EP2002052B1 - Doctor-blade-retaining device with doctor-blade carrier - Google Patents

Doctor-blade-retaining device with doctor-blade carrier Download PDF

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Publication number
EP2002052B1
EP2002052B1 EP07727094A EP07727094A EP2002052B1 EP 2002052 B1 EP2002052 B1 EP 2002052B1 EP 07727094 A EP07727094 A EP 07727094A EP 07727094 A EP07727094 A EP 07727094A EP 2002052 B1 EP2002052 B1 EP 2002052B1
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EP
European Patent Office
Prior art keywords
scraper blade
blade
doctor blade
holding device
doctor
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.)
Not-in-force
Application number
EP07727094A
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German (de)
French (fr)
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EP2002052A1 (en
Inventor
Helmut Strauch
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.)
Joh Clouth GmbH and Co KG
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Joh Clouth GmbH and Co KG
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Application filed by Joh Clouth GmbH and Co KG filed Critical Joh Clouth GmbH and Co KG
Publication of EP2002052A1 publication Critical patent/EP2002052A1/en
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Publication of EP2002052B1 publication Critical patent/EP2002052B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G3/00—Doctors
    • D21G3/005—Doctor knifes

Definitions

  • the invention relates to a doctor blade holding device, which has a receiving unit which is provided for receiving a scraper blade.
  • Such a doctor blade holding device can be used, for example, in a paper mill in papermaking or in the steel industry. It usually serves to receive a scraper blade for the purpose of uniform contact of the same with a rotating roller in order to clean its surface during operation.
  • a roller may have a diameter of, for example, 1 m-6 m and a length of up to 10 m.
  • the scraper blade provided for cleaning such a roller must rest over the entire length of the roller as uniformly as possible at a predetermined angle to the roller.
  • the doctor blade is generally applied to the roll at a line pressure of between 100 and 400 Newtons per meter.
  • a conventional scraper blade has a length of up to 10 m, a width of 7.5 cm and a thickness of 1.5 mm.
  • a conventional doctor blade is made of carbon fiber material.
  • the scraper blade During operation of the scraper blade, the area of the scraper blade resting against the roller is more and more ground, so that the remaining width of the scraper blade is increasingly reduced. If the scraper blade has reached a width of, for example, 6.5 cm, then it is considered to be used up and is replaced by a new scraper blade.
  • the doctor blade consists of an interchangeable blade, which is pressed in operation directly to the surface of a roller, and a holding blade, which forms a support for the interchangeable blade.
  • the interchangeable blade is an endless blade wound on a roll which, in use, is applied to the surface of the rotating roll and the other end is wound on a take-up roll. In each case, a portion of the endless blade with the roll surface in contact. If this portion is worn, then the endless blade can be further rolled up, so that a new portion of the endless blade can be contacted with the roll surface.
  • the object of the invention is to show a way in which the costs of cleaning the surface of a rotating roller can be reduced.
  • the advantages of the invention are, in particular, that because of the use of an additional scraper-blade carrier, scraper blades with a smaller width can be used.
  • a scraper blade carrier a material is used which is much less expensive than the material of which a scraper blade is made, and since scrapers with a smaller width can be used, the cost of cleaning the surface of a rotating roller becomes clear in comparison with the prior art reduced.
  • the scraper blade carrier according to the invention is preferably formed in one of its end regions as well as a conventional scraper blade and is inserted with this end portion in the receiving unit of the Shuberklingenhaltevorraum.
  • fastening means for a doctor blade are provided in the region of the doctor blade carrier protruding from the receiving unit.
  • a scraper blade is used, which may have a much smaller width compared to the prior art, for example 3 - 4 cm. For example, about 2 to 3 cm of this scraper blade project beyond the end of the scraper blade carrier in the direction of the roller to be processed.
  • the scraper blade carrier according to the invention which is inserted into the receiving unit of the doctor blade holding device, can also be used in connection with the new doctor blade in the case of a replacement of a scraper blade.
  • the fastening means by means of which the scraper blade is attached to the doctor blade carrier, have a fixing strip and a fixing spring connected to the fixing strip. This allows a simple and quick withdrawal of a spent doctor blade from the doctor blade holder and a simple and fast insertion of a new doctor blade in the doctor blade holder. Especially This extraction and insertion can be done without the use of tools.
  • the doctor blade carrier is provided with bores and the fastening means are connected to the doctor blade carrier by means of screws guided through the bores, the sufficiently fixed fixation of the doctor blade required for the cleaning operation is ensured. On the other hand, if necessary, the screws can be loosened and the fasteners removed from the doctor blade carrier, for example for the purpose of replacement or cleaning.
  • a welding of the fastener with the Schaberklingen has the advantage of ensuring a sufficiently firm fixation of the doctor blade with reduced expenditure of time for the attachment of the fastener on Schaberklingenotwithstanding, but does not allow subsequent removal of the fastener from Schaberklingendozens.
  • the doctor blade can be inserted in a simple manner between the fixing strip and the doctor blade carrier until it rests on the fixing strip.
  • the individual components of the fastening means are made of stainless steel, whereby a long-term use is ensured during operation.
  • doctor blade holding device is based on a doctor blade holding device, as shown in the WO 2004/042143 is described. It has a base plate 6 which is substantially U-shaped and has two short and one long Begrenzüngswand. In the end of one of the short boundary walls, a bearing tube 5 is arranged, which is part of the base plate. The bearing tube 5 is mounted within a slotted square tube 4 and rotatable about a small angle to this.
  • the square tube 4 may be constructed segment-shaped in the direction perpendicular to the plane to affect the elasticity of the cover plate 2 as little as possible.
  • the square tube is firmly connected to the cover plate 2, preferably by means of a plurality of screw connections, which are arranged perpendicular to the plane one behind the other, but are not shown in the drawing.
  • the cover plate 2 is preferably made of carbon fiber material and may have a plurality of carbon fiber layers. As a result, the cover plate is flexible and can adapt well to the surface of each roller to be cleaned.
  • finger devices 3 are fastened to the cover plate by means of screw connections 3 a, which are also arranged one behind the other perpendicular to the plane of the drawing.
  • a scraper blade carrier 8 is used in contrast to the prior art.
  • This introduction of the doctor blade carrier is preferably carried out by insertion in the axial direction, ie in a direction perpendicular to the plane of the drawing.
  • the back area the doctor blade carrier is formed as well as the rear portion of a conventional doctor blade, so that no structural changes of the receiving unit are necessary to accommodate a Schaberklingenanii invention instead of a conventional doctor blade can. Since the rear portion of the doctor blade carrier 8 is provided with a rivet or spring 15, the doctor blade carrier 8 can not be pulled out in the direction of the roller to be cleaned during operation of the device.
  • fastening means 10, 11, 12 for a doctor blade 1 In its protruding from the receiving unit 2.3 area of the truss blade carrier 8 is provided with fastening means 10, 11, 12 for a doctor blade 1. These fasteners include an angularly shaped fixing strip 11, a fixation associated with the fixing bar 12 and screws 10. These screws are passed through holes 13 of the Schaberklingenarmes 8 and screwed into an internal thread of the angle-shaped fixing strip 11 to this fixing strip 11 fixed to the Schaberklingenarme 8 to connect.
  • the fixing spring 12 forms either together with the fixing strip 11 is a one-piece component or is welded to the fixing strip.
  • the fixing spring is provided to press a scraper blade 1 inserted between the front end area of the scraper blade carrier 8 and the fixing unit 11 against the scraper blade carrier 8 so that the scraper blade 1 has the required fixed positioning at a predetermined angle relative to the roller to be cleaned during the cleaning operation of the roller ,
  • the fixing strip 11 can also be welded to the Schaberklingenucc 8.
  • the doctor blade carrier 8, the fixing strip 11 and the fixing spring 12 made of stainless steel, so that a long-term use of these components is ensured.
  • the doctor blade carrier 8 has, for example, a length of up to 10 m, a width of 5 cm and a thickness of 1.5 mm. It is resilient, so that diameter deviations of the roller can be compensated.
  • the length of the doctor blade carrier extends in the axial direction of the roller or perpendicular to the plane of the drawing.
  • the width b of the doctor blade carrier and the thickness d of the doctor blade carrier are marked in FIG.
  • the scraper blade 1 fastened to the scraper blade carrier 8 by means of the fastening means 10, 11, 12 can have a substantially smaller width than the scraper blades known from the prior art.
  • the doctor blades known from the prior art have, for example, a width of 7.5 cm, as already explained above.
  • the back or bottom of these known doctor blades is inserted directly into the receiving unit of the known doctor blade holder. Since, after a successful during the cleaning operation grinding the doctor blade to about 1 cm, ie when reaching a width of about 6.5 cm, the doctor blade is considered to be consumed and disposed of, must in the prior art, a relatively large part of the doctor blade be disposed of. This procedure is costly and does not spare the environmental resources.
  • a doctor blade whose width is, for example, only 3.5 cm can be used.
  • the underside of this doctor blade is not inserted into the receiving unit of the doctor blade holding device, but fastened by means of fastening means on a Schaberklingenarme, which in turn is inserted into the receiving unit of the doctor blade holder.
  • the scraper wearer can also after a replacement of a consumed Scraper blade can be reused.
  • the scraper blade used in the invention is ground in operation as well as a known scraper blade by about 1 cm and then considered to be used up and replaced with a new doctor blade.
  • the part of the spent doctor blade has to be disposed in this embodiment only has a width of about 2.5 cm, so that in comparison to the prior art much less doctor blade material must be disposed of.
  • a pneumatic air hose 14 is provided in the interior of the U-shaped base plate 6. This is provided at its one end with an air connection, through which air can be pressed into the hose and also air from the hose can be omitted. The other end of the tube 14 is closed. Between the tube 14 and the long boundary wall of the U-shaped base plate 6, a plastic insert 7 is provided. This is loosely inserted, glued or screwed on the inside of the base plate and prevents the hose 14 comes into contact with a possibly hot boundary wall during operation of the device.
  • a first spring plate 16 one end of which at the Base plate 6 is fixed, for example, welded.
  • the other end region of the spring plate 16 is supported on the cover plate 2.
  • the spring plate 16 serves inter alia as dust protection, so that no dust can penetrate into the slot of the slotted square tubes 4.
  • a second spring plate 18 is secured to the cover plate 2 by means of a screw or rivet connection 20, which bridges the area between the end of the boundary wall 9 of the base plate 6 and the cover plate 2 and on the outside of the Boundary wall 9 of the base plate 6 is supported.
  • This spring plate 18 also serves as dust protection or dirt seal.
  • the spring plate 18 slides both in an increase as well as a decrease in the air pressure in the hose 14 on the outer surface of the boundary wall 9 along.
  • an adapter bar 17 is firmly connected, for example using screws 21.
  • This adapter bar 17 is on the remote from the cover plate 2 Outside of the spring plate 16 and the base plate 6 is positioned.
  • FIG. 1 is shown after all a scraper blade holding device, in which the pivoting plane of the doctor blade holding device is formed and arranged in a special way.
  • the in the FIG. 1 Schaberklingenhaltevoriques shown requires only an air hose, since the bringing about the starting position of the cover plate is effected by the force of the spring plate 16.
  • this forms from the base plate 6, the spring plate 18, a part of the cover plate 2, the square tube. 4 and the spring plate 16 formed a substantially dustproof unit system.

Landscapes

  • Paper (AREA)
  • Cleaning In General (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Coating With Molten Metal (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

Scraper blade holder comprising a receptacle for a blade carrier (8) equipped with a fixing strip (11) comprises a fixing spring (12) attached to the fixing strip.

Description

Die Erfindung betrifft eine Schaberklingenhaltevorrichtung, welche eine Aufnahmeeinheit aufweist, die zur Aufnahme einer Schaberklinge vorgesehen ist.The invention relates to a doctor blade holding device, which has a receiving unit which is provided for receiving a scraper blade.

Eine derartige Schaberklingenhaltevorrichtung kann beispielsweise in einer Papierfabrik im Rahmen der Papierherstellung oder in der Stahlindustrie verwendet werden. Sie dient üblicherweise zur Aufnahme einer Schaberklinge zwecks gleichmäßiger Anlage derselben an eine rotierende Walze bzw. Rolle, um deren Oberfläche während des Betriebes zu reinigen. Eine derartige Walze kann einen Durchmesser von beispielsweise 1 m - 6 m und eine Länge von bis zu 10 m aufweisen. Die zur Reinigung einer solchen Walze vorgesehene Schaberklinge muss über die gesamte Länge der Walze möglichst gleichmäßig unter einem vorgegebenen Winkel an der Walze anliegen. Um dies zu erreichen, wird die Schaberklinge im Allgemeinen mit einem Liniendruck zwischen 100 und 400 Newton pro Meter an die Walze angelegt. Eine herkömmliche Schaberklinge hat beispielsweise bis zu 10 m Länge, 7,5 cm Breite und 1,5 mm Dicke. Eine herkömmliche Schaberklinge besteht beispielsweise aus Kohlefasermaterial.Such a doctor blade holding device can be used, for example, in a paper mill in papermaking or in the steel industry. It usually serves to receive a scraper blade for the purpose of uniform contact of the same with a rotating roller in order to clean its surface during operation. Such a roller may have a diameter of, for example, 1 m-6 m and a length of up to 10 m. The scraper blade provided for cleaning such a roller must rest over the entire length of the roller as uniformly as possible at a predetermined angle to the roller. To accomplish this, the doctor blade is generally applied to the roll at a line pressure of between 100 and 400 Newtons per meter. For example, a conventional scraper blade has a length of up to 10 m, a width of 7.5 cm and a thickness of 1.5 mm. For example, a conventional doctor blade is made of carbon fiber material.

Im Betrieb der Schaberklinge wird der an der Walze anliegende Bereich der Schaberklinge mehr und mehr abgeschliffen, so dass die verbleibende Breite der Schaberklinge zunehmend reduziert wird. Hat die Schaberklinge ein Breite von beispielsweise 6,5 cm erreicht, dann gilt sie als aufgebraucht und wird durch eine neue Schaberklinge ersetzt.During operation of the scraper blade, the area of the scraper blade resting against the roller is more and more ground, so that the remaining width of the scraper blade is increasingly reduced. If the scraper blade has reached a width of, for example, 6.5 cm, then it is considered to be used up and is replaced by a new scraper blade.

Aus der JP 09041287 A ist eine Schabervorrichtung mit einer transportablen Schaberklinge bekannt. Bei dieser bekannten Vorrichtung besteht die Schaberklinge aus einer Wechselklinge, welche im Betrieb direkt an die Oberfläche einer Walze angedrückt wird, und einer Halteklinge, welche einen Träger für die Wechselklinge bildet. Bei der Wechselklinge handelt es sich um eine auf einer Rolle aufgewickelte Endlosklinge, die im Betrieb an die Oberfläche der rotierenden Walze angelegt wird und deren anderes Ende auf einer Aufnahmerolle aufgewickelt wird. Dabei ist jeweils ein Teilbereich der Endlosklinge mit der Walzenoberfläche im Kontakt. Ist dieser Teilbereich abgenutzt, dann kann die Endlosklinge weiter aufgerollt werden, so dass ein neuer Teilbereich der Endlosklinge mit der Walzenoberfläche kontaktiert werden kann.From the JP 09041287 A is a scraper device with a portable scraper blade known. In this known device, the doctor blade consists of an interchangeable blade, which is pressed in operation directly to the surface of a roller, and a holding blade, which forms a support for the interchangeable blade. The interchangeable blade is an endless blade wound on a roll which, in use, is applied to the surface of the rotating roll and the other end is wound on a take-up roll. In each case, a portion of the endless blade with the roll surface in contact. If this portion is worn, then the endless blade can be further rolled up, so that a new portion of the endless blade can be contacted with the roll surface.

Die Aufgabe der Erfindung besteht darin, einen Weg aufzuzeigen, wie die Kosten der Reinigung der Oberfläche einer rotierenden Walze reduziert werden können.The object of the invention is to show a way in which the costs of cleaning the surface of a rotating roller can be reduced.

Diese Aufgabe wird durch eine Schaberklingenhaltevorrichtung mit den im Anspruch 1 angegebenen Merkmalen gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.This object is achieved by a doctor blade holding device having the features specified in claim 1. Advantageous embodiments and modifications of the invention will become apparent from the dependent claims.

Die Vorteile der Erfindung bestehen insbesondere darin, dass aufgrund der Verwendung eines zusätzlichen Schaber-klingenträgers Schaberklingen mit geringerer Breite verwendet werden können. Da als Schaberklingenträger-ein Werkstoff verwendet wird, der wesentlich preisgünstiger ist als der Werkstoff, aus welchem eine Schaberklinge besteht, und da Schaberklingen mit geringerer Breite verwendet werden können, werden die Kosten der Reinigung der Oberfläche einer rotierenden Walze im Vergleich zum Stand der Technik deutlich reduziert.The advantages of the invention are, in particular, that because of the use of an additional scraper-blade carrier, scraper blades with a smaller width can be used. As a scraper blade carrier, a material is used which is much less expensive than the material of which a scraper blade is made, and since scrapers with a smaller width can be used, the cost of cleaning the surface of a rotating roller becomes clear in comparison with the prior art reduced.

Der Schaberklingenträger gemäß der Erfindung ist in einem seiner Endbereiche vorzugsweise ebenso ausgebildet wie eine herkömmliche Schaberklinge und ist mit diesem Endbereich in die Aufnahmeeinheit der Schäberklingenhaltevorrichtung eingesetzt. In dem aus der Aufnahmeeinheit hinausragenden Bereich des Schaberklingenträgers sind Befestigungsmittel für eine Schaberklinge vorgesehen. In diese Befestigungsmittel ist eine Schaberklinge eingesetzt, die im Vergleich zum Stand der Technik eine wesentlich geringere Breite aufweisen kann, beispielsweise 3 - 4 cm. Von dieser Schaberklinge ragen wiederum beispielsweise etwa 2 - 3 cm über das Ende des Schaberklingenträgers in Richtung der zu bearbeitenden Walze hinaus. Von diesem überstehenden Bereich der Schaberklinge wird im Betrieb ebenso wie beim Stand der Technik etwa 1 cm angeschliffen, bis die Schäberklinge als verbraucht gilt und ausgewechselt und anschließen entsorgt wird. Im Unterschied zum Stand der Technik muss jedoch weit weniger Schaberklingenmaterial entsorgt werden.The scraper blade carrier according to the invention is preferably formed in one of its end regions as well as a conventional scraper blade and is inserted with this end portion in the receiving unit of the Schäberklingenhaltevorrichtung. In the region of the doctor blade carrier protruding from the receiving unit, fastening means for a doctor blade are provided. In these fasteners a scraper blade is used, which may have a much smaller width compared to the prior art, for example 3 - 4 cm. For example, about 2 to 3 cm of this scraper blade project beyond the end of the scraper blade carrier in the direction of the roller to be processed. From this projecting area of the scraper blade is ground in operation as well as in the prior art about 1 cm until the Schäberklinge is considered to be used up and replaced and then disposed of. In contrast to the prior art, however, far less doctor blade material must be disposed of.

Dadurch werden die Kosten für die Reinigung der Oberfläche einer rotierenden Walze reduziert sowie Umweltressourcen geschont, da beispielsweise weniger Kohlefasermaterial benötigt wird. Der Schaberklingenträger gemäß der Erfindung, der in die Aufnahmeeinheit der Schaberklingenhaltevorrichtung eingesetzt ist, kann im Falle eines Austausches einer Schaberklinge auch im Zusammenhang mit der neuen Schaberklinge weiter verwendet werden.This reduces the costs of cleaning the surface of a rotating roller and protects environmental resources, since, for example, less carbon fiber material is needed. The scraper blade carrier according to the invention, which is inserted into the receiving unit of the doctor blade holding device, can also be used in connection with the new doctor blade in the case of a replacement of a scraper blade.

Die Befestigungsmittel, mittels welcher die Schaberklinge an dem Schaberklingenträger befestigt ist, weisen eine Fixierleiste und eine mit der Fixierleiste verbundene Fixierfeder auf. Dies erlaubt ein einfaches und schnelles Herausziehen einer aufgebrauchten Schaberklinge aus der Schaberklingenhaltevorrichtung sowie ein einfaches und schnelles Einschieben einer neuen Schaberklinge in die Schaberklingenhaltevorrichtung. Insbesondere kann dieses Herausziehen und Einschieben ohne Verwendung von Werkzeug erfolgen.The fastening means, by means of which the scraper blade is attached to the doctor blade carrier, have a fixing strip and a fixing spring connected to the fixing strip. This allows a simple and quick withdrawal of a spent doctor blade from the doctor blade holder and a simple and fast insertion of a new doctor blade in the doctor blade holder. Especially This extraction and insertion can be done without the use of tools.

Ist der Schaberklingenträger mit Bohrungen versehen und sind die Befestigungsmittel mittels durch die Bohrungen geführter Schrauben mit dem Schaberklingenträger verbunden, dann ist die für den Reinigungsbetrieb erforderliche hinreichend feste Fixierung der Schaberklinge sichergestellt. Andererseits können bei Bedarf die Schrauben gelöst und die Befestigungsmittel vom Schaberklingenträger entfernt werden, beispielsweise zum Zwecke eines Austausches oder einer Reinigung.If the doctor blade carrier is provided with bores and the fastening means are connected to the doctor blade carrier by means of screws guided through the bores, the sufficiently fixed fixation of the doctor blade required for the cleaning operation is ensured. On the other hand, if necessary, the screws can be loosened and the fasteners removed from the doctor blade carrier, for example for the purpose of replacement or cleaning.

Eine Verschweißung der Befestigungsmittel mit dem Schaberklingenträger hat den Vorteil der Sicherstellung einer hinreichend festen Fixierung der Schaberklinge bei reduziertem Zeitaufwand für die Anbringung der Befestigungsmittel am Schaberklingenträger, erlaubt jedoch kein nachträgliches Entfernen der Befestigungsmittel vom Schaberklingenträger.A welding of the fastener with the Schaberklingenträger has the advantage of ensuring a sufficiently firm fixation of the doctor blade with reduced expenditure of time for the attachment of the fastener on Schaberklingenträger, but does not allow subsequent removal of the fastener from Schaberklingenträger.

Ist die Fixierleiste winkelförmig ausgebildet, dann kann die Schaberklinge in einfacher Weise zwischen die Fixierleiste und den Schaberklingenträger eingeschoben werden, bis sie auf der Fixierleiste aufliegt.If the fixing strip is of angular design, then the doctor blade can be inserted in a simple manner between the fixing strip and the doctor blade carrier until it rests on the fixing strip.

Vorzugsweise bestehen die einzelnen Bestandteile der Befestigungsmittel aus rostfreiem Edelstahl, wodurch ein langjähriger Gebrauch im Betrieb sichergestellt ist.Preferably, the individual components of the fastening means are made of stainless steel, whereby a long-term use is ensured during operation.

Weitere vorteilhafte Eigenschaften der Erfindung ergeben sich aus deren beispielhafter Erläuterung anhand der Figuren. Es zeigt

Figur 1
ein Ausführungsbeispiel für eine Schaberklingenhaltevorrichtung gemäß der Erfindung und
Figur 2
eine vergrößerte Darstellung eines Teils der in der Figur 1 dargestellten Vorrichtung.
Further advantageous features of the invention will become apparent from the exemplification thereof with reference to the figures. It shows
FIG. 1
an embodiment of a doctor blade holding device according to the invention and
FIG. 2
an enlarged view of a part of in the FIG. 1 illustrated device.

Die in der Figur 1 dargestellte Schaberklingenhaltevorrichtung geht aus von einer Schaberklingenhaltevorrichtung, wie sie in der WO 2004/042143 beschrieben ist. Sie weist eine Grundplatte 6 auf, die im Wesentlichen U-förmig ausgebildet ist und zwei kurze und eine lange Begrenzüngswand aufweist. Im Endbereich einer der kurzen Begrenzungswände ist ein Lagerrohr 5 angeordnet, welches Bestandteil der Grundplatte ist. Das Lagerrohr 5 ist innerhalb eines geschlitzten Vierkantrohres 4 und um einen kleinen Winkel drehbar zu diesem gelagert. Das Vierkantrohr 4 kann in Richtung senkrecht zur Zeichenebene segmentförmig aufgebaut sein, um die Elastizität der Deckplatte 2 möglichst wenig zu beeinträchtigen.The in the FIG. 1 shown doctor blade holding device is based on a doctor blade holding device, as shown in the WO 2004/042143 is described. It has a base plate 6 which is substantially U-shaped and has two short and one long Begrenzüngswand. In the end of one of the short boundary walls, a bearing tube 5 is arranged, which is part of the base plate. The bearing tube 5 is mounted within a slotted square tube 4 and rotatable about a small angle to this. The square tube 4 may be constructed segment-shaped in the direction perpendicular to the plane to affect the elasticity of the cover plate 2 as little as possible.

Das Vierkantrohr ist mit der Deckplatte 2 fest verbunden, vorzugsweise mittels einer Vielzahl von Schraubverbindungen, die senkrecht zur Zeichenebene hintereinander angeordnet sind, in der Zeichnung aber nicht dargestellt sind. Die Deckplatte 2 besteht vorzugsweise aus Kohlefasermaterial und kann mehrere Kohlefaserschichten aufweisen. Dadurch ist die Deckplatte flexibel und kann sich an die Oberfläche der jeweils zu reinigenden Walze gut anpassen.The square tube is firmly connected to the cover plate 2, preferably by means of a plurality of screw connections, which are arranged perpendicular to the plane one behind the other, but are not shown in the drawing. The cover plate 2 is preferably made of carbon fiber material and may have a plurality of carbon fiber layers. As a result, the cover plate is flexible and can adapt well to the surface of each roller to be cleaned.

Im vorderen Endbereich der Deckplatte 2 sind mittels Schraubverbindungen 3a Fingervorrichtungen 3 an der Deckplatte befestigt, die ebenfalls senkrecht zur Zeichenebene hintereinander angeordnet sind. Zwischen der Deckplatte 2 und den Fingervorrichtungen 3, welche eine Aufnahmeeinheit bilden, in welche üblicherweise eine Schaberklinge eingesetzt wird, wird im Unterschied zum Stand der Technik ein Schaberklingenträger 8 eingesetzt. Dieses Einbringen des Schaberklingenträgers erfolgt vorzugsweise durch ein Einschieben in Axialrichtung, d. h. in einer Richtung senkrecht zur Zeichenebene. Der hintere Bereich des Schaberklingenträgers ist ebenso ausgebildet wie der hintere Bereich einer üblichen Schaberklinge, so dass keinerlei bauliche Veränderungen der Aufnahmeeinheit notwendig sind, um anstelle einer üblichen Schaberklinge einen erfindungsgemäßen Schaberklingenträger aufnehmen zu können. Da der hintere Bereich des Schaberklingenträgers 8 mit einer Niete oder Feder 15 versehen ist, kann der Schaberklingenträger 8 im Betrieb der Vorrichtung nicht in Richtung der zu reinigenden Walze herausgezogen werden.In the front end region of the cover plate 2, finger devices 3 are fastened to the cover plate by means of screw connections 3 a, which are also arranged one behind the other perpendicular to the plane of the drawing. Between the cover plate 2 and the finger devices 3, which form a receiving unit, in which a scraper blade is usually used, a scraper blade carrier 8 is used in contrast to the prior art. This introduction of the doctor blade carrier is preferably carried out by insertion in the axial direction, ie in a direction perpendicular to the plane of the drawing. The back area the doctor blade carrier is formed as well as the rear portion of a conventional doctor blade, so that no structural changes of the receiving unit are necessary to accommodate a Schaberklingenträger invention instead of a conventional doctor blade can. Since the rear portion of the doctor blade carrier 8 is provided with a rivet or spring 15, the doctor blade carrier 8 can not be pulled out in the direction of the roller to be cleaned during operation of the device.

In seinem aus der Aufnahmeeinheit 2,3 hinausragenden Bereich ist der Schäbenklingenträger 8 mit Befestigungsmitteln 10, 11, 12 für eine Schaberklinge 1 versehen. Zu diesen Befestigungsmitteln gehören eine winkelförmig ausgebildete Fixierleiste 11, eine mit der Fixierleiste verbundene Fixierfeder 12 und Schrauben 10. Diese Schrauben sind durch Bohrungen 13 des-Schaberklingenträgers 8 geführt und in ein Innengewinde der winkelförmig ausgebildeten Fixierleiste 11 eingeschraubt, um diese Fixierleiste 11 fest mit dem Schaberklingenträger 8 zu verbinden. Die Fixierfeder 12 bildet entweder zusammen mit der Fixierleiste 11 ein einstückiges Bauteil oder ist mit der Fixierleiste verschweißt. Die Fixierfeder ist dazu vorgesehen, eine zwischen dem vorderen Endbereich des Schaberklingenträgers 8 und der Fixiereinheit 11 eingeschobene Schaberklinge 1 an den Schaberklingenträger 8 anzupressen, so dass die Schaberklinge 1 im Reinigungsbetrieb der Walze die erforderliche feste Positionierung in einem vorgegebenen Winkel relativ zur zu reinigenden Walze aufweist.In its protruding from the receiving unit 2.3 area of the truss blade carrier 8 is provided with fastening means 10, 11, 12 for a doctor blade 1. These fasteners include an angularly shaped fixing strip 11, a fixation associated with the fixing bar 12 and screws 10. These screws are passed through holes 13 of the Schaberklingenträgers 8 and screwed into an internal thread of the angle-shaped fixing strip 11 to this fixing strip 11 fixed to the Schaberklingenträger 8 to connect. The fixing spring 12 forms either together with the fixing strip 11 is a one-piece component or is welded to the fixing strip. The fixing spring is provided to press a scraper blade 1 inserted between the front end area of the scraper blade carrier 8 and the fixing unit 11 against the scraper blade carrier 8 so that the scraper blade 1 has the required fixed positioning at a predetermined angle relative to the roller to be cleaned during the cleaning operation of the roller ,

Alternativ zur vorstehend beschriebenen Verschraubung der Fixierleiste 11 mit dem Schaberklingenträger 8 kann die Fixierleiste auch mit dem Schaberklingenträger 8 verschweißt sein.Alternatively to the above-described screwing the fixing strip 11 with the Schaberklingenträger 8, the fixing strip can also be welded to the Schaberklingenträger 8.

Vorzugsweise bestehen der Schaberklingenträger 8, die Fixierleiste 11 und die Fixierfeder 12 aus rostfreiem Edelstahl, so dass ein langjähriger Gebrauch dieser Bauteile sichergestellt ist. Der Schaberklingenträger 8 hat beispielsweise eine Länge von bis zu 10 m, eine Breite von 5 cm und eine Dicke von 1,5 mm. Er ist federnd ausgebildet, so dass Durchmesserabweichungen der Walze ausgeglichen werden können. Die Länge des Schaberklingenträgers erstreckt sich in Axialrichtung der Walze bzw. senkrecht zur Zeichenebene. Die Breite b des Schaberklingenträgers und die Dicke d des Schaberklingenträgers sind in der Figur 2 gekennzeichnet.Preferably, the doctor blade carrier 8, the fixing strip 11 and the fixing spring 12 made of stainless steel, so that a long-term use of these components is ensured. The doctor blade carrier 8 has, for example, a length of up to 10 m, a width of 5 cm and a thickness of 1.5 mm. It is resilient, so that diameter deviations of the roller can be compensated. The length of the doctor blade carrier extends in the axial direction of the roller or perpendicular to the plane of the drawing. The width b of the doctor blade carrier and the thickness d of the doctor blade carrier are marked in FIG.

Die mittels der Befestigungsmittel 10, 11, 12 am Schaberklingenträger 8 befestigte Schaberklinge 1 kann im Vergleich zu den aus dem Stand der Technik bekannten Schaberklingen eine wesentlich geringere Breite aufweisen. Die aus dem Stand der Technik bekannten Schaberklingen weisen - wie bereits oben ausgeführt wurde - beispielsweise eine Breite von 7,5 cm auf. Die Rückseite bzw. Unterseite dieser bekannten Schaberklingen ist direkt in die Aufnahmeeinheit der bekannten Schaberklingenhaltevorrichtung eingesetzt. Da nach einem während des Reinigungsbetriebes erfolgenden Abschleifen der Schaberklinge um ca. 1 cm, d. h. beim Erreichen einer Breite von ca. 6,5 cm, die Schaberklinge als verbraucht angesehen wird und entsorgt wird, muss beim Stand der Technik ein vergleichsweise großer Teil der Schaberklinge entsorgt werden. Diese Vorgehensweise ist kostenaufwendig und schont die Umweltressourcen nicht. Bei der vorliegenden Erfindung kann eine Schaberklinge verwendet werden, deren Breite beispielsweise nur 3,5 cm beträgt.' Die Unterseite dieser Schaberklinge ist nicht in die Aufnahmeeinheit der Schaberklingenhaltevorrichtung eingesetzt, sondern mittels Befestigungsmitteln an einem Schaberklingenträger befestigt, der seinerseits in die Aufnahmeeinheit der Schaberklingenhaltevorrichtung eingesetzt ist. Der Schaberklingenträger kann auch nach einem Ersetzen einer verbrauchten Schaberklinge weiterverwendet werden. Die Schaberklinge, die bei der Erfindung zur Anwendung kommt, wird im Betrieb ebenso wie eine bekannte Schaberklinge um etwa 1 cm abgeschliffen und dann als verbraucht angesehen und durch eine neue Schaberklinge ersetzt. Der zu entsorgende Teil der verbrauchten Schaberklinge hat bei diesem Ausführungsbeispiel nur noch eine Breite von etwa 2,5 cm, so dass im Vergleich zum Stand der Technik wesentlich weniger Schaberklingenmaterial entsorgt werden muss.The scraper blade 1 fastened to the scraper blade carrier 8 by means of the fastening means 10, 11, 12 can have a substantially smaller width than the scraper blades known from the prior art. The doctor blades known from the prior art have, for example, a width of 7.5 cm, as already explained above. The back or bottom of these known doctor blades is inserted directly into the receiving unit of the known doctor blade holder. Since, after a successful during the cleaning operation grinding the doctor blade to about 1 cm, ie when reaching a width of about 6.5 cm, the doctor blade is considered to be consumed and disposed of, must in the prior art, a relatively large part of the doctor blade be disposed of. This procedure is costly and does not spare the environmental resources. In the present invention, a doctor blade whose width is, for example, only 3.5 cm can be used. The underside of this doctor blade is not inserted into the receiving unit of the doctor blade holding device, but fastened by means of fastening means on a Schaberklingenträger, which in turn is inserted into the receiving unit of the doctor blade holder. The scraper wearer can also after a replacement of a consumed Scraper blade can be reused. The scraper blade used in the invention is ground in operation as well as a known scraper blade by about 1 cm and then considered to be used up and replaced with a new doctor blade. The part of the spent doctor blade has to be disposed in this embodiment only has a width of about 2.5 cm, so that in comparison to the prior art much less doctor blade material must be disposed of.

Um den jeweils gewünschten Anpressdruck der Schaberklinge an die Oberfläche der zu reinigenden Walze einzustellen, ist im Innenbereich der U-förmigen Grundplatte 6 ein pneumatischer Luftschlauch 14 vorgesehen. Dieser ist an seinem einen Ende mit einem Luftanschluss versehen, durch welchen Luft in den Schlauch gepresst werden kann und auch wieder Luft aus dem Schlauch ausgelassen werden kann. Das andere Ende des Schlauches 14 ist verschlossen. Zwischen dem Schlauch 14 und der langen Begrenzungswand der U-förmigen Grundplatte 6 ist eine Kunststoffeinlage 7 vorgesehen. Diese ist auf die Innenseite der Grundplatte lose eingelegt, aufgeklebt oder angeschraubt und verhindert, dass im Betrieb der Vorrichtung der Schlauch 14 mit einer möglicherweise heißen Begrenzungswand in Berührung kommt.In order to set the particular desired contact pressure of the doctor blade to the surface of the roller to be cleaned, a pneumatic air hose 14 is provided in the interior of the U-shaped base plate 6. This is provided at its one end with an air connection, through which air can be pressed into the hose and also air from the hose can be omitted. The other end of the tube 14 is closed. Between the tube 14 and the long boundary wall of the U-shaped base plate 6, a plastic insert 7 is provided. This is loosely inserted, glued or screwed on the inside of the base plate and prevents the hose 14 comes into contact with a possibly hot boundary wall during operation of the device.

Wird der Luftdruck im Schlauch 14 erhöht, dann dehnt sich dieser aus. Dies bewirkt, dass im Bereich des Schlauches 14 die Deckplatte 2 von der Grundplatte 6 weggedrückt wird. Dies wiederum hat zur Folge, dass die Schaberklinge 1 sich in Richtung des Pfeiles x bewegt bzw. in Richtung x gedrückt wird. Dadurch wird die Schaberklinge an die zu reinigende Walzenoberfläche angelegt und der gewünschte Anpressdruck über ein Druckregelventil eingestellt.If the air pressure in the hose 14 is increased, then this expands. This causes the cover plate 2 is pushed away from the base plate 6 in the region of the tube 14. This in turn has the result that the scraper blade 1 moves in the direction of the arrow x or is pressed in the direction x. As a result, the doctor blade is applied to the roll surface to be cleaned and set the desired contact pressure via a pressure control valve.

Weiterhin weist die in der Figur 1 dargestellte Schaberklingenhaltevorrichtung in der Nähe des Lagerrohres 5 ein erstes Federblech 16 auf, dessen einer Endbereich an der Grundplatte 6 befestigt ist, beispielsweise angeschweißt. Der andere Endbereich des Federbleches 16 stützt sich an der Deckplatte 2 ab. Das Federblech 16 dient unter anderem als Staubschutz, so dass kein Staub in den Schlitz des geschlitzten Vierkantrohre 4 eindringen kann.Furthermore, in the FIG. 1 shown doctor blade holding device in the vicinity of the bearing tube 5, a first spring plate 16, one end of which at the Base plate 6 is fixed, for example, welded. The other end region of the spring plate 16 is supported on the cover plate 2. The spring plate 16 serves inter alia as dust protection, so that no dust can penetrate into the slot of the slotted square tubes 4.

In ihrem von der Schaberklinge 1 entfernt gelegenen Endbereich ist an der Deckplatte 2 mittels einer Schraub- oder Nietverbindung 20 ein zweites Federblech 18 befestigt, das den Bereich zwischen dem Ende der Begrenzungswand 9 der Grundplatte 6 und der Deckplatte 2 überbrückt und sich auf der Außenseite der Begrenzungswand 9 der Grundplatte 6 abstützt. Auch dieses Federblech 18 dient als Staubschutz bzw. Schmutzabdichtung.In their remote from the doctor blade 1 end region a second spring plate 18 is secured to the cover plate 2 by means of a screw or rivet connection 20, which bridges the area between the end of the boundary wall 9 of the base plate 6 and the cover plate 2 and on the outside of the Boundary wall 9 of the base plate 6 is supported. This spring plate 18 also serves as dust protection or dirt seal.

Das Federblech 18 gleitet sowohl bei einer Erhöhung als auch bei einer Erniedrigung des Luftdrucks im Schlauch 14 an der Außenfläche der Begrenzungswand 9 entlang.The spring plate 18 slides both in an increase as well as a decrease in the air pressure in the hose 14 on the outer surface of the boundary wall 9 along.

Um die Schaberklingenhaltevorrichtung zusammen mit verschiedenen, am Markt vorhandenen Schaberhaltersystemen verwenden zu können, ist mit dem Federblech 16 und/oder der Grundplatte 6 eine Adapterleiste 17 fest verbunden, beispielsweise unter Verwendung von Schrauben 21. Diese Adapterleiste 17 ist auf der von der Deckplatte 2 abgelegenen Außenseite des Federbleches 16 bzw. der Grundplatte 6 positioniert.In order to use the doctor blade holding device together with various existing on the market Schaberhaltersystemen, with the spring plate 16 and / or the base plate 6, an adapter bar 17 is firmly connected, for example using screws 21. This adapter bar 17 is on the remote from the cover plate 2 Outside of the spring plate 16 and the base plate 6 is positioned.

In der Figur 1 ist nach alledem eine Schaberklingenhaltevorrichtung gezeigt, bei der die Schwenkebene der Schaberklingenhaltevorrichtung in spezieller Weise ausgebildet und angeordnet ist. Die in der Figur 1 dargestellte Schaberklingenhaltevorrichtung benötigt nur einen Luftschlauch, da das Herbeiführen der Ausgangsstellung der Deckplatte durch die Kraft des Federbleches 16 erfolgt. Vorzugsweise bildet das aus der Grundplatte 6, dem Federblech 18, einem Teil der Deckplatte 2, dem Vierkantrohr 4 und dem Federblech 16 gebildete System eine im wesentlichen staubdichte Einheit.In the FIG. 1 is shown after all a scraper blade holding device, in which the pivoting plane of the doctor blade holding device is formed and arranged in a special way. The in the FIG. 1 Schaberklingenhaltevorrichtung shown requires only an air hose, since the bringing about the starting position of the cover plate is effected by the force of the spring plate 16. Preferably, this forms from the base plate 6, the spring plate 18, a part of the cover plate 2, the square tube. 4 and the spring plate 16 formed a substantially dustproof unit system.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
Schaberklingescraper blade
22
Deckplattecover plate
33
Fingervorrichtungfinger device
3a3a
Schraubescrew
44
geschlitztes Vierkantrohrslotted square tube
55
Lagerrohrbearing tube
66
Grundplattebaseplate
77
KunststoffeinlagePlastic insert
88th
SchaberklingenträgerScraper blade carrier
99
Begrenzungswand der GrundplatteBoundary wall of the base plate
1010
Schraubescrew
1111
Fixierleistecleat
1212
Fixierfederfixing spring
1313
Bohrungdrilling
1414
Luftschlauchair hose
1515
Niete oder Feder an der SchaberklingeRivet or spring on the scraper blade
1616
Federblechspring plate
1717
Adapterleisteadapter strip
1818
Federblechspring plate
1919
Schraubescrew
2020
Schraube oder NieteScrew or rivet
2121
Schraube oder StehbolzenScrew or stud

Claims (10)

  1. Scraper blade holding device comprising a mounting unit (2, 3) into which a scraper blade carrier (8) is inserted, the carrier having in its region, which projects out of the mounting unit, fastening means (10, 11, 12) for a scraper blade, wherein the fastening means comprise a fixing strip (11), characterised in that the fastening means further comprise a fixing spring (12) connected with the fixing strip.
  2. Scraper blade holding device according to claim 1, characterised in that the scraper blade carrier (8) is provided with bores (13) and the fixing strip is connected with the scraper blade carrier (8) by means of screws (10) led through the bores.
  3. Scraper blade holding device according to claim 1, characterised in that the fixing strip is welded to the scraper blade carrier (8).
  4. Scraper blade holding device according to claim 2 or 3, characterised in that the fixing strip (11) is of angular construction.
  5. Scraper blade holding device according to any one of claims 2 to 4, characterised in that the fixing spring (12) is welded to the fixing strip (11).
  6. Scraper blade holding device according to any one of claims 2 to 4, characterised in that the fixing spring forms with the fixing strip an integral component.
  7. Scraper blade holding device according to any one of the preceding claims, characterised in that the scraper blade carrier (8) consists of stainless steel.
  8. Scraper blade holding device according to any one of the preceding claims, characterised in that the scraper blade carrier (8) is of resilient construction.
  9. Scraper blade holding device according to any one of claims 2 to 8, characterised in that the fixing strip (11) consists of stainless steel.
  10. Scraper blade holding device according to any one of claims 2 to 9, characterised in that the fixing spring (12) consists of stainless steel.
EP07727094A 2006-03-25 2007-03-20 Doctor-blade-retaining device with doctor-blade carrier Not-in-force EP2002052B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006013892A DE102006013892B3 (en) 2006-03-25 2006-03-25 Scraper blade holder comprising a receptacle for a blade carrier equipped with a fixing strip comprises a fixing spring attached to the fixing strip
PCT/EP2007/052617 WO2007110353A1 (en) 2006-03-25 2007-03-20 Doctor-blade-retaining device with doctor-blade carrier

Publications (2)

Publication Number Publication Date
EP2002052A1 EP2002052A1 (en) 2008-12-17
EP2002052B1 true EP2002052B1 (en) 2010-05-26

Family

ID=37950187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07727094A Not-in-force EP2002052B1 (en) 2006-03-25 2007-03-20 Doctor-blade-retaining device with doctor-blade carrier

Country Status (6)

Country Link
US (1) US7828937B2 (en)
EP (1) EP2002052B1 (en)
AT (1) ATE469267T1 (en)
CA (1) CA2644918C (en)
DE (2) DE102006013892B3 (en)
WO (1) WO2007110353A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8584403B2 (en) * 2011-01-03 2013-11-19 Calvin A. Frelier Fluid flow channel and scavenger system
JP2024073671A (en) * 2022-09-29 2024-05-30 ヒューレット－パッカード デベロップメント カンパニー エル．ピー． Blade support device having movable blade holder

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE557556C (en) 1927-03-25 1932-08-25 Saeming Eriksen Akre Scrapers for drums and rollers on paper machines, calenders, etc. like
US4367120A (en) * 1980-03-13 1983-01-04 Vickerys Limited Doctor blade mounting assembly
US4665859A (en) * 1985-12-11 1987-05-19 Thermo Electron-Web Systems, Inc. Finger-type doctor blade holder
WO1991018147A1 (en) * 1990-05-15 1991-11-28 Aikawa Iron Works Co., Ltd. Doctor blade supporting structure
GB9208003D0 (en) * 1992-04-10 1992-05-27 Vickerys Ltd A mounting assembly
JP3264798B2 (en) * 1995-07-28 2002-03-11 株式会社ドクター製作所 Doctor device with mobile doctor blade
FI3835U1 (en) * 1998-11-20 1999-03-16 Valmet Corp Load hose intended for use with a paper machine maker or coating device
FI105577B (en) * 1999-02-03 2000-09-15 Valmet Corp Paper machine scraper equipment
US6202252B1 (en) * 1999-06-03 2001-03-20 Valmet Ltd. Doctoring apparatus
WO2004012143A1 (en) 2002-07-30 2004-02-05 Itochu Corporation Image reader and image reading method
DE10251983A1 (en) * 2002-11-08 2004-05-19 Helmut Strauch Doctor blade mounting, to clean roller surfaces in the papermaking and steel industries, has a mounting tube at the base plate to fit into a quadrilateral tube attached to the cover plate

Also Published As

Publication number Publication date
WO2007110353A1 (en) 2007-10-04
DE102006013892B3 (en) 2007-05-10
CA2644918C (en) 2011-03-08
US20090065165A1 (en) 2009-03-12
ATE469267T1 (en) 2010-06-15
EP2002052A1 (en) 2008-12-17
US7828937B2 (en) 2010-11-09
CA2644918A1 (en) 2007-10-04
DE502007003937D1 (en) 2010-07-08

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