EP2518211B1 - Canalisation de distribution en relation avec la caisse d'arrivée d'une machine à papier - Google Patents

Canalisation de distribution en relation avec la caisse d'arrivée d'une machine à papier Download PDF

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Publication number
EP2518211B1
EP2518211B1 EP12163696.3A EP12163696A EP2518211B1 EP 2518211 B1 EP2518211 B1 EP 2518211B1 EP 12163696 A EP12163696 A EP 12163696A EP 2518211 B1 EP2518211 B1 EP 2518211B1
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EP
European Patent Office
Prior art keywords
headbox
distribution
modular
channeling
piece
Prior art date
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Active
Application number
EP12163696.3A
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German (de)
English (en)
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EP2518211A1 (fr
Inventor
Erkka Nieminen
Harri Kronholm
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.)
Bellmer Vaahto Paper Machinery Oy
Original Assignee
Vaatho Paper Technology Oy
Vaahto Paper Technology Oy
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Publication of EP2518211A1 publication Critical patent/EP2518211A1/fr
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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
    • D21F1/02—Head boxes of Fourdrinier machines
    • 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
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/022—Means for injecting material into flow within the headbox
    • 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
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/024—Details of the feed chamber
    • 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
    • D21F1/08—Regulating consistency

Definitions

  • the object of the invention is a headbox of a paper machine comprising a distribution channeling for stock suspension as defined in the preamble of claim 1.
  • distribution channelings that are in connection with a headbox of a paper machine, the purpose of which distribution channelings is to feed the stock suspension fed from an inlet pipe to the distribution channeling onwards via the distribution channeling further into possible intermediate spaces and finally into the slice channel which feeds the stock onto the wire.
  • Solutions according to prior art have certain drawbacks.
  • a problem in solutions according to prior art is that since the distribution channeling is formed in one plate-shaped piece, which can also be of a different material than the headbox, managing the thermal expansion of it is awkward when the temperature of the stock varies.
  • Document WO 97/48851 A1 discloses an equipment for combining a dilution flow with the stock flow passed out of the inlet header in a paper/board machine.
  • the equipment comprises dilution flow ducts through which the dilution flow is passed to the desired location across the width of the headbox of the paper/board machine so as to regulate the basis weight of the paper/board web to the desired level.
  • the dilution flow duct is constructed in such a way in its final end that it becomes narrower towards its end. Branch ducts are placed in the area of said narrowing, out of which branch ducts the dilution flow is passed into the system of pipes, in which the dilution flow is combined with the stock flow passed out of the inlet header.
  • WO 2008/105714 A1 discloses a structural element for a functional member in a headbox of a web-manufacturing machine, the structural element comprising an integral block comprising therein a plurality of channels defining flow channels for a paper stock, said stock flow channels extending through the integral block from a first upstream end to a second downstream end of the block.
  • the structural element comprises at least one gap-forming element which is arranged to ensure a gap of a predetermined width between the block of the structural element and a neighbouring element.
  • the aim of the present invention is to achieve a new type of solution, with which the problems occurring in prior-art solutions can be avoided.
  • the solution according to the invention is characterized by what is disclosed in the characterization part of the independent claim 1. Additionally, the solution according to the invention is characterized by what is disclosed in the dependent claims 2-17.
  • the distribution channels are formed into modular pieces, between which is an intermediate space from which diluting fluid can be fed into a distribution channel, the input of diluting fluid is therefore simple, and in the second place the modular pieces can easily be detached from the headbox and if necessary replaced.
  • Another advantage of the invention is that it is durable, easy to fabricate and implement, and it can be used in headboxes in which diluting water is used or in which diluting water is not used for diluting the stock suspension.
  • the invention relates to distribution channeling 4 for stock suspension, said distribution channeling being in connection with the headbox 1 of a paper machine, which distribution channeling is fed with at least one transverse input channel 9, such as an inlet pipe ( Fig. 1c ), forming a feed chamber for stock suspension.
  • the inlet pipe is marked with the reference number 10.
  • the cross-sectional area of flow of the input channel narrows or remains constant in the transverse direction of the headbox (in the flow direction of the stock); in the solution according to Fig. 1c a narrowing input channel is presented.
  • the shape of the input channel can have an effect on the distribution of the stock suspension when it goes into the distribution channeling 4 via a piece 7, in form of a perforated plate, comprising holes or apertures 8.
  • a second piece comprising holes or apertures is described with the reference number 7', which piece is fitted into the headbox after the modular pieces.
  • the distribution channeling 4 feeds stock suspension into an intermediate chamber 5 and onwards from the intermediate chamber to the slice channel 5' of a paper machine.
  • the distribution channeling 4 is distribution channeling formed from one or more modular pieces 2 and is fitted to the headbox after the input channel, and one or more distribution channels 3, such as a hole, for the stock suspension flowing through a modular piece are formed in the modular piece 2.
  • a modular piece can comprise a number of distribution channels one above the other or side by side; in Figs. 1a and 1b a solution is described wherein each modular piece comprises a number of distribution channels one above another.
  • the modular pieces 2 are placed at a desired distance apart from each other, in which case a gap remains between them, and the magnitude of the gap depends on each target of application.
  • diluting fluid such as water
  • a distribution channel this is presented e.g. in Fig. 10a .
  • the modular pieces can comprise grooves 11' and/or protrusions 11, which protrusions (or grooves) can be of the desired lengths and shapes such as e.g. rectangular in cross-section (i.e. as viewed from the ends), with which the modular pieces can be fixed to the headbox, because the frame 1' of the headbox correspondingly comprises protrusions and/or grooves 6 for fixing the modular pieces to the frame 1'.
  • the grooves or protrusions can be the whole length of a modular piece (machine direction length), but they can also be shorter.
  • Figs. 2a-4d present modular pieces from different perspectives, such that a modular piece 2, comprising distribution channels 3, and elongated protrusions 11 on the edges, is seen in Fig. 2a, and Figs. 2b and 2c present the modular piece 2 from different perspectives, and the modular piece as viewed from the ends is seen in Figs. 2d and 2e , and from the figure it can be seen that the distribution channel comprises a widening inside it (or in other words the distribution channel widens, i.e. its diameter increases), because the outlet aperture 3' is larger in diameter than the second aperture, i.e. the input aperture 3, of the distribution channel.
  • Figs.3a-3d present a type of modular piece, which does not have any grooves or protrusions.
  • the modular piece presented by Figs. 4a-4d has grooves 11' formed in its edges.
  • the widenings widening of the flow cross-section
  • Figs.5a-6c present from different perspectives a number of modular pieces placed side by side, said modular pieces having a number of distribution channels 3 (the distribution channels are widening, because the outlet aperture 3' is larger than the mouth of the distribution channel), such that the modular pieces presented in Figs. 5a-5c do not have any grooves or protrusions on the edges.
  • a solution is also conceivable wherein the modular pieces 2 are placed in the headbox also one above the other and at the same time side by side, but this is not presented in the figures.
  • Figs. 6a-6c present from different perspectives modular pieces, such that in Fig. 6a , which is a cross-sectional sketch, distribution channels 3 are seen in which widenings 3" are formed, and a space 13 (interspace) remains between the distribution channels, into which space diluting fluid (e.g. water) can be fed, which is let from the space 13 onwards along the input hole 12 into the distribution channel 3 (or into the outlet aperture 3' of the distribution channel or into the proximity of said aperture as in the figure).
  • space diluting fluid e.g. water
  • Fig. 6b it is seen that the modular pieces are separate from each other (the modular pieces are at a distance from each other) and between them remains the aforementioned interspace 13.
  • Fig. 6c further presents a sectional drawing, in which the input hole 12 formed in a distribution channel is seen.
  • Figs. 7a-7e present from different perspectives a modular piece, wherein the input holes 12 for diluting fluid in Fig. 7a are formed (near the inlet aperture 3 of the distribution channel) before the widening 3'' into the distribution channel 3 and correspondingly the input holes in Fig, 7b are formed in the other end of the distribution channel 3, in the inlet aperture 3.
  • the placement of the input hole can be that desired, other than what is presented in the figures, e.g. near the input aperture or outlet aperture or between them.
  • the apertures 3 and 3' can be of the same size, 3 can be smaller in diameter than 3', or 3 can be larger in diameter than 3'.
  • 3 '' is presented as a widening, but it can also be a narrowing.
  • the apertures 3 and 3' can be round, rectangular, polygonal, oval, et cetera, the shape of them is not per se limited, but instead it depends on each application.
  • the cross-section of an aperture (both the basic shape and the size/area) can over the length of a modular piece change a number of times (not only just one widening/narrowing). The changes can occur stepwise or steplessly.
  • the cross-section of the apertures 3 and 3' made in the modules can be a different size at the different ends of the input channel 9/input pipe 10, i.e. if a narrowing cross-section of an input channel 9 is not optimally dimensioned from the viewpoint of the distribution of the flow of the headbox, the headbox can be provided with types of modular pieces 2 having holes of a size that rectifies the conical input channel 9 causing the aforementioned distribution error. In this case holes differing from each other in relation to diameter/area, i.e. different modules, are placed on one side of the headbox than those on the other.
  • Fig. 8 contains by way of illustration a number of modular pieces 2 fitted to a headbox 1, as viewed from the machine direction.
  • Figs. 9a-9c present from different perspectives a modular piece 2 and the interspace 13 is seen from the figure, from which interspace diluting fluid can be fed into the distribution channel via an input hole 12.
  • Fig. 10 presents a cross-sectional sketch of a modular piece 2, and in it the distribution channel 3 and the edge 16 of the widening is seen.
  • the outlet aperture is marked with the reference number 3'.
  • the edge 16 of the widening can be rounded or beveled.
  • a type of alternative is also conceivable wherein there are a number of consecutive widenings and/or wherein the diameter of a distribution channel increases e.g. evenly or in another manner for the whole length of the distribution channel or for a part of the length of the distribution channel.
  • the modular piece can be of plastic, such as e.g. PE plastic, i.e. polyethylene plastic, or of PVC plastic, but it can also be of steel, such as stainless RST steel, or of ceramic material, or of composite material, or a combination of the aforesaid.

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  • Paper (AREA)

Claims (12)

  1. Caisse de tête (1) d'une machine à papier comprenant une canalisation de distribution (4) pour suspension pâteuse, laquelle canalisation de distribution est alimentée avec un canal d'entrée transversal (9), comme un tuyau d'entrée, pour suspension pâteuse et laquelle canalisation de distribution (4) alimente la suspension pâteuse dans une chambre intermédiaire (5) et ensuite de la chambre intermédiaire dans un canal de règle (5') de la caisse de tête (1), laquelle canalisation de distribution (4) est une canalisation de distribution formée à partir d'un certain nombre de pièces modulaires (2) et est montée sur la caisse de tête après le canal d'entrée, et dans laquelle un ou plusieurs canaux de distribution (3), comme un trou, pour la suspension pâteuse s'écoulant à travers la pièce modulaire sont formés dans la pièce modulaire (2), lesquelles pièces modulaires sont placées côte à côte de telle manière qu'un espace (13) est formé entre elles, depuis lequel espace de l'eau de dilution peut être amenée dans le canal de distribution (3), et dans lequel une plaque perforée (7') comprenant des trous ou des ouvertures est agencée dans la caisse de tête (1) après les pièces modulaires (2), caractérisée en ce que les pièces modulaires (2) sont à une certaine distance l'une de l'autre, et une seconde plaque perforée (7) comprenant des trous ou des ouvertures est agencée entre le canal d'entrée (9) et la canalisation de distribution (4).
  2. Caisse de tête (1) selon la revendication 1, caractérisée en ce qu'une pièce modulaire (2) comprend un certain nombre de canaux de distribution (3) l'un au-dessus de l'autre ou côte à côte.
  3. Caisse de tête (1) selon la revendication 1, caractérisée en ce que les pièces modulaires comprennent des rainures (11') et/ou des saillies (11), avec lesquelles les pièces modulaires sont fixées sur la caisse de tête (1).
  4. Caisse de tête (1) selon la revendication 1, caractérisée en ce que le bâti (1') de la caisse de tête comprend des saillies et/ou des rainures (6) pour fixer les pièces modulaires.
  5. Caisse de tête (1) selon la revendication 1, caractérisée en ce que le diamètre des canaux de distribution est constant, ou leur diamètre varie.
  6. Caisse de tête (1) selon la revendication 1, caractérisée en ce que les canaux de distribution comprennent un ou plusieurs élargissements et/ou rétrécissements (3").
  7. Caisse de tête (1) selon la revendication 1, caractérisée en ce que un/des trou(s) d'entrée (12) est/sont formé(s) dans les pièces modulaires (2) pour alimenter de l'eau de dilution dans un canal/des canaux de distribution (3).
  8. Caisse de tête (1) selon la revendication 7, caractérisée en ce que un/des trou(s) d'entrée (12) est/sont formé(s) dans les côtés et/ou les bords d'une pièce modulaire (2).
  9. Caisse de tête (1) selon la revendication 1, caractérisée en ce que la pièce modulaire est, vue depuis son extrémité, rectangulaire ou en forme de parallélogramme ou trapézoïdale.
  10. Caisse de tête (1) selon la revendication 1, caractérisée en ce que la pièce modulaire est en plastique, comme par exemple du polyéthylène ou du polyéthylène haute densité.
  11. Caisse de tête (1) selon la revendication 1, caractérisée en ce que la pièce modulaire est en acier, comme de l'acier RST inoxydable, ou en matériau céramique, ou en matériau composite.
  12. Caisse de tête (1) selon la revendication 1, caractérisée en ce que l'aire en section transversale d'écoulement d'un canal d'entrée (9) s'élargit ou reste constante dans la direction transversale de la caisse de tête.
EP12163696.3A 2011-04-28 2012-04-11 Canalisation de distribution en relation avec la caisse d'arrivée d'une machine à papier Active EP2518211B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20115407A FI20115407A (fi) 2011-04-28 2011-04-28 Paperikoneen perälaatikon yhteydessä oleva jakokanavisto

Publications (2)

Publication Number Publication Date
EP2518211A1 EP2518211A1 (fr) 2012-10-31
EP2518211B1 true EP2518211B1 (fr) 2013-11-27

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EP12163696.3A Active EP2518211B1 (fr) 2011-04-28 2012-04-11 Canalisation de distribution en relation avec la caisse d'arrivée d'une machine à papier

Country Status (4)

Country Link
US (1) US20120273150A1 (fr)
EP (1) EP2518211B1 (fr)
CN (1) CN102758376A (fr)
FI (1) FI20115407A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016114040A1 (de) 2016-07-29 2018-02-01 Voith Patent Gmbh Strömungsmodul und Verfahren zur Herstellung eines Strömungsmoduls für einen Stoffauflauf einer Papiermaschine
DE102016015752A1 (de) 2016-07-29 2018-03-01 Voith Patent Gmbh Strömunqsqitter und Verfahren zur Herstellunq eines Strömunqsqitters für einen Stoffauflauf einer Papiermaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI98938C (fi) 1996-06-20 1997-09-10 Valmet Corp Laitteisto laimennusvirtauksen yhdistämiseksi paperikoneen/kartonkikoneen jakotukista johdettuun massavirtaukseen
FI115646B (fi) * 1996-11-26 2005-06-15 Metso Paper Inc Paperikoneen/kartonkikoneen monikerrosperälaatikko
FI117443B (fi) * 2003-09-09 2006-10-13 Metso Paper Inc Laitteisto paperikoneen tai vastaavan perälaatikon yhteydessä
FI120591B (fi) 2005-05-03 2009-12-15 Vaahto Oy Menetelmä ja laitteisto paperikoneen perälaatikon yhteydessä
CN101622399B (zh) * 2007-03-01 2012-10-17 梅特索·佩珀·卡尔斯塔德公司 纸幅制造机中的流浆箱的功能部件所用的结构元件、功能部件和由其制造的流浆箱以及相关方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016114040A1 (de) 2016-07-29 2018-02-01 Voith Patent Gmbh Strömungsmodul und Verfahren zur Herstellung eines Strömungsmoduls für einen Stoffauflauf einer Papiermaschine
WO2018019545A1 (fr) 2016-07-29 2018-02-01 Voith Patent Gmbh Module d'écoulement et procédé de production d'un module d'écoulement pour une caisse de tête d'une machine à papier
DE102016015752A1 (de) 2016-07-29 2018-03-01 Voith Patent Gmbh Strömunqsqitter und Verfahren zur Herstellunq eines Strömunqsqitters für einen Stoffauflauf einer Papiermaschine

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CN102758376A (zh) 2012-10-31
FI20115407A (fi) 2012-10-29
EP2518211A1 (fr) 2012-10-31
US20120273150A1 (en) 2012-11-01

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