WO2013034330A1 - Dispositif de transfert et de stabilisation d'une bande de matière fibreuse - Google Patents

Dispositif de transfert et de stabilisation d'une bande de matière fibreuse Download PDF

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Publication number
WO2013034330A1
WO2013034330A1 PCT/EP2012/062879 EP2012062879W WO2013034330A1 WO 2013034330 A1 WO2013034330 A1 WO 2013034330A1 EP 2012062879 W EP2012062879 W EP 2012062879W WO 2013034330 A1 WO2013034330 A1 WO 2013034330A1
Authority
WO
WIPO (PCT)
Prior art keywords
web
clothing
stabilizing
stabilizing element
suction
Prior art date
Application number
PCT/EP2012/062879
Other languages
German (de)
English (en)
Inventor
Daniel Gronych
Ute Lukschanderl
Original Assignee
Voith 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 Patent Gmbh filed Critical Voith Patent Gmbh
Priority to CN201280043299.8A priority Critical patent/CN103764907B/zh
Priority to EP12733462.1A priority patent/EP2753752B1/fr
Publication of WO2013034330A1 publication Critical patent/WO2013034330A1/fr

Links

Classifications

    • 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
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip
    • 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
    • D21F1/48—Suction apparatus
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F2/00—Transferring continuous webs from wet ends to press sections

Definitions

  • the invention relates to a device for transferring and stabilizing a moving fibrous web, in particular a paper, board or tissue web, wherein the fibrous web along the web travel path is initially in a first sandwich area between a web-issuing and a web-receiving clothing, then in a transfer line only the web-receiving clothing is located and thereafter in a second sandwich area between the web-receiving and a further clothing and wherein a stationary suction element is provided on the web-facing side of the web-receiving fabric having at least one suction zone in the first sandwich area and at least one suction zone in the region of the transfer line ,
  • the device can be used, for example, in pulp, paper, board or tissue machines.
  • the object of the invention is to develop a simple, reliable and low-wear device for transfer and stabilization, in which the Fiber web, especially at the edges is better managed and less web running problems occur, but still less wear on the fabrics is caused.
  • the object is achieved in that a stabilizing element is provided with a convex surface on the web-facing side of the web-receiving clothing after the nipple element, so that together with the nipple a predominantly or fully curved Bahnlaufweg results from the end of the first sandwich area at least up to a point A, which is between 20 and 150 mm, preferably between 20 and 100 mm, before the beginning of the second sandwich area.
  • a point A which is between 20 and 150 mm, preferably between 20 and 100 mm, before the beginning of the second sandwich area.
  • the convex curvature of the stabilizing element adjoins directly after the curvature of the teat element without a straight line extending therebetween.
  • the safety distance S is chosen with a length in the web running direction of 20 to 150 mm, preferably from 20 to 100 mm so that a sufficient distance between the solid surfaces for the passage of fibrous web shreds or batzen is given and at the same time there is no longer a danger flutter the edges of the fibrous web or get up this short distance.
  • the straight part of the transfer line is usually longer than 1000 mm, which again and again leads to considerable web disturbances.
  • the suction element is preferably pivotable and / or linearly adjustable, so that at least one operating position and a raised position are adjustable.
  • the sucker element can be designed as a separating sucker, ie when the fibrous web is guided a longer distance between two fabrics and then to be taken on one of the two fabrics.
  • the sucker element can also be designed as a pickup sucker, which is the case when the web is only briefly passed between two clothing to pass the web from one to the other clothing.
  • the web-receiving clothing has a slightly higher speed than the web-dispensing clothing.
  • the convex surface of the stabilizing element can also be formed by a plurality of transversely arranged strips, so that the predominantly curved track running path is achieved in a polygonal course.
  • the stabilizing element can also be carried out with negative pressure acted upon.
  • a lower negative pressure By a lower negative pressure, a smaller amount of air is sucked, which is advantageous for the design of the periphery.
  • a higher negative pressure is adjustable than in the stabilizing element. As a result, for example, a higher negative pressure is only applied directly at the web transfer, while in the other areas only a lower negative pressure is sufficient.
  • the negative pressure should preferably be in the range between 10 and 40 kPa, more preferably between 10 and 30 kPa.
  • the negative pressure if it is evacuated, should preferably be between 0.5 and 20 kPa, more preferably between 0.5 and 15 kPa.
  • the aspiration of the sucker element is preferably carried out by the direct connection to a suction source.
  • the stabilizing element can either be aspirated by the direct connection to a suction or it is generated in the stabilizing element by means of a corresponding Blas Kunststoffdüse a negative pressure or the stabilizing element is connected to the sucker element, that the stabilizing element is indirectly sucked.
  • the stabilization element can also have a plurality of zones which can be acted upon with different negative pressure and are arranged one after the other in the web running direction.
  • a driven roller may be arranged in the clothing loop of the web-receiving clothing preferably in the running direction directly after the stabilizing element. It may be advantageous if the wrapping of the fabric on the driven roller is at least 40 °, more preferably at least 70 °. To be able to adjust the web tension even better, it is advantageous if a speed difference of at least + 0.2%, more preferably of at least + 0.5%, between the web-dispensing and web-receiving clothing and / or between the web-receiving and the other Covering is adjustable.
  • the wear of the fabric can be significantly reduced, in the web running direction in front of the nipple element and / or before the stabilizing element a lubricating spray pipe or a water bag is arranged for lubrication.
  • the lubricating spray pipe can be designed as a low-pressure spray pipe, which applies water evenly over the suction width or the width of the clothing.
  • the water bag must be designed so that it is always refilled with water and the fabric is moistened throughout.
  • a lubricating spray pipe or a water bag for lubrication can be arranged.
  • the surface of the teat element or of the stabilizing element which comes into contact with a string, is not damaged or worn too quickly, the surface may preferably consist of a temperature-resistant, in particular also temperature-shock-resistant material, in particular ceramic.
  • the side of the sucker element and the stabilization element facing the clothing has openings, in particular slots and / or bores, via which the negative pressure can act on the clothing and on the fibrous web.
  • the openings are in an area that is narrower than the width of the fabric.
  • the sucker element may have a convex surface on the side facing the clothing.
  • the covering surface of the suction element facing the covering may be concave and on the side of the web dispensing covering opposite the suction element, a guide roller may be arranged, preferably in the vertical and / or horizontal direction is adjustable. Due to the concave design, the friction is greatly reduced and the guide roller nevertheless sets a predetermined web travel path.
  • adjusting device of the guide roller both a fine adjustment of the distance or the contact pressure on the suction element, as well as the gusset geometry in the web transfer can be done, as well as, for example, an adjustment between transfer and operating position.
  • Suction member connected sealing strips provided transversely to the web travel, which can adapt to the contour of the guide roller and can be pressed in particular. This can be achieved with springs, elastic elements or pneumatic elements. Furthermore, also the
  • Suction element consists of several parts that are flexibly interconnected so that they can adapt to the contour of the guide roller and
  • the stabilizing element can be designed as a standing box. He is not moved in relation to the orbital movement of the clothing. Particular attention must be paid to wear in this design.
  • In order to claim a small space and to allow flexible determination of the gusset geometry in the web transfer, which comes into contact with the fabric surface of the stabilizing element can be curved with at least two different radii.
  • the stabilizing element may be designed as a rotating roller.
  • the rotating roller may in particular be equipped with a drive. Since this roller only as a stabilizing element without or only with a lower vacuum and not as a high vacuum roll, as it is necessary for the web separation or web transfer must be performed, it can be made simpler and thus cheaper.
  • the roller can be directly aspirated or indirectly, by being connected to the suction element via openings and is sucked by this with.
  • the sealing between roller and suction element is preferably carried out via sliding seals, for example via one or more blades which extend across the width, and over side shields, which may consist of plastic, preferably of PU, PE or Teflon.
  • On the rotating roller is preferably a Grenzluftabstreifer, for example in the form of a scraper blade provided, which repels entrained air from the roll shell, so that they are not in the region of the suction element
  • Sucker and the running as a rotating roller stabilization element can be connected, in particular by a common support body that they are jointly adjustable or swung.
  • the stabilizing element embodied as a rotating roller and / or the guide roller arranged opposite the concave suction element have a soft polymer cover or a soft polymer coating or a soft polymer surface, preferably one Softness of more than 0 P & J, more preferably of more than 3 P & J is equipped.
  • Stabilization element and / or arranged opposite the concave suction element guide roller have an open storage volume at the surface, in particular in the form of grooves, preferably with a groove depth between 1, 5 and 15 mm and preferably with a groove width between 0.5 and 2 mm.
  • the inventive device can be particularly advantageous in a press section of a machine for producing a fibrous web, in particular a paper, board or tissue web with two separately standing, in the web running direction successively arranged press nips, each consisting of a press roll, in particular shoe press roll, and a counter roll will be used.
  • the device is provided between the two press nips, wherein the press section is designed so that the center of the press roll of the first press nip is equal to or higher than the center of the press roll of the second press nip and the center of the counter roll of the first press nip equal to or higher lies as the center of the counter roll of the second press nip.
  • the press section can be designed with two shoe press nips or with a roller nip and a shoe press nip. Likewise, a further press nip may be provided before or after the two press nips.
  • Embodiment of the device with rotating stabilizing element in Figure 4 yet another preferred embodiment of the device with a concave suction element and rotating stabilizing element in a press section
  • the two press nips 7.8 of a press section are shown, which are each formed by a press roller 1 1, 13 and a counter-roller 12,14.
  • the centers of the rolls of the first press nip 7 are each higher than the centers of the corresponding rolls of the second press nip 8.
  • the fibrous web 1 is taken over by a pickup suction roll 9 on the fabric 2 and thus in the press section.
  • the fibrous web 1 is dewatered in the first press nip 7 and then further transported a piece in the sandwich.
  • the convex Sucker 30 fixes the fibrous web 1 on the fabric 3 before the fabric 2 is lifted and is led away around the guide roller 16.
  • the separation point of the two fabrics 2 and 3 can be moved on the sucker element 30.
  • the transfer follows the transfer line, on which the fibrous web 1 is guided freely on the fabric 3.
  • the teat element 30 still extends a distance into the transfer section.
  • the standing convex stabilization element 40 so that there is a continuous curvature of the transfer path.
  • the fibrous web 1 is held by the web tension due to the curvature and, if present on the negative pressure of the stabilizing element 40, which may be lower than that of the sucker element 30, reliably on the fabric 3 until it is again passed between two fabrics 3 and 4.
  • the driven guide roll 17, which follows the next element in the string loop on the stabilizing element 40, pulls on the fabric 3, so that no compression caused by the braking action of the suction and stabilizing elements.
  • the fibrous web 1 is taken over on the fabric 4.
  • a sufficient distance between the stabilizing element 40 and the suction element 31 so that shreds and chunks, which may arise, for example, during transfer after a break or a standstill, pass through without damaging the clothing or the surfaces of the suction or stabilizing elements .
  • a safety distance S measured in the direction of the web travel path, between the end of the fabric-contacting surface of the stabilization element 40 and the beginning of the second sandwich region on the sucker element 31 is provided. The safety distance S is explained further in FIG. 1a.
  • the clothing 4 can run faster than the clothing 3, preferably at least 0.2%, particularly preferably at least 0.5% faster.
  • the sandwich area between covering 3 and 4 again follows a transfer section on which the fibrous web 1 is guided freely on the covering 4.
  • the stabilizing element 41 connects, so that here too the curvature is maintained throughout until the fibrous web 1 between the fabric 4 and 5 is guided to the second press nip 8.
  • Adhering to the fabric 5, the fibrous web 1 is guided to the next transfer point and taken there by the pickup suction roll 10 on the fabric 6 of the next group.
  • the fabric 6 may be, for example, a felt of another press or a dryer fabric of the first dryer group.
  • both the arrangement of sucker element 30 and stabilizing element 40, as well as the arrangement of sucker element 31 and stabilizing element 41 represent a device according to the invention.
  • the fabric 2 is the web-dispensing, the fabric 3, the web-receiving and the clothing 4, the further clothing.
  • the fabric 3 is the web-dispensing, the fabric 4, the web-receiving and the fabric 5, the further clothing.
  • the coverings 2, 3, 4 are preferably felts, and the cover 5 is preferably a semipermeable or water-impermeable transfer belt.
  • the fabric 5 may alternatively be a felt.
  • lubricating spray pipes 50, 51, 52 are provided, which apply low-pressure water to the inside of the clothing just before they are pulled over the standing elements.
  • the spray tube can be equipped with several, possibly overlapping nozzles. It can also be moved oscillating in the transverse direction.
  • individual or all guide rollers 16, 17, 18, 19 should be adjustable and / or pivotable.
  • 1a illustrates the safety distance S, which extends from the point A, the course of the covering 3 from the stabilizing element 40, to the beginning of the second sandwich area, which is formed by the covering 3 and 4 on the suction element 31.
  • a preferred length for the safety distance S a value between 20 and 150 mm, more preferably between 20 and 100 mm has been found.
  • FIG. 2 shows a further embodiment according to the invention, in which the sucker element 32 has a concave surface. This significantly reduces the friction to the clothing. About the employment or contact pressure on the guide roller 16 of the web travel path is still specified. Subsequent to the sucker element 32, the stabilizing element 42, which has changing radii of curvature, follows directly to keep the required space as small as possible. The transfer of the fibrous web 1 on the fabric 4 is carried out with a concave suction element 33, where it was previously performed in sandwich on the rotating stabilizing element 43. In this configuration, no appreciable speed differences between clothing 3 and 4 are possible.
  • FIG. 3 is an embodiment with a convex suction element 30 combined with a rotating roller as stabilizing element 44.
  • the suction element 30 is preferably designed so that it is arranged as close as possible to the roller 44 and that the curvature of the transfer path on the roller 44 continues.
  • the roller 44 and suction member 30 may be connected so that the roller 44 is sucked by the suction member 30. They can also be connected in such a way that they can be swung together or moved together.
  • the transfer to covering 4 takes place with a further convex suction element 31. In the subsequent further transfer section, the fibrous web 1 is held by a further roller as Stabilmaschineselennent 45.
  • 3a illustrates the safety distance S which extends from the point A, the course of the covering 3 from the stabilizing element 44, to the beginning of the second sandwich area, which is formed by the covering 3 and 4 on the suction element 31.
  • FIG. 4 shows a similar embodiment as in Figure 3, in which the convex suction elements have been replaced by concave suction elements 32 and 34.
  • the stabilizing elements are again designed as rotating rollers 44, 45.
  • FIG. 5 shows a design as in FIG. 3 with convex suction elements 30, 31, in which, however, a stabilizing element 46 follows after the stabilizing element 45 which is designed as a roller, so that a predominantly or completely curved path also occurs on the second transfer path Web run on the string 4 results.
  • the arrangement of suction element 31 and the stabilizing elements 45 and 46 is a device according to the invention.
  • FIG. 6 again shows an embodiment similar to that according to FIG. 4 with concave suction elements 32, 34.
  • the stabilizing element 45 designed as a roller is followed by a stationary stabilizing element 46, so that a predominantly or completely curved path running on the covering 4 also results on the second transfer path.
  • the arrangement of suction element 34 and the stabilizing elements 45 and 46 is a device according to the invention.
  • the stabilizing element 44 designed as a rotating roller and the following guide roller 17 with drive are shown. Furthermore, preferably only the rotating stabilizing element 44 or particularly preferably only the guide roller 17 may have a drive in order to ensure sufficient tension both in the Covering as well as in the fibrous web to provide.
  • the convex surface of the stationary stabilizing elements and / or the suction elements can also be formed by a plurality of transversely arranged strips, so that the predominantly curved track running path is achieved in a polygonal course.

Landscapes

  • Treatment Of Fiber Materials (AREA)
  • Paper (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

Dispositif de transfert et de stabilisation d'une bande continue de matière fibreuse, en particulier de papier, de carton ou de cellulose. Ladite bande de matière fibreuse se trouve sur son parcours d'abord dans une première zone sandwich entre un habillage donneur de bande et un habillage receveur de bande, puis repose dans un tronçon de transfert uniquement sur l'habillage receveur de bande, et se trouve ensuite dans une seconde zone sandwich entre l'habillage receveur de bande et un autre habillage, un élément aspirant vertical étant prévu sur la face opposée à la bande de l'habillage receveur de bande et comportant au moins une zone d'aspiration dans la première zone sandwich et au moins une zone d'aspiration dans la zone du tronçon de transfert. En outre, un élément stabilisateur à surface convexe est situé sur la face opposée à la bande de l'habillage receveur de bande, après l'élément aspirant, si bien qu'il en résulte, avec l'élément aspirant, un tracé au moins partiellement ou complètement incurvé depuis l'extrémité de la première zone sandwich au moins jusqu'à un point A qui se trouve entre 20 et 150 mm, de préférence entre 20 et 100 mm, avant le début de la seconde zone sandwich.
PCT/EP2012/062879 2011-09-06 2012-07-03 Dispositif de transfert et de stabilisation d'une bande de matière fibreuse WO2013034330A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201280043299.8A CN103764907B (zh) 2011-09-06 2012-07-03 用于传送和稳定纤维幅的设备
EP12733462.1A EP2753752B1 (fr) 2011-09-06 2012-07-03 Machine de fabrication d'une bande de matière fibreuse comprenant un dispositif de transfert et de stabilisation de la bande de matière fibreuse

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011082159.7 2011-09-06
DE201110082159 DE102011082159A1 (de) 2011-09-06 2011-09-06 Vorrichtung zur Übergabe und Stabilisierung einer Faserstoffbahn

Publications (1)

Publication Number Publication Date
WO2013034330A1 true WO2013034330A1 (fr) 2013-03-14

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ID=46489203

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/062879 WO2013034330A1 (fr) 2011-09-06 2012-07-03 Dispositif de transfert et de stabilisation d'une bande de matière fibreuse

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Country Link
EP (1) EP2753752B1 (fr)
CN (1) CN103764907B (fr)
DE (1) DE102011082159A1 (fr)
WO (1) WO2013034330A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT15442U1 (de) 2015-03-26 2017-09-15 Voith Patent Gmbh Pressenvorrichtung
DE102016218199A1 (de) 2016-09-22 2018-03-22 Voith Patent Gmbh Schmiereinrichtung zum Schmieren eines Bandes
WO2018206216A1 (fr) * 2017-05-10 2018-11-15 Voith Patent Gmbh Dispositif et procédé de fabrication d'une bande de matière fibreuse
KR101912591B1 (ko) * 2018-06-18 2018-10-31 주식회사 삼우디티피 염색가공용 도포장치

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009065433A1 (fr) 2007-11-19 2009-05-28 Metso Paper, Inc. Procédé et dispositif pour transférer une bande de papier d'un tissu de soutien sur un autre
WO2009118449A1 (fr) 2008-03-28 2009-10-01 Metso Paper, Inc. Concept de machine pour bande de fibres, machine pour bande de fibres et procédé de production d’une bande de fibres

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009065433A1 (fr) 2007-11-19 2009-05-28 Metso Paper, Inc. Procédé et dispositif pour transférer une bande de papier d'un tissu de soutien sur un autre
WO2009118449A1 (fr) 2008-03-28 2009-10-01 Metso Paper, Inc. Concept de machine pour bande de fibres, machine pour bande de fibres et procédé de production d’une bande de fibres

Also Published As

Publication number Publication date
CN103764907B (zh) 2015-09-16
EP2753752A1 (fr) 2014-07-16
CN103764907A (zh) 2014-04-30
DE102011082159A1 (de) 2013-03-07
EP2753752B1 (fr) 2016-11-16

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