frictional force.
  • water is used for this purpose, which emerges in a targeted amount from the guide gap between cross member 21 and sliding part 12 and can be used for cleaning or rinsing the strip 1.

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Abstract

A dewatering device for the web-forming or wet section of a papermaking machine comprises foils arranged transverse to a forming wire, that is to say, extend in the cross-machine direction. Force or powering elements act upon the foils so as to exert a force or pressure upon the forming wire, and thus, bring about dewatering and sheet formation of a layer of fiber stock suspension reposing upon the forming wire. The force elements are constructed and positioned such that additional moments are generated which counteract tilting moments produced by the frictional force present between the foils and the forming wire. In certain arrangements, the force elements also can be interconnected with one another.

Description

Die Erfindung bezieht sich auf eine Entwässerungseinrichtung für die Naßpartie einer Papiermaschine mit quer zur Sieblaufrichtung liegenden Leisten, welche auf quer zur Laufrichtung angeordneten Trägem befestigt und einzeln oder in Gruppen in Richtung zu dem Papiermaschinen-Sieb verstellbar sind, wobei mit den Leisten durch Mitwirkung von einstellbaren Kraftelementen eine gewünschte Kraft- bzw. Druckwirkung auf das Papiermaschinensieb ausgeübt werden kann, insbesondere zur Entwässerung und Formation der auf dem Sieb befindlichen Faserstoffschicht.The invention relates to a dewatering device for the wet end of a paper machine with strips lying transversely to the direction of wire travel, which are fastened to supports arranged transversely to the direction of travel and are adjustable individually or in groups in the direction of the paper machine screen, with the bars being adjustable by the participation of Force elements a desired force or pressure effect can be exerted on the paper machine screen, in particular for dewatering and formation of the fibrous layer on the screen.

Die in der EP-A-0 421 219 offengelegte Anmeldung, die unter Artikel 54 (3) EPÜ fällt, zeigt Formationsleisten, aus denen Entwässerungseinrichtungen der angegebenen Art gebildet werden können, die dem nächstliegenden Stand der Technik entsprechen. Diese Publikation weist eine Möglichkeit auf, Leisten individuell verstellbar zu machen, um ihre Position bzw. Kraftwirkung auf das Papiermaschinensieb anforderungsgemäß einstellen zu können. Je nach Betriebsbedingungen, unter denen diese Leisten verwendet werden, insbesondere wenn größere Verstellwege erforderlich sind, kann es jedoch dazu kommen, daß sich diese Leisten verklemmen und verbiegen. Eine der Hauptursachen dafür liegt darin, daß an der Stelle, wo die Leisten das Sieb berühren, Reibungskräfte auftreten, welche infolge der Hebelwirkung ein von den Führungen der Leistenverstellung aufzunehmenden Moment erzeugen und dadurch zum Klemmen führen. Da in diesem Bereich der Papiermaschine mit hoher Präzision eingestellt bzw. geregelt werden muß, entstehen durch ein nicht präzises Arbeiten des Verstellmechanismus ausgeprägte Nachteile bei der Erzeugung eines qualitativ hochwertigen Papierblattes.The application disclosed in EP-A-0 421 219, which falls under Article 54 (3) EPC, shows formation strips from which drainage devices of the specified type can be formed which correspond to the closest prior art. This publication has the possibility of making strips individually adjustable in order to be able to adjust their position or force effect on the paper machine screen as required. Depending on the operating conditions under which these strips are used, especially if longer adjustment paths are required, these strips may become jammed and bent. One of the main reasons for this is that at the point where the strips touch the screen, frictional forces occur which, due to the leverage effect, generate a moment to be absorbed by the guides of the strip adjustment and thereby lead to jamming. Since in this area the paper machine has to be adjusted or regulated with high precision, pronounced disadvantages arise in the production of a high-quality paper sheet as a result of the adjustment mechanism not working precisely.

Es sind auch andere Entwässerungseinrichtungen bekannt (siehe z.B. EP-A-0 251 779), bei denen eine Vielzahl von Leisten auf einem Rahmen montiert werden und der Rahmen durch entsprechende Kraftelemente gegen das Papiermaschinensieb gedrückt werden kann. Solche Konstruktionen lassen sich zwar leichter klemmfrei bauen, dafür ist aber eine individuelle Verstellung der einzelnen Formierleisten nicht möglich.Other drainage devices are also known (see, for example, EP-A-0 251 779), in which a multiplicity of strips are mounted on a frame and the frame can be pressed against the paper machine screen by corresponding force elements. Such constructions are easier to build without jamming, but individual adjustment of the individual molding strips is not possible.

Der Erfindung liegt die Aufgabe zugrunde, eine Entwässerungseinrichtung zu schaffen, bei der sowohl die weitestgehend individuelle Verstellung der Formierleisten möglich ist, als auch ein feinfühliges, klemmfreies Verstellen über die erforderlichen Verstellwege.The invention has for its object to provide a drainage device in which both the largely individual adjustment of the forming strips is possible, as well as a sensitive, jamming-free adjustment via the necessary adjustment paths.

Diese Aufgabe wird dadurch gelöst, daß die Träger mit Kopplungen mechanisch miteinander verbunden und an Führungen in Richtung zu dem Papiermaschinen-Sieb verschiebbar sind, wobei die Träger und Kopplungen derart ausgestaltet sind, daß sie ausreichend freien Platz zum Durchtritt des vom Sieb her kommenden Wassers lassen, daß die Gruppe der gemeinsam verstellbaren Leisten aus zwei, drei oder vier Leisten besteht, so daß durch Zusammenfassung von einer relativ geringen Anzahl von Einzelleisten genügend Möglichkeit zur individuellen Verstellung der Leisten gegen das Sieb verbleibt, wobei außerdem mit den Leisten durch Mitwirkung der einstellbaren, in Laufrichtung des Siebes gesehen, hintereinanderliegenden Kraftelementen die gewünschte Kraft- bzw. Druckwirkung auf das Papiermaschinensieb ausgeübt werden kann und die Kraftelemente so gestaltet und positioniert sind, daß sie zusätzlich Momente erzeugen können, die in der Lage sind, den Kippmomenten, welche von den Reibkräften zwischen Leisten und Sieb herrühren, entgegenzuwirken.This object is achieved in that the carriers are mechanically connected to one another with couplings and can be displaced on guides in the direction of the paper machine sieve, the carriers and couplings being designed in such a way that they leave sufficient free space for the water coming from the sieve to pass through that the group of the jointly adjustable strips consists of two, three or four strips, so that by combining a relatively small number of individual strips, there remains sufficient possibility for individual adjustment of the strips against the sieve, and also with the strips through the participation of the adjustable, Seen in the running direction of the screen, successive force elements, the desired force or pressure effect can be exerted on the paper machine screen and the force elements are designed and positioned so that they can also generate moments that are able to withstand the tilting moments caused by the frictional force between the ledge and sieve to counteract.

Die folgenden Unteransprüche zeigen besonders vorteilhafte Ausführungsformen der Erfindung.The following subclaims show particularly advantageous embodiments of the invention.

Durch die im Anspruch 1 genannten Maßnahmen wird sehr vorteilhaft erreicht, daß die unvermeidlichen Kippmomente in die Kraftelemente abgeleitet werden können, wobei diese nicht nur den erforderlichen Anpreßdruck der Leisten erzeugen, sondern bei erfinderischer Ausgestaltung der Entwässerungseinrichtung das Moment auffangen. Dabei wird das Klemmen der Führungen, die die Bewegung in Richtung zum Sieb und zurück erlauben, verhindert. Die Kraftelemente lassen sich so gestalten, daß zwischen ihnen noch ausreichend Platz verbleibt, um das anfallende Wasser aus diesem Bereich schnell und nur wenig behindert abführen zu können.The measures mentioned in claim 1 very advantageously achieve that the inevitable tilting moments can be derived into the force elements, which not only generate the required contact pressure of the strips, but also absorb the moment in the inventive design of the drainage device. This prevents the guides from jamming, which allow movement in the direction of the screen and back. The force elements can be designed so that there is still enough space between them in order to be able to drain the water from this area quickly and with little hindrance.

Die Erfindung und ihre verschiedenen Ausführungsformen werden anhand von Zeichnungen erläutert. Dabei zeigen

Fig 1
eine perspektivische Ansicht des Erfindungsgegenstandes;
Fig 2 bis 6
diverse Ausführungsvarianten in schematischen Darstellungen, im Schnitt.
Fig 7 bis 10
weitere Ausführungsvarianten in schematischen Darstellungen, im Schnitt, jeweils an Einzelleisten gezeigt.
The invention and its various embodiments are explained with reference to drawings. Show
Fig. 1
a perspective view of the subject of the invention;
Fig. 2 to 6
Various versions in schematic representations, on average.
Fig. 7 to 10
further variants in schematic representations, shown in section, each on individual strips.

Fig. 1 zeigt eine Gruppe von drei Leisten 1, welche unterhalb eines Siebes 3 mit einer Faserschicht 4 angeordnet sind und durch drei Kraftelemente 2 gegen das Sieb gedrückt werden. Die Kraftelemente 2 stützen sich wiederum auf den Papiermaschinenrahmen 20 ab. Die in den Kraftelementen sitzenden Kraftquellen 8 sind in diesem Falle mit einem Druckmedium gefüllt, welches die erforderliche Kraft erzeugt. Die einzelnen auf Trägern 5 befestigten Leisten 1 sind mit Hilfe von hier starr ausgeführten Kopplungen 5' mechanisch miteinander verbunden.1 shows a group of three strips 1, which are arranged below a sieve 3 with a fiber layer 4 and are pressed against the sieve by three force elements 2. The force elements 2 are in turn supported on the paper machine frame 20. In this case, the force sources 8 located in the force elements are filled with a pressure medium which generates the required force. The individual strips 1 fastened on supports 5 are mechanically connected to one another with the aid of couplings 5 ′ which are rigidly embodied here.

Fig. 2 + 3 zeigen ähnliche Entwässerungsvorrichtungen, wobei allerdings jeweils nur zwei Leisten 1 in einer Gruppe zusammengefaßt sind und die Kraftelemente 8, 8' hier beispielhaft als mit Druckmittel befüllbare Schläuche (Fig. 2 bzw. Faltenbälge Fig. 3) dargestellt sind. Im Falle der Fig.2 ist das im Betrieb der Vorrichtung unterhalb des Siebes 3 abgeführte Wasser 4' sichtbar gemacht, das in den anderen Zeichnungen aus Vereinfachung weggelassen wurde.Fig. 2 + 3 show similar drainage devices, but only two strips 1 are combined in a group and the force elements 8, 8 'are shown here by way of example as hoses that can be filled with pressure medium (Fig. 2 or bellows Fig. 3). In the case of FIG. 2, the water 4 ′ which is discharged during operation of the device below the sieve 3 is made visible, which has been omitted in the other drawings for the sake of simplicity.

Die Kopplung 5' zwischen den Trägern 5 kann auch, wie in Fig. 4 dargestellt, mit einem Gelenk 5" versehen sein. Trotz der im Betrieb an den Leisten auftretenden Reibkraftmomente, hier durch die Pfeile B angedeutet, wird so eine stabile, klemmfreie Führung der Träger 5 ermöglicht, da die Reibkraftmomente in dem Gelenk entgegengesetzte Kräfte erzeugen.The coupling 5 'between the supports 5 can also, as shown in FIG. 4, be provided with a joint 5 ". Despite the frictional force moments occurring on the strips during operation, indicated here by the arrows B, stable, jamming-free guidance is thus achieved the carrier 5 enables, since the frictional force moments generate opposing forces in the joint.

Die in Fig. 5 dargestellte Ausführung läßt die unabhängige Verstellung von benachbarten Leisten 1 zu, da durch ein krafterzeugendes Bauteil 26 eine im wesentlichen wegunabhängige Kraft erzeugt werden kann. Diese bewirkt über Hebel 25 und 25', welche mit benachbarten Trägem 5 starr verbunden sind, das gewünschte abstützende Moment und läßt gleichzeitig ein Lageänderung einer Leiste 1 bezüglich des Siebes zu. Eine solche Maßnhme kann etwa bei hier stark übertrieben gezeichnetem Leistenverschleiß von Vorteil sein, aber auch um die Andruckkraft feiner regulieren zu können.The embodiment shown in FIG. 5 allows the independent adjustment of adjacent strips 1, since a force that is essentially independent of the path can be generated by a force-generating component 26. This causes lever 25 and 25 ', which are rigidly connected to adjacent supports 5, the desired supporting moment and at the same time allows a change in position of a bar 1 with respect to the sieve. Such a measure can be advantageous, for example, in the case of greatly exaggerated groin wear, but also to be able to regulate the pressing force more precisely.

Eine weitere Möglichkeit ist in Fig. 6 dargestellt, bei der vier Leisten 1 auf einem Rahmen 19, der sich auf Kraftquellen 8' abstützt, montiert sind. Dabei sind die Führungen nicht sichtbar, mit denen der Rahmen 19, dessen Wirkung der der Träger und Kopplungen entspricht, in Richtung zu dem Papiermaschinensieb 3 verschiebbar ist.A further possibility is shown in FIG. 6, in which four strips 1 are mounted on a frame 19 which is supported on power sources 8 '. The guides are not visible, with which the frame 19, the effect of which corresponds to that of the carrier and couplings, can be displaced in the direction of the paper machine wire 3.

In den folgenden Figuren 7 bis 10 sind mögliche Varianten der Erfindung jeweils an nur einer Leiste mit zugehörigem Kraftelement dargestellt.In the following FIGS. 7 to 10, possible variants of the invention are shown in each case on only one bar with an associated force element.

Gemäß Fig. 7 wird eine Kraftquelle verwendet, deren Kraftangriff versetzt hinter dem Kraftangriff an der Leiste 1 erfolgt, während bei der Ausführung der Fig. 8 zur Lösung der Aufgabe eine Kraftquelle 9 vorgesehen ist, deren hintere Wandstruktur 14 so gestaltet ist, daß sie im Betrieb eine stärkere Kraft in Richtung zum Sieb hin erzeugt als die weiter vorne liegenden Bereiche dieser Kraftquelle.According to FIG. 7, a power source is used, the power application of which is offset behind the power application on the bar 1, while in the embodiment of FIG. 8 a power source 9 is provided to solve the task, the rear wall structure 14 of which is designed so that it is in the Operation generates a stronger force towards the screen than the areas of this power source located further forward.

In den Kraftelementen 2, die in Fig. 9 und 10 gezeigt sind, lassen sich die Leisten 1 durch Verschieben der Schiebeteile 12 in Richtung zum Sieb hin einstellen. Diese Schiebeteile werden in Querträgem 21, die sich im wesentlichen über die Papiermaschinenbreite erstrecken, geführt. Als Kraftquelle dient in Fig. 9 ein mit Druckmedium gefüllter, verformbarer Schlauch und in Fig. 10 eine Druckkammer. Die Führungsflächen zwischen dem Querträger 21 und dem Schiebeteil 12 sind durch ein die Reibungskraft herabsetzendes Medium geschmiert. Insbesondere kann man sich vorstellen, daß dazu Wasser verwendet wird, welches in gezielter Menge aus dem Führungsspalt zwischen Querträger 21 und Schiebeteil 12 austritt und zum Säubem bzw. Abspülen der Leiste 1 verwendbar ist.In the force elements 2, which are shown in FIGS. 9 and 10, the strips 1 can be adjusted by moving the sliding parts 12 in the direction of the sieve. These sliding parts are guided in cross members 21 which extend essentially across the width of the paper machine. A deformable hose filled with pressure medium serves as the power source in FIG. 9 and a pressure chamber in FIG. 10. The guide surfaces between the cross member 21 and the sliding part 12 are lubricated by a medium reducing the frictional force. In particular, it can be imagined that water is used for this purpose, which emerges in a targeted amount from the guide gap between cross member 21 and sliding part 12 and can be used for cleaning or rinsing the strip 1.

Auch wenn die Erfindung in den Zeichnungen nur an im wesentlichen horizontal in Laufrichtung hintereinander angeordneten Leisten erläutert wurde, sind auch andere, also schräge oder vertikale möglich, sofem die Siebe entsprechend geführt sind.Even if the invention in the drawings was only explained on strips arranged essentially one behind the other in the running direction, other, that is to say inclined or vertical, are also possible as long as the sieves are guided accordingly.

Es ist ohne weiteres vorstellbar, daß die genannten Ausführungsformen der Erfindung in vorteilhafter Weise kombiniert werden.It is readily conceivable that the aforementioned embodiments of the invention can be combined in an advantageous manner.

Claims (18)

  1. Dewatering apparatus for the wet section of a paper machine with bars (1) which are disposed transversely to the wire running direction,
    - are secured to carriers (5), which are arranged transversely to the running direction, and can be displaced individually or in groups in the direction of the paper machine wire (3),
    - wherein a plurality of series-disposed carriers (5) and bars (1) are in each case combined to form a group, the carriers (5) being mechanically connected together by couplings (5') and displaceable on guides (6) in the direction of the paper machine wire (3),
    - wherein the group of jointly displaceable bars (1) consists of two, three or four bars, so that by combining a relatively small number of individual bars it is still possible to individually displace the individual bars (1) towards the wire (3),
    - wherein the carriers (5) and the couplings (5') are arranged such that they leave sufficient free space for the passage of the water (4') coming from the wire,
    - wherein a desired force or pressure action can be exerted on the paper machine wire by the bars (1) in co-operation with adjustable force elements (2), which are disposed in series when viewed in the running direction (A) of the wire (3), in particular to dewater and form the furnish (4) disposed on the wire (3),
    - wherein the force elements (2) are constructed and positioned such that they can produce additional moments which are able to oppose the tilting moments caused by the frictional forces between the bars (1) and the wire (3).
  2. Dewatering apparatus according to claim 1, characterised in that an element (7), which can move towards the wire, is provided on at least one guide (5) to reinforce the forces acting on the bar (1) and the carrier (5) in the running direction of the wires, and that the carriers (5) are mechanically connected together by rigid couplings (5').
  3. Dewatering apparatus according to claim 1, characterised in that an element (7), which can move towards the wire, is provided on at least one guide (5) to reinforce the forces acting on the bar (1) and the carrier (5) in the running direction of the wires, and that the carriers (5) are mechanically connected together by couplings (5') provided with a joint (5").
  4. Dewatering apparatus according to claim 1, characterised in that at least one force element (2) comprises a force source (8, 8') which is filled or can be filled with pressure medium and the force of which can be adjusted by the pressure medium and is directed towards the wire (3).
  5. Dewatering apparatus according to claim 1, characterised in that at least one force element (2) comprises a force source which is filled or can be filled with pressure medium and the forces of which are directed both towards the wire (3) and against the wire running direction (A), so that the forces acting in the running direction (A) can be at least partly absorbed by this means.
  6. Dewatering apparatus according to claim 1, characterised in that the force element (2) of a bar (1) comprises a hose-like force source which is filled or can be filled with pressure medium and the cross-sectional form of which has its greatest extent in the running direction (A).
  7. Dewatering apparatus according to claim 1, characterised in that the moment which acts against the tilting moment is applied by guides disposed in series in the running direction (A) of the wire (3) and having a low frictional force.
  8. Dewatering apparatus according to claim 1, characterised in that a bar (1) is borne by a slide part (12) which can be displaced in the direction of the wire (3) and is guided in a cross-carrier (21), that the associated force element (2) comprises a force source which is placed in a chamber (11) disposed below the slide part (12), which force source acts on the slide part (12), and that a friction-reducing medium is introduced between the wall of the chamber and the slide part (12).
  9. Dewatering apparatus according to claim 1, characterised in that a bar (1) is borne by a slide part (12) which can be displaced in the direction of the wire (3) and is guided in a cross-carrier (21), and that the associated force element (2) comprises a chamber (11') which is disposed below the slide part (12), is filled or can be filled with pressure medium and the cross-sectional form of which is elongate in the running direction (A).
  10. Dewatering apparatus according to claim 8 or 9, characterised in that the chamber (11, 11') is acted upon by a medium, in particular water, which is used to flush the bar (1).
  11. Dewatering apparatus according to claim 1, characterised in that the force element (2) of a bar (1) comprises a force source (9) which is filled with pressure medium and whose rear wall structure (14), viewed in the running direction (A), is constructed such that it produces a stronger force in the direction of the wire (3) during operation than the regions of this force source which are disposed further to the front.
  12. Dewatering apparatus according to claim 1, characterised in that, viewed in the wire running direction (A), the force element (2) of a bar only comprises one force source (15), the direction of force of which extends towards the wire (3) and which, viewed in the running direction (A), is disposed after the application of force exerted by the bar (1).
  13. Dewatering apparatus according to claim 1, characterised in that the force element (2) of a bar comprises at least two force sources, one of the force sources having a direction of force which does not extend towards the wire (3), or not directly, and being displaceable in the direction of the wire (3).
  14. Dewatering apparatus according to claim 1, characterised in that the moments can be produced by force elements (2) which act on a frame (19) provided with a group of forming bars (1) and at least two of which are disposed in series in the running direction (A).
  15. Dewatering apparatus according to claim 1, characterised in that the moments can be produced by force sources (8'), which act on a frame (19) provided with a group of forming bars (1), and hinged levers, at least two of which hinged levers are disposed in series in the running direction (A) and which permit a parallel movement between the frame (19) and the paper machine support in or against the running direction (A).
  16. Dewatering apparatus according to claim 1, characterised in that it comprises at least two carriers (5) which are disposed in series in the wire running direction, arranged transversely to the running direction, can be displaced on guides (6) in the direction of the paper machine wire (3) and to which at least one bar (1) is in each case secured, wherein an element (7), which can move towards the wire, is provided on at least one guide (6) to reinforce the forces acting on the bar (1) and the carrier (5) in the running direction of the wires, and wherein the carriers (5) are provided with rigidly mounted levers (25, 25') which extend perpendicularly to the direction of displacement, are directed towards one another, are staggered with respect to the direction of displacement of the carriers (5) and between which a force-producing component (26) is disposed.
  17. Dewatering apparatus according to claim 16, characterised in that the force-producing component (26) is a spring bellows which can be filled and by means of which a desired adjustable force can be produced in the direction of displacement of the carriers (5) as it expands to a varying degree.
  18. Dewatering apparatus according to claim 1, characterised in that the free space which is left between the individual force elements (2) is of a magnitude which is such that the water (4') which is removed can be at least partly removed over the entire paper machine width between the force elements.
EP92101206A 1991-03-09 1992-01-25 Dewatering apparatus for the wet section of a papermachine Expired - Lifetime EP0503249B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4107653A DE4107653A1 (en) 1991-03-09 1991-03-09 DRAINAGE DEVICE FOR THE WET SECTION OF A PAPER MACHINE
DE4107653 1991-03-09

Publications (2)

Publication Number Publication Date
EP0503249A1 EP0503249A1 (en) 1992-09-16
EP0503249B1 true EP0503249B1 (en) 1996-06-19

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Application Number Title Priority Date Filing Date
EP92101206A Expired - Lifetime EP0503249B1 (en) 1991-03-09 1992-01-25 Dewatering apparatus for the wet section of a papermachine

Country Status (6)

Country Link
US (1) US5262010A (en)
EP (1) EP0503249B1 (en)
JP (1) JPH04333690A (en)
AT (1) ATE139587T1 (en)
CA (1) CA2062394A1 (en)
DE (1) DE4107653A1 (en)

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Also Published As

Publication number Publication date
JPH04333690A (en) 1992-11-20
EP0503249A1 (en) 1992-09-16
CA2062394A1 (en) 1992-09-10
ATE139587T1 (en) 1996-07-15
US5262010A (en) 1993-11-16
DE4107653A1 (en) 1992-09-10

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