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EP0026961A2 - Elément de crible et panneau de crible comportant un tel élément - Google Patents

Elément de crible et panneau de crible comportant un tel élément Download PDF

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Publication number
EP0026961A2
EP0026961A2 EP80300640A EP80300640A EP0026961A2 EP 0026961 A2 EP0026961 A2 EP 0026961A2 EP 80300640 A EP80300640 A EP 80300640A EP 80300640 A EP80300640 A EP 80300640A EP 0026961 A2 EP0026961 A2 EP 0026961A2
Authority
EP
European Patent Office
Prior art keywords
screen
element according
inner part
parts
section
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
Application number
EP80300640A
Other languages
German (de)
English (en)
Other versions
EP0026961B1 (fr
EP0026961A3 (en
Inventor
Clifford Michael Spiller
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT80300640T priority Critical patent/ATE6746T1/de
Publication of EP0026961A2 publication Critical patent/EP0026961A2/fr
Publication of EP0026961A3 publication Critical patent/EP0026961A3/en
Application granted granted Critical
Publication of EP0026961B1 publication Critical patent/EP0026961B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4645—Screening surfaces built up of modular elements

Definitions

  • This invention relates to screening, and in particular to sieve screens produced by connecting together a plurality of sieve elements. Such screens are used in screening machines for dewatering, grading and the like.
  • a plurality of such sieve elements are then bonded together to provide a sieve screen of desired overall dimensions which is then fitted over a support frame in the screening machine.
  • sieve elements have complementary adjacent edge formations to interengage one with the other and for those edge formations to accommodate an elongate interlocking member passing through and bonded in a channel therethrough.
  • the channel is open to one side, namely the under or downstream side, of the elements freely to accept a said elongate interlocking member subsequently bonded therein, say by filling the unoccupied channel section with the material of the screen elements or a bonding or potting material compatible therewith.
  • the cross-section of an elongate interlocking member accommodation channel has an inner part corresponding closely, at least at one side when interlocked,.to the cross-section of said interlocking member and an outer part to a side of the elements that is, at least adjacent to the inner part, of less width and permits snap-in fitting and retention of said interlocking member.
  • the channel cross-section is of generally key-hole shape and its outer part may be divergent sided towards the said element side but usually with a terminal spacing less than the width of the interlocking member.
  • the channel cross-section is oblong to take a correspondingly shaped rod or bar, preferably with retention lips only to one side, the inner, of projections from the sieve elements to engage in the edge of the rod or has alternately from one side and the other.
  • .Width saving between adjacent elements is further enhanced by the use of a preferred interlocking element of so-called wedge wire having a relatively narrow wedge-like section with its tapering convergent sides increased in convergence rate close to its narrow edge. Presentation of that narrow edge to the outer channel part also greatly facilitates insertion of the interlocking element bodily from the side of the elements through the relatively restricted outer channel part. At least as much advantage is gained from my other preferred flattish rod or bar.
  • Polymeric materials such as polyurethane, used for moulding screen elements have substantial flexibility, a feature which, indeed, is believed to contribute to their surprisingly long working life.
  • the screen elements thus require reinforcement at least at their edges, and especially where, as I prefer, pluralities of elements are interconnected together to make up screens or screen parts that are suitably for direct replacement of previous wedge-wire screen elements without the necessity for a special subframe.
  • I have found that oblong screen elements to intercouple at their long edges are extremely satisfactory if formed with a major division of apertured area from long edge to long edge with an incorporated reinforcement following the edges and such division and fabricated from flat steel strip disposed within moulding parts depending from the apertured areas.
  • Such very narrow reinforcement is very good for the purpose of maximising working screen area by minimising the width of reinforcement housing and, most surprisingly, further permits a screen element with quartering reinforcement of 10mm x 2.5 mm mild steel strip and measuring 272 mm x 183 mm (ex interengaging edge parts) x 25 mm (reinforcing housing height) to be bent over its width to a radius of as little as 25 cm, say for the making of centrifuge baskets.
  • an oblong screen element 1 comprises a moulding of polymeric material, specifically with peripheral edging 10, 12 at its long sides and 14, 16 at its short sides defining the overall height h of the element.
  • peripheral edging 10, 12 Centrally between the long side edgings 10, 12 and between the short side edgings 14, 16 are full height ribbings 18 and 20, respectively, with that 20 between the short edges of greater width.
  • the apertured working area of the element is thus quartered into four equal areas 22, 24, 26 and 28 each comprising a grating divided into three parts 30, 32, 34 by equally spaced thin ribs 36, 38 of less than the overall height h and parallel with the longside edgings 10, 12.
  • Each grating part comprises parallel spaced screening bars 40 with downwardly convergent sides 42. These screening bars 40 define the screening particle size, resist blockage by their tapering and are also of very considerable flexibility.
  • the edgings 10 to 16 and ribbings 18, 20 house a welded-up reinforcing steel frame 50 fabricated from flat strip to minimise housing width requirements and thereby maximise apertured working screen area.
  • the long side edgings 10, 12 have outward spaced extensions 52, 54 in a castellated manner and staggered one relative to the other so that, for long side adjacent elements, the extensions 52, 54 snugly interfit.
  • the extensions 52, 54 have channels 56 on them that comprise in section, see Figure 3, an inner part 58 and a relatively narrow outer part 60 to their undersides 61.
  • Elongate interlocking member 62 can be press-fitted through the channel outer parts 60 and into the channel inner parts 58 with, at least when fitted, close sectional correspondence of the interlocking member and the channel outer parts 60.
  • This correspondence will, of course, normally be approximated as closely as possible in manufacture, but due to the resilience of the polymeric material, one-sided tolerances from nominal can be permitted, i.e. oversize for the interlocking member and undersize for the inner channel part.
  • the preferred cross-section of the inner channel parts 58 correspond to that of a wedge wire type interlocking member of which the section has convergent sides 64 from a flat relatively wide edge 66 and of initially constant slope towards its narrower edge 68 near to which the slope increases. This is readily forced narrow edge first into the channels, especially where, as shown, outer parts 60 are divergent sided though terminating at a spacing less than that of the wider wire edge 66.
  • Knocking-off of an individual screen element may be facilitated if the wide wire edge 66 has chamfered corners, or if the wire tapers from its largest width towards both edges, though not necessarily in the same way or to the same extent.
  • FIG. 4 An alternative intercoupling with inner channel part cross-sections oversize relative to the interlocking member is shown in Figure 4 where the inner channel parts 58 are offset as between the interengaging edging extensions 52, 54 to promote snug fitting, but the outer channel parts are maintained aligned so as not to create problems on insertion of the interlocking members bodily and narrow side on.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP80300640A 1979-10-06 1980-03-04 Elément de crible et panneau de crible comportant un tel élément Expired EP0026961B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80300640T ATE6746T1 (de) 1979-10-06 1980-03-04 Siebelement und siebboden mit einem solchen element.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7934767 1979-10-06
GB7934767A GB2059278B (en) 1979-10-06 1979-10-06 Screen construction

Publications (3)

Publication Number Publication Date
EP0026961A2 true EP0026961A2 (fr) 1981-04-15
EP0026961A3 EP0026961A3 (en) 1981-05-13
EP0026961B1 EP0026961B1 (fr) 1984-03-21

Family

ID=10508342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80300640A Expired EP0026961B1 (fr) 1979-10-06 1980-03-04 Elément de crible et panneau de crible comportant un tel élément

Country Status (4)

Country Link
EP (1) EP0026961B1 (fr)
AT (1) ATE6746T1 (fr)
DE (1) DE3067085D1 (fr)
GB (1) GB2059278B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000053343A1 (fr) * 1999-03-08 2000-09-14 Ludowici Mineral Processing Equipment Pty Ltd Appareil de criblage
WO2006031176A1 (fr) 2004-09-15 2006-03-23 Metso Minerals (Wear Protection) Ab Crible et element de crible
CN110116090A (zh) * 2019-05-30 2019-08-13 莫图泰克筛分系统(天津)有限公司 一种波浪形筛板及其生产工艺

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1758860A1 (de) * 1968-08-22 1971-06-03 Stahlgruber Gruber & Co Otto Elastischer Siebboden
GB1458932A (en) * 1975-04-03 1976-12-15 Hutter Schrantz Ag Sieves
GB1558086A (en) * 1976-11-10 1979-12-19 Spiller C M Screening
AT354957B (de) * 1977-02-15 1980-02-11 Hein Lehmann Ag Siebboden
DE2754374A1 (de) * 1977-12-07 1979-06-13 Kueper Gummi Spannbarer siebboden
DE2808940C2 (de) * 1978-03-02 1985-05-02 Hein, Lehmann AG, 4000 Düsseldorf Siebboden

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000053343A1 (fr) * 1999-03-08 2000-09-14 Ludowici Mineral Processing Equipment Pty Ltd Appareil de criblage
WO2006031176A1 (fr) 2004-09-15 2006-03-23 Metso Minerals (Wear Protection) Ab Crible et element de crible
US8469199B2 (en) 2004-09-15 2013-06-25 Metso Minerals (Sweden) Ab Screen and screen element
CN110116090A (zh) * 2019-05-30 2019-08-13 莫图泰克筛分系统(天津)有限公司 一种波浪形筛板及其生产工艺

Also Published As

Publication number Publication date
EP0026961B1 (fr) 1984-03-21
DE3067085D1 (en) 1984-04-26
ATE6746T1 (de) 1984-04-15
GB2059278A (en) 1981-04-23
EP0026961A3 (en) 1981-05-13
GB2059278B (en) 1983-09-21

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