EP4135901A1 - Segment de plaque de fraisage à clé, système de segment de plaque de fraisage et procédé associé - Google Patents

Segment de plaque de fraisage à clé, système de segment de plaque de fraisage et procédé associé

Info

Publication number
EP4135901A1
EP4135901A1 EP20720400.9A EP20720400A EP4135901A1 EP 4135901 A1 EP4135901 A1 EP 4135901A1 EP 20720400 A EP20720400 A EP 20720400A EP 4135901 A1 EP4135901 A1 EP 4135901A1
Authority
EP
European Patent Office
Prior art keywords
grinding
segment
key
grinding table
segments
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
EP20720400.9A
Other languages
German (de)
English (en)
Other versions
EP4135901B1 (fr
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/fr
Application granted granted Critical
Publication of EP4135901B1 publication Critical patent/EP4135901B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 key grinding table segment for a grinding track of a grinding bowl of a roller mill.
  • the grinding track has a ring-like shape with an outer circumference and a smaller inner circumference around a center point.
  • the exchangeable key grinding table segment has an outer edge and an inner edge as well as two connecting edges connecting the outer and inner edges.
  • the invention also relates to a grinding table segment system for a grinding path of a grinding table of a roller mill with several equally sized, identically shaped standard grinding table segments which each have an inner edge and an outer edge which are connected by two connecting edges.
  • the length of the inner edge is less than the length of the outer edge.
  • the invention relates to a method for removing Mahltel lersegmenten from a grinding table with a grinding table segment system.
  • Common roller mills have a grinding table which rotates under the stationary, rotatably mounted grinding rollers.
  • the grinding table has a grinding track on which the grinding rollers roll. Between the grinding table or the grinding track and the grinding rollers, there is ground material to be comminuted during operation.
  • the grinding rollers work by their own weight, but are sometimes also subjected to additional force so that they press on the grinding track and thus on the grinding table.
  • the forces that occur like the material abrasion caused by grinding stock wear on the one hand on the grinding rollers and on the other hand on the grinding track. This is why the grinding track in most roller mills is designed to be interchangeable.
  • the ring-shaped grinding track usually has exchangeable segments of the same size, which have a shape similar to a piece of cake. This means that they are designed like a trapezium and have a greater length on their outer edge than on their inner edge. Exactly describes both the outer edge and the inner edge an arc shape, which is due to the annular design of the grinding track be. However, it is also possible to train the inner and outer edges straight, so that the grinding track forms a polygonal shape which approximates 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, a grinding table segment system and a method for exchanging grinding table segments which facilitate the exchange process.
  • this object is achieved by a key grinding table segment with the features of claim 1, a grinding table segment system with the features of claim 6 and a method with the features of claim 15.
  • the length of the inner edge located closer to the center point is greater than the length of the outer edge located further away from the center point.
  • the invention is based on the basic idea of deviating from the previously classic form used. Because the exchangeable key grinding table segment is dimensioned in such a way that it no longer jams itself when it is pushed towards the center of the grinding table due to its geometric shape, it is possible to remove the key grinding table segment in this way.
  • Another advantage of this construction is that the gap between the key grinding table segment and its connecting edges to the neighboring grinding table segments automatically increases, and thus the problems are minimized by solidified regrind or do not come into play in this form.
  • the outer edge of the key grinding table segment forms an arc on the outer circumference and the inner edge of the key grinding table segment forms an arc on the inner circumference of the grinding table.
  • the key grinding table segment fits with its dimensions on the grinding path of the grinding table, although the tip is missing.
  • the length of a circular arc which is formed by the key grinding table segment can decrease with the increase in the radius from the nenkante in to the outer edge.
  • the key grinding tray segment With its shape, the key grinding tray segment represents an inverted cake-like shape.
  • a press recess for attaching a press for the replacement process is provided on the outer edge of the key grinding table segment.
  • a pressing tool can be attached by means of this press recess and the key grinding table segment can be pressed in the direction of the center point of the grinding table.
  • the press tool can be placed between the press recess and the edge of the main body of the grinding table.
  • the press 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 crushed ground material from being pressed into the press recess as far as possible.
  • the expression “in operation” can be understood to mean an operational roller mill. This means in particular that the grinding table is built up at least on the mill side, that is, a grinding track with a damming edge is present.
  • the invention also relates to a grinding table segment system for a grinding path of a grinding table of a roller mill with a plurality of grinding table segments which each have a nenkante in and an outer edge.
  • the two edges are connected by two connecting edges.
  • the length of the inside edges is less than the length the outer edge.
  • the grinding table segment system further comprises at least one key grinding table segment according to the invention and at least one compensating grinding table segment which is arranged next to the key grinding table segment.
  • 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.
  • Grinding table segments can also be referred to as grinding plates.
  • Two equalizing grinding table segments are preferably provided in an arrangement to the left and right of the key grinding table segment.
  • the two compensating grinding table segments can be designed essentially mirror-symmetrically to an axis on the radius of the grinding table through the key grinding table segment.
  • This axis can, for example, be the axis of symmetry on the radius of the key grinding table segment.
  • Such a construction makes it possible in a simple manner to achieve the size of one or more standard grinding table segments with a key grinding table segment and two compensating grinding table segments. This is further simplified by the provision of mirror-symmetrical compensating grinding plate segments.
  • two compensating grinding plate segments with the key grinding plate segment are the size of one, two or three standard grinding plate segments.
  • the grinding plate segments can also be designed as equal grinding plate segments. In this case it is provided that several key grinding plate segments are present. It is preferred here that the same number of equalizing grinding plate segments and key grinding plate segments are provided. In other words, a key grinding tray segment is followed by a compensating grinding tray segment. In this respect, standard grinding segments, as described above, are no longer used.
  • the compensating grinding plate segments as a combination, as described in the previous embodiment, of standard grinding plate segments with balancing grinding plate segments, provided they are made in one piece. In this case it is only necessary to have two different types of Mahltellerseg.
  • Another advantage results from the fact that several key grinding table segments are provided, so that it is irrelevant in which position the grinding table has come to a standstill in relation to the grinding rollers arranged above. Otherwise, care must be taken that the key grinding table segment does not come to rest in the area of a roller, since dismantling is then complicated and ideally the bowl must be turned further.
  • the grinding table segments that is to say the standard grinding table segments, the key grinding table segment or segments and / or the compensating grinding table segments can be fastened to the grinding table by means of a one-piece or multi-part clamping ring.
  • the clamping ring on the inner circumference of the grinding track i.e. on the inner edge of the grinding lersegmente abuts and so presses the grinding table segments outward against an edge of the grinding table base body.
  • the invention also relates to a roller mill with a grinding table, the Mahltel ler having a grinding table segment system according to the invention.
  • Such a roller mill has the advantage that when the grinding track, that is to say the individual grinding table segments, are replaced and new ones are installed, this can be carried out significantly more quickly than with conventional grinding table segments. This is due to the fact that the key grinding table segment can be removed very easily from the grinding track and it is hardly necessary for the ground material that has accumulated on the edge between the key grinding table segment and the neighboring segments to close before the key grinding table segment is removed remove.
  • the invention relates to a method for removing a Mahltel lersegmentes from a grinding path of a grinding table of a roller mill with a grinding table segment system according to the invention. It is provided that the clamping ring and the retaining ring are removed from the grinding table first.
  • the press recess of the key grinding table segment according to the invention is now open. Now a press tool can be placed on the press recess and the key grinding table segment can be pressed towards the center of the grinding table.
  • the main body of the grinding table serves as a counter-bearing.
  • Fig. 1 is a schematic plan view of a grinding table with a grinding track accordingly a first embodiment
  • FIG. 2 shows a schematic plan view of a grinding table with a grinding path according to a second embodiment
  • FIG 3 shows a sectional view through a grinding table with a grinding track.
  • Fig. 1 is a schematic representation of a plan view of a grinding table 4 with egg ner grinding track 5 according to a first embodiment.
  • the grinding track 5 is built up from a key grinding plate segment 10, two mirror-symmetrically shaped compensation grinding plate segments 11 and ten standard grinding plate segments 12.
  • the key grinding table segment 10 has an outer edge 31, an inner edge 32 and two lateral connecting edges 33.
  • the standard grinding table 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 table segment 10 according to the invention has a shorter length than its inner edge 32. As a result, the key grinding table segment 10 can be pushed inward in the direction of the grinding table center 6.
  • this offers the advantage that by sliding the key grinding table segment 10 inward, the free space between the connecting edges 33 of the key grinding table segment 10 and the adjacent connecting edges 53 of the compensating grinding table segments 11 is increased. This also means that ground material pressed into it cannot prevent it from being pushed inwards.
  • the key grinding plate segment 10 is the size of two normal standard grinding plate segments 12. So standard elements can be used for the rest of the grinding path.
  • Fig. 2 an alternative embodiment of the grinding table 5 is shown. In the following, only the differences from the embodiment of FIG. 1 will be discussed.
  • 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 each arranged alternately on the grinding table 5.
  • the standard grinding plate segments 12 are dispensed with here. In contrast to the embodiment of FIG. 1, however, only two different Mahltel lersegmentart are used. This simplifies storage.
  • Another advantage of this embodiment is that the first key grinding table segment 10, which is removed by being pushed inward in the direction of the grinding table center 6, can be freely selected. This is particularly interesting because, in the worst case, when the mill is stopped, a key grinding plate segment 10 could come to lie exactly under the roller, so that the mill would have to be started up again. In the embodiment according to FIG. 2, this is clearly unlikely, since the pitch of the grinding plate segments is significantly greater than the number of grinding rollers.
  • FIG 3 shows a sectional view through a grinding table 4.
  • a press recess 15 is shown in the right area of the key grinding table segment 10 ge. This is covered by a storage edge 26.
  • the position of the retaining edge 26 ensures that hardly any, or at least very little, material to be ground gets into the press recess 15 during operation, that is to say during the grinding processes.
  • the key grinding table segment 10 itself is arranged and fastened in a recess in the grinding table body 7 by means of a clamping ring 20.
  • the key grinding plate segment 10 is used in this case, then the clamping ring 20 is attached. This is attached by means of 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 further grinding table segments 11, 12 are fastened in a similar manner before or afterwards. When removing, proceed in reverse order. In this case, it is essential that the key grinding plate segment 10 is removed first before the other grinding plate segments 11, 12.
  • the screw 21 is first loosened, since the clamping ring 20 can be removed with it. Simultaneously, before or after, the storage ring 26 is also dismantled.
  • a pressing tool can then be used in the press recess 15 and so the key grinding table segment 10 can be pressed into the space in which the clamping ring 20 was previously located. After the key grinding tray segment 10 has been removed, the other Mahltel lersegmente 11, 12 can also be removed relatively easily.
  • the grinding table segment system according to the invention and the method according to the invention it is possible to significantly simplify the replacement of grinding table segments of a grinding track of a roller mill and to carry it out in a shorter time.

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)

Abstract

L'invention concerne un segment de plaque de fraisage à clé remplaçable pour une trajectoire de fraisage d'une plaque de fraisage d'un laminoir, ayant une forme annulaire ayant une circonférence externe et une circonférence interne autour d'un centre. La longueur du bord intérieur du segment de plaque de fraisage à clé se trouvant plus près du centre est supérieure à la longueur du bord extérieur se trouvant à distance du centre. L'invention concerne en outre un segment de plaque de fraisage, un laminoir et un procédé de remplacement de segments de plaque de fraisage.
EP20720400.9A 2020-04-16 2020-04-16 Système de segments de plateau de broyage et procédé correspondant Active EP4135901B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2020/060674 WO2021209133A1 (fr) 2020-04-16 2020-04-16 Segment de plaque de fraisage à clé, système de segment de plaque de fraisage et procédé associé

Publications (2)

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

Family

ID=70333937

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20720400.9A Active EP4135901B1 (fr) 2020-04-16 2020-04-16 Système de segments de plateau de broyage et procédé correspondant

Country Status (10)

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

Family Cites Families (27)

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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 (fr) * 1988-04-27 1989-11-14
US20090011913A1 (en) * 2007-07-02 2009-01-08 Babcock Power Inc. Tire for material treatment system
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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
JP2023529059A (ja) 2023-07-07
WO2021209133A1 (fr) 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
EP4135901B1 (fr) 2024-05-29
AU2020442474B2 (en) 2024-02-15
US12415187B2 (en) 2025-09-16
CN115515716A (zh) 2022-12-23

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