EP0955101A2 - Dispositif de tamisage - Google Patents

Dispositif de tamisage Download PDF

Info

Publication number
EP0955101A2
EP0955101A2 EP99108452A EP99108452A EP0955101A2 EP 0955101 A2 EP0955101 A2 EP 0955101A2 EP 99108452 A EP99108452 A EP 99108452A EP 99108452 A EP99108452 A EP 99108452A EP 0955101 A2 EP0955101 A2 EP 0955101A2
Authority
EP
European Patent Office
Prior art keywords
screen
screening device
auxiliary
beater mechanism
main
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
EP99108452A
Other languages
German (de)
English (en)
Other versions
EP0955101B1 (fr
EP0955101A3 (fr
Inventor
Wolfhard Rumpf
Heinrich Nordmann
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.)
Reimelt Dietrich KG
Original Assignee
Reimelt Dietrich KG
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 Reimelt Dietrich KG filed Critical Reimelt Dietrich KG
Publication of EP0955101A2 publication Critical patent/EP0955101A2/fr
Publication of EP0955101A3 publication Critical patent/EP0955101A3/fr
Application granted granted Critical
Publication of EP0955101B1 publication Critical patent/EP0955101B1/fr
Anticipated expiration legal-status Critical
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
    • B07B1/22—Revolving drums
    • B07B1/24—Revolving drums with fixed or moving interior agitators
    • 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
    • B07B1/20—Stationary drums with moving interior agitators

Definitions

  • the invention relates to a sieve device with a main sieve and a movable preliminary sieve, which is connected to a main racket interacting with the main sieve.
  • a sieve device of the type mentioned is known from US 4 202 759.
  • a pre-screen is used to protect the main screen.
  • the main racket mechanism is attached to this pre-screen, so that when the Pre-sieve not only produces a movement of the bulk material relative to the pre-sieve, but also promotes the bulk material that has passed through the pre-sieve relative to the main sieve. Coarse parts that remain in the pre-screen basket may have to be removed from the pre-screen basket by hand.
  • sieving with this sieving device is problematic, for example when the bulk material tends to clump or interlock. In this case it can be observed that the prescreen clogs relatively quickly and the operation of the screening device has to be interrupted for cleaning.
  • a stationary part is penetrated by a screw conveyor, while a rotating part is connected to it, on the outside of which the main racket mechanism is attached.
  • the material to be screened is thus permanently conveyed over the fixed part of the pre-screen. Due to the limited length, the screening capacity of this screening device is also limited. In addition, the screenings are heavily used due to the high relative speed. Sensitive parts such as gummy bears would be destroyed.
  • the invention has for its object to provide a screening device that works satisfactorily even with problematic screenings.
  • auxiliary beater works with the moving pre-screen and a Drive for generating a relative movement between auxiliary beater and pre-screen is provided.
  • This construction retains the advantages that one had with a main racket mechanism that can be moved together with the pre-screen, and additionally has the advantage that the pre-screen is now also provided with a racket system.
  • this beater which performs a relative movement to the pre-screen, the product to be screened is gently and slowly conveyed over the pre-screen, so that screenings that tend to clump or become blocked can be conveyed through the pre-screen at a relatively high throughput rate. Fine parts of the product that have passed through the pre-screen are also transported through the main racket through the main screen. Goods to be screened will of course be removed. Basically, two movements overlap here. On the one hand, the pre-screen moves in relation to the main screen.
  • the auxiliary racket moves with respect to the moving pre-screen or the pre-screen with respect to the auxiliary racket.
  • the auxiliary racket mechanism can act on the pre-screen over the entire length. This makes it possible to support the main racket mechanism over the entire length on the pre-screen, which enables increased stability, and still avoid product batches over the entire length of the pre-screen. Large, sensitive products are also carefully removed from the pre-screen.
  • the auxiliary beater mechanism is preferably designed as a discharge device.
  • the auxiliary beater mechanism therefore conveys the product, ie the material to be sieved, not only simply over the surface of the pre-screen, but also into one certain direction, namely towards the coarse material outlet, so that the throughput can be increased further.
  • both the main screen and the pre-screen are designed as cylinder screens and the pre-screen and the auxiliary beater mechanism rotate at different speeds.
  • a relative movement of the material to be screened can be achieved simply by rotating either the cylinder or the corresponding beater mechanism.
  • the main screen will be kept stationary, and the main racket will graze along the inner wall of the main screen, possibly at a small distance. So that there is now a relative movement between the auxiliary racket and the pre-screen, it is only necessary to let these two parts rotate at different speeds. Such different speeds can be set relatively easily.
  • the auxiliary beater mechanism is preferably rotatably mounted in a drive shaft of the pre-screen. This solves the problem of supporting the auxiliary racket in a relatively simple manner.
  • the drive shaft for the pre-screen must be guided to the pre-screen anyway so that torque transmission is possible.
  • the drive shaft has a sufficient diameter so that there is sufficient space for storing the auxiliary racket.
  • an auxiliary shaft is guided through the drive shaft as the drive for the auxiliary racket mechanism. You can then use both the pre-screen with the main racket and the auxiliary racket drive from the same side. This has the advantage that the other side, which is drive-free, is easily accessible, for example for maintenance purposes.
  • the drive shaft and the auxiliary shaft preferably have drive wheels which are arranged next to one another and are connected to the same drive motor.
  • the auxiliary shaft extends completely through the drive shaft so that it is accessible on the side facing away from the preliminary screen.
  • a drive wheel for the auxiliary racket so close to a drive wheel for the pre-screen and the main racket that both drive wheels can be connected to the same drive motor without major problems. So you get by with a single drive motor, so that the additional effort that has to be done for the auxiliary racket remains limited.
  • the connection between the drive wheels and the drive motor can be made in many ways. For example, V-belts, timing belts, chains or gears can be used. You can also stop the auxiliary racket if necessary, i.e. drive it at zero speed. When the pre-screen moves, there is still a relative movement between the pre-screen and the auxiliary beater.
  • the drive wheels advantageously have different effective diameters.
  • the different speeds of the pre-screen and auxiliary racket are then set via the difference in diameter. This has the advantage that the output shaft of the drive motor does not have to be modified practically. There you can use the same driven wheels.
  • the auxiliary beater mechanism is advantageously designed as a screw conveyor. It not only moves the material to be conveyed in the circumferential direction over the inside of the pre-screen, but also in the axial direction. This ensures that the parts of the screened material that cannot pass through the pre-screen can be conveyed out of the coarse material outlet.
  • the conveyor screw advantageously has a lower delivery rate than a feed screw from an inlet to the inlet of the pre-screen. This takes into account the fact that a certain proportion of the material to be screened should pass through the pre-screen. This can be achieved in a simple manner in that the conveyor screw has a lower delivery rate despite a higher speed, for example when the screen basket itself rotates at a high speed at which the conveyor screw also rotates, but the speed difference between the screen and auxiliary beater mechanism is kept much smaller.
  • the pitch of the screw can also be less.
  • the screw conveyor has a single helix while the feed screw has a double or multiple helix.
  • the auxiliary beater mechanism is advantageously traversed lengthways by an air duct which, based on a screenable material space, opens into a washing chamber within bearings.
  • air duct Through the air duct, air with a certain pressure can be conveyed continuously or in sections, which then builds up a sealing air barrier in front of the sealing rings with which the bearings are to be protected from product.
  • Product approach is avoided. Any product approach that has already been formed will be restored removed so that the seals and bearings have a relatively long life.
  • the air is transported into the axially inside through the auxiliary racket, so that complicated wiring in moving parts can be avoided.
  • the prescreen is preferably divided in the longitudinal direction.
  • the advantages of a divided pre-screen as known for example from DE 43 31 782 C1, are combined with the advantages of a moving pre-screen with a relative movement between the auxiliary beater mechanism and the pre-screen.
  • a part of the pre-screen preferably surrounds the feed screw and this part is arranged in a stationary manner.
  • This part of the pre-screen can therefore be non-rotatably mounted in the housing. It is penetrated by the feed screw. Accordingly, the feed screw can convey the screen well over this part of the pre-screen, which mainly means a longitudinal movement. In addition, a small rotary part of the movement is also included. This movement is then followed by the pre-screening in the second part, which is supported by the auxiliary beater mechanism moved relative to the pre-screen.
  • a screening device 1 has a stationary main screen 2, which is designed as a cylindrical screen.
  • the main screen 2 is tensioned with aids, not shown, both in the axial direction and in the radial direction. Screening material which passes through the main screen 2 falls into a fine material outlet 3, from where it can be removed.
  • the material to be screened is fed to an inlet housing 4 shown in dashed lines.
  • a feed screw 5, which has a double helix 6, is arranged in the inlet housing 4.
  • the double helix 6 is arranged on a shaft 7, which is rotatably mounted in a bearing 8, which is also only shown in broken lines. It extends through the housing 4 and protrudes from the housing 4 with a stub shaft 9.
  • a drive wheel 10 is rotatably arranged, which is connected via a V-belt 11 to an output wheel 12, which is arranged on a drive shaft 13 of a motor 14.
  • the feed screw 5 rotates and conveys material to be sieved from the inlet housing 4 through a feed channel 15 up to a rotationally fixed connection with the feed screw 5, which essentially corresponds to the moving pre-screen 16 according to FIG. 1, ie in this part 16a the feed screw 18 rotates, which in turn has a different speed than the feed screw 5.
  • This part 16a of the pre-screen is connected to the feed screw 5 via a connection 40 .
  • the pre-screen has a second part 16b which is fixed in the housing 4. This part 16b is penetrated by the feed screw 5. The feed screw 5 thus produces a relative movement with respect to this stationary part 16b of the pre-screen.
  • the material to be screened is first conveyed over the part 16b of the pre-screen, with the help of the feed screw 5. Then the screened material comes into the other part 16a of the pre-screen and is there with the help of the screw conveyor 8, which is a relative movement to the part 16a of the Pre-screen, driven by the pre-screen.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
EP99108452A 1998-05-04 1999-04-30 Dispositif de tamisage Expired - Lifetime EP0955101B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19819866A DE19819866C1 (de) 1998-05-04 1998-05-04 Siebeinrichtung
DE19819866 1998-05-04

Publications (3)

Publication Number Publication Date
EP0955101A2 true EP0955101A2 (fr) 1999-11-10
EP0955101A3 EP0955101A3 (fr) 2000-08-02
EP0955101B1 EP0955101B1 (fr) 2003-11-26

Family

ID=7866626

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99108452A Expired - Lifetime EP0955101B1 (fr) 1998-05-04 1999-04-30 Dispositif de tamisage

Country Status (2)

Country Link
EP (1) EP0955101B1 (fr)
DE (2) DE19819866C1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102688795A (zh) * 2012-06-05 2012-09-26 张永胜 高效湿法整粒机
CN102764729A (zh) * 2012-07-16 2012-11-07 江阴市龙昌机械制造有限公司 一种快拆式旋转筛粉机
CN103447240A (zh) * 2012-06-01 2013-12-18 株式会社佐竹 异物分选机
WO2021078158A1 (fr) * 2019-10-24 2021-04-29 安徽省环境科学研究院 Suspension d'amidon à économie d'eau performante et tamis de séparation de résidus et procédé de séparation

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2503233A (en) * 2012-06-19 2013-12-25 Kek Gardner Ltd Centrifugal sifting apparatus
CN103008243B (zh) * 2012-11-16 2016-03-30 云南钛业股份有限公司 一种丸料筛分装置
DK178512B1 (en) * 2014-11-25 2016-04-25 Jetek Rådgivende Maskiningeniør Aps Apparatus and use thereof for separating fibre material
CN104438042A (zh) * 2014-11-29 2015-03-25 肖金坚 一种物料筛分装置
CN105618365A (zh) * 2016-03-24 2016-06-01 宁波开诚生态技术有限公司 除杂分离机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE30775C (de) * R. ZIEGER in Berlin Auslaufcylinder in Sichtmaschinen mit innerem Vorcylinder (abhänging vom Patente Nr. 6402.)
DE37093C (de) * A. STEIGER in Manchester, England Vertheilungs- und Speisevorrichtung bei Sichtemaschinen mit zwei in einander angeordneten Mänteln
US4202759A (en) * 1978-11-24 1980-05-13 Prater Industries, Inc. Centrifugal screening apparatus
DE4331782C1 (de) * 1993-09-18 1994-08-18 Reimelt Dietrich Kg Siebeinrichtung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103447240A (zh) * 2012-06-01 2013-12-18 株式会社佐竹 异物分选机
CN102688795A (zh) * 2012-06-05 2012-09-26 张永胜 高效湿法整粒机
CN102764729A (zh) * 2012-07-16 2012-11-07 江阴市龙昌机械制造有限公司 一种快拆式旋转筛粉机
WO2021078158A1 (fr) * 2019-10-24 2021-04-29 安徽省环境科学研究院 Suspension d'amidon à économie d'eau performante et tamis de séparation de résidus et procédé de séparation
US11311910B2 (en) 2019-10-24 2022-04-26 Anhui Academy of Environmental Science Research High-efficiency water-saving separation screen for starch slurry and residue and separation method

Also Published As

Publication number Publication date
EP0955101B1 (fr) 2003-11-26
DE59907833D1 (de) 2004-01-08
EP0955101A3 (fr) 2000-08-02
DE19819866C1 (de) 1999-04-15

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