EP0708201B1 - Stoffauflauf einer Papiermaschine - Google Patents
Stoffauflauf einer Papiermaschine Download PDFInfo
- Publication number
- EP0708201B1 EP0708201B1 EP95114603A EP95114603A EP0708201B1 EP 0708201 B1 EP0708201 B1 EP 0708201B1 EP 95114603 A EP95114603 A EP 95114603A EP 95114603 A EP95114603 A EP 95114603A EP 0708201 B1 EP0708201 B1 EP 0708201B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flowbox
- channels
- turbulence
- flow direction
- dividing walls
- 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
Links
- 239000000725 suspension Substances 0.000 claims description 22
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000835 fiber Substances 0.000 description 9
- 238000005192 partition Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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
- D21F1/022—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
-
- 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
- D21F1/026—Details of the turbulence 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
- D21F1/08—Regulating consistency
Definitions
- the invention relates to a headbox Paper machine.
- the stock suspension made from paper contains long fibers, which tend to flake form which changes in density in the resulting Yield paper web; the long fibers also tend to do so align in the direction of flow so that the manufactured Paper web different tensile strengths in Longitudinal and transverse direction.
- the perfect dispersion the fiber is turbulent by application To reach current.
- US 4,504,360 describes a headbox with a Turbulence generator.
- the turbulence insert consists of essentially made up of plates of different thicknesses the machine width between the cover plate and the Bottom plate of the headbox run.
- the dilutions and thickening of the panels and the surfaces of the cover and base plate are designed so that the Flow cross section in the respective channel of the Headbox steadily reduced and over the Machine width is the same, so that a continuous Acceleration or deceleration of the stock suspension causes becomes. This will dissolve the in the stock suspension aimed at existing flakes.
- the disadvantage of this embodiment is that an adjustment of the Headbox on different material composition and machine speed is only possible to a limited extent. Furthermore, it is disadvantageous that a targeted adjustment that formed by the plates of the turbulence insert Channels on, across the width of the headbox different, Throughputs are not possible.
- DE-OS 15 61 686 describes a headbox for a Paper machine with flow chambers, their boundary walls run discontinuously in order to generate turbulence.
- this Document is also an embodiment with several Channels shown, also with trip hazards that in Flow path for turbulence generation are provided. This Embodiments have not been found to be effective.
- JP 5-13 28 85 (A) describes a headbox with a flow channel, its flow desk discontinuous for turbulence generation run.
- the discontinuity is caused by boundary surfaces that act as structural panels are trained.
- These structure plates have a turbulence-generating corrugated surface structure, which from perpendicular to the flow direction running waves is formed on.
- This embodiment also has Practice unsatisfied.
- DE 40 19 593 A1 shows a sectioned headbox over its width away in one of the turbulence generator or the grid (perforated plate) in Flow direction of the fibrous suspension upstream chamber Partitions is divided into sections, the turbulence generator in known Way equipped as a tube bundle is.
- DE 42 39 644 A1 discloses a headbox for a paper machine, wherein in an area between the first and the last chamber at least two Walls are provided, the contours of which are designed such that the lines the minima or maxima of the surface with the lines of the minima or maxima the opposite surface has an angle deviating from 0 ° or 180 ° form so that the flowing through between the wall pairs Stock suspension changes in direction transverse to the main flow direction of the Performs stock suspension.
- the object of the invention is to provide a headbox for a paper machine create with which the dispersion of the paper fibers is improved and the mechanical properties of a paper web produced as low as possible Differences in the transverse or longitudinal direction exhibit. Furthermore, there should be the opportunity to to different paper machine speeds and Material suspension properties in a simple way adjust, the setting options via the Machine width should be different.
- Channel width and thus the cross section of the individual channel variable can for example, by slidable plates happen so that at one Shift along or across the flow direction itself changing sections of different acceleration and Braking or turbulence result.
- the degree of turbulence on the one hand, but on the other a change in throughput can also be set.
- the possible design corresponds to Surface of the channels of the valve designs according to DE 42 39 643.
- Figure 5 shows a longitudinal section through the schematic Building a conventional headbox with the four Areas I, pre-chamber II, turbulence area III and outlet area IV.
- the feed in the form of a paraboloid Transverse distribution pipe from which the stock suspension is introduced in antechambers and then one, out many tubular ducts, turbulence insert is led to the outlet area.
- Figure 1 shows a headbox with an embodiment according to the first aspect of the invention, according to which - with respect Feed I, pre-chamber II and outlet area IV - conventional headbox with a turbulence area III equipped according to the first aspect of the invention is. Accordingly, the turbulence range shown exists from a variety of oblong to the flow direction Channels that are adjustable in their cross section are.
- the cross sections of the channels are also possible individually adjust so that a sectional regulation of the degree of turbulence and the throughput is also possible.
- FIG. 2 shows a further development of the inventive concept, in contrast to the embodiment in FIG. 1 of the suspension head area I of the headbox consisting of a large number of mixers into which two suspension streams Q H and Q L are fed, which combine to form sectional overall streams ,
- this embodiment of the concept of the invention there is a particular advantage in that, on the one hand, regulated stock suspension flows are fed to the mixers, which in turn lead to sectionally adjustable volume flows with adjustable density and / or sectional total volume flow; on the other hand, due to the use of adjustable cross-sections in the turbulence area III, there is an optimal adaptation to different stock suspension throughputs through the headbox and thus to a wide range of paper thicknesses or machine speeds to be produced.
- each mixer influences a "packet" of channels and thus also affects the consistency or amount of suspension in the corresponding section.
- the assignment can relate both horizontally and vertically arranged packages, or both combined, so that both individual sections - based on the width - and individual layers - based on the height of the material jet - can be influenced.
- Figure 3 finally shows a more constructive embodiment the headbox in which those shown in Figure 2 Elements are integrated in a stabilizing housing, which affects the stability of the headbox Can give advantages.
- FIG. 4 shows an embodiment in a perspective section of the turbulence area III according to the invention of a headbox.
- the direction of flow of the stock suspension is shown by the arrow S.
- the turbulence area of the headbox is machine-wide divided into sections with a section width B s by partitions T, these partitions T extending from the top to the bottom structural plate S and at the same time serving as a tie rod between these plates.
- the structure plates are each provided with surface structures on the side facing the suspension, which create turbulence in the material suspension flowing past.
Landscapes
- Paper (AREA)
- Crushing And Grinding (AREA)
- Sewing Machines And Sewing (AREA)
Description
- Figur 1 - 3:
- Stoffaufläufe mit Turbulenzbereich entsprechend dem Erfindungsgedanken.
- Figur 4:
- Perspektivischer Ausschnit des Turbulenzbereiches ;
- Figur 5:
- Ein Stoffauflauf gemäß dem Stand der Technik.
Claims (19)
- Stoffauflauf einer Papiermaschine,
mit einer maschinenbreiten Strömungskammer, die einen Zulauf und einen Auslauf hat,
mit einem in die Strömungskammer einbaubaren Turbulenzeinsatz, der eine Vielzahl von Kanäle aufweist, die jeweils eine obere Begrenzungsfläche und eine untere Begrenzungsfläche aufweisen, wobei die obere Begrenzungsfläche und die untere Begrenzungsfläche als Strukturplatten (SO, SU), die eine turbulenzerzeugende gewellte Oberflächenstruktur aufweisen, ausgebildet sind,
wobei die Querschnittfläche des einzelnen Kanales - in einem Schnitt senkrecht zur Strömungsrichtung (S) gesehen - wenigstens doppelt so lang wie breit ist, und
wobei die durch die Oberflächenstruktur der Strukturplatten (SO,SU) gebildeten Wellen unter einem Winkel von kleiner 90° zur Strömungsrichtung (S) verlaufen,
dadurch gekennzeichnet, daß die Kanäle maschinenbreit durch Trennwände (T) in Sektionen mit einer jeweiligen Sektionsbreite (BS) unterteilt sind,
daß die Trennwände (T) sich von der oben liegenden Strukturplatte (SO) zur. unten liegenden Strukturplatte (SU) erstrecken und
daß die Trennwände (T) als Zuganker zwischen der oben liegenden Strukturplatte (SO) und der unten liegenden Strukturplatte (SU) dienen. - Stoffauflauf gemäß Anspruch 1,
dadurch gekennzeichnet, daß die Kanäle senkrecht zur Strömungsrichtung (S) länglich ausgebildet sind und
daß die Querschnitte der Kanäle zur sektionalen Regulierung des Turbulenzgrades beziehungsweise des Durchsatzes einstellbar sind. - Stoffauflauf gemäß Anspruch 2,
dadurch gekennzeichnet, daß die turbulenzerzeugenden gewellten Oberflächenstrukturen an den jeweils suspensionszugewandten Längsseiten des einzelnen senkrecht zur Strömungsrichtung (S) länglichen Kanales sich befinden. - Stoffauflauf gemäß einem der Anspruche 1 - 3, dadurch gekenzeichnet, daß die Kanäle waagrecht verlaufen und sich jeder einzelne Kanal über maximal die Hälfte der Maschinenbreite erstreckt.
- Stoffauflauf gemäß einem der Auspruche 1 - 3, dadurch gekenzeichnet, daß die Kanäle waagrecht verlaufen und sich jeder einzelne Kanal über maximal ein drittel oder ein Viertel der Maschinenbreite erstreckt.
- Stoffauflauf gemäß einem der Ansprüche 1 - 5, dadurch gekenzeichnet, daß die Kanäle mit Hilfe einer Vielzahl von Platten gebildet sind.
- Stoffauflauf gemäß Anspruch 6, dadurch gekenzeichnet, daß die Platten der Kanäle in Strömungsrichtung verschiebbar sind.
- Stoffauflauf gemäß Anspruch 6 oder 7, dadurch gekennzeichnet, daß die Abstände der Platten untereinander veränderbar sind.
- Stoffauflauf gemäß einem der Ansprüche 1 - 8,
dadurch gekennzeichnet, daß die Trennwände (T) in Strömungsrichtung (S) sich erstrecken. - Stoffauflauf gemäß einem der Ansprüche 1 - 9,
dadurch gekennzeichnet, daß die Trennwände (T) - in Strömungsrichtung (S) gesehen - eine kürzere Länge als die Strukturplatten (SO, SU) aufweisen. - Stoffauflauf gemäß einem der Ansprüche 1 - 10,
dadurch gekennzeichnet, daß die Trennwände (T) - in Strömungsrichtung (S) gesehen - je ein stumpf auslaufendes Ende aufweisen. - Stoffauflauf gemäß einem der Ansprüche 1 - 11,
dadurch gekennzeichnet, daß die Trennwände (T) - in Strömungsrichtung (S) gesehen - je ein spitz auslaufendes Ende aufweisen. - Stoffauflauf gemäß einem der Ansprüche 1 -12, dadurch gekennzeichnet, daß die Zuführung von Stoffsuspension über eine Vielzahl von über die Maschinenbreite verteilt zuführenden Leitungen erfolgt.
- Stoffauflauf gemäß Anspruch 13, dadurch gekennzeichnet, daß jeder einzelnen Leitung genau ein Kanal im Turbulenzbereich zugeordnet ist.
- Stoffauflauf gemäß Anspruch 13, dadurch gekennzeichnet, daß jeder einzelnen Leitung mehrere oder mehrere benachbarte Kanäle im Turbulenzbereich zugeordnet sind.
- Stoffauflauf gemäß einem der Ansprüche 13 - 15, dadurch gekennzeichnet, daß mindestens einer Zuleitung eine Drosselvorrichtung vorgeschaltet ist.
- Stoffauflauf gemäß einem der Ansprüche 13 - 16, dadurch gekennzeichnet, daß mindestens einer Zuleitung ein Mischventil vorgeschaltet ist.
- Stoffauflauf gemäß Anspruch 17, dadurch gekennzeichnet, daß jedem Mischventil mindestens je zwei Stoffsuspensionsströme mit unterschiedlichen Eigenschafte bezüglich Zusammensetzung und/oder Durchsatzmenge zugeführt werden können.
- Stoffauflauf gemäß einem der Ansprüche 1 - 18,
dadurch gekennzeichnet, daß der Stoffauflauf ein Mehrschichtenstoffauflauf ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4433445A DE4433445C1 (de) | 1994-09-20 | 1994-09-20 | Stoffauflauf einer Papiermaschine |
| DE4433445 | 1994-09-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0708201A1 EP0708201A1 (de) | 1996-04-24 |
| EP0708201B1 true EP0708201B1 (de) | 2003-01-02 |
Family
ID=6528661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95114603A Expired - Lifetime EP0708201B1 (de) | 1994-09-20 | 1995-09-16 | Stoffauflauf einer Papiermaschine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5741401A (de) |
| EP (1) | EP0708201B1 (de) |
| AT (1) | ATE230453T1 (de) |
| CA (1) | CA2158677A1 (de) |
| DE (2) | DE4433445C1 (de) |
| FI (1) | FI113553B (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6264796B1 (en) | 1999-07-13 | 2001-07-24 | The Mead Corporation | Headbox diffuser |
| DE19937302A1 (de) * | 1999-08-10 | 2001-02-15 | Voith Paper Patent Gmbh | Stoffauflauf |
| DE10308555A1 (de) * | 2003-02-27 | 2004-10-21 | Voith Paper Patent Gmbh | Stoffauflauf |
| DE102004000052A1 (de) * | 2004-11-19 | 2006-05-24 | Voith Paper Patent Gmbh | Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Papier- oder Kartonbahn |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4019593A1 (de) * | 1990-06-20 | 1992-01-09 | Voith Gmbh J M | Stoffauflauf fuer papiermaschinen |
| DE4239644A1 (de) * | 1992-11-26 | 1994-06-01 | Voith Gmbh J M | Stoffauflauf einer Papiermaschine mit Welleneinsatz |
Family Cites Families (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE370422C (de) * | 1923-03-02 | Max Wenzel | Vorrichtung zum Erzielen einer guten Durchmischung des Stoffwassers und vermehrter Querlagerung von Fasern an Langsiebpapiermaschinen mit am Stoffkasten angeordneter Stoffauslassduese | |
| NO119299B (de) * | 1962-04-12 | 1970-04-27 | Karlstad Mekaniska Ab | |
| GB1179847A (en) * | 1966-09-01 | 1970-02-04 | St Annes Board Mill Co Ltd | Flowbox |
| US3514372A (en) * | 1966-11-29 | 1970-05-26 | Beloit Corp | Headbox method and means for blending of multiple jets |
| DE1941424C3 (de) * | 1969-08-14 | 1980-07-10 | Escher Wyss Gmbh, 7980 Ravensburg | Stoffauflauf für eine Papiermaschine |
| US3652392A (en) * | 1969-11-24 | 1972-03-28 | Kimberly Clark Co | Contracting pre-slice flow distributor for papermaking machine headbox |
| US3661605A (en) * | 1970-06-08 | 1972-05-09 | American Home Prod | Release product |
| US3843470A (en) * | 1970-08-31 | 1974-10-22 | Beloit Corp | Flexible trailing elements in a paper-making machine headbox having projections thereon extending into the slurry flow |
| US3791918A (en) * | 1972-03-08 | 1974-02-12 | Valmet Oy | Headbox of a paper making machine having multiple, vertically inclined vanes |
| US3939037A (en) * | 1973-03-27 | 1976-02-17 | Beloit Corporation | Headbox with flexible trailing elements |
| AT331631B (de) * | 1973-07-13 | 1976-08-25 | Voith Gmbh J M | Stoffauflauf fur papiermaschinen u.dgl. |
| FI56987C (fi) * | 1976-08-20 | 1980-05-12 | Valmet Oy | System foer stabilisering av massasuspensionstroemmen i en hydraulisk inloppslaoda i en pappersmaskin |
| US4133713A (en) * | 1977-10-11 | 1979-01-09 | The Procter & Gamble Company | Microturbulence generator for papermachine headbox |
| DE2942966C2 (de) * | 1979-10-24 | 1984-04-26 | J.M. Voith Gmbh, 7920 Heidenheim | Stoffauflaufdüse |
| SE446889B (sv) * | 1980-08-05 | 1986-10-13 | Mitsubishi Heavy Ind Ltd | Inloppslada vid en pappersmaskin |
| EP0071118B1 (de) * | 1981-07-31 | 1986-03-12 | Mitsubishi Jukogyo Kabushiki Kaisha | Stoffströmungszerteiler |
| JPS602792A (ja) * | 1983-06-20 | 1985-01-09 | 三菱重工業株式会社 | 抄紙機のヘツドボツクス |
| US4566945A (en) * | 1984-04-11 | 1986-01-28 | Beloit Corporation | Headbox trailing element |
| DE3514554C3 (de) * | 1984-09-19 | 1998-01-08 | Escher Wyss Gmbh | Stoffauflauf-Vorrichtung für eine Papiermaschine und Verfahren zu deren Betrieb |
| US4687548A (en) * | 1984-10-31 | 1987-08-18 | Valmet Oy | Method and apparatus for controlling distortion of fibre orientation in a paper web |
| US4604164A (en) * | 1985-01-30 | 1986-08-05 | Mitsubishi Jukogyo Kabushiki Kaisha | Flow restraining elements in the headbox of a paper machine |
| JPH06102879B2 (ja) * | 1985-07-30 | 1994-12-14 | 石川島播磨重工業株式会社 | 抄紙機のヘツドボツクス |
| DE3535849A1 (de) * | 1985-10-08 | 1987-04-09 | Voith Gmbh J M | Stellvorrichtung fuer eine lippe eines papiermaschinen-stoffauflaufs |
| FR2631353A1 (fr) * | 1988-05-13 | 1989-11-17 | Semti | Dispositif d'alimentation en melange pateux |
| FI79363C (fi) * | 1988-09-26 | 1989-12-11 | Valmet Paper Machinery Inc | Foerfarande och anordning i inloppslaodan av en pappersmaskin foer att behaerska foerdelningen i pappersbanans fiberorientering. |
| FI82085C (fi) * | 1989-06-02 | 1991-01-10 | Valmet Paper Machinery Inc | Turbulensgenerator i inloppslaodan av en pappersmaskin. |
| US5030360A (en) * | 1989-09-13 | 1991-07-09 | Murray Grainger | Liquid-laden asbestos compactor and method for removing liquids from asbestos |
| US5183537A (en) * | 1991-10-07 | 1993-02-02 | Beloit Technologies, Inc. | Headbox tube bank apparatus and method of directing flow therethrough |
| JPH05132885A (ja) * | 1991-11-12 | 1993-05-28 | Mitsubishi Heavy Ind Ltd | 抄紙機のヘツドボツクス |
| DE4211291C3 (de) * | 1992-04-03 | 2001-06-07 | Voith Gmbh J M | Mischeinrichtung und Verfahren zum Mischen von zwei Flüssigkeiten bei konstantem Gemischvolumenstrom zur Versorgung des Stoffauflaufs einer Papiermaschine |
| DE4239643C2 (de) | 1992-11-26 | 1997-01-30 | Voith Gmbh J M | Drosselvorrichtung zur Drosselung einer Flüssigkeitsströmung |
| DE4318430C2 (de) * | 1993-06-03 | 1997-03-27 | Schultz Hans Joachim Dr Ing | Stoffauflaufsystem einer Papiermaschine |
-
1994
- 1994-09-20 DE DE4433445A patent/DE4433445C1/de not_active Expired - Lifetime
-
1995
- 1995-09-16 AT AT95114603T patent/ATE230453T1/de active
- 1995-09-16 DE DE59510520T patent/DE59510520D1/de not_active Expired - Lifetime
- 1995-09-16 EP EP95114603A patent/EP0708201B1/de not_active Expired - Lifetime
- 1995-09-19 FI FI954413A patent/FI113553B/fi not_active IP Right Cessation
- 1995-09-20 CA CA002158677A patent/CA2158677A1/en not_active Abandoned
-
1997
- 1997-02-13 US US08/799,443 patent/US5741401A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4019593A1 (de) * | 1990-06-20 | 1992-01-09 | Voith Gmbh J M | Stoffauflauf fuer papiermaschinen |
| DE4239644A1 (de) * | 1992-11-26 | 1994-06-01 | Voith Gmbh J M | Stoffauflauf einer Papiermaschine mit Welleneinsatz |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2158677A1 (en) | 1996-03-21 |
| US5741401A (en) | 1998-04-21 |
| ATE230453T1 (de) | 2003-01-15 |
| FI954413L (fi) | 1996-03-21 |
| FI113553B (fi) | 2004-05-14 |
| FI954413A0 (fi) | 1995-09-19 |
| DE59510520D1 (de) | 2003-02-06 |
| DE4433445C1 (de) | 1996-03-28 |
| EP0708201A1 (de) | 1996-04-24 |
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|---|---|---|---|
| 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 |
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| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT DE FR IT SE |
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| 17P | Request for examination filed |
Effective date: 19960807 |
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| 17Q | First examination report despatched |
Effective date: 19980605 |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: VOITH SULZER PAPIERTECHNIK PATENT GMBH |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: VOITH PAPER PATENT GMBH |
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