EP0492190A1 - Einstellvorrichtung für den Oberlippenbalken eines Stoffauflaufkastens - Google Patents

Einstellvorrichtung für den Oberlippenbalken eines Stoffauflaufkastens Download PDF

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Publication number
EP0492190A1
EP0492190A1 EP91120791A EP91120791A EP0492190A1 EP 0492190 A1 EP0492190 A1 EP 0492190A1 EP 91120791 A EP91120791 A EP 91120791A EP 91120791 A EP91120791 A EP 91120791A EP 0492190 A1 EP0492190 A1 EP 0492190A1
Authority
EP
European Patent Office
Prior art keywords
top lip
lip beam
headbox
front wall
adjusting
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
EP91120791A
Other languages
English (en)
French (fr)
Inventor
Matti Oinonen
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 Karhula Inc
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 Karhula Inc filed Critical Valmet Karhula Inc
Publication of EP0492190A1 publication Critical patent/EP0492190A1/de
Pending 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
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/028—Details of the nozzle section
    • 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

Definitions

  • the invention concerns an adjusting device for the top lip beam of the headbox of a paper machine, board machine, or wet-lap pulp machine, by whose means the position of the top lip beam is changed for regulation of the height and position of the discharge opening and which top lip beam is included in a headbox in whose discharge duct there is a perforated roll as an equalizing member, and between which perforated roll and the top lip beam of the headbox there is a gap, said adjusting device comprising adjusting members for changing the position of the top lip beam and adjusting members for regulating the gap between the top lip beam and the perforated roll.
  • the conduct of the flow passing through said perforated rolls is affected by a number of parameters, such as the gap between the mantle of the perforated roll and the headbox walls and the uniformity of said gap.
  • Said gap should be as small and uniform as possible, for in the contrary case a significant proportion of the pulp suspension will flow directly through the gap, producing macro-turbulence and distorting the flow profile.
  • Said perforated rolls are placed in the slice part of the paper machine, whose principal function is to produce a homogeneous pulp jet of uniform thickness and direction.
  • the height of the discharge opening must be adjustable.
  • This so-called area regulation is frequently performed by displacing the whole front wall of the headbox.
  • the angle between the jet and the wire and the point of impingement between the jet and the wire are factors effective in the sheet formation, and therefore their regulation is necessary.
  • the starting angle of the jet can be adjusted by shifting the top lip in the direction of the machine.
  • change the point of impingement by means of a single regulation operation by shifting the breast roll in the direction of the machine.
  • it is known in prior art to arrange the whole headbox as tiltable on hinge joints as well as to arrange the headbox displaceable both vertically and horizontally and, at the same time, also tiltable.
  • the front wall of the headbox must be dimensioned rigid to prevent deformations caused by the internal pressure, because otherwise a deflection of the upper lip will change the flow conditions, e.g. the impingement angle and the point of impingement between the jet and the wire, which thus become dependent on the pressure.
  • FI Patent 66,219 wherein a device for regulation of the front wall beam of the headbox of a paper machine is described, by whose means the position of the front wall beam is changed to adjust the height of the discharge opening and the impingement angle between the pulp jet and the wire, said front wall beam belonging to a headbox in whose slice part a perforated roll is used as an equalizing member, in which solution it is novel that the front wall beam is supported so as to be pivoted by means of power units on support of a horizontal pivot shaft transverse to the paper machine at such a point that a plane placed through said pivot shaft and through the axis of rotation of said perforated roll passes substantially at the point at which the gap between the circumference of the perforated roll and the front wall beam is smallest.
  • a headbox of a paper machine whose discharge cone part or equivalent flow part, which becomes narrower in the flow direction of the pulp suspension, is defined by a lower-lip construction and by an upper-lip construction and in which headbox, permanently mounted inside the discharge cone part, there is a perforated roll or an equivalent turbulence member, above which, with a certain flow gap, an upper-lip plate is placed, whose front edge is attached to the front wall beam of the upper lip by means of an articulated joint, and in which it has been considered novel that the upper-lip plate has a continuous and unified flow guide face and that the upper-lip plate construction is supported on the front wall constructions by means of such a support fitting, for example groove-projection fitting, that the flow gap between the guide face of the lip plate of the upper lip and the perforated roll remains substantially invariable when the lip is adjusted, with different positions of the upper-lip plate.
  • a support fitting for example groove-projection fitting
  • the gap space between the front wall of the headbox displaceable up and down and the stationary front wall is closed by means of a rubber plate.
  • a rubber plate readily becomes brittle at a high temperature and starts leaking, first at its edges placed against the side walls of the headbox.
  • the object of the invention is to suggest a solution in which the above drawbacks and problems related to the prior-art solutions do not occur.
  • a further object of the invention is to improve the tightness of the headbox and to suggest a solution whose service life is longer and whose servicing is simpler than in the case of the prior-art solutions.
  • the adjusting device in accordance with the invention for the top lip beam of a headbox is mainly characterized in that the members for adjusting the gap between the top lip beam and the perforated roll consist of a mobile, rigid partition wall, which is by one end linked with the top lip beam and by the other end linked with a part which is arranged mobile in the vertical direction in relation to the stationary front wall, and that the partition wall closes the opening between the stationary front wall and the top lip beam.
  • the construction of the adjusting device in accordance with the invention is simple, and by means of articulated joints, sufficient degrees of freedom are achieved so that the plate can move to the necessary extent in the direction of the discharge flow and in the direction up and down when necessary.
  • the solution in accordance with the invention is stable, because in the parts of the headbox that are filled with liquid, no stretching members are used, which might maintain detrimental pressure oscillations in the liquid quantity.
  • the rigid wall provides an attenuation of the pressure oscillations.
  • the headbox of a paper machine is shown as a schematic sectional view with a side wall removed.
  • the side wall is illustrated schematically with the dashed line 70.
  • a cantilever bracket 52 is attached by means of a fastening piece 51 and fastening members 61, 62, e.g. screws 61 and a weld joint 62.
  • an adjusting member 54 e.g. a turnbuckle, is linked 53, whose opposite end is linked 55 to a fastening piece 71 fixed to the mobile front wall of the headbox, i.e. to the mobile top lip beam 13.
  • a second adjusting member 56 e.g. a turnbuckle
  • a second cantilever bracket 58 is fixed, e.g. by means of a weld joint 62, to the fastening piece 59, which is fixed to the stationary front wall beam 40, e.g., by means of screws.
  • the rigid partition wall 30 between the pivot shafts 31 and 32 supports the mobile front wall beam, i.e. top lip beam 13, and at the same time closes the opening between the top lip beam 13 and the stationary front wall construction 40.
  • top lip beam 13 is fitted on support by means of the rigid partition wall 30 and the cantilever bracket 52 and the adjusting member 54, and the position of the top lip beam 13 in the lateral direction is determined by the intermediate of the cantilever bracket 58 and the adjusting member 56.
  • the discharge duct 16 of the headbox is defined by the bottom face 27 of the mobile top lip beam 13, and the lower part of the discharge duct 16 is defined by the top face 28 of the lower lip beam 12 of the headbox.
  • the cross-sectional area of the discharge duct 16 becomes narrower towards the discharge opening 15, and the discharge jet 11 passes out of the discharge opening 15.
  • a profile bar 20 is attached by means of fastening members 21 to the top lip beam 13, a profile bar 20 is attached by means of fastening members 21.
  • the height of the discharge opening 15 is denoted with the reference h, and the denotation s represents the position of the discharge opening 15 in the horizontal direction in relation to the bottom face 28.
  • a perforated roll 14 is placed, which stirs and equalizes the pulp flow.
  • further perforated rolls 24 are also placed to produce the necessary turbulence in the pulp flow.
  • the liquid level of the pulp in the headbox is denoted with the reference numeral 17.
  • the overflow trough of the headbox is denoted with the reference numeral 86 and the discharge opening of the overflow trough with the reference numeral 85.
  • the overflow trough 86 the proportion of the pulp flow is discharged over the dam 87 that is not passed into the discharge duct 16. In this way, sedimentation of the pulp suspension is prevented.
  • the discharge opening quantities h and s are regulated so that the height h of the discharge opening 15 is adjusted by means of the adjusting member 54, by whose means the top lip beam 13 is shifted vertically, whereas an adjusting member 56 is provided for lateral adjustment, i.e. for adjustment of the position s of the discharge opening 15, the top lip beam 13 being shifted in the lateral direction by means of said adjusting member 56.
  • an adjusting device is fitted between the top lip beam 13 and the stationary front wall beam 40, which adjusting device consists of a mobile rigid partition wall 30, which is, at both of its ends, linked by means of horizontal pivot shafts 31 and 32.
  • the pivot shaft 32 is attached to the top lip beam 13 by means of a link socket 42, and the pivot shaft 31 is attached to the part 43, such as a slide, by means of a link socket 41, which slide 43 is arranged mobile in relation to the stationary front wall, for example vertically mobile on a prism 45 in the way indicated by the arrow V.
  • the magnitude of the gap C between the top lip beam 13 and the perforated roll 14 is adjusted by means of the adjusting member 46, e.g. an adjusting screw.
  • the adjusting member 46 is, by one end, attached to the front wall beam 40 by means of the fastening piece 47, and by the opposite end to the link socket 41 of the pivot shaft 31.
  • the position of the part 43 is shifted in relation to the front wall beam 40.
  • the pivot shafts 31 and 32 are fitted to turn in their link sockets 41 and 42 to the extent required by the adjustments of the top lip beam 13, for example about 30°.
  • the constructions, cantilever brackets 52, adjusting members 54, and other parts related to them and provided for vertical adjustment of the top lip beam 13, i.e. for adjustment of the height h of the discharge opening 15, are fitted as a number of at least 2 pcs. as equally spaced in the horizontal direction in the headbox, and so are the members, adjusting members 56, cantilever brackets 58, and other parts related to them and provided for lateral adjustment of the top lip beam 13, i.e. for adjustment of the position s of the discharge opening 15.
  • There is one arrangement provided for the adjustment of the gap C i.e. the mobile rigid partition wall 30 extends across entire width of the headbox. This rigid partition wall 30 is sealed against the side walls 70 of the headbox at both sides of the headbox.
  • the device for adjusting the top lip beam 13 of a headbox consists of a rigid, mobile partition wall 30, for example a steel wall, which is linked by its ends by means of horizontal pivot shafts 31 and 32.
  • the pivot shaft 31 is connected to the part 43, which is fitted to move up and down at the top end of the partition wall 30 in relation to the front wall 40, as is indicated by the arrow V.
  • the quantities h and s that define the discharge opening 15 are regulated so that the top lip beam 13 is shifted vertically by means of the adjusting member 54 and laterally by means of the adjusting member 56.
  • adjustment of the discharge opening 15 also affects the magnitude of the gap C, in which case it may also be necessary to adjust the gap C, which is, thus, adjusted by means of a part, e.g. a slide 43, moving on the stationary front wall beam 40, e.g. on a prism 45, and by means of the adjusting member 46. Adjustment of the gap C also affects the height h and the position s of the discharge opening 15 slightly.
  • the material of the rigid wall 30 it is possible to use, e.g., steel. As was mentioned above, other metallic materials are also possible.
  • the partition wall preferably a thick, plane steel sheet is used.

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  • Paper (AREA)
EP91120791A 1990-12-21 1991-12-03 Einstellvorrichtung für den Oberlippenbalken eines Stoffauflaufkastens Pending EP0492190A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI906349A FI85996C (fi) 1990-12-21 1990-12-21 Regleranordning foer den oevre laeppbalken av en inloppslaoda.
FI906349 1990-12-21

Publications (1)

Publication Number Publication Date
EP0492190A1 true EP0492190A1 (de) 1992-07-01

Family

ID=8531636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91120791A Pending EP0492190A1 (de) 1990-12-21 1991-12-03 Einstellvorrichtung für den Oberlippenbalken eines Stoffauflaufkastens

Country Status (6)

Country Link
EP (1) EP0492190A1 (de)
JP (1) JPH04300382A (de)
KR (1) KR920012654A (de)
CN (1) CN1062565A (de)
CA (1) CA2056849A1 (de)
FI (1) FI85996C (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5578172A (en) * 1994-12-20 1996-11-26 Voith Sulzer Papiermaschinen Gmbh Slice beam support plate
WO2000043591A1 (en) * 1999-01-21 2000-07-27 Valmet-Karlstad Ab Headbox and setting device therefor
CN104452405A (zh) * 2014-11-10 2015-03-25 合肥宏图彩印有限公司 一种垂直式唇板

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103147340B (zh) * 2013-03-14 2015-12-23 金红叶纸业集团有限公司 改善浆料纤维交织效果的方法
US10550520B2 (en) * 2018-04-05 2020-02-04 Gl&V Canada Inc. Method with a horizontal jet applicator for a paper machine wet end

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1276040A (en) * 1969-06-23 1972-06-01 Ahlstroem Oy Paper machine head box
FI66219B (fi) * 1978-09-01 1984-05-31 Valmet Oy Regleranordning foer fraemre vaeggen i en inloppslaoda i en papersmaskin
DE3730775A1 (de) * 1986-09-19 1988-03-31 Valmet Oy Verfahren und vorrichtung im stoffauflauf einer papiermaschine und in dessen zulaufrohrsystem

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1276040A (en) * 1969-06-23 1972-06-01 Ahlstroem Oy Paper machine head box
FI66219B (fi) * 1978-09-01 1984-05-31 Valmet Oy Regleranordning foer fraemre vaeggen i en inloppslaoda i en papersmaskin
DE3730775A1 (de) * 1986-09-19 1988-03-31 Valmet Oy Verfahren und vorrichtung im stoffauflauf einer papiermaschine und in dessen zulaufrohrsystem

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5578172A (en) * 1994-12-20 1996-11-26 Voith Sulzer Papiermaschinen Gmbh Slice beam support plate
WO2000043591A1 (en) * 1999-01-21 2000-07-27 Valmet-Karlstad Ab Headbox and setting device therefor
CN104452405A (zh) * 2014-11-10 2015-03-25 合肥宏图彩印有限公司 一种垂直式唇板

Also Published As

Publication number Publication date
FI85996C (fi) 1992-06-25
CN1062565A (zh) 1992-07-08
KR920012654A (ko) 1992-07-27
FI85996B (fi) 1992-03-13
FI906349A0 (fi) 1990-12-21
JPH04300382A (ja) 1992-10-23
FI906349A7 (fi) 1992-03-13
CA2056849A1 (en) 1992-06-22

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