US3591001A - Sifting apparatus - Google Patents

Sifting apparatus Download PDF

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Publication number
US3591001A
US3591001A US796039A US3591001DA US3591001A US 3591001 A US3591001 A US 3591001A US 796039 A US796039 A US 796039A US 3591001D A US3591001D A US 3591001DA US 3591001 A US3591001 A US 3591001A
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US
United States
Prior art keywords
drum
prism
frame
frame means
cylindrical drum
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
Application number
US796039A
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English (en)
Inventor
Guy Quesnel
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.)
Stein and Roubaix SA
Original Assignee
Stein and Roubaix SA
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 Stein and Roubaix SA filed Critical Stein and Roubaix SA
Application granted granted Critical
Publication of US3591001A publication Critical patent/US3591001A/en
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Expired - Lifetime 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
    • B07B1/18—Drum screens

Definitions

  • ABSTRACT A sifting apparatus comprising screens arranged in polygonal formation within a rotary drum, the assembly of screens being resiliently suspendedwithin the drum and subjected to vibration by a motor driving eccentric weights.
  • the present invention relates to sifting apparatus, such as sieves, for separating particulate materials in dependence upon their sizes by passing them through screens.
  • the sieves at present used are either cylindrical or conical structures pierced with suitable openings and driven in rotation, or flat sieves subjected to pulses and vibrations.
  • the first type of apparatus that exerts a crumbling action by repeated reversal of the mass has the disadvantage of involving clogging of the openings, such that the efficiency is low.
  • the second type of apparatus in which the vibration of the mass causes stratification favourable to sifting, has however the disadvantage of being very cumbrous.
  • a sieve according to the invention comprises a cylindrical drum capable of being driven in rotation and in which is suspended a frame which is solid with means capable of cansing it to vibrate and which supports sifting means disposed along the faces of a prism coaxial with the drum, means permitting feeding of products to be sifted into the interior of the frame, and means effecting the evacuation of the retained material and of the fine particles.
  • the frame is suspended in the drum by springs, in such manner that the vibrations of the frame are not communicated to the drum.
  • the unit With a suitable driving speed of the drum the unit is set in rotation and, moreover, the sifting plates vibrate.
  • the product slides, continuously cascading lightly on to the plate owing to the vibrations.
  • the clogging effects are greatly reduced and, moreover, the space occupied by the apparatus is reduced.
  • FIG. I is a diagrammatic view in axial section ofa sifting apparatus according to the invention.
  • FIG. 2 is a cross section on the line II/II in FIG. 1.
  • the sieve illustrated in the drawing comprises a cylindrical drum 1 capable of being driven in rotation.
  • the drum preferably rests on four pneumatic tires or trains of pneumatic tires 2 which both support and drive the said drum.
  • the driving in rotation may be effected through the intermediary of speed reduction gearing 3 driven by a motor 4.
  • the pneumatic tires are supported by a chassis 5.
  • Means prevent any longitudinal movement of the drum.
  • a steelplate 6 welded at right angles to the drum and extending between two horizontal friction rollers 7 likewise fixed to the chassis 5.
  • a movable frame 9 which supports sifting plates or screens 10 disposed along the faces of a prism coaxial with the drum.
  • the ends of the plate comprise hooks such as 10a cooperating with hooks ll of the frame, one of the hooks being capable of being shifted by virtue of a bolt system lla. In this manner the plates are kept straight.
  • the movable frame 9 is made solid, by means ofcrosspieces such as 9a and a generally Y-shaped end support structure 9b, with a motor 12 with eccentric flyweights which is intended to cause the frame 9 to vibrate in the interior of the drum 1, this latter being prevented from vibrating owing to the suspension by springs 8.
  • the sieve according to the invention may be used horizontally, in which case an advancing movement may be imparted to the material on the sifting plate by unbalancing one of the flyweights 13 relative to the other one 14.
  • the apparatus may equally well be inclined in such manner as to impart a natural advancing movement 0 the material.
  • the sieve is completed by a feeding channel 15 bringing the product to be sifted into a drum 15a communicating with the interior of the prism defined by the frame 9 and the sifting plates.
  • the retained products are evacuated via a channel 16 fed by the outlet drum 16a, whilst the fine products which have passed through the plate 10 fall into the interior of the drum 1 and are collected at the outlet in a channel 17.
  • the speed of rotation of the sieve is selected so that the product slides on the plate 10 whilst cascading slightly.
  • One of the advantages of such a sifting apparatus according to the invention is that it permits passage beneath the product of a plate which is continuously suitable. Indeed, the particles which have difficulty in passing through the plate and which if they did not would clog it have a tendency to detach themselves when the said plate, subjected to vibrations, reaches the vicinity of the highest point of its path.
  • the sieve according to the invention also has the advantage of relatively small size. Indeed, instead of the flat surface of conventional apparatus there is in fact a surface enveloping a curve that passes beneath it. Assuming, for example, that a particle goes from the point 18 to the point 19(FIG. 1) during the time corresponding to one rotation ofthe drum, the length of the sieve across which it will be obliged to pass is equal to the diameter of the sieve multiplied by 7r.
  • a sifting apparatus for separating particulate materials comprising;
  • said vibration generating means comprises a motor including eccentric weight means connected to said motor, said motor being adapted to drive said eccentric weight means so as to vibrate said frame means 3.
  • said drum is rotatable about a generally horizontal axis, and said eccentric weight means comprise unbalanced weights so as to generate vibrations deflecting said frame means relative to said axis, thereby advancing the particulate materials to be sifted along the length of said prism.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
US796039A 1968-02-09 1969-02-03 Sifting apparatus Expired - Lifetime US3591001A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR139277 1968-02-09

Publications (1)

Publication Number Publication Date
US3591001A true US3591001A (en) 1971-07-06

Family

ID=8645771

Family Applications (1)

Application Number Title Priority Date Filing Date
US796039A Expired - Lifetime US3591001A (en) 1968-02-09 1969-02-03 Sifting apparatus

Country Status (8)

Country Link
US (1) US3591001A (ja)
BE (1) BE727831A (ja)
DE (1) DE6905064U (ja)
ES (1) ES363587A1 (ja)
FR (1) FR1562132A (ja)
GB (1) GB1229552A (ja)
LU (1) LU57884A1 (ja)
NL (1) NL6902020A (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3403818A1 (de) * 1983-02-17 1984-08-23 Voest-Alpine Ag, Wien Siebvorrichtung
US4636304A (en) * 1984-03-31 1987-01-13 Hein, Lehmann Ag Drum screening machine
US4797204A (en) * 1988-03-14 1989-01-10 Rotex, Inc. Automatic particle-size analyzer with divided drum
US20180345320A1 (en) * 2015-12-08 2018-12-06 Kabushiki Kaisha Kinki Method of controlling the operation of vibration screen
US10363576B2 (en) * 2015-01-29 2019-07-30 Oijense Bovendijk B.V. Screening device and method for separating dry granular material

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4442343C2 (de) * 1994-11-29 1998-12-10 Kurt Schnellbacher Kalibriervorrichtung
CN104785434A (zh) * 2015-04-01 2015-07-22 山东海领船舶机械有限公司 齿轮驱动机构滚筒筛

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1117106A (en) * 1913-11-26 1914-11-10 Wilhelm Teg Dustless ash-sifter.
DE425713C (de) * 1925-01-30 1926-02-23 Badische Maschinenfabrik & Eis Aufbereitungsanlage fuer Formsand
US2296851A (en) * 1941-02-11 1942-09-29 John F Henry Road machine
US2653521A (en) * 1945-11-10 1953-09-29 Ahlfors Sten Eskil Einarsson Apparatus for wet-treating fibrous matters
US2702633A (en) * 1947-10-20 1955-02-22 Leon M Dekanski Vibrating trommel screen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1117106A (en) * 1913-11-26 1914-11-10 Wilhelm Teg Dustless ash-sifter.
DE425713C (de) * 1925-01-30 1926-02-23 Badische Maschinenfabrik & Eis Aufbereitungsanlage fuer Formsand
US2296851A (en) * 1941-02-11 1942-09-29 John F Henry Road machine
US2653521A (en) * 1945-11-10 1953-09-29 Ahlfors Sten Eskil Einarsson Apparatus for wet-treating fibrous matters
US2702633A (en) * 1947-10-20 1955-02-22 Leon M Dekanski Vibrating trommel screen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3403818A1 (de) * 1983-02-17 1984-08-23 Voest-Alpine Ag, Wien Siebvorrichtung
US4636304A (en) * 1984-03-31 1987-01-13 Hein, Lehmann Ag Drum screening machine
US4797204A (en) * 1988-03-14 1989-01-10 Rotex, Inc. Automatic particle-size analyzer with divided drum
US10363576B2 (en) * 2015-01-29 2019-07-30 Oijense Bovendijk B.V. Screening device and method for separating dry granular material
US20180345320A1 (en) * 2015-12-08 2018-12-06 Kabushiki Kaisha Kinki Method of controlling the operation of vibration screen
US10610897B2 (en) * 2015-12-08 2020-04-07 Kabushiki Kaisha Kinki Method of controlling the operation of vibration screen

Also Published As

Publication number Publication date
NL6902020A (ja) 1969-08-12
DE6905064U (de) 1972-01-20
LU57884A1 (ja) 1969-05-21
BE727831A (ja) 1969-07-16
GB1229552A (ja) 1971-04-28
ES363587A1 (es) 1971-01-01
FR1562132A (ja) 1969-04-04

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