EP0830478B1 - Vorrichtung zur stabilisierung einer papierbahn in einer papiermaschine im bereich einer walze - Google Patents

Vorrichtung zur stabilisierung einer papierbahn in einer papiermaschine im bereich einer walze Download PDF

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Publication number
EP0830478B1
EP0830478B1 EP97915462A EP97915462A EP0830478B1 EP 0830478 B1 EP0830478 B1 EP 0830478B1 EP 97915462 A EP97915462 A EP 97915462A EP 97915462 A EP97915462 A EP 97915462A EP 0830478 B1 EP0830478 B1 EP 0830478B1
Authority
EP
European Patent Office
Prior art keywords
belt
roll
box
paper web
roller
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
Application number
EP97915462A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0830478A1 (de
Inventor
Andreas Meschenmoser
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.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
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 Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0830478A1 publication Critical patent/EP0830478A1/de
Application granted granted Critical
Publication of EP0830478B1 publication Critical patent/EP0830478B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0272—Wet presses in combination with suction or blowing devices

Definitions

  • the invention relates to a paper machine with a device to stabilize a paper web in the area of a roller, up to which the paper web on an air permeable belt is guided with one in front of the roller on the paper web opposite side of the tape extending box, the Interior is open to the belt and in which a vacuum to Suction of the paper web on the tape can be generated, the Box at its front end as seen in the direction of web travel sealed against the tape with a sealing strip through which the air entrained by the belt moves away from the belt and along an air deflector surface provided on the box is distracted.
  • Such a paper machine is known from US-A-5 238 535 known. After that is in the press section of a paper machine a paper web on an air-permeable belt to a suction roll guided. To stabilize to cause the paper web in the area of the suction roll, a suction box is provided, which is in front of the suction roller extends to this and the one seen in its web running direction front end by means of a sealing strip opposite the air-permeable tape is sealed through which the Air carried by the belt away from the belt and along an front end of the box provided air deflector surface deflected becomes.
  • DE-A-35 04 820 which is relates to a dryer section of a paper machine, is in the area before the transfer of the paper web to the Roller creates a vacuum, through which the paper web to the Tape is sucked in, so that the formation of bubbles is counteracted becomes.
  • the object of the invention is therefore a paper machine with a device for stabilizing a paper web to create in the area of a roller up to which the paper web is guided on an air-permeable belt, with which a Blistering even with high-speed paper webs with low Basis weights are safely avoided and a safe one Belt guidance can be guaranteed in a cost-effective manner.
  • the one entrained by the paper web or the tape Airflow itself exploited the negative pressure inside of the box.
  • the air deflector surface to deflect the entrained air used to create a vacuum within a suction slot of the box.
  • the Avoiding the necessary vacuum within the bubbles Box produced in a particularly simple way, as a blower is not required.
  • the air deflector surface has the Invention a curvature directed outwards from the band, whereby a good suction effect is achieved.
  • the suction slit is on a rear end of the box seen in the direction of web travel.
  • the invention to arrange the suction slot so that he the deflector surface interrupts, whereby an improved suction effect is achieved becomes. It is particularly advantageous to use the suction slot on to form the beginning of the deflector surface seen in the direction of web travel, because here the air carried by the belt has the highest speed and therefore has a particularly high vacuum the suction slot can be generated.
  • the band is passed over a second roller, the paper web from the belt on the first roller or a second belt guided over it is handed over.
  • the device according to the invention is special advantageously used in the area of a nip with which the transfer of the paper web from the belt to the first roller takes place, the critical blistering precisely in this area through the device according to the invention in particular simple and inexpensive way is avoided.
  • the band is over guided a second roller, the interior of the box is sealed against the second roller.
  • the box is in an advantageous development Invention sealed by a sealing strip against the second roller.
  • This measure will improve the sealing of the Box guaranteed against the belt or the second roller.
  • the first roller can be used as a guide roller,
  • a guide roller For example, be designed as a suction guide roller, via which a press felt or a smooth belt is guided, and the second roller as Felt guide roller can be formed, via which the also as Press felt formed tape is guided, from which the paper web passed to the other press felt.
  • the first roller can also be used as a press roller Screen guide roller, designed as a smoothing roller or as a drying cylinder whereupon the paper web is handed over from the belt.
  • Fig. 1 is a section of a press section Paper machine shown in which a paper web 18, which on a band 20 formed as a press felt, from which Band 20 is transferred to a press felt 24, which has a designed as a suction roll rotates and from there on a subsequent press roller 16 is passed.
  • the belt 20 is arranged shortly behind the suction roller 12 Felt guide roller 14 guided and deflected. In that area in front of the two rollers 12, 14 is one below the belt 20 Device 10b according to the invention for stabilizing the paper web 18 arranged substantially parallel to the belt 20 extends over the entire width of the paper web 18.
  • the device 10b is provided.
  • the box 11 extends below the Band 20 over the entire width of the paper web until just before Roll 14 seen at its in the web running direction 26 the front end is the box 11 through a sealing strip 40 sealed against the band 20.
  • the air flow 30 on the underside of the belt 20 is used to generate a negative pressure in the enclosed space between the box 11 and the belt 20.
  • the air flow 30 is deflected downward from the underside of the band 20 by the sealing strip 40, which extends over the entire width of the web, and is deflected along a curved air deflector surface 48, as indicated by the arrows 51.
  • the sealing strip 40 which extends over the entire width of the web, and is deflected along a curved air deflector surface 48, as indicated by the arrows 51.
  • On the underside of the box 11 there is a wall 50 shielding from the roller 14, which prevents the air entrained by the roller 14 from flowing against it.
  • the air flow emerging downward in the direction of arrow 54 thus results in a diffuser effect which leads to the formation of a negative pressure in a suction slot 52 which is formed between the lower end of the air deflector surface 48 and the wall 50, so that there is in the enclosed interior space 39 of the box 11, which is closed off by the underside of the band 20, by the air deflector surface 48 and by the wall 14 and on the end face by end sealing plates, a somewhat reduced pressure is set, which is denoted in FIG. 1 by p 2 . Since a slightly increased pressure occurs in the area above the paper web 18 in front of the felt nip 13, which is denoted by p 1 in FIG. 1, a pressure drop p 2 -p 1 results which leads to the formation of an air flow in the direction of the arrows 38 the band 20 leads downwards and emerges from the box 11 through the suction slot 52 in the direction of the arrow 54 downwards.
  • the box 11 is on the face of the driver and the front to the belt 20 and to the roller 14 each through an end sealing plate sealed with a minimal set gap.
  • FIG. 2 A modification of the one previously described with reference to FIG. 1 Execution is shown in Fig. 2. With the total with The device designated by number 10c in turn becomes the air flow 30 from the underside of the band 20 through the sealing strip 40 deflected downwards and by means of the over the entire web width extending downward curved Deflector surface 48 is deflected downward in the box 11 generate a negative pressure.
  • the suction slot 52 is not at the end of the deflector surface 48, but arranged at the beginning of the deflector surface 48, and indeed directly behind the sealing strip 40 through which the Box 11 opposite the belt 20 at its in the direction of web travel 26 seen front end is sealed.
  • the interior 39 of the Box is at its end facing the second roller 14 sealed against the second roller 14 by a wall 50, which is adjustable relative to the roller 14. Again it is Box 11 sealed on the front side on the driver and drive side.
  • the interior 39 is thus sealed well guaranteed towards the outside and towards the second roller 14, while by the arrangement of the suction slot 52 at the beginning of the deflector surface 48 a particularly good suction effect is achieved.
  • the suction slit 52 extends from the air deflector surface 48 extends to the inside of the box, into one Boundary surface 55 above that in the interior 49 of the box 11 initially runs approximately parallel to band 20 and finally angled approximately at right angles from the band 20 downwards and then at its lower end through the wall strip 42 is sealed from the second roller 14.
  • Through the Air deflector surface 48 and the boundary surface 55 is formed such a completely closed volume with an approximately triangular cross-section that defines the interior 39 of the box 11 reduced and thus the negative pressure effect within the Interior 39 significantly enlarged.
  • FIG 3 shows a section of a paper machine in the area the transfer from a wire section 65 to a subsequent one Press section 78 shown.
  • the paper web 18 is in the wire section 65 on the as a wire trained band 20 guided over screen drive rollers 60, 61.
  • a device according to the invention 10d arranged, which is similar to the embodiment of FIG. 2nd can be trained.
  • a suction Through the box 11 is a suction the paper web 18 reaches the belt 20 so that the screen drive roller 60, over which the sieve is passed, not as Suction roll must be designed, which leads to corresponding cost savings leads.
  • the paper web 18 is then removed from the screen in a manner known per se by means of a screen roller Removal roller 64 removed and between an upper felt 68 and a bottom felt 70 passed through a first press nip, that of a shoe press with one arranged above Shoe press roll 72 and one arranged below it Counter roll 74 is formed.
  • the upper felt 68 runs in known Way over a felt guide roller 62, the removal roller 64 through the press nip and is after the press nip through a felt guide roll 76 deflected.
  • the bottom felt 70 is passed through a felt guide roller 66 shortly behind the take-off roller 64 to the paper web 18 introduced.
  • FIG. 4 Another possible application of the invention is shown in FIG. 4 shown.
  • the device 10e according to the invention is whose structure can correspond to device 10c according to FIG. 2, on the inlet side of the paper web 18 in a press nip 85 arranged, for example by a free-standing shoe press 12, 14 can be formed with a shoe press roll below.
  • the paper web 18 is supported by a roller 80, which is the central roller the press section can be by means of a take-off roller 82 removed and then onto the belt formed as a bottom felt Pass 20, which is guided over felt guide rollers 84, 87.
  • a take-off roller 86 removed from the roller 12 and then in hand over a downstream dryer section, not shown.
  • roller 80 and the roller 12 are in a manner known per se cleaned by scraper 88, 89.
  • the paper web is on the belt formed as a press felt 20 via a front felt guide roller 90 and the rear Guided felt roller 14 and from the belt 20 to the smooth Press roller trained roller 12 passed.
  • a device according to the invention arranged, which is designated overall by the number 10f and depending on the requirements of FIG. 1 or can be designed according to FIG. 2.
  • the device 10f with active fan support is carried out, is still at the rear end of the device when viewed in the direction of web travel 10f generates a certain overpressure by which the transfer of the Paper web on the roller 12 is supported.
  • roller 12 is also of a different type Rollers such as a smoothing roller or a drying cylinder can act.
EP97915462A 1996-04-06 1997-03-29 Vorrichtung zur stabilisierung einer papierbahn in einer papiermaschine im bereich einer walze Expired - Lifetime EP0830478B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19613939A DE19613939A1 (de) 1996-04-06 1996-04-06 Vorrichtung und Verfahren zur Stabilisierung einer Papierbahn in einer Papiermaschine im Bereich einer Walze
DE19613939 1996-04-06
PCT/EP1997/001604 WO1997038163A1 (de) 1996-04-06 1997-03-29 Vorrichtung und verfahren zur stabilisierung einer papierbahn in einer papiermaschine im bereich einer walze

Publications (2)

Publication Number Publication Date
EP0830478A1 EP0830478A1 (de) 1998-03-25
EP0830478B1 true EP0830478B1 (de) 2002-06-26

Family

ID=7790749

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97915462A Expired - Lifetime EP0830478B1 (de) 1996-04-06 1997-03-29 Vorrichtung zur stabilisierung einer papierbahn in einer papiermaschine im bereich einer walze

Country Status (5)

Country Link
EP (1) EP0830478B1 (ja)
JP (1) JPH11508000A (ja)
AT (1) ATE219807T1 (ja)
DE (2) DE19613939A1 (ja)
WO (1) WO1997038163A1 (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19643814A1 (de) * 1996-10-30 1998-05-07 Voith Sulzer Papiermasch Gmbh Vorrichtung zur Führung einer Papierbahn auf einem Band
FI112267B (fi) 1998-09-29 2003-11-14 Metso Paper Inc Laite paperikoneessa rainan päänvientinauhan kuljetuksessa ja ohjauksessa
DE10112053A1 (de) * 2001-03-14 2002-09-19 Voith Paper Patent Gmbh Saugkasten
DE102004038769A1 (de) * 2004-08-09 2006-02-23 Voith Fabrics Patent Gmbh Vorrichtung zur Bahnstabilisierung
JP5000388B2 (ja) * 2007-06-13 2012-08-15 メッツォ ペーパー インコーポレイテッド 湿紙の再湿抑制方法及び装置
FI122309B (fi) * 2008-03-28 2011-11-30 Metso Paper Inc Menetelmä ja laitteisto kuiturainaradan siirtämiseksi tukikudokselta toiselle
FI11272U1 (fi) * 2016-05-04 2016-06-06 Valmet Technologies Oy Sovitelma rainanhallinnassa kuiturainakoneen kuivatusosalla

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5438765A (en) * 1991-11-05 1995-08-08 Valmet Paper Machinery Inc. Method and apparatus for eliminating the flutter of a paper web in the dryer section of a papermaking machine between two single felt configurations therein

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI69332C (fi) * 1984-03-02 1986-01-10 Valmet Oy Anordning i torkningspartiet av en pappersmaskin
FI69145C (fi) * 1984-07-05 1985-12-10 Valmet Oy Anordning i en pappersmaskin vid transport och styrning av banans spetsdragningsband
DE3739338C2 (de) * 1987-11-20 1995-09-07 Voith Gmbh J M Luftleitkasten zum Stabilisieren des Laufs einer Warenbahn, insbesondere einer Papierbahn
DE4116222A1 (de) * 1991-05-17 1992-11-19 Voith Gmbh J M Bahnabnahme-vorrichtung
DE4402105A1 (de) * 1994-01-26 1994-06-09 Voith Gmbh J M Verfahren zum Betreiben einer Pressenpartie einer Maschine zur Herstellung endloser Faserstoffbahnen, insbesondere einer Papiermaschine und Vorrichtung zur Durchführung dieses Verfahrens

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5438765A (en) * 1991-11-05 1995-08-08 Valmet Paper Machinery Inc. Method and apparatus for eliminating the flutter of a paper web in the dryer section of a papermaking machine between two single felt configurations therein

Also Published As

Publication number Publication date
DE19613939A1 (de) 1997-10-09
WO1997038163A1 (de) 1997-10-16
ATE219807T1 (de) 2002-07-15
JPH11508000A (ja) 1999-07-13
DE59707591D1 (de) 2002-08-01
EP0830478A1 (de) 1998-03-25

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