WO2012052558A1 - Adapter for screen elements - Google Patents
Adapter for screen elements Download PDFInfo
- Publication number
- WO2012052558A1 WO2012052558A1 PCT/EP2011/068482 EP2011068482W WO2012052558A1 WO 2012052558 A1 WO2012052558 A1 WO 2012052558A1 EP 2011068482 W EP2011068482 W EP 2011068482W WO 2012052558 A1 WO2012052558 A1 WO 2012052558A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- screen
- frame
- attachment
- section
- angle
- Prior art date
Links
- 238000012216 screening Methods 0.000 claims abstract description 14
- 230000007480 spreading Effects 0.000 claims description 13
- 230000007704 transition Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 3
- 241000234295 Musa Species 0.000 description 2
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 2
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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
-
- 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
- the present invention relates to an attachment device for attaching screen elements to a frame of a screening apparatus, comprising a frame attachment portion for attachment to the screen frame and a screen attach- ment portion for attachment of the screen elements.
- the present invention further relates to a screening apparatus comprising a screen frame, a plurality of screen elements, and at least one attachment device attaching said screen elements to said screen frame Background Art
- US-5,462, 175 which discloses an attachment strip having spreading pins that lock into holes in a screen frame and having bolts for securing screen elements on the screen frame.
- the attachment strip may be wedge-shaped in order to create a stair-step screen deck. Attachment strips of this type may be used for attaching screen elements from one manufacturer to a screen frame from another manufacturer.
- FIG. 06/031 176 Another example of a screen attachment device may be seen in WO 06/031 176.
- banana screens in which the screen frame beams are mounted with an angle between them which is less than 180°, thereby forming an arcuate or banana-shaped screen deck.
- An example of a “banana screen” may be found in, e.g., WO 02/1 1908.
- WO 02/1 1908 Around the angle transition point, where there is a change in inclination, the wear becomes particularly intense, thus necessitating more frequent replacement of screen elements.
- An object of the invention is to provide an attachment device for attachment of screen elements to the frame of a screening apparatus which is improved in comparison to prior art attachment devices.
- a particular object of the invention is to provide an attachment device which makes it possible to reduce localised wear in connection with inclination changes on a screen deck.
- An attachment device is characterised in that the frame attachment portion comprises a first frame attachment section and a second frame attachment section, each frame attachment section being arranged to be attached to a first frame section and a second frame section, respectively, said frame sections forming between them a frame angle of less than 180°, and in that said screen attachment portion is curved such that screen elements attached to said screen attachment portion form a screen surface on which said frame angle corresponds to two or more screen angles of less than 180° and larger than said frame angle or which has a circular arc shape.
- the screen attachment portion has a circular arc shape. This is a simple way of ensuring that the screen surface gets a circular arc shape.
- said screen attachment portion comprises at least a first screen attachment section, a second screen attachment section and a third screen attachment section, each screen attachment section being arranged to be attached to a respective screen element, wherein a first and a second of said screen elements form between them a first screen angle and the second and a third screen element form between them a second screen angle, said screen angles being less than 180° and larger than said frame angle.
- This is a convenient way of dividing the frame angle into two or more larger screen angles on the screen surface.
- the screen angles are equal. This makes it possible to make the attachment device mirror-symmetric. It is thereby easier to mount the attachment device on the frame, since it can be placed with either end on either side of the inclination change on the frame without affecting the inclinations of the screen elements that are later attached to the attachment device.
- the frame attachment sections may each comprise a plurality of locking devices for locking onto the frame, the locking devices of said first frame attachment section being arranged in a first plane and the locking devices of said second frame attachment section being arranged in a second plane, said first and second planes forming between them the frame angle.
- the attachment device may be particularly simple in construction.
- the locking devices may comprise spreading pins for locking into holes in said frame. Thereby, it is easy to attach the attachment device to the frame, the spreading pins being compressed while passing through the hole, and the attachment device is securely held in place when the spreading pins have spread again after passing through the hole in the frame.
- the first screen attachment section is arranged to be essentially parallel to said first frame section
- said third screen attachment section is arranged to be essentially parallel to said second frame section
- said second screen attachment section being arranged between said first and third screen attachment sections, said first and second screen attachment sections forming between them said first screen angle and said second and third screen attachment sections forming between them said second screen angle.
- the screen attachment sections may comprise a profiled strip adapted to engage an undercut groove on an underside of said screen elements.
- the screen elements may thereby easily, and securely be attached to the attachment device by simply pressing or hammering down the screen elements onto the profiled strip.
- a curved screen attachment portion may be of a shape which is, e.g. made up of straight portions forming an angle between them, i.e, with an angular bend, or arcuate, or more particularly a circle segment.
- Fig. 1 is a side view of an attachment device attached to the upper side of a frame of a screening apparatus.
- Fig. 2 is cross-sectional perspective view of the attachment device and screen frame of Fig. 1 .
- Fig. 3 is a partial perspective view of a screen element which may be attached to a frame of a screening apparatus by means of the attachment device of Figs 1 and 2.
- Fig. 4 is a side view of an attachment device according to an alternative embodiment attached to the upper side of a frame of a screening apparatus.
- Fig. 5 is a perspective view of the attachment device of Fig. 4.
- Fig. 6 is a perspective view of a screening deck incorporating the attachment device of Fig. 4. Detailed Description of Preferred Embodiments of the Invention
- the attachment device or upgrade strip 1 in Fig. 1 is attached to a beam of a screen frame 2.
- the beam is divided into a first beam portion 2a and a second beam portion 2b.
- the upgrade strip 1 has a frame attachment portion 3, by which the upgrade strip 1 is attached to the frame 2.
- the frame attachment portion 3 is divided into a first frame attachment section 4 and a second frame attachment section 5, each in the form of a plurality of spreading pins 10.
- the spreading pins 10 of the first frame attachment section 4 are arranged in a first plane and the spreading pins 10 of the second frame attachment section 5 are arranged in a second plane. These first and second planes form between them an angle a of less than 180°, such that the upgrade strip 1 may be attached to the frame 2 in which beam portions 2a, 2b form such an angle a which is less than 180°.
- the upgrade strip 1 has a screen attachment portion 6 by which screen elements 12 (see Fig. 3) are attached to the upgrade strip 1 , and hence, to the screen frame 2.
- the screen attachment portion 6 is divided into three screen attachment sections 7, 8, 9.
- the first screen attachment section 7 is parallel to the first beam portion 2a and the third screen attach- ment section 9 is parallel to the second beam portion 2b.
- the second screen attachment portion 8 is arranged between the first and third screen attachment sections 7, 9 and forms with each of these an angle ⁇ , ⁇ 2, which is less than 180°, but which is larger than the angle a between the frame portions 2a, 2b.
- the frame attachment sections 4, 5 have a plurality of locking devices in the form of spreading pins 10 for locking the upgrade strip 1 onto the frame
- the screen attachment sections 7, 8, 9 take the form of profiled strips 1 1 .
- the upgrade strip 1 is attached to the frame 2 by pressing or hammering the spreading pins 10 into holes (not shown) in the frame 2.
- screen elements 12 are attached to the upgrade strip 1 by pressing or hammering the screen elements onto the upgrade strip 1 , such that the profiled strips 1 1 of the up- grade strip 1 enter into undercut grooves 13 on the underside of the screen elements 12.
- FIGs 4-6 An alternative embodiment of the attachment device or upgrade strip is shown in Figs 4-6.
- parts similar to the ones in the embodiment shown in Figs 1 -3 are denoted by the same reference numbers, but with the addition of 100.
- the upgrade strip 101 of Fig. 4 has a frame attachment portion 103, by which the upgrade strip 101 is attached to the frame 102.
- the frame attachment portion 103 is divided into a first frame attachment section 104 and a second frame attachment section 105, each in the form of a plurality of spreading pins 1 10.
- the spreading pins 1 10 of the first frame attachment section 104 are arranged in a first plane and the spreading pins 1 10 of the second frame attachment section 105 are arranged in a second plane.
- These first and second planes form be- tween them an angle a of less than 180°, such that the upgrade strip 101 may be attached to the frame 102 in which beam portions 102a, 102b form such an angle a which is less than 180°.
- the upgrade strip 101 has a screen attachment portion 106 by which screen elements 1 12 are attached to the upgrade strip 101 , and hence, to the screen frame 102.
- the screen attachment portion 6 is curved in a circular arc shape 1 16 such that the screen surface obtains a corresponding circular arc shape 1 15.
- the screen elements 1 12 may be manufactured with the circular arc shape 1 15.
- the screen elements may be manufactured from a slightly flexible material, such that originally flat screen elements 1 12 may be bent to the desired circular arc shape 1 15.
- the upgrade strip 101 is attached to the frame 102 in essentially the same manner as described above in connection with Figs 1 -3 by means of locking devices 1 10.
- the screen surface 1 14 may be formed essentially without transition angles.
- the angle a formed by the beams of the frame is 170° and the angles ⁇ - ⁇ , ⁇ 2 are 175°.
- the upgrade strip of the invention may be adapted to other angles of the frame.
- the angle of the frame may also be split up into more than two angles between the screen elements. The angles need not necessarily be equal.
- the upgrade strip is made in one part.
- the upgrade strip of the invention could also be made in separate parts, preferably two or three parts. If the upgrade strip is made up of two parts, these are advantageously formed as two essentially identical halves of the upgrade strip shown in Fig. 1 , each half comprising a respective one of the transitions of the angles ⁇ , ⁇ 2 . The two halves could also have different angles of transition. If the upgrade strip is made up of three parts, a first part could be made to correspond to the leftmost portion of the upgrade strip 1 of Fig.
- transition angles could be equal or different.
- the attachment sections may have other kinds of locking devices for locking the upgrade strip onto the frame.
- the locking devices are preferably adapted to the kind of frame to which the upgrade strip and screen elements are to be attached.
- locking devices in the form of bolts and nuts may be used, although it is preferable to use locking devices that do not require tools.
- the screen attachment sections may have other forms than the profiled strip shown in Fig. 2.
- Profiled strips with other shapes may be used, adapted to the shape of an undercut groove on the underside of the screen elements to be attached.
- Other principles of attaching the screen elements to the screen frame are also feasible, for instance using pro- filed studs on the attachment device that lock into corresponding recesses on the underside of the screen elements.
- the attachment devices are preferably made of stainless steel, but may also be made of elastomeric material, such as polyurethane.
Landscapes
- Overhead Projectors And Projection Screens (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2011317542A AU2011317542B2 (en) | 2010-10-22 | 2011-10-21 | Adapter for screen elements |
BR112013009790A BR112013009790A2 (en) | 2010-10-22 | 2011-10-21 | CONNECTING DEVICE FOR CONNECTING SIEVING ELEMENTS TO A FRAME OF A SCREENING APPARATUS AND SCREENING APPARATUS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10188518A EP2444167B1 (en) | 2010-10-22 | 2010-10-22 | Adapter for screen elements |
EP10188518.4 | 2010-10-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012052558A1 true WO2012052558A1 (en) | 2012-04-26 |
Family
ID=43576658
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2011/068482 WO2012052558A1 (en) | 2010-10-22 | 2011-10-21 | Adapter for screen elements |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2444167B1 (en) |
AU (1) | AU2011317542B2 (en) |
BR (1) | BR112013009790A2 (en) |
CL (1) | CL2013001098A1 (en) |
WO (1) | WO2012052558A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103817071A (en) * | 2013-11-28 | 2014-05-28 | 浙江乐客来机械有限公司 | Candied fruit screening device |
CN108515012A (en) * | 2018-03-12 | 2018-09-11 | 泸州市银桩农业有限公司 | A kind of feed two-stage screening plant for big chicken |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5248043A (en) * | 1992-02-28 | 1993-09-28 | Dorn Lloyd A | Modular retro-fit screen system for a screening deck |
US5462175A (en) | 1993-02-10 | 1995-10-31 | Western Wire Works, Inc. | Screen lining |
WO2002011908A1 (en) | 2000-08-09 | 2002-02-14 | Ludowici Mineral Processing Equipment Pty Ltd | Screening apparatus |
WO2006031176A1 (en) | 2004-09-15 | 2006-03-23 | Metso Minerals (Wear Protection) Ab | Screen and screen element |
US20090166268A1 (en) * | 2007-12-19 | 2009-07-02 | Sandvik Intellectual Property Ab | Vibrating screen having a wear protection |
-
2010
- 2010-10-22 EP EP10188518A patent/EP2444167B1/en active Active
-
2011
- 2011-10-21 WO PCT/EP2011/068482 patent/WO2012052558A1/en active Application Filing
- 2011-10-21 BR BR112013009790A patent/BR112013009790A2/en not_active IP Right Cessation
- 2011-10-21 AU AU2011317542A patent/AU2011317542B2/en active Active
-
2013
- 2013-04-22 CL CL2013001098A patent/CL2013001098A1/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5248043A (en) * | 1992-02-28 | 1993-09-28 | Dorn Lloyd A | Modular retro-fit screen system for a screening deck |
US5462175A (en) | 1993-02-10 | 1995-10-31 | Western Wire Works, Inc. | Screen lining |
WO2002011908A1 (en) | 2000-08-09 | 2002-02-14 | Ludowici Mineral Processing Equipment Pty Ltd | Screening apparatus |
WO2006031176A1 (en) | 2004-09-15 | 2006-03-23 | Metso Minerals (Wear Protection) Ab | Screen and screen element |
US20090166268A1 (en) * | 2007-12-19 | 2009-07-02 | Sandvik Intellectual Property Ab | Vibrating screen having a wear protection |
Also Published As
Publication number | Publication date |
---|---|
CL2013001098A1 (en) | 2014-01-03 |
EP2444167B1 (en) | 2013-03-20 |
BR112013009790A2 (en) | 2023-12-26 |
AU2011317542A1 (en) | 2013-05-09 |
AU2011317542B2 (en) | 2015-03-26 |
EP2444167A1 (en) | 2012-04-25 |
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