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EP0173638A2 - Empêchement du blocage par coincement des tamis à disques - Google Patents

Empêchement du blocage par coincement des tamis à disques Download PDF

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Publication number
EP0173638A2
EP0173638A2 EP85630134A EP85630134A EP0173638A2 EP 0173638 A2 EP0173638 A2 EP 0173638A2 EP 85630134 A EP85630134 A EP 85630134A EP 85630134 A EP85630134 A EP 85630134A EP 0173638 A2 EP0173638 A2 EP 0173638A2
Authority
EP
European Patent Office
Prior art keywords
disks
shaft
spacers
shafts
screening
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.)
Withdrawn
Application number
EP85630134A
Other languages
German (de)
English (en)
Inventor
Eduard Josef Thoma
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.)
Beloit Corp
Original Assignee
Beloit Corp
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 Beloit Corp filed Critical Beloit Corp
Publication of EP0173638A2 publication Critical patent/EP0173638A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/12—Apparatus having only parallel elements
    • B07B1/14—Roller screens
    • B07B1/15—Roller screens using corrugated, grooved or ribbed rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/50—Cleaning
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01B—MECHANICAL TREATMENT OF NATURAL FIBROUS OR FILAMENTARY MATERIAL TO OBTAIN FIBRES OF FILAMENTS, e.g. FOR SPINNING
    • D01B1/00—Mechanical separation of fibres from plant material, e.g. seeds, leaves, stalks

Definitions

  • This invention relates, in general, to disk screens, and is more particularly concerned with solving a problem encountered in certain uses of such screens wherein there is a liability of particles jamming when not large enough to be scalped from the material being screened and not quite small enough to pass through the screen.
  • Patents 4 037 723, 4 239 119 and 4 301 930 which are characterized by having a screening bed provided with a series of corotating spaced parallel shafts each of which has a longitudinal series of concentric screen disks which interdigitate with the screen disks of the adjacent shafts.
  • the spaces between the disks permit material of smaller size to pass downwardly through the rotating disk bed. Since the disks are all driven to corotate in a common direction from the infeed end of the screen bed to the outfeed or discharge end of the bed, the particles of material which are larger than the spaces between adjacent disks will be advanced on the bed to the outfeed end of the bed.
  • screening chips for paper pulp purposes it is desirable to remove any material over a certain dimension from the properly dimensioned chips which fall through the screen.
  • the objective is generally to remove oversize and add material such as slivers, trim ends, rocks, etc.
  • the through flow, or as sometimes referred to underflow, of the disk bed of the screen, free from slivers, sticks, trim ends, rocks, and the like, is in most cases the desired hog fuel product.
  • the through flow may represent the rejects and the overflow, or oversize material may be transferred to process or rechipping, hogging or fractionating, depending on the type of material and its end use.
  • Each disk may be about 9 mm thick and about 432 mm in overall diameter. There may be eleven disks spaced apart bout 102-6 mm on each alternate shaft and twelve disks similarly spaced on the other shafts, with the disks of adjacent shafts interdigitated and the spacing between the interdigitated disks being about 25-5 mm . Any particles smaller than such interdigitated disk spacing will fall through as the material is advanced across the screening bed, and larger particles will be moved on. Some particles may be of such an intermediate size or irregular shape that there is a tendency to jam between interdigitated disks. For example, uneven particles such as rocks or tramp metal, or even some wood particles which may be partially smaller than the between the disk spaces and in other respects slightly larger may tend to migrate wedgingly between and jam the disks.
  • the present invention provides a disk screen apparatus comprising a screening bed having a series of corotating spacedparallel elongate shafts each of which has thereon a longitudinal series of concentric screen disks which interdigitate in axially spaced relation with companion screen disks on the adjacent shafts.
  • the screening bed is adapted to screen from particulate material particles which are oversize relative to the axial screening spaces between interdigitated disks, and resiliently yieldable means are provided for normally maintaining the disks in generally parallel screening relation to one another on the shafts, such means permitting adjacent interdigitated disks to deflect relatively when a migrant particle tends to engage wedgingly between the interdigitated disks, so that the migrant particle will be prevented from jamming the engaged disks but will be cleared therefrom automatically in the continuing rotation of the disks.
  • a disk screen apparatus 5 of the kind with which the present invention is concerned comprises a frame 7 supporting a screening bed 8 having a series of corotating equally spaced parallel shafts 9 of generally similar coextensive length and each of which has thereon a longitudinal series of equally spaced concentric screen disks 10 which interdigitate, as best seen in Fig. 2, with the screen disks of the adjacent shafts.
  • a differential number of the disks 10 on the alternate shafts 9 such as eleven disks alternating with twelve disks.
  • the screen bed 8 may comprise twelve of the shafts 9 carrying, in the aggregate, 138 of the disks 10.
  • the shafts 9 are preferably hollow tubular and of noncircular cross section (Figs. 3 and 4 ) and provided with respective stub shafts 11 at their opposite ends which are suitably journaled on the frame 7.
  • Means are provided, as is customary, for driving the shafts 9 and thereby the disks 10 in unison in the same direction, clockwise as seen in Fig. 1, part of the drive means being identified at 13.
  • Material such as hog fuel to be screened is delivered to the infeed end of the screening bed 8 by means of a chute 14.
  • the arrangement may be such that desirable size particles of the material drop down through the screen bed 8 and are received in a hopper 15 for disposition while oversize and odd shaped particles are carried on the screening bed 8 toward the discharge end of the bed. Those particles which are advanced by the screen bed 8 to its discharge end are discharged to an outfeed chute 17, as indicated by directional arrow.
  • the disks 10 are preferably of round lobed, undulating perimeter having a uniform series of lobes 18(Fig. 3) and mounting of the disks on the respective shafts 9 is desirably with the disks alternately torsionally offset along each shaft to have the lobes alternate substantially as seen in Fig. 3.
  • Such alternation is provided for in the assembling of each set of disks on its shaft by having the shafts of substantially square cross-section and the disks provided with respective central apertures 19 which are of the generally complementary cross-section to the shafts and with clearance notches 20 aligned with the corners of the shaft perimeters.
  • Resiliently yieldable means are provided for normally maintaining the disks 10 in generally parallel screening relation to one another on their shafts 9, and such means permitting adjacent interdigitated disks in the screen bed 8 to deflect relatively when a migrant particle MP tends to engage wedgingly between interdigitated disks 10, so that the migrant particle MP will be prevented from jamming the engaged disks but will be cleared therefrom automatically in the continuing rotation of the disks in the screen bed.
  • resiliently yieldable, generally annular spacers 21 are mounted on the shaft 9, in each intance, between each pair of adjacent disks 10 therealong for maintaining a substantially accurate longitudinally spaced relation between the disks.
  • the spacers 21 comprise molded elastomeric members of a 70° Shore hardness, solid polyurethane being suitable for the purpose.
  • the elastomer may, if preferred, be fabric reinforced similarly as conveyor belting to attain adequate stiffness and durability while still allowing sufficient resilient deformation for the present purpose.
  • the spacers 21 are molded with respective central passthrough openings 22 which are complementary to closely fit the perimeter of the associated shaft 9 in corotatively keyed relation. All of the spacers 21 are of equal length. On their outer perimeters, the spacers 21 may be cylindrical and of a diameter, at least at their endsequal to the inside diameter of annular mounting shoulders provided by concentric annular rings 23 attached as by means of welding to the respective opposite faces of each of the disks 10 adjacent to and about the central clearance holes 19 in the disks. By having the central openings 19 in the disks slightly oversize relative to the perimeter of the associated shaft 9, the shoulder rings 23 are adapted to support the disks 10 in uniformly loosely spaced relation to the associated shaft.
  • the spacers 21 will normally maintain the disks 10 in substantially accurate spaced parallel relation.
  • the resilient spacers 21 are adapted to yield as the disks are deflected and permit the particle MP to be automatically cleared to move onward or pass through the screen in the continuing rotation of the disks in the screen bed.
  • the series of spacers is placed under endwise axial inward snug-up compression by means of retainer plates 24 received slidably about the outwardly projecting portions of the respective stub shafts 11 and drawn up by means of bolts 25 against the outer ends of respective adaptor spacers 27 of similar construction as the spacers 21.
  • the bolts 25 are threaded into an associated outer filler or spacer plate 28 which may be welded to and project a short distance outwardly from the adjacent end of the shaft 9 to serve as a stop to avoid overcompressing the series of spacers 21,27 which are placed under endwise thrusting compression by the retainer plate 24 in each instance.
  • a stabilizer filler plate 29 may be secured as by welding to the inside of the associated hollow shaft 9 and the inner end portion of the associated stub shaft 11 in each instance.
  • the disks 10 may be permitted by virtue of their resiliently yieldable mounting and the clearance relation to the shafts in which the inner perimeters of the disks are maintained by the spacers 21, to have about 3 mm relative movement when an article such as the particle MP tends to wedge between any pair of interdigitated disks. It will be apparent that in Fig. 2 the relative deflection has been somewhat exaggerated for illustrative purposes. Any objects or particles large enough to resist dropping down between disks will be carried on the screen bed 8 to discharge, while any objects or particles which are smaller than would tend to wedge between the disks will automatically pass through the screen bed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Laminated Bodies (AREA)
  • Duplication Or Marking (AREA)
  • Paper (AREA)
EP85630134A 1984-08-31 1985-08-21 Empêchement du blocage par coincement des tamis à disques Withdrawn EP0173638A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US64613584A 1984-08-31 1984-08-31
US646135 1984-08-31

Publications (1)

Publication Number Publication Date
EP0173638A2 true EP0173638A2 (fr) 1986-03-05

Family

ID=24591911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85630134A Withdrawn EP0173638A2 (fr) 1984-08-31 1985-08-21 Empêchement du blocage par coincement des tamis à disques

Country Status (9)

Country Link
EP (1) EP0173638A2 (fr)
JP (1) JPS6175894A (fr)
KR (1) KR860001906A (fr)
AU (1) AU4647385A (fr)
BR (1) BR8504115A (fr)
ES (1) ES8608346A1 (fr)
FI (1) FI852997A7 (fr)
NO (1) NO853132L (fr)
PT (1) PT81064B (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274456A3 (en) * 1987-01-08 1989-03-01 Beloit Corporation Disc module spacer improvement
WO1991008058A1 (fr) * 1989-11-29 1991-06-13 Beloit Corporation Crible a disques avec pieces d'ecartement compressibles et disques de protection a bride
US5163564A (en) * 1991-03-18 1992-11-17 Beloit Technologies, Inc. Disc screen with controlled interfacial openings
WO1998020986A1 (fr) * 1996-11-13 1998-05-22 British Technology Group Intercorporate Licensing Limited Separateur de solides
WO2002102526A1 (fr) * 2001-06-15 2002-12-27 Cp Manufacturing, Inc. Tamis a disques, en forme de v, et procede permettant le tri de matieres recyclables melangees
KR100784132B1 (ko) 2007-04-04 2007-12-12 주식회사 포스벨 건설폐기물의 재생골재입도개선 및 이물질 분리장치
RU2326744C2 (ru) * 2006-07-03 2008-06-20 Анатолий Деонисович Кычаков Способ изменения величины просеивающих отверстий классификатора сыпучих материалов и устройство для его осуществления
KR101257940B1 (ko) 2012-08-02 2013-04-24 이장호 폐기물 선별장치
EP2921238A1 (fr) 2014-03-11 2015-09-23 PAL Srl Dispositif de tamisage et tamis de séparation pour le tamisage de matières solides
WO2018202395A1 (fr) * 2017-05-04 2018-11-08 Doppstadt Familienholding Gmbh Dispositif de criblage de produit à cribler

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100655908B1 (ko) * 2005-10-25 2006-12-08 동 석 강 건축폐기물 처리용 디스크 스크린
JP7026383B2 (ja) * 2018-04-23 2022-02-28 株式会社ジェイピーシー 加工屑圧搾装置

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274456A3 (en) * 1987-01-08 1989-03-01 Beloit Corporation Disc module spacer improvement
WO1991008058A1 (fr) * 1989-11-29 1991-06-13 Beloit Corporation Crible a disques avec pieces d'ecartement compressibles et disques de protection a bride
AU641428B2 (en) * 1989-11-29 1993-09-23 Beloit Technologies, Inc. Disk screen with compressible spacers and flanged surrounds
US5163564A (en) * 1991-03-18 1992-11-17 Beloit Technologies, Inc. Disc screen with controlled interfacial openings
WO1998020986A1 (fr) * 1996-11-13 1998-05-22 British Technology Group Intercorporate Licensing Limited Separateur de solides
WO2002102526A1 (fr) * 2001-06-15 2002-12-27 Cp Manufacturing, Inc. Tamis a disques, en forme de v, et procede permettant le tri de matieres recyclables melangees
US6648145B2 (en) * 2001-06-15 2003-11-18 Cp Manufacturing, Inc. V-shaped disc screen and method of classifying mixed recyclable materials into four streams
EP1785199A3 (fr) * 2001-06-15 2007-05-30 CP Manufacturing, Inc. Tamis à disques
RU2326744C2 (ru) * 2006-07-03 2008-06-20 Анатолий Деонисович Кычаков Способ изменения величины просеивающих отверстий классификатора сыпучих материалов и устройство для его осуществления
KR100784132B1 (ko) 2007-04-04 2007-12-12 주식회사 포스벨 건설폐기물의 재생골재입도개선 및 이물질 분리장치
KR101257940B1 (ko) 2012-08-02 2013-04-24 이장호 폐기물 선별장치
EP2921238A1 (fr) 2014-03-11 2015-09-23 PAL Srl Dispositif de tamisage et tamis de séparation pour le tamisage de matières solides
WO2018202395A1 (fr) * 2017-05-04 2018-11-08 Doppstadt Familienholding Gmbh Dispositif de criblage de produit à cribler
RU2728411C1 (ru) * 2017-05-04 2020-07-29 Доппштадт Фамилиенхолдинг Гмбх Устройство для классификации классифицируемого материала
AU2018263545B2 (en) * 2017-05-04 2020-12-10 Doppstadt Familienholding Gmbh Device for the classification of material being classified
US11407009B2 (en) 2017-05-04 2022-08-09 Doppstadt Familienholding Gmbh Apparatus for classification of material to be classified

Also Published As

Publication number Publication date
FI852997L (fi) 1986-03-01
BR8504115A (pt) 1986-06-17
FI852997A0 (fi) 1985-08-02
AU4647385A (en) 1986-03-06
JPS6175894A (ja) 1986-04-18
ES8608346A1 (es) 1986-07-16
KR860001906A (ko) 1986-03-24
PT81064B (en) 1986-12-12
FI852997A7 (fi) 1986-03-01
ES546581A0 (es) 1986-07-16
PT81064A (en) 1985-09-01
NO853132L (no) 1986-03-03

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Inventor name: THOMA, EDUARD JOSEF