EP3801910B1 - Roller press - Google Patents
Roller press Download PDFInfo
- Publication number
- EP3801910B1 EP3801910B1 EP19712159.3A EP19712159A EP3801910B1 EP 3801910 B1 EP3801910 B1 EP 3801910B1 EP 19712159 A EP19712159 A EP 19712159A EP 3801910 B1 EP3801910 B1 EP 3801910B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- recesses
- wear
- roller press
- studs
- wear protection
- 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.)
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- 239000000463 material Substances 0.000 claims description 29
- 239000002347 wear-protection layer Substances 0.000 claims description 23
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 238000003754 machining Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 description 7
- 238000005452 bending Methods 0.000 description 3
- 229910017052 cobalt Inorganic materials 0.000 description 3
- 239000010941 cobalt Substances 0.000 description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 240000003517 Elaeocarpus dentatus Species 0.000 description 1
- 206010041662 Splinter Diseases 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- -1 kimberlite Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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
- B02C4/283—Lateral sealing shields
-
- 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
-
- 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
- B02C4/30—Shape or construction of rollers
- B02C4/305—Wear resistant rollers
-
- 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
- This roller press is used in particular for crushing material, especially highly abrasive material such. B. ore, cement clinker, slag, kimberlite, coal or ceramic base materials.
- Such a roller press for high-pressure comminution is also referred to as a high-pressure roller mill.
- the invention also relates to roller presses for compacting or briquetting material.
- processing material e.g. B. when crushing brittle, granular material, high forces and the roller surfaces are heavily stressed, so that the wear protection of the roller surfaces is of particular importance in practice.
- cylindrical hard metal pins or nub bolts are used, which are embedded "hedgehog-like" in corresponding blind holes of the roll body and together with the pressed ground material form an autogenous wear protection layer (cf. EP 0 516 952 A1 ).
- a wear protection layer of individual wear protection elements at least in a first wear zone, which relates in particular to the area of the minimum gap width of the roll gap, in which particularly high forces occur.
- It can be a variety of plate-shaped wear protection elements (tiles) act z. B. from a wear-resistant composite material, z. B. made of hard metal, and are fixed in a dense arrangement next to each other flat on the base plate, z. B. by soldering.
- delimitation plates or cheek plates with a tile-like, wear-resistant surface has basically proven itself in practice. With high forces in particularly critical areas, however, individual parts of the tiles can splinter off and this in turn offers points of attack for further breakouts, so that solutions with a tile-like structure can fundamentally be further developed. - This is where the invention comes in.
- Limiting elements can also be provided in which pin-like wear protection elements are slidably arranged in sleeve-shaped holders, so that the wear protection elements are slidably arranged in the holders, e.g. B. to be able to adjust the supernatant of the wear protection element beyond the bracket.
- the DE 10 2014 100 199 B3 describes a roller press with lateral guide walls, via which a friction-reducing substance is to be fed in solid, liquid or gaseous consistency, which reduces the wear caused by the material to be ground on the lateral guide walls.
- the invention is based on the object of creating a roller press of the type described in the introduction, in which damage to the wear protection layer in the area of the lateral boundary plates or cheek plates is reliably avoided.
- the wear protection layer in the area of the cheek plates should be characterized by a particularly high durability and consequently an optimal wear protection.
- such a boundary plate is to be made available.
- the invention is based on the finding that the splintering that may occur in boundary plates with a tile-like surface can be reliably avoided in a simple manner if a wear layer is realized from a large number of pin-like wear protection elements, with the pins not lying against one another laterally, but each independently in a variety of recesses, z. B. holes, are fully supported and thus stabilized. Since each individual pin is supported in a single hole over the full circumference and full length, there is no risk of it splintering and there are therefore no points of attack for further destruction of the surface. This structure reliably prevents the destruction of an individual element from progressing.
- This configuration according to the invention avoids any bending stresses on the pins and this in turn means that pins made of particularly hard material can be used since they do not have to withstand any bending loads.
- a particularly close arrangement of the pins can be implemented, ie the pins are arranged as close together as possible with the smallest possible spacing in order to obtain a wear protection layer that is as full-surface as possible from these pins.
- the anti-wear pins are consequently used in the case of the lateral limiting plates according to the invention on the basis of different considerations and in a different arrangement than in the case of conventional "studlining" surfaces of press rolls.
- the recesses on the one hand and the pins on the other hand are preferably of cylindrical design.
- the recesses can, for. B. be formed as holes and preferably as blind holes.
- the base plate is made of a ductile metal, e.g. B. made of steel.
- the recesses are preferably integrated directly in one piece in such a base plate, e.g. B. by machining, preferably by drilling, milling or the like.
- the anti-wear pins are preferably made of a wear-resistant multi-phase material, e.g. B. made of hard metal.
- This is a non-oxidic material based on hard material in the form of an intermetallic (intermediate) phase consisting of a hard material and a binder phase.
- Carbides preferably tungsten carbide (WC), or alternatively nitrides or borides are used as hard materials.
- Co Co is used as the most important binder or binder phase.
- pins with a particularly high degree of hardness can be used, since the pins are not subject to any bending stress for the reasons described.
- the pins are completely inserted into the recesses (preferably precisely matched in diameter) and held in the recesses in a form-fitting and/or friction-locked manner by the pins z. B. are pressed into the recesses.
- the pins are preferably arranged particularly densely on the base plate. It follows from this that the recesses surrounding the recesses and the individual recesses of a separating separating web are designed to be particularly narrow in the area of the minimum thickness. In this case, the minimum thickness can be less than half the diameter of the recesses themselves.
- the recesses and accordingly the pins can, for. B. a diameter of 6 mm to 20 mm, z. 10mm to 20mm, e.g. B. 14 mm to 16 mm.
- the separating webs can have a minimum thickness of less than 8 mm, preferably less than 6 mm.
- the pins as pin-shaped anti-wear elements, have a length (ie initial length) which is greater than that Diameter of the pins, preferably more than 1.5 times the diameter, z. B. more than double.
- the length of the pins is z. B. 10mm to 50mm, preferably 20mm to 40mm. With a diameter of 10 mm, the length z. B. 16 mm or with a diameter of 35 mm z. B. be 53 mm.
- the recesses z. B. are designed as holes, preferably have a flat or level bottom. Furthermore, it is expedient if the pins also have a base which faces away from the wear surface and is likewise flat or even.
- this embodiment is limited only to a spatially limited, first wear zone that covers the area of the roll gap with a minimum gap width.
- it can be z. B. around a first wear zone with a width of 50 mm to 300 mm, z. B. 100 mm to 200 mm and with a height of 100 mm to 500 mm, z. B. act 150 mm to 350 mm.
- the limiting plate preferably has a second (larger) wear zone which covers the area outside of said first wear zone.
- This second wear zone which in particular covers the area above the first wear zone in the gap that widens counter to the direction of rotation, can e.g. B. be equipped with conventional wear protection elements in the embodiment as a plate-shaped tiles or with a flat build-up weld.
- Plate-shaped tiles means plate-shaped wear protection elements whose diameter or width is greater than their height or thickness. It can in particular be polygonal tiles. However, these tiles are in the second Wear zone not individually arranged in individual recesses, but flat next to each other in a flat depression of the base plate.
- a base plate made in one piece, in which on the one hand one or more flat depressions for the plate-shaped tiles in the area of the second wear zone and on the other hand a large number of recesses according to the invention for the pins are incorporated, e.g. B. by machining.
- the delimiting plates described which preferably (each) have a base plate manufactured in one piece and the wear protection layer, are detachably fastened to carrier plates or mounting plates for the purpose of fastening.
- the press rollers and the front side of the rollers are consequently each provided with a support plate which, for. B. is attached to the machine frame and itself is not made of wear-resistant or wear-resistant material.
- the boundary plates according to the invention are releasably attached to the wear layer on these support plates, e.g. B. by means of screws or the like.
- the carrier plates or mounting plates can preferably be made larger than the actual delimiting plates that form the wear protection plates.
- the object of the invention is also a delimiting plate for a roller press of the type described.
- the delimiting plate according to the invention which is equipped with the pin-shaped wear protection elements, is also independently protected. All variants and options that are explained in connection with the roller press can consequently also be implemented with the isolated boundary plates placed under protection.
- the material feed area of a roller press is shown schematically in a highly simplified manner.
- B. can be used for the crushing of material and is also referred to as a high pressure roller press or material bed roller mill.
- the roller press has two press rollers 1, which are rotatably mounted in opposite directions in a machine frame, not shown.
- the press rollers 1 are only indicated.
- the material to be processed is introduced from above, z. B. in the sense of a gravity feed or by means of a screw feeder. Details are not shown.
- the invention relates in particular to the lateral boundary plates 3, which are arranged in such a roller press to the side of the press rollers 1 and consequently limit the nip 2 on the front side of the rollers.
- delimiting plates 3 In 1 only one of these delimiting plates 3 is shown, such a delimiting plate 3 being fastened to a carrier plate 4 .
- carrier plates 4 are in turn fastened to the machine frame or machine frame of the roller press, not shown, so that the boundary plates 3 are replaceable, because the boundary plates 3 are subject to considerable wear during operation of the rollers.
- the support plate 4 1 attached boundary plate 3 is in turn in the Figures 2a, 2b and 2c shown in different views.
- the delimiting plate 3 which in practice is also referred to as the "cheek plate"
- the wear protection layer 6 has a first wear zone 6a, which in particular covers the area of the minimum gap width of the roller gap 2, since particularly high forces and thus particularly high stress with corresponding wear occur in this area.
- the wear-protection layer 6 has a second wear zone 6b, which relates in particular to the area above the first wear zone 6a, in which the roller gap widens in a funnel shape counter to the direction of rotation of the rollers.
- this second wear zone 6b includes the two outer areas on the side of the first wear zone 6a, since lower forces also occur in this area.
- the wear protection layer 6 is formed in a fundamentally known manner by individual wear protection elements made of a wear-resistant material, which are designed in the form of plates as tiles 7.
- the base plate 5 a flat depression 8, in which a plurality of such adjacent tiles 7 are inserted, so that in the area of the second wear zone 6b a flat wear protection layer is formed from these tiles 7.
- These tiles 7 are z. B. made of carbide.
- the wear protection elements in the region of the first wear zone 6a are designed as pin-shaped wear protection elements and consequently as wear protection pins or pins 9 .
- These preferably have a length L that is greater than the diameter D of the pins 9, preferably more than twice the diameter D.
- the base plate 5 has a multiplicity of individual recesses 10 worked into the base plate in the first wear zone 6a.
- the pins 9 are now individually inserted with their full length L into these recesses 10 in such a way that the pins 9 do not protrude beyond the recesses 10 but are inserted flush into the recesses 10 in the exemplary embodiment. In the exemplary embodiment shown, this is realized in that the length L of the pins corresponds (essentially) to the depth T of the recesses 10 .
- the pins 9 can (also) be made of hard metal.
- the base plate 5 is made of a ductile metal, e.g. B. made of steel.
- the base plate 5 is made in one piece, i. H.
- Both the flat recess 8 and the individual recesses 10 are integrated directly into the base plate, z. B. by machining.
- the cylindrical recesses 10 for the pins 9 can, for. B. be formed as holes, preferably with a flat bottom.
- the design of the base plate 5 results in particular from a comparative consideration of the Figures 2a, 2b and 2c with the Figures 3a, 3b and 3c , because the Figures 2a, 2b, 2c show the finished boundary plate 3 with base plate 5 and wear protection layer 6 attached thereto Figures 3a, 3b and 3c only the base plate 5 without the wear protection layer, ie without the tiles and the pins.
- the recesses 10 in the base plate 5 are separated from one another by separating webs 11, these separating webs each surrounding the recess 10 over the full or part of the circumference.
- the pins 9 are now inserted into the recesses 10 in such a way that the pins 9 do not protrude beyond the separating webs 11 and out of the recesses, but rather the front surfaces of the pins 9 are preferably flush with the separating webs 10, so that in the area of the first wear zone 6a a uniform, flat surface of the wear protection layer is formed.
- the recesses 10 and thus also the pins 9 are arranged very close together, ie the separating webs are relatively narrow in the area of their minimum thickness, they have a minimum thickness b that is less than half the diameter d of the recesses 10 is.
- the tiles 7 or the flat recess 8 are also dimensioned such that the tiles 7 end flush with their surface with the flat recess 8 or the border of the flat recess 8 and also flush with the pins 9 , so that overall a uniform wear protection layer 6 is realized with a substantially flat surface.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Crushing And Grinding (AREA)
Description
Die Erfindung betrifft eine Walzenpresse mit zwei drehbar gelagerten Presswalzen, zwischen denen ein Walzenspalt gebildet ist, in den das zu verarbeitende Material geführt wird,
- wobei der Walzenspalt walzenstirnseitig (bzw. seitlich) mittels Begrenzungsplatten begrenzt wird, wobei die Begrenzungsplatten jeweils eine Grundplatte und eine an der Grundplatte befestigte Verschleißschutzschicht aufweisen,
- wobei die Verschleißschutzschicht zumindest in einer ersten Verschleißzone (mit hoher Beanspruchung) von einzelnen Verschleißschutzelementen gebildet wird, die (zumindest bereichsweise) aus einem verschleißbeständigen Material mit gegenüber der Grundplatte größerer Härte bestehen.
- wherein the roll gap is delimited on the face side (or laterally) of the rolls by means of delimiting plates, the delimiting plates each having a base plate and a wear protection layer fastened to the base plate,
- wherein the wear-protection layer is formed at least in a first wear zone (with high stress) by individual wear-protection elements which (at least in some areas) consist of a wear-resistant material with greater hardness than the base plate.
Diese Walzenpresse dient insbesondere der Zerkleinerung von Material, insbesondere von stark abrasivem Material, z. B. Erz, Zementklinker, Schlacke, Kimberlit, Kohle oder Keramikgrundstoffe. Eine solche Walzenpresse für die Hochdruckzerkleinerung wird auch als Gutbettwalzenmühle bezeichnet. Die Erfindung betrifft aber auch Walzenpressen für die Kompaktierung oder Brikettierung von Material. Stets treten bei der Verarbeitung von Material, z. B. bei der Zerkleinerung von sprödem, körnigem Material, hohe Kräfte auf und die Walzenoberflächen werden stark beansprucht, so dass dem Verschleißschutz der Walzenoberflächen in der Praxis eine besondere Bedeutung zukommt. So werden für den Verschleißschutz der Walzenoberflächen z. B. zylindrische Hartmetallstifte bzw. Noppenbolzen verwendet, die "igelartig" in entsprechende Sacklochbohrungen des Walzenkörpers eingelagert werden und zusammen mit dem eingepressten Mahlgut eine autogene Verschleißschutzschicht bilden (vgl.
Aber nicht nur die Oberflächen der Presswalzen, sondern auch die den Walzenspalt seitlich begrenzenden Begrenzungsplatten unterliegen hohen Beanspruchungen und einem starken Verschleiß, so dass sie mit einer Verschleißschutzschicht versehen werden. Solche Begrenzungsplatten werden in der Praxis auch als "cheek plates" bezeichnet. Sie begrenzen den sich in der Drehrichtung der Presswalzen bzw. in der Förderrichtung trichterförmig verjüngenden Walzenspalt seitlich bzw. walzenstirnseitig. Eine Walzenpresse mit solchen seitlichen Begrenzungsplatten bzw. Mahlgutführungsblechen ist z. B. aus der
In der Praxis wird bei einer solchen Begrenzungsplatte z. B. eine durchgehende Verschleißschutzschicht durch Auftragsschweißung oder mit anderen Mitteln auf die Grundplatte aufgebracht bzw. an dieser befestigt. Außerdem ist es aus der Praxis bekannt, zumindest in einer ersten Verschleißzone, die insbesondere den Bereich der minimalen Spaltweite des Walzenspaltes betrifft, in dem besonders hohe Kräfte auftreten, eine Verschleißschutzschicht aus einzelnen Verschleißschutzelementen vorzusehen. Dabei kann es sich um eine Vielzahl von plattenförmigen Verschleißschutzelementen (Kacheln) handeln, die z. B. aus einem verschleißbeständigen Verbundmaterial, z. B. aus Hartmetall, gefertigt sind und die in einer dichten Anordnung nebeneinander flächig an der Grundplatte befestigt werden, z. B. durch Löten. Der Einsatz solcher Begrenzungsplatten bzw. cheek plates mit einer kachelartigen, verschleißbeständigen Oberfläche hat sich in der Praxis grundsätzlich bewährt. Bei hohen Kräften in besonders kritischen Bereichen kann es jedoch zu einem Absplittern einzelner Teile der Kacheln kommen und dieses bietet wiederum Angriffspunkte für weitere Ausbrüche, so dass Lösungen mit kachelartiger Struktur grundsätzlich weiterentwicklungsfähig sind. - Hier setzt die Erfindung ein.In practice, with such a boundary plate z. B. applied a continuous wear protection layer by build-up welding or other means on the base plate or attached to it. In addition, it is known from practice to provide a wear protection layer of individual wear protection elements at least in a first wear zone, which relates in particular to the area of the minimum gap width of the roll gap, in which particularly high forces occur. It can be a variety of plate-shaped wear protection elements (tiles) act z. B. from a wear-resistant composite material, z. B. made of hard metal, and are fixed in a dense arrangement next to each other flat on the base plate, z. B. by soldering. The use of such delimitation plates or cheek plates with a tile-like, wear-resistant surface has basically proven itself in practice. With high forces in particularly critical areas, however, individual parts of the tiles can splinter off and this in turn offers points of attack for further breakouts, so that solutions with a tile-like structure can fundamentally be further developed. - This is where the invention comes in.
Im Übrigen ist aus der
Die
Aus der
Der Erfindung liegt die Aufgabe zugrunde, eine Walzenpresse der eingangs beschriebenen Art zu schaffen, bei der im Bereich der seitlichen Begrenzungsplatten bzw. cheek plates Beschädigungen der Verschleißschutzschicht zuverlässig vermieden werden. Die Verschleißschutzschicht im Bereich der cheek plates soll sich durch eine besonders hohe Haltbarkeit und folglich einen optimalen Verschleißschutz auszeichnen. Außerdem soll eine solche Begrenzungsplatte zur Verfügung gestellt werden.The invention is based on the object of creating a roller press of the type described in the introduction, in which damage to the wear protection layer in the area of the lateral boundary plates or cheek plates is reliably avoided. The wear protection layer in the area of the cheek plates should be characterized by a particularly high durability and consequently an optimal wear protection. In addition, such a boundary plate is to be made available.
Zur Lösung dieser Aufgabe lehrt die Erfindung bei einer gattungsgemäßen Walzenpresse der eingangs beschriebenen Art, dass die Verschleißschutzelemente als stiftförmige Verschleißschutzelemente und folglich als Stifte (d. h. Verschleißschutzstifte) ausgebildet sind,
- dass die Grundplatte in der ersten Verschleißzone eine Vielzahl von einzelnen, in die Grundplatte eingearbeiteten (lediglich frontseitig offenen) Ausnehmungen aufweist und
- dass in die Ausnehmungen (bzw. in jede Ausnehmung) jeweils ein einzelner Verschleißschutzstift mit seiner vollen Länge derart eingesteckt ist, dass die Stifte nicht über die Ausnehmungen heraus vorkragen. Besonders bevorzugt sind die Stifte (im Wesentlichen) bündig fluchtend in die Ausnehmungen eingesetzt. Dieses lässt sich z. B. dadurch realisieren, dass die Stifte eine Länge aufweisen, die (im Wesentlichen) der Tiefe der Ausnehmungen entspricht. Grundsätzlich besteht die Möglichkeit, dass sämtliche Ausnehmungen dieselbe Tiefe aufweisen und dann ist es zweckmäßig, dass auch sämtliche Stifte dieselbe Länge aufweisen. Es liegt jedoch ebenso im Rahmen der Erfindung, dass die Ausnehmungen eine unterschiedliche Tiefe aufweisen und in diesem Fall ist es zweckmäßig, wenn die Längen der Stifte an die jeweilige Tiefe der Ausnehmung angepasst ist, so dass insgesamt die bevorzugte bündig fluchtende Anordnung realisiert wird. Bevorzugt sind die Ausnehmungen durch Trennstege voneinander getrennt, welche die jeweilige Ausnehmung vollumfänglich oder teilumfänglich umgeben. Die Stifte sind mit ihrer vollen Länge derart in die Ausnehmungen eingesteckt, dass die Stifte nicht über die Trennstege hinaus aus den Ausnehmungen vorkragen. Bevorzugt ist vorgesehen, dass die Stifte (mit ihren Vorderflächen) bündig mit den Trennstegen abschließen, so dass die Stifte bzw. deren Vorderflächen und die
- that the base plate in the first wear zone has a large number of individual recesses worked into the base plate (only open at the front) and
- that in each case a single anti-wear pin is inserted with its full length into the recesses (or into each recess) in such a way that the pins do not protrude beyond the recesses. Particularly preferably, the pins are (essentially) inserted flush into the recesses. This can e.g. B. realized in that the pins have a length that (substantially) corresponds to the depth of the recesses. In principle, there is the possibility that all the recesses have the same depth and it is then expedient that all the pins also have the same length. However, it is also within the scope of the invention for the recesses to have different depths, and in this case it is expedient if the lengths of the pins are adapted to the respective depth of the recess, so that the preferred flush alignment arrangement is achieved overall. The recesses are preferably separated from one another by separating webs which surround the respective recess over the entire or part of its circumference. The pins are inserted into the recesses with their full length in such a way that the pins do not protrude beyond the separating webs out of the recesses. It is preferably provided that the pins (with their front surfaces) are flush with the separating webs, so that the pins or their front surfaces and the
Oberflächen der Trennstege eine fluchtende und folglich einheitlich, ebene Oberfläche bilden.Surfaces of the dividers form a flush and consequently uniform, flat surface.
Die Erfindung geht dabei von der Erkenntnis aus, dass sich die bei Begrenzungsplatten mit einer kachelartigen Oberfläche gegebenenfalls auftretenden Absplitterungen auf einfache Weise zuverlässig vermeiden lassen, wenn eine Verschleißschicht aus einer Vielzahl von stiftartigen Verschleißschutzelementen realisiert wird, wobei die Stifte jedoch nicht seitlich gegeneinander anliegen, sondern jeweils eigenständig in einer Vielzahl von Ausnehmungen, z. B. Bohrungen, vollständig abgestützt und damit stabilisiert sind. Da jeder einzelne Stift in einer einzelnen Bohrung über den vollen Umfang und die volle Länge abgestützt ist, besteht nicht die Gefahr des Absplitterns und damit bilden sich auch keine Angriffspunkte für weitere Zerstörungen der Fläche. So wird ein Fortschreiten einer Zerstörung eines einzelnen Elementes durch diese Struktur zuverlässig vermieden.The invention is based on the finding that the splintering that may occur in boundary plates with a tile-like surface can be reliably avoided in a simple manner if a wear layer is realized from a large number of pin-like wear protection elements, with the pins not lying against one another laterally, but each independently in a variety of recesses, z. B. holes, are fully supported and thus stabilized. Since each individual pin is supported in a single hole over the full circumference and full length, there is no risk of it splintering and there are therefore no points of attack for further destruction of the surface. This structure reliably prevents the destruction of an individual element from progressing.
Bei der Ausgestaltung der stiftartigen Verschleißschutzelemente (Stifte) kann auf grundsätzlich bekannte Erkenntnisse zurückgegriffen werden. Denn solche Verschleißschutzstifte, die auch als "Studs" bezeichnet werden, kommen in der Praxis seit langem im Bereich der Walzenoberflächen von Presswalzen zur Zerkleinerung von sprödem Mahlgut zum Einsatz. Im Bereich solcher Walzenoberflächen kommt es jedoch wesentlich darauf an, dass die Stifte über den Grundkörper der Walze hinaus herausragen, so dass sich durch das zu zerkleinernde Material im Bereich der Zwischenräume ein autogener Verschleißschutz ausbildet. Demgegenüber kommt es erfindungsgemäß im Bereich der seitlichen Begrenzungsplatte nicht auf die Ausbildung eines solchen autogenen Verschleißschutzes an, so dass die Stifte nicht über die sie begrenzende Oberfläche hinausragen. Durch diese erfindungsgemäße Ausgestaltung werden jegliche Biegebelastungen der Stifte vermieden und dieses führt wiederum dazu, dass Stifte aus besonders hartem Material zum Einsatz kommen können, da sie keinen Biegebelastungen standhalten müssen. Außerdem kann - da kein autogener Verschleißschutz angestrebt wird - eine besonders enge Anordnung der Stifte realisiert werden, d. h. die Stifte werden mit möglichst geringem Abstand möglichst dicht beieinander angeordnet, um eine möglichst vollflächige Verschleißschutzschicht aus diesen Stiften zu erhalten. Die Verschleißschutzstifte werden bei den erfindungsgemäßen seitlichen Begrenzungsplatten folglich aufgrund anderer Überlegungen und in anderer Anordnung eingesetzt, als bei üblichen "Studlining" Oberflächen von Presswalzen.In the design of the pin-like wear protection elements (pins), it is possible to fall back on fundamentally known findings. Because such wear protection pins, which are also referred to as "studs", have been used in practice for a long time in the area of the roll surfaces of press rolls for the comminution of brittle material to be ground. In the area of such roller surfaces, however, it is essential that the pins protrude beyond the base body of the roller, so that the material to be shredded in the area of the gaps forms an autogenous protection against wear. In contrast, according to the invention, the formation of such an autogenous protection against wear is not important in the area of the lateral boundary plate, so that the pins do not protrude beyond the surface bounding them. This configuration according to the invention avoids any bending stresses on the pins and this in turn means that pins made of particularly hard material can be used since they do not have to withstand any bending loads. In addition, since autogenous wear protection is not sought, a particularly close arrangement of the pins can be implemented, ie the pins are arranged as close together as possible with the smallest possible spacing in order to obtain a wear protection layer that is as full-surface as possible from these pins. The anti-wear pins are consequently used in the case of the lateral limiting plates according to the invention on the basis of different considerations and in a different arrangement than in the case of conventional "studlining" surfaces of press rolls.
Die Ausnehmungen einerseits und die Stifte andererseits sind bevorzugt zylindrisch ausgebildet. Die Ausnehmungen können z. B. als Bohrungen und bevorzugt als Sacklochbohrungen ausgebildet sein.The recesses on the one hand and the pins on the other hand are preferably of cylindrical design. The recesses can, for. B. be formed as holes and preferably as blind holes.
Es ist vorteilhaft, wenn die Grundplatte aus einem duktilen Metall, z. B. aus Stahl, gefertigt ist. Bevorzugt sind die Ausnehmungen unmittelbar einstückig in eine solche Grundplatter integriert, z. B. durch spanabhebende Bearbeitung, bevorzugt durch Bohren, Fräsen oder dergleichen.It is advantageous if the base plate is made of a ductile metal, e.g. B. made of steel. The recesses are preferably integrated directly in one piece in such a base plate, e.g. B. by machining, preferably by drilling, milling or the like.
Die Verschleißschutzstifte sind bevorzugt aus einem verschleißbeständigen mehrphasigen Werkstoff, z. B. aus Hartmetall, gefertigt. Dabei handelt es sich um einen nicht oxydischen Werkstoff auf Hartstoffbasis in Form einer intermetallischen (intermediären) Phase, die aus einem Hartstoff und einer Bindephase besteht. Als Hartstoffe kommen insbesondere Karbide, bevorzugt Wolframkarbid (WC) oder alternativ auch Nitride oder Boride zum Einsatz. Als wichtigstes Bindemittel bzw. Bindephase wird Kobalt (Co) eingesetzt. Zur Herstellung der Hartmetallstifte wird in der Regel die Pulvermischung aus den Hartstoffen, z. B. Karbiden, und aus dem Bindemetall und gegebenenfalls einem organischen Presshilfsmittel verpresst, und anschließend z. B. durch Sintern oder heißisostatisches Pressen konsolidiert. Besonders interessant ist im Rahmen der Erfindung, dass Stifte mit besonders hoher Härte eingesetzt werden können, da die Stifte aus den beschriebenen Gründen keiner Biegebelastung unterliegen. Damit können z. B. Stifte aus einem Hartmetall mit besonders geringem Bindemittelanteil, z. B. besonders geringem Kobaltanteil, verwendet werden. Der Anteil des Bindemittels bzw. der Bindephase, z. B.der Kobaltanteil, kann z. B. weniger als 12 Gew.%, insbesondere weniger als 10 Gew.%, z. B. weniger als 6 Gew.% betragen.The anti-wear pins are preferably made of a wear-resistant multi-phase material, e.g. B. made of hard metal. This is a non-oxidic material based on hard material in the form of an intermetallic (intermediate) phase consisting of a hard material and a binder phase. Carbides, preferably tungsten carbide (WC), or alternatively nitrides or borides are used as hard materials. Cobalt (Co) is used as the most important binder or binder phase. To produce the hard metal pins, the powder mixture from the hard materials, e.g. B. carbides, and from the binder metal and optionally pressed an organic pressing agent, and then z. B. consolidated by sintering or hot isostatic pressing. It is particularly interesting within the scope of the invention that pins with a particularly high degree of hardness can be used, since the pins are not subject to any bending stress for the reasons described. This allows e.g. B. pins made of a hard metal with a particularly low binder content, z. B. particularly low cobalt content can be used. The proportion of the binder or the binder phase, e.g. B.der cobalt content, z. B. less than 12% by weight, in particular less than 10% by weight, e.g. B. be less than 6 wt.%.
Die Stifte werden erfindungsgemäß vollständig in die (vorzugsweise im Durchmesser exakt angepassten) Ausnehmungen eingesteckt und in den Ausnehmungen formschlüssig und/oder reibschlüssig gehalten, indem die Stifte z. B. in die Ausnehmungen eingepresst werden. Es besteht jedoch optional die Möglichkeit, die Stifte in den Ausnehmungen zusätzlich stoffschlüssig zu befestigen, z. B. durch Kleben, Löten und/oder Schweißen.According to the invention, the pins are completely inserted into the recesses (preferably precisely matched in diameter) and held in the recesses in a form-fitting and/or friction-locked manner by the pins z. B. are pressed into the recesses. However, there is the option of additionally cohesively attaching the pins in the recesses, e.g. B. by gluing, soldering and / or welding.
Die Stifte werden bevorzugt besonders dicht auf der Grundplatte angeordnet. Daraus folgt, dass die die Ausnehmungen umgebenden und die einzelnen Ausnehmungen von einer trennenden Trennstege im Bereich der minimalen Dicke besonders schmal ausgebildet sind. Dabei kann die minimale Dicke geringer als der halbe Durchmesser der Ausnehmungen selbst sein. Die Ausnehmungen und dementsprechend auch die Stifte können z. B. einen Durchmesser von 6 mm bis 20 mm, z. B. 10 mm bis 20 mm, z. B. 14 mm bis 16 mm aufweisen. Die Trennstege können eine minimale Dicke von weniger als 8 mm, vorzugsweise weniger als 6 mm ausweisen.The pins are preferably arranged particularly densely on the base plate. It follows from this that the recesses surrounding the recesses and the individual recesses of a separating separating web are designed to be particularly narrow in the area of the minimum thickness. In this case, the minimum thickness can be less than half the diameter of the recesses themselves. The recesses and accordingly the pins can, for. B. a diameter of 6 mm to 20 mm, z. 10mm to 20mm, e.g. B. 14 mm to 16 mm. The separating webs can have a minimum thickness of less than 8 mm, preferably less than 6 mm.
Im Übrigen ist vorgesehen, dass die Stifte als stiftförmige Verschleißschutzelemente eine Länge (d. h. Ausgangslänge) aufweisen, die größer ist als der Durchmesser der Stifte, vorzugsweise mehr als das 1,5-fache des Durchmessers beträgt, z. B. mehr als das Doppelte. Die Länge der Stifte beträgt z. B. 10 mm bis 50 mm, vorzugsweise 20 mm bis 40 mm. Bei einem Durchmesser von 10 mm kann die Länge z. B. 16 mm oder bei einem Durchmesser von 35 mm z. B. 53 mm betragen.Furthermore, it is provided that the pins, as pin-shaped anti-wear elements, have a length (ie initial length) which is greater than that Diameter of the pins, preferably more than 1.5 times the diameter, z. B. more than double. The length of the pins is z. B. 10mm to 50mm, preferably 20mm to 40mm. With a diameter of 10 mm, the length z. B. 16 mm or with a diameter of 35 mm z. B. be 53 mm.
Die Ausnehmungen, die z. B. als Bohrungen ausgebildet sind, haben bevorzugt einen flachen bzw. ebenen Boden. Ferner ist es zweckmäßig, wenn auch die Stifte einen der Verschleißoberfläche abgewandten Boden aufweisen, der ebenfalls flach bzw. eben ausgebildet ist.The recesses z. B. are designed as holes, preferably have a flat or level bottom. Furthermore, it is expedient if the pins also have a base which faces away from the wear surface and is likewise flat or even.
Es ist nicht erforderlich, dass die erfindungsgemäße Anordnung mit Ausnehmungen und Stiften über die gesamte Fläche der Begrenzungsplatte realisiert wird. Vielmehr ist in einer bevorzugten Ausführungsform vorgesehen, dass sich diese Ausgestaltung lediglich auf eine räumlich begrenzte, erste Verschleißzone beschränkt, die den Bereich des Walzenspaltes mit minimaler Spaltweite abdeckt. Insofern kann es sich z. B. um eine erste Verschleißzone mit einer Breite von 50 mm bis 300 mm, z. B. 100 mm bis 200 mm und mit einer Höhe von 100 mm bis 500 mm, z. B. 150 mm bis 350 mm handeln. Bevorzugt weist die Begrenzungsplatte eine zweite (größere) Verschleißzone auf, die den Bereich außerhalb der genannten ersten Verschleißzone abdeckt. Diese zweite Verschleißzone, die insbesondere den Bereich oberhalb der ersten Verschleißzone in dem sich entgegen der Drehrichtung aufweitenden Spalt abdeckt, kann z. B. mit herkömmlichen Verschleißschutzelementen in der Ausführungsform als plattenförmige Kacheln oder mit einer flächigen Auftragschweißung ausgerüstet sein. Plattenförmige Kacheln meint plattenförmige Verschleißschutzelemente, deren Durchmesser bzw. Breite größer als deren Höhe bzw. Dicke ist. Es kann sich insbesondere um mehreckige Kacheln handeln. Diese Kacheln sind jedoch in der zweiten Verschleißzone nicht einzeln in einzelnen Ausnehmungen angeordnet, sondern flächig nebeneinander in einer flächigen Vertiefung der Grundplatte. Es wird bevorzugt mit einer einstückig gefertigten Grundplatte gearbeitet, in welche einerseits eine oder mehrere flächige Vertiefungen für die plattenförmigen Kacheln im Bereich der zweiten Verschleißzone und andererseits eine Vielzahl von erfindungsgemäßen Ausnehmungen für die Stifte eingearbeitet sind, z. B. durch spanabhebende Bearbeitung.It is not necessary for the arrangement according to the invention to be implemented with recesses and pins over the entire surface of the boundary plate. Rather, in a preferred embodiment, it is provided that this embodiment is limited only to a spatially limited, first wear zone that covers the area of the roll gap with a minimum gap width. In this respect, it can be z. B. around a first wear zone with a width of 50 mm to 300 mm, z. B. 100 mm to 200 mm and with a height of 100 mm to 500 mm, z. B. act 150 mm to 350 mm. The limiting plate preferably has a second (larger) wear zone which covers the area outside of said first wear zone. This second wear zone, which in particular covers the area above the first wear zone in the gap that widens counter to the direction of rotation, can e.g. B. be equipped with conventional wear protection elements in the embodiment as a plate-shaped tiles or with a flat build-up weld. Plate-shaped tiles means plate-shaped wear protection elements whose diameter or width is greater than their height or thickness. It can in particular be polygonal tiles. However, these tiles are in the second Wear zone not individually arranged in individual recesses, but flat next to each other in a flat depression of the base plate. It is preferred to work with a base plate made in one piece, in which on the one hand one or more flat depressions for the plate-shaped tiles in the area of the second wear zone and on the other hand a large number of recesses according to the invention for the pins are incorporated, e.g. B. by machining.
Es liegt im Übrigen im Rahmen der Erfindung, dass die beschriebenen Begrenzungsplatten, die bevorzugt (jeweils) eine einstückig gefertigte Grundplatte und die Verschleißschutzschicht aufweisen, zum Zwecke der Befestigung lösbar an Trägerplatten bzw. Montageplatten befestigt sind. Bei einer solchen Walzenpresse sind folglich seitlich der Presswalzen bzw. walzenstirnseitig jeweils eine Trägerplatte vorgesehen, die z. B. an dem Maschinenrahmen befestigt ist und die selbst nicht aus verschleißfestem bzw. verschleißbeständigem Material gefertigt ist. An diesen Trägerplatten werden die erfindungsgemäßen Begrenzungsplatten mit der Verschleißschicht lösbar befestigt, z. B. mittels Schrauben oder dergleichen. Die Trägerplatten bzw. Montageplatten können bevorzugt größer ausgebildet sein als die eigentlichen Begrenzungsplatten, die die Verschleißschutzplatten bilden.It is also within the scope of the invention that the delimiting plates described, which preferably (each) have a base plate manufactured in one piece and the wear protection layer, are detachably fastened to carrier plates or mounting plates for the purpose of fastening. In such a roller press, the press rollers and the front side of the rollers are consequently each provided with a support plate which, for. B. is attached to the machine frame and itself is not made of wear-resistant or wear-resistant material. The boundary plates according to the invention are releasably attached to the wear layer on these support plates, e.g. B. by means of screws or the like. The carrier plates or mounting plates can preferably be made larger than the actual delimiting plates that form the wear protection plates.
Gegenstand der Erfindung ist im Übrigen auch eine Begrenzungsplatte für eine Walzenpresse der beschriebenen Art. Das bedeutet, dass die erfindungsgemäße Begrenzungsplatte, die mit den stiftförmigen Verschleißschutzelementen ausgerüstet ist, auch selbständig unter Schutz gestellt wird. Sämtliche Varianten und Optionen, die im Zusammenhang mit der Walzenpresse erläutert sind, lassen sich folglich auch bei den isoliert unter Schutz gestellten Begrenzungsplatten realisieren.The object of the invention is also a delimiting plate for a roller press of the type described. This means that the delimiting plate according to the invention, which is equipped with the pin-shaped wear protection elements, is also independently protected. All variants and options that are explained in connection with the roller press can consequently also be implemented with the isolated boundary plates placed under protection.
Im Folgenden wird die Erfindung anhand von lediglich ein Ausführungsbeispiel darstellenden Zeichnungen näher erläutert. Es zeigen
- Fig. 1
- schematisch stark vereinfacht einen Ausschnitt aus einer Walzenpresse im Bereich einer Begrenzungsplatte,
- Fig. 2a
- eine Begrenzungsplatte der Walzenpresse nach
Fig. 1 , - Fig. 2b
- einen Schnitt A-A durch den Gegenstand nach
Fig. 2a , - Fig. 2c
- einen Schnitt B-B durch den Gegenstand nach
Fig. 2a , - Fig. 3a
- die Begrenzungsplatte nach
Fig. 2a ohne Verschleißschutzelemente, - Fig. 3b
- einen Schnitt C-C durch den Gegenstand nach
Fig. 3a und - Fig. 3c
- einen Schnitt D-D durch den Gegenstand nach
Fig. 3a .
- 1
- schematically simplified a section of a roller press in the area of a boundary plate,
- Figure 2a
- a boundary plate of the roller press
1 , - Figure 2b
- trace a section AA through the object
Figure 2a , - Figure 2c
- trace a section BB through the object
Figure 2a , - Figure 3a
- the boundary plate
Figure 2a without wear protection elements, - Figure 3b
- trace a section CC through the object
Figure 3a and - 3c
- a section DD through the object
Figure 3a .
In den Figuren ist schematisch stark vereinfacht der Materialeinzugsbereich einer Walzenpresse dargestellt, die z. B. für die Zerkleinerung von Material eingesetzt werden kann und die auch als Hochdruckwalzenpresse oder Gutbettwalzenmühle bezeichnet wird. Die Walzenpresse weist zwei Presswalzen 1 auf, die gegenläufig drehbar in einem nicht dargestellten Maschinenrahmen gelagert sind. Die Presswalzen 1 sind lediglich angedeutet. Zwischen den Presswalzen 1 ist ein sich in der Drehrichtung der Walzen trichterförmig verjüngender Walzenspalt 2 ausgebildet. In diesen Walzenspalt 2 wird von oben das zu verarbeitende Material eingeführt, z. B. im Sinne einer Schwerkraftzuführung oder auch mittels eines Schneckenzuteilers. Einzelheiten sind nicht dargestellt. Denn die Erfindung betrifft in besonderem Maße die seitlichen Begrenzungsplatten 3, die bei einer solchen Walzenpresse seitlich der Presswalzen 1 angeordnet sind und folglich den Walzenspalt 2 walzenstirnseitig begrenzen. In
In den
Erfindungsgemäß sind jedoch die Verschleißschutzelemente im Bereich der ersten Verschleißzone 6a als stiftförmige Verschleißschutzelemente und folglich als Verschleißschutzstifte bzw. Stifte 9 ausgebildet. Diese weisen bevorzugt eine Länge L auf, die größer als der Durchmesser D der Stifte 9 ist, vorzugsweise mehr als das Doppelte des Durchmessers D beträgt. Ferner ist in den Figuren erkennbar, dass die Grundplatte 5 in der ersten Verschleißzone 6a eine Vielzahl von einzelnen, in die Grundplatte eingearbeiteten Ausnehmungen 10 aufweist. In diese Ausnehmungen 10 sind nun jeweils einzeln die Stifte 9 mit ihrer vollen Länge L eingesteckt, und zwar derart, dass die Stifte 9 nicht über die Ausnehmungen 10 hinaus vorkragen, sondern im Ausführungsbeispiel bündig fluchtend in die Ausnehmungen 10 eingesetzt sind. Dieses ist in dem dargestellten Ausführungsbeispiel dadurch realisiert, dass die Länge L der Stifte (im Wesentlichen) der Tiefe T der Ausnehmungen 10 entspricht. Die Stifte 9 können (ebenfalls) aus Hartmetall gefertigt sein.According to the invention, however, the wear protection elements in the region of the
Die Grundplatte 5 ist aus einem duktilen Metall, z. B. aus Stahl, gefertigt. Bevorzugt wird die Grundplatte 5 einstückig gefertigt, d. h. sowohl die flächige Vertiefung 8 als auch die einzelnen Ausnehmungen 10 sind unmittelbar in die Grundplatte integriert, z. B. durch spanabhebende Bearbeitung. Die zylindrischen Ausnehmungen 10 für die Stifte 9 können z. B. als Bohrungen ausgebildet sein, und zwar bevorzugt mit einem flachen Boden.The
Die Ausgestaltung der Grundplatte 5 ergibt sich insbesondere aus einer vergleichenden Betrachtung der
Insbesondere in den
Im Übrigen ist erkennbar, dass auch die Kacheln 7 bzw. die flächige Vertiefung 8 so dimensioniert sind, dass die Kacheln 7 mit Ihrer Oberfläche bündig mit der flächigen Vertiefung 8 bzw. der Umrandung der flächigen Vertiefung 8 abschließen und auch bündig mit den Stiften 9 abschließen, so dass insgesamt eine einheitliche Verschleißschutzschicht 6 mit im Wesentlichen ebener Oberfläche realisiert ist.Furthermore, it can be seen that the
Claims (13)
- Roller press, in particular for comminuting material, with two rotatably mounted press rollers (1), between which a roller gap (2) is formed in which the material to be processed is transported,wherein the roller gap (2) is delimited on the roller face side by means of limiting plates (3),wherein the limiting plates each comprise a base plate (5) and a wear protection layer (6) fastened on the base plate (5),wherein, at least in a first wearing zone (6a), the wear protection layer (6) is formed by individual wear protection elements, which at least in parts are made of a wear-resistant material of greater hardness compared with the base plate (5),characterised in thatthe wear protection elements in the first wear zone (6a) are configured as studs (9),in that in a first wearing zone (6a), the base plate (5) comprises a plurality of individual recesses (10) incorporated into the base plate (5), andin that an individual stud (9) is inserted with its full length (L) into each recess (10) in such a way that the studs (9) do not protrude out beyond the recesses (10).
- Roller press according to claim 1, characterised in that the studs (9) are inserted into the recess (10) in flush alignment.
- Roller press according to claim 2, characterised in that the length (L) of the studs (9) is equivalent to the depth (T) of the recesses (10).
- Roller press according to any one of claims 1 to 3, characterised in that the recesses (10) are separated from one another by separating strips (11) and the studs (9) are inserted with their entire length (L) into the recesses (10) in such a way that the studs (9) do not protrude out of the recesses (10) beyond the separating strips (11), wherein the studs preferably end flush with the separating strips (11).
- Roller press according to any one of claims 1 to 4, characterised in that the recesses (10) are designed cylindrically, more particularly as bores, and in that the studs (9) are cylindrical in design.
- Roller press according to claim 4 or 5, characterised in that the separating strips (11) have a minimum thickness (b) which is smaller than half the diameter (d) of the recesses.
- Roller press according to any one of claims 1 to 6, characterised in that the studs (9) have a diameter (D) of 6 mm to 20 mm, preferably 10 mm to 20 mm, e.g. 14 mm to 16 mm, and/or in that the separating strips (11) have a minimum thickness (b) of less than 8 mm, preferably less than 6 mm.
- Roller press according to any one of claims 1 to 7, characterised in that the studs (9) inserted into the recess (10) are also fastened in the recesses (10) in a bonded manner, e.g. adhered, soldered or welded.
- Roller press according to any one of claims 1 to 8, characterised in that the base plates are made of ductile metal, in particular steel, preferably in one piece by way of machining.
- Roller press according to any one of claims 1 to 9, characterised in that the wear protection elements, more particularly studs (9), are made of a wear-resistant, multiple phase material, e.g. of hard metal.
- Roller press according to any one of claims 1 to 10, characterised in that the base plates each comprise a second wearing zone (6b) which is formed of a flat recess (8), into which a plurality of wear protection elements that adjoin each other and are designed as plate-like tiles (7), are inserted.
- Roller press according to any one of claims 1 to 11, characterised in that the limiting plates (3) are detachably fastened to carrier plates (4), e.g. by means of screws, wherein the carrier plates (4) with the limiting plates (3) attached to them, are fastened to a machine frame of the roller press.
- Limiting plate (3) for a roller press according to any one of claims 1 to 12, wherein the limiting plate (3) comprises a base plate (5) and a wear protection layer (6) fastened to the base plate (5), wherein, at least in a first wearing zone (6a), the wear protection layer (6) is formed of individual wear protection elements which are made of wear-resistant material with a hardness that is greater than that of the base plate (5),
characterised in thatthe wear protection elements in the first wearing zone (6a) are stud-like wear protection elements and consequently designed as studs (9),in that in the first wearing zone (6a), the base plate (5) comprises a plurality of individual recesses (10) with a depth (T), that are incorporated into the carrier plate (4),in that into each of the recesses (10) a single wear protection stud (9) is inserted with its full length (L) in such a way that the studs (9) do not protrude out beyond the recesses (10), wherein they preferably end flush with the recesses (10).
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DE102018113440.1A DE102018113440A1 (en) | 2018-06-06 | 2018-06-06 | roll press |
PCT/EP2019/056491 WO2019233647A1 (en) | 2018-06-06 | 2019-03-14 | Roller press |
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EP (1) | EP3801910B1 (en) |
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CN112257220B (en) * | 2020-08-31 | 2022-10-04 | 首钢京唐钢铁联合有限责任公司 | Method and device for acquiring local wear degree of high-speed steel working roller |
DE102021103573B4 (en) | 2021-02-16 | 2024-06-13 | Maschinenfabrik Köppern Gmbh & Co. Kg | High pressure roller press |
DE202021103408U1 (en) | 2021-06-25 | 2022-04-04 | Maschinenfabrik Köppern Gmbh & Co. Kg | high-pressure roller press |
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-
2018
- 2018-06-06 DE DE102018113440.1A patent/DE102018113440A1/en not_active Withdrawn
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2019
- 2019-03-14 DK DK19712159.3T patent/DK3801910T3/en active
- 2019-03-14 US US17/051,224 patent/US20210121892A1/en not_active Abandoned
- 2019-03-14 WO PCT/EP2019/056491 patent/WO2019233647A1/en unknown
- 2019-03-14 CN CN201980037450.9A patent/CN112236234A/en active Pending
- 2019-03-14 AU AU2019281754A patent/AU2019281754A1/en active Pending
- 2019-03-14 EP EP19712159.3A patent/EP3801910B1/en active Active
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DK3801910T3 (en) | 2022-08-29 |
WO2019233647A1 (en) | 2019-12-12 |
EP3801910A1 (en) | 2021-04-14 |
US20210121892A1 (en) | 2021-04-29 |
DE102018113440A1 (en) | 2019-12-12 |
CN112236234A (en) | 2021-01-15 |
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