EP0135544A1 - Dispositif d'elimination de l'eau pour la partie humide d'une machine a papier. - Google Patents

Dispositif d'elimination de l'eau pour la partie humide d'une machine a papier.

Info

Publication number
EP0135544A1
EP0135544A1 EP84900849A EP84900849A EP0135544A1 EP 0135544 A1 EP0135544 A1 EP 0135544A1 EP 84900849 A EP84900849 A EP 84900849A EP 84900849 A EP84900849 A EP 84900849A EP 0135544 A1 EP0135544 A1 EP 0135544A1
Authority
EP
European Patent Office
Prior art keywords
segments
felt
sieve
machine
individual
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.)
Granted
Application number
EP84900849A
Other languages
German (de)
English (en)
Other versions
EP0135544B1 (fr
Inventor
Karl-Dieter Fuchs
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.)
Feldmuehle AG
Original Assignee
Feldmuehle 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.)
Filing date
Publication date
Application filed by Feldmuehle AG filed Critical Feldmuehle AG
Priority to AT84900849T priority Critical patent/ATE26730T1/de
Publication of EP0135544A1 publication Critical patent/EP0135544A1/fr
Application granted granted Critical
Publication of EP0135544B1 publication Critical patent/EP0135544B1/fr
Expired legal-status Critical Current

Links

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
    • D21F1/48—Suction apparatus
    • D21F1/52—Suction boxes without rolls
    • D21F1/523—Covers thereof
    • 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
    • D21F1/483—Drainage foils and bars

Definitions

  • the invention relates to a strip-shaped dewatering element for the screen or felt part of a fabric dewatering machine, in particular paper machine, such as a screen table, foil, support table, wet vacuum cleaner, vacuum cleaner, pipe vacuum cleaner, felt vacuum cleaner, the coating of which is in sliding contact with the screen or made of hard materials such as sintered aluminum oxide, silicon carbide and the like.
  • paper machine such as a screen table, foil, support table, wet vacuum cleaner, vacuum cleaner, pipe vacuum cleaner, felt vacuum cleaner, the coating of which is in sliding contact with the screen or made of hard materials such as sintered aluminum oxide, silicon carbide and the like.
  • Strip-shaped dewatering elements for the sieve or felt part of a fabric dewatering machine which are made up of individual segments of hard materials in combination with other materials, are known.
  • the introduction of the dewatering elements equipped with hard materials has enabled the advantageous high working speeds of the dewatering machine in use today.
  • the construction of the drainage elements from individual segments is necessary because bodies made of hard materials cannot be produced in one piece in any size, as is the case, for example, with plastics.
  • a decisive disadvantage of the construction of segments is that joints between the individual segments can damage the screen and felt and cause errors such as water streaks in the paper to be produced - especially if there are manufacturing-related tolerances between the individual segments.
  • This disadvantage can be eliminated by grinding over a completely constructed drainage element at the manufacturer. Nevertheless, there may be gaping at the connection joints if the drainage elements are stressed by bending, torsion and / or thermal expansion.
  • DE-PS 23 62 732 proposes a drainage device in which the most wear-resistant hard material segments, which have an attachment on their underside or trapezoidal grooves running in the longitudinal direction, by means of a casting compound in a U-shaped metal strip are fastened.
  • Metal bar and hard material segment together form a built-in element for the dewatering device that extends over the entire width of the paper machine.
  • the contact surfaces of the segments on the U-shaped metal rail must additionally be machined by a complex grinding process. Drainage elements of this composite construction can be caused by bending or
  • DE-PS 21 10 564 proposes a drainage device in which the hard material segments, which are embedded in a support strip, are braced against one another by a tendon.
  • the tendon consists of a rod and two clamping jaws movable at the ends of the rod.
  • a disadvantage of this construction is that when the drainage element bends, compressive stresses can occur at the joints of the individual hard material elements, which lead to flaking of the hard material.
  • paragraphs at the abutting points of the individual hard material segments can be created by slight twisting against one another, which cause the above-mentioned damage to the sieve and felt.
  • the production of the individual hard material segments requires compliance with very small tolerances and the greatest possible angular fidelity when machining the abutting surfaces, so that a considerable and costly effort is required for grinding work.
  • ___OMPI In DE-OS 23 36 450 a composite ceramic component is proposed as a drainage element which is under a sufficient compressive preload so that when the element is bent by bending forces or thermal * the resulting pressure load on the inside the curve is absorbed.
  • a disadvantage of this construction is that again, complex and precise processing of the individual ceramic elements is required, and constant, sufficient pressure preloading by the tie rod is not achieved due to the different thermal expansion coefficients ceramic-steel can.
  • the temperature interval in the paper machine is between 20 and 85 ° C. There is thus the risk that, despite prestressing in the event of bending stress, the joints will diverge or stress peaks occurring at the edges in the pressure areas of the joints of the individual ceramic components will lead to flaking.
  • both the proposal of DE-PS 21 10 564 and that of DE-OS 23 36 450 require a hole in the ceramic segment and thus weaken this segment to reduce strength.
  • the individual ceramic segments (1) have no shoulders, steps or gaps, in
  • a strip-shaped drainage element for the sieve or felt part of a fabric dewatering machine in particular paper machine, such as sieve table, foil, support table, wet vacuum cleaner, vacuum cleaner, pipe vacuum cleaner, felt vacuum cleaner, is formed, the sliding one of which Contact with the sieve or felt covering consists of individual segments made of hard materials, such as sintered aluminum & xid, silicon carbide or the like, in particular of segments which have an attachment on the side facing away from the sieve side and the individual segments on one transversely to the machine direction extending profile bar are attached, which in turn on the supporting structure of the Ent.
  • Watering machine can be applied and the individual segments being connected to one another by gluing, characterized in that the individual segments at their longitudinal ends extend in a stepped manner over the entire width of the segments. Have connection surfaces.
  • the advantage of the invention is that by joining together by means of gluing the individual segments having the stepped "connecting surfaces, a structure is created that can be regarded as a self-supporting drainage element in terms of strength and can be handled safely as such can. Since the upper part 2 and extension 3 are made of the same thermal expansion coefficients, they occur. Composite construction in the event of temperature changes no forces due to thermal expansions, which lead to a change in shape or deformation particularly on the stepped connecting surfaces and thus to the failure of the component.
  • the stepped connecting surfaces of the individual segments enable a force-fit and form-fitting adhesive connection, a substantial increase in the surfaces to be connected being achieved compared to adhesive bonding with a blunt joint, and thus a reduction in the specific surface load takes place.
  • the critical shear strength of the adhesive bond is greater than the critical static strength of the selected hard materials made of ceramic material, it is achieved that there are no plastic or elastic deformations and the associated change in shape of the strip-shaped drainage element at the stepped connecting surfaces.
  • Commonly known agents such as adhesives, solders, putties or low-melting mixtures of inorganic glass-forming water-insoluble compounds can be used to carry out the adhesive bond, provided that they only achieve the required high strength.
  • connection surfaces are perpendicular to the longitudinal axis of the segment and each form a right angle with one another.
  • a particularly preferred embodiment of the invention consists in that the segment made of hard materials is not formed in one part and machined by grinding, but is formed from a separately produced upper part 2 and a shoulder 3 of the same length, the upper part 2 against approach 3 is shifted by half the length and is connected to the approach by adhesive.
  • Upper part 2 and neck 3 can consist of the same material with the same specific material characteristics.
  • the approach 3 does not have such great requirements with regard to particle size distribution, surface hardness, pore volume, pore distribution, grinding and polishability as for the upper part 2, it is advantageous to use starting materials which only meet the requirements for strength and thermal expansion coefficients are sufficient, while the upper part in contact with the sieve or felt should have as few pores as possible, so that no filler particles can deposit therein, which in turn lead to damage to the sieve and felt, are pores at approach 3 even favorable for better adhesion of the adhesive.
  • the batch 3 can be produced, for example, from the waste produced during the processing of the green shaped bodies.
  • connection surface parallel to the longitudinal axis of the segment should be identical to the neutral axis of the total cross section or can be above the neutral axis. If the connection surface lies in the neutral axis, then no tensile, compressive or other stresses occur. If the connecting surface lies above the neutral axis, the adhesive layer is only loaded by compressive stresses. In this way, a high level of security of the connection is guaranteed. If the adhesive were used on peeling, the safety of the would be. Connection only a fraction of that under shear or shear stress.
  • Figure 1 shows a segment of hard material in perspective.
  • Figure 2 shows a hard material segments of the
  • Figure 1 composite drainage element transverse to the machine direction.
  • Figure 3 shows a drainage element of a second embodiment in a side view transverse to the machine direction.
  • Figure 4 shows a sectional view of Figure 3 in the plane of the line VV.
  • Figure 5 shows a drainage element of a third "embodiment in perspective.
  • FIG. 6 shows the sectional view of a drainage element with profile strip and supporting structure of the fabric drainage machine.
  • Hard material segment 1 has a shoulder 3, which is provided for receiving in a profile strip 9, which is shown in FIG. 6.
  • the projection 3 is arranged offset in the longitudinal direction with respect to the upper part 2 of the hard material segment 1 and has a suitable cross section in the shape of a trapezoid or T. With the aid of this cross-sectional shape, a secure connection is provided by means of profile strip 9 to the support structure 10 shown in FIG.
  • the upper part 2 of the hard material segment 1 is in a more direct manner. Connection with the sieve or felt, the running direction of the sieve or felt is indicated by the arrow 6.
  • the cross section of the upper part 2 is shown here as a rectangle, but it can also take any other preferred form.
  • the stepped connection surfaces are used, which consist of the surfaces 4 which extend parallel to the longitudinal axis of the segment and which each extend perpendicular to the longitudinal axis of the segment Surfaces 5 are formed.
  • FIG. 2 shows a dewatering element composed of the individual segments 1 transverse to the direction of the running sieve or felt.
  • the stepped connecting surfaces formed from the individual ones Surfaces 4 and 5 are closely adjacent and are held together non-positively by the adhesive layer 8.
  • Figure 3 shows a drainage element in a further embodiment.
  • the two-part segment 1 consists of the upper part 2 and the neck 3, which can be individually manufactured and are easy to machine.
  • Upper part 2 and shoulder 3 have the same length and are each shifted by half the length on their horizontal extending parallel to the longitudinal axis.
  • Connection surfaces are non-positively connected by means of the adhesive layer 8.
  • the stepped connecting surface between the individual segments 1 is in turn formed by the surfaces 4 and 5.
  • FIG. 4 shows a dewatering element in the sectional view in the plane of the line IV-IV drawn in FIG. 3.
  • Upper part 2 is designed in the form of a foil.
  • the connection to the neck 3 is made by the adhesive layer 8.
  • the approach 3 has a T-shaped cross section.
  • the drainage element is connected to the supporting structure by means of a profile strip 9 shown in FIG.
  • Figure 5 shows a drainage element of a third embodiment in a perspective view.
  • the structure is again made up of two-part individual segments 1.
  • the direction of wire travel is indicated by arrow 6.
  • the upper part 2 is in the form of a Foils formed and wider than approach 3.
  • Connection with the profile bar, not shown here, has a dovetail cross-section.
  • the thickness of the extension 3 in vertical extension is greater than the thickness of the top 2.
  • the top 2 has the same overall length as the extension 3 and is offset by half the length on the extension 3 by means of the adhesive layer 8. '
  • FIG. 6 shows the vertical section through a dewatering element in its construction on the supporting structure of a fabric dewatering machine.
  • the contact surface 11 of the upper part 2 touches the screen or the felt, the running direction of which is indicated by the arrow 6.
  • the profile bar 9 in turn encompasses a T-shaped metal profile 12 of the construction 10 of the fabric dewatering machine.
  • the dewatering segment with its extension 3 can only move freely in the recess of the profile bar 9 transversely to the direction of wire travel.
  • the profile bar 9 on the T-shaped metal profile 12 with the support structure 10 can only move freely transversely to the direction of wire travel 6. This arrangement compensates for thermal expansion in the assembled structure by means of slip. '' so that no bending stresses occur on the drainage element.

Landscapes

  • Paper (AREA)
  • Drying Of Gases (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)

Abstract

Le dispositif pour l'élimination de l'eau en forme de barre pour la partie humide d'une machine, en particulier une machine à papier pour l'élimination de l'eau d'une substance, telle qu'une table de filtrage, foil, table de support, aspirateur humide, aspirateur, aspirateur à tuyau, aspirateur à feutre, est agencé de manière telle que les revêtements formés de matières dures telles que l'oxyde d'aluminium fritté, le carbure de silicium ou autre matière semblable, se trouvant en contact glissant avec le filtre ou le feutre, sont constitués de segments individuels qui présentent eux-mêmes des dispositifs (3) pour recevoir des barres profilées s'étendant transversalement au sens de la marche de la machine. Les segments présentent à leurs extrémités longitudinales des surfaces de liaison (4, 5) étagées s'étendant sur toute la largeur des segments et sont collés entre eux à ces surfaces de liaison.
EP84900849A 1983-02-24 1984-02-22 Dispositif d'elimination de l'eau pour la partie humide d'une machine a papier Expired EP0135544B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84900849T ATE26730T1 (de) 1983-02-24 1984-02-22 Entwaesserungselement fuer den nassteil einer papiermaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3306457A DE3306457C2 (de) 1983-02-24 1983-02-24 Entwässerungselement für den Naßteil einer Papiermaschine
DE3306457 1983-02-24

Publications (2)

Publication Number Publication Date
EP0135544A1 true EP0135544A1 (fr) 1985-04-03
EP0135544B1 EP0135544B1 (fr) 1987-04-22

Family

ID=6191719

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84900849A Expired EP0135544B1 (fr) 1983-02-24 1984-02-22 Dispositif d'elimination de l'eau pour la partie humide d'une machine a papier

Country Status (9)

Country Link
EP (1) EP0135544B1 (fr)
JP (1) JPS60500819A (fr)
BR (1) BR8405488A (fr)
CA (1) CA1235010A (fr)
DE (2) DE3306457C2 (fr)
FI (1) FI80093C (fr)
IT (1) IT1180437B (fr)
SU (1) SU1431685A3 (fr)
WO (1) WO1984003314A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3823882A1 (de) * 1988-07-14 1990-01-18 Feldmuehle Ag Schlitzsauger
DE29504419U1 (de) * 1995-03-15 1995-05-11 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Leisteneinheit zur nachgiebigen Unterstützung eines Siebbandes einer Papiermaschine
US5630910A (en) * 1995-06-26 1997-05-20 Jwi Ltd. Clip fastener for a dewatering box
GB9518713D0 (en) * 1995-09-13 1995-11-15 Int Syalons Newcastle Ltd Wear-resistant blade element
DE10130323A1 (de) * 2001-06-22 2003-01-02 Voith Paper Patent Gmbh Verschleisskörper in Schichtverbundbauweise, insbesondere in einer Papier- oder Kartonmaschine, Verfahren zu seiner Herstellung und seine Verwendung
ES2329843T3 (es) 2006-10-16 2009-12-01 Klaus Bartelmuss Liston de criba para instalaciones de generacion de papel.
US7918969B2 (en) * 2007-03-23 2011-04-05 Astenjohnson, Inc. Composite construction for dewatering blades for a papermaking machine
EP2150651B1 (fr) * 2007-05-23 2015-03-18 AstenJohnson, Inc. Lame d'épaississement pour machine à papier incorporant un mécanisme de fixation
AT524317B1 (de) * 2021-06-08 2022-05-15 Bartelmuss Ing Klaus Abstreifleiste und Bausatz zur Verwendung in einer Anlage zur Erzeugung einer Papierbahn

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE349341B (fr) * 1967-04-17 1972-09-25 Leder & Riemen Patent
AT357857B (de) * 1974-07-29 1980-08-11 Bartelmuss Heinrich Ing Verfahren und vorrichtung zur herstellung eines aus einzelnen oxidkeramikelementen bestehenden belages
US4047993A (en) * 1975-11-13 1977-09-13 Heinrich Bartelmuss Method of making an abrasion-resistant plate
FI791520A7 (fi) * 1978-05-12 1979-11-13 Rudolf Poeschl Med sikten eller filten i en massaavvattningsanordning samverkande byggdel och foerfarande foer dess framstaellning
US4238286A (en) * 1979-05-22 1980-12-09 Rudolf Poeschl Dewatering table bar for the wire cloth or felt in a pulp-dewatering machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8403314A1 *

Also Published As

Publication number Publication date
DE3306457C2 (de) 1986-05-07
EP0135544B1 (fr) 1987-04-22
SU1431685A3 (ru) 1988-10-15
IT8412445A0 (it) 1984-02-24
DE3306457A1 (de) 1984-08-30
WO1984003314A1 (fr) 1984-08-30
JPS60500819A (ja) 1985-05-30
FI80093C (fi) 1990-04-10
IT1180437B (it) 1987-09-23
FI843839A0 (fi) 1984-09-28
CA1235010A (fr) 1988-04-12
IT8412445A1 (it) 1985-08-24
DE3463281D1 (en) 1987-05-27
BR8405488A (pt) 1985-02-20
FI843839L (fi) 1984-09-28
FI80093B (fi) 1989-12-29

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