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EP3572153B1 - Broyeur à cylindres pourvu d'un racloir - Google Patents

Broyeur à cylindres pourvu d'un racloir Download PDF

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Publication number
EP3572153B1
EP3572153B1 EP18174238.8A EP18174238A EP3572153B1 EP 3572153 B1 EP3572153 B1 EP 3572153B1 EP 18174238 A EP18174238 A EP 18174238A EP 3572153 B1 EP3572153 B1 EP 3572153B1
Authority
EP
European Patent Office
Prior art keywords
blade
roller
roller mill
axis
holder
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.)
Active
Application number
EP18174238.8A
Other languages
German (de)
English (en)
Other versions
EP3572153A1 (fr
Inventor
Daniel Rickenbach
Daniel Mark
Phillipe HOLENSTEIN
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.)
Buehler AG
Original Assignee
Buehler AG
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
Priority to ES18174238T priority Critical patent/ES2823028T3/es
Application filed by Buehler AG filed Critical Buehler AG
Priority to EP18174238.8A priority patent/EP3572153B1/fr
Priority to BR112020023605-5A priority patent/BR112020023605B1/pt
Priority to MX2020012565A priority patent/MX2020012565A/es
Priority to US17/058,423 priority patent/US11618034B2/en
Priority to PCT/EP2019/063624 priority patent/WO2019224395A1/fr
Priority to AU2019272925A priority patent/AU2019272925B2/en
Priority to CN201980046406.4A priority patent/CN112423889A/zh
Priority to RU2020142827A priority patent/RU2754044C1/ru
Priority to KR1020207036746A priority patent/KR102318276B1/ko
Priority to JP2020565877A priority patent/JP6980135B2/ja
Priority to CA3101384A priority patent/CA3101384C/fr
Publication of EP3572153A1 publication Critical patent/EP3572153A1/fr
Application granted granted Critical
Publication of EP3572153B1 publication Critical patent/EP3572153B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/40—Detachers, e.g. scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/02—Crushing or disintegrating by roller mills with two or more rollers

Definitions

  • the invention relates to a roller mill with a stripper according to the independent claim.
  • Curved rollers are used in roller mills to counteract a bending of the roller during operation, which is caused by the high contact forces that prevail when grinding the ground material. This ensures that the grinding gap has a uniform grinding gap width during operation.
  • a scraper is arranged, which is used for stripping ground material.
  • the scraper should ensure that regrind does not stick to the roller, since such regrind is undesirable in many ways.
  • regrind that sticks to the roller causes a narrowing of the reed when it passes through the grinding gap, which can lead to undesirable oscillations and vibrations.
  • the adhering regrind is compressed and compressed so that the removal of regrind adhering to the roller is made more difficult with a scraper. This is adversely affected by the high temperatures prevailing during grinding, which cause drying and "baking" of regrind.
  • adhesive regrind offers a better adhesion surface for further regrind and favors the growth of such regrind buildup. In the worst case, the roller must be stopped and incrustations removed manually.
  • wipers have been used which have a blade with a straight wiper edge in the idle state or in the undeformed state, which is firmly clamped in a holder becomes.
  • the holder is arranged pivotably below the roller, immediately after the nip and is pressed against the roller in operation by means of a counterweight which is attached to a bracket of the holder.
  • the blade is aligned with the roller at rest and the bracket is then bent in the center, which coincides with the center of the roller, using a pulling device (which often also serves as a counterweight boom) to compensate for the roller's bombing.
  • a pulling device which often also serves as a counterweight boom
  • Such a scraper is in the EP 0 040 432 A1 shown.
  • the roller mill comprises a housing with a regrind inlet, at least one regrind outlet and at least two cambered rollers, which are each arranged rotatably about a roller axis in the housing.
  • a wiper is assigned to at least one roller.
  • Several rollers, preferably all rollers of the roller mill, are preferably equipped with a stripper.
  • a plurality of wipers can also be assigned to a roller.
  • the stripper comprises a blade for stripping ground material from a roller surface.
  • the blade has a scraper edge that extends the entire length of the blade.
  • the length of the blade preferably corresponds essentially to the axial length of the roller, so that the entire roller surface can be stripped off with one blade.
  • a segmented blade consisting of several elements, which can line up the entire roll surface, is also conceivable.
  • the scraper further comprises a holder with a receiving area, the holder being arranged in the housing so as to be tiltable about an axis parallel to the roller axis.
  • the holder and consequently the blade can thus be removed from the roller surface by tilting, for example if no grinding operation is carried out in order to protect the blade and the roller surface.
  • an elastic mounting is arranged between the blade and the receiving area.
  • the elastic mounting in the receiving area of the blade means that the blade is not clamped firmly in the holder, but rather that the blade can move relative to the holder.
  • the elastic mounting is arranged on the side of the blade which, when the roller mill is in operation, is subjected to pressure when the blade touches the roller surface, that is to say it faces away from the roller.
  • the blade can thus be designed in such a way that a bend is possible to adapt to the roll surface, but is rigid for other bending moments, in particular bending moments parallel to the roll axis, so that fluttering of the blade is avoided during operation.
  • the holder on the roller mill is preferably arranged such that the axis of the holder remains parallel to the roller axis when the roller axis moves (e.g. a set).
  • the receiving area is preferably designed as a groove, with an elastic bearing being arranged at least between a groove wall and the blade.
  • the thickness of the bearing (on one or both sides of the blade) is typically between 2 and 10 mm within the scope of the invention.
  • the groove wall is the groove wall which extends in the depth direction of the groove.
  • the groove bottom is the wall of the groove which is an open side of the groove, which corresponds to a lateral surface of the holder, is facing away.
  • the groove is preferably designed as a groove with two mutually parallel groove walls and a flat groove bottom, which is arranged perpendicular to the groove walls.
  • An elastic mounting is preferably arranged between the blade and the two groove walls.
  • Such an embodiment allows the blade to bend on both sides, so that in order to allow the same freedom of movement as the embodiment described above with only one elastic bearing, two half-as-thick elastic bearings must be arranged on both sides of the blade.
  • the blade preferably lies on a groove bottom.
  • the blade and the at least one elastic mounting are preferably held in a clamping profile which is arranged in the receiving area.
  • the blade and the at least one elastic bearing are held in a clamping profile.
  • the clamping profile is then inserted into the receiving area and held there with holding means.
  • the clamping profile can be designed such that an elastic mounting is arranged on a profile wall (which corresponds to a groove wall) or on both profile walls.
  • the blade can also rest on a profile floor (corresponds to the groove floor) to avoid slipping.
  • the blade and / or the holder and / or the clamping profile preferably comprise lateral limiting means, which prevent the blade from being displaced in the axial direction with respect to the roller axis.
  • the blade is preferably designed as a flat profile, in particular with a rectangular cross section.
  • the blade is preferably formed from a cold-rolled steel strip (for example in steel quality WB, without chrome and nickel, hardened, tempered and white polished). Blades with a tensile strength in the range of 1,550-2,350 MPa (measured in accordance with EN 10132-1) are particularly preferred.
  • the thickness of the blade is typically 0.5 to 2 mm within the scope of the invention.
  • the blade preferably has a length to width ratio of 1.6: 1 to 300: 1.
  • blade length means the spatial extent of the blade in the direction of extension of the scraper edge.
  • the length of the blade can be between 100mm and 3,000mm, preferably between 500mm and 2,500mm, particularly preferably between 1'000mm and 2'000mm, for example 1'500mm.
  • the blade width means the spatial extension perpendicular to the blade length.
  • the width of the blade can be between 10mm and 60mm, preferably between 20mm and 55mm, particularly preferably 30mm and 50mm, for example 40mm.
  • the blade height is thus the spatial extension of the blade perpendicular to the blade length and the blade width, which extends from the scraper edge to an end facing away from the scraper edge.
  • the blade height typically, between 10 and 30 mm of the total blade height are accommodated in the elastomeric bearing within the scope of the invention.
  • the blade preferably has a height to free height ratio of 6: 1, more preferably greater than 1: 1 to 6: 1.
  • the free height of the blade means the height dimension of the blade that protrudes from the holder. Since the blade does not touch the holder, the height dimension between the scraper edge and an (imaginary) envelope surface of the holder is understood as the free height.
  • the blade is preferably arranged at an angle between 20 ° and 75 °, more preferably between 30 ° and 60 °, particularly preferably between 30 ° and 50 ° to the roller surface when the blade touches the roller surface.
  • the angle is measured as the angle between a plane tangential to the roll surface and the height direction of the blade.
  • the blade is bent according to the invention when the roller is touched and consequently the angle varies slightly over the length of the blade, the angle in the center of the roller, where the crowning of the roller is at its maximum, is used as the reference angle.
  • the elastic bearing can be formed from or comprise elastomeric materials, preferably selected from the group consisting of: natural rubber (NR); Styrene-butadiene rubber (SBR); Butyl rubber (IIR); Ethylene propylene rubber (EPDM); Nitrile rubber (NBR); Chloroprene neoprene (CR); Chlorosulfonated polyethylene, hypalon (CSM); Polyurethane rubber (AU, EU); Silicone rubber ((M) Q); Polyacrylate elastomer (ACM); hydrogenated nitrile rubber (H-NBR); Fluororubber, Viton (FPM); Polyurethane (PU). Ethylene-propylene rubber (EPDM) and silicone rubber ((M) Q) are particularly preferred.
  • NR natural rubber
  • SBR Styrene-butadiene rubber
  • IIR Butyl rubber
  • EPDM Ethylene propylene rubber
  • NBR Nitrile rubber
  • CSM Chloropren
  • the elastic mounting is designed as an elastomer strip.
  • the storage, in particular the elastomer strips can be continuous or interrupted over the entire length of the blade.
  • An interrupted formation of the bearing is possible and useful, in particular, for the individual adaptation of the rigidity of the resulting total bearing; for example, a harder material can be arranged in an interrupted manner in order to achieve a hardness of the overall bearing that corresponds to a continuous bearing made of a softer material.
  • the bearing in particular the elastomeric material of the elastomer strip, has a hardness between 15 and 100 Shore OO, preferably between 30 and 90 Shore OO, particularly preferably between 40 and 80 Shore OO (according to ASTM D 2240; and / or between 5 and 30 Shore A (measured according to DIN ISO 7619-1).
  • the density of the elastic support can be between 0.25 g / cm 3 and 0.85 g / cm 3 , preferably 0.35 g / cm 3 and 0.75 g / cm 3 , particularly preferably 0.45 g / cm 3 and 0.65 g / cm 3 (according to DIN 53479 A ).
  • Such an embodiment represents a very simple and inexpensive variant.
  • the strip can be exchanged and its hardness can be adjusted.
  • the holder is preferably provided with a counterweight by means of which the blade can be tilted about the axis and pressed against the roller surface.
  • the contact pressure of the blade against the roller can be adjusted in a simple manner, be it by changing the weight and / or the lever arm length.
  • the scraper is preferably in operative connection with a lifting device, by means of which the blade can be tilted about the axis and moved away from the roller surface.
  • This embodiment allows the blade to be removed from the roller surface when there is no grinding process and is in particular coupled to an actuator arrangement of the rollers, so that when the rollers are inserted and / or disengaged the blade is also brought into contact with the blade surface and / or from this is moved away.
  • the blade is preferably arranged such that the scraper edge is parallel to the roller axis when the blade is not touching the roller surface.
  • the blade is preferably received in the receiving area over its entire length.
  • the elastic mounting is consequently formed over the entire length of the blade.
  • the blade can be accommodated only in sections in the receiving area and / or the elastic mounting can be formed only in sections over the length of the blade. It is understood that in such a case, in the areas without elastic support, the blade, if it does not touch the roller surface, must not touch the receiving area either.
  • a roller mill 1 according to the present invention is shown schematically.
  • the roller mill 1 comprises a Housing 2 with a regrind inlet, indicated by the arrow 3, and a regrind outlet 4, also indicated by the arrow 4.
  • Two cambered rollers 5 and 5 ' are arranged in the housing 2, which are each rotatably mounted about a roller axis 6 and 6' and can be driven in opposite directions by means of a drive (not shown).
  • the direction of rotation of the rollers 5 and 5 ' is indicated by an arrow.
  • each roller 5 or 5 ' is assigned a scraper 7 or 7'.
  • the scraper 7 of the roller 5 is separated into two possible variants in the Figures 2 and 3rd shown.
  • the scraper 7 of Figures 2 and 3rd comprises a blade 8, which is formed from a flat metal profile with a length L, a width B and a height H.
  • the longitudinal direction of the blade 8 is indicated by the vector L.
  • the scraper 7 has a holder 11 which is arranged to be tiltable about an axis 13.
  • the axis 13 runs parallel to the roller axis 6 or 6 'and remains parallel to the roller axis 6 or 6', even if the roller axis is displaced, for example when the rollers are set.
  • the bracket 11 comprises a receiving area 12, which as a groove 15 with two parallel to each other extending groove walls 16 and 16 'and a perpendicular groove bottom 17, which extend in the longitudinal direction L of the blade 8 (and thus the holder 11).
  • the blade 8 is arranged in the groove 15 and touches the end of the groove 17 with the end facing away from the scraper edge.
  • An elastomer strip 14 is arranged on both sides of the blade 8 between the respective groove wall 16 or 16 'and the blade 8, so that the blade 8 enjoys a certain freedom of movement in the groove 15 and in particular can be bent parallel to the height of the blade 8 by a bending moment and can adapt to the curvature of the roller 5.
  • FH is the free height of the blade 8, which corresponds to the height of the blade 8, which is not arranged between the elastomer strips 14.
  • the holder 11 is, as already explained above, arranged to be tiltable about the axis 13.
  • the holder comprises a counterweight 19 which, by lever action, causes the holder 11 to tilt and the blade 8 to be pressed against the roller surface 9.
  • the Indian Figure 3 The scraper 7 shown corresponds in structure to the scraper 7 Figure 2 with the difference that the blade 8 and the elastomer strips 14 are arranged in a clamping profile 18, the clamping profile 18 being inserted in the receiving region 12 of the holder 11.
  • the clamping profile 18 is designed as a plastic profile and has two profile walls 160 and 160 'which run parallel to one another and a profile floor 170 which runs perpendicularly thereto and which correspond in function to the groove walls 16 and 16' and the groove base 17, respectively.
  • the clamping profile 18 simplifies the placement of the blade 8 with the elastomer strips 14 in the receiving area 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Cleaning In General (AREA)
  • Crushing And Pulverization Processes (AREA)

Claims (13)

  1. Broyeur à cylindres (1) comprenant un boîtier (2) pourvu d'une entrée de produit broyé (3), d'au moins une sortie de produit broyé (4) et d'au moins deux cylindres bombés (5, 5'), qui sont chacun agencés de manière rotative autour d'un axe de cylindre (6) dans le boîtier (2), un racloir (7) étant associé à au moins un cylindre (5), le racloir (7)
    - présentant une lame (8) pour le raclage de produit broyé d'une surface de cylindre (9) avec un bord de racloir (10), qui s'étend sur la longueur entière (L) de la lame (8), et
    - comprenant un support (11) avec une zone de réception (12), le support étant agencé de manière basculable autour d'un axe (13) parallèle à l'axe de cylindre dans le boîtier (2),
    caractérisé en ce qu'un palier élastique (14) est agencé entre la lame (8) et la zone de réception (12).
  2. Broyeur à cylindres (1) selon la revendication 1, caractérisé en ce que la zone de réception (12) est configurée sous la forme d'une rainure (15), un palier élastique (14) étant agencé au moins entre une paroi de rainure (16) et la lame (8).
  3. Broyeur à cylindres (1) selon la revendication 2, caractérisé en ce qu'un palier élastique (14) est agencé entre la lame (8) et les deux parois de rainure (16, 16').
  4. Broyeur à cylindres (1) selon la revendication 2 ou 3, caractérisé en ce que la lame (8) repose sur un fond de rainure (17).
  5. Broyeur à cylindres (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la lame (8) et le palier élastique (14) sont maintenus dans un profilé de serrage (18), qui est agencé dans la zone de réception (12).
  6. Broyeur à cylindres selon l'une quelconque des revendications précédentes, caractérisé en ce que la lame (8) présente un rapport entre la longueur (L) et une largeur (B) de 1,6:1 à 300:1.
  7. Broyeur à cylindres (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la lame (8) présente un rapport entre la hauteur (H) et la hauteur libre (FH) de plus de 1:1 à 6:1.
  8. Broyeur à cylindres (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la lame (8) est agencée à un angle (α) compris entre 20° et 75°, de préférence entre 30° et 60°, de manière particulièrement préférée entre 30° et 50°, par rapport à la surface de rouleau (9).
  9. Broyeur à cylindres (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le palier élastique (14) est configuré sous la forme d'une bande élastomère ayant une dureté Shore OO comprise entre 15 et 100, de préférence entre 30 et 90, de manière particulièrement préférée entre 40 et 80.
  10. Broyeur à cylindres (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le support est muni d'un contre-poids (19), au moyen duquel la lame (8) peut être basculée autour de l'axe (13) et pressée contre la surface de cylindre (9).
  11. Broyeur à cylindres (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le racloir (7) est en liaison active avec un dispositif de soulèvement, au moyen duquel la lame (8) peut être basculée autour de l'axe (13) et éloignée de la surface de cylindre (9).
  12. Broyeur à cylindres (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la lame (8) est agencée de telle sorte que le bord de racloir (10) soit parallèle à l'axe de cylindre (6) lorsque la lame (8) n'est pas en contact avec la surface de cylindre.
  13. Broyeur à cylindres (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la lame (8) est reçue sur sa longueur entière (L) dans la zone de réception (12).
EP18174238.8A 2018-05-25 2018-05-25 Broyeur à cylindres pourvu d'un racloir Active EP3572153B1 (fr)

Priority Applications (12)

Application Number Priority Date Filing Date Title
EP18174238.8A EP3572153B1 (fr) 2018-05-25 2018-05-25 Broyeur à cylindres pourvu d'un racloir
ES18174238T ES2823028T3 (es) 2018-05-25 2018-05-25 Molino de rodillos con un rascador
KR1020207036746A KR102318276B1 (ko) 2018-05-25 2019-05-27 스크레이퍼를 갖는 롤러 분쇄기
US17/058,423 US11618034B2 (en) 2018-05-25 2019-05-27 Roller mill with a scraper
PCT/EP2019/063624 WO2019224395A1 (fr) 2018-05-25 2019-05-27 Broyeur à cylindres pourvu d'un racloir
AU2019272925A AU2019272925B2 (en) 2018-05-25 2019-05-27 Roller mill with a scraper
BR112020023605-5A BR112020023605B1 (pt) 2018-05-25 2019-05-27 Moinho de cilindro com um raspador
RU2020142827A RU2754044C1 (ru) 2018-05-25 2019-05-27 Вальцовая мельница со скребком
MX2020012565A MX2020012565A (es) 2018-05-25 2019-05-27 Molino de rodillos con raspador.
JP2020565877A JP6980135B2 (ja) 2018-05-25 2019-05-27 スクレーパを備えたローラミル
CA3101384A CA3101384C (fr) 2018-05-25 2019-05-27 Broyeur a cylindres pourvu d'un racloir
CN201980046406.4A CN112423889A (zh) 2018-05-25 2019-05-27 带有刮刀的辊磨机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18174238.8A EP3572153B1 (fr) 2018-05-25 2018-05-25 Broyeur à cylindres pourvu d'un racloir

Publications (2)

Publication Number Publication Date
EP3572153A1 EP3572153A1 (fr) 2019-11-27
EP3572153B1 true EP3572153B1 (fr) 2020-08-05

Family

ID=62386078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18174238.8A Active EP3572153B1 (fr) 2018-05-25 2018-05-25 Broyeur à cylindres pourvu d'un racloir

Country Status (12)

Country Link
US (1) US11618034B2 (fr)
EP (1) EP3572153B1 (fr)
JP (1) JP6980135B2 (fr)
KR (1) KR102318276B1 (fr)
CN (1) CN112423889A (fr)
AU (1) AU2019272925B2 (fr)
BR (1) BR112020023605B1 (fr)
CA (1) CA3101384C (fr)
ES (1) ES2823028T3 (fr)
MX (1) MX2020012565A (fr)
RU (1) RU2754044C1 (fr)
WO (1) WO2019224395A1 (fr)

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CN112403577A (zh) * 2020-10-21 2021-02-26 衡阳市大宇锌业有限公司 一种化工生产用原料处理的防粘料磨粉装置
CN112659412B (zh) * 2020-12-26 2023-08-29 安徽省腾越铝塑有限公司 一种铝塑碎片碾压分离装置及方法
CN113560015A (zh) * 2021-07-30 2021-10-29 李祥兴 一种医药生产用研磨装置
US12076729B2 (en) * 2021-10-22 2024-09-03 Metso Outotec USA Inc. Roller crusher and method for arrangement thereof
US11925942B2 (en) 2021-10-22 2024-03-12 Metso Outotec USA Inc. Roller crusher and method for operating thereof
US12097506B2 (en) * 2021-10-22 2024-09-24 Metso Outotec USA Inc. Roller crusher and method for operating thereof
US11938488B2 (en) * 2021-12-09 2024-03-26 Metso Outotec USA Inc. Roller crusher and method for operation thereof
CN114632597B (zh) * 2022-03-17 2023-04-11 福建省南仹生物科技有限公司 一种猪胆粉加工制备用粉碎装置
CH719888A1 (de) 2022-07-12 2024-01-31 Swisca Ag Walzenstuhl und Abstreifer für Walzenstuhl.
US20240082849A1 (en) * 2022-09-08 2024-03-14 Metso Outotec USA Inc. Roller crusher and a method for operating the same

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KR20210005286A (ko) 2021-01-13
EP3572153A1 (fr) 2019-11-27
CN112423889A (zh) 2021-02-26
US11618034B2 (en) 2023-04-04
ES2823028T3 (es) 2021-05-05
RU2754044C1 (ru) 2021-08-25
BR112020023605A8 (pt) 2021-08-17
BR112020023605A2 (pt) 2021-02-09
AU2019272925A1 (en) 2020-12-17
CA3101384A1 (fr) 2019-11-28
BR112020023605B1 (pt) 2021-09-21
JP6980135B2 (ja) 2021-12-15
CA3101384C (fr) 2021-07-06
AU2019272925B2 (en) 2021-11-04
JP2021514836A (ja) 2021-06-17
KR102318276B1 (ko) 2021-10-27
MX2020012565A (es) 2021-10-26
US20210213456A1 (en) 2021-07-15
WO2019224395A1 (fr) 2019-11-28

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