EP0287408B1 - Tamis pour épurateurs - Google Patents

Tamis pour épurateurs Download PDF

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Publication number
EP0287408B1
EP0287408B1 EP88400553A EP88400553A EP0287408B1 EP 0287408 B1 EP0287408 B1 EP 0287408B1 EP 88400553 A EP88400553 A EP 88400553A EP 88400553 A EP88400553 A EP 88400553A EP 0287408 B1 EP0287408 B1 EP 0287408B1
Authority
EP
European Patent Office
Prior art keywords
bars
small
crosspieces
notches
bar
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
EP88400553A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0287408A1 (fr
Inventor
Pierre Lamort
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.)
E ET M LAMORT
Original Assignee
E ET M LAMORT
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 E ET M LAMORT filed Critical E ET M LAMORT
Publication of EP0287408A1 publication Critical patent/EP0287408A1/fr
Application granted granted Critical
Publication of EP0287408B1 publication Critical patent/EP0287408B1/fr
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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/496—Multiperforated metal article making
    • Y10T29/49604—Filter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y10T29/4987—Elastic joining of parts

Definitions

  • the present invention relates to purifiers or separators, particularly to pulp purifiers of the type comprising one or more sieves with slits or holes.
  • Such sieves can be planar, comprising a multiplicity of elementary sieving surfaces, or cylindrical of circular or polygonal section, the bars being parallel to the axis of the cylinder and the crosspieces perpendicular to this axis.
  • the ends of the crosspieces in order to close the cylinder, have, over a length of several positioning notches, a thickness of the order of half the thickness in the central zone, so as to reconstitute the section of the cross member by superimposing said ends, which are assembled and held in position by tightening the sides of the first notches of the bars.
  • the present invention aims to remedy these drawbacks and relates to a cylindrical screen for purifier or separator and in particular for paper pulp purifier of the type produced by assembling parallel strips on a plurality of crosspieces, the assembly being carried out without welding on the sleepers by notches cut along the bars, notches whose lips penetrate into at least one V-shaped lateral groove carried by each of the sleepers, characterized in that the bars carry laterally on at least one side, at least one recess of so that the width of the bar is reduced by the depth hollowed out at the level of the recess, and in that the bars are mounted and fixed on cross-members in the shape of a circle at different places along their length by one of their longitudinal faces , then juxtaposed in contact with one another by their parts which are not hollowed out.
  • the sieve obtained has strictly identical slots and very precise width whatever the variations in the widths of the bars. Indeed, the recesses being produced by milling or other known means from the bearing surface formed by the edge of the bar, their depth is very precise, and the width of the slots being the addition of two opposite recesses is itself as precise.
  • the sieve 1 of FIG. 1 is produced by assembling bars 6 and crosspieces 7.
  • the bars are shown directed along the generatrices of a cylinder whose crosspieces are straight sections.
  • the bars 6 have, according to their thickness 2, notches 8 at the dovetail described in patent EP-A-0 182 688.
  • the sleepers 7 comprise at least one lateral groove 9 with a V section in which a lip of the notch penetrates. 8.
  • the longitudinal section of the notch 8 corresponds to the cross section of the cross member into which it enters.
  • the sieves are often produced by milling stainless steel sheets, 6 to 8 mm thick, in order to produce slits of a few tenths of a millimeter, spaced parallel to each other others by intervals of the order of half a centimeter.
  • bars 6 with a width 3 similar to the preceding intervals (about 1/2 cm) and with a similar thickness 2 (6 to 8 mm), assembled by crosspieces 7 of similar thickness.
  • each end (7a, 7b) of the crosspiece sees over a length covered by several bars, its reduced thickness, in the direction parallel to the bars, so that the total of the thicknesses 7a and 7b is equal to the thickness of the cross-member 7.
  • pins 4 are provided, parallel to the bars 6, preferably in the part of the crosspiece 7 which enters the notch of the bar so that when the bars are put in place, the pins are trapped by the bars and the blocking of the assembly is complete.
  • the bars 6 have a cross section in the general shape of a T ( Figures 3, 6, 7, 8), the notch 8 being formed in the vertical middle branch of the T.
  • the cross section of the bars is generally trapezoidal (FIG. 24), the notch 8 being formed in the short side 13.
  • the lateral edges 5 of the bars 6 are strictly parallel to each other over their entire length such that so that by juxtaposing two adjacent bars 6, the edges 5 are in contact with one another.
  • the bars have laterally on at least one side, at least one recess 10 so that the width 3 of the bar is reduced, at the level of the recess (s), by the hollowed-out depth.
  • the bars 6 thus hollowed out are assembled on the crosspieces 7 and juxtaposed against each other by their lateral edges 5 in abutment not hollowed out.
  • the recesses preferably made by milling, can be made over more or less long distances and they are placed along the lateral edges so that the juxtaposition of two bars gives at least one slot 12 or one hole 14, depending on the milling length.
  • the bars are T-shaped and the recesses 10, 11 are made on each side at the ends 6a, 6b of the two horizontal branches, symmetrically with respect to the longitudinal axis 15.
  • the screen thus formed by the juxtaposition of bars makes it possible to obtain a succession of slots 11 of the same width, whatever the interval between the slots. It is then possible to use bars with irregularities in width between them.
  • closing bar 16 When the cylinder is closed, due to the almost inevitable presence of these irregularities, provision is made to use a closing bar 16 whose characteristic is to be of width 3 different from that of the others, this width being that of the remaining gap between the last two bars 6.
  • This closing bar 16 can be more or less wide than the others, but it is hollowed out identically.
  • the invention is susceptible of variants providing certain improvements, already described in patent EP-A-0 182 688, in particular the bars can have an asymmetrical cross section, some can have a thickness greater than that of the others creating space in place an obstacle which slows down the flow along the screen, or else they may include a downstream heel causing eddies improving the functioning of the slots.
  • the invention also includes purifiers or other filtering, purifying or separating apparatus, in particular for the manufacture of paper pulp comprising a filter according to the above description.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Centrifugal Separators (AREA)
  • Filtration Of Liquid (AREA)
EP88400553A 1987-03-13 1988-03-09 Tamis pour épurateurs Expired - Lifetime EP0287408B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8703448 1987-03-13
FR8703448A FR2612081B1 (fr) 1987-03-13 1987-03-13 Perfectionnement aux tamis pour epurateur et a leur mode de fabrication

Publications (2)

Publication Number Publication Date
EP0287408A1 EP0287408A1 (fr) 1988-10-19
EP0287408B1 true EP0287408B1 (fr) 1991-04-24

Family

ID=9348930

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88400553A Expired - Lifetime EP0287408B1 (fr) 1987-03-13 1988-03-09 Tamis pour épurateurs

Country Status (7)

Country Link
US (1) US4828689A (fi)
EP (1) EP0287408B1 (fi)
JP (1) JP2598667B2 (fi)
DE (1) DE3862505D1 (fi)
ES (1) ES2022648B3 (fi)
FI (1) FI89283C (fi)
FR (1) FR2612081B1 (fi)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59004134D1 (de) * 1989-12-09 1994-02-17 Escher Wyss Gmbh Verfahren zur Herstellung eines Spaltsiebes.
DE3942591A1 (de) * 1989-12-22 1991-06-27 Voith Gmbh J M Siebkorb
US5165548A (en) * 1990-04-23 1992-11-24 Hemlock Semiconductor Corporation Rotary silicon screen
SE501110C2 (sv) * 1993-04-21 1994-11-14 Kvaerner Pulping Tech Silorgan med en silkropp och sätt och anordning för silkroppens tillverkning
US5527473A (en) * 1993-07-15 1996-06-18 Ackerman; Carl D. Process for performing reactions in a liquid-solid catalyst slurry
SE502437C2 (sv) * 1994-02-07 1995-10-16 Kvaerner Pulping Tech Siltrumma för avvattning och/eller tvättning av cellulosamassa
JP2968696B2 (ja) * 1994-12-28 1999-10-25 相川鉄工株式会社 製紙用のスクリーンプレートの製造方法及び製紙用のスクリーンプレート
US5823355A (en) * 1995-03-29 1998-10-20 Beloit Technologies, Inc. Fibresaver screen basket support
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
DE19635189C2 (de) * 1996-08-30 1999-01-28 Voith Sulzer Stoffaufbereitung Verfahren zur Herstellung von Sieben
FR2809029B1 (fr) * 2000-05-16 2002-06-21 Johnson Filtration Systems Procede de fabrication d'un panier mecanique de filtration
DE10052715A1 (de) * 2000-10-24 2002-05-02 Fiedler Heinrich Gmbh Spaltsiebanordnung
US6460757B1 (en) 2000-11-14 2002-10-08 Newscreen As Apparatus and method for forming slotted wire screens
US6915910B2 (en) * 2001-04-16 2005-07-12 J&L Fiber Services, Inc. Screen cylinder and method
DE10218323A1 (de) * 2002-04-24 2003-11-13 Fiedler Heinrich Gmbh Spaltsiebvorrichtung
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
EP1880054B1 (en) * 2005-05-09 2014-10-15 Kadant Canada Corp. Screen basket with replaceable profiled bars
ITVI20070209A1 (it) * 2007-07-31 2009-02-01 Comer Spa Cestello filtrante perfezionato per fibre in sospensione acquosa
FI20070833A0 (fi) * 2007-11-02 2007-11-02 Metso Paper Inc Sihti ja menetelmä sihdin valmistamiseksi
US8297445B2 (en) * 2007-11-14 2012-10-30 Filtration Fibrewall Inc. Screen basket
US20090211965A1 (en) * 2008-02-21 2009-08-27 Weatherford/Lamb, Inc. Arrangement for splicing panels together to form a cylindrical screen
US8028691B2 (en) 2008-10-27 2011-10-04 Johnson Screens, Inc. Passive solar wire screens for buildings
AT509855B1 (de) * 2010-07-29 2011-12-15 Ife Aufbereitungstechnik Gmbh Sieb
US9023456B2 (en) 2011-03-18 2015-05-05 Bilfinger Water Technologies, Inc. Profiled wire screen for process flow and other applications
BE1021342B1 (nl) * 2012-09-04 2015-11-05 Bollaert Bvba Mestfilter.

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US135608A (en) * 1873-02-04 Improvement in metallic fabrics for scouring grain and percolating purposes
AT13493B (fi) * 1900-03-01 1903-09-25 Heinrich Kutschera
FR5703E (fr) * 1909-04-19 1906-06-19 Emile Gobbi Appareil d'épuration de l'eau ou autres liquides
US1362334A (en) * 1919-03-10 1920-12-14 Frank E Marcy Ball-mill
GB173999A (en) * 1921-04-12 1922-01-19 Robert Emmott Improvements in pulverising or disintegrating machines
US1414132A (en) * 1921-09-27 1922-04-25 Hurrell Guy Clement Filter and filter press
US1770977A (en) * 1928-03-05 1930-07-22 Allis Chalmers Mfg Co Screen
US1937274A (en) * 1931-03-12 1933-11-28 Brown Co Screen plate
US2346647A (en) * 1940-11-28 1944-04-18 Edward E Johnson Inc Well screen
CH307958A (de) * 1953-11-04 1955-06-30 August Beutler Friedrich Filter.
US3381355A (en) * 1963-08-19 1968-05-07 Wedge Wire Corp Method of screen assembly
BE678506A (fi) * 1966-03-25 1966-05-31
SU859520A1 (ru) * 1979-10-17 1981-08-30 Проектно-Конструкторское И Технологическое Бюро Химического Машиностроения Министерства Химического И Нефтяного Машиностроения Фильтрующий элемент щелевого сита дл волокнистой суспензии
US4374169A (en) * 1981-09-14 1983-02-15 Uop Inc. Abrasion resistant, reinforced screen panel member
FR2572950B1 (fr) * 1984-11-12 1987-01-23 Lamort E & M Perfectionnements aux tamis pour epurateurs et a leur mode de fabrication

Also Published As

Publication number Publication date
FI89283C (fi) 1993-09-10
FI89283B (fi) 1993-05-31
ES2022648B3 (es) 1991-12-01
EP0287408A1 (fr) 1988-10-19
FR2612081B1 (fr) 1991-02-08
FI881172A0 (fi) 1988-03-11
DE3862505D1 (de) 1991-05-29
FR2612081A1 (fr) 1988-09-16
FI881172A (fi) 1988-09-14
JP2598667B2 (ja) 1997-04-09
US4828689A (en) 1989-05-09
JPS63235588A (ja) 1988-09-30

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