EP1956142B1 - Method and device for guiding a web, especially a paper web, from a press section to a drying section - Google Patents
Method and device for guiding a web, especially a paper web, from a press section to a drying section Download PDFInfo
- Publication number
- EP1956142B1 EP1956142B1 EP08150295A EP08150295A EP1956142B1 EP 1956142 B1 EP1956142 B1 EP 1956142B1 EP 08150295 A EP08150295 A EP 08150295A EP 08150295 A EP08150295 A EP 08150295A EP 1956142 B1 EP1956142 B1 EP 1956142B1
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- European Patent Office
- Prior art keywords
- web
- drying cylinder
- removal
- drying
- strip
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- 238000001035 drying Methods 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000003381 stabilizer Substances 0.000 claims description 31
- 230000000087 stabilizing effect Effects 0.000 claims description 20
- 230000009467 reduction Effects 0.000 claims description 8
- 230000009849 deactivation Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0063—Devices for threading a web tail through a paper-making machine
Definitions
- the present invention relates to a method for transferring a material web, in particular a paper web, from a press section to a dryer section, in particular in a paper machine or the like, in which the material web is separated into a strip and a residual web, the residual web is guided away to a drying cylinder serving as a take-off dry cylinder and Initially, only the so separated strip passed through the entire dryer section and then the web is driven wide.
- the present invention relates to a device for producing a material web, in particular a paper web, with a press section, a dryer section and means for transferring the material web from the press section to the dryer section, comprising means for separating the material web into a strip and a residual web and means for carrying away the residual web after serving as a decrease dry cylinder drying cylinder.
- Such a method and such a device are from the document DE 3 328 162 A1 known.
- the material web is transferred according to the following procedure: first, the web is web-width out to the first drying cylinder. Then a strip is cut and this led through the entire drying section. The residual web is led away after the first drying cylinder. If the strip is stabilized on the last drying cylinder of the dryer section, the web is driven wide on the first drying cylinder.
- a disadvantage of this solution is that the first stabilizer must be switched off above the first stabilizing roller following the first drying cylinder for transferring in order to prevent the complete paper web from being transferred. Especially when high performance stabilizers are installed, it is therefore necessary to increase the web tension, namely the amount that can be reduced by the first stabilizer.
- the paper web must be stretched, i. be pulled to build enough tension.
- the maximum elongation i.e., the maximum tension or the maximum speed difference, is limited by the breaking limit of the paper web.
- the invention is therefore based on the object to provide a method and an apparatus of the type mentioned, in which a lower or no increase of the web train is required.
- This object is achieved in the method of the type mentioned in that the removal of the residual web takes place only after the second drying cylinder.
- this object is achieved in a device of the type mentioned above in that the means for carrying away the residual web are arranged after the second drying cylinder.
- the first and optionally further stabilizers remain activated during the transfer can. Since the Ceireduktions free is mainly due to the stabilizers of the first dryer group, in particular the first stabilizer, and these have a share of the said effect of well above 50%, the required increase in the train can be avoided during the transfer or at least significantly reduced.
- the invention is based on the recognition that as a rule the material strip for transfer transfers without any problems at least through the first part of the dryer section can be destroyed and only in the other dryer groups by the duration of the transfer process and the additional elongation.
- the second or even further downstream drying cylinder is used as a take-down dry cylinder.
- the stabilizing device arranged in front of the second drying cylinder remains fully activated during the transfer.
- a high reduction of the web tension can be achieved.
- two or more stabilizing devices remain fully activated in front of the take-down dry cylinder during the transfer, in particular all stabilizers arranged in front of the take-down dry cylinder.
- the train reduction can be increased even further.
- the stabilizing device arranged downstream of the take-off drying cylinder is deactivated or reduced in its performance during transfer of the material web. In order for a Mitüberstall the complete web can be prevented.
- the residual web is carried away before the take-off dry cylinder, the strips of the web formed thereby being transferred to the take-off dry cylinder before deactivation or power reduction of one or more stabilizers in front of the take-down dry cylinder, then the web in full Width led to the take-off dry cylinder, then led away after the take-off dry cylinder, the residual web and the resulting strip of web material passed through the entire dryer section and then drove the web wide.
- a transfer can be ensured even with a low train, even if a Transferring the entire material web to the take-down dry cylinder is not successful.
- the separated residual web of the material web is preferably fed to a pulper or to another waste treatment, it being possible for the pulper or the other waste treatment device to be arranged directly in the region of the removal of the residual web or away from it.
- the supply via a transport device.
- the device according to the invention for producing a material web preferably has transfer aids such as blowpipes and injector fields at the starting points of the web transfer.
- transfer aids such as blowpipes and injector fields at the starting points of the web transfer.
- take-off scrapers are provided on the take-off dry cylinders, the take-off scraper point, viewed in cross-section through the take-down dry cylinder, lying on a straight line passing through the center of the take-down dry cylinder and tangentially contacting the associated stabilizer roll or spaced therefrom.
- the distance is preferably more than 20 mm, more preferably more than 50 mm, in particular more than 100 mm. It has been shown that a good stabilization and railway transfer can be ensured.
- a device for demolition detection of the paper web is arranged between the first and the second drying cylinder, with which a web break can be detected.
- a corresponding control is preferably provided.
- the paper machine shown comprises a following on a last roll 1 a press section single-row dryer section 2 with a plurality of drying cylinders 3 and arranged between successive drying cylinders 3 stabilizer rollers 4.
- the stabilizer rollers 4 are each equipped with a stabilizer 5.
- first drying cylinder 3 1 Before the first drying cylinder 3 1 here not shown in detail means for separating the paper web 6 are provided in a strip and a residual web.
- second drying roller 3 2 After the second drying roller 3 2 means for carrying away the residual web of the full width of the drying cylinders 3 1 and 3 2 and the stabilizer roller 4 1 guided paper web 6 are arranged. These include a removal scraper 7 on the second drying roller 3 2 and other, not shown in detail transfer aids such as blowpipes and Injektorfelder.
- the decrease scraper point ie, the tip 8 of the pickup scraper 7 is located on a straight line I, on the one hand passes through the center 9 of the second drying cylinder 3 2 and on the other hand has a distance a 2 to the lateral surface 10 of the second stabilizer roller 4 2 , which is preferably larger than 20 mm, more preferably greater than 50 mm and in particular greater than 100 mm.
- the associated second stabilizer 5 2 is switched off or at least reduced in their performance. This is done for example by valves or flaps.
- first drying cylinder 3 1 and the second drying cylinder 3 2 Between the first drying cylinder 3 1 and the second drying cylinder 3 2 , means for carrying away a residual web of the paper web 6 are likewise arranged. These also include a picking scraper 11, the tip 12 is located on a straight line II, which passes through the center 13 of the first drying cylinder 3 1 and a distance a 1 from the lateral surface 14 of the first stabilizer roller 4 1 has. Again, this distance is again preferably more than 20 mm, more preferably more than 50 mm and in particular more than 100 mm. Also, the first stabilizer roller 4 1 associated stabilizer 5 1 is designed to be switched off or at least reduced in its performance, which in turn valves or flaps can be used. In addition, not shown here in detail transfer aids such as blowpipes and Injektorfelder are provided.
- a pulper not shown here, or any other waste treatment device or a transport device is arranged to such a device.
- the paper machine coincides with a conventional paper machine.
- a paper web 6 can be transferred from a press section into a dryer section 2, the paper web 6 separated into a leading strip and a residual web being guided in full width to the second drying cylinder 3 2 and only after the second drying cylinder 3 2 is the residual web is led away.
- the AufzhoustMail is then performed with deactivated second stabilizer 5 2 through the entire dryer section 2. If the strip is stabilized on the last drying cylinder, the paper web 6 is driven wide. During this transfer, the first stabilizer 5 1 remains fully activated. As a result, a significant reduction of the train is possible.
- the paper web 6 is cut off at the first drying cylinder 3 1 , ie, the residual web is guided away.
- the transfer strip is then transferred with deactivated first stabilizer 5 1 to the second drying cylinder 3 2 .
- the paper web 6 at the first drying cylinder 3 1 driven wide and there is the above-described Wegmate the residual web on the second drying cylinder 3 2 and deactivated second stabilizer 5 2 , but fully activated first stabilizer 5 first
- a transfer of the paper web 6 is carried out in the same manner. This means that the residual web of the paper web 6 separated into a leader strip and a residual web is led away on the second drying cylinder 3 2 .
- the residual web is discharged into the pulper or other waste treatment device and the strip is performed with deactivated second stabilizer 5 2 starting from the second drying cylinder 3 2 through the rest of the dryer section 2 until the strip is stabilized on the last drying cylinder. Then the paper web 6 is 2 again driven wide at the second drying cylinder. Again, this results in a reduced train.
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- Paper (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren zum Überführen einer Materialbahn, insbesondere Papierbahn, von einer Pressenpartie zu einer Trockenpartie, insbesondere in einer Papiermaschine oder dergleichen, bei welchem die Materialbahn in einen Streifen und eine Restbahn aufgetrennt, die Restbahn nach einem als Abnahmetrockenzylinder dienenden Trockenzylinder weggeführt und zunächst nur der so abgetrennte Streifen durch die gesamte Trockenpartie geführt und dann die Materialbahn breit gefahren wird.The present invention relates to a method for transferring a material web, in particular a paper web, from a press section to a dryer section, in particular in a paper machine or the like, in which the material web is separated into a strip and a residual web, the residual web is guided away to a drying cylinder serving as a take-off dry cylinder and Initially, only the so separated strip passed through the entire dryer section and then the web is driven wide.
Darüber hinaus betrifft die vorliegende Erfindung eine Vorrichtung zur Herstellung einer Materialbahn, insbesondere Papierbahn, mit einer Pressenpartie, einer Trockenpartie und Mitteln zum Überführen der Materialbahn von der Pressenpartie zur Trockenpartie, umfassend Mittel zum Auftrennen der Materialbahn in einen Streifen und eine Restbahn und Mittel zum Wegführen der Restbahn nach einem als Abnahmetrockenzylinder dienenden Trockenzylinder.Moreover, the present invention relates to a device for producing a material web, in particular a paper web, with a press section, a dryer section and means for transferring the material web from the press section to the dryer section, comprising means for separating the material web into a strip and a residual web and means for carrying away the residual web after serving as a decrease dry cylinder drying cylinder.
Ein derartiges Verfahren sowie eine derartige Vorrichtung sind aus dem Dokument
Bei bekannten Verfahren und bekannten Vorrichtungen, insbesondere nach Pressen mit geschlossener Bahnführung und Anfangsgruppen mit mehr als einem Trockenzylinder, wird die Materialbahn nach folgendem Vorgehen überführt: zunächst wird die Bahn bahnbreit bis zum ersten Trockenzylinder geführt. Danach wird ein Streifen geschnitten und dieser durch die gesamte Trockenpartie geführt. Die Restbahn wird nach dem ersten Trockenzylinder weggeführt. Ist der Streifen am letzten Trockenzylinder der Trockenpartie stabilisiert, wird die Bahn am ersten Trockenzylinder breit gefahren.In known methods and known devices, in particular after pressing with closed web guide and starting groups with more than one drying cylinder, the material web is transferred according to the following procedure: first, the web is web-width out to the first drying cylinder. Then a strip is cut and this led through the entire drying section. The residual web is led away after the first drying cylinder. If the strip is stabilized on the last drying cylinder of the dryer section, the web is driven wide on the first drying cylinder.
Nachteil dieser Lösung ist, dass der erste Stabilisator über der auf den ersten Trockenzylinder folgenden ersten Stabilisatorwalze zum Überführen ausgeschaltet sein muss um zu verhindern, dass die komplette Papierbahn überführt wird. Insbesondere wenn Hochleistungsstabilisatoren installiert sind, ist es daher notwendig, den Bahnzug zu erhöhen, nämlich um den Betrag, der durch den ersten Stabilisator reduziert werden kann.A disadvantage of this solution is that the first stabilizer must be switched off above the first stabilizing roller following the first drying cylinder for transferring in order to prevent the complete paper web from being transferred. Especially when high performance stabilizers are installed, it is therefore necessary to increase the web tension, namely the amount that can be reduced by the first stabilizer.
Um die Papierbahn durch die Papiermaschine führen zu können, muss die Papierbahn nämlich gedehnt, d.h. gezogen werden, um genügend Spannung aufzubauen. Die maximale Dehnung, d.h., der maximale Zug bzw. die maximale Geschwindigkeitsdifferenz, ist jedoch durch die Bruchgrenze der Papierbahn limitiert. Durch die Installation von Hochleistungsstabilisatoren kann dieser Zug während dem Betrieb deutlich reduziert werden.In fact, to be able to guide the paper web through the paper machine, the paper web must be stretched, i. be pulled to build enough tension. However, the maximum elongation, i.e., the maximum tension or the maximum speed difference, is limited by the breaking limit of the paper web. By installing high-performance stabilizers, this train can be significantly reduced during operation.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung der eingangs genannten Art anzugeben, bei denen eine geringere oder keine Erhöhung des Bahnzugs erforderlich ist.The invention is therefore based on the object to provide a method and an apparatus of the type mentioned, in which a lower or no increase of the web train is required.
Diese Aufgabe wird bei dem Verfahren der eingangs genannten Art dadurch gelöst, dass das Wegführen der Restbahn erst nach dem zweiten Trockenzylinder erfolgt.This object is achieved in the method of the type mentioned in that the removal of the residual web takes place only after the second drying cylinder.
Darüber hinaus wird diese Aufgabe bei einer Vorrichtung der eingangs genannten Art dadurch gelöst, dass die Mittel zum Wegführen der Restbahn nach dem zweiten Trockenzylinder angeordnet sind.In addition, this object is achieved in a device of the type mentioned above in that the means for carrying away the residual web are arranged after the second drying cylinder.
Durch das Wegführen der Restbahn erst nach dem zweiten Trockenzylinder, wobei das Wegführen zwischen dem zweiten und dem dritten Trockenzylinder oder auch erst nach dem dritten oder einem späteren Trockenzylinder erfolgen kann, wird vorteilhafterweise erreicht, dass der erste und gegebenenfalls weitere Stabilisatoren während der Überführung aktiviert bleiben können. Da der Zugreduktionseffekt maßgeblich auf die Stabilisatoren der ersten Trockengruppe, insbesondere den ersten Stabilisator, zurückzuführen ist und diese einen Anteil an dem genannten Effekt von deutlich über 50 % aufweisen, kann die erforderliche Zugerhöhung beim Überführen vermieden oder zumindest deutlich reduziert werden. Die Erfindung beruht dabei auf der Erkenntnis, dass im Regelfall der Materialstreifen zur Überführung problemlos zumindest durch den ersten Teil der Trockenpartie überführt werden kann und erst in den weiteren Trockengruppen durch die Dauer des Überführprozesses und die zusätzliche Dehnung zerstört wird. Als Abnahmetrockenzylinder dient erfindungsgemäß also der zweite oder ein noch weiter hinten angeordneter Trockenzylinder.By the removal of the residual web only after the second drying cylinder, wherein the removal can take place between the second and the third drying cylinder or after the third or a later drying cylinder, it is advantageously achieved that the first and optionally further stabilizers remain activated during the transfer can. Since the Zugreduktionseffekt is mainly due to the stabilizers of the first dryer group, in particular the first stabilizer, and these have a share of the said effect of well above 50%, the required increase in the train can be avoided during the transfer or at least significantly reduced. The invention is based on the recognition that as a rule the material strip for transfer transfers without any problems at least through the first part of the dryer section can be destroyed and only in the other dryer groups by the duration of the transfer process and the additional elongation. Thus, according to the invention, the second or even further downstream drying cylinder is used as a take-down dry cylinder.
Bevorzugt bleibt die vor dem zweiten Trockenzylinder angeordnete Stabilisierungseinrichtung während des Überführens voll aktiviert. Dadurch kann eine hohe Reduzierung des Bahnzuges erreicht werden.Preferably, the stabilizing device arranged in front of the second drying cylinder remains fully activated during the transfer. As a result, a high reduction of the web tension can be achieved.
Erfolgt das Wegführen der Restbahn erst nach dem dritten oder einem späteren Trockenzylinder, so bleiben nach einer weiteren Ausgestaltung der Erfindung zwei oder mehr Stabilisiereinrichtungen vor dem Abnahmetrockenzylinder während der Überführung voll aktiviert, insbesondere alle vor dem Abnahmetrockenzylinder angeordneten Stabilisiereinrichtungen. Damit kann die Zugreduktion noch weiter erhöht werden.If the removal of the residual web takes place only after the third or a later drying cylinder, according to a further embodiment of the invention, two or more stabilizing devices remain fully activated in front of the take-down dry cylinder during the transfer, in particular all stabilizers arranged in front of the take-down dry cylinder. Thus, the train reduction can be increased even further.
Nach einer weiteren Ausgestaltung der Erfindung wird die nach dem Abnahmetrockenzylinder angeordnete Stabilisiereinrichtung beim Überführen der Materialbahn deaktiviert oder in ihrer Leistung reduziert. Damit kann ein Mitüberführen der kompletten Materialbahn verhindert werden.According to a further embodiment of the invention, the stabilizing device arranged downstream of the take-off drying cylinder is deactivated or reduced in its performance during transfer of the material web. In order for a Mitüberführen the complete web can be prevented.
Nach einer Ausgestaltung der Erfindung wird bei erfolglosem Überführen der Materialbahn bis zum Abnahmetrockenzylinder ein Wegführen der Restbahn vor dem Abnahmetrockenzylinder durchgeführt, der dabei gebildete Streifen der Materialbahn unter Deaktivierung oder Leistungsreduzierung einer oder mehrerer Stabilisiereinrichtungen vor dem Abnahmetrockenzylinder auf den Abnahmetrockenzylinder überführt, dann die Materialbahn in voller Breite zum Abnahmetrockenzylinder geführt, danach nach dem Abnahmetrockenzylinder die Restbahn weggeführt und der dabei gebildete Streifen der Materialbahn durch die gesamte Trockenpartie geführt und dann die Materialbahn breit gefahren. Damit kann ein Überführen mit geringem Bahnzug auch dann gewährleistet werden, wenn ein Überführen der gesamten Materialbahn bis zum Abnahmetrockenzylinder nicht erfolgreich ist.According to one embodiment of the invention, in the case of unsuccessful transfer of the material web to the take-off dry cylinder, the residual web is carried away before the take-off dry cylinder, the strips of the web formed thereby being transferred to the take-off dry cylinder before deactivation or power reduction of one or more stabilizers in front of the take-down dry cylinder, then the web in full Width led to the take-off dry cylinder, then led away after the take-off dry cylinder, the residual web and the resulting strip of web material passed through the entire dryer section and then drove the web wide. Thus, a transfer can be ensured even with a low train, even if a Transferring the entire material web to the take-down dry cylinder is not successful.
Im Falle eines Abrisses der Materialbahn in der Trockenpartie nach dem Abnahmetrockenzylinder wird bevorzugt ein Wegführen der Restbahn nach dem Abnahmetrockenzylinder und von dort wieder ein Überführen des dabei abgetrennten Streifens unter Deaktivierung oder Leistungsreduzierung der auf den Abnahmetrockenzylinder folgenden Stabilisiereinrichtung und bevorzugt unter voller Aktivierung einer oder mehrerer Stabilisiereinrichtungen vor dem Abnahmetrockenzylinder durchgeführt und dann die Bahn breit gefahren. Dies hat den Vorteil, dass die kritischste Stelle direkt zu Beginn der Trockenpartie überbrückt ist. Dabei ist festzustellen, dass in der Regel mehr als 80 % der Abrisse nach dem Abnahmetrockenzylinder auftreten.In the case of a tear-off of the material web in the dryer section after the take-off dry cylinder, it is preferred to carry away the residual web after the take-off dry cylinder and from there again transfer the strip separated thereby, with deactivation or power reduction of the stabilizer following the take-down dry cylinder, and preferably with full activation of one or more stabilizers before the take-off dry cylinder and then drove the web wide. This has the advantage that the most critical point is bridged directly at the beginning of the dryer section. It should be noted that as a rule more than 80% of the breaks occur after the take-off dry cylinder.
Die abgetrennte Restbahn der Materialbahn wird bevorzugt einem Pulper oder einer sonstigen Ausschussbehandlung zugeführt, wobei der Pulper oder die sonstige Ausschussbehandlungseinrichtung direkt im Bereich der Wegführung der Restbahn oder entfernt hiervon angeordnet sein kann. Im zweiten Fall erfolgt die Zufuhr über eine Transporteinrichtung.The separated residual web of the material web is preferably fed to a pulper or to another waste treatment, it being possible for the pulper or the other waste treatment device to be arranged directly in the region of the removal of the residual web or away from it. In the second case, the supply via a transport device.
Die erfindungsgemäße Vorrichtung zur Herstellung einer Materialbahn, insbesondere Papierbahn, weist bevorzugt Überführhilfsmittel wie Blasrohre und Injektorfelder an den Ausgangspunkten der Bahnüberführung auf. Damit kann die Überführung weiter verbessert werden.The device according to the invention for producing a material web, in particular a paper web, preferably has transfer aids such as blowpipes and injector fields at the starting points of the web transfer. Thus, the transfer can be further improved.
Ebenfalls bevorzugt sind an den Abnahmetrockenzylindern Abnahmeschaber vorgesehen, wobei der Abnahmeschaberpunkt im Querschnitt durch den Abnahmetrockenzylinder betrachtet auf einer Geraden liegt, die durch den Mittelpunkt des Abnahmetrockenzylinders geht und die zugeordnete Stabilisatorwalze tangential berührt oder von deren Oberfläche einen Abstand aufweist. Der Abstand beträgt bevorzugt mehr als 20 mm, weiter bevorzugt mehr als 50 mm, insbesondere mehr als 100 mm. Es hat sich gezeigt, dass damit eine gute Stabilisierung und Bahnüberführung gewährleistet werden kann.Also preferably, take-off scrapers are provided on the take-off dry cylinders, the take-off scraper point, viewed in cross-section through the take-down dry cylinder, lying on a straight line passing through the center of the take-down dry cylinder and tangentially contacting the associated stabilizer roll or spaced therefrom. The distance is preferably more than 20 mm, more preferably more than 50 mm, in particular more than 100 mm. It has been shown that a good stabilization and railway transfer can be ensured.
Vorzugsweise ist zwischen dem ersten und dem zweiten Trockenzylinder eine Vorrichtung zur Abrisserkennung der Papierbahn angeordnet, mit welcher ein Bahnabriss detektiert werden kann.Preferably, a device for demolition detection of the paper web is arranged between the first and the second drying cylinder, with which a web break can be detected.
Zur Abschaltung und/oder Leistungsreduzierung der Stabilisiereinrichtungen ist bevorzugt eine entsprechende Steuerung vorgesehen.For switching off and / or power reduction of the stabilizers, a corresponding control is preferably provided.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend beschrieben. Es zeigt als einzige Figur
- Fig. 1
- einen Querschnitt durch einen Teil der Trockenpartie einer erfindungsgemäßen Papiermaschine.
- Fig. 1
- a cross-section through part of the dryer section of a paper machine according to the invention.
Die dargestellte Papiermaschine umfasst eine auf eine letzte Walze 1 einer Pressenpartie folgende einreihige Trockenpartie 2 mit mehreren Trockenzylindern 3 und zwischen aufeinander folgenden Trockenzylindern 3 angeordneten Stabilisatorwalzen 4. Die Stabilisatorwalzen 4 sind dabei jeweils mit einer Stabilisiereinrichtung 5 ausgerüstet.The paper machine shown comprises a following on a last roll 1 a press section single-
Vor dem ersten Trockenzylinder 31 sind hier nicht im einzelnen dargestellte Mittel zum Auftrennen der Papierbahn 6 in einen Streifen und eine Restbahn vorgesehen. Nach der zweiten Trockenwalze 32 sind Mittel zum Wegführen der Restbahn der in voller Breite über die Trockenzylinder 31 und 32 und die Stabilisatorwalze 41 geführten Papierbahn 6 angeordnet. Diese umfassen einen Abnahmeschaber 7 an der zweiten Trockenwalze 32 sowie weitere, nicht im einzelnen dargestellte Überführhilfsmittel wie Blasrohre und Injektorfelder. Der Abnahmeschaberpunkt, d.h., die Spitze 8 des Abnahmeschabers 7 liegt auf einer Geraden I, die einerseits durch den Mittelpunkt 9 des zweiten Trockenzylinders 32 geht und andererseits einen Abstand a2 zur Mantelfläche 10 der zweiten Stabilisatorwalze 42 aufweist, der bevorzugt größer ist als 20 mm, weiter bevorzugt größer als 50 mm und insbesondere größer als 100 mm. Die zugehörige zweite Stabilisiereinrichtung 52 ist abschaltbar oder zumindest in ihrer Leistung reduzierbar. Dies erfolgt beispielsweise durch Ventile oder Klappen.Before the first drying cylinder 3 1 here not shown in detail means for separating the paper web 6 are provided in a strip and a residual web. After the second drying roller 3 2 means for carrying away the residual web of the full width of the drying cylinders 3 1 and 3 2 and the stabilizer roller 4 1 guided paper web 6 are arranged. These include a removal scraper 7 on the second drying roller 3 2 and other, not shown in detail transfer aids such as blowpipes and Injektorfelder. The decrease scraper point, ie, the tip 8 of the pickup scraper 7 is located on a straight line I, on the one hand passes through the center 9 of the second drying cylinder 3 2 and on the other hand has a distance a 2 to the lateral surface 10 of the second stabilizer roller 4 2 , which is preferably larger than 20 mm, more preferably greater than 50 mm and in particular greater than 100 mm. The associated second stabilizer 5 2 is switched off or at least reduced in their performance. This is done for example by valves or flaps.
Zwischen dem ersten Trockenzylinder 31 und dem zweiten Trockenzylinder 32 sind ebenfalls Mittel zum Wegführen einer Restbahn der Papierbahn 6 angeordnet. Diese umfassen ebenfalls einen Abnahmeschaber 11, dessen Spitze 12 auf einer Geraden II liegt, die durch den Mittelpunkt 13 des ersten Trockenzylinders 31 geht und einen Abstand a1 von der Mantelfläche 14 der ersten Stabilisatorwalze 41 aufweist. Auch dieser Abstand beträgt wiederum bevorzugt mehr als 20 mm, weiter bevorzugt mehr als 50 mm und insbesondere mehr als 100 mm. Auch der der ersten Stabilisatorwalze 41 zugeordnete Stabilisator 51 ist abschaltbar ausgebildet oder zumindest in seiner Leistung reduzierbar, wofür wiederum Ventile oder Klappen verwendet werden können. Darüber hinaus sind auch hier im Einzelnen nicht dargestellte Überführhilfsmittel wie Blasrohre und Injektorfelder vorgesehen.Between the first drying cylinder 3 1 and the second drying cylinder 3 2 , means for carrying away a residual web of the paper web 6 are likewise arranged. These also include a picking scraper 11, the tip 12 is located on a straight line II, which passes through the center 13 of the first drying cylinder 3 1 and a distance a 1 from the lateral surface 14 of the first stabilizer roller 4 1 has. Again, this distance is again preferably more than 20 mm, more preferably more than 50 mm and in particular more than 100 mm. Also, the first stabilizer roller 4 1 associated stabilizer 5 1 is designed to be switched off or at least reduced in its performance, which in turn valves or flaps can be used. In addition, not shown here in detail transfer aids such as blowpipes and Injektorfelder are provided.
Unterhalb der beiden Wegführbereiche bei den beiden Abnahmeschabern 7 und 11 ist ein hier nicht dargestellter Pulper oder eine sonstige Ausschussbehandlungseinrichtung oder eine Transporteinrichtung zu einer solchen Einrichtung angeordnet. Im übrigen stimmt die Papiermaschine mit einer herkömmlichen Papiermaschine überein.Below the two Wegführbereiche in the two acceptance scrapers 7 and 11, a pulper, not shown here, or any other waste treatment device or a transport device is arranged to such a device. For the rest, the paper machine coincides with a conventional paper machine.
Mit der dargestellten Papiermaschine kann eine Papierbahn 6 von einer Pressenpartie in eine Trockenpartie 2 überführt werden, wobei die in einen Aufführstreifen und eine Restbahn aufgetrennte Papierbahn 6 in voller Breite bis auf den zweiten Trockenzylinder 32 geführt und erst nach dem zweiten Trockenzylinder 32 die Restbahn weggeführt wird. Der Aufführstreifen wird bei deaktiviertem zweiten Stabilisator 52 sodann durch die gesamte Trockenpartie 2 geführt. Ist der Streifen am letzten Trockenzylinder stabilisiert, wird die Papierbahn 6 breit gefahren. Während dieser Überführung bleibt der erste Stabilisator 51 voll aktiviert. Dadurch ist eine erhebliche Reduzierung des Bahnzugs möglich.With the illustrated paper machine, a paper web 6 can be transferred from a press section into a
Ist das beschriebene Überführen der Papierbahn 6 bis zum zweiten Trockenzylinder 32 nicht erfolgreich, so wird die Papierbahn 6 am ersten Trockenzylinder 31 abgeschlagen, d.h., die Restbahn weggeführt. Der Überführstreifen wird dann bei deaktiviertem ersten Stabilisator 51 bis auf den zweiten Trockenzylinder 32 überführt. Dann wird die Papierbahn 6 am ersten Trockenzylinder 31 breit gefahren und es erfolgt das oben beschriebene Wegführen der Restbahn am zweiten Trockenzylinder 32 und deaktiviertem zweiten Stabilisator 52, aber voll aktiviertem ersten Stabilisator 51.If the described transfer of the paper web 6 to the second drying cylinder 3 2 is unsuccessful, then the paper web 6 is cut off at the first drying cylinder 3 1 , ie, the residual web is guided away. The transfer strip is then transferred with deactivated first stabilizer 5 1 to the second drying cylinder 3 2 . Then, the paper web 6 at the first drying cylinder 3 1 driven wide and there is the above-described Wegführen the residual web on the second drying cylinder 3 2 and deactivated second stabilizer 5 2 , but fully activated first stabilizer 5 first
Erfolgt ein Bahnabriss nach dem zweiten Trockenzylinder 32, so wird ein Überführen der Papierbahn 6 in derselben Weise durchgeführt. Das heißt, die Restbahn der in einen Aufführstreifen und eine Restbahn aufgetrennten Papierbahn 6 wird am zweiten Trockenzylinder 32 weggeführt. Die Restbahn wird in den Pulper oder eine sonstige Ausschussbehandlungseinrichtung abgeführt und der Streifen wird bei deaktiviertem zweiten Stabilisator 52 ausgehend vom zweiten Trockenzylinder 32 durch den Rest der Trockenpartie 2 geführt, bis der Streifen am letzten Trockenzylinder stabilisiert ist. Dann wird die Papierbahn 6 am zweiten Trockenzylinder 32 wieder breit gefahren. Auch hier ergibt sich ein reduzierter Bahnzug.If a web break after the second drying cylinder 3 2 , a transfer of the paper web 6 is carried out in the same manner. This means that the residual web of the paper web 6 separated into a leader strip and a residual web is led away on the second drying cylinder 3 2 . The residual web is discharged into the pulper or other waste treatment device and the strip is performed with deactivated second stabilizer 5 2 starting from the second drying cylinder 3 2 through the rest of the
- 11
- Presswalzepress roll
- 22
- Trockenpartiedrying section
- 31 bis 33 3 1 to 3 3
- Trockenzylinderdrying cylinders
- 41, 42 4 1 , 4 2
- Stabilisatorwalzestabilizer roller
- 51, 52 5 1 , 5 2
- Stabilisiereinrichtungstabilizing
- 66
- Papierbahnpaper web
- 77
- AbnahmeschaberBut decreased Esch
- 88th
- AbnahmeschaberspitzeDecreased Esch But top
- 99
- Mittelpunkt von 32 Midpoint of 3 2
- 1010
- Mantel von 42 Coat of 4 2
- 1111
- AbnahmeschaberBut decreased Esch
- 1212
- AbnahmeschaberspitzeDecreased Esch But top
- 1313
- Mittelpunkt von 31 Midpoint of 3 1
- 1414
- Mantelfläche von 41 Lateral surface of 4 1
- II
- GeradeJust
- IIII
- GeradeJust
- a1 a 1
- Abstanddistance
- a2 a 2
- Abstanddistance
Claims (25)
- Method for transferring a web, especially a paper web (6), from a press section to a drying section (2), especially in a paper machine or the like, in which the web (6) is divided into a strip and a remaining web, the remaining web is led away after a drying cylinder (32) used as a removal drying cylinder, and initially only the strip severed in this way is led through the entire drying section (2) and the web (6) is then widened,
characterized in that
the remaining web is led away only after the second drying cylinder (32). - Method according to Claim 1,
characterized in that
the web is led away between the second drying cylinder (32) and the third drying cylinder (33) . - Method according to Claim 1 or 2,
characterized in that
before the second drying cylinder (32) there is arranged a stabilizing device (51), and in that this stabilizing device (51) remains fully activated during the transfer. - Method according to Claim 1,
characterized in that
there are two or more drying cylinders present before the removal drying cylinder, each of which has a stabilizing device, and in that two or more of these stabilizing devices remain fully activated during the transfer. - Method according to one of the preceding claims,
characterized in that
the removal drying cylinder (32) is followed by a stabilizing device (52), and in that this stabilizing device (52) is deactivated or the performance thereof is reduced during the transfer of the web (6). - Method according to one of the preceding claims,
characterized in that
in the event of an unsuccessful transfer of the full web (6) to the removal drying cylinder (32), the remaining web is led away after a drying cylinder (31) arranged before the removal drying cylinder (32), the strip of the web (6) severed in the process is transferred to the removal drying cylinder (32) with the deactivation or reduction in performance of one or more stabilizing devices (51) before the removal drying cylinder (32), the web (6) is then led at full width to the removal drying cylinder (32), after that the remaining web is led away after the removal drying cylinder (32) and the strip of the web (6) formed in the process is led through the entire drying section (2) and the web (6) is then widened. - Method according to one of the preceding claims,
characterized in that
in the event of a break in the web (6) in the drying section (2) after the removal drying cylinder (32), the remaining web is led away after the removal drying cylinder (2) and from there once more a transfer of the strip severed in the process is carried out with deactivation or reduction in performance of the stabilizing device (52) following the removal drying cylinder (32) and preferably full activation of one or more stabilizing devices (51) before the removal drying cylinder (32), and the web (6) is then widened. - Method according to one of the preceding claims,
characterized in that
the remaining web is fed to a pulper or other broke treatment. - Method according to one of the preceding claims,
characterized in that
the paper web (6) is already divided into a threading strip and a remaining web before the first drying cylinder (31). - Apparatus for producing a web, especially a paper web (6), having a press section, a drying section (2) and means for transferring the web (6) from the press section to the drying section (2), comprising means (7) for dividing the web (6) into a strip and a remaining web and means for leading the remaining web away after a drying cylinder (32) serving as a removal drying cylinder,
characterized in that
the means (7) for leading the remaining web away are arranged after the second drying cylinder (32). - Apparatus according to Claim 10,
characterized in that
the means (7) for leading the remaining web away are arranged between the second drying cylinder (32) and the third drying cylinder (33). - Apparatus according to Claim 10 or 11,
characterized in that
the first drying cylinder (31) has a stabilizing device (51). - Apparatus according to Claim 12,
characterized in that
the stabilizing device (51) can be switched off and/or the performance thereof can be reduced. - Apparatus according to Claim 10,
characterized in that
there are two or more drying cylinders present before the removal drying cylinder and each has a stabilizing device. - Apparatus according to Claim 14,
characterized in that
two or more of these stabilizing devices can be switched off and/or the performance thereof can be reduced. - Apparatus according to one of Claims 10 to 15,
characterized in that
after the removal drying cylinder (32) there is arranged a stabilizing device (52) which can be switched off and/or of which the performance can be reduced. - Apparatus according to one of Claims 10 to 16,
characterized in that
in addition, after a drying cylinder (31) arranged before the removal drying cylinder (32), means (11) for leading the remaining web away are likewise present. - Apparatus according to one of Claims 10 to 17,
characterized in that
at the point at which the web is led away, a pulper, another broke handling device or a transport device to such a device is provided. - Apparatus according to one of Claims 10 to 18,
characterized in that
transfer means such as blower pipes and injector matrices are provided at the output points from the web transfer. - Apparatus according to one of Claims 10 to 19,
characterized in that
removal ductors (7, 11) are provided on the removal drying cylinders (31, 32). - Apparatus according to Claim 20,
characterized in that
viewed in cross section through the removal drying cylinder (31, 32), the removal ductor point lies on a straight line (I, II) which goes through the centre (9, 13) of the removal drying cylinder (31, 32) and touches the associated stabilizer roll (41, 42) tangentially or is at a distance (a1, a2) from the circumferential surface (10, 14) of the latter. - Apparatus according to Claim 21,
characterized in that
the distance (a1, a2) is greater then 20 mm, preferably greater than 50 mm, especially greater than 100 mm. - Apparatus according to one of Claims 10 to 22,
characterized in that
a stabilizer controller is provided, by means of which the stabilizing device or devices (51, 52) can be switched off and/or the performance thereof can be reduced. - Apparatus according to one of Claims 10 to 23,
characterized in that
the means for dividing the paper web (6) into a threading strip and a remaining web are arranged before the first drying cylinder (31). - Apparatus according to one of Claims 10 to 24,
characterized in that
between the first drying cylinder (31) and the second drying cylinder (32) there is arranged a break detecting device.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007007173A DE102007007173A1 (en) | 2007-02-09 | 2007-02-09 | Method and device for transferring a material web, in particular a paper web, from a press section to a dryer section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1956142A1 EP1956142A1 (en) | 2008-08-13 |
| EP1956142B1 true EP1956142B1 (en) | 2010-09-15 |
Family
ID=39156358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08150295A Not-in-force EP1956142B1 (en) | 2007-02-09 | 2008-01-16 | Method and device for guiding a web, especially a paper web, from a press section to a drying section |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1956142B1 (en) |
| CN (1) | CN101240513B (en) |
| AT (1) | ATE481530T1 (en) |
| DE (2) | DE102007007173A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016209780A1 (en) * | 2016-06-03 | 2017-12-07 | Voith Patent Gmbh | press section |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3328162C2 (en) * | 1983-08-04 | 1986-02-20 | J.M. Voith Gmbh, 7920 Heidenheim | Paper machine |
| SE502817C2 (en) * | 1994-07-04 | 1996-01-22 | Flaekt Ab | Device adapted to reduce the effects of a paper web's tendency to adhere to a drying cylinder in a paper machine |
| DE10016492A1 (en) * | 2000-04-01 | 2001-10-11 | Voith Paper Patent Gmbh | Laxative |
-
2007
- 2007-02-09 DE DE102007007173A patent/DE102007007173A1/en not_active Withdrawn
-
2008
- 2008-01-16 DE DE502008001276T patent/DE502008001276D1/en active Active
- 2008-01-16 EP EP08150295A patent/EP1956142B1/en not_active Not-in-force
- 2008-01-16 AT AT08150295T patent/ATE481530T1/en active
- 2008-02-05 CN CN2008100856810A patent/CN101240513B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101240513A (en) | 2008-08-13 |
| ATE481530T1 (en) | 2010-10-15 |
| DE502008001276D1 (en) | 2010-10-28 |
| EP1956142A1 (en) | 2008-08-13 |
| CN101240513B (en) | 2012-05-02 |
| DE102007007173A1 (en) | 2008-08-14 |
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