EP3944904A1 - Dispositif de tamissage - Google Patents

Dispositif de tamissage Download PDF

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Publication number
EP3944904A1
EP3944904A1 EP21184305.7A EP21184305A EP3944904A1 EP 3944904 A1 EP3944904 A1 EP 3944904A1 EP 21184305 A EP21184305 A EP 21184305A EP 3944904 A1 EP3944904 A1 EP 3944904A1
Authority
EP
European Patent Office
Prior art keywords
sieve
screen
frame
section
screening device
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
EP21184305.7A
Other languages
German (de)
English (en)
Other versions
EP3944904B1 (fr
EP3944904C0 (fr
Inventor
Martin Wegen
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.)
Wegen GmbH
Original Assignee
Wegen GmbH
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 Wegen GmbH filed Critical Wegen GmbH
Publication of EP3944904A1 publication Critical patent/EP3944904A1/fr
Application granted granted Critical
Publication of EP3944904B1 publication Critical patent/EP3944904B1/fr
Publication of EP3944904C0 publication Critical patent/EP3944904C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B07B1/40—Resonant vibration 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
    • B07B1/50—Cleaning
    • 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

  • the invention relates to a screening device for finely divided, powdery material to be screened, comprising an essentially horizontally extending screen and a vibration drive for the screen, as well as a screen attachment which is arranged above the screen and delimits a receiving space for the material to be screened above the screen.
  • the sieve attachment delimiting the receiving space is part of a housing surrounding the sieve and is usually made of metal, in particular polished stainless steel, since in this way it can be made to oscillate well on the one hand and on the other hand it meets the hygiene requirements prevailing in the food industry, for example.
  • U.S. Patent No. 6,003,679 also describes a screening device for screenings with a horizontally extending screen and a vibration drive for the
  • Powders containing oil and/or fat which are used, for example, in food processing, can be mentioned as an example. Under the slightest pressure, such powders tend to secrete substances containing fat or oil, which wet the surface of the individual powder grains and cause the material to be screened to clump or cake in the receiving space above the screen. The effect of pressure due to the vibration drive is already sufficient for this effect to occur, so that the corresponding screening devices often become blocked and have to be cleaned in a laborious manner.
  • the object of the invention is therefore to propose a screening device of the type mentioned at the outset, which reliably counteracts clumping and sticking on the screen surface even with critical screened goods and enables stable operation, but at the same time meets the applicable hygiene standards, for example in the food industry.
  • the solution according to the invention is based on the fact that the screen attachment has a frame, for example made of metal, and a frame in the vertical Includes stretched-out hose section made of a rubber-elastic material, which delimits the receiving space along its inner surface and can be made to oscillate by means of the vibration drive.
  • the screen attachment which until now has been made entirely of rigid material, for example stainless steel, is replaced in the area of its walls delimiting the receiving space by a flexible material in the form of the hose section made of rubber-elastic material.
  • the hose section is connected to the frame at its upper and lower end area and stretched freely between the end areas, resulting in a particularly intensive vibration of the inner surface of the hose section delimiting the receiving space.
  • the hose section can be formed from a suitable natural or synthetic rubber, with the material thickness being easily selectable by a person skilled in the art according to the circumstances.
  • the hose section is glued to the frame at its upper and lower end area or connected to the frame by means of clamping devices, for example hose clamps.
  • the framework can comprise two cylinder sections which are arranged concentrically to one another and are connected at a vertical distance by means of struts and to which the end regions of the hose section are fastened.
  • a ring-shaped sieve carrier can be inserted into the lower cylinder section, within which the sieve is clamped.
  • the cross-sectional design of the screen is not subject to any general restrictions, but the screen and the receiving space delimited by the hose section are preferably circular in cross-section.
  • a drain pan for the sieved material is provided below the sieve, which together with the sieve attachment forms a closed housing or housing in which the sieve is arranged.
  • the drain pan can be funnel-shaped, for example, in order to be able to easily discharge the sieved screenings below the sieve.
  • the drainage tray which is in particular funnel-shaped, can also be made of a flexible, rubber-elastic material in the form of a funnel-shaped hose section in the area of the surfaces in contact with the material to be screened, which is stretched in a corresponding frame.
  • the funnel-shaped discharge tray is also made to vibrate by the vibration drive, with deposits of the screenings being effectively counteracted due to the elastic material properties.
  • the cylindrical section in which the screen is held is made of a rigid metal, whereas the surfaces of the housing arranged above and below the screen are made of elastic tube sections.
  • a particularly compact and easily dismantled structural unit is created if, according to a further embodiment of the invention, the frame can be detachably inserted into the drain pan with the sieve being placed in between and can be connected to the drain pan to form a unit, for example by means of suitable clamping means, which can then also be jointly driven by the vibration drive can be made to oscillate.
  • the only figure shows a schematic side view of a sieve device 1, which comprises a housing consisting of a drain pan 12 and a sieve attachment 11 attached thereto, between which a sieve 10 stretched essentially horizontally within a sieve carrier 100 extends.
  • the other components of the screening device such as supply and discharge lines for the material to be screened, are not shown, nor is a vibrating drive which causes the screen 10 and at least the screen attachment 11 and the drain pan 12 to vibrate in a manner known per se.
  • the screening device 1 shown can be assembled in a few simple steps and can also be dismantled again for cleaning purposes. Starting from the drain pan 12 arranged below in relation to the screen 10 , this has a funnel shape with a wall 121 tapering or narrowing conically in the direction of an outlet opening 122 , with a cylindrical receiving region 120 adjoining the wall 121 .
  • the screen attachment 11 has a lower cylinder section 113 which can be inserted according to arrows B into the receiving area 120 of the drain pan 12 .
  • a further cylinder section 112 with a smaller diameter is spaced apart vertically by a number of vertically extending struts 110 Sieve attachment 11 is held, with a tube section 111 stretched out in the vertical direction and made of a rubber-elastic material being provided between the upper cylinder section 112 and the lower cylinder section 113, which extends the distance between the upper cylinder section 112 and the lower cylinder section 113 in the vertical direction, which is determined by the struts 110 free, ie spanned without support.
  • the hose section 111 is routed with its upper end region 114 around the upper cylinder section 112 to the outside and is fastened there by means of fixing means, for example a hose clamp, which are not shown in detail.
  • the hose section 111 is guided twice around the lower cylinder section 113, bending at 90°, and is fixed on the outer surface of the lower cylinder section 113, for example by means of an adhesive connection. If the sieve attachment 11 is inserted into the receiving area 120 of the drain pan 12 according to arrows B, the lower end area 115 of the hose section 111 is located between the lower cylinder section 113 and the receiving area 120 and serves as a dust-proof seal due to its rubber-elastic material properties.
  • the tube section 111 is made, for example, from a natural or synthetic rubber and in this respect is also suitable for applications in the food industry.
  • the horizontally extending screen 10 like the lower drain pan 12 and the cylinder sections 112, 113 and struts 110 of the screen attachment 11, is preferably made of stainless steel and is clamped within a dimensionally stable screen carrier 100, which, when the screen attachment 11 is removed from the drain pan 12, can be lifted from the underside can be used in the lower cylinder section 113 ago.
  • the sieve attachment 11 thus forms a receiving space 13, delimited by the inner surface of the hose section 111, for the sieve material to be placed on the sieve 10 and to be sieved. This is introduced into the receiving space 13 via a feed opening (not shown).
  • the walls of the sieve attachment 11 laterally delimiting the receiving space 13 are formed by the freely movably stretched hose section 111, this is also made to vibrate by the vibration drive and oscillates periodically back and forth according to arrows A. If the material to be screened is conveyed radially outwards on the screen 10, it is immediately thrown back radially in the direction of the center of the screen upon contact with the vibrating inner surface of the tube section 111, which effectively prevents a tendency to clump even with critical screenings.
  • the drain pan 12 is made of a metallic material, in particular stainless steel.
  • the discharge tray 12 can also be formed by a correspondingly conical hose section made of rubber-elastic material, in order to also counteract adhesions of the screenings in the area of the discharge tray 12 .
  • the screening device explained above is therefore particularly suitable for screening sensitive and critical materials to be screened, for example powder containing fat or oil.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
EP21184305.7A 2020-07-31 2021-07-07 Dispositif de tamissage Active EP3944904B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020120296.2A DE102020120296B3 (de) 2020-07-31 2020-07-31 Siebvorrichtung

Publications (3)

Publication Number Publication Date
EP3944904A1 true EP3944904A1 (fr) 2022-02-02
EP3944904B1 EP3944904B1 (fr) 2023-06-07
EP3944904C0 EP3944904C0 (fr) 2023-06-07

Family

ID=74565704

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21184305.7A Active EP3944904B1 (fr) 2020-07-31 2021-07-07 Dispositif de tamissage

Country Status (5)

Country Link
EP (1) EP3944904B1 (fr)
DE (1) DE102020120296B3 (fr)
ES (1) ES2952198T3 (fr)
HU (1) HUE062941T2 (fr)
PL (1) PL3944904T3 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE344948C (fr) *
US6003679A (en) 1997-05-07 1999-12-21 Maroscher; Victor William Sieving device with duel independent frequency input
EP1581349B1 (fr) 2002-12-02 2011-06-01 Russell Finex Limited Appareil de tamisage
US20120024764A1 (en) * 2010-01-05 2012-02-02 Iona Krush Multifrequency Sieve Assembly for Circular Vibratory Separator
US9782801B2 (en) * 2015-04-06 2017-10-10 Kason Corporation Vibratory screener with an adapter frame

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE344948C (fr) *
US6003679A (en) 1997-05-07 1999-12-21 Maroscher; Victor William Sieving device with duel independent frequency input
EP1581349B1 (fr) 2002-12-02 2011-06-01 Russell Finex Limited Appareil de tamisage
US20120024764A1 (en) * 2010-01-05 2012-02-02 Iona Krush Multifrequency Sieve Assembly for Circular Vibratory Separator
US9782801B2 (en) * 2015-04-06 2017-10-10 Kason Corporation Vibratory screener with an adapter frame

Also Published As

Publication number Publication date
HUE062941T2 (hu) 2023-12-28
EP3944904B1 (fr) 2023-06-07
DE102020120296B3 (de) 2021-03-04
ES2952198T3 (es) 2023-10-30
EP3944904C0 (fr) 2023-06-07
PL3944904T3 (pl) 2023-11-27

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