EP0104458B1 - Tamis pour centrifuge et procédé de fabrication dudit tamis - Google Patents

Tamis pour centrifuge et procédé de fabrication dudit tamis Download PDF

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Publication number
EP0104458B1
EP0104458B1 EP83108449A EP83108449A EP0104458B1 EP 0104458 B1 EP0104458 B1 EP 0104458B1 EP 83108449 A EP83108449 A EP 83108449A EP 83108449 A EP83108449 A EP 83108449A EP 0104458 B1 EP0104458 B1 EP 0104458B1
Authority
EP
European Patent Office
Prior art keywords
sieve
centrifuge
drum
bars
slots
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
Application number
EP83108449A
Other languages
German (de)
English (en)
Other versions
EP0104458A2 (fr
EP0104458A3 (en
Inventor
Leonhard Spiewok
Jozsef Fényes
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.)
Sulzer Escher Wyss AG
Original Assignee
Sulzer Escher Wyss 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 Sulzer Escher Wyss AG filed Critical Sulzer Escher Wyss AG
Priority to AT83108449T priority Critical patent/ATE27554T1/de
Publication of EP0104458A2 publication Critical patent/EP0104458A2/fr
Publication of EP0104458A3 publication Critical patent/EP0104458A3/de
Application granted granted Critical
Publication of EP0104458B1 publication Critical patent/EP0104458B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/08—Rotary bowls
    • B04B7/12—Inserts, e.g. armouring plates
    • B04B7/16—Sieves or filters

Definitions

  • the invention relates to a centrifuge sieve with a support provided on the inside of a centrifugal drum, which carries sieve bars made of wear-resistant material and running in the axial direction of the centrifugal drum.
  • Centrifuge sieves are known from DE-A 2830388 or US-A 4259136, in which the sieve rods protecting the centrifugal drum from wear are attached to the drum supporting structure by means of adhesive bonds.
  • elastic intermediate layers are provided in these connections, e.g. Rubber intermediate elements.
  • Rubber intermediate elements are not sufficiently durable in operation.
  • they allow mobility in several directions, which allows undesired and impermissible deformations of the sieve bars and support structure against each other.
  • Another disadvantage is the poor manufacturability, in particular the difficult and unsuitable for mass production assembly of the sieve bars on the inside of the centrifugal drum or the support structure.
  • EPC In the older, but not prepublished EP-A 71 012, which belongs to the state of the art according to Art. 54 (3) EPC, but is not important for the inventive step, is a centrifugal sieve with a centrifugal drum on the inside provided support structure, which carries in the axial direction of the centrifugal drum, made of wear-resistant material sieve bars. To compensate for different thermal expansions, the sieve bars are each firmly and non-displaceably connected to the support structure at one point, while grooves or screws are provided at all other connection points and are movable in axially extending slot-shaped holes. However, replacing defective or worn sieve bars is troublesome, and the manufacture of such a centrifuge sieve is complicated and labor intensive.
  • the invention has for its object to avoid the above-mentioned disadvantages of the prior art and in particular to create a centrifuge sieve in which the sieve rods are durable, temperature and corrosion resistant, movable in a defined manner against the supporting structure and connected to it and easy to assemble , with the sieve rods being easily exchangeable without the operation and shape of the centrifuge being restricted.
  • this object is achieved in that either the sieve bars or the support structure have webs which engage in grooves or slots of the same shape in the other part, so that the sieve bars can only be moved in the axial direction with respect to the support structure.
  • the centrifuge sieve shown in FIGS. 1, 2 and 3 has a centrifugal drum T with a drum diameter from the decimeter to the meter range, on the inside of which a sieve-like support structure 1 rests, on the inside of which a plurality of, for example made of a hard material, in turn serves as wear protection or another suitable material existing sieve bars 2 with a thickness of a few millimeters and a length of up to about 30 cm in the axial direction of the centrifugal drum are attached at a small lateral distance from one another.
  • the support structure 1 is made of a suitable metal, for example steel, and has sieve slots 3 or holes for the filtrate to pass through during centrifugation. Instead, however, the support structure can also consist of a framework of rings which are connected to one another by axially parallel rods, so that the required sieve slots are created between the rods.
  • annular webs 4 are provided, on which the supporting structure 1, which can also have annular webs 7 on the outside, possibly rests on spacers 8, a path for the filtrate to pass through the spaces 5 between the sieve bars 2, the underlying slots 3 of the support structure 1, the space 9 between the support structure and the drum and the slots 6 offset from the sieve bar spaces are formed in the drum T. If the slots are not or only slightly offset from one another, the spacers can also be dispensed with.
  • the sieve bars 2 can be made of a wear-resistant hard material, e.g. Melt basalt or sintered material such as sintered ceramic or cemented carbide, e.g. Aluminum oxide or tungsten carbide. If the requirements are somewhat lower, a suitable wear-resistant steel can be used as the material or a particularly wear-resistant steel, e.g. Plastic reinforced with glass or carbon fibers or another suitable material. Since temperature fluctuations of up to 100 ° C can occur during operation of the centrifuge, the materials of the sieve rod, e.g. Tungsten carbide, and the supporting structure, e.g. Steel, when fastening the sieve bars 2 to the supporting structure 1, precautions are taken for a length compensation in order to avoid deformations and breakage of the sieve bars. For this purpose, 2 dovetail-shaped webs 10 are provided on the support surface of the sieve bars, which engage in corresponding, identical grooves or slots 11 in the support structure.
  • a wear-resistant hard material e.g. Melt basalt or sin
  • the described arrangement and guidance of the sieve bars causes the sieve bars 2 to be immovable in the radial direction, but a length compensation is possible in the longitudinal direction, that is to say in the axial direction of the centrifugal drum. Movement in the circumferential direction is made impossible by the axial alignment of the grooves 11.
  • FIG. 4 shows another example in which a plurality of layers of sieve bars 2 1 , 2 2 are arranged a short distance behind one another in the axial direction, the connection of sieve bars 2 1 , 2 2 and supporting structure 1 again by means of webs and slots 11 1 and 11 2 eg in the form of a dovetail guide. Between the sieve bars 2 1 , 2 2 several rows of sieve slots 3 1 , 3 2 are provided in the support structure 1, through which the filtrate can flow off. In comparison to the first example, the use of several layers of sieve bars allows a longer length of the sieve drum, up to several meters. This is particularly advantageous for sintered materials that only allow a limited rod length.
  • the support structure can also consist of several parts arranged one behind the other in the axial direction, each support structure part, for example, carrying only one sieve bar layer, but it is also readily possible to provide several, for example two, layers, the introduction of the sieve bars into the slots can be done from both sides.
  • the sieve bars 2 have webs 10 with a rectangular cross-section on their support surface 12 on the supporting structure 1 which extend in the axial direction.
  • Corresponding slots 11 are provided in the supporting structure 1, into which the webs 10 fit exactly and are possibly clamped.
  • the webs 10 can also be provided on the supporting structure 1, while the sieve bars are provided with corresponding slots 11.
  • the cross section of the webs 10 and slots 11 according to FIG. 7 is expediently chosen to be trapezoidal, i.e. in the form of a dovetail guide.
  • Securing the rods against falling out is also possible with a different geometric shape of the webs, e.g. As shown in FIG. 8, with a rounded shape with a constriction 13 near the support surface 12 and a corresponding design of the slot with an inward expansion.
  • a plurality of parallel webs 10 1 , 10 2 can also be provided on the same part, for example on the sieve bars 2 .
  • the slots can be designed as deeply limited grooves, as shown in the examples described above, or as deep slots, e.g. the support structure consists of separate bars, which are connected at the ends at most.
  • the sieve bars can expand and contract practically unhindered in the direction of the drum axis, but are immobile in the circumferential and radial directions.
  • the assembly and replacement of the sieve bars is extremely easy.

Landscapes

  • Centrifugal Separators (AREA)
  • Combined Means For Separation Of Solids (AREA)

Claims (8)

1. Tamis pour centrifugeuse, comportant un dispositif d'appui (1) prévu sur l'intérieur d'un tambour de centrifugation (T) et portant des barres de tamisage (2) qui sont parallèles à l'axe du tambour et constituées par une matière très résistante à l'usure, les barres (2) ou, au choix, le dispositif d'appui (1) comportant des languettes (10), qui s'accrochent dans des rainures ou fentes (11) de même forme, pratiquées dans l'autre partie, de sorte qu'une mobilité des barres par rapport au dispositif d'appui est assurée seulement dans le sens axial.
2. Tamis pour centrifugeuse suivant la revendication 1, caractérisé en ce que les languettes (10) sont prévues sur les barres de tamisage (2) et que les rainures ou fentes (11) le sont sur le dispositif d'appui.
3. Tamis pour centrifugeuse suivant la revendication 1 ou 2, caractérisé en ce que les languettes (10) ont une section transversale rectangulaire.
4. Tamis pour centrifugeuse suivant la revendication 1 ou 2, caractérisé en ce que les languettes (10) présentent un rétrécissement (13).
5. Tamis pour centrifugeuse suivant la revendication 4, caractérisé en ce que les languettes (10) ont une section transversale trapézoïdale et qu'elles forment avec les rainures ou fentes (11) un guidage en queue-d'aronde.
6. Tamis pour centrifugeuse suivant les revendications 1 à 5, caractérisé en ce que les barres de tamisage (2) et/ou le dispositif d'appui (1) présentent plusieurs languettes (10) et/ou rainures ou fentes (11) parallèles entre elles.
7. Tamis pour centrifugeuse suivant une des revendications 1 à 6, caractérisé en ce que les barres de tamisage (2) sont en un matériau fritté, en particulier de la céramique frittée, comme de l'oxyde d'aluminium, du basalte fondu ou du carbure fritté, comme du carbure de tungstène.
8. Tamis pour centrifugeuse suivant les revendications 1 à 7, caractérisé en ce que le dispositif d'appui (1) portant les barres de tamisage (2) est formé par la partie intérieure du tambour de centrifugation (T).
EP83108449A 1982-09-27 1983-08-27 Tamis pour centrifuge et procédé de fabrication dudit tamis Expired EP0104458B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83108449T ATE27554T1 (de) 1982-09-27 1983-08-27 Zentrifugensieb und verfahren zu dessen herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5675/82A CH657287A5 (de) 1982-09-27 1982-09-27 Zentrifugensieb.
CH5675/82 1982-09-27

Publications (3)

Publication Number Publication Date
EP0104458A2 EP0104458A2 (fr) 1984-04-04
EP0104458A3 EP0104458A3 (en) 1985-05-29
EP0104458B1 true EP0104458B1 (fr) 1987-06-03

Family

ID=4297516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108449A Expired EP0104458B1 (fr) 1982-09-27 1983-08-27 Tamis pour centrifuge et procédé de fabrication dudit tamis

Country Status (6)

Country Link
US (1) US4569761A (fr)
EP (1) EP0104458B1 (fr)
JP (1) JPS59136153A (fr)
AT (1) ATE27554T1 (fr)
CH (1) CH657287A5 (fr)
DE (1) DE3371872D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108883424A (zh) * 2016-04-06 2018-11-23 东京滤器株式会社 油分离器

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US5165548A (en) * 1990-04-23 1992-11-24 Hemlock Semiconductor Corporation Rotary silicon screen
AU666963B2 (en) * 1992-08-19 1996-02-29 Letella Pty. Ltd. Screening apparatus
US5378364A (en) * 1992-09-14 1995-01-03 Baker Hughes Incorporated Conical screen basket centrifuge
DE19502572C2 (de) * 1995-01-27 1998-02-12 Krauss Maffei Ag Filterzentrifuge
USRE38494E1 (en) * 1998-07-13 2004-04-13 Phase Inc. Method of construction for density screening outer transport walls
US6312610B1 (en) * 1998-07-13 2001-11-06 Phase Inc. Density screening outer wall transport method for fluid separation devices
WO2001045852A1 (fr) * 1999-12-22 2001-06-28 Phase Inc. Procede de construction des parois exterieures d'une centrifugeuse
CA2444486C (fr) * 2001-04-16 2013-04-02 J & L Fiber Services, Inc. Epurateur a pate a papier et son procede
US6755969B2 (en) 2001-04-25 2004-06-29 Phase Inc. Centrifuge
US6805805B2 (en) * 2001-08-13 2004-10-19 Phase Inc. System and method for receptacle wall vibration in a centrifuge
US6706180B2 (en) * 2001-08-13 2004-03-16 Phase Inc. System for vibration in a centrifuge
US20030150782A1 (en) * 2002-02-14 2003-08-14 Chao-Ho Chen Screen for paper pulp
EP1610879A4 (fr) * 2003-03-11 2007-02-21 Phase Inc Centrifugeuse a decharge modulable des materiaux denses
US6971525B2 (en) * 2003-06-25 2005-12-06 Phase Inc. Centrifuge with combinations of multiple features
WO2005011848A1 (fr) * 2003-07-30 2005-02-10 Phase Inc. Systeme de filtration et procede de separation de fluide dynamique
EP1663461A4 (fr) * 2003-07-30 2009-01-14 Phase Inc Systeme de filtration a nettoyage ameliore et separation de fluide dynamique
US7282147B2 (en) * 2003-10-07 2007-10-16 Phase Inc. Cleaning hollow core membrane fibers using vibration
BRPI0519346B1 (pt) * 2004-12-23 2019-05-07 Metso Minerals (Sweden) Ab Barra de cursor feita de material elastomérico, tela metálica de material elastomérico e forro resistente ao desgaste de material elastomérico
US10576502B2 (en) 2012-05-25 2020-03-03 Derrick Corporation Injection molded screening apparatuses and methods
US11161150B2 (en) 2012-05-25 2021-11-02 Derrick Corporation Injection molded screening apparatuses and methods
MY197340A (en) 2012-05-25 2023-06-14 Derrick Corp Injection molded screening apparatuses and methods
US9409209B2 (en) 2012-05-25 2016-08-09 Derrick Corporation Injection molded screening apparatuses and methods
EP3507029A4 (fr) * 2016-08-30 2020-01-15 Schmacker Investments PTY Ltd Élément de fil métallique et procédé de fabrication de fil métallique
WO2018201043A2 (fr) 2017-04-28 2018-11-01 Derrick Corporation Compositions thermoplastiques, procédés, appareil et utilisations
US11505638B2 (en) 2017-04-28 2022-11-22 Derrick Corporation Thermoplastic compositions, methods, apparatus, and uses
CN107020046B (zh) * 2017-05-15 2019-09-06 南京工程学院 一种适用于离心筛选的固体混料器
US11213857B2 (en) 2017-06-06 2022-01-04 Derrick Corporation Method and apparatus for screening
CN110799274A (zh) 2017-06-06 2020-02-14 德里克公司 用于筛分的方法和装置

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US3100746A (en) * 1960-04-20 1963-08-13 Inland Steel Co Screening apparatus
ZA715725B (en) * 1970-08-28 1972-05-31 Dunlop Holdings Ltd Improvements in sieve screens
CA979375A (en) * 1972-06-26 1975-12-09 Delta Precision Casting Co. Pocket screen assemblies for centrifugal separators and replacements therefor
GB1495208A (en) * 1975-06-20 1977-12-14 Greening & Sons Ltd N Screening apparatus
CH624315A5 (fr) * 1977-07-22 1981-07-31 Escher Wyss Ag
GB2033242A (en) * 1978-10-20 1980-05-21 Greening N Ltd Screening Apparatus
CH654759A5 (de) * 1981-07-24 1986-03-14 Escher Wyss Ag Zentrifugensieb.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108883424A (zh) * 2016-04-06 2018-11-23 东京滤器株式会社 油分离器

Also Published As

Publication number Publication date
US4569761A (en) 1986-02-11
JPH0355183B2 (fr) 1991-08-22
JPS59136153A (ja) 1984-08-04
EP0104458A2 (fr) 1984-04-04
EP0104458A3 (en) 1985-05-29
CH657287A5 (de) 1986-08-29
DE3371872D1 (en) 1987-07-09
ATE27554T1 (de) 1987-06-15

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