EP1057927B1 - Siebzylinder, insbesondere für Papierfaserstoff - Google Patents

Siebzylinder, insbesondere für Papierfaserstoff Download PDF

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Publication number
EP1057927B1
EP1057927B1 EP00401562A EP00401562A EP1057927B1 EP 1057927 B1 EP1057927 B1 EP 1057927B1 EP 00401562 A EP00401562 A EP 00401562A EP 00401562 A EP00401562 A EP 00401562A EP 1057927 B1 EP1057927 B1 EP 1057927B1
Authority
EP
European Patent Office
Prior art keywords
bars
flanges
filter element
sieve
filter
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
EP00401562A
Other languages
English (en)
French (fr)
Other versions
EP1057927A1 (de
Inventor
Alain Serres
Alain Fernandez De Grado
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.)
Kadant Lamort SAS
Original Assignee
Kadant Lamort SAS
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 Kadant Lamort SAS filed Critical Kadant Lamort SAS
Publication of EP1057927A1 publication Critical patent/EP1057927A1/de
Application granted granted Critical
Publication of EP1057927B1 publication Critical patent/EP1057927B1/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
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/16—Cylinders and plates for screens

Definitions

  • the present invention relates to a cylindrical screen intended more particularly for pulp processing.
  • Document DE 196 51 643 describes a filtering screen composed of bars arranged in a cage made up of two flanges connected to each other by bars forming tie rods.
  • the wires are clamped between the flanges and connected to the bars by support rings which at their outer edge are welded to the bars and which at their inner rim are provided with recesses receiving the bars by complementarity of form.
  • the bars can thus be placed in the support crowns and extracted from them by removing one of the flanges to have access.
  • this screen has a fixed support structure whose crowns are welded to the bars respecting the exact alignment of the recesses from one crown to the next. The establishment of this structure support is thus relatively complicated and therefore expensive.
  • the object of the invention is to propose a screen which is simpler to manufacture and therefore less more expensive than those of the prior art.
  • the sieve according to the invention must particular to avoid the welds between the bars and the crowns of support according to DE 196 51 643, while avoiding the machining of the flanges and the crown of intermediate support according to EP 0 893 536.
  • the present invention further allows the manufacture of sieves with elements filters made up of wires of appropriate section which are assembled next to the others on load-bearing elements instead of the U-shaped hoops of patent EP 0 707 109.
  • the sieve according to the present invention is of the type consisting of one or more filter elements arranged between two flanges by means of a plurality of bars, in which the filter element may consist of an assembly on supports regularly spaced with parallel wires, arranged next to each other in leaving little space between them.
  • such a filter element is rigid in the axial direction and is arranged upstream said bars relative to the direction of flow of the dough and pressing against them, by the supports of the wires so as to be kept in shape by said bars to against the pressure exerted by the dough.
  • the object of the invention is a cylindrical sieve, in particular for paper pulp, type comprising two flanges connected to each other by means of a plurality of bars, and at least one thin filter element rigid in the axial direction and constituted by wires arranged side by side, said filter element being carried by circles and disposed upstream of said bars relative to the direction of flow of the dough, characterized in that the filter element bears against the bars by through the circles which are in contact with them, without being attached to them.
  • the bars are fixed to the flanges while being in press against them so that the distance between the two flanges is invariable, this which possibly requires the installation of shims to compensate dimension errors of the filter elements.
  • the bars are fixed in support of a single bridle and cross each other; so that the filter elements can be tightened by this second flange.
  • the screen is constituted by the assembly, fixed dimensions, of two circular flanges 1 and 2 by means of a plurality of bars 3.
  • each bar 3 The ends 4 and 5 of each bar 3 are supported at the bottom of housings 6 and 7 formed in the flanges 1 and 2 and the bars are fixed to said flanges by screws 8 and 9.
  • This cage receives the filter element 10 which in the centripetal embodiment illustrated on Figures 1 and 2 is arranged on the periphery of the cage, and which in the mode of centrifugal embodiment illustrated in Figures 3 and 4 is arranged inside the cage.
  • the filter element consists of wires arranged side by side and parallel to the generator of the cylinder.
  • the wires are carried by supports which are constituted by circles 11, perpendicular to the wires 10, regularly spaced.
  • the wires are fixed to the circles 11 by welding to define filtration holes between the wires.
  • the screen must operate in centripetal regime, that is to say the flow of the dough being made from the outside towards the inside, the bars 3 are, as already mentioned, inside the filter element so as to support it.
  • the filter element is upstream of the bars 3 relative to the direction of the flow of the dough.
  • the length of the filter element 10 does not correspond exactly at the distance separating the two flanges 1 and 2, which is invariable on plans to be able to put shims such as 12 between one end of the cylinder and either flange 1 or 2.
  • FIG. 2 represents an alternative embodiment of the centripetal sieve of FIG. 1, the same elements with the same references.
  • the sieve here has three filter elements 10A, 10B and 10C which are placed one after the others with the interposition of reinforcing circles 20, which support the bars 3 to prevent bending.
  • Each reinforcing circle 20 has a number of through holes 20A to receive the bars 3 and the number of holes thus corresponds to the number of bars.
  • Each reinforcing circle 20 is thus a separate element which is placed directly on a filter element and threaded onto the bars 3 before the next filter element is not in place.
  • the reinforcement circle has the sole function of connect the bars to each other to stiffen them together.
  • one of the ends 15 of the bars 3 crosses the flange 2 by holes 17. These ends of the bars 3 are threaded, so that it it is possible to tighten the flange 2 and therefore to keep the filter element 10 in place by tightening between the flanges.
  • FIGS. 3 to 5 represent the application of the invention to centrifugal screens, i.e. in which the flow of the dough goes from inside the sieve to outside.
  • the filter element consists of an assembly of wires 10 on supports 11; but the invention is not limited to this particular mode of the filter element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Artificial Filaments (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Claims (6)

  1. Zylindrisches Sieb, insbesondere für Papierbrei, der Art mit zwei Flanschen (1, 2), die über eine Mehrzahl von Stäben (3) miteinander verbunden sind, und mit mindestens einem dünnen Filterelement (10), das in Axialrichtung steif ausgebildet ist, wobei das Filterelement von Stützringen (11) getragen und, relativ zur Strömungsrichtung des Breis, stromaufwärts der Stäbe (3) angeordnet ist, dadurch gekennzeichnet, daß das Filterelement gegen die Stäbe (3) über die Stützringe (11) anliegt, die mit diesen in Kontakt stehen, ohne an ihnen befestigt zu sein.
  2. Sieb nach Anspruch 1, wobei das Sieb zudem mindestens einen Verstärkungsring (20) umfaßt, der zwischen zwei aufeinanderfolgenden Filterelementen (10A, 10B, 10C) angeordnet und mit Durchgangslöchern (20A) zur Aufnahme der Stäbe (3) derart versehen ist, daß er sie so aneinander befestigt, daß deren Durchbiegen verhindert wird.
  3. Sieb nach Anspruch 1 oder 2, bei dem die Stäbe (3) an den beiden Flanschen (1, 2) befestigt sind, indem sie gegen diese anliegen, wobei sie in Ausnehmungen (6, 7) so eingreifen, daß der die beiden Flansche trennende Abstand unveränderlich ist.
  4. Sieb nach Anspruch 3, bei dem Unterlegkeile (12) zwischen dem Filterelement und dem einen oder dem anderen der Flansche (1, 2) angeordnet sind.
  5. Sieb nach einem der vorhergehenden Ansprüche, bei dem die Stützringe (11) an ihrem Innenrand oder an ihrem Außenrand mit dem Filterelement (10) verschweißt sind, während sie an ihrem anderen Rand in Kontakt mit den Stäben (3) stehen.
  6. Sieb nach einem der vorhergehenden Ansprüche, bei dem der Abstand zwischen zwei aufeinanderfolgenden Stützringen (11) in der Größenordnung von 25 mm liegt.
EP00401562A 1999-06-04 2000-06-02 Siebzylinder, insbesondere für Papierfaserstoff Expired - Lifetime EP1057927B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9907070A FR2794478B1 (fr) 1999-06-04 1999-06-04 Tamis cylindrique, notamment pour la pate a papier
FR9907070 1999-06-04

Publications (2)

Publication Number Publication Date
EP1057927A1 EP1057927A1 (de) 2000-12-06
EP1057927B1 true EP1057927B1 (de) 2003-05-07

Family

ID=9546382

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00401562A Expired - Lifetime EP1057927B1 (de) 1999-06-04 2000-06-02 Siebzylinder, insbesondere für Papierfaserstoff

Country Status (9)

Country Link
US (2) US6338412B1 (de)
EP (1) EP1057927B1 (de)
JP (1) JP2001003289A (de)
AT (1) ATE239821T1 (de)
CA (1) CA2311154C (de)
DE (1) DE60002521T2 (de)
ES (1) ES2198260T3 (de)
FR (1) FR2794478B1 (de)
NO (1) NO316616B1 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE519079C2 (sv) * 2001-05-30 2003-01-07 Metso Paper Inc Sil för silning av massasuspensioner innefattande en stödring med konisk yta
CN100337758C (zh) * 2002-12-27 2007-09-19 知嘎萨工业株式会社 圆筒形筛
ITVI20040139A1 (it) * 2004-06-10 2004-09-10 Comer Spa Metodo per la fabbricazione di cestelli filtranti di fibre in sospensione acquosa e cestello filtrante fabbricato mediante detto metodo
US7306176B1 (en) 2004-06-21 2007-12-11 Prince Industries, Inc. Compression assembly
CA2609881C (en) 2005-05-09 2012-05-29 Marc-Andre Hetu Screen basket with replaceable profiled bars
ITVI20070209A1 (it) * 2007-07-31 2009-02-01 Comer Spa Cestello filtrante perfezionato per fibre in sospensione acquosa
US7878230B2 (en) * 2007-10-24 2011-02-01 Overhead Door Corporation Door release mechanism
WO2009062287A1 (en) 2007-11-14 2009-05-22 Filtration Fibrewall Inc. Screen basket
US8397787B1 (en) 2009-04-20 2013-03-19 Overhead Door Corporation Door release mechanism
US8534468B2 (en) 2011-01-13 2013-09-17 Georgia-Pacific Consumer Products Lp Screen basket optimized for removal of stickies from adhesives-contaminated recyclable fiber
US8887791B2 (en) 2011-07-29 2014-11-18 Overhead Door Corporation Reset mechanism for stored energy emergency barriers
US11851948B2 (en) 2019-10-30 2023-12-26 Overhead Door Corporation Door lowering mechanism and method
US20230292808A1 (en) * 2022-03-21 2023-09-21 John C. Digertt, Inc. Easily repairable main wash basket for washing cannabis

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU578924B2 (en) 1984-12-12 1988-11-10 Sankin Kogyo Kabushiki Kaisha Tooth restoration composition having x-ray contrastability
US5118421A (en) * 1989-08-24 1992-06-02 Albany International Corp. Cylndrical filter media with support structure
FR2725737B1 (fr) * 1994-10-14 1997-01-31 Lamort E & M Perfectionnements aux tamis d'epuration, notamment pour la pate a papier
JP3190234B2 (ja) * 1995-09-21 2001-07-23 相川鉄工株式会社 製紙用スクリーン
US5791495A (en) * 1996-03-11 1998-08-11 Beloit Technologies, Inc. Paper pulp screen cylinder
JP3190254B2 (ja) * 1996-06-20 2001-07-23 相川鉄工株式会社 製紙用スクリ−ン
DE19651643A1 (de) * 1996-12-12 1998-06-18 Voith Sulzer Stoffaufbereitung Siebvorrichtung mit spaltförmigen Öffnungen
US5954956A (en) * 1997-07-22 1999-09-21 J&L Fiber Services Modular screen cylinder and a method for its manufacture
DE19842042A1 (de) * 1998-09-14 2000-03-23 Fiedler Heinrich Gmbh Siebvorrichtung

Also Published As

Publication number Publication date
NO20002795D0 (no) 2000-05-31
DE60002521T2 (de) 2004-03-18
JP2001003289A (ja) 2001-01-09
EP1057927A1 (de) 2000-12-06
FR2794478B1 (fr) 2001-08-03
US6338412B1 (en) 2002-01-15
DE60002521D1 (de) 2003-06-12
FR2794478A1 (fr) 2000-12-08
ES2198260T3 (es) 2004-02-01
ATE239821T1 (de) 2003-05-15
NO20002795L (no) 2000-12-05
CA2311154A1 (fr) 2000-12-04
CA2311154C (fr) 2007-12-18
USRE38738E1 (en) 2005-05-31
NO316616B1 (no) 2004-03-08

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