EP4464426A1 - Grille à rouleaux - Google Patents

Grille à rouleaux Download PDF

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Publication number
EP4464426A1
EP4464426A1 EP24174028.1A EP24174028A EP4464426A1 EP 4464426 A1 EP4464426 A1 EP 4464426A1 EP 24174028 A EP24174028 A EP 24174028A EP 4464426 A1 EP4464426 A1 EP 4464426A1
Authority
EP
European Patent Office
Prior art keywords
shaped metal
flat iron
classifying
metal bodies
roller grate
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.)
Pending
Application number
EP24174028.1A
Other languages
German (de)
English (en)
Inventor
Bruno Götz
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.)
Cpc Crushing Processing GmbH
Original Assignee
Cpc Crushing Processing 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 Cpc Crushing Processing GmbH filed Critical Cpc Crushing Processing GmbH
Publication of EP4464426A1 publication Critical patent/EP4464426A1/fr
Pending 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
    • B07B1/12—Apparatus having only parallel elements
    • B07B1/14—Roller screens
    • B07B1/15—Roller screens using corrugated, grooved or ribbed rollers
    • 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
    • B07B1/52—Cleaning with brushes or scrapers
    • B07B1/526—Cleaning with brushes or scrapers with scrapers

Definitions

  • the present invention relates to a roller grate for fine screening.
  • roller grates for classifying for example, rock debris have already become known.
  • the roller grates known from the prior art comprise a machine frame with a large number of screening shafts equipped with classifying discs and spacer elements, which are usually arranged one behind the other in the longitudinal direction of the machine frame and are rotatably mounted relative to the machine frame.
  • Each screening shaft has a support device arranged in a fixed position relative to the respective screening shaft, to which at least one stripping device is attached.
  • the stripping devices serve to keep the gap formed between two adjacent classifying discs free of adhesions of the screening material and thus prevent the gaps necessary for the function of the roller grate from becoming blocked.
  • the stripping devices are usually made of a metal material in the form of a sheet, with the surface plane of the metal sheet forming the stripping device usually extending parallel to the longitudinal axis of the screen shafts and thus orthogonal to the transport direction of the roller grate.
  • the surface plane of the stripping devices also runs orthogonal to the surface planes of the classifying disks.
  • stripping devices viewed in the circumferential direction of the rotating screen shafts, have low rigidity or low bending stiffness, such that the aforementioned stripping devices wear out quickly. If wear occurs, the previously known stripping devices can only be replaced with completely new stripping devices. In the prior art, even if only a small amount of wear occurs, the stripping device must be completely replaced to restore the stripping function.
  • stripping devices known from the prior art are only made of sheet metal. Due to the resulting reduced Due to the section modulus of the stripping elements, it is not possible to make the gap as small as desired, as this would lead to a further weakening of the intended stripping elements.
  • the object of the present invention is to provide an improved roller grate for the fine screening of material, which in particular has an increased service life of the individual elements and in which the maintainability and revisability are also significantly improved.
  • the roller grate according to the invention comprises a machine frame with a plurality of screen shafts equipped with classifying disks and spacer elements, which are arranged one behind the other in the longitudinal direction of the machine frame and are rotatably mounted relative to the machine frame.
  • Each screen shaft is assigned a support device, which is arranged below the respective screen shaft and to which at least one stripping device is attached.
  • the at least one stripping device is formed by a plurality of flat iron-shaped metal bodies, wherein a flat iron-shaped metal body is assigned to each gap formed between two adjacent classifying disks by the spacer element, and wherein the flat iron-shaped metal bodies are designed to stand upright and extend from the respective support device into the gaps of the screen shafts formed by adjacent classifying disks.
  • the longitudinal axes of the screen shafts extend between the two opposite longitudinal sides of the machine frame and are thus preferably aligned orthogonally to the longitudinal direction of the machine frame, and thus in the transverse direction of the machine frame.
  • the planes of the classifying discs are in the longitudinal direction of the machine frame, the multitude of classifying discs arranged on a screen shaft in a rotationally fixed manner are each arranged at a defined distance from one another by means of spacer elements in order to form a gap between the adjacent classifying discs.
  • the planes of the classifying discs arranged on the screen shafts in a rotationally fixed manner run parallel to the surface planes of the flat iron-shaped metal bodies.
  • the surface planes of the flat iron-shaped metal bodies run in the longitudinal direction of the machine frame.
  • the flat iron-shaped metal bodies keep the gaps required for screening free.
  • the transport direction of the roller grate extends essentially orthogonal to the longitudinal axes of the screen shafts in their direction of rotation.
  • the screening plane of the roller grate is formed by the fictitious plane which connects the longitudinal axes of the screen shafts.
  • the screening shafts and consequently the classifying discs arranged in a rotationally fixed manner relative to the screening shafts can be driven by chains, bevel gears or individually, whereby the speed of the screening shafts is usually constant. However, it can also be provided that the screening shafts are driven at different speeds.
  • the screening shafts can be designed to be horizontal or inclined in the longitudinal direction of the machine frame and thus to rise and/or fall in the transport direction.
  • a flat iron-shaped metal body can, for example, be a piece of metal rolled into a bar. In particular, it can be a flat steel.
  • the metal bodies in flat iron form, which are used according to the invention, can, however, also be produced as a cast or forged part or by a similar process.
  • a flat iron-shaped metal body is designed as a strip-shaped metal body and has an upper side and a lower side, which have two opposite longitudinal edges and two mutually opposite front edges are connected, whereby the height of the edges defines the respective thickness of the flat iron-shaped metal body. With the same edge height all around, a flat iron-shaped metal body with a constant thickness is obtained.
  • the long edges extend in the longitudinal direction of the flat iron-shaped metal body and the front edges in the transverse direction of the flat iron-shaped metal body.
  • the edge height in the longitudinal and/or transverse direction of the flat iron-shaped metal body flat iron-shaped metal bodies with different thicknesses can be produced.
  • the surface plane of the flat iron-shaped metal body lies in the plane with the largest surface extension of the flat iron-shaped metal body and is usually located as a middle plane between the top and bottom of the metal body.
  • the roller grates according to the invention form gap spaces in the sieve plane for screening the material, which are defined by a gap width or a transverse gap and a gap length or a longitudinal gap.
  • the transverse gaps are the gaps that run transversely to the conveyor device of the roller grate and define the gap width of the gap spaces.
  • the gap width is defined by the distance between two adjacent classifying disks on the respective sieve shaft.
  • the longitudinal gaps of the roller grate are the gaps that run longitudinally to the conveyor device of the roller grate and are formed by the distances between the peripheral surfaces of classifying disks that follow one another in the transport direction.
  • classifying disks and spacer elements are arranged alternately on the sieve shafts along the longitudinal axis of the sieve shafts.
  • the spacer elements can be circular ring-shaped cylinders whose inner diameter is adapted to the dimensions of the sieve shaft.
  • the spacer elements which have a circular-cylindrical outer shape, can also be driven via the screen shaft and for this purpose can be connected to the screen shaft in a form-fitting and/or force-fitting manner.
  • the dimension of the spacer elements in the direction of the longitudinal axis of the screen shafts determines the distance between two adjacent classifying disks and thus the gap width.
  • the at least one carrier device can be arranged in a stationary manner relative to the machine frame or is preferably connected to the machine frame or fastened thereto, in particular screwed, in order to determine the position and orientation of the carrier device.
  • the surface planes of the flat iron-shaped metal bodies can be arranged essentially parallel to the disc planes of the classifying discs.
  • the at least one stripping device can be arranged on the support device in a height-adjustable and adjustable manner in order to adjust the distance between the flat iron-shaped metal bodies and the screen shafts.
  • the height-adjustability and adjustability of the stripping devices make it possible to compensate for the wear and tear of the stripping devices and in particular of the flat iron-shaped metal bodies that occurs during use, without the stripping devices having to be completely replaced.
  • a plurality of adjacent flat iron-shaped metal bodies are combined to form a group that forms a stripping device, wherein the flat iron-shaped metal bodies that form the stripping device are connected to one another via a cross element and are arranged on a support device so that they can be adjusted in height.
  • Combining a plurality of adjacent flat iron-shaped metal bodies to form a group that forms a stripping device has the advantage that groups of flat irons can be formed that have a weight that is easy to handle during maintenance and/or in particular when replacing the stripping device.
  • the grouping also has the advantage that different levels of wear of the at least one stripping device along the longitudinal axis of the screen shafts can be better counteracted by adjusting or replacing the flat iron-shaped metal bodies that are combined in groups.
  • the stripping devices formed from the groups of flat iron-shaped metal bodies are designed in the longitudinal direction of the screen shaft with a width of 40 to 50 cm.
  • the at least one stripping device is fastened to a support device in a height-adjustable manner via two clamping devices arranged at a distance in the transverse direction of the machine frame, wherein the clamping devices are preferably each detachably fastened to the support device, whereby the stripping device can be clamped between the clamping device and the support device in order to determine its height bearing.
  • the clamping device can have a clamping plate which is fastened to a carrier device via at least one screw element, wherein the distance of the clamping plate to the carrier device can be fixed via the at least one screw element.
  • the clamping plate can be designed such that it rests on at least one longitudinal side of a flat iron-shaped metal body and presses at least one opposite longitudinal side of at least one flat iron-shaped body against the carrier device.
  • the flat iron-shaped metal bodies are arranged inclined in the transport direction, wherein the longitudinal axis of the flat iron-shaped metal bodies forms an angle in the range of 15° to 90° with the tangent of the peripheral surface of the spacer elements.
  • the classifying discs can be designed in the form of a disc with a variable radius around its circumference.
  • the classifying discs are designed, for example, in the form of elliptical discs, polygonal discs, polygonal discs or similar disc shapes.
  • the stroke of the elliptical disk and thus the difference between the minimum and maximum radius of the elliptical disk has a value in the range of 40 to 50 mm.
  • the gap width of the gap between two adjacent classifying discs of the screening shafts can be selected to be less than 40 mm, particularly preferably to be less than 30 mm, for example 25 or 20 mm.
  • the flat iron-shaped metal bodies are preferably made of a rust-proof stainless steel, in particular of a stainless steel alloy.
  • the flat iron-shaped metal bodies can be made of a chromium steel, such as in particular a martensitic stainless chromium steel and in particular a razor blade steel.
  • a razor blade steel for example, is a martensitic stainless chromium steel, such as that available on the market from the company Sandvik under the designation 13C26.
  • the metal material forming the flat iron-shaped metal bodies can be subjected to material hardening at least in some areas.
  • the flat iron-shaped metal bodies can be subjected to boronizing at least in some areas.
  • the roller grate 1 comprises a machine frame 2 formed by two metal plates lying opposite one another.
  • the longitudinal axis of the machine frame 2 is marked in the drawing with the double arrow 23 and the transverse direction of the machine frame with the double arrow 25.
  • the embodiment of the roller grate 1 according to the invention has eight screen shafts 3 arranged along the longitudinal direction 23 of the machine frame 2.
  • the eight screen shafts 3 are arranged one behind the other in the longitudinal direction 23 of the machine frame 2 and are rotatably mounted relative to the machine frame 2.
  • the screen shafts 3 are driven by a drive device 9 powered, the Figure 1 shows the example of a drive device 9 in the form of an electric motor driven by a gearbox.
  • the Fig. 2 shows, for simplified representation, a single screen shaft 3 with an associated carrier device 5, which is arranged below the screen shaft 3 and to which four stripping devices 7 are attached.
  • a plurality of classifying discs 31 and spacer elements 33 are arranged alternately on the screen shaft 3, wherein the planes 311 of the classifying discs 31 extend orthogonally to the longitudinal axis 37 of the screen shaft 3.
  • a spacer element 33 is arranged to form a defined gap space 35.
  • the dimension of the spacer element 33 in the direction of the longitudinal axis 37 of the screen shaft 3 defines the resulting gap width or the transverse gap of the roller grate 1.
  • the peripheral surfaces 312 of the classifying disks 31 are visible, whereby the different distances between the peripheral surfaces 312 of the different classifying disks 31 result from the different positions of the classifying disks 31 relative to the screen shaft 3.
  • the plurality of classifying disks 31 are arranged offset from one another in a rotationally fixed manner relative to the screen shaft 3, as can also be seen from the sectional view in the Fig. 3 can be removed.
  • the stripping devices 7 are formed by a plurality of flat iron-shaped metal bodies 71.
  • Four stripping devices 7 are formed over the entire width of the screen shaft 3 shown along its longitudinal axis 37.
  • a flat iron-shaped metal body 71 is arranged in each gap 35 formed between two adjacent classifying disks 31, the flat iron-shaped metal bodies 71 extending upright from the carrier device 5 into the gap 35 of the screen shaft 3 formed by adjacent classifying disks 31.
  • the surface planes extend the flat iron-shaped metal body essentially parallel to the disc planes of the classifying discs 31.
  • the stripping devices 7 are arranged on the support device 5 in a height-adjustable and adjustable manner such that the distance between the flat iron-shaped metal bodies 71 and the screen shafts 3 is adjustable.
  • ten adjacent flat iron-shaped metal bodies 71 are each combined to form a stripping device 7, wherein the flat iron-shaped metal bodies 71 of the group are connected to one another via a cross element 72 and are arranged together so as to be height-adjustable on the carrier device 5.
  • the stripping devices 7 are attached so as to be height-adjustable to the carrier device 5 via two clamping devices 73 arranged at a distance in the transverse direction 25 of the machine frame 2.
  • the clamping devices 73 are detachably attached to the carrier device 5 via screw elements 733, whereby the stripping devices 7 are adjustable between the clamping device 73 and the carrier device 5 in order to determine the height of the stripping device 7 or the distance of the flat iron-shaped metal bodies 71 relative to the screen shaft 3 or relative to the surfaces of the spacer elements 33.
  • the clamping device 73 has a clamping plate 731 which is fastened to the carrier device 5 via two screw elements 733, wherein the distance of the clamping plate 731 to the carrier device 5 can be fixed via the two screw elements 733.
  • the stripping devices 7 each have two countered machine screws 53, which are fastened to the support device 5 and via which the height of the stripping device 7 can be adjusted.
  • the Fig. 3 shows a sectional view of the exemplary embodiment of the roller grate 1 according to the invention according to Fig. 1 .
  • the roller grate 1 according to the invention has a number of eight screening shafts 3 arranged in the longitudinal direction 23 of the machine frame 2.
  • the screening shafts 3 are equipped with a plurality of classifying disks 31, wherein the plurality of classifying disks 31 are fixed or arranged on the screening shafts in a rotationally fixed manner.
  • the screen shafts 3 are formed at least in their middle area by a hexagonal shape, wherein the classifying discs 31 each have a hexagonal recess for fastening the classifying disc 31 on the screen shaft 3.
  • the spacer elements 33 can be seen, by means of which the distance between two adjacent classifying disks 31 in the longitudinal direction 37 of the screen shaft 3 can be determined.
  • the classifying disks 31 are designed as elliptical disks 3, with a variable circumference 314 of the classifying disk in the circumferential direction of the classifying disk 31.
  • the classifying disks 31 are staggered or offset from one another in the longitudinal direction 37 of the screen shaft 3.
  • Each of the screen shafts 3 is assigned a carrier device 5, which is fastened to the machine frame 2 and arranged below the respective screen shaft 3.
  • the stripping devices 7 and their flat iron-shaped metal bodies 71 are arranged on the carrier devices 5.
  • the adjacent flat iron-shaped metal bodies 71 are grouped together to form stripping devices 7, whereby the stripping devices 7 are connected to one another via a cross element 72 and are arranged so as to be height-adjustable on a support device 5.
  • the screen shafts 3 are set in rotation by a drive, the direction of rotation of the screen shafts is in the Fig. 3 with the arrow 30. Due to the rotation of the screen shafts 3, the classifying disks 31 and spacer elements 33 arranged on the screen shaft 3 in a rotationally fixed manner are also driven. Due to the rotation of the plurality of classifying disks 31 arranged in the longitudinal direction 23 of the machine frame 2, a transport direction 10 of the roller grate 1 results.
  • the Fig. 4 shows a schematic detailed view of two screen shafts 3, whereby for the sake of simplicity only the essential features for explaining the function are shown in the Fig. 4
  • the Fig. 4 two screen shafts 3 arranged one behind the other in the transport direction 10 can be removed.
  • a large number of classifying disks 31 and spacer elements 33 are arranged alternately on the respective screen shafts 3 along their longitudinal axis 37.
  • the classifying disks 31 are designed in the embodiment shown as elliptical disks, with a disk plane 311, the peripheral surface of the classifying disk 312 and the variable radius of the classifying disk 313.
  • a carrier device 5 with a stripping device 7 arranged thereon in a height-adjustable manner is arranged under the screen shafts 3, whereby for better representation and recognition the combination of the carrier device 5 and stripping device 7 is only shown in the area of the Fig. 4 right screen shaft 3 is shown.
  • the two screen shafts 3 shown rotate in the direction of rotation 30 such that the plurality of classifying disks 31 and spacer elements 33 are driven in the aforementioned direction of rotation 30.
  • the carrier device 5 is arranged in a fixed position relative to the screen shafts 3.
  • a stripping device 7 is arranged on the carrier device 5 and is height-adjustable and adjustable for adjusting the distance between the flat iron-shaped metal bodies 71 and the screen shafts 3. In the Fig.
  • FIG. 4 Only a flat iron-shaped metal body 71 of the stripping device 7 is shown. As is the Fig. 4 can be removed, the surface planes 711 of the flat iron-shaped metal bodies 71 are arranged parallel to the disk planes 311 of the classifying disks 31.
  • the flat iron-shaped metal bodies 71 are arranged so that they can be adjusted in height along their longitudinal axes 712 via a clamping device 73.
  • the longitudinal axis 712 of the flat iron-shaped metal bodies 71 forms an angle with the tangent 312t of the peripheral surface 312 of the classifying disk 31, which angle can be configured in the range from 90° to about 15°.
  • the stripping device 7 is arranged so that it can be adjusted in height via a clamping device 73 on the carrier device 5, wherein the clamping device 73 on the carrier device 5 is two screw elements 733 are detachably attached, whereby the stripping device 7 can be clamped between the clamping device 73 and the carrier device 5 to determine the height.
  • the clamping device 73 in turn has a clamping plate 731 which is attached to the carrier device 5 via two screw elements 733, wherein the distance of the clamping plate 731 to the carrier device 5 can be determined via the two screw elements 733.
  • the clamping plate 731 lies on one long side of the flat iron-shaped metal body 71 and the opposite long side of the metal body 71 is pressed against the carrier device 5.
  • the majority of the flat iron-shaped metal bodies 71 are combined with one another by a cross element 72 to form a stripping device 7 that forms a group.
  • the height of the flat iron-shaped metal bodies 71 or the stripping device 7 can be determined relative to the carrier device 5 by means of a machine screw 53. Before determining the height position via the aforementioned machine screw 53, the clamping device 73 is released in such a way that the stripping device 7 with the plurality of flat iron-shaped metal bodies can be displaced relative to the carrier device 5 along the longitudinal axis 712 of the flat iron-shaped metal bodies 71.

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  • Combined Means For Separation Of Solids (AREA)
EP24174028.1A 2023-05-04 2024-05-03 Grille à rouleaux Pending EP4464426A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202023102407.6U DE202023102407U1 (de) 2023-05-04 2023-05-04 Rollenrost

Publications (1)

Publication Number Publication Date
EP4464426A1 true EP4464426A1 (fr) 2024-11-20

Family

ID=86990243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP24174028.1A Pending EP4464426A1 (fr) 2023-05-04 2024-05-03 Grille à rouleaux

Country Status (3)

Country Link
EP (1) EP4464426A1 (fr)
DE (1) DE202023102407U1 (fr)
ZA (1) ZA202403352B (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1899737A (en) * 1930-05-26 1933-02-28 Charles B Ulrich Resilient grizzly and screen
DE644501C (de) * 1935-03-19 1937-05-05 Fried Krupp Grusonwerk Akt Ges Scheibenwalzenklassierrost
DE2556512A1 (de) * 1975-12-16 1977-08-18 Krupp Gmbh Reinigungsvorrichtung fuer rollensiebroste
US8360249B1 (en) * 2006-11-22 2013-01-29 Albert Ben Currey Crusher and mechanical bucket for use therewith
US20170274424A1 (en) * 2016-03-23 2017-09-28 Kimberly-Clark Worldwide, Inc. Scraper device for disc assembly
EP3636355A1 (fr) 2018-10-08 2020-04-15 HAZEMAG & EPR GmbH Grille de tri et procédé de démontage d'une tôle support équipée des racleurs d'une grille de tri
CN112170158A (zh) * 2020-09-15 2021-01-05 北京高能时代环境技术股份有限公司 一种土壤筛分装置
CN216910928U (zh) * 2022-06-01 2022-07-08 新乡市昆仑筛分机械设计有限公司 一种超级滚轴筛

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1899737A (en) * 1930-05-26 1933-02-28 Charles B Ulrich Resilient grizzly and screen
DE644501C (de) * 1935-03-19 1937-05-05 Fried Krupp Grusonwerk Akt Ges Scheibenwalzenklassierrost
DE2556512A1 (de) * 1975-12-16 1977-08-18 Krupp Gmbh Reinigungsvorrichtung fuer rollensiebroste
US8360249B1 (en) * 2006-11-22 2013-01-29 Albert Ben Currey Crusher and mechanical bucket for use therewith
US20170274424A1 (en) * 2016-03-23 2017-09-28 Kimberly-Clark Worldwide, Inc. Scraper device for disc assembly
EP3636355A1 (fr) 2018-10-08 2020-04-15 HAZEMAG & EPR GmbH Grille de tri et procédé de démontage d'une tôle support équipée des racleurs d'une grille de tri
CN112170158A (zh) * 2020-09-15 2021-01-05 北京高能时代环境技术股份有限公司 一种土壤筛分装置
CN216910928U (zh) * 2022-06-01 2022-07-08 新乡市昆仑筛分机械设计有限公司 一种超级滚轴筛

Also Published As

Publication number Publication date
DE202023102407U1 (de) 2023-06-09
ZA202403352B (en) 2025-02-26

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