EP4528025A1 - Verdünnungselement für den stoffauflauf einer faserbahnmaschine, und stoffauflauf einer faserbahnmaschine - Google Patents

Verdünnungselement für den stoffauflauf einer faserbahnmaschine, und stoffauflauf einer faserbahnmaschine Download PDF

Info

Publication number
EP4528025A1
EP4528025A1 EP24196374.3A EP24196374A EP4528025A1 EP 4528025 A1 EP4528025 A1 EP 4528025A1 EP 24196374 A EP24196374 A EP 24196374A EP 4528025 A1 EP4528025 A1 EP 4528025A1
Authority
EP
European Patent Office
Prior art keywords
dilution
pipe
opening
headbox
dilution element
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.)
Pending
Application number
EP24196374.3A
Other languages
English (en)
French (fr)
Inventor
Toni KANGAS
Marko Mantila
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
Valmet Technologies 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 Valmet Technologies Oy filed Critical Valmet Technologies Oy
Publication of EP4528025A1 publication Critical patent/EP4528025A1/de
Pending legal-status Critical Current

Links

Images

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
    • 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
    • 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

Definitions

  • the invention relates to a dilution element for a headbox of a fibre web machine, which is adaptable in connection with a headbox and which includes:
  • the invention also relates to a headbox of a fibre web machine.
  • the structural component is a solid sheet piece with the same width as the entire machine, and holes have been machined in the piece over the entire width of the machine for the stock flow and dilution water supply taking place through it and for their mixing inside the structural component.
  • Figure 1 shows one example of a prior art solution, with the headbox in cross section in the cross direction of the machine.
  • stock flow 38 is supplied from manifold 26 through distribution plate 17', inlet pipe 16 adapted in it, dilution element 10', outlet pipe 29 and distribution pipe 32 forward to the turbulence generator (through an intermediate chamber) and from there further to the wire section (not shown).
  • Dilution water supply has its own connection with opening 15 through pipe connection 21 adapted to dilution element 10'.
  • Dilution element 10 is formed by structural piece 11.1 and its cover 11.2 adapted and joined to each other one after the other in machine direction MD.
  • mixing spaces 14 are formed inside dilution element 10', and dilution water supplied into mixing spaces 14 is mixed with the stock flow supplied into mixing spaces 14 from manifold 26.
  • a single dilution element 10' contains several separate mixing spaces 14 side by side in the cross direction of the machine.
  • structural piece 11.1 and also its cover 11.2 are a sheet piece with a solid cross section and a height which is considerably high with respect to the height of the through-flow channel and mixing space 14, and its manufacturing and also supporting to headbox structures 17' also involve welding. When implemented in this way, the structures become considerably expensive.
  • the objective of the present invention is to accomplish a dilution element for the headbox of a fibre web machine, where the dilution element has a light and simple structure and is also easier to build.
  • the characteristic features of the dilution element according to the invention will be more fully understood from claim 1.
  • Another objective of the invention is to accomplish a fibre web machine headbox, which is easier to manufacture and has a lighter structure.
  • the characteristic features of the headbox according to the invention will be more fully understood from claim 10.
  • the inlet pipe of the dilution water element extends into the pipe sleeve in the direction of travel of the stock flow, to at least the first opening in the pipe sleeve, and the inlet pipe is adapted to be sealed against the inner surface of the pipe sleeve.
  • each dilution element in the headbox is a separate structural item and hence easily replaceable in the headbox.
  • the dilution element and its manufacture tie less capital.
  • the manufacture of the dilution element is also simplified, when, instead of a massive machined solid plate piece, the dilution element can be implemented as a simple and light pipe sleeve.
  • Figure 2 shows one embodiment of dilution elements 10 for headbox 30 of a fibre web machine.
  • the figure shows two dilution elements 10 as if they were installed in parallel in headbox 30 without the other surrounding structures in headbox 30.
  • Dilution element 10 according to the invention is installable in a replaceable manner in connection with headbox 30 of a fibre web machine, the more detailed structure of headbox 30 to be presented on a level of principle as an example in Figure 7 and described further below in the description.
  • the fibre web machine can be a paper or board machine, pulp-drying machine or tissue machine, among other things.
  • Headbox 30 is used for spreading and supplying stock flow 44 to the forming section of a fibre web machine in a manner known in itself.
  • Dilution element 10 is used for adjusting the consistency of stock flow 38 coming from manifold 26.1, 26.2 before supplying the stock flow forward in flow direction F in headbox 30.
  • the purpose, principle of operation and importance of dilution element 10 in headbox 30 of a fibre web machine are obvious for a person having ordinary skill in the art, which is why they are not described in more detail here.
  • Dilution element 10 includes mixing space 14 adapted to be formed inside it and flow openings 15, 19 and 20 for inlet and outlet.
  • Mixing space 14, of which there is now one in dilution element 10, is adapted to be formed inside dilution element 10.
  • dilution water 37 is mixed in mixing space 14 in the set manner into stock flow 38 supplied into mixing space 14, after which diluted stock flow 44 exits mixing space 14 forward in flow direction F.
  • Stock flow 44 diluted in mixing space 14 is supplied further in flow direction F of headbox 30 towards the next section of headbox 30 and hence also towards the forming section.
  • Openings 15, 19, 20 included in dilution element 10 are adapted to converge in mixing space 14.
  • Dilution water 37 is adapted to be supplied through first opening 15 into mixing space 14.
  • Stock flow 38 is adapted to be supplied through second opening 19 from manifold 26.1, 26.2 into mixing space 14. This takes place by means of inlet pipe 16 adaptable in opening 19.
  • Inlet pipe 16 is adapted to be sealed against inner surface 25 of second opening 19.
  • Stock flow 38 diluted with dilution water 37 in mixing space 14 is adapted to be supplied as diluted stock flow 44 through third opening 20 from mixing space 14 forward in flow direction F.
  • outlet pipe 29 adaptable in opening 20.
  • Outlet pipe 29 is adapted to be sealed against inner surface 27 of third opening 20.
  • openings 15, 19, 20 is adapted in dilution element 10 so that second and third openings 19, 20 are adapted in dilution element 10 on the opposite sides of headbox 30 in flow direction F of headbox 30.
  • Opening 15 for dilution water and its flow direction are mainly at a right angle or at a sharp angle with respect to flow direction F of stock flows 38, 44.
  • Dilution element 10 is adapted to be formed by pipe sleeve 11 over its section between second and third openings 19, 20.
  • dilution element 10 is a solid structural piece with a single part and a single material and a pipe-like cross section in flow direction F of headbox 30, adapted into the shape of a pipe.
  • Mixing space 14 is also adapted to be formed inside pipe sleeve 11, between second and third openings 19, 20.
  • the outer surface of shell 12 of pipe sleeve 11 is a solid of revolution, such as a cylinder.
  • the wall thickness of shell 12 is relatively small in relation to, for example, the diameter of pipe channel 13 formed inside pipe sleeve 11, or in general in relation to outer diameter D of pipe sleeve 11.
  • Figure 4 shows dilution elements 10.1, 10.2 of Figure 2 from above
  • Figure 3 shows one dilution element 10 of Figures 2 and 4 as an exploded figure
  • Figure 5 shows one dilution element 10 shown in Figures 2-4 in cross section in machine direction MD.
  • Figure 6 shows dilution element 10 that is shown in cross section in Figure 5 separate from inlet and outlet pipes 16, 29 that can be connected to it.
  • inlet pipe 16 and outlet pipe 29 are adapted to be fastened to dilution element 10 by means of spring pin fastening 22.
  • Spring pin fastening 22 is adapted to influence inlet pipe 16 and outlet pipe 29 through shell 12 of pipe sleeve 11.
  • Pipe sleeve 11 includes, as shown in Figure 3 , notches 24 for spring pin fastening 22. During fastening, spring pins 39 fit in notches 24.
  • inlet pipe 16 and outlet pipe 29 include grooves 43 adapted on their outer surface 41, 42 as shown in, for example, Figure 6 , for spring pin fastening 22 of pipes 16, 20 to dilution element 10.
  • Sealing 23.1, 23.2 is adaptable between inner surface 25 of inlet side opening 19 and inlet pipe 16 of dilution element 10 as well as between the outlet side of dilution element 10, in other words between inner surface 27 of third opening 20 and outlet pipe 29, as shown in Figures 5 and 6 .
  • inlet and outlet pipes 16, 29 have sealing grooves 45 shown in Figure 6 , into which grooves the seal (not illustrated) settles. While the seal is in groove 45, the seal presses against inner surfaces 25, 27 of second and third openings 19, 20.
  • Spring pin fastening 22 is adapted on the opposite side of sealing 23.1, 23.2 with respect to the mixing chamber.
  • Outlet end 16' of inlet pipe 16 of dilution element 10 is located inside pipe sleeve 11.
  • Inlet pipe 16 extends into pipe sleeve 11 in the direction of travel of the stock flow, at least to opening 15 of the pipe connection of pipe sleeve 11.
  • Dilution water 37 supplied through pipe connection 21 of pipe sleeve 11 is advantageously directed to the outer surface of inlet pipe 16, from where it is directed into the stock flow through a ring-shaped opening, which is formed between the ends of inlet pipe 16 and outlet pipe 29.
  • Inlet end 29' of outlet pipe 29 of dilution element 10 is located inside pipe sleeve 11, advantageously in the direction of travel of the stock flow after opening 15 of the pipe connection of pipe sleeve 11. The mixed stock flow and dilution water are supplied through outlet pipe 29.
  • the inner diameter of pipe channel 13 ( Figure 6 ) adapted to be formed between second opening 19 and third opening 20 of pipe sleeve 11 is adapted to be larger on the side of third opening 20 than on the side of second opening 19.
  • the cross-sectional area of the chamber space formed at the end of outlet pipe 29 bigger than the cross section of inlet pipe 16. The result of this is that a ring-shaped gap, through which dilution water 37 is supplied into mixing space 14 with the principle of ring dilution, is formed between the ends of inlet pipe 16 and outlet pipe 29.
  • dilution water 37 is brought together with stock flow 38 that is supplied from the manifold into mixing space 14 and discharged into it from inlet pipe 16 in a manner that surrounds stock flow 38.
  • Figure 5 shows well this size difference between the ends of pipes 16, 29.
  • Figure 5 also shows well the small gap remaining between the outlet end of inlet pipe 16 adapted in mixing space 14 and the inlet end of outlet pipe 29, from which gap dilution water 37 supplied into mixing space 14 through connection 21 can mix with main stock flow 38 of headbox 30 coming along inlet pipe 16.
  • mixing space 14 is adapted to be formed in pipe sleeve 11, when inlet pipe 16 and outlet pipe 29 are adapted in openings 19, 20 of pipe sleeve 11.
  • First opening 15 is adapted in shell 12 of pipe sleeve 11 to join adapted pipe connection 21.
  • Pipe connection 21 is arranged to join pipe sleeve 11, for example, perpendicularly or at a sharp angle (in the direction of travel of stock flows 38, 44).
  • dilution element 10 is adaptable to be supported to headbox 30 structures 17, 18 indirectly by means of inlet pipe 16 and outlet pipe 29.
  • pipe sleeve 11 is not in direct structural contact by, for example, its shell 12 to headbox 30 structures 17, 18.
  • pipe sleeve 11 is arrangeable so that it is not directly supported to headbox 30 structures 17, 18.
  • dilution elements 10 can be fastened to headbox 30 manifold 26.1, 26.2 via inlet pipe 16, for example, via distribution plate 17. The flow that turns from manifold 26.1, 26.2 is supplied via inlet pipe 16 into mixing space 14 adapted to be formed in pipe sleeve 11.
  • outer diameter D of pipe sleeve 11 adapted to form dilution element 10 is adapted as shown in Figures 2 and 4 so that adjacent dilution elements 10.1, 10.2 arranged in connection with headbox 30 are adapted to be supported to each other in cross direction CD of headbox 30.
  • dilution element 10.1 is adapted to be supported at its installation site by its sides to adjacent elements 10.2 in order to reduce the pressure load, which is usually significant, considering the operating conditions of headbox 30.
  • dilution elements 10 are side by side and in contact with each other. Dilution elements 10 are in contact with each other linearly only by their sides, by their shell 12.
  • dilution element 10 in other words pipe sleeve 11, can be made from, for example, plastic material, by using the die casting technique, for example.
  • dilution element 10 can also be manufactured as a 3D printout, for example.
  • headbox 30 In addition to dilution element 10, the invention also relates to headbox 30, one example of which is presented in Figure 7 .
  • the basic components of headbox 30 include manifold 26, 26.1, 26.2, dilution elements 10 and turbulence generator 33.
  • the headbox shown in the application example presented is a double layer headbox 31.
  • Mixing space 14 is adapted to be formed in each dilution element 10, into which mixing space 14 stock flow 38 is adapted to be supplied from manifold 26.1, 26.2 via inlet pipe 16, and into which mixing space 14 dilution water 37 is adapted to be supplied in order to dilute stock flow 38 in mixing space 14.
  • stock flow 44 diluted with dilution water 37 is adapted to be supplied from dilution elements 10 forward in flow direction F of headbox 30 via outlet pipe 29.
  • Outlet pipe 29 can connect to a distribution pipe included in piping 32, which distribution pipe supplies diluted stock flow 44 further to turbulence generator 33, lip channel 34, slice 35 and further to the forming section wire 36 for web W formation.
  • Dilution element 10 is a dilution element according to the invention, where its section between second and third openings 19, 20 is adapted to be formed by pipe sleeve 11, inside which mixing space 14 is adapted to be formed. Moreover, first opening 15, which supplies dilution water 37 into pipe sleeve 11, is adapted in shell 12 of pipe sleeve 11.
  • manifold 26.1, 26.2 is fitted with distribution plate 17 provided with openings 40, the height H of which distribution plate 17 is adapted to correspond to dilution element 10.
  • the height H of distribution plate 17 remains moderate and requires less material.
  • the solution according to the invention can also be utilised in headboxes with more than one tube row in the manifold tube bank.
  • headboxes with two manifold tube banks one on top of the other it is possible to use a pipe sleeve that extends to both tube banks in the height direction.
  • dilution water is supplied into tubes in both superimposed tube banks through the same dilution connection.
EP24196374.3A 2023-09-22 2024-08-26 Verdünnungselement für den stoffauflauf einer faserbahnmaschine, und stoffauflauf einer faserbahnmaschine Pending EP4528025A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20236054A FI131824B1 (fi) 2023-09-22 2023-09-22 Laimennuselementti kuiturainakoneen perälaatikkoa varten ja kuiturainakoneen perälaatikko

Publications (1)

Publication Number Publication Date
EP4528025A1 true EP4528025A1 (de) 2025-03-26

Family

ID=92542723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP24196374.3A Pending EP4528025A1 (de) 2023-09-22 2024-08-26 Verdünnungselement für den stoffauflauf einer faserbahnmaschine, und stoffauflauf einer faserbahnmaschine

Country Status (3)

Country Link
EP (1) EP4528025A1 (de)
CN (1) CN119686149A (de)
FI (1) FI131824B1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040140576A1 (en) * 2001-05-01 2004-07-22 La Crosse Gaylen R. Treatment of water with contaminants
WO2011039190A1 (de) * 2009-09-29 2011-04-07 Siemens Aktiengesellschaft Vorrichtung, damit ausgestattete flotationsmaschine, sowie verfahren zu deren betrieb
WO2011095251A1 (de) * 2010-02-03 2011-08-11 Voith Patent Gmbh Ventil zum regulieren eines fluidstroms
WO2011134682A1 (de) * 2010-04-30 2011-11-03 Voith Patent Gmbh Ventil zum regulieren eines fluidstroms
WO2021243121A1 (en) * 2020-05-29 2021-12-02 Kimberly-Clark Worldwide, Inc. Apparatus for forming a substrate

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE506322C2 (sv) * 1996-03-08 1997-12-01 Valmet Karlstad Ab Anordning för matning av mäld till en inloppslåda i en pappersmaskin
FI110701B (fi) * 1996-03-08 2003-03-14 Metso Paper Inc Laitteisto laimennusvirtauksen yhdistämiseksi paperikoneen/kartonkikoneen jakotukista johdettuun massavirtaukseen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040140576A1 (en) * 2001-05-01 2004-07-22 La Crosse Gaylen R. Treatment of water with contaminants
WO2011039190A1 (de) * 2009-09-29 2011-04-07 Siemens Aktiengesellschaft Vorrichtung, damit ausgestattete flotationsmaschine, sowie verfahren zu deren betrieb
WO2011095251A1 (de) * 2010-02-03 2011-08-11 Voith Patent Gmbh Ventil zum regulieren eines fluidstroms
WO2011134682A1 (de) * 2010-04-30 2011-11-03 Voith Patent Gmbh Ventil zum regulieren eines fluidstroms
WO2021243121A1 (en) * 2020-05-29 2021-12-02 Kimberly-Clark Worldwide, Inc. Apparatus for forming a substrate

Also Published As

Publication number Publication date
FI20236054A1 (fi) 2025-03-23
FI131824B1 (fi) 2025-12-17
CN119686149A (zh) 2025-03-25

Similar Documents

Publication Publication Date Title
US8221590B2 (en) Headbox for a machine for producing a fibrous web
US8303774B2 (en) Headbox for a machine for producing a fibrous web
US20120168105A1 (en) Headbox for a machine for producing a fibrous web
US8236137B2 (en) Headbox for a machine for producing a fibrous web
CN101622399B (zh) 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
GB1569430A (en) Headboxes for paper-making machines
FI115646B (fi) Paperikoneen/kartonkikoneen monikerrosperälaatikko
EP2655734B1 (de) Turbulenzerzeuger eines stoffauflaufs einer faserbahnmaschine
CA2160754C (en) Process for the production of a breast box for a paper or cartonmaking machine as well as an intermediate portion for carrying out the process
EP1102885B1 (de) Verfahren und vorrichtung in einer papier-oder pappenmaschine zur mischung von pulp und wasser zur verdünnung der pulpe
US3878039A (en) Paper machine headbox having convergent throat portion
CN115218172B (zh) 一种蒸汽发生器用旋扣式流水槽封堵装置及方法
FI3491186T3 (fi) Virtausmoduuli ja menetelmä virtausmoduulin valmistamiseksi paperikoneen perälaatikkoa varten
DE10234559A1 (de) Blattbildungssystem
US5000227A (en) Pressurized fluid carrier conduit connection
CN119686149A (zh) 用于幅材机的流浆箱的稀释元件和纤维幅材机的流浆箱
US5800678A (en) Method and device for regulating a flow of dilution liquid in connection with a headbox of a paper/board machine
US20070056708A1 (en) Apparatus in connection with a headbox of a paper machine or equivalent
FI125950B (fi) Monikerrosperälaatikko
DE102007026386B4 (de) Walzenkörper mit Profilkanälen für ein Temperierfluid
DE102007029046A1 (de) Wärmeübertragungswalze
US4895624A (en) Turbulence generator made of plastic with ceramic coated flow ducts in the head box of a paper machine
FI110528B (fi) Laitteisto paperikoneen/kartonkikoneen perälaatikon yhteydessä
US6197161B1 (en) Profile bar assembly for a headbox in a paper-making machine
US20030159790A1 (en) Process and headbox of a machine for producing a fibrous material web

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20250703