WO2022184356A1 - Einstellung von walzen - Google Patents
Einstellung von walzen Download PDFInfo
- Publication number
- WO2022184356A1 WO2022184356A1 PCT/EP2022/052288 EP2022052288W WO2022184356A1 WO 2022184356 A1 WO2022184356 A1 WO 2022184356A1 EP 2022052288 W EP2022052288 W EP 2022052288W WO 2022184356 A1 WO2022184356 A1 WO 2022184356A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- image
- suction
- calculation unit
- roller
- values
- Prior art date
Links
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000010191 image analysis Methods 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000003190 augmentative effect Effects 0.000 description 9
- 238000001514 detection method Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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
- D21G9/0009—Paper-making control systems
- D21G9/0036—Paper-making control systems controlling the press or drying section
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/10—Suction rolls, e.g. couch rolls
Definitions
- the invention relates to a method and a device for adjusting suction rolls, in particular for use in a machine for producing or processing a paper web or another fibrous web
- Suction rolls are perforated rolls with regions on the surface where a vacuum is created to hold water or deflect the paper web. These regions are called “suction zones”.
- the suction zones of a suction roll are separated by sealing strips located below the shell.
- a water lubricating film forms between the sealing strips and the roller shell, which seals the suction zones.
- a special type of suction rolls are suction press rolls. Together with a counter-element, usually a counter-roll, these suction rolls form a press nip for pressing and dewatering the fibrous web.
- Suction rollers of this type and the adjustable sealing strips and format limiters are described, for example, in the documents DE 102009000371 or EP2707544 B1.
- the position of the sealing strips, and thus the positioning of the region of the roll shell where the vacuum is applied, is extremely important in the case of suction press rolls, for example, in order to enable optimal dewatering of the paper web. If the suction box is positioned incorrectly, the dry content of the fibrous web can be 1-2 percentage points lower than when it is optimally positioned, which represents a massive loss of press efficiency.
- the suction box is rotated using markings (identification of the position of the sealing strips) on the driver's side until the position is approximately correct (no direct comparison between sealing strips and covering possible);
- the suction zone must not be too narrow (compared to the paper web) in order to avoid “edge flipping", i.e. the paper web lifting or folding over.
- it must also not be wider than the paper web in order to avoid false air, which significantly increases energy consumption.
- the traditional adjustment of size gauges is done through a bar on the front side (threaded rod, usually with dimensions) that indicates the depth of the size gauge. Since this display does not allow a direct comparison between the position of the paper web and the format limiter, the setting depends on the experience of the employee. Here, the operator pays attention, for example, to any fluttering of the paper web, which indicates that the format limiter is too far into the paper web and therefore there is no longer a vacuum at the edge.
- document EP2707544 B1 also discloses more modern, optical solutions that enable the format limiters to be recognized on the paper web. Such solutions require an intervention in the roller and the installation of electrical components to generate the light source. In addition, such a system is not suitable for all paper/felt combinations. Some combinations are so "thick" that the light beam is no longer recognizable.
- the object of the present invention is to improve the weaknesses of the prior art.
- a "method for adjusting a suction roll" in the context of this application is also understood to mean a method in which, after the representation of the determined actual values by superimposition no changes or adjustments are made to the position of the non-visible components with the image and/or video recording on a display, since, for example, the components are already correctly positioned.
- the method also includes the step: - Determination of recommendations for setting the suction roll from the target/actual comparison
- the object is achieved by a device for adjusting a suction roll, in particular for a machine for producing or processing a fibrous web, comprising a camera for recording an image/video recording, a calculation unit and a display, the camera with the calculation unit being such is in contact that it can transmit image and/or video recordings to the calculation unit.
- the device is set up to carry out a method according to one aspect of the invention.
- the proposed methods include aspects of so-called augmented reality (AR)
- AR augmented reality
- augmented virtuality augmented virtuality
- mixed reality augmented reality
- augmented reality and mixed reality are mostly used synonymously.
- augmented reality In contrast to virtual reality, in which the user is completely immersed in a virtual world, augmented reality focuses on displaying additional information. For the visual modality, this leads to much more stringent requirements for position determination (tracking) and calibration.
- An AR system is the system of technical components that are necessary to build an augmented reality application: camera, tracking devices, support software, etc.
- the literature mostly uses Azuma's definition of augmented reality
- an embodiment of the invention can also locate the format limiter of the suction roll with respect to the paper web. In this way, you can also use the system to adjust this component without having to install an additional system in the roller. This is particularly advantageous for customers who cannot benefit from an optical system as in EP2707544 B1 because the light intensity is not sufficient.
- the app can also provide live data from the PLS / QCS, such as moisture content of the paper web, moisture profile, press load, vacuum, etc.
- live data such as moisture content of the paper web, moisture profile, press load, vacuum, etc.
- the main focus of the solution is the identification of the delimitations of the suction zones of a suction roll by means of a constructive intervention (AR projection) in order to optimally adjust them in the machine.
- a mobile computer e.g. mobile phone, tablet, AR-Goggles
- a mobile computer can be used as an interface for the paper maker, which uses image recognition to recognize certain prominent points or markings on the roller, which serve as input for the application.
- the solution is divided into 2 functions.
- the main focus is the virtual projection of the non-visible components of a suction roll onto the environment in order to be able to determine the exact and direct position. without having to estimate them mentally or extrapolate them (which is always imprecise):
- “Suction box positioning” Based, for example, on markings on the suction box.
- the AR tool projects an identification (e.g. colored lines) onto the roll shell/clothing/paper web so that region "A" (roller-clothing separation) can be recognized and the suction box can be adjusted.
- the projection is usually carried out as a virtual projection, i.e. as a representation of the projected element on the interface, as the mobile phone display or similar
- a "traffic light system” can be implemented in the AR application as support, so that the optimal setting with the application is determined;
- the virtual projection of non-visible components onto a suction roller can be carried out with the support of a compact computer (e.g. smartphone, tablet or AR glasses) that has access to a camera and screen.
- a compact computer e.g. smartphone, tablet or AR glasses
- An embodiment according to one aspect of the invention can be, for example, the following method:
- the computer can be a smartphone, a tablet or AR glasses, for example;
- This step can be done by (real-time) image recognition (e.g. recognition of marker(s) on the roller) and/or embedded sensors (more in section Error! Reference source could not be found.);
- Reference values for the determined parameters can be downloaded from a database (ID tagging support improves the usability of the application) and/or entered by the user; 4. The position of the non-visible components is compared with an ideal state based on actual and target values; this can be done either with a time delay or in real time.
- step 2 Based on determined actual values (step 2) and reference values (step 3), the position of the non-visible components is superimposed on the image/video recording. A representation as in error! Reference source could not be found, can be seen can be applied for. Again, this can be done either with a time delay or in real time
- a display with a target/actual comparison can be displayed to support the user in setting the suction box/format limiter;
- roller the operator adjusts the roller (sealing strip or format limiter); this can either happen in real time while simultaneously observing the AR image and approaching the desired state, or delayed by examining the current situation and then making a change and then examining the situation again.
- Steps 1-6 are repeated;
- Steps 1-8 are repeated until the target/actual comparison is satisfactory for the operator.
- the display consists of projected colored lines that represent the position of sealing strips and/or format limiters.
- the inputs for the application are based on image processing - detection of markings on the roller and depth of the threaded rod of the format limiter.
- the device e.g. mobile phone, tablet, AR goggles
- the device can rely on sensors installed on the roller. Examples:
- Suction box positioning o Detection of the relative angle of the suction box to the assembly position by using e.g. an encoder; o Detection of the absolute angle of the suction box using e.g. an acceleration sensor;
- FIG. 1 shows a possible representation of the determined actual values
- FIGS. 2a, 2b, 2c show alternative representations of the determined actual values.
- FIG. 1 shows a calculation unit 2 with a display 3, as is suitable for use in an embodiment of the present invention.
- the calculation unit 2 is a calculation unit 2 with a display 3, as is suitable for use in an embodiment of the present invention.
- an image or video recording of the suction roller 1 is transmitted.
- the calculation unit 2 can then determine the position of non-visible internal installations such as sealing strips or format limiters by image analysis of the image and/or video recording from the outside of the roller and/or by recording values from embedded sensors.
- the threaded rod for adjusting the format limiters which usually has dimensions, can be recognized and evaluated on the image, which allows the position of these format limiters to be determined.
- optical markings can be provided on the cover of the roller, from which the position of these sealing strips can be determined by means of image analysis.
- the calculation unit can be connected to a further database from which information about the relevant suction roll is stored.
- the suction roll can be identified, for example, via an ID tag. This can either be visually recognizable directly from the image or video recording.
- another tag e.g. an RFID tag, can also be used. In general, it is then an advantage if this tag can also be read out directly by the calculation unit, e.g. a mobile phone or tablet computer.
- FIG. 1 shows an example of how the position of two sealing strips is superimposed on the display 3 of the calculation unit 2 as a dashed line in the picture or video recording of the suction roller 1 .
- FIGS. 2a, 2b and 2c show alternative representations of the internals on the picture of the suction roll. As in FIG. 2a, sealing strips and format limiters can be displayed simultaneously. FIG. 2b shows an example of the area that is sucked out, which is formed by sealing strips and format limiters.
Landscapes
- Paper (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
- Crushing And Grinding (AREA)
- Secondary Cells (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/277,492 US20240125049A1 (en) | 2021-03-01 | 2022-02-01 | Adjusting rolls |
EP22702965.9A EP4301926A1 (de) | 2021-03-01 | 2022-02-01 | Einstellung von walzen |
AU2022228597A AU2022228597A1 (en) | 2021-03-01 | 2022-02-01 | Adjusting rolls |
CA3209771A CA3209771A1 (en) | 2021-03-01 | 2022-02-01 | Adjusting rolls |
CN202280016932.8A CN116888323A (zh) | 2021-03-01 | 2022-02-01 | 对辊子的调设 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021104870.2A DE102021104870A1 (de) | 2021-03-01 | 2021-03-01 | Einstellung von Walzen |
DE102021104870.2 | 2021-03-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022184356A1 true WO2022184356A1 (de) | 2022-09-09 |
Family
ID=80222491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/052288 WO2022184356A1 (de) | 2021-03-01 | 2022-02-01 | Einstellung von walzen |
Country Status (7)
Country | Link |
---|---|
US (1) | US20240125049A1 (de) |
EP (1) | EP4301926A1 (de) |
CN (1) | CN116888323A (de) |
AU (1) | AU2022228597A1 (de) |
CA (1) | CA3209771A1 (de) |
DE (1) | DE102021104870A1 (de) |
WO (1) | WO2022184356A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022108707A1 (de) | 2022-04-11 | 2023-10-12 | Voith Patent Gmbh | Verfahren und Vorrichtung zum Einstellen einer Schuhpresswalze |
DE102022108709A1 (de) | 2022-04-11 | 2023-10-12 | Voith Patent Gmbh | Verfahren zum Einstellen |
DE102022108708A1 (de) | 2022-04-11 | 2023-10-12 | Voith Patent Gmbh | Verfahren und Vorrichtung zum Einstellen einer Schuhpresse |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4241400A1 (en) * | 1991-12-19 | 1993-06-24 | Escher Wyss Gmbh | Paper web take=up for drying section of paper mfg. machine - by using suction roller inner chambers with stepless control to set suction action to catch end of web at leader sides |
DE102009000371A1 (de) | 2009-01-22 | 2010-08-05 | Voith Patent Gmbh | Saugwalze |
DE102011075806A1 (de) * | 2011-05-13 | 2012-11-15 | Voith Patent Gmbh | Dichtungsanordnung |
AT522782A4 (de) * | 2019-12-19 | 2021-02-15 | Roechling Leripa Papertech Gmbh & Co Kg | Saugwalze |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2001285973A1 (en) | 2000-09-06 | 2002-03-22 | Metso Paper Inc. | Method and equipment for cleaning and maintaining rolls |
FI114229B (fi) | 2003-04-04 | 2004-09-15 | Metso Paper Inc | Menetelmä imutelan aksiaalitiivisteen seurannassa |
DE102011086139A1 (de) | 2011-11-11 | 2013-05-16 | Voith Patent Gmbh | Vorrichtung und Verfahren zur Konditionierung einer Walze |
DE102015207383B4 (de) | 2015-04-23 | 2019-08-14 | Voith Patent Gmbh | Verfahren und Vorrichtung zur Überwachung einer Dichtungseinrichtung |
-
2021
- 2021-03-01 DE DE102021104870.2A patent/DE102021104870A1/de active Pending
-
2022
- 2022-02-01 AU AU2022228597A patent/AU2022228597A1/en active Pending
- 2022-02-01 EP EP22702965.9A patent/EP4301926A1/de active Pending
- 2022-02-01 WO PCT/EP2022/052288 patent/WO2022184356A1/de active Application Filing
- 2022-02-01 CN CN202280016932.8A patent/CN116888323A/zh active Pending
- 2022-02-01 CA CA3209771A patent/CA3209771A1/en active Pending
- 2022-02-01 US US18/277,492 patent/US20240125049A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4241400A1 (en) * | 1991-12-19 | 1993-06-24 | Escher Wyss Gmbh | Paper web take=up for drying section of paper mfg. machine - by using suction roller inner chambers with stepless control to set suction action to catch end of web at leader sides |
DE102009000371A1 (de) | 2009-01-22 | 2010-08-05 | Voith Patent Gmbh | Saugwalze |
DE102011075806A1 (de) * | 2011-05-13 | 2012-11-15 | Voith Patent Gmbh | Dichtungsanordnung |
EP2707544B1 (de) | 2011-05-13 | 2015-07-08 | Voith Patent GmbH | Dichtungsanordnung |
AT522782A4 (de) * | 2019-12-19 | 2021-02-15 | Roechling Leripa Papertech Gmbh & Co Kg | Saugwalze |
Also Published As
Publication number | Publication date |
---|---|
DE102021104870A1 (de) | 2022-09-01 |
CA3209771A1 (en) | 2022-09-09 |
US20240125049A1 (en) | 2024-04-18 |
CN116888323A (zh) | 2023-10-13 |
AU2022228597A1 (en) | 2023-09-21 |
EP4301926A1 (de) | 2024-01-10 |
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