EP3090817B1 - Dispositif de separation des gros grains et des grains plus petits - Google Patents

Dispositif de separation des gros grains et des grains plus petits Download PDF

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Publication number
EP3090817B1
EP3090817B1 EP16168079.8A EP16168079A EP3090817B1 EP 3090817 B1 EP3090817 B1 EP 3090817B1 EP 16168079 A EP16168079 A EP 16168079A EP 3090817 B1 EP3090817 B1 EP 3090817B1
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EP
European Patent Office
Prior art keywords
screen
carrier
group
screen rods
rods
Prior art date
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Active
Application number
EP16168079.8A
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German (de)
English (en)
Other versions
EP3090817C0 (fr
EP3090817A1 (fr
Inventor
Gerald Hanisch
Heinz Jank
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Individual
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Publication of EP3090817C0 publication Critical patent/EP3090817C0/fr
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    • 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
    • B07B1/12—Apparatus having only parallel elements
    • B07B1/16—Apparatus having only parallel elements the elements being movable and in other than roller form
    • 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
    • B07B1/12—Apparatus having only parallel elements

Definitions

  • the invention relates to a device for separating coarse grain and smaller grain sizes with a vibrating trough, with a screening section made up of vibration-excitable screen bars that are arranged in a row next to one another at a distance and may fall in the conveying direction of the coarse grain, and which are assigned to a carrier and with a conveying device for the grain, wherein at least two groups of screen bars connected to the support are assigned to the carrier, of which at least one group is mounted such that it can oscillate via a coupling device in such a way that adjacent screen bars assigned to another group can be excited to vibrate parallel to one another with an oscillating drive in the direction through which the screen passes.
  • Devices of this type are associated in particular with crushers or screening sections or the like, which are provided for crushing lumpy input material into smaller grain sizes in the coarse to medium size range. They are used in particular to produce broken minerals from stones or construction waste.
  • a feed unit is arranged upstream of the crusher, into which the crushed material can be fed, for example with an excavator.
  • feed units are usually vibrating conveyors or plate conveyors and separate heavy screens, which form two machines that can be driven separately from one another and have a large overall height and length, which has disadvantages in particular for the transport of such devices.
  • Heavy screens are usually designed as mechanically, electrically, hydraulically or the like. Driven vibrating screens, with which a clean Separation of coarse grain and smaller grain sizes can be achieved, but they are expensive to manufacture, take up a lot of space and must always be supplied with energy, which is why they cause high maintenance costs.
  • a device mentioned at the outset according to the preamble of claim 1 is from WO93/07971 A1 known.
  • the adjacent groups of screen bars are actively excited to vibrate with offset vibrations by means of an eccentric drive and springs.
  • cantilevered screen bars are vibrated at their free ends with a kind of camshaft. In both cases, active vibration drives are provided for adjacent groups.
  • Coarse grain is separated from smaller grain fractions by means of a screen made of screen bars that are spaced apart and fall in the conveying direction of the coarse grain.
  • a screen made of screen bars that are spaced apart and fall in the conveying direction of the coarse grain.
  • two rows of screen bars are arranged one above the other, but offset from one another.
  • the screen bars are clamped in a support on one side and are made to vibrate by the material to be screened.
  • the coarse grain is guided over the screen in the direction of the longitudinal axes of the screen bars and the fine grain trickles through the screen at right angles to it.
  • the screen bars are only set into vibrations required for a good screening process by the screening material in those areas of the screen in which a sufficient quantity of screening material is guided over the screen, whereas the screen bars in the other areas are hardly excited to vibrate and thus with such a device only a poor screening effect can be achieved.
  • the rod-shaped support to mount its longitudinal axis running transversely to the screen bars in a torsionally resilient manner in a frame and to arrange the screen bars in at least two consecutive rows in the conveying direction of the coarse grain.
  • the invention is therefore based on the object of specifying a device of the type described at the outset, which combines the advantages of a screening section integrated in a vibrating channel and a separately drivable heavy screen downstream of a vibrating channel, i.e. providing good screening results with a reduced size.
  • the invention solves the task in that one group is directly coupled to the carrier and the other group is indirectly connected to the carrier via a coupling device and that the vibration drive is formed by the conveying device.
  • a device of the type described at the outset which combines the advantages of a screening section integrated in a vibrating channel with those of a separately drivable heavy screen downstream of a vibrating channel, ie it delivers good screening results with a reduced size.
  • the measures according to the invention result in relative movements between adjacent screen bars, which relative movements loosen the material to be screened, loosen parts adhering to grains, promote the transport of smaller grain sizes through the screen, i.e. screening, and thereby increase the efficiency of the device. In addition, this prevents the formation of clogged grain blocking the screen.
  • the screen bars can also be formed by profiles which are optionally formed in a wavy manner in the respective support plane of the screen bars.
  • Two or more groups of screen bars are associated with the carrier, each group of which forms a screen deck separately connected to the carrier.
  • Particularly simple and robust structural conditions result for such devices, for example associated with a crusher, in that one group is coupled directly to the carrier, i.e. is practically fixed to the carrier, and the other group is connected indirectly to the carrier via a coupling device.
  • the moveable screen deck is mounted on one or both sides via springs on the carrier, so that during operation a vibration amplitude of up to 30mm can be achieved between the adjacent screen bars.
  • the screen deck bearing can be designed in such a way that the screen bars can perform a torsional vibration, a parallel displacement or a combination of both movements in relation to the adjacent screen bars.
  • vibration-excited screen bars move parallel to one another in the direction through which the screen passes.
  • the type of suspension will be chosen depending on the application.
  • steel springs, rubber springs, rubber-metal buffers, spring-damper systems are used, with the transfer function of the spring-damper device preferably being adjustable.
  • the spring characteristic or the transfer function of the spring damper device is preferably chosen to be very progressive in order to limit the amplitude at higher frequencies.
  • the relative movement between the floors should be negligible.
  • the relative movements initially increase sharply, after which they should be kept as constant as possible in the upper frequency range.
  • neighboring screen bars vibrate with the same frequency, since they are vibrated by one and the same vibratory drive, but out of phase.
  • the more immovable group in particular one rigidly connected to the carrier, can consist of standing flat steel and the other group of screen bars with a T-profile cross-section, or with tapered or wavy-shaped profiles in the direction of passage through the screen.
  • a separate vibrating drive can be provided for the screen bars that can be moved relative to one another in the direction through which the screen passes.
  • an eccentric or unbalanced drive assigned to the group can be provided, which, however, can be significantly smaller than with known drives and which is preferably also installed on the vibrating channel like the conveyor device.
  • the vibration drive is formed by the conveying device and no additional drive is required, and the screen deck vibrates with the vibrating channel. When excited by the vibratory drive, neighboring screen bars then vibrate with different amplitudes and phase shifts.
  • the conveyor device can be a linear conveyor, in particular an unbalanced drive.
  • the bearing distances of the screen decks and the initial inclination of the screen decks can be adjusted relative to one another with an adjustment device.
  • a solid profile for example a square steel profile, can be doubled at least on the rigid screen bars. Adjacent sieve bars are preferably assigned to different support levels in the idle state.
  • the screening section can consist of several individual cascades of groups of screening bars arranged one behind the other in the conveying direction.
  • the device for separating coarse grain and smaller grain sizes comprises a vibrating chute 1, i.e. a chute with a conveying device for the grain fed into the chute and a screening section 2 made up of screen bars 4 which are arranged at a distance next to one another and are aligned in the conveying direction 3 of the coarse grain and thereby descending, vibration-excitable screening bars 4, 4', which are assigned to a carrier 5.
  • a vibrating chute i.e. a chute with a conveying device for the grain fed into the chute and a screening section 2 made up of screen bars 4 which are arranged at a distance next to one another and are aligned in the conveying direction 3 of the coarse grain and thereby descending, vibration-excitable screening bars 4, 4', which are assigned to a carrier 5.
  • Two groups of sieve bars 4, 4' connected to the carrier 5 are assigned to the carrier 5, one group of which is mounted via a coupling device 9 so that it can swing relative to the carrier 5 in such a way that adjacent sieve bars 4 , 4' can be excited to vibrate parallel to one another with an oscillating drive 7 in the sieve passage direction 8.
  • two groups of screen bars 4, 4' are assigned to the carrier 5, one group of which forms a screen deck connected to the carrier via a separate coupling device.
  • the screen decks have different natural vibration frequencies, with the result that the screen bars 4, 4' of the two screen decks mesh against one another during operation.
  • the Carrier assigned to two groups of screen bars one group being coupled directly to the carrier, i.e. vibrating directly with the structural unit made up of vibrating channel 1 and screen deck, and the other group being indirectly connected to carrier 5 via a coupling device 9, a spring-damper element and resonates.
  • the vibratory drive 7 is formed by the conveying device, the conveying device being a linear conveyor, namely an unbalanced drive. Due to the fact that the screen bars 4, 4' have a T-shaped cross section, the distance a between adjacent screen bars increases in the screen passage direction 8.
  • the screen deck bearing can be designed in such a way that the screen bars undergo torsional vibration, parallel displacement or a combination of both movements ( figure 5 ) can run against the neighboring screen bars.
  • the oscillatable group of screen bars 4 is mounted on the carrier 5 via the associated coupling device 9 in such a way that the 7 right-hand bearing essentially allows torsional vibrations and suppresses or greatly dampens linear vibrations.
  • the left bearing on the other hand, essentially oscillates around a circular path whose center point is in the area of the right bearing axis and whose radius corresponds to the distance between the left and right bearing.

Landscapes

  • Combined Means For Separation Of Solids (AREA)

Claims (8)

  1. Dispositif pour séparer des gros grains et des grains de plus petite taille, comprenant un canal vibrant (1), présentant une ligne de criblage (2) constituée de barres de criblage (4, 4') qui peuvent être excitées par l'intermédiaire de vibrations, qui sont agencées les unes à côté des autres à une certaine distance, qui sont orientées dans la direction de transport (3, F) des gros grains et qui sont associées à un support (5) et à un dispositif de transport de grains, support (5) auquel sont associés au moins deux groupes de barres de criblage (4, 4') reliés au support (5), dont au moins un groupe relié par un dispositif de couplage (9) est monté de manière à pouvoir osciller de telle sorte que des barres de criblage respectivement voisines (4, 4'), associées à un autre groupe, puissent être excitées en oscillation parallèlement les unes aux autres dans la direction de passage de crible (8) par l'intermédiaire d'un entraînement oscillant (7), caractérisé en ce que l'un des groupes est directement relié au support (5) alors que l'autre groupe est relié indirectement au support (5) par l'intermédiaire d'un dispositif de couplage (9), et en ce que l'entraînement oscillant (7) est constitué par le dispositif de transport.
  2. Dispositif selon la revendication 1, caractérisé en ce que le dispositif de transport est un transporteur linéaire, en particulier un entraînement à balourd.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la distance (a) entre des barres de criblage respectivement voisines (4, 4') augmente dans le sens de passage de crible (8).
  4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la distance entre des barres de criblage respectivement voisines (4, 4') augmente dans la direction de transport (3, F).
  5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les barres de criblage (4, 4') sont constituées de profils, en particulier de profils en T, qui sont optionnellement ondulés dans le plan de support (E1, E2) des barres de criblage.
  6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que des barres de criblage respectivement voisines (4, 4') sont associées à des plans de support différents (E1, E2) à l'état de repos.
  7. Dispositif selon l'une quelconque des revendications 2 à 6, caractérisé en ce que le dispositif de couplage (9) d'au moins un des groupes de barres de criblage (4, 4') est constitué d'un dispositif amortisseur à ressort en prise sur le support (5), dont la fonction de transmission est de préférence réglable.
  8. Dispositif selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la ligne de criblage est constituée de plusieurs cascades individuelles de groupes de barres de criblage (4, 4') qui sont disposées les unes derrière les autres dans la direction de transport (3, F).
EP16168079.8A 2015-05-06 2016-05-03 Dispositif de separation des gros grains et des grains plus petits Active EP3090817B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA50367/2015A AT516406B1 (de) 2015-05-06 2015-05-06 Vorrichtung zum Trennen von Grobkorn von kleineren Korngrößen

Publications (3)

Publication Number Publication Date
EP3090817A1 EP3090817A1 (fr) 2016-11-09
EP3090817C0 EP3090817C0 (fr) 2023-06-28
EP3090817B1 true EP3090817B1 (fr) 2023-06-28

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Family Applications (1)

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EP16168079.8A Active EP3090817B1 (fr) 2015-05-06 2016-05-03 Dispositif de separation des gros grains et des grains plus petits

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EP (1) EP3090817B1 (fr)
AT (1) AT516406B1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108505942A (zh) * 2018-03-13 2018-09-07 西南石油大学 一种单激励钻井振动装置和间歇式单激励钻井振动装置
CN112024394A (zh) * 2020-06-29 2020-12-04 安徽科技学院 一种油菜籽自动筛选机控制系统
CN113305007B (zh) * 2021-06-09 2022-09-06 宝鸡周原贡品农业科技有限公司 一种面粉结块筛选去除的装置
CN114985242B (zh) * 2022-05-28 2023-05-02 中国热带农业科学院农业机械研究所 一种全自动菠萝种苗选取种植装置
CN116441153B (zh) * 2023-06-13 2023-08-22 中国云南路建集团股份公司 一种市政施工用砂石筛分设备
CN117339872B (zh) * 2023-11-16 2025-12-26 温州市通洲环保设备有限公司 一种防堵式振动筛

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3105815A (en) * 1961-03-27 1963-10-01 Simplicity Eng Co Vibratory feeder
DE3834381A1 (de) * 1988-10-10 1990-04-12 Gronholz Claus Vorrichtung zum zerkleinern und aufbereiten von grosskoernigem material
US5368167A (en) * 1991-10-22 1994-11-29 Edem Steel Ltd. Vibrating conveyor screening method and apparatus
FR2714315B1 (fr) * 1993-12-27 1996-03-01 Gen Dechets Recyclabl Centre Dispositif de tri dimensionnel de déchets.
DE19944182B4 (de) * 1998-09-19 2009-09-10 Helmut Gegenheimer Schleifmittelkorn-Siebvorrichtung
AT411577B (de) * 2002-09-19 2004-03-25 Hmh Engineering Consulting Tra Vorrichtung zum trennen von grobkorn und feinkorn

Also Published As

Publication number Publication date
EP3090817C0 (fr) 2023-06-28
EP3090817A1 (fr) 2016-11-09
AT516406B1 (de) 2016-05-15
AT516406A4 (de) 2016-05-15

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