EP0936301A2 - Appareil pour l' alimentation d' une suspension de fibres sur un dispositif d' essorage - Google Patents

Appareil pour l' alimentation d' une suspension de fibres sur un dispositif d' essorage Download PDF

Info

Publication number: EP0936301A2
Authority: EP; European Patent Office
Prior art keywords: eccentric; eccentric shaft; adjustable; partition; layer
Prior art date: 1998-02-05
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.): Granted

Application number

EP98124784A

Other languages

German (de)

English (en)

Other versions

EP0936301B1 (fr

EP0936301A3 (fr

Inventor

Wilhelm Dipl.-Ing. Mausser

Manfred Ing. Schmid

Walter Writzl

Rudolf Dipl.-Ing. Greimel

Harald Weigant

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.)

Andritz AG

Original Assignee

Andritz Patentverwaltungs GmbH

Andritz AG

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.)

1998-02-05

Filing date

1998-12-29

Publication date

1999-08-18

1998-12-29 Application filed by Andritz Patentverwaltungs GmbH, Andritz AG filed Critical Andritz Patentverwaltungs GmbH

1999-08-18 Publication of EP0936301A2 publication Critical patent/EP0936301A2/fr

2000-02-23 Publication of EP0936301A3 publication Critical patent/EP0936301A3/fr

2003-11-26 Application granted granted Critical

2003-11-26 Publication of EP0936301B1 publication Critical patent/EP0936301B1/fr

2018-12-29 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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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
- 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
- D21F9/00—Complete machines for making continuous webs of paper
- D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type
- D21F9/006—Complete machines for making continuous webs of paper of the twin-wire type paper or board consisting of two or more layers

Definitions

the invention relates to a device for supplying a fiber suspension to a dewatering device, in particular for a tissue machine.
Devices of this type also called headbox
regulation of the flow rate of the fiber suspension can practically only be achieved via the pressure.
a different flow rate such as is required, for example, for different top and bottom qualities, cannot be achieved.
the aim of the invention is therefore to improve the field of application and the control options for headboxes.
the invention is therefore characterized in that one or more one-piece, wedge-shaped lamella tip (s) made of steel is or are provided for a two-layer or multi-layer headbox for separating the individual areas.
This makes it possible to achieve a stable separation and thus also a constant setting of the outlet gap heights even at different inlet pressures, so that a differential speed can be set between the individual suspension flows.
An advantageous development of the invention is characterized in that the lamella tip (s) are prestressed against the partition of the feed device by means of a tie rod. A particularly stable and therefore exact adjustment of the outlet gap heights is possible.
a favorable embodiment of the invention is characterized in that the distance from the lower lip and / or upper lip to the slat tip is adjustable.
An advantageous embodiment of the invention is characterized in that an eccentric shaft is provided for adjusting the height of the outlet gap between a minimum and maximum value. By adjusting the height of the outlet gap, the flow rate of the suspension stream can be adapted to the end product in accordance with the requirements.
the use of an eccentric ensures a very precise adjustment of the outlet gap height.
a favorable further development of the invention is characterized in that the upper lip can be adjusted by means of an eccentric, whereby alternatively or additionally the lower lip can be adjusted by means of an eccentric. The adjustment of the upper and / or lower lip enables the optimal conditions for regulating the flow rate of the individual layers, depending on the design as a two- or multi-layer headbox.
a favorable embodiment of the invention is characterized in that a partition-lamella tip unit can be adjusted by means of an eccentric.
An advantageous embodiment of the invention is characterized in that the eccentric shaft is supported several times over the width of the machine, wherein the support can take place at regular intervals.
a favorable development of the invention is characterized in that the eccentric shaft is connected to a geared motor. This means that the outlet height and thus the flow rate of the fiber suspension can be adjusted or regulated accordingly, even during operation of the paper machine.
FIG. 1 shows a device for supplying fiber suspensions to a dewatering device, in particular for a tissue machine, in the form of a two-layer headbox.
the suspension is fed in simultaneously via two channels 1 transversely to the machine direction, then the flow direction of the suspension is 90 degrees redirected in the machine direction.
the suspension is then passed through two turbulence generator chambers 2 into the outlet chambers 3, 4 designed as nozzle spaces, at the end of which it leaves the device and strikes the dewatering device.
the two nozzle spaces 3, 4 are separated by a wall 8 which is prestressed against the supporting body 10 by means of drilled screws 9.
the partition 8 At the outlet end of the partition 8 there is a one-piece, wedge-shaped lamella tip 12 made of stainless steel, which is prestressed against the partition 8 by means of tie rods 13.
the partition 8 and the lamella tip 12 form a solid separating element between the two nozzle spaces 3, 4 in the assembled state. Due to its pretensioning relative to the supporting body 10, different operating pressures (up to 0.5 bar) and thus different flow rates of the fiber suspension in both are possible Use layers. For this purpose, it is necessary to set the outlet gap heights a and b of the two nozzle chambers 3, 4 differently. For this purpose, the upper lip 18 or lower lip 18 'are pivoted about the joints 14, 14'.
This pivoting movement is carried out by an eccentric shaft 16, 16 ', which are supported over the machine width, at regular intervals in bearings 17, 17' on the rigid cover plates 20, 20 'of the device.
the eccentricity e of the shafts allows the gap heights a and b to be set between a minimum and a maximum value.
the construction is designed in such a way that even with constant rotation of the eccentric shaft 16, 16 'by a drive 22, the upper lip 18 and the lower lip 18' never come into contact with the lamella tip 12 and therefore no damage can occur.
the contour angle ⁇ in the two-layer headbox is smaller than in the case of conventional adjustments using geared motors.
FIG. 1a shows a detail of the outlet gap in FIG. 1. The different sizes of the outlet gaps a (nozzle space 3) and b (nozzle space 4) can be clearly seen here.
the suspension simultaneously via three channels 1 transversely to the machine direction in the Vorrich device, then the flow direction of the suspension is deflected by 90 degrees in the machine direction.
the suspension then flows through three turbulence generating chambers 2 into the nozzle chambers 3, 4, 5 called outlet chambers, at the end of which they leave the device and hit the dewatering machine.
it is injected between two screens 24, 24 'which run around two rollers 25, 25'.
the two nozzle spaces 4, 5 are separated by a wall 8, at the end of which there is a one-piece, wedge-shaped lamella tip 12 made of stainless steel.
the partition 8 and the lamella tip 12 form a firm, non-adjustable separating element between the two nozzle spaces 4, 5. Its prestressing relative to the support body 10 enables differences of up to 0.5 bar and thus different flow rates of the fiber suspensions in to achieve two layers.
the two nozzle spaces 3, 4 are separated by a partition 6, which is rotatably mounted about an axis 7.
a partition 6 which is rotatably mounted about an axis 7.
At the outlet-side end of the partition 6 there is also a one-piece lamella tip 12 'made of stainless steel, which is prestressed against the partition 6 by means of tie rods 11.
the partition 6 and the lamella tip 12 'thus form a rigid separating element which, however, can be pivoted as a whole about the axis of rotation 7.
This pivoting movement is carried out by an eccentric shaft 15, which are supported at regular intervals in bearings 19 on the rigid rear wall 23 of the device over the machine width.
the eccentricity e makes it possible to set the outlet gap height c of the nozzle chamber 4 between a minimum and a maximum value and to fix it.
the outlet gap heights a and b of the two nozzle chambers 3 and 5 can also be set and fixed between a minimum and maximum value.
the upper lip 18 or lower lip 18 ' are pivoted about the joints 14, 14'.
This pivoting movement is carried out by an eccentric shaft 1, 16 ', which are supported over the machine width at regular intervals in bearings 17, 17' on the rigid cover plates 20, 20 'of the device.
the eccentricity e of the shafts 16, 16 ' enables the gap heights a and b to be set between a minimum and a maximum value.
the construction is designed in such a way that even with constant rotation of the eccentric shafts 16, 16 'by a drive 22, the upper lip 18 and the lower lip 18' never come into contact with the lamella tips 12, 12 'and therefore no damage can occur. This also applies to all positions of the movable partition 6 with lamella tip 12 '.
the contour angle ⁇ in the three-layer headbox is smaller than in the case of conventional adjustments using geared motors.
FIG. 2a shows a detail of the outlet gap in FIG. 2.
the different settings of the outlet gap heights a (nozzle chamber 3), b (nozzle chamber 5) and c (nozzle chamber 4) can be seen.
Fig. 3 shows a section along line III-III in Fig. 1 and analogously in Fig. 2.
the eccentric shaft 16 is shown, which is supported several times over the machine width in bearings 17.
a geared motor 22 is also shown, with which the gap height of the outlet gap can be adjusted.
the invention is not restricted to the examples shown. Other types of lip adjustment can also be provided.

Landscapes

Paper (AREA)
Preliminary Treatment Of Fibers (AREA)

EP98124784A 1998-02-05 1998-12-29 Appareil pour l' alimentation d' une suspension de fibres sur un dispositif d' essorage Expired - Lifetime EP0936301B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
AT0020698A AT406171B (de)	1998-02-05	1998-02-05	Vorrichtung zur zufuhr einer faserstoffsuspension auf eine entwässerungseinrichtung
AT20698		1998-02-05

Publications (3)

Publication Number	Publication Date
EP0936301A2 true EP0936301A2 (fr)	1999-08-18
EP0936301A3 EP0936301A3 (fr)	2000-02-23
EP0936301B1 EP0936301B1 (fr)	2003-11-26

Family

ID=3484304

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP98124784A Expired - Lifetime EP0936301B1 (fr)	1998-02-05	1998-12-29	Appareil pour l' alimentation d' une suspension de fibres sur un dispositif d' essorage

Country Status (6)

Country	Link
US (1)	US6368464B1 (fr)
EP (1)	EP0936301B1 (fr)
AT (1)	AT406171B (fr)
BR (1)	BR9900531A (fr)
DE (1)	DE59810270D1 (fr)
ES (1)	ES2210654T3 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2615374A (en) *	1948-10-04	1952-10-28	Dominion Eng Works Ltd	Slice assembly for papermaking machines
SE7707981L (sv) *	1976-12-02	1978-06-03	Ahlstroem Dev Gmbh	Anordning for paverkan av ett banformigt material
FI58364C (fi) *	1977-07-13	1981-01-12	Tampella Oy Ab	Matningsanordning foer en banformningsmaskin foer framstaellning av en tvao- eller flerskiktig fiberbana
DE3010730C2 (de) *	1980-03-20	1983-01-05	J.M. Voith Gmbh, 7920 Heidenheim	Stoffauflauf für eine Papiermaschine
DE3348218C2 (fr) *	1983-06-09	1990-05-10	Sulzer-Escher Wyss Gmbh, 7980 Ravensburg, De
CH672515A5 (fr) *	1987-02-02	1989-11-30	Escher Wyss Gmbh
DE3807629A1 (de) *	1988-03-09	1989-09-21	Escher Wyss Gmbh	Vorrichtung zum halten einer trennlamelle
EP0681057B1 (fr) *	1994-04-29	2002-08-28	Voith Paper Patent GmbH	Caisse de tête à plusieurs couches
DE4440079C2 (de) *	1994-11-10	1997-10-02	Voith Sulzer Papiermasch Gmbh	Mehrschichten-Stoffauflauf
DE19652982A1 (de) *	1996-12-19	1997-05-22	Voith Sulzer Papiermasch Gmbh	Lösbare Verbindungsvorrichtung zum Trennelement eines Mehrschichtenstoffauflaufes
DE19652983A1 (de) *	1996-12-19	1997-05-28	Voith Sulzer Papiermasch Gmbh	Trennelement eines Mehrschichtenstoffauflaufes

1998
- 1998-02-05 AT AT0020698A patent/AT406171B/de not_active IP Right Cessation
- 1998-12-29 EP EP98124784A patent/EP0936301B1/fr not_active Expired - Lifetime
- 1998-12-29 ES ES98124784T patent/ES2210654T3/es not_active Expired - Lifetime
- 1998-12-29 DE DE59810270T patent/DE59810270D1/de not_active Expired - Lifetime
1999
- 1999-02-04 BR BR9900531-0A patent/BR9900531A/pt not_active IP Right Cessation
- 1999-02-05 US US09/245,542 patent/US6368464B1/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
AT406171B (de)	2000-03-27
BR9900531A (pt)	2000-02-22
US6368464B1 (en)	2002-04-09
DE59810270D1 (de)	2004-01-08
EP0936301B1 (fr)	2003-11-26
EP0936301A3 (fr)	2000-02-23
ATA20698A (de)	1999-07-15
ES2210654T3 (es)	2004-07-01

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