EP2199460B1 - Cadre modulaire pour section de presse - Google Patents

Cadre modulaire pour section de presse Download PDF

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Publication number
EP2199460B1
EP2199460B1 EP20080172563 EP08172563A EP2199460B1 EP 2199460 B1 EP2199460 B1 EP 2199460B1 EP 20080172563 EP20080172563 EP 20080172563 EP 08172563 A EP08172563 A EP 08172563A EP 2199460 B1 EP2199460 B1 EP 2199460B1
Authority
EP
European Patent Office
Prior art keywords
frame
nip
side elements
beams
press section
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
EP20080172563
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German (de)
English (en)
Other versions
EP2199460A1 (fr
Inventor
Jyrki Savela
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 Technologies Oy
Original Assignee
Metso Paper Oy
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 Oy filed Critical Metso Paper Oy
Priority to EP20080172563 priority Critical patent/EP2199460B1/fr
Publication of EP2199460A1 publication Critical patent/EP2199460A1/fr
Application granted granted Critical
Publication of EP2199460B1 publication Critical patent/EP2199460B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D21F3/04—Arrangements thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/001—Wire-changing arrangements

Definitions

  • the invention relates to a frame for a press section.
  • document WO-A- 2006/106178 discloses a press section of a paper machine having a frame which is constructed of beams. More precisely, the frame is constructed of load-bearing beams and support beams which extend between the load-bearing beams from a tending side to a driving side. In the load-bearing beams, there are provided fabric feed devices.
  • Document WO-A- 99/55956 discloses a further press section in a paper machine which is specially constructed in order to facilitate the replacement of the press fabrics.
  • the press section has two separate press nips.
  • a frame part which comprises rectangular side frames on both sides.
  • the side frames of frame parts of different press nips are connected to each other by an upper horizontal beam which is placed above the side frames.
  • the upper horizontal beam operates as a machine-direction cantilever beam so that it is possible to open the side frame of one of the press nips while the upper horizontal beam supports this frame.
  • Document DE 10 2004 046 060 A1 discloses another construction of a frame for press section comprising multiple nips which comprise inclined pairs of nip rolls.
  • the frame comprises one side frame on a driving side and one side frame on the tending side which frames are connected to each other with cross beams and cantilever beams.
  • the side frames are constructed integrally or are constructed of multiple parts which are so connected as if the side frames were integrally formed parts.
  • WO-A-99/55956 discloses a frame having the features according to the preamble of claim 1.
  • the frame for a web forming machine comprises frame side elements, at least one intermediate cross machine direction beam and at least one upper cross machine direction beam.
  • the frame side elements extend in machine direction and comprise a rectangular nip frame module adapted to support an inclined pair of nip rolls and an upper connection beam which is located above the nip frame module and which is connected to the nip frame module.
  • the intermediate cross machine direction beams connect the nip frame modules.
  • the upper cross machine direction beam connects the upper connection beams.
  • insertion units are provided in the rectangular nip frame modules.
  • the frame according to the invention is not a cantilevered frame in cross machine direction. This arrangement saves a lot of space for rolls and felts between the side frames.
  • the frame side elements are constructed with straight beams having a constant profile.
  • beams with constant profile has the advantage that the construction is simplified.
  • the frame is constructed of U-shaped frame parts or if the frame consists of two U-shaped frame parts which are arranged opposite to each other.
  • the beams of the frame side elements are arranged vertically and horizontally to form the rectangular nip frame module. With such an arrangement of the beams, a further simplification is achieved.
  • the frame further comprises a support arm for supporting an upper nip roll.
  • the nip frame module comprises at least one guide hole for linearly guiding the support arm and the upper nip roll between a machine running position and a maintenance position.
  • the support arm of the upper nip roll has at least a two point support in the machine running position and a three point support in the maintenance position.
  • the upper nip roll can be securely held in the maintenance position.
  • the frame further comprises a lower connection beam adapted to connect adjacent frame side elements to each other.
  • a lower connection beam adapted to connect adjacent frame side elements to each other.
  • the lower connection beam extends in machine direction and is fixed on the frame side elements at a position corresponding to nip level or upper nip roll.
  • a press section of a paper machine comprises a frame as described above and an inclined pair of nip rolls defining a press nip.
  • the lower nip roll is supported on a base beam which extends in a machine direction from both sides.
  • the press section comprises at least two inclined pairs of nip rolls, a corresponding number of nip frame modules on each side of the nip rolls and at least one transfer suction box which is installed between adjacent nip frame modules.
  • the transfer suction box not necessarily has to be installed between adjacent nip frame modules.
  • the press section further comprises guide rolls between the frame side elements and if the guide rolls are sill rolls.
  • Fig. 1 shows a side view of a press section of a web forming machine comprising a frame according to an embodiment of the present invention.
  • Fig. 2 is another side view showing a modification of the frame of the press section shown in fig. 1 .
  • the press section shown in Fig. 1 comprises two serially arranged press portions each having an inclined pair of nip rolls 11 and 12 which are supported by frames 1 according to the invention, respectively.
  • Each of these frames 1 is mainly composed of two frame side elements 2 which are provided on the driving side and the tending side of the press section, respectively.
  • the frame side elements 2 extend in machine direction and are connected to each other by means of intermediate cross machine direction beams 3a and upper cross machine direction beams 3b.
  • the intermediate cross machine direction beams 3a and the upper cross machine direction beams 3b only connect the frame side elements so that the beams are no cantilever beams.
  • the beams are supported on the frame side elements such that they only extend between the frame side elements and bear forces in the longitudinal directions of the beams.
  • a lower cross machine direction beam 14 which is provided under the intermediate cross machine direction beams 3a and the upper cross machine direction beams 3b between the frame side elements 2 at a lower portion of the frame side elements 2.
  • the lower cross machine direction beam 14 is stronger than the intermediate cross machine direction beam and the upper cross machine direction beam because it serves for changing the lower nip roll and also for frame support. More precisely, there is a rail provided on the lower cross machine direction beam which simplifies moving the lower nip roll 11.
  • the frame side elements 2 are constructed of nip frame modules 21 and upper connection beams 22 which are located above the nip frame modules 21.
  • the nip frame modules 21 are rectangular and are made up of straight beams having a constant profile.
  • the nip frame modules in Fig. 1 are constructed with vertically and horizontally arranged straight beams which are connected to each other in a suitable manner.
  • conventional joining techniques such as welding, screwing etc. can be used.
  • joining the beams it is only important to use a joining technique which is suitable for bearing the loads which exist in press sections.
  • such reinforcement is realized by means of triangular supports 15 which are fixed in the corners between two adjacent beams.
  • the straight beams which are used for the nip frame modules 2 in this embodiment have a constant profile.
  • different forms can be used including e.g. a U-shape, T-shape, double-T-shape or the like.
  • any profile form which is suitable for providing sufficient (buckling, bending) strength can be used.
  • the rectangular nip frame module 21 comprises a machine direction base beam which is provided at the lower portion of the rectangular nip frame module 21.
  • This machine direction base beam is constructed to be stronger than the other beams of the nip frame module because the machine direction base beam has to bear more load than the beams located above it. With such a construction, the machine direction base beam can reliably support the other elements of the frame.
  • insertion units 4 are provided for enabling a change of a conveying means which carries the web through the press nip.
  • a conveying means can be a felt, a fabric or a belt made of any other suitable material like e.g. a woven material, a polymer material or a metal material.
  • the beams of the frame define two U-shaped frame parts which are most suitable for integrating insertion units between them.
  • the nip frame module 21 of each frame side element 2 can be built up with an upper U-shaped frame part defined by three beams and a lower U-shaped frame part which is also defined by three beams.
  • U-shaped frame parts are so arranged that the open sides of the U-shaped face each other and that the ends of the beams on the open side are connected to each other with the insertion units arranged between them.
  • insertion units are the most preferable way for enabling an easy change of the conveying means because the upper parts of the frame do not have to be supported by any further means.
  • the press section shown in Fig. 1 further comprises a support arm 23 for supporting the upper nip roll 12.
  • This support arm 23 is provided for securely supporting the upper nip roll 12 during a change of the conveying means.
  • the support arm 23 is attached to the nip frame module 21 in such a manner that it is movable from a machine running position to a maintenance position.
  • the support arm 23 is linearly guided by a guide hole (an elongated hole or slit).
  • the support arm 23 can be guided in any other manner as long as the upper nip roll 12 can be moved in the maintenance position which is suitable for changing the conveying means.
  • the support arm 23 In the maintenance position, the support arm 23 is preferably supported at three points. In contrast thereto, when the support arm 23 is in the machine running position, it is sufficient if the support arm 23 is supported at two points.
  • At least one transfer suction box Z can be provided in order to guide the web from one press nip to another.
  • a suction roll can be used instead of a transfer suction box although the use of a transfer suction box provides advantages with respect to the installability. More precisely, the use of a suction roll may enlarge the whole construction because it needs more installation space than transfer suction boxes.
  • some of the rolls X used in the press section are sill rolls X which are supported on a sill or shelf on an inner side of the frame side elements. With such a construction, the rolls are supported between the frame side elements.
  • Fig. 2 describes another construction of a press section having the frame according to the invention. Similar parts as those shown in Fig. 1 are designated with the same reference signs.
  • Fig. 2 differs from that of Fig. 1 in that a lower connection beam 16 is provided which connects adjacent frame side elements 2 or nip frame modules 21. Such an arrangement further provides stability to the frame structure. Also, the support arm 23 which is linearly guided in Fig. 1 is supported by a pivot mechanism which is able to shift the upper nip roll 12 into the maintenance position.
  • the triangular supports 15 in Fig. 1 which are used for reinforcing the connecting portion between adjacent beams are integrally formed with the beams. This provides additional stability in the frame structure.
  • the described frame layout is not limited to the use in a press section having two serially arranged press nips. Rather, the frame layout can be used for multiple press nips or only one single press nip by use of a corresponding number of nip frame modules. It is preferable if in case of multiple nips and, consequently, multiple nip frame modules, frame side elements are used having the same dimension. However, it is also possible to use nip frame modules having different dimensions. Also, the above described frame construction can be suitably used in other sections of a web forming machine.
  • web forming machine is meant to include particularly paper machines and (card) board machines.

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  • Paper (AREA)

Claims (15)

  1. Cadre (1) pour une machine de formation de bande, comprenant
    des éléments (2) côté cadre s'étendant dans la direction de la machine où les éléments (2) côté cadre comprennent chacun un module rectangulaire (21) de cadre de pincement adapté pour supporter une paire inclinée de rouleaux pinceurs (11, 12) et une poutrelle de liaison supérieure (22) située au-dessus des modules (21) de cadre de pincement et reliée à ces derniers ;
    au moins une poutrelle intermédiaire (3a) dans la direction transversale de la machine reliant les modules (21) de cadre de pincement ;
    au moins une poutrelle supérieure (3b) dans la direction transversale de la machine reliant les poutrelles de liaison supérieures (22) ; et
    des unités d'insertion (4),
    caractérisé en ce que
    lesdites unités d'insertion (4) sont pourvues dans les modules rectangulaires (21) de cadre de pincement et permettent un changement facile d'un moyen d'acheminement sans supporter les parties supérieures du cadre par tout autre moyen.
  2. Cadre (1) selon la revendication 1, dans lequel les éléments (2) côté cadre sont constitués de poutrelles droites ayant un profil constant.
  3. Cadre (1) selon la revendication 1 ou 2, dans lequel le cadre est constitué de parties de cadre en forme de U.
  4. Cadre (1) selon la revendication 2, dans lequel le cadre est constitué de deux parties de cadre en forme de U qui sont agencées l'une en face de l'autre.
  5. Cadre (1) selon l'une des revendications 2 à 4, dans lequel les poutrelles des éléments (2) côté cadre sont agencées verticalement et horizontalement pour former ledit module rectangulaire de cadre de pincement.
  6. Cadre (1) selon l'une des revendications précédentes, comprenant en outre un bras de support (23) pour supporter un rouleau pinceur supérieur (12).
  7. Cadre (1) selon la revendication 6, dans lequel le module (21) de cadre de pincement comprend au moins un trou de guidage pour guider linéairement le bras de support (23) et le rouleau pinceur supérieur (12) entre une position de marche de la machine et une position de maintenance.
  8. Cadre (1) selon la revendication 7, dans lequel le bras de support (23) comporte au moins un support à deux points dans la position de marche de la machine et un support à trois points dans la position de maintenance.
  9. Cadre (1) selon l'une des revendications précédentes, comprenant en outre une poutrelle de liaison inférieure adaptée pour relier des éléments adjacents (2) côté cadre entre eux.
  10. Cadre (1) selon la revendication 9, dans lequel la poutrelle de liaison inférieure s'étend dans la direction de la machine et est fixée sur les éléments (2) côté cadre à une position correspondant à un niveau de pincement ou au rouleau pinceur supérieur.
  11. Section de presse d'une machine à papier, comprenant
    un cadre (1) selon l'une des revendications précédentes, et
    une paire inclinée de rouleaux pinceurs (11, 12) définissant un pincement de presse.
  12. Section de presse selon la revendication 11, dans laquelle le rouleau pinceur inférieur (11, 12) est supporté sur une poutrelle de base (13) dans la direction de la machine des deux côtés.
  13. Section de presse selon la revendication 11 ou 12, comprenant au moins deux paires inclinées de rouleaux pinceurs (11, 12), un nombre correspondant de modules (21) de cadre de pincement sur chaque côté des rouleaux pinceurs (11, 12) et au moins une caisse aspirante de transfert (Z) qui est installée entre des modules adjacents (21) de cadre de pincement.
  14. Section de presse selon la revendication 12, comprenant en outre des rouleaux-guides (X) entre les éléments (2) côté cadre.
  15. Section de presse selon la revendication 14, dans laquelle les rouleaux-guides (X) sont des rouleaux d'appui.
EP20080172563 2008-12-22 2008-12-22 Cadre modulaire pour section de presse Active EP2199460B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20080172563 EP2199460B1 (fr) 2008-12-22 2008-12-22 Cadre modulaire pour section de presse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20080172563 EP2199460B1 (fr) 2008-12-22 2008-12-22 Cadre modulaire pour section de presse

Publications (2)

Publication Number Publication Date
EP2199460A1 EP2199460A1 (fr) 2010-06-23
EP2199460B1 true EP2199460B1 (fr) 2013-07-17

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ID=40756658

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080172563 Active EP2199460B1 (fr) 2008-12-22 2008-12-22 Cadre modulaire pour section de presse

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EP (1) EP2199460B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20165368A (fi) * 2016-04-28 2017-10-29 Valmet Technologies Inc Kuiturainakoneen tukirunkorakenne ja kuiturainakone

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3600273A (en) * 1968-09-27 1971-08-17 Black Clawson Co Paper machine press section
FI104097B (fi) 1998-04-28 1999-11-15 Valmet Corp Paperikoneen puristinosa ja menetelmä sen puristuskudosten vaihdossa
DE102004046060A1 (de) 2004-09-21 2006-03-23 Voith Paper Patent Gmbh Maschine zum Erzeugen einer Bahn aus Papier oder Karton oder einem anderen flächigen Material
FI117397B (fi) 2005-04-05 2006-09-29 Metso Paper Inc Menetelmä ja laite kudoksen vaihtamiseksi paperi- tai kartonkikoneessa

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EP2199460A1 (fr) 2010-06-23

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