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EP0989234B1 - Couteau racleur - Google Patents

Couteau racleur Download PDF

Info

Publication number
EP0989234B1
EP0989234B1 EP99111853A EP99111853A EP0989234B1 EP 0989234 B1 EP0989234 B1 EP 0989234B1 EP 99111853 A EP99111853 A EP 99111853A EP 99111853 A EP99111853 A EP 99111853A EP 0989234 B1 EP0989234 B1 EP 0989234B1
Authority
EP
European Patent Office
Prior art keywords
doctor
roll
scraper
doctor blade
holder
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.)
Expired - Lifetime
Application number
EP99111853A
Other languages
German (de)
English (en)
Other versions
EP0989234A3 (fr
EP0989234A2 (fr
Inventor
Hans Prinzing
Dirk Thomas
Anton Eichinger
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 Paper 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 Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0989234A2 publication Critical patent/EP0989234A2/fr
Publication of EP0989234A3 publication Critical patent/EP0989234A3/fr
Application granted granted Critical
Publication of EP0989234B1 publication Critical patent/EP0989234B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F2/00—Transferring continuous webs from wet ends to press sections
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G3/00—Doctors
    • D21G3/005—Doctor knifes

Definitions

  • the invention relates to a scraper consisting of a scraper holder and a scraper blade for keeping rotating rollers in machines for producing and / or refining fibrous webs clean, the scraper running axially along the roller and the scraper blade being pressed against the surface of the roller and at least one Sensor detects the position of the scraper blade and / or the scraper holder and is connected to a control unit which acts on elements and / or elements at risk due to a malfunction of the scraper in an at least risk-reducing manner.
  • the invention relates above all to scrapers which are arranged on a roller in the press section, in particular a press roller.
  • Scrapers of this type have been in use for a long time, the scraper holder being pressed on in a generally pneumatically adjustable manner.
  • a scraper with restricted function can result in the roller no longer being able to fulfill its function, for example when dewatering the fibrous web.
  • the object of the invention is therefore to at least reduce damage due to malfunction of scrapers.
  • the object was achieved in that, in the case of a roller in the press section, in particular a press roller, the control unit in the event of a malfunction of the scraper acts on the take-off roller taking over the fibrous web from an upstream machine unit in such a way that it is pivoted away to interrupt the takeover of the fibrous web.
  • the fibrous web 1 is removed from a screen 5 of a machine unit upstream of the press section in the form of the screen section. This is done with the help of a suction roll 10 wrapped around by an endless press felt 2. Thereafter, the fibrous web 1 runs together with the press felt 2 through a press nip formed by two rolls 3 and 4.
  • a scraper consisting of a scraper holder 8 and a scraper blade 9 is arranged on the lower roller 4. The scraper blade 9 is pressed pneumatically against the surface of the roller 4 to be cleaned via the scraper holder 8.
  • a sensor 7 monitors the position of the scraper.
  • the control unit 6 connected to the sensor 7 causes that with the aid of the adjusting member 11, the take-off roller 10 is pivoted away from the screen 5.
  • the scraper can be pivoted away from the roller 4, the rollers 3 and 4 stopped, cleaned and possibly also repaired.

Landscapes

  • Paper (AREA)

Claims (2)

  1. Racloir, se composant d'un support de racloir (8) et d'une lame de racloir (9) pour garder propre des cylindres en rotation (4) dans des machines de fabrication et/ou d'amélioration de bandes fibreuses (1), le racloir s'étendant axialement le long du cylindre (4) et la lame de racloir (9) étant pressée contre la surface du cylindre (4) et au moins un capteur (7) détectant la position de la lame de racloir (9) et/ou du support de racloir (8) et étant connecté à une unité de commande (6), qui agit sur des éléments agissant de manière dangereuse et/ou sur des éléments à risque en raison d'un mauvais fonctionnement du racloir de manière au moins réduire le risque, disposé dans la section de pressage, notamment d'un cylindre de presse, caractérisé en ce que
    l'unité de commande agit dans le cas d'un mauvais fonctionnement du racloir, sur le cylindre de prélèvement (10) prélevant la bande fibreuse (1) d'une unité de machine montée en amont, de telle sorte que celle-ci soit écartée par pivotement pour interrompre la reprise de la bande fibreuse (1).
  2. Racloir se composant d'un support de racloir (8) et d'une lame de racloir (9) pour garder propre des cylindres en rotation (4) dans des machines de fabrication et/ou d'amélioration de bandes fibreuses (1), le racloir s'étendant axialement le long du cylindre (4) et la lame de racloir (9) étant pressée contre la surface du cylindre (4) et au moins un capteur (7) détectant la position de la lame de racloir (9) et/ou du support de racloir (8) et étant connecté à une unité de commande (6), qui agit sur des éléments agissant de manière dangereuse et/ou sur des éléments à risque en raison d'un mauvais fonctionnement du racloir de manière au moins réduire le risque, notamment selon la revendication 1, caractérisé en ce que le racloir est écarté du cylindre (4) par pivotement dans le cas d'un mauvais fonctionnement.
EP99111853A 1998-09-11 1999-06-19 Couteau racleur Expired - Lifetime EP0989234B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19841637A DE19841637A1 (de) 1998-09-11 1998-09-11 Schaber
DE19841637 1998-09-11

Publications (3)

Publication Number Publication Date
EP0989234A2 EP0989234A2 (fr) 2000-03-29
EP0989234A3 EP0989234A3 (fr) 2000-11-15
EP0989234B1 true EP0989234B1 (fr) 2004-04-28

Family

ID=7880650

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99111853A Expired - Lifetime EP0989234B1 (fr) 1998-09-11 1999-06-19 Couteau racleur

Country Status (2)

Country Link
EP (1) EP0989234B1 (fr)
DE (2) DE19841637A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI115237B (fi) * 2001-04-11 2005-03-31 Metso Paper Inc Menetelmä paperikoneen kaavinlaitteiston toiminnan seuraamiseksi sekä menetelmän toteuttava paperikoneen kaavinlaitteisto

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2417796A (en) * 1943-03-18 1947-03-18 Ecusta Paper Corp Electrical system for doctor blade control in paper making machines
US4919756A (en) * 1988-08-26 1990-04-24 The Procter & Gamble Company Method of and apparatus for compensatingly adjusting doctor blade
SE469035B (sv) * 1991-09-16 1993-05-03 Valmet Karlstad Ab Foerfarande och anordning foer justering av kraeppningsbetingelserna
DE4418464C2 (de) * 1994-05-27 1995-07-06 Voith Ag J M Klingenhalterung

Also Published As

Publication number Publication date
DE59909307D1 (de) 2004-06-03
DE19841637A1 (de) 2000-03-16
EP0989234A3 (fr) 2000-11-15
EP0989234A2 (fr) 2000-03-29

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