EP1215336B1 - Entwässerungsleiste für eine Papiermaschine - Google Patents

Entwässerungsleiste für eine Papiermaschine Download PDF

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Publication number
EP1215336B1
EP1215336B1 EP01129550A EP01129550A EP1215336B1 EP 1215336 B1 EP1215336 B1 EP 1215336B1 EP 01129550 A EP01129550 A EP 01129550A EP 01129550 A EP01129550 A EP 01129550A EP 1215336 B1 EP1215336 B1 EP 1215336B1
Authority
EP
European Patent Office
Prior art keywords
counterblade
assembly
fixed structure
fixed
wires
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
EP01129550A
Other languages
English (en)
French (fr)
Other versions
EP1215336A2 (de
EP1215336A3 (de
Inventor
Fabrizio Tonello
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.)
PMT Italia SpA
Original Assignee
PMT Italia SpA
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
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Application filed by PMT Italia SpA filed Critical PMT Italia SpA
Publication of EP1215336A2 publication Critical patent/EP1215336A2/de
Publication of EP1215336A3 publication Critical patent/EP1215336A3/de
Application granted granted Critical
Publication of EP1215336B1 publication Critical patent/EP1215336B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D21F1/48—Suction apparatus
    • D21F1/483—Drainage foils and bars
    • D21F1/486—Drainage foils and bars adjustable

Definitions

  • the present invention relates to a counterblade assembly for a paper machine.
  • paper machines comprise a unit, or wet section, for separating water from the pulp, and where the pulp is fed and compressed between two permeable wires overlapping along a portion of their respective paths.
  • one of the wires in particular, the top wire
  • the counterblades are normally mounted to slide inside vertical runners, and, in one known solution, are pushed towards the wires by a flexible tubular pneumatic actuator located beneath each counterblade and "inflated" with compressed air.
  • a major drawback of the above counterblade setup lies in the aqueous solution removed from the pulp compressed between the wires seeping between the counterblades and respective runners and forming deposits which, following stoppage of the machine, may result in the counterblades jamming, or in uneven lift of the counterblades across the width of the wires.
  • WO 98 38380 A discloses a counterblade assembly for a wet section of a paper machine having the features of the preamble of claim 1 and including, in particular, a plurality of articulated joints connecting the counterblade to a frame of the machine.
  • the articulated joint elements are hinged about axes that are parallel to the travelling direction of the paper draining wires, i.e. parallel to the friction force that is generated between counterblade and the contacting wire.
  • a counterblade assembly for a wet section of a paper machine as claimed in claim 1.
  • Number 1 in Figure 1 indicates as a whole a unit, or wet section, for removing water from pulp on a paper machine.
  • Unit 1 comprises two wires 2, 3 traveling along respective endless paths and overlapping along a substantially horizontal common portion P of the two paths P1, P2.
  • the top wire 3 is supported, powered and kept taut by a number of cylinders 4 fitted to a fixed frame 5.
  • Vacuum box 6 is defined at the bottom by a number of bottom transverse elements 7 supporting wire 3 and conveniently defined by parallel ceramic inserts spaced apart and defining as a whole a guide surface 8 for guiding wire 3.
  • Wires 2 and 3 are kept contacting each other and guide surface 8 by a number of counterblades 9, each of which forms part of a respective counterblade assembly 10 shown in detail in Figures 2 to 4.
  • Assembly 10 comprises a fixed supporting structure 13 defined by a bar 14, fitted removably to frame 5 of unit 1 and extending across the full width of wires 2, 3, and by a number of posts 15 fixed to the top of, projecting from, and equally spaced along, bar 14.
  • a number of posts 15 fixed to the top of, projecting from, and equally spaced along, bar 14.
  • wires 2, 3 of 3 m in width six equally spaced posts 15 may be used.
  • Counterblade 9 is defined by a main body 17 extending across wires 2, 3 and conveniently made of plastic material, and has a ceramic insert 18 extending along a top edge of body 17 and which slides against wire 2.
  • a vertical face 20 of main body 17 facing fixed structure 13 is fitted with a number of equally spaced vertical bars 21, each facing and connected to a respective post 15 of fixed structure 13 by pairs of articulated rod elements 16.
  • Each post 15 defines, with respective bar 21 and elements 16, an articulated-parallelogram connecting assembly 22 interposed between bar 14 and counterblade 9.
  • counterblade 9 is movable in a substantially vertical direction with no need for runners.
  • each connecting assembly 22 comprises two pairs of elements 16 located on opposite sides of post 15 and bar 21, and each defined by two parallel elements 16 extending in a substantially horizontal direction.
  • Each element has one end 16a hinged to post 15, and one end 16b hinged to bar 21 about respective horizontal axes A, B that are perpendicular to the traveling path P of wires 2, 3.
  • Body 17 of counterblade 9 has a bottom longitudinal recess 24 partly housing a pneumatic actuator 25 defined by a flexible tubular element.
  • Actuator 25 rests on a base plate 26 forming part of frame 5 of unit 1, and is connectable to and pressurised by a compressed-air source (not shown) to lift counterblade 9 into contact with wire 2 with a pressure depending on the pressure in the actuator itself.
  • Counterblade 9 is movable between a top and a bottom limit position shown by the dash lines in Figure 2 and defined respectively by bars 21 contacting respective top stop plates 28 fixed to posts 15, and by bars 21 contacting bar 14.
  • elements 16 are substantially horizontal; and, within the adjustment range of counterblade 9 as a function of the pressure of actuator 25, the movement of counterblade 9 is substantially similar to a straight vertical translatory movement.
  • counterblade assembly 10 according to the present invention will be clear from the foregoing description.
  • counterblade 9 can be connected to fixed structure 13 with no need for conventional runners.
  • each counterblade assembly 10 can be removed by simply disconnecting bar 14 from frame 5.

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  • Paper (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)

Claims (7)

  1. Entwässerungsleistenanordnung für einen nassen Abschnitt (1) einer Papiermaschine, umfassend eine fixierte Struktur (13), die an einem Rahmen (5) der Maschine befestigt ist; eine Entwässerungsleiste (9), die mit der fixierten Struktur (13) verbunden ist und in Bezug darauf durch Betätigungsmittel (25) bewegbar ist, um einen Druck auf zwei Drähte (2, 3) auszuüben, die zwischen der Entwässerungsleiste (9) und einer Führungsfläche (8) entlang einem im wesentlichen horizontalen Bewegungspfad (P) verlaufen; und Verbindungsmittel (22), die zwischen der Entwässerungsleiste (9) und der fixierten Struktur (13) geordnet sind, dadurch gekennzeichnet, dass die Verbindungsmittel (22) gelenkig nach Parallelogrammart verbundene Verbindungsmittel sind und eine Vielzahl von Gelenkstangenelementen (16) umfassen, die an der fixierten Struktur (13) und an der Entwässerungsleiste (9) um entsprechende horizontale Achsen (A, B) senkrecht zu dem Bewegungspfad (P) angelenkt sind.
  2. Anordnung wie in Anspruch 1 beansprucht, dadurch gekennzeichnet, dass die gelenkig nach Parallelogrammart angeordneten Verbindungsmittel eine Anzahl von Verbindungsanordnungen (22) umfassen, die unter Abständen entlang der Entwässerungsleiste (9) angeordnet sind; wobei jede der Verbindungsanordnungen (22) ein erstes Verbindungselement (15), das einstückig mit der fixierten Struktur (13) ist, ein zweites Verbindungselement (21), das einstückig mit der Entwässerungsleiste (9) ist und einem entsprechenden der ersten Verbindungselemente (15) gegenüber liegt, und wenigstens ein Paar von parallelen Gelenkstangenelementen (16) umfassen, die jeweils mit einem ersten Ende (16a) mit den ersten Verbindungselement (15) und mit einem zweiten Ende (16b) mit dem zweiten Verbindungselement (21) gelenkig verbunden sind.
  3. Anordnung wie in Anspruch 2 beansprucht, dadurch gekennzeichnet, dass die fixierte Struktur (16) eine Stange (14), die lösbar an dem Rahmen (15) und quer zu den Drähten (2,3) befestigt ist, und eine Anzahl von Pfosten (15) umfasst, die an der Stange (14) befestigt sind und von ihr vorstehen und die ersten Verbindungselemente bilden.
  4. Anordnung wie in Anspruch 3 beansprucht, dadurch gekennzeichnet, dass die zweiten Verbindungselemente durch eine Anzahl von Stangen (21) gebildet werden, die an der Entwässerungsleiste (9) befestigt sind und den entsprechenden der Pfosten (15) gegenüber liegen.
  5. Anordnung wie in Anspruch 4 beansprucht, dadurch gekennzeichnet, dass sie für jede der Verbindungsanordnungen (22) zwei Paare von Stangenelementen (16) aufweist, die auf gegenüberliegenden Seiten des Pfostens (15) und der Stange (21) angeordnet sind.
  6. Anordnung wie in einem der vorhergehenden Ansprüche beansprucht, dadurch gekennzeichnet, dass die Entwässerungsleiste (9) einen Körper (17) aus Kunststoffmaterial und einen Einsatz (18) umfasst, der aus Keramikmaterial hergestellt ist und in einer gleitenden Weise mit den Drähten (2) zusammenwirkt.
  7. Anordnung wie in einem der vorhergehenden Ansprüche beansprucht, dadurch gekennzeichnet, dass die Betätigungsmittel (25) ein flexibles, rohrförmiges Element umfassen, welches unterhalb der Entwässerungsleiste (9) angeordnet ist und mit einer Druckluftquelle zu verbinden ist.
EP01129550A 2000-12-12 2001-12-11 Entwässerungsleiste für eine Papiermaschine Expired - Lifetime EP1215336B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000TO001149A IT1320857B1 (it) 2000-12-12 2000-12-12 Gruppo controlama per una macchina per la fabbricazione della carta.
ITTO001149 2000-12-12

Publications (3)

Publication Number Publication Date
EP1215336A2 EP1215336A2 (de) 2002-06-19
EP1215336A3 EP1215336A3 (de) 2003-01-08
EP1215336B1 true EP1215336B1 (de) 2005-02-23

Family

ID=11458278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01129550A Expired - Lifetime EP1215336B1 (de) 2000-12-12 2001-12-11 Entwässerungsleiste für eine Papiermaschine

Country Status (5)

Country Link
EP (1) EP1215336B1 (de)
AT (1) ATE289642T1 (de)
DE (1) DE60109015T2 (de)
ES (1) ES2234759T3 (de)
IT (1) IT1320857B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008040020A1 (de) 2008-06-30 2009-12-31 Voith Patent Gmbh Leistenanordnung für eine Maschine zur Herstellung einer Faserstoffbahn
DE102008040021A1 (de) 2008-06-30 2009-12-31 Voith Patent Gmbh Leistenanordnung für eine Maschine zur Herstellung einer Faserstoffbahn
DE102008040032A1 (de) 2008-06-30 2009-12-31 Voith Patent Gmbh Leistenanordnung für eine Maschine zur Herstellung einer Faserstoffbahn
DE102008040016A1 (de) 2008-06-30 2009-12-31 Voith Patent Gmbh Leistenanordnung für eine Maschine zur Herstellung einer Faserstoffbahn
DE102008040025A1 (de) 2008-06-30 2009-12-31 Voith Patent Gmbh Leistenanordnung für eine Maschine zur Herstellung einer Faserstoffbahn

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2370046A (en) 2000-12-15 2002-06-19 Astenjohnson Inc Adjustable resilient blade support
SE526974C2 (sv) * 2004-02-18 2005-11-29 Uddevalla Mek Verkst Ab Listarrangemang för en dubbelvira-formare innefattande en dynamisk bäranordning för motlist
US10246825B2 (en) * 2016-03-17 2019-04-02 Andritz Inc. Supporting mechanism for a papermaking machine dewatering blade
AT519054B1 (de) * 2016-09-01 2018-07-15 Klaus Ing Bartelmuss Vorrichtung zur Verstellung einer Abstreifleiste in einer Anlage zur Erzeugung eines Papierbandes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4107653A1 (de) * 1991-03-09 1992-09-10 Escher Wyss Gmbh Entwaesserungseinrichtung fuer die nasspartie einer papiermaschine
AT400158B (de) * 1993-12-21 1995-10-25 Bartelmuss Klaus Ing Vorrichtung zur einstellung der höhenlage und bzw. oder der winkellage einer dem siebband einer anlage zur papiererzeugung zugeordneten leiste
FI95058C (fi) * 1994-11-16 1995-12-11 Valmet Paper Machinery Inc Paperikoneen vedenpoistolaitteen listasto
FI100811B (fi) * 1997-02-26 1998-02-27 Valmet Corp Paperikoneen vedenpoistolaitteen lista

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008040020A1 (de) 2008-06-30 2009-12-31 Voith Patent Gmbh Leistenanordnung für eine Maschine zur Herstellung einer Faserstoffbahn
DE102008040021A1 (de) 2008-06-30 2009-12-31 Voith Patent Gmbh Leistenanordnung für eine Maschine zur Herstellung einer Faserstoffbahn
DE102008040032A1 (de) 2008-06-30 2009-12-31 Voith Patent Gmbh Leistenanordnung für eine Maschine zur Herstellung einer Faserstoffbahn
DE102008040016A1 (de) 2008-06-30 2009-12-31 Voith Patent Gmbh Leistenanordnung für eine Maschine zur Herstellung einer Faserstoffbahn
DE102008040025A1 (de) 2008-06-30 2009-12-31 Voith Patent Gmbh Leistenanordnung für eine Maschine zur Herstellung einer Faserstoffbahn
US8168042B2 (en) 2008-06-30 2012-05-01 Voith Patent Gmbh Bar arrangement for a machine for the production of a fibrous web

Also Published As

Publication number Publication date
IT1320857B1 (it) 2003-12-10
EP1215336A2 (de) 2002-06-19
ITTO20001149A0 (it) 2000-12-12
DE60109015T2 (de) 2005-07-21
ATE289642T1 (de) 2005-03-15
DE60109015D1 (de) 2005-03-31
EP1215336A3 (de) 2003-01-08
ES2234759T3 (es) 2005-07-01
ITTO20001149A1 (it) 2002-06-12

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