EP4135901B1 - Mahltellersegmentsystem und verfahren hierzu - Google Patents

Mahltellersegmentsystem und verfahren hierzu Download PDF

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Publication number
EP4135901B1
EP4135901B1 EP20720400.9A EP20720400A EP4135901B1 EP 4135901 B1 EP4135901 B1 EP 4135901B1 EP 20720400 A EP20720400 A EP 20720400A EP 4135901 B1 EP4135901 B1 EP 4135901B1
Authority
EP
European Patent Office
Prior art keywords
grinding
grinding pan
segment
segments
key
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
EP20720400.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP4135901A1 (de
Inventor
Jörg BETTENWORTH
Michael Keyssner
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.)
Loesche GmbH
Original Assignee
Loesche 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 Loesche GmbH filed Critical Loesche GmbH
Publication of EP4135901A1 publication Critical patent/EP4135901A1/de
Application granted granted Critical
Publication of EP4135901B1 publication Critical patent/EP4135901B1/de
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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/003—Shape or construction of discs or rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2210/00—Codes relating to different types of disintegrating devices
    • B02C2210/02—Features for generally used wear parts on beaters, knives, rollers, anvils, linings and the like

Definitions

  • the invention relates to a grinding table segment system for a grinding track of a grinding table of a roller mill.
  • the invention relates to a method for removing grinding table segments from a grinding table with a grinding table segment system.
  • the ring-shaped grinding track usually has equally sized, interchangeable segments that have a shape similar to a piece of cake. This means that they are trapezoidal in shape and have a longer outer edge than their inner edge. To be precise, both the outer edge and the inner edge describe an arched shape, which is due to the ring-shaped design of the grinding track. However, it is also possible to make the inner and outer edges straight, so that the grinding track has a polygonal shape that is similar to a ring shape.
  • a grinding table is often also referred to as a grinding bowl.
  • the grinding table segments are also referred to as grinding table plates or plate segments.
  • the grinding table segments are also often referred to as grinding plates or grinding bowl armor.
  • the invention is therefore based on the object of specifying a grinding table segment system and a method for exchanging grinding table segments, which facilitate the exchange process.
  • the invention is based on the basic idea of deviating from the previously classic form used. Because the replaceable key grinding plate segment is dimensioned in such a way that it no longer jams itself when pushed towards the center of the grinding plate due to its geometric shape, it is possible to remove the key grinding plate segment in this way.
  • Another advantage of this design is that the gap between the key grinding plate segment and its connecting edges to the adjacent grinding plate segments automatically increases, thus eliminating the problems are minimized by solidified ground material or do not come into effect in this form.
  • a pressing recess is provided on the outer edge of the key grinding plate segment for attaching a press for the exchange process.
  • a pressing tool can be attached using this pressing recess and press the key grinding plate segment towards the center of the grinding plate.
  • the pressing tool can be attached between the pressing recess and the edge of the main body of the grinding plate.
  • the pressing recess is designed in such a way that it can be covered by a retaining edge component during operation. This means that it is designed in such a way that the construction prevents, as far as possible, crushed ground material from being pressed into the pressing recess.
  • a grinding plate segment system for a grinding track of a grinding plate of a roller mill with several grinding plate segments, each of which has an inner edge and an outer edge. The two edges are connected by two connecting edges. The length of the inner edges is less than the length the outer edge.
  • the standard grinding plate segments have a shape similar to a piece of cake, but the tip is missing.
  • the grinding table segment system further comprises at least one key grinding table segment and at least one compensating grinding table segment, which is arranged next to the key grinding table segment.
  • the grinding plate which is constructed from the grinding plate segment system, or the rolling surface of the rollers, to be replaced relatively easily without the need for laborious removal and crushing of material from the joints, as previously described in the prior art.
  • the grinding plate segments are designed as standard grinding plate segments of the same size and shape, and the key grinding plate segment and the at least one compensating grinding plate segment together form the shape of one or more standard grinding plate segments.
  • This dimensioning of the exchangeable key grinding table segment and the provision of a compensating grinding table segment, which together form the shape of one or more standard grinding table segments, means that all other standard grinding table segments can be designed in the same way. This makes storage easier and means that only a few different grinding table components need to be kept in stock. Conventional segments can also continue to be used for this purpose.
  • Grinding table segments can also be called grinding plates.
  • two compensating grinding plate segments are provided in an arrangement to the left and right of the key grinding plate segment.
  • the two compensating grinding plate segments can be designed essentially mirror-symmetrically to an axis on the radius of the grinding plate through the key grinding plate segment. This axis can, for example, be the axis of symmetry on the radius of the key grinding plate segment.
  • Such a design makes it easy to achieve the size of one or more standard grinding plate segments using a key grinding plate segment and two compensating grinding plate segments. This is made even easier by providing mirror-symmetrical compensating grinding plate segments.
  • the grinding plate segments can also be designed as compensating grinding plate segments.
  • the grinding plate segments can also be designed as compensating grinding plate segments.
  • a key grinding plate segment is followed by a compensating grinding plate segment.
  • standard grinding plate segments as described above, are no longer used.
  • the compensating grinding plate segments can also be viewed as a combination, as described in the previous embodiment, of standard grinding plate segments with compensating grinding plate segments, provided that these are made in one piece. In this case, it is only necessary to have two different types of grinding plate segments available.
  • Another advantage is that several key grinding plate segments are provided, so that it is irrelevant in which position the grinding plate comes to rest in relation to the grinding rollers arranged above it. Otherwise, care must be taken to ensure that the key grinding plate segment does not come to rest in the area of a roller, as this would make disassembly complicated and ideally the bowl would have to be rotated further.
  • the grinding plate segments i.e. the standard grinding plate segments, the key grinding plate segment(s) and/or the compensating grinding plate segments, can be fastened to the grinding plate by means of a one- or multi-part clamping ring.
  • the design provides that the clamping ring is attached to the inner circumference of the grinding track, i.e. to the inner edge of the grinding plate segments. and thus presses the grinding table segments outwards against an edge of the grinding table base body.
  • the invention further relates to a roller mill with a grinding table, wherein the grinding table has a grinding table segment system according to the invention.
  • Such a roller mill has the advantage that replacing the grinding track, i.e. the individual grinding plate segments, and installing new ones can be done much more quickly than with conventional grinding plate segments. This is because the key grinding plate segment can be removed very easily from the grinding track and it is hardly necessary to remove the grinding material that has accumulated on the edge between the key grinding plate segment and the neighboring segments before removing the key grinding plate segment.
  • Fig.1 is a schematic representation of a top view of a grinding table 4 with a grinding track 5 according to a first embodiment.
  • the grinding track 5 is made up of a key grinding table segment 10, two mirror-symmetrically formed compensating grinding table segments 11 and ten standard grinding table segments 12.
  • the key grinding plate segment 10 has an outer edge 31, an inner edge 32 and two lateral connecting edges 33.
  • the standard grinding plate segments 12 also have an outer edge 41, an inner edge 42 and two connecting edges 43.
  • the outer edge 31 of the key grinding plate segment 10 according to the invention has a shorter length than its inner edge 32. As a result, the key grinding plate segment 10 can be pushed inwards towards the grinding plate center 6.
  • this offers the advantage that by pushing the key grinding plate segment 10 inwards, the free space between the connecting edges 33 of the key grinding plate segment 10 and the adjacent connecting edges 53 of the compensating grinding plate segments 11 increases. This also means that ground material pressed into it cannot prevent it from being pushed inwards.
  • the key grinding table segment 10 has the size of two normal standard grinding table segments 12. This means that standard elements can be used for the rest of the grinding path.
  • FIG.2 An alternative design of the grinding table 5 is shown.
  • the grinding table 5 according to this embodiment has, for example, six key grinding table segments 10 and, for example, six compensating grinding table segments 11. These are arranged alternately on the grinding table 5.
  • the standard grinding plate segments 12 are omitted here.
  • only two different types of grinding table segments are used. This simplifies storage.
  • a further advantage of this embodiment is that the first key grinding table segment 10, which is removed by pushing it inwards towards the grinding table center 6, can be freely selected.
  • Fig.3 a sectional view through a grinding table 4 is shown.
  • a pressing recess 15 is shown in the right-hand area of the key grinding table segment 10. This is covered by a retaining edge 26.
  • the position of the retaining edge 26 ensures that hardly any or at least very little grinding material gets into the pressing recess 15 during operation, i.e. during the grinding processes.
  • the key grinding plate segment 10 itself is arranged and fastened in a recess in the grinding plate body 7 by means of a clamping ring 20.
  • the key grinding plate segment 10 is inserted, then the clamping ring 20 is attached. This is fastened using a screw 21. Due to the wedge shape, the clamping ring presses the key grinding plate segment 10 against the outer edge of the grinding plate when the screw 21 is tightened.
  • the other grinding plate segments 11, 12 are fastened in a similar way before or after.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Adjustment And Processing Of Grains (AREA)
EP20720400.9A 2020-04-16 2020-04-16 Mahltellersegmentsystem und verfahren hierzu Active EP4135901B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2020/060674 WO2021209133A1 (de) 2020-04-16 2020-04-16 Schlüssel-mahltellersegment, mahltellersegmentsystem und verfahren hierzu

Publications (2)

Publication Number Publication Date
EP4135901A1 EP4135901A1 (de) 2023-02-22
EP4135901B1 true EP4135901B1 (de) 2024-05-29

Family

ID=70333937

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20720400.9A Active EP4135901B1 (de) 2020-04-16 2020-04-16 Mahltellersegmentsystem und verfahren hierzu

Country Status (10)

Country Link
US (1) US12415187B2 (da)
EP (1) EP4135901B1 (da)
JP (1) JP7427807B2 (da)
CN (1) CN115515716B (da)
AU (1) AU2020442474B2 (da)
DK (1) DK4135901T3 (da)
ES (1) ES2990186T3 (da)
MX (1) MX2022012993A (da)
WO (1) WO2021209133A1 (da)
ZA (1) ZA202211068B (da)

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US412568A (en) * 1889-10-08 Vaughn
US347232A (en) * 1886-08-10 Grin-ding-mill
US1110222A (en) * 1910-11-18 1914-09-08 Jacques Morat Grinding machinery.
DE854457C (de) * 1950-10-09 1952-11-04 Ver Kesselwerke Ag Walzenringmuehle
GB761696A (en) * 1954-05-11 1956-11-21 Bernard Mann Improvements relating to crushing or grinding mills
US3061208A (en) * 1958-07-15 1962-10-30 Schauer Siegfried Crushing mill
US3138337A (en) * 1963-03-26 1964-06-23 Combustion Eng Pulverizing bowl mill utlizing a segmented bull ring
GB1114923A (en) * 1964-07-01 1968-05-22 P H I Engineering Ltd Improvements in and relating to ring or turntable roller pulverising mills
US3366338A (en) * 1965-12-07 1968-01-30 Foster Wheeler Corp Segment-type grinding ring
US3409236A (en) * 1965-12-21 1968-11-05 Combustion Eng Segmented grinding roll assembly
DE1507580A1 (de) 1966-05-20 1969-04-03 Loesche Kg Verschleissteil,insbesondere Mahlringsegment fuer Waelzmuehlen,Walzenmuehlen,Federrollenmuehlen u.dgl.
DE1507629A1 (de) * 1966-12-28 1969-04-10 Pfeiffer Barbarossawerke Mahlplatte fuer Walzenquetschmuehlen
DE2124521B2 (de) * 1971-05-18 1979-10-18 Horst Dipl.-Ing. 4044 Kaarst Brundiek Walzenschüsselmühle
DE3061720D1 (en) * 1979-03-19 1983-03-03 Smidth & Co As F L Roller mill and method of operation
DE8204278U1 (de) * 1982-02-16 1982-06-24 Gebr. Pfeiffer Ag, 6750 Kaiserslautern Mahlschuessel fuer walzenmuehlen
JPS59184946U (ja) * 1983-05-24 1984-12-08 石川島播磨重工業株式会社 竪型ミルのテ−ブルライナの固定装置
DE3344223A1 (de) * 1983-12-07 1985-06-20 Deutsche Babcock Werke AG, 4200 Oberhausen Schuesselmuehle
DE3415072A1 (de) * 1984-04-21 1985-10-24 Deutsche Babcock Werke AG, 4200 Oberhausen Schuesselmuehle
FR2615409B1 (fr) 1987-05-22 1991-11-08 Magotteaux Sa Piece d'usure composite pour broyeurs verticaux
JPH01163440U (da) * 1988-04-27 1989-11-14
US20090011913A1 (en) * 2007-07-02 2009-01-08 Babcock Power Inc. Tire for material treatment system
US20110114769A1 (en) * 2009-11-19 2011-05-19 Wark Rickey E Double course vane wheel
CN203018137U (zh) * 2012-12-27 2013-06-26 中材（天津）粉体技术装备有限公司 一种立磨磨盘衬板防滑装置
US10493462B2 (en) * 2016-06-21 2019-12-03 General Electric Technology Gmbh System, method and apparatus for upgrading a pulverizer
CN110354957B (zh) 2019-08-21 2024-08-09 上海卡山科技股份有限公司 一种hp中速磨煤机磨碗装置
CN211070290U (zh) * 2019-11-27 2020-07-24 昌群精细工业（宜昌）有限公司 一种用于立式磨机的磨盘
CN110773277B (zh) * 2019-11-29 2024-11-12 安徽同创电力科技有限公司 一种组合式金属陶瓷复合一体化磨煤机动静环及制备方法

Also Published As

Publication number Publication date
MX2022012993A (es) 2022-12-08
JP7427807B2 (ja) 2024-02-05
ES2990186T3 (es) 2024-11-29
AU2020442474A1 (en) 2022-11-03
EP4135901A1 (de) 2023-02-22
JP2023529059A (ja) 2023-07-07
WO2021209133A1 (de) 2021-10-21
US20230191418A1 (en) 2023-06-22
ZA202211068B (en) 2023-05-31
BR112022020930A2 (pt) 2022-12-27
DK4135901T3 (da) 2024-08-19
CN115515716B (zh) 2023-12-26
AU2020442474B2 (en) 2024-02-15
US12415187B2 (en) 2025-09-16
CN115515716A (zh) 2022-12-23

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