EP0419033B1 - Improvements relating to vibratory sifters - Google Patents
Improvements relating to vibratory sifters Download PDFInfo
- Publication number
- EP0419033B1 EP0419033B1 EP90309017A EP90309017A EP0419033B1 EP 0419033 B1 EP0419033 B1 EP 0419033B1 EP 90309017 A EP90309017 A EP 90309017A EP 90309017 A EP90309017 A EP 90309017A EP 0419033 B1 EP0419033 B1 EP 0419033B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screen
- sifter
- aperture
- chamber
- peripheral
- 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 - Lifetime
Links
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
- B07B1/06—Cone or disc shaped 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
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
- B07B1/38—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens oscillating in a circular arc in their own plane; Plansifters
-
- 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
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for 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
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
- B07B13/14—Details or accessories
- B07B13/16—Feed or discharge arrangements
Definitions
- This invention relates to vibratory sifters, the term "sifters” being used in a broad sense to include the various sieves, screens and the like by which the materials can be screened, graded or separated.
- the term "material” is intended to describe solids, liquids, items or any other substances tobe separated by size.
- material to be separated is supplied to the top of the vibrating screen, oversize material being retained on the top of the screen while undersized material passes through the screen. Oversized material is removed from the periphery of the screen, normally by way of an opening in a peripheral wall surrounding the screen.
- a sifter comprising a resiliently supported circular chamber having a screen fitted in the base, means for subjecting the chamber and screen to a vibro gyratory action having a three dimensional motion of a rotational character having upward and downward components in the movement, means for collecting undersized material passing through the screen and an aperture through the screen adjacent to and inside the periphery of the chamber through which oversized materials from the top of the screen are dischargeable directly below the chamber.
- the apparatus comprises a plurality of vertically spaced screen each having a discharge aperture for oversized particles adjacent to and inside its periphery.
- a discharge chute for oversize material is located beneath the or each aperture, directing oversize material away from the centre of the sifter.
- the mesh is bonded or otherwise fixed to said peripheral and further frames.
- Fig. 1 shows a perspective view of a circular screen.
- the screen comprises a circular peripheral tensioning frame 30 having a mesh 32 bonded, clamped or otherwise fixed to it.
- a mesh 32 bonded, clamped or otherwise fixed to it.
- a multiple progressive sifting operation can be achieved by fitting one above the other in the sifting chamber 14, a plurality of screens, the mesh size of which decreases progressively downwards, each screen having fitted therebelow a discharge chute 38 for over size material, each leading to a separate collecting means, the undersize material falling through an upper screen to the next below screen where it is subject to a further sifting operation, the lowermost screen being provided with a collecting pan 18 and discharge chute 20, for undersize materials passing through the lowermost screen.
- the compression springs 12 on which the vibrating chamber is mounted may be replaced by rubber bushes or any other resilient assemblies.
Landscapes
- Combined Means For Separation Of Solids (AREA)
Description
- This invention relates to vibratory sifters, the term "sifters" being used in a broad sense to include the various sieves, screens and the like by which the materials can be screened, graded or separated. The term "material" is intended to describe solids, liquids, items or any other substances tobe separated by size.
- In certain current vibratory sifters, material to be separated is supplied to the top of the vibrating screen, oversize material being retained on the top of the screen while undersized material passes through the screen. Oversized material is removed from the periphery of the screen, normally by way of an opening in a peripheral wall surrounding the screen.
- Arrangements of this nature have been disadvantageous in that oversize material often tends to accumulate on the peripheral wall especially around the discharge aperture, thereby reducing its efficient discharge.
- United States Patent 4315817 discloses a vibratory system in which the vibrating means imparts a linear, that is essentially a linear back and forth vibration to a screen. Oversized material which has not passed through the screen moves off the edge of a screen and over a flat non-perforate surface before falling through a discharge opening. As a result of this the oversize material has to follow a path, after the screening operation, which is at least as great as the width of the non-perforate surface. This extra travel can result in deterioration of oversized particles that is, contamination by undersized particles. It extends the length of time occupied by the screening operation and consequently results in increased energy consumption. Specification No. GB-A-2085760 also discloses a vibratory material separator.
- It is an object of the present invention to obviate or mitigate these disadvantages.
- According to the present invention there is provided a sifter comprising a resiliently supported circular chamber having a screen fitted in the base, means for subjecting the chamber and screen to a vibro gyratory action having a three dimensional motion of a rotational character having upward and downward components in the movement, means for collecting undersized material passing through the screen and an aperture through the screen adjacent to and inside the periphery of the chamber through which oversized materials from the top of the screen are dischargeable directly below the chamber.
- Preferably the apparatus comprises a plurality of vertically spaced screen each having a discharge aperture for oversized particles adjacent to and inside its periphery.
- Preferably a discharge chute for oversize material is located beneath the or each aperture, directing oversize material away from the centre of the sifter.
- Preferably the collecting means for undersize material has an inclined base and a discharge at the periphery of the sifter.
- Preferably the screen comprises a mesh supported by a peripheral tensioning frame to which the mesh is bonded or otherwise fixed.
- Further according to the present invention there is provided a vibratory sifter screen comprising a peripheral tensioning frame supporting a mesh which has an aperture for oversize material being sifted adjacent to and inside the peripheral frame.
- Preferably a further frame member is attached to the peripheral frame to define said aperture.
- Preferably the mesh is bonded or otherwise fixed to said peripheral and further frames.
- An embodiment of the present invention will now be described by way of example only with reference to the accompanying drawings in which:-
- Fig. 1 shows a perspective view of a separating screen for a sifter,
- Fig. 2 shows a plan of a sifter,
- Fig. 3 shows a sectional elevation on the lines A B of a sifter, and
- Fig. 3A shows an enlarged sectional elevation of part of the sifter.
- A vibratory sifter comprises a
cylindrical base support 10 on which is supported by an annular series of compression springs 12 a vibratory assembly comprising acylinderical sifter chamber 14 in which is mounted asifter screen 16 above a collectingpan 18 for undersize material passing through the screen, thepan 18 having aperipheral discharge chute 20 extending through the side wall of thechamber 14. Thechamber 14 extends upwardly from abase member 22 having acentral mounting ring 24. Anelectric vibrator motor 26 is supported by and below thering 24. The motor shaft projects above and below the motor casing and is fitted with relatively angularly adjustableeccentric weights sifting chamber 14, rotation of the motor imparts to the chamber a vibro-gyratory action in the form of a high frequency rotary oscillation about the central axis of the motor and chamber with an upward and downward component of movement. This causes vibration of the material on the screen with an outwardly spiral motion. Under size particles fall through the screen to be collected in the collectingpan 18 and discharged by way of thechute 20, whereas oversized particles remain on top of the screen and move towards its periphery. - Fig. 1 shows a perspective view of a circular screen. The screen comprises a circular
peripheral tensioning frame 30 having amesh 32 bonded, clamped or otherwise fixed to it. Within the outer periphery of theframe 30 there is provided in the screen anaperture 34 which is reinforced by anarcuate member 36 welded or otherwise attached to theframe 30. Oversized particles at the periphery of the screen fall through theaperture 34 and it will be realised that, unlike earlier vibratory sifters of this nature where oversize material is discharged over the edge of thescreen 30, oversize material discharges effectively through the screen. - Fig. 3 and 3A show that
discharge chute 38 for over size material is located below theaperture 34. and that the screen is replaceable, for example, for cleaning purposes, by removably attaching in thechamber 14 between anupper section 14A and alower section 14B, the sections being clamped together by any suitable means. - Various modifications can be made without departing from the scope of the invention. For example, a multiple progressive sifting operation can be achieved by fitting one above the other in the
sifting chamber 14, a plurality of screens, the mesh size of which decreases progressively downwards, each screen having fitted therebelow adischarge chute 38 for over size material, each leading to a separate collecting means, the undersize material falling through an upper screen to the next below screen where it is subject to a further sifting operation, the lowermost screen being provided with a collectingpan 18 anddischarge chute 20, for undersize materials passing through the lowermost screen. - Various other modifications can be made without departing from the scope of the invention. For example, the compression springs 12 on which the vibrating chamber is mounted may be replaced by rubber bushes or any other resilient assemblies.
- Alternative vibrating means may be provided so long as they impart to materials on the screen a movement causing undersize material to pass through the screen and oversized material to pass to the edge of the screen.
Claims (8)
- A sifter comprising a resiliently supported circular chamber (14) having a screen (10) fitted in its base, means (12,24,26,28,30) for subjecting the chamber and screen to a vibro-gyratory action having a three dimensional motion of rotational character having upward and downward components in the movement, means (18) for collecting undersized material passing through the screen characterised in that an aperture (34) is provided through the screen adjacent to and inside the periphery of the chamber (14) through which oversized materials from the top of the screen are dischargeable directly below the chamber.
- A sifter as claimed in Claim 1, characterised in that there is provided a plurality of vertically spaced screens (10) each having a discharge aperture (34) for oversized particles adjacent to and inside its periphery.
- A sifter as claimed in Claim 1 or Claim 2, characterised in that a discharge chute (38) for oversized material is located beneath the or each aperture (34), directing oversize material away from the centre of the sifter.
- A sifter as claimed in Claim 3, characterised in that the collecting means (18) for undersize material has an inclined base and a discharge (20) at the periphery of the sifter.
- A sifter as claimed in any one of the preceding claims, characterised in that the screen (10) comprises a mesh (32) supported by a peripheral tensioning frame (30) to which the mesh (32) is bonded or otherwise fixed.
- A vibratory sifter screen, characterised in that it comprises a peripheral tensioning frame (10) supporting a mesh (32 )which has an aperture (34) for oversize material being sifted adjacent to and inside the peripheral frame (30).
- A vibratory sifter screen as claimed in Claim 6, characterised in that a further frame member (36) is attached to the peripheral frame (30) to define said aperture (34).
- A vibratory sifter screen as claimed in Claim 7, characterised in that the mesh (32) is bonded to said peripheral and further frames (30,36).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB898921151A GB8921151D0 (en) | 1989-09-19 | 1989-09-19 | Improvements relating to vibratory sifters |
GB8921151 | 1989-09-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0419033A1 EP0419033A1 (en) | 1991-03-27 |
EP0419033B1 true EP0419033B1 (en) | 1994-06-15 |
Family
ID=10663292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90309017A Expired - Lifetime EP0419033B1 (en) | 1989-09-19 | 1990-08-16 | Improvements relating to vibratory sifters |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0419033B1 (en) |
DE (1) | DE69009920T2 (en) |
GB (1) | GB8921151D0 (en) |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9312733U1 (en) * | 1993-08-25 | 1993-10-14 | Allgaier Werke Kg | Vibration tumbler machine |
DE19811746C2 (en) * | 1998-03-18 | 2000-07-13 | Gerald Kainz | Tumbler screening machine |
US6672459B1 (en) * | 2001-04-04 | 2004-01-06 | Southwestern Wire Cloth, Inc. | Integrated terminal deck and spout for vibrating separator and method of fabrication |
KR20040017893A (en) * | 2002-08-22 | 2004-03-02 | 금호엔지니어링(주) | Feed pipe Setting Oscillation Separate Mechanism |
FR2855989B1 (en) * | 2003-06-16 | 2006-11-24 | Gantois Ets | CONTROL SIEVE WITH INTERCHANGEABLE SEPARATION ELEMENT. |
ITMO20060375A1 (en) * | 2006-11-14 | 2008-05-15 | Cuccolini S R L | SCREENING APPARATUS |
FR2980981A1 (en) * | 2011-10-06 | 2013-04-12 | Sodeva Tds | Sieve for perfect separation of powder particles or liquids in industry, has evacuation chute integrated into support frame of sieve for evacuation of particles whose size is greater than vacuum mesh |
CN104174584A (en) * | 2014-08-29 | 2014-12-03 | 安徽海螺川崎节能设备制造有限公司 | Vibration screen structure |
CN104525472A (en) * | 2014-11-24 | 2015-04-22 | 东莞市青麦田数码科技有限公司 | Powdered graphite screening machine |
CN104525474A (en) * | 2014-12-25 | 2015-04-22 | 无锡智数商务信息咨询有限公司 | Screening device for fluidized bed dryer |
CN104550013B (en) * | 2015-01-23 | 2016-05-11 | 中国核动力研究设计院 | Nuclear fuel UO2Microballoon spin vibration sieve separating device |
CN105921400A (en) * | 2016-06-03 | 2016-09-07 | 成都格瑞思文化传播有限公司 | Construction vibrating screen |
WO2019082644A1 (en) * | 2017-10-25 | 2019-05-02 | フジノ工業株式会社 | Vibrating sieve machine |
CN107604793A (en) * | 2017-10-25 | 2018-01-19 | 江苏云端重工科技有限公司 | A kind of drying device for old asphalt mixture recovery |
CN107542026A (en) * | 2017-10-25 | 2018-01-05 | 江苏云端重工科技有限公司 | A kind of old asphalt mixture drying device recovery sub-sieve mechanism |
CN108114894A (en) * | 2017-12-28 | 2018-06-05 | 新乡市振英机械设备有限公司 | A kind of ultrasonic activation sieves clamp device |
CN108592722B (en) * | 2018-04-11 | 2024-03-12 | 贵州贵安新联爆破工程有限公司 | Efficient open-air deep hole blasting fills operation device |
CN108273736B (en) * | 2018-04-20 | 2020-05-05 | 重庆市南川区王小平机械制造有限公司 | Circular vibration screening machine |
CN108580263A (en) * | 2018-05-16 | 2018-09-28 | 福建省复新农业科技发展有限公司 | A kind of antifouling type soya bean screening plant |
CN110337925B (en) * | 2019-07-18 | 2021-03-23 | 安徽润航农业科技开发有限公司 | Three-dimensional ecological symbiotic culture method for Sequoia tsugae, cress and snakehead |
CN110773415A (en) * | 2019-10-24 | 2020-02-11 | 西安寒武纪石油科技有限公司 | Production process of well cementation ceramic hollow microspheres |
CN110787991A (en) * | 2019-11-07 | 2020-02-14 | 含山县官塘石壁茶厂 | High-efficient separator of leaf powder for tea processing |
CN111014020B (en) * | 2019-11-25 | 2021-09-21 | 大同新成新材料股份有限公司 | Screening machine for semiconductor production and screening method thereof |
CN111111870A (en) * | 2019-12-03 | 2020-05-08 | 华侨大学 | Bypass type cement silo discharge pipeline crusher |
US11167316B2 (en) | 2019-12-10 | 2021-11-09 | Schlumberger Technology Corporation | Vibratory separator with a sloped ramp |
CN112139026A (en) * | 2020-08-19 | 2020-12-29 | 淮矿生态农业有限责任公司 | High-quality rice screening mechanism with dust removal function |
CN112570271B (en) * | 2020-12-01 | 2022-05-17 | 杨旭方 | Electronic component quality detection screening device |
CN112718478B (en) * | 2020-12-29 | 2022-04-12 | 重庆聚钡混凝土有限公司 | Multi-layer screen vibrating machine |
CN115350789B (en) * | 2022-07-27 | 2023-06-02 | 威海市东旭西洋参有限公司 | Crushing device and method for processing ginseng refined imperial tea |
CN116786414B (en) * | 2023-08-29 | 2023-11-07 | 绿健园(新乡)生物工程有限公司 | Automatic material-separating vibrating screen and screening process |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4315817A (en) * | 1978-06-05 | 1982-02-16 | Popper Engineering Ltd. | Vibrating surface apparatus |
DE2919500C3 (en) * | 1979-05-15 | 1982-04-15 | Bühler-Miag GmbH, 3300 Braunschweig | Exchangeable flat screen for screening machines |
US4319991A (en) * | 1980-10-24 | 1982-03-16 | Midwestern Industries, Inc. | Material separating machine |
US4563268A (en) * | 1984-10-09 | 1986-01-07 | Polysar Financial Services S.A. | Method of discharging particles from a vibrating filter screen |
GB2182866B (en) * | 1985-10-04 | 1989-11-29 | Endecotts Limited | Sieve shaker |
-
1989
- 1989-09-19 GB GB898921151A patent/GB8921151D0/en active Pending
-
1990
- 1990-08-16 DE DE69009920T patent/DE69009920T2/en not_active Expired - Fee Related
- 1990-08-16 EP EP90309017A patent/EP0419033B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB8921151D0 (en) | 1989-11-08 |
DE69009920D1 (en) | 1994-07-21 |
EP0419033A1 (en) | 1991-03-27 |
DE69009920T2 (en) | 1994-11-10 |
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