EP0202863A2 - Support frames for screening panels - Google Patents
Support frames for screening panels Download PDFInfo
- Publication number
- EP0202863A2 EP0202863A2 EP86303689A EP86303689A EP0202863A2 EP 0202863 A2 EP0202863 A2 EP 0202863A2 EP 86303689 A EP86303689 A EP 86303689A EP 86303689 A EP86303689 A EP 86303689A EP 0202863 A2 EP0202863 A2 EP 0202863A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- screening
- top plate
- support
- frame
- panels
- 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- Withdrawn
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Images
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
Abstract
A support frame for screening panels such as are used for screening in the mining industry the panels being moulded casts from plastic materials and secured to a support frame by its spigots the screening panel being characterised in that a top plate fabricated from flat steel sheets of metal punched and folded to provide a grid of channel section members (21) to support screening panels and in which are formed holes (10) to receive spigot-like projections provided to fasten the panels and includes supports (15) whereby the top plate can be secured to vibrating screen equipment (22).
Description
- The present invention relates to a support frame for screening panels such as are available from various manufacturers and used in vibrating screening equipment used, for example, for screening in the mining industry.
- Screening panels are known to exist which consist of square or rectangular panels moulded or cast from plastic materials. Screening panels of this type, may be supported on a separate frame to which they are fitted by means of plastic spigots protruding through corresponding holes in the supporting frame, holding the spigots captive. Such spigots may be integral with the screen panel, or integral with a clamping bar which in turn holds the panel(s) captive once in place, or as separate individual parts.
- To accommodate such fastening methods, the supporting frame is provided with a plurality of holes, shaped and arranged in a pattern complementary to the shape and pattern of fastening spigots, as applicable to the panel manufacturers fastening system, so that panels can be readily fastened and removed from the frame as required. Support frames are normally made by fabrication from steel, various parts of the frame being joined by welding. The object of the invention is to provide a light weight support frame for screening panels which is manufactured in such a way that welding is reduced to a minimum and largely confined to the neutral axis of the frame so that under conditions of vibration the likelihood of failure of the welds due to dynamic loads is reduced.
- The present invention consists in a screening panel support frame, consisting of a top plate fabricated from flat steel sheet metal, punched and folded to provide a grid of channel section members to support screening panels and in which are formed holes to receive spigot-like projections provided to fasten the panels, and means to support the top plate whereby it can be secured to vibrating screening equipment.
- In order that the nature of the invention may be better understood a typical form thereof is hereinafter described, by way of example, with reference to the accompanying drawings in which:-
- Figure 1 is a plan view of the top plate of a screening panel support frame according to the invention, after punching and prior to folding;
- Figure 2 is a perspective view of the screening panel support frame after folding in the course of assembly to an arrangement of support beams, support plates and side members.
- Figure 3 is a typical cross-section of the screening panel support frame showing weld positions, and
- Figure 4 is a cross-sectional view of a portion of the screening panel support frame showing the manner in which section of frame may be joined.
- The top plate shown in figure 1 is manufactured from a single sheet of mild steel. Into it are punched a series of
holes 10 which are intended for reception of spigot-like projections. These are arranged in a regular pattern to enable a complete set of screen panels to be arranged over the surface of the frame with the projections on the panels passing through theholes 10. - In addition to the
holes 10 are punchedslots 11 for the reception of tranverse members as described below and alsoholes 12 which are formed at the junction of the lines of severance in the plate to enable folding of the plate to be effected with a minimum of distortion and to prevent stress concentration. - As will be appreciated from Figure 2 in which the screening panel support frame is seen after folding of the top plate, there are lines of severance between substantially triangular portions of the
plate 13 andadjacent portions 14 so that when theportions Transverse channel sections 21 are connected to the longitudinal channel sections by means of a single plate thickness join, which acts as a hinge allowing the frame to accept alternating vertical displacement of the longitudinal formed channel sections (relative to each other), as may prevail when dynamically loaded under influence of the vibration of the equipment on which the screening panel support frame is mounted. - The screening panel support frame is supported on
support beams 15, of tubular cross sections extending along the frame in one direction. These are attached to holding downstrips 16 extending across, betweenside angle plates 17, one of which has been shown. The holding downstrips 16 are fixed in a plane parallel to the plane of the top plate (Fig 1) both of which are connected to regularly spacedsupport beams 15 thus forming a 3-dimensioned box section type frame work, with sufficient rigidity for handling, but flexible enough to accomodate dynamic movement in the vertical plane of transverse and longitudinal members, without creating excessive stresses, thus preventing fatigue failure. Thesupport beams 15 are secured to the top plate by welds as at 19 in Figure 3 which are largely on or about the neutral axis of the frame and are thus minimally stressed during dynamic flexure of the frame. - Additional panel support may be provided by
members 18, extending between theslots 11 and secured in position 9 by welds as at 20 (fig 3) at each end. For the sake of clarity only two such members are shown in Figure 2. - Screening panel support frames as described above can be made in a wide variety of shapes and sizes to suit particular applications.
- A complete screening panel support frame for vibrating equipment may be made up of a plurality of separate sections of support screening panel support frame each of which covers a portion of the total area. In joining up such sections it is important to ensure that the regular spacing of
holes 10 is maintained and one manner of doing this is illustrated in Figure 4 in which twosupport beams 15 each forming part of separate sections of a support frame are connected to across beam 22 which forms part of the vibrating equipment being secured to it by means of nuts and bolts indicated at 23. The significant feature of the arrangement is the fact that the ends of thesupport beams 15 are cut at an angle as shown in Figure 4 so that a diagonally extendingjoin 24 is formed. With this arrangement there is no inteference with any of theholes 10 which are available for engagement by a spigot-like projection of the screening panel, allowing panels to be positioned across the join. - The embodiment of the invention described above is given by way of example only as constituting a preferred form of construction within the general scope of the invention as defined broadly above.
Claims (6)
1. A screening panel support frame, consisting of a top plate fabricated from flat steel sheet metal punched and folded, to provide a grid of longitudinally and tranversely extending channel section members (21), to support screening panels in which are formed holes (10) to receive spigot-like projections provided to fasten the panels and means (15) to support the top plate whereby it can be secured to vibrating screening equipment.
2. A screening panel support frame as claimed in claim 1 wherein the means to support the top plate consists in a plurality of support beams (15) extending beneath and along the frame, the longitudinally extending channel section members (21) being welded to the support beam by means of welds (19) lying on or near the neutral axis of the frame.
3. A screening panel support frame as claimed in claim 1 wherein the transversely extending channel section members (21) formed in the top plate are connected to the longitudinally extending channel section members by means of a plate thickness join, which acts as a hinge, allowing alternating vertical displacement of the longitudinally extending channel section members relative to each other to be accommodated, without giving rise to fatigue failure, when subjected to dynamic load conditions.
4. A screening panel support frame, as claimed in claim 2 wherein holding down strips (16) are fixed in a plane, parallel to the plane of the formed top plate, both of which are connected to regularly spaced support beams (15), thus forming a 3-dimensional box-section type frame work with sufficient rigidity for handling, but flexible enough to'accommodate dynamic movements of the longitudinal (21) and transverse channel section members perpendicular to the plane of the top plate without creating excessive stresses and thus inhibiting fatigue failure.
5. A screening panel support made up of a plurality of sections each contructed as claimed in claim 4, the support beams of one section meeting the support beams of each adjacent section end to end, the meeting ends of the beams being cut at an angle (24) whereby the ends meet in a line extending diagonally across the beams.
6. A screening panel support frame substantially as described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU642/85 | 1985-05-20 | ||
AUPH064285 | 1985-05-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0202863A2 true EP0202863A2 (en) | 1986-11-26 |
EP0202863A3 EP0202863A3 (en) | 1988-07-06 |
Family
ID=3771114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86303689A Withdrawn EP0202863A3 (en) | 1985-05-20 | 1986-05-15 | Support frames for screening panels |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0202863A3 (en) |
ZA (1) | ZA863757B (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990005594A1 (en) * | 1988-11-23 | 1990-05-31 | Western Wire Works, Incorporated | Modular system |
US5049262A (en) * | 1988-11-23 | 1991-09-17 | Galton Zanley F | Modular system |
GB2394195A (en) * | 2002-10-17 | 2004-04-21 | Varco Int | Screening panel |
US6935511B2 (en) | 2002-10-17 | 2005-08-30 | Varco I/P, Inc. | Centrally supported screen assembly |
US6957741B2 (en) | 2001-08-07 | 2005-10-25 | Manfred Franz Axel Freissle | Screening arrangement |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1902855U (en) * | 1964-02-05 | 1964-10-22 | Schenck Gmbh Carl | Sieve tray for sieving hot goods. |
FR2351716A1 (en) * | 1976-05-21 | 1977-12-16 | Steinhaus Gmbh | SIEVE PANEL |
NL7806980A (en) * | 1978-06-28 | 1980-01-03 | Gouda Holland Holdings Sa | Detachable joint for ceiling grid construction - fits between intersecting channel sections with locking lugs and openings above section bottoms |
US4222865A (en) * | 1979-02-16 | 1980-09-16 | Irathane Systems Incorporated | Trommel screen unit |
EP0118800A2 (en) * | 1983-03-05 | 1984-09-19 | Hein, Lehmann Aktiengesellschaft | Screen bottom with replaceable screen elements |
-
1986
- 1986-05-15 EP EP86303689A patent/EP0202863A3/en not_active Withdrawn
- 1986-05-20 ZA ZA863757A patent/ZA863757B/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1902855U (en) * | 1964-02-05 | 1964-10-22 | Schenck Gmbh Carl | Sieve tray for sieving hot goods. |
FR2351716A1 (en) * | 1976-05-21 | 1977-12-16 | Steinhaus Gmbh | SIEVE PANEL |
NL7806980A (en) * | 1978-06-28 | 1980-01-03 | Gouda Holland Holdings Sa | Detachable joint for ceiling grid construction - fits between intersecting channel sections with locking lugs and openings above section bottoms |
US4222865A (en) * | 1979-02-16 | 1980-09-16 | Irathane Systems Incorporated | Trommel screen unit |
EP0118800A2 (en) * | 1983-03-05 | 1984-09-19 | Hein, Lehmann Aktiengesellschaft | Screen bottom with replaceable screen elements |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990005594A1 (en) * | 1988-11-23 | 1990-05-31 | Western Wire Works, Incorporated | Modular system |
US5049262A (en) * | 1988-11-23 | 1991-09-17 | Galton Zanley F | Modular system |
US6957741B2 (en) | 2001-08-07 | 2005-10-25 | Manfred Franz Axel Freissle | Screening arrangement |
US7240801B2 (en) | 2001-08-07 | 2007-07-10 | Manfred Franz Axel Freissle | Screening arrangement |
US7604127B2 (en) | 2001-08-07 | 2009-10-20 | Manfred Franz Axel Freissle | Screening arrangement |
US7621406B2 (en) | 2001-08-07 | 2009-11-24 | Polydeck Screen Corporation | Conversion kit for particulate screening system and related implementation methods |
US8025153B2 (en) | 2001-08-07 | 2011-09-27 | Manfred Franz Axel Freissle | Screening arrangement |
GB2394195A (en) * | 2002-10-17 | 2004-04-21 | Varco Int | Screening panel |
WO2004035231A1 (en) * | 2002-10-17 | 2004-04-29 | Varco I/P, Inc. | A screen for a vibratory separator |
US6935511B2 (en) | 2002-10-17 | 2005-08-30 | Varco I/P, Inc. | Centrally supported screen assembly |
Also Published As
Publication number | Publication date |
---|---|
EP0202863A3 (en) | 1988-07-06 |
ZA863757B (en) | 1987-01-28 |
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18D | Application deemed to be withdrawn |
Effective date: 19890109 |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BOHLKEN, FRITZ O. |