EP1058748B1 - Presse a sabot pour machine a papier ou a carton - Google Patents

Presse a sabot pour machine a papier ou a carton Download PDF

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Publication number
EP1058748B1
EP1058748B1 EP98946770A EP98946770A EP1058748B1 EP 1058748 B1 EP1058748 B1 EP 1058748B1 EP 98946770 A EP98946770 A EP 98946770A EP 98946770 A EP98946770 A EP 98946770A EP 1058748 B1 EP1058748 B1 EP 1058748B1
Authority
EP
European Patent Office
Prior art keywords
shoe
press
pipe
press shoe
hydrostatic
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
EP98946770A
Other languages
German (de)
English (en)
Other versions
EP1058748A1 (fr
Inventor
Erik Brox
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.)
Valmet AB
Original Assignee
Metso Paper Karlstad AB
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 Metso Paper Karlstad AB filed Critical Metso Paper Karlstad AB
Publication of EP1058748A1 publication Critical patent/EP1058748A1/fr
Application granted granted Critical
Publication of EP1058748B1 publication Critical patent/EP1058748B1/fr
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
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses

Definitions

  • the present invention relates to a shoe press for paper/board machines.
  • Shoe presses generally comprise a press shoe and a counter roll, which components form an extended nip between themselves for treating, e.g. dewatering in the press section of the paper machine, a paper or cardboard web, which together with a circulated flexible belt, in the press section of the paper machine in most cases referred to as press belt, runs through the extended nip.
  • Shoe presses generally also comprise pressure-actuatable piston-and-cylinder units which are distributed along the press shoe (in one or more rows in the longitudinal direction of the press shoe) and adapted to press the press shoe against the counter roll (below referred to as loading cylinders), see e.g. EP 345 501 B2; DE-195 15 832 C1 and DE-44 09 316 C1.
  • shoe presses also comprise compartments arranged in the press shoe surface facing the counter roll and, in operation, containing fluid under hydrostatic pressure for lubricating the belt, see e.g. EP-345 501 B2.
  • shoe presses may comprise a compartment or pressure chamber between each loading cylinder and the press shoe, which may be open towards the press shoe and in operation contains fluid under hydrostatic pressure.
  • the pressure chamber acts to transmit the pressure of the loading cylinder to the press shoe for pressurising thereof and to form a hydraulic fluid pad, see e.g. DE-195 15 832 C1.
  • the above-mentioned loading cylinders, compartments/chambers thus require access to hydraulic fluid.
  • the compartment for hydrostatic pressure according to EP-345 501 B2 is pressurised by hydraulic fluid through a duct which is common to all the pockets and is horizontally bored in the frame system of the shoe press in the longitudinal direction of the shoe press, and bored ducts with a throttle between these and each compartment.
  • the throttle serves the purpose of making the pressure condition of each compartment essentially independent of the pressure conditions of the other compartments.
  • the loading cylinders are pressurised by hydraulic fluid via ducts bored in the frame system of the shoe press.
  • shoe press according to the invention has the characteristic features of claim 1 and the advantageous features of the dependent claims:
  • the hydrostatic compartments 101 which are per se known and arranged in a row in the upper side of the press shoe 200 are each by means of a duct 102 bored in the press shoe 200 connected to a sectional pipe 103 which is releasably attached to one longitudinal side edge 104 (in this case, the inlet side) of the press shoe by means of screws 105 which engage in threaded holes 105' in the press shoe.
  • the duct of the sectional pipe 103 which is intended for hydraulic fluid supply, is designated 106, and the attachment of the sectional pipe to the press shoe is carried out by means of sectional pipe flanges 107.
  • the duct 106 is connected to the ducts 102 by means of a throttle 108 each, which is formed of a hole in the wall of the sectional pipe 103.
  • the screws 105 thus permit removal of the sectional pipe 103 from the press shoe 200, and mounting of a different sectional pipe 103 on the press shoe 200, having a different throttle 108/diameter or made of a different material, thus is possible.
  • the working chamber 201 of the loading cylinders 210 is also supplied with hydraulic fluid from a sectional pipe 203 containing a duct 206, which is connected with ducts 202, which are bored in the press shoe 200 and which extend to their working chambers 201.
  • the sectional pipe 203 is releasably attached to one longitudinal side edge 204 (in this case, the outlet side) of the press shoe 200 by means of screws 205.
  • the wall of the sectional pipe 203 has a bored hole (throttle) 208 for each duct 202.
  • the screws 205 are screwed into sectional pipe flanges 207 and mating threaded holes 205' in the press shoe.
  • the counter roll, the paper/cardboard web and the circulated belt are designated 312, W and 311, respectively, and the shoe press frame is designated 309.
  • N designates the extended nip of the shoe press
  • F designates a press felt, which is present if the shoe press is to be inserted in the press section of the paper machine.
  • a hydrostatic compartment or pressure chamber 211 between the frame 309 and the loading cylinder 210, more specifically between the piston 210A of the loading cylinder and the frame.
  • This pressure chamber 211 communicates with the working chamber 201 via a duct 212 with a throttle 213.
  • the duct 206 supplies also the pressure chamber 211 with hydraulic fluid.
  • a sealing O-ring between the piston 210A and the cylinder of the loading cylinder, formed of a recess 210B in the underside of the press shoe, is designated 214.
  • Fig. 2 illustrates the inventive principle applied to the supplying of hydraulic fluid to a pressure chamber 301 between a loading cylinder 310 and the press shoe 300.
  • the releasable connection between the sectional pipe 303 and the press shoe 300 is illustrated by the screw/screw hole joints 305, 305'.
  • reference numerals 325; 326; 327; 330; 340; 340'; 350; 309 and 380 relate to the working chamber of the loading cylinder 310; the hydraulic fluid supply of this chamber (a common horizontal duct 326 and separate vertical ducts 327); the piston in the loading cylinder 310; the cylinder part in the loading cylinder 310; an annular boundary surface on the cylinder part 340 for the pressure chamber 301; screws for attaching the piston to a horizontal supporting beam associated with the frame system of the shoe press and an O-ring seal between the cylinder part 340 and the piston 330 of the loading cylinder.
  • Reference numeral 336 designates a gap between the side of the press shoe 300 facing the cylinder part 340 of the loading cylinder 310 and the opposing side of the cylinder part 340, to which gap, in operation of the press shoe, hydraulic fluid can be supplied via the duct 302, the sectional pipe 303 and the hydrostatic compartment 301, such that the press shoe 300 is floatingly suspended, which prevents jamming. This is illustrated by arrows.
  • one and same sectional pipe 403 which like in the embodiments above is attached to one longitudinal side edge 404 (in this case, the inlet side) of the press shoe 400 by means of screws/screw hole joints 405, 405', supplies hydraulic fluid both to hydrostatic compartments 401 between a circulated flexible belt (press belt) and a press shoe 400, and to pressure chambers 301 between loading cylinders 410 and a press shoe 400.
  • the supply of hydraulic fluid to the working chamber 425 of the loading cylinders 410 is carried out by means of a horizontal duct 426 (which is common to all loading cylinders) formed in the piston 410B of the these cylinders, and a vertical duct 427 extending from the horizontal duct 426.
  • the cylinder part of the loading cylinders is designated 410A.
  • the piston is attached to the supporting beam by means of screws 450.
  • An O-seal between the cylinder 410A and the piston 410B is designated 480.
  • An O-seal for the pressure chamber 301 is designated 430.
  • sectional pipes for supplying hydraulic fluid are releasably attached to one or both longitudinal side edges of the press shoe
  • a sectional pipe 503 for supplying hydraulic fluid is, in the embodiment of the invention according to Fig. 4, releasably attached in a recess 520 in the side of the press shoe 500 facing the loading cylinder.
  • the sectional pipe 503 contains two ducts or bores 506, 506', the duct 506 extending, via a throttle 508 in the sectional pipe 503 and a duct 502 in the press shoe 500, to a hydrostatic compartment 501 in the side of the press shoe facing the counter roll 312, while the other duct 506' extends to a pressure chamber 511 between the press shoe 500 and the loading cylinder 510, via a throttle 508'.
  • the pressure chamber 511 communicates with the working chamber 521 of the loading cylinder 510 via an opening 512 in a sleeve 510C connected to the cylinder part 510A (in which the piston 510B of the loading cylinder is received) of the loading cylinder 510, a screw 513 being fixed in the piston 510B.
  • the screw has a head 514 which throttles the opening 512 when the loading cylinder has reached its maximum stroke.
  • the sectional pipe 503 has flanges 507, by means of which it is releasably screwed (screw 505, screw hole 505') into the press shoe 500.
  • the supply of hydraulic fluid to the sectional pipe/pipes 103, 203, 403, 503 can be effected via one end or both ends thereof.
  • the sectional pipes 103, 203, 403, 503 are preferably made of the same material as the press shoe, preferably aluminium (alloy), the sectional pipes advantageously being extruded.
  • a hydraulic fluid feed pipe to the sectional pipe 403 in Fig. 3 is designated 411.
  • sectional pipes need not be fixed to the press shoe by means of screw joints, as described above.
  • the fixing methods/means may vary within the scope of the invention; for instance, flanges in the sectional pipe may engage in grooves formed in the press shoe.
  • a different fixing arrangement consists of screws which together with a washer are screwed into the press shoe outside the pipe flanges, e.g. 207, such that the screw head clamps, via the washer, the pipe flanges against the press shoe.
  • the arrangement is advantageous since it allows a certain relative motion of pipe and press shoe, which may be necessary if, for instance, the pipe is selected to be made of a material other than that of the press shoe (temperature aspects).
  • the straight sectional pipes described above are common to all hydrostatic compartments/pressure chambers and loading cylinders, if more than one, i.e. the sectional pipes supply the compartments/pressure chambers/loading cylinders with hydraulic fluid via a bore/throttle/duct each.
  • the inventive shoe press is applicable also to calendering operations in a paper or board machine.

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  • Paper (AREA)

Claims (11)

  1. Presse à sabot pour machine à papier ou à carton, comprenant :
    un sabot de presse (200 ; 300 ; 400 ; 500),
    un contre-rouleau (312),
    le sabot de presse et le contre-rouleau formant entre eux-mêmes une emprise étendue (N) pour une nappe de papier ou de carton (W) et une courroie flexible en circulation (311),
    au moins un cylindre de chargement hydraulique (210 ; 310 ; 410 ; 510) pour presser le sabot de presse contre le contre-rouleau,
    un premier et/ou un deuxième compartiment hydrostatique (101 ; 201 ; 301 ; 401 ; 211 ; 501 ; 511) agencé(s) dans le côté du sabot de presse tourné vers le contre-rouleau et entre le côté opposé du sabot de presse et les cylindres de chargement, respectivement, et adapté(s) à être alimenté(s) avec un fluide hydraulique, caractérisée en ce que :
    au moins un tube (103 ; 203 ; 303 ; 403 ; 503) pour l'alimentation dudit fluide hydraulique est attaché de façon libérable sur un côté (104 ; 204 ; 304 ; 404) du sabot de presse dans la direction longitudinale de celui-ci,
    ledit tube ayant des trous traversants (108 ; 208 ; 308 ; 408 ; 508 ; 508') dans sa paroi,
    des conduits (102 ; 202 ; 302 ; 402 ; 402' ; 402" ; 502) communiquant chacun avec un trou à l'une de leurs extrémités sont formés dans le sabot de presse, et
    lesdits conduits s'ouvrant chacun à leur autre extrémité dans une chambre de travail (201 ; 521) dans le cylindre de chargement et/ou dans ledit premier compartiment hydrostatique et/ou dans ledit deuxième compartiment hydrostatique.
  2. Presse à sabot selon la revendication 1, caractérisée en ce que le tube est attaché de façon libérable sur le sabot sur un bord latéral longitudinal du sabot de presse.
  3. Presse à sabot selon la revendication 1, caractérisée en ce que le tube est attaché de façon libérable sur le sabot de presse intégré dans le côté du sabot de presse tourné vers le cylindre de chargement.
  4. Presse à sabot selon l'une quelconque des revendications 1 à 3, caractérisée en ce que les trous du tube ont la forme d'étranglements.
  5. Presse à sabot selon l'une quelconque des revendications 1 à 4, caractérisée en ce que le conduit dans le sabot de presse connecte lesdits trous du tube au moins avec un compartiment hydrostatique dans le côté du sabot de presse tourné vers le contre-rouleau.
  6. Presse à sabot selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le conduit dans le sabot de presse connecte lesdits trous du tube au moins avec une poche hydrostatique entre les cylindres de chargement et le sabot de presse.
  7. Presse à sabot selon l'une quelconque des revendications 1 à 6, caractérisée en ce que le conduit dans le sabot de presse connecte des trous du tube au moins avec les chambres de travail des cylindres de chargement.
  8. Presse à sabot selon l'une quelconque des revendications 1 à 7, caractérisée en ce que le tube en section (503) comporte deux conduits ou perçages (506 ; 506'), l'un communiquant avec les compartiments hydrostatiques dans le côté du sabot de presse tourné vers le contre-rouleau et l'autre communiquant avec les compartiments hydrostatiques entre les cylindres de chargement et le sabot de presse, le tube étant intégré dans la face inférieure du sabot de presse.
  9. Presse à sabot selon l'une quelconque des revendications 1 à 8, caractérisée en ce que le tube est réalisé avec le même matériau que le sabot de presse, de référence de l'aluminium (alliage).
  10. Presse à sabot selon l'une quelconque des revendications 1 à 9, caractérisée en ce que le tube comporte des brides pour attacher le tube sur le sabot de presse au moyen de vis et de trous taraudés dans le sabot de presse.
  11. Presse à sabot selon l'une quelconque des revendications 1 à 9, caractérisée en ce que le tube comporte des brides pour attacher le tube sur le sabot de presse au moyen de vis et de rondelles, les trous de vis dans le sabot de presse étant situés à l'extérieur des brides, et les têtes des vis pinçant, via les rondelles, les brides contre le sabot de presse.
EP98946770A 1997-09-30 1998-09-30 Presse a sabot pour machine a papier ou a carton Expired - Lifetime EP1058748B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9703571A SE510551C2 (sv) 1997-09-30 1997-09-30 Skopress för pappers- eller kartongmaskiner
SE9703571 1997-09-30
PCT/SE1998/001759 WO1999016968A1 (fr) 1997-09-30 1998-09-30 Presse a sabot pour machine a papier ou a carton

Publications (2)

Publication Number Publication Date
EP1058748A1 EP1058748A1 (fr) 2000-12-13
EP1058748B1 true EP1058748B1 (fr) 2003-05-02

Family

ID=20408466

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98946770A Expired - Lifetime EP1058748B1 (fr) 1997-09-30 1998-09-30 Presse a sabot pour machine a papier ou a carton

Country Status (8)

Country Link
EP (1) EP1058748B1 (fr)
JP (1) JP2001518574A (fr)
AT (1) ATE239129T1 (fr)
BR (1) BR9812575A (fr)
CA (1) CA2303539C (fr)
DE (1) DE69814171T2 (fr)
SE (1) SE510551C2 (fr)
WO (1) WO1999016968A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI19992824A (fi) * 1999-12-30 2001-07-01 Valmet Karlstad Ab Laite nipin muodostamiseksi
FI5442U1 (fi) * 2002-04-03 2002-07-22 Metso Paper Oy Paperi-/kartonkikoneen pitkänippipuristin
US8871059B2 (en) * 2012-02-16 2014-10-28 International Paper Company Methods and apparatus for forming fluff pulp sheets

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE461171C (sv) * 1988-05-25 1992-08-17 Valmet Paper Machinery Inc Press med laangt nyp foer pappers- eller kartongmaskiner
DE19515832C1 (de) * 1995-04-29 1996-05-02 Voith Sulzer Papiermasch Gmbh Schuhpreßwalze für eine Papiermaschine

Also Published As

Publication number Publication date
JP2001518574A (ja) 2001-10-16
WO1999016968A1 (fr) 1999-04-08
DE69814171D1 (de) 2003-06-05
DE69814171T2 (de) 2004-04-08
SE9703571L (sv) 1999-03-31
EP1058748A1 (fr) 2000-12-13
ATE239129T1 (de) 2003-05-15
SE9703571D0 (sv) 1997-09-30
CA2303539C (fr) 2004-09-21
BR9812575A (pt) 2000-07-25
CA2303539A1 (fr) 1999-04-08
SE510551C2 (sv) 1999-05-31

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