EP1057927A1 - Tamis cylindrique, notamment pour la pate à papier - Google Patents
Tamis cylindrique, notamment pour la pate à papier Download PDFInfo
- Publication number
- EP1057927A1 EP1057927A1 EP00401562A EP00401562A EP1057927A1 EP 1057927 A1 EP1057927 A1 EP 1057927A1 EP 00401562 A EP00401562 A EP 00401562A EP 00401562 A EP00401562 A EP 00401562A EP 1057927 A1 EP1057927 A1 EP 1057927A1
- 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.)
- Granted
Links
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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 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 provide 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.
- Figure 1 a half view, in longitudinal section, of a first embodiment a centripetal sieve according to the invention.
- Figure 2 a half view, in longitudinal section, of a second embodiment a centripetal sieve according to the invention.
- Figure 3 a view corresponding to Figure 1, in centrifugal version.
- Figure 4 a view corresponding to Figure 2, in centrifugal version.
- Figure 5 a perspective view with partial cutaway of the screen of Figure 3.
- 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 sieve must operate in centripetal regime, that is to say the flow of the dough being made from outside to inside, the bars 3 are, as already mentioned, inside the filter element to support it. In in other words, 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 certain 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 the inside of 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)
Abstract
Description
- le tamis comporte en outre au moins un cercle de renfort disposé entre deux éléments de filtrage successifs et pourvu de trous traversant pour recevoir les barreaux afin d'empêcher la flexion de ceux-ci ;
- les barreaux sont fixés aux deux brides en étant en appui contre elles, en butée dans des logements de sorte que la distance séparant les deux brides est invariable ;
- des cales d'épaisseur sont interposées entre l'élément filtrant et l'une ou l'autre des brides ;
- les barreaux sont fixés, en appui, à une seule bride et traversent l'autre de sorte que les éléments filtrants peuvent être serrés par ladite deuxième bride;
- les cercles de support sont à leur rebord intérieur ou extérieur soudés à l'élément filtrant, alors qu'à l'autre rebord, ils sont en contact avec les barreaux ;
- la distance optimale entre deux cercles successifs est de l'ordre de 25 mm.
Claims (6)
- Tamis cylindrique, notamment pour la pâte à papier, du type comportant deux brides (1, 2) reliées l'une à l'autre au moyen d'une pluralité de barreaux (3), et au moins un élément filtrant mince (10) rigide dans le sens axial, ledit élément filtrant étant porté par des cercles de support (11) et disposé en amont desdits barreaux (3) par rapport au sens d'écoulement de la pâte, caractérisé en ce que l'élément filtrant est en appui contre les barreaux (3) par l'intermédiaire des cercles de support (11) qui se trouvent en contact avec ceux-ci, sans y être fixés.
- Tamis selon la revendication 1, dans lequel le tamis comporte en outre au moins un cercle de renfort (20) disposé entre deux éléments de filtrage successifs (10A, 10B, 10C) et pourvu de trous traversant (20A) pour recevoir les barreaux (3) de manière à les fixer ensemble afin d'en empêcher la flexion.
- Tamis selon la revendication 1 ou 2, dans lequel les barreaux (3) sont fixés aux deux brides (1, 2) en étant en appui contre elles, en butée dans des logements (6, 7) de sorte que la distance séparant les deux brides est invariable.
- Tamis selon la revendication 3, dans lequel des cales d'épaisseur (12) sont interposées entre l'élément filtrant et l'une ou l'autre desdits brides (1, 2).
- Tamis selon l'une quelconque des revendications précédentes, dans lequel les cercles de support (11) sont à leur rebord intérieur ou extérieur soudés à l'élément filtrant (10), alors qu'à l'autre rebord, ils sont en contact avec les barreaux (3).
- Tamis selon l'une quelconque des revendications précédentes, dans lequel la distance entre deux cercles de support successifs (11) est de l'ordre de 25 mm.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9907070 | 1999-06-04 | ||
FR9907070A FR2794478B1 (fr) | 1999-06-04 | 1999-06-04 | Tamis cylindrique, notamment pour la pate a papier |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1057927A1 true EP1057927A1 (fr) | 2000-12-06 |
EP1057927B1 EP1057927B1 (fr) | 2003-05-07 |
Family
ID=9546382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00401562A Expired - Lifetime EP1057927B1 (fr) | 1999-06-04 | 2000-06-02 | Tamis cylindrique, notamment pour la pate à papier |
Country Status (9)
Country | Link |
---|---|
US (2) | US6338412B1 (fr) |
EP (1) | EP1057927B1 (fr) |
JP (1) | JP2001003289A (fr) |
AT (1) | ATE239821T1 (fr) |
CA (1) | CA2311154C (fr) |
DE (1) | DE60002521T2 (fr) |
ES (1) | ES2198260T3 (fr) |
FR (1) | FR2794478B1 (fr) |
NO (1) | NO316616B1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1582271A1 (fr) * | 2002-12-27 | 2005-10-05 | Tsukasa industry Co. Limited | Tamis cylindrique circulaire |
Families Citing this family (12)
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 |
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 |
CN101171390B (zh) | 2005-05-09 | 2011-04-13 | 纺织过滤材料股份有限公司 | 筛网筐及装配筛网筐的方法 |
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 (fr) | 2007-11-14 | 2009-05-22 | Filtration Fibrewall Inc. | Panier épurateur |
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 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19651643A1 (de) * | 1996-12-12 | 1998-06-18 | Voith Sulzer Stoffaufbereitung | Siebvorrichtung mit spaltförmigen Öffnungen |
EP0893536A2 (fr) * | 1997-07-22 | 1999-01-27 | J&L Fiber Services, Inc. | Cylindre de tamissage et son procédé de fabrication |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2181144B (en) | 1984-12-12 | 1989-06-07 | Sankin Ind Co | Dental material 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 |
DE19842042A1 (de) * | 1998-09-14 | 2000-03-23 | Fiedler Heinrich Gmbh | Siebvorrichtung |
-
1999
- 1999-06-04 FR FR9907070A patent/FR2794478B1/fr not_active Expired - Fee Related
-
2000
- 2000-05-31 NO NO20002795A patent/NO316616B1/no not_active IP Right Cessation
- 2000-06-01 CA CA002311154A patent/CA2311154C/fr not_active Expired - Fee Related
- 2000-06-02 EP EP00401562A patent/EP1057927B1/fr not_active Expired - Lifetime
- 2000-06-02 AT AT00401562T patent/ATE239821T1/de active
- 2000-06-02 DE DE60002521T patent/DE60002521T2/de not_active Expired - Lifetime
- 2000-06-02 JP JP2000165835A patent/JP2001003289A/ja active Pending
- 2000-06-02 ES ES00401562T patent/ES2198260T3/es not_active Expired - Lifetime
- 2000-06-05 US US09/587,329 patent/US6338412B1/en not_active Ceased
-
2002
- 2002-05-08 US US10/140,205 patent/USRE38738E1/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19651643A1 (de) * | 1996-12-12 | 1998-06-18 | Voith Sulzer Stoffaufbereitung | Siebvorrichtung mit spaltförmigen Öffnungen |
EP0893536A2 (fr) * | 1997-07-22 | 1999-01-27 | J&L Fiber Services, Inc. | Cylindre de tamissage et son procédé de fabrication |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1582271A1 (fr) * | 2002-12-27 | 2005-10-05 | Tsukasa industry Co. Limited | Tamis cylindrique circulaire |
EP1582271A4 (fr) * | 2002-12-27 | 2010-05-26 | Tsukasa Kasei Kogyo | Tamis cylindrique circulaire |
Also Published As
Publication number | Publication date |
---|---|
DE60002521T2 (de) | 2004-03-18 |
EP1057927B1 (fr) | 2003-05-07 |
FR2794478B1 (fr) | 2001-08-03 |
USRE38738E1 (en) | 2005-05-31 |
JP2001003289A (ja) | 2001-01-09 |
NO20002795L (no) | 2000-12-05 |
NO20002795D0 (no) | 2000-05-31 |
DE60002521D1 (de) | 2003-06-12 |
NO316616B1 (no) | 2004-03-08 |
FR2794478A1 (fr) | 2000-12-08 |
CA2311154C (fr) | 2007-12-18 |
ATE239821T1 (de) | 2003-05-15 |
US6338412B1 (en) | 2002-01-15 |
ES2198260T3 (es) | 2004-02-01 |
CA2311154A1 (fr) | 2000-12-04 |
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