EP1516954B1 - Dispositif pour déterminer l'état d'au moins une bande sans fin - Google Patents

Dispositif pour déterminer l'état d'au moins une bande sans fin Download PDF

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Publication number
EP1516954B1
EP1516954B1 EP04104210A EP04104210A EP1516954B1 EP 1516954 B1 EP1516954 B1 EP 1516954B1 EP 04104210 A EP04104210 A EP 04104210A EP 04104210 A EP04104210 A EP 04104210A EP 1516954 B1 EP1516954 B1 EP 1516954B1
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EP
European Patent Office
Prior art keywords
measuring
band
permeability
measurement
material web
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.)
Active
Application number
EP04104210A
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German (de)
English (en)
Other versions
EP1516954A3 (fr
EP1516954A2 (fr
Inventor
Wolfgang Ulfert
Ralf Pfifferling
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.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
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Filing date
Publication date
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Publication of EP1516954A2 publication Critical patent/EP1516954A2/fr
Publication of EP1516954A3 publication Critical patent/EP1516954A3/fr
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Publication of EP1516954B1 publication Critical patent/EP1516954B1/fr
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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
    • D21G9/0009—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
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/32—Washing wire-cloths or felts

Definitions

  • the invention relates to a device for assessing the condition of at least one circulating belt, in particular a water-absorbing dewatering belt and / or a transfer belt in a paper machine, with a device for measuring the permeability of the at least one circulating belt and with a device for measuring in at least a band contained moisture.
  • Such a device is for example from the document U.S.-A-5,349,845 known.
  • the invention has the object that the reliability and accuracy in the assessment of the nature of the at least one circulating belt is improved by the device of the type mentioned.
  • the invention solves this problem by a device of the type mentioned, which according to the invention on a winding machine, a device for moisture measurement of a material web, in particular a fibrous web having.
  • the device according to the invention provides further information about the state of the at least one circulating belt. Since the device according to the invention makes it possible to measure the permeability and the humidity during operation, it can permanently provide accurate information about the instantaneous state of the at least one circulating belt. Since a constant monitoring of the nature of the at least one circulating belt is possible, a high quality of a fibrous web to be produced can be ensured in this way.
  • the time interval between the permeability measurement and the humidity measurement should not be more than five hours, since the at least one circulating band changes with time. If the time interval between the permeability measurement and the moisture measurement is too great, contamination on the at least one circulating belt or wear on the at least one circulating belt can falsify the information obtained.
  • the moisture measurement and the measurement of the permeability are carried out at the same location of the at least one circulating belt, it is possible to obtain very precise information regarding the nature of the at least one circulating belt.
  • the measuring points for the permeability and moisture measurement in the strip running direction are consecutive. It makes sense that the distances of the two measuring points are relatively short, so that one can perform an almost simultaneous measurement of the two measured values, taking into account the high belt speeds.
  • the two measuring points can be arranged transversely to the direction of tape travel, in which case the distances of the two measuring points should be relatively short in order to obtain reliable information as possible about the nature of the at least one circulating belt. If the moisture and the permeability are measured at different points of the at least one circulating belt and the distances of the two measuring points are relatively short, one can mathematically the one measuring point, for example, the measuring point at which the moisture is measured, the other measuring point, for example Assign the measuring point at which the permeability is measured.
  • the device according to the invention can also have a device for measuring the strip temperature.
  • the temperature of the at least one circulating belt can be measured.
  • the determined band temperature also provides information about the nature of the at least one circulating band.
  • the belt temperature at dirty spots, holes, cracks and the like differs from the belt temperature at clean or faultless belt locations.
  • the measured strip temperature may be useful for controlling the temperature of a measurement fluid necessary for permeability measurement.
  • the device has, after a press section, a device for measuring the moisture content of the material web, in particular the fibrous web. If the at least one circulating belt is a dewatering belt, its nature directly influences the moisture of the material web to be produced. Thus, the measured moisture of the material web in the press section provides information about the nature of the at least one circulating belt.
  • the device may be provided with a device for determining the basis weight of the material web, in particular the fibrous web. If the at least one circulating belt is a drainage belt, its quality also directly influences the basis weight of the material web to be produced. Thus, the basis weight of the material web also provides information about the nature of the at least one circulating belt.
  • the apparatus may also include means for measuring a hall temperature that is along the width of the at least one circulating belt.
  • the hall temperature is measured with this device, in particular in the vicinity of the at least one circulating belt. Since the at least one circulating belt gives off heat to the hall environment during operation, the distribution of the hall temperature along its width provides information about its condition. At the locations where the at least one circumferential band is heavily soiled or has holes, cracks or the like, the heat radiation varies.
  • the difference between the two temperatures along the width of the at least one circulating belt can be determined, which also statements about its nature can be made.
  • the device for measuring the hall temperature can be arranged on a cleaning unit for cleaning the at least one circulating belt.
  • the device may have a device for measuring the thickness of the at least one circulating belt. Deposits increase its thickness, whereas belt abrasions reduce its thickness.
  • the nature of the at least one circulating belt is also directly related to the tension prevailing in it. Therefore, it makes sense to equip the device with a device for measuring the tension prevailing in the at least one circulating belt. Heavy belt abrasion, contamination on the at least one circulating belt and other influences can increase the tension.
  • the device can be equipped with a device for measuring the filler content of the material web.
  • the fillers contained in the material web can clog the pores of the at least one circulating belt.
  • it can be concluded from the filler content of the material web on a degree of contamination and / or an increase in the contamination of the at least one circulating belt.
  • the device has a device for measuring a pressure that prevails in a nip between two rollers, and / or a device for measuring the thickness of the material web.
  • the at least one circulating belt as a dewatering belt also influences the thickness of the material web to be produced, its nature also depends on the level of pressure which prevails in the nip between two rolls.
  • the pressure in the nip between two rollers provides information about the nature of the at least one circulating belt.
  • the measurement of the thickness of the material web can advantageously be carried out by measuring the web tension in the web prevails done.
  • the device has a device for measuring at least one surface property of the material web, in particular the roughness, the contamination (pigments, substance) and the like.
  • Fig. 1 shows a side view of a paper machine 10, with which a material web 11 is produced.
  • the material web 11 may be a paper, board or tissue or other fibrous web.
  • the paper machine 10 has various circumferential bands 12, 13, 14 and 15.
  • the band 12 performs the function of a first top felt receiving the material web 11, the band 13 the function of a first underfelt, the band 14 the function of a second top felt and the band 15 the function of a second bottom felt.
  • the band 15 is a transfer band.
  • the bands 12, 13, 14 and 15 are provided with measuring devices 20, 21, 22 and 23 (see Fig. 2 ).
  • the measuring devices 20, 21, 22 and 23 are equipped with devices not shown here for measuring the permeability and / or the humidity of the bands 12, 13, 14 and 15. In this way, reliable information about the nature of the bands 12, 13, 14 and 15 can be obtained. If a high permeability is measured, then this may indicate clean bands 12, 13, 14 or 15. However, it may also be that the bands 12, 13, 14 or 15 have a hole, a crack or the like, so that a high permeability is also measured in this case. In order to rule out misinterpretations that may arise from the permeability measurement, the moisture measurement is additionally performed.
  • the measuring devices 20, 21, 22 and 23 are connected via measuring signal lines 19 to an evaluation unit 16 which activates the conditioning devices 25, 26, 27 or 28 as needed for cleaning the belts 12, 13, 14 or 15. If the belt 15 is a transfer belt, the conditioning device 28 is eliminated.
  • a device for measuring the temperature of the bands 12, 13, 14 and 15 may be provided.
  • the paper machine 10 has, at the end of a press section 17, a device 18 for measuring the moisture content of the material web 11 and, on a winding machine 100, a measuring device 101 for measuring the moisture content of the material web 11.
  • the humidity measured with the devices 18 and 101 provides information about the nature of the belts 12, 13, 14 and 15.
  • the humidity value measured by the devices 18 and 101 is transmitted to the evaluation unit 16 via measuring signal lines 19.
  • a headbox 103 and a steam blower box 104 can be controlled via control signal lines 102 according to the nature of the belts 12, 13, 14 and 15.
  • the dilution flow is increased in this control process.
  • the amount of steam leakage is controlled depending on the nature of the belts 12, 13, 14 and 15. In this way, the quality of the material web to be produced can be compensated with the steam blower box 104, if this was impaired by a deterioration of the condition of the belts 12, 13, 14 and 15. In addition, the state of the belts 12, 13, 14 and 15 can be acted upon by the steam blower box 104.
  • the measured values interacting with one another can be detected and evaluated in order to be able to carry out corresponding changes in the process of material web production and / or conditioning of the belts 12, 13, 14 and 15.
  • the belts 12, 13, 14 and 15 are kept in a state which ensures the production of a material web of good quality.

Landscapes

  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Claims (16)

  1. Dispositif pour déterminer l'état d'au moins une bande sans fin (12, 13, 14, 15), notamment d'une bande d'égouttage recevant de l'eau et/ou d'une bande de transfert dans une machine à papier (10), comprenant un appareil de mesure de la perméabilité de l'au moins une bande sans fin (12, 13, 14, 15) et comprenant un appareil de mesure de l'humidité contenue dans l'au moins une bande (12, 13, 14, 15),
    caractérisé en ce qu'il présente, sur une bobineuse (100), un appareil (101) pour mesurer l'humidité d'une bande de matériau (11), notamment d'une bande fibreuse.
  2. Dispositif selon la revendication 1,
    caractérisé en ce que
    la mesure de l'humidité de l'au moins une bande sans fin peut être effectuée en même temps ou de manière décalée dans le temps par rapport à la mesure de la perméabilité.
  3. Dispositif selon la revendication 1 ou 2,
    caractérisé en ce que
    la mesure de l'humidité et la mesure de la perméabilité peuvent être effectuées au même endroit de l'au moins une bande sans fin (12, 13, 14, 15).
  4. Dispositif selon la revendication 1 ou 2,
    caractérisé en ce que
    la mesure de l'humidité et la mesure de la perméabilité peuvent être effectuées en des endroits différents de l'au moins une bande sans fin (12, 13, 14, 15).
  5. Dispositif selon la revendication 4,
    caractérisé en ce que
    le point de mesure pour la mesure de la perméabilité et le point de mesure pour la mesure de l'humidité sont situés très près l'un de l'autre.
  6. Dispositif selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce
    qu'il présente un appareil pour mesurer la température de la bande.
  7. Dispositif selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce
    qu'il présente, après une section de pressage (17), un appareil (18) pour mesurer l'humidité de la bande de matériau (11), notamment de la bande fibreuse.
  8. Dispositif selon l'une quelconque des revendications 1 à 7,
    caractérisé en ce
    qu'il présente un appareil pour déterminer le grammage de la bande de matériau (11), notamment de la bande fibreuse.
  9. Dispositif selon l'une quelconque des revendications 1 à 8,
    caractérisé en ce
    qu'il présente un appareil pour mesurer une température ambiante qui règne le long de la largeur de l'au moins une bande sans fin (12, 13, 14, 15).
  10. Dispositif selon la revendication 9,
    caractérisé en ce que
    l'appareil pour mesurer la température ambiante est disposé sur une unité de nettoyage pour nettoyer l'au moins une bande sans fin (12, 13, 14, 15).
  11. Dispositif selon l'une quelconque des revendications 1 à 10,
    caractérisé en ce
    qu'il présente un appareil pour mesurer l'épaisseur de l'au moins une bande sans fin (12, 13, 14, 15).
  12. Dispositif selon l'une quelconque des revendications 1 à 11,
    caractérisé en ce
    qu'il présente un appareil pour mesurer la contrainte de traction appliquée à l'au moins une bande sans fin (12, 13, 14, 15).
  13. Dispositif selon l'une quelconque des revendications 1 à 12,
    caractérisé en ce
    qu'il présente un appareil pour mesurer la teneur en charges de la bande de matériau (11).
  14. Dispositif selon l'une quelconque des revendications 1 à 13,
    caractérisé en ce
    qu'il présente un appareil pour mesurer une pression qui règne dans le pinçage entre deux cylindres.
  15. Dispositif selon l'une quelconque des revendications 1 à 14,
    caractérisé en ce
    qu'il présente un appareil pour mesurer l'épaisseur de la bande de matériau (11).
  16. Dispositif selon l'une quelconque des revendications 1 à 15,
    caractérisé en ce
    qu'il présente un appareil pour mesurer au moins une propriété de surface de la bande de matériau (11), notamment la rugosité, l'encrassement, ou similaires.
EP04104210A 2003-09-19 2004-09-02 Dispositif pour déterminer l'état d'au moins une bande sans fin Active EP1516954B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10343418A DE10343418A1 (de) 2003-09-19 2003-09-19 Vorrichtung und Verfahren zur Beurteilung der Beschaffenheit mindestens eines umlaufenden Bandes
DE10343418 2003-09-19

Publications (3)

Publication Number Publication Date
EP1516954A2 EP1516954A2 (fr) 2005-03-23
EP1516954A3 EP1516954A3 (fr) 2006-03-29
EP1516954B1 true EP1516954B1 (fr) 2008-03-19

Family

ID=34177837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04104210A Active EP1516954B1 (fr) 2003-09-19 2004-09-02 Dispositif pour déterminer l'état d'au moins une bande sans fin

Country Status (4)

Country Link
US (2) US20050103095A1 (fr)
EP (1) EP1516954B1 (fr)
AT (1) ATE389744T1 (fr)
DE (2) DE10343418A1 (fr)

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US7938935B2 (en) * 2007-10-11 2011-05-10 Honeywell Asca Inc. Infrared measurement of paper machine clothing condition
ITMI20101699A1 (it) * 2010-09-17 2012-03-18 Giuseppe Cristini S P A Sa Apparecchiatura e metodo di controllo delle condizioni di un nastro circolante in una macchina di fabbricazione della carta
IT1401944B1 (it) 2010-09-17 2013-08-28 Giuseppe Cristini S P A Sa Apparecchio portatile di controllo delle condizioni di un nastro circolante in una macchina di fabbricazione della carta
DE102012208201A1 (de) * 2012-05-16 2013-11-21 Voith Patent Gmbh Verfahren zur Erfassung von Verschmutzung einer Papiermaschinenbespannung
US9540769B2 (en) 2013-03-11 2017-01-10 International Paper Company Method and apparatus for measuring and removing rotational variability from a nip pressure profile of a covered roll of a nip press
FI125811B (en) * 2013-05-29 2016-02-29 Valmet Automation Oy Track measurement
ITMI20132213A1 (it) * 2013-12-27 2015-06-28 Giuseppe Cristini S P A Sa Apparecchiatura e metodo per controllare le condizioni di almeno un nastro circolante in una macchina di fabbricazione della carta e macchina di fabbricazione della carta comprendente detta apparecchiatura
US9804044B2 (en) 2014-05-02 2017-10-31 International Paper Company Method and system associated with a sensing roll and a mating roll for collecting data including first and second sensor arrays
US10378980B2 (en) 2014-05-02 2019-08-13 International Paper Company Method and system associated with a sensing roll and a mating roll for collecting roll data
US9797788B2 (en) 2014-05-02 2017-10-24 International Paper Company Method and system associated with a sensing roll including pluralities of sensors and a mating roll for collecting roll data
US9863827B2 (en) 2015-06-10 2018-01-09 International Paper Company Monitoring machine wires and felts
US10370795B2 (en) 2015-06-10 2019-08-06 International Paper Company Monitoring applicator rods and applicator rod nips
US9816232B2 (en) 2015-06-10 2017-11-14 International Paper Company Monitoring upstream machine wires and felts
US9534970B1 (en) 2015-06-10 2017-01-03 International Paper Company Monitoring oscillating components
US9696226B2 (en) * 2015-06-10 2017-07-04 International Paper Company Count-based monitoring machine wires and felts
US9677225B2 (en) 2015-06-10 2017-06-13 International Paper Company Monitoring applicator rods
CN106442232B (zh) * 2016-09-18 2018-12-14 上海理工大学 基于动态称重的颗粒物料分类装置和方法
IT201900018350A1 (it) * 2019-10-09 2021-04-09 Binet Sul Liri Eng Fabrics S P A Sistema e metodo di rilevamento di una zona di criticità in un feltro

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Also Published As

Publication number Publication date
EP1516954A3 (fr) 2006-03-29
EP1516954A2 (fr) 2005-03-23
US20080087073A1 (en) 2008-04-17
DE10343418A1 (de) 2005-04-21
US20050103095A1 (en) 2005-05-19
ATE389744T1 (de) 2008-04-15
DE502004006557D1 (de) 2008-04-30
US7506550B2 (en) 2009-03-24

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