EP0093187B2 - Siebkorb für Sortierer zum Sortieren von Fasersuspensionen - Google Patents
Siebkorb für Sortierer zum Sortieren von Fasersuspensionen Download PDFInfo
- Publication number
- EP0093187B2 EP0093187B2 EP82103801A EP82103801A EP0093187B2 EP 0093187 B2 EP0093187 B2 EP 0093187B2 EP 82103801 A EP82103801 A EP 82103801A EP 82103801 A EP82103801 A EP 82103801A EP 0093187 B2 EP0093187 B2 EP 0093187B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter basket
- cavities
- grooves
- wall
- 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
Links
Images
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 invention relates to a screen basket for sorters for sorting fiber suspensions, according to the preamble of claim 1.
- Screen baskets of the type in question can be cylindrical or conical and optionally also be provided with a bottom and / or a lid.
- a strainer basket of the type mentioned at the beginning with slots running in the axial or circumferential direction is e.g. B. from US-A-3 581 903 of the applicant.
- Sieve baskets of this type are produced from a sheet metal which is bent and closed to form a circular cylinder and into which the sieve openings have been incorporated in the flat state.
- the measure to design the sieve openings in such a way that they widen in the forward direction is used because it has been shown that in connection with the cleaning blades or strips of the rotors of the sorters having such a sieve basket there is a risk of blockages which almost completely avoids sieve openings.
- boat-shaped depressions are first milled out of the sheet in plan view for each of the strainer openings from the later outlet side of the strainer wall, whereupon slots are sawn into the sheet from the same sheet side with a thin circular saw blade, each arranged on the keel of the depressions are.
- the milling out of the recesses is not only necessary because the sieve openings are to expand in the forward direction for the reason described above, but the pressure difference prevailing in the case of so-called pressure sorters between the inflow and outlet sides of the sieve basket requires a relatively thick sieve basket wall, into which the fine ones required are required Otherwise slots could not be sawn.
- the milled recesses must also be made with a much greater length than the sieve opening slots, which further increases the weakening of the screen basket wall.
- the transverse spacing of the sieve opening slots from one another must be chosen to be relatively large, so that the webs remaining between the sieve openings give the sieve basket wall a reasonably sufficient rigidity, a circumstance which predetermines the maximum throughput of fiber suspension through a known sieve basket of the type in question Dimensions reduced.
- the sieve plates processed in the manner described cannot be bent into an absolutely round strainer basket, because the ring zones not provided with milled recesses and sawn slots for attaching the reinforcement rings do not have the same deformation properties as the areas with sieve openings in between.
- the invention had for its object to provide a screen basket for sorters for sorting fiber suspensions and in particular for pressure sorters, which has widening in the forward direction and slot-shaped screen openings on the upstream side and whose wall has a greater strength for a given wall thickness even without reinforcement rings or the like than the known strainer baskets of the type described.
- this object can be achieved by the features of the characterizing part of claim 1.
- the wells in question can be z. B. particularly easy to produce by milling if they are circular cylindrical.
- the sheet or other material for the screen basket wall is stretched, i.e. processed flat state before it is formed into the screen basket.
- the design according to the invention leads to sieve opening slots of different lengths, which is advantageous, among other things, because this results in a sieve basket, the stability of which resembles that of a perforated hole Sieve basket comes close.
- the screen basket wall can also be bent into an absolutely round screen basket without great difficulty if the depressions form a regular pattern and are, in particular, circular-cylindrical, because then there are no preferred directions of the screen basket wall with regard to the bending rigidity.
- a sieve basket with a predetermined maximum throughput can be reduced in such a way that the drive energy for the rotor can be reduced by up to 20%, and further energy savings are made possible by eliminating the recesses which have not been milled out Areas of the wall of the known screen baskets the total screen area can be reduced by up to about 23%.
- FIGS 1 to 3 show a screen basket 10 for a pressure sorter, in which the fiber suspension to be sorted, the screen basket from the outside in, i.e. Flow in the direction of arrow A in Figure 1.
- the screen basket wall 12 has an upper and a lower ring area 14 and 16 without screen openings for mounting the screen basket in the pressure sorter.
- the outside of the screen basket wall is provided with circumferential grooves 18 arranged at equal intervals from one another, while circular cylindrical recesses 20 have been milled out of the inside of the screen basket wall, the depth of which is so great that sieve opening slots 22 result in the overlap region of the circumferential grooves 18 and the recesses 20 .
- the centers of the depressions 20, which have been designated by “C” in FIG. 2 lie at the corners of an equilateral triangle which was indicated by dash-dotted lines in FIG. 2 for three mutually adjacent depressions.
- the non-perforated areas 24 of the screen basket wall 12 form a network structure between the depressions 20, which gives the screen basket wall 12 the required rigidity.
- the depth of the recesses 20 and depth “e” of the grooves 18 should be so large that the value (D - d) is approximately 0.8 to 1.2 mm, while «e» is approximately 0.9 to 1.3 mm.
- FIGS. 1 to 3 shows a sieve basket 10 'which likewise flows through from the outside inwards, with grooves 18' running in the axial direction, so that sieve opening slots 22 'running in the axial direction surrender.
- the strainer basket 10 'shown in FIG. 5 as a third embodiment is designed for through-flow from the inside out, i.e. provided in the direction of arrow B and it has circumferential grooves 18 "on the inside, while circular cylindrical depressions 20" lie on the outer side of the strainer basket.
- the screen opening slots also run here in the circumferential direction and were designated 22 ".
- grooves 18, 18 'and 18 do not necessarily have to run in the circumferential direction or in the direction of the axis of the strainer basket, for example it would easily be possible for the grooves 18' to unite with the vertical form an acute angle.
- Such a strainer basket according to the invention is characterized by an even greater stability, since the weakening of the strainer basket wall due to the grooves 18 and 18 'present outside the depressions is eliminated.
- the invention thus created a screen basket in which the sum of the clear openings of the screen basket wall and their stability are greater than in the known screen baskets with slot-like screen openings widening in the direction of passage (given values for the screen basket height and the screen basket diameter), which under Another reason for this is that the screen basket is perforated everywhere outside its assembly areas.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Filtering Materials (AREA)
- Filtration Of Liquid (AREA)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP82103801A EP0093187B2 (de) | 1982-05-04 | 1982-05-04 | Siebkorb für Sortierer zum Sortieren von Fasersuspensionen |
DE8282103801T DE3265205D1 (en) | 1982-05-04 | 1982-05-04 | Screen drum for a pulp stock screening apparatus |
AT82103801T ATE14763T1 (de) | 1982-05-04 | 1982-05-04 | Siebkorb fuer sortierer zum sortieren von fasersuspensionen. |
CA000426764A CA1205044A (en) | 1982-05-04 | 1983-04-26 | Screen cage for separators for sorting fibre suspensions |
US06/488,672 US4529519A (en) | 1982-05-04 | 1983-04-26 | Screen cage for separators for sorting fibre suspensions |
JP58076320A JPS58202007A (ja) | 1982-05-04 | 1983-05-02 | 繊維懸濁液分離用分離機のスクリ−ンケ−ジ |
FI831508A FI74058B (fi) | 1982-05-04 | 1983-05-03 | Silkorg foer sorteringsanordning foer fibersuspensioner. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP82103801A EP0093187B2 (de) | 1982-05-04 | 1982-05-04 | Siebkorb für Sortierer zum Sortieren von Fasersuspensionen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0093187A1 EP0093187A1 (de) | 1983-11-09 |
EP0093187B1 EP0093187B1 (de) | 1985-08-07 |
EP0093187B2 true EP0093187B2 (de) | 1990-02-28 |
Family
ID=8189017
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82103801A Expired - Lifetime EP0093187B2 (de) | 1982-05-04 | 1982-05-04 | Siebkorb für Sortierer zum Sortieren von Fasersuspensionen |
Country Status (7)
Country | Link |
---|---|
US (1) | US4529519A (fi) |
EP (1) | EP0093187B2 (fi) |
JP (1) | JPS58202007A (fi) |
AT (1) | ATE14763T1 (fi) |
CA (1) | CA1205044A (fi) |
DE (1) | DE3265205D1 (fi) |
FI (1) | FI74058B (fi) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3607457A1 (de) * | 1986-03-07 | 1987-09-10 | Voith Gmbh J M | Sortiersieb |
US4795560A (en) * | 1987-04-16 | 1989-01-03 | The Black Clawson Company | Screen plates |
US4901417A (en) * | 1987-08-05 | 1990-02-20 | The Black Clawson Company | Method of finishing screen plates |
JPS6443318A (en) * | 1987-08-10 | 1989-02-15 | Arai Tekkosho Kk | Multipurpose cylindrical element for filtration or separation |
DE3940334A1 (de) * | 1989-12-06 | 1991-06-13 | Finckh Maschf | Sieb fuer drucksortierer fuer fasersuspensionen |
US5513757A (en) * | 1994-06-02 | 1996-05-07 | Sulzer Papertec Mansfield Inc. | Continuous cut slotted screen basket |
SE505400C2 (sv) * | 1995-11-08 | 1997-08-18 | Capricell Ab | Barriär för avvattning av fibersuspensioner |
AU2003221774A1 (en) * | 2002-04-24 | 2003-11-10 | Frey A. Frejborg | A screen section, screen cylinder, screening device, and method of screening fibrous material |
CN200954409Y (zh) * | 2006-06-27 | 2007-10-03 | 香港理工大学 | 通过减少阻塞而具有更优性能的过滤器 |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE545967C (de) * | 1932-03-08 | Constantin Noetzel | Laeuterboden | |
NL48947C (fi) * | ||||
US874418A (en) * | 1907-02-21 | 1907-12-24 | Joseph H Mcevoy | Straining-plug. |
US1375222A (en) * | 1918-01-16 | 1921-04-19 | William F J Lutz | Drain-fitting |
FR30891E (fr) * | 1925-08-19 | 1926-10-04 | Perfectionnements aux filtres à liquide | |
US1743953A (en) * | 1929-03-12 | 1930-01-14 | John D Beatty | Paper-screen-cleaning device |
US1780882A (en) * | 1929-07-18 | 1930-11-04 | Martin F Kettler | Well screen |
FR845346A (fr) * | 1938-08-10 | 1939-08-18 | Delbag Deutsche Luftfilter Bau | Filtre fin à humectation visqueuse |
GB579562A (en) * | 1940-12-26 | 1946-08-08 | Cfcmug | Improvements in filters |
GB681379A (en) * | 1949-12-08 | 1952-10-22 | John Wardle | Improvements in or relating to strainers for liquids |
GB841207A (en) * | 1956-01-18 | 1960-07-13 | Muller Jacques | Improvements in filters or sifting elements |
US2998064A (en) * | 1957-12-11 | 1961-08-29 | Improved Machinery Inc | Strainer construction |
GB879759A (en) * | 1959-05-05 | 1961-10-11 | Ingersoll Rand Canada | Outward flow pressure screen |
US3250063A (en) * | 1963-10-31 | 1966-05-10 | M S A Res Corp | Filter and clips for holding same in a frame |
DE1905832U (de) * | 1964-09-16 | 1964-12-03 | Hermann Finckh G M B H | Sichter fuer papierstoff-suspensionen. |
US3390774A (en) * | 1967-08-28 | 1968-07-02 | Chevron Res | Spin-on type filter with dual valve and dual filter media |
DE1611145A1 (de) * | 1967-12-11 | 1970-09-03 | Roland Soelch | Verfahren zur Herstellung von Spaltfilterkoerpern fuer Feinstfiltration |
US4262744A (en) * | 1979-04-19 | 1981-04-21 | Certain-Teed Corporation | Molded fittings and methods of manufacture |
GB2051871B (en) * | 1979-06-22 | 1983-03-09 | Nat Res Dev | Zinc/cadmium chloride electrolysis |
JPS5637393A (en) * | 1979-08-30 | 1981-04-11 | Mitsubishi Heavy Ind Ltd | Screen apparatus for paper stock |
DE3113734A1 (de) * | 1980-04-22 | 1982-02-04 | British Sidac Ltd., Watford, Hertfordshire | "rueckspuelbare filteriervorrichtung" |
JPS574208A (en) * | 1980-06-10 | 1982-01-09 | Totoku Electric Co Ltd | Filter |
US4276159A (en) * | 1980-06-19 | 1981-06-30 | The Black Clawson Company | Apparatus for screening paper fiber stock |
SU921593A1 (ru) * | 1980-09-15 | 1982-04-23 | Государственный проектно-конструкторский и экспериментальный институт угольного машиностроения | Фильтр |
US4415613A (en) * | 1981-08-24 | 1983-11-15 | Jonas Medney | Method for making strengthened porous pipe and resulting product |
-
1982
- 1982-05-04 EP EP82103801A patent/EP0093187B2/de not_active Expired - Lifetime
- 1982-05-04 AT AT82103801T patent/ATE14763T1/de not_active IP Right Cessation
- 1982-05-04 DE DE8282103801T patent/DE3265205D1/de not_active Expired
-
1983
- 1983-04-26 US US06/488,672 patent/US4529519A/en not_active Expired - Fee Related
- 1983-04-26 CA CA000426764A patent/CA1205044A/en not_active Expired
- 1983-05-02 JP JP58076320A patent/JPS58202007A/ja active Granted
- 1983-05-03 FI FI831508A patent/FI74058B/fi not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
JPS58202007A (ja) | 1983-11-25 |
EP0093187A1 (de) | 1983-11-09 |
EP0093187B1 (de) | 1985-08-07 |
US4529519A (en) | 1985-07-16 |
FI831508L (fi) | 1983-11-05 |
JPH0246716B2 (fi) | 1990-10-17 |
CA1205044A (en) | 1986-05-27 |
DE3265205D1 (en) | 1985-09-12 |
ATE14763T1 (de) | 1985-08-15 |
FI831508A0 (fi) | 1983-05-03 |
FI74058B (fi) | 1987-08-31 |
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