WO2013068442A1 - Dispositif et procédé de conditionnement d'un rouleau - Google Patents

Dispositif et procédé de conditionnement d'un rouleau Download PDF

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Publication number
WO2013068442A1
WO2013068442A1 PCT/EP2012/072102 EP2012072102W WO2013068442A1 WO 2013068442 A1 WO2013068442 A1 WO 2013068442A1 EP 2012072102 W EP2012072102 W EP 2012072102W WO 2013068442 A1 WO2013068442 A1 WO 2013068442A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
unit
contamination
sensor unit
roll
Prior art date
Application number
PCT/EP2012/072102
Other languages
German (de)
English (en)
Inventor
Juergen Abraham
Oliver Kaufmann
Marc Erkelenz
Alexander Etschmaier
Original Assignee
Voith Patent Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Patent Gmbh filed Critical Voith Patent Gmbh
Publication of WO2013068442A1 publication Critical patent/WO2013068442A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G3/00—Doctors
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0009—Paper-making control systems
    • D21G9/0045—Paper-making control systems controlling the calendering or finishing

Definitions

  • the invention relates to a device for conditioning a roller, in particular in a web-making, -processing and / or -veredelnden machine such as a paper, board, tissue or foil machine according to the preamble of claim 1 and a method for Beschabtation according to the preamble of claim 6th
  • rollers for stabilizing, guiding and further transporting the web and for guiding the web supporting elements such as clothing are provided.
  • unwanted accumulation of particles on the rollers include, for example, agglomerations of fibers and additives from stock preparation, adhesive impurities from waste paper processing or coating residue when applying lines on the fibrous web.
  • the agglomerations are referred to as pitch, stickies and white pitch. The following is a simplified discussion of impurity accumulation, as far as specific problems of the individual subgroups are not addressed.
  • a disadvantage of the devices and measures known from the cited prior art is, for example, that the Beschabtation usually takes place permanently and thus draws a high energy demand by friction by itself.
  • WO 02/20901 A1 discloses a method and a device for cleaning and servicing rolls in a calender. The method is to monitor the web surface and to detect and locate contamination of the surface of rolls by a soil sensor. A cleaning device then removes the contaminants. It is provided that a cleaning liquid is sprayed on.
  • a disadvantage of this known prior art is that a rewetting of the fibrous web is to be expected by the cleaning liquid.
  • extensive equipment is required, which makes cleaning expensive and equipment side expensive. It is accordingly an object of the invention to provide an apparatus and a method for needs-based conditioning, in particular Beschabtation of rollers, the Beschabtation is automatically triggered and reset depending on the state of contamination in a simple and cost-effective manner, without requiring control by personnel.
  • At least a part of a surface of the roller is designed so that the surface can be detected by means of the at least one sensor unit and that the degree of contamination by a contrast between clean and dirty surface portions and / or pattern recognition and / or image recognition means the evaluation unit is recognizable and assessable.
  • At least one scraper unit is provided for conditioning, which is arranged in the region of the roller such that upon detection of the exceeding of a threshold value of contamination the at least one scraper unit can be controlled by the evaluation unit and brought into tribological contact with the surface of the roller.
  • Scrapers are the most reliable and easiest way to clean rotating surfaces and are superior to liquid cleaning because of easier handling and lower costs.
  • the surface of the roller may at least partially consist of a UV-fluorescent material or a mixture of materials with UV-fluorescent particles or be provided with a coating comprising UV-fluorescent material or a mixture of materials with UV-fluorescent particles.
  • a UV light source through which the surface can be illuminated with UV light and thus forming the at least one sensor unit as an image camera, line scan camera, UV camera and / or UV sensor, contaminations can be reliably detected without impairing the functionality of the roll
  • the surface of the roller can be configured to be heat-loadable and the degree of contamination can be measured by the at least one sensor unit based on the detection of warmer and colder areas. This can be implemented, for example, in the area of the drying group of a paper machine in a simple manner, since the drying cylinders must anyway be heated in order to be able to fulfill their function.
  • the at least one scraper unit is preferably brought into contact with the surface of the roller and swiveled down again when it falls below a second threshold value.
  • the second threshold value can be smaller than the first threshold value. In the optimal case, this achieves a complete cleaning of the roll surface with a contamination value of approximately 0%.
  • Fig. 1 is a highly schematic representation of an exemplary inventively designed device for Beschabtation a
  • Fig. 2 is a highly schematic representation of another embodiment of an inventively designed device.
  • a device 1 for Beschabtation a roller 2 is shown in a highly schematic representation in perspective view.
  • the device 1 essentially comprises at least one sensor unit 3, which is arranged at a suitable location in the region of the roller 2 to be doctored.
  • the at least one sensor unit 3 is preferably approximately as long as the axial length of the roller 2, but may also be shorter if the sensor unit 3 has a corresponding geometry. However, it should at least be designed so that the working width of a fabric not shown in Fig. 1 is completely detectable.
  • the at least one sensor unit 3 may be integrally formed or composed of individual sensor elements.
  • the latter embodiment is particularly advantageous since the sensor unit 3 can be flexibly adapted to deviating roll lengths by fitting or removing sensor elements.
  • the at least one sensor unit 3 is connected in the illustrated embodiment via cable 4 to an evaluation unit 5, which is designed to record the data collected by the at least one sensor unit 3 and to drive at least one likewise connected via cable 7 scraper unit 6. Also wireless transmission paths such as wireless or wireless connection to the evaluation unit 5 are conceivable and executable. Such detection and AnSteuerüen and their connections with sensors are well known in the prior art, which is why a detailed description can be omitted here.
  • impurity accumulations 8 On the surface of the roll 2 to be shredded, by way of example, some impurity accumulations 8 are shown which adhere to the surface.
  • the impurities accumulations 8 are usually not so isolated, as shown for reasons of clarity in Fig. 1, but can cover the surface of the roller 2 up to 100%.
  • the roller 2 is provided with a coating which, according to one exemplary embodiment, can be activated by incident light of suitable wavelength.
  • the coating may, for example, contain particles which fluoresce when exposed to UV light.
  • the at least one sensor unit 3 can record the resulting contrast differences over one or more revolutions of the roller 2, and subsequently both a degree of contamination can be determined and a contamination map of the surface of the roller 2 can be created. If a specific threshold value, which can be, for example, a percentage of covered roll surface or even as a percentage of an image detail of the sensor unit 3 and is freely selectable, the evaluation unit 5 directs the application of the at least one scraper unit 6 in tribological contact to the roller 2 and the Conditioning the surface.
  • the at least one sensor unit 3 further measures the contrast differences, so that the undershooting of a further threshold value, preferably different from the first, can also be detected by the cleaning and the at least one scraper unit 6 can be swiveled away from the roller 2 again.
  • a further threshold value preferably different from the first
  • the second threshold which indicates the degree of cleanliness of the roll 2
  • the roller is most thoroughly conditioned to achieve the cleanest surface possible. If it is not necessary to completely clean the surface, any other threshold value can also be selected, for example, to drive only very short conditioning times with the lowest possible energy requirement.
  • the device 1 according to the invention is also distinguished by a series of further advantages which can contribute to the effectiveness of the production. It is thus possible to use the data recorded by the evaluation unit 5 for the online monitoring of the contamination of one or more rollers 2 of a section of a web-processing machine and from this statistical evaluation options on the temporal and local course of the construction of impurities on rollers 2 in certain To open positions or sections of a web-processing machine. This allows, for example, the preparation of predictions about the structure of impurities, possible effects on the railway manufacturing process and possible hazards in certain positions or under specified operating conditions. As a result, it is possible to selectively counteract and thus ensure a high quality of the final product with reduced risk of malfunction and shutdown of the machine.
  • FIG. 2 shows in a similar representation as in FIG. 1 a modified embodiment of a device designed according to the invention.
  • illumination with an LED light strip 9 and a plurality of line scan cameras 3 ' are provided in FIG. 2 in order to reliably and conveniently record a complete image of the roll surface.
  • a single sensor unit 3 may not be sufficient if the length of the roller 2 exceeds a certain value.
  • individual line scan cameras 3 ', each of which covers only one area are more cost-effective than a long sensor unit 3. Roller lengths of 10 m and more are no longer a rarity in the paper industry.
  • the invention is not limited to the illustrated embodiments.
  • more than one sensor unit 3 can be connected to the evaluation unit 5, wherein the sensor units 3 can then be arranged on different rollers 2 or on the same roller 2, for example in positions opposite one another. It is possible to couple a plurality of sensor units 3 with a plurality of evaluation units 5 and the latter to one another to achieve more spacious surveillance. The connection or integration of the evaluation units 5 in the machine control is also possible.

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  • Paper (AREA)

Abstract

L'invention concerne un dispositif pour le conditionnement, en particulier le raclage, d'un rouleau, en particulier dans une machine de production, de traitement et/ou de transformation de bandes, telle qu'une machine à papier, à carton, à ouate ou à feuilles, qui comprend au moins un ensemble capteur, disposé dans la zone du rouleau à racler, et au moins une unité d'évaluation. Au moins une partie d'une surface du rouleau est réalisée de sorte que la surface peut être captée au moyen dudit au moins un ensemble capteur et le degré d'encrassement peut être évalué par mise en opposition de parties de surface propres et encrassées et/ou par reconnaissance de formes et/ou par reconnaissance d'images au moyen de l'unité d'évaluation.
PCT/EP2012/072102 2011-11-11 2012-11-08 Dispositif et procédé de conditionnement d'un rouleau WO2013068442A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011086139.4 2011-11-11
DE201110086139 DE102011086139A1 (de) 2011-11-11 2011-11-11 Vorrichtung und Verfahren zur Konditionierung einer Walze

Publications (1)

Publication Number Publication Date
WO2013068442A1 true WO2013068442A1 (fr) 2013-05-16

Family

ID=47222039

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/072102 WO2013068442A1 (fr) 2011-11-11 2012-11-08 Dispositif et procédé de conditionnement d'un rouleau

Country Status (2)

Country Link
DE (1) DE102011086139A1 (fr)
WO (1) WO2013068442A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI695917B (zh) * 2020-01-15 2020-06-11 正承精密工業股份有限公司 用於含浸機的膠料刮除裝置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021104870A1 (de) 2021-03-01 2022-09-01 Voith Patent Gmbh Einstellung von Walzen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3716902A1 (de) * 1987-05-20 1988-12-15 Kleinewefers Gmbh Vorrichtung zum reinigen einer walze an kalandern, glaettwerken u. dgl.
WO1998046826A1 (fr) * 1997-04-11 1998-10-22 Enso Oy Procede, dispositif et son utilisation pour controler l'etat d'un rouleau dans une machine a papier
DE19961666A1 (de) * 1999-12-21 2001-07-05 Voith Paper Patent Gmbh Vorrichtung zum zeitweisen Reinigen einer Walze eines Kalanders, Glättwerks und dergleichen
WO2002020901A1 (fr) 2000-09-06 2002-03-14 Metso Paper, Inc. Procede et equipement de nettoyage et de support de rouleaux
EP2221607A1 (fr) * 2009-02-20 2010-08-25 Voith Patent GmbH Procédé et dispositif de mesure destinés à la détection et à l'évaluation optiques d'une bande contenant des fibres

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3716902A1 (de) * 1987-05-20 1988-12-15 Kleinewefers Gmbh Vorrichtung zum reinigen einer walze an kalandern, glaettwerken u. dgl.
WO1998046826A1 (fr) * 1997-04-11 1998-10-22 Enso Oy Procede, dispositif et son utilisation pour controler l'etat d'un rouleau dans une machine a papier
DE19961666A1 (de) * 1999-12-21 2001-07-05 Voith Paper Patent Gmbh Vorrichtung zum zeitweisen Reinigen einer Walze eines Kalanders, Glättwerks und dergleichen
WO2002020901A1 (fr) 2000-09-06 2002-03-14 Metso Paper, Inc. Procede et equipement de nettoyage et de support de rouleaux
EP2221607A1 (fr) * 2009-02-20 2010-08-25 Voith Patent GmbH Procédé et dispositif de mesure destinés à la détection et à l'évaluation optiques d'une bande contenant des fibres

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI695917B (zh) * 2020-01-15 2020-06-11 正承精密工業股份有限公司 用於含浸機的膠料刮除裝置

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