EP2819784B1 - Adjustable crushing mill, particularly for crushing dry ice - Google Patents

Adjustable crushing mill, particularly for crushing dry ice Download PDF

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Publication number
EP2819784B1
EP2819784B1 EP13709810.9A EP13709810A EP2819784B1 EP 2819784 B1 EP2819784 B1 EP 2819784B1 EP 13709810 A EP13709810 A EP 13709810A EP 2819784 B1 EP2819784 B1 EP 2819784B1
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crushing
breaking bar
adjustable
cross
grinding
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German (de)
French (fr)
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EP2819784A1 (en
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Wilfried BÖHM
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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
    • B02C4/10—Crushing or disintegrating by roller mills with a roller co-operating with a stationary member
    • B02C4/12—Crushing or disintegrating by roller mills with a roller co-operating with a stationary member in the form of a plate

Definitions

  • Grinders that are suitable for grinding dry ice, usually work with a grinding roller, which forms a nip together with a crushing bar or a second grinding roller, in which the supplied ground material, such as dry ice, is ground by the rotation of the grinding roller.
  • a grinding roller which forms a nip together with a crushing bar or a second grinding roller, in which the supplied ground material, such as dry ice, is ground by the rotation of the grinding roller.
  • the supplied ground material such as dry ice
  • two normally counter-rotating grinding rollers are used, between the peripheral surfaces of the required Mahlspalt is formed.
  • two likewise usually opposite grinding rollers between which a crushing bar is arranged, so that there are two grinding gaps.
  • Such a construction is generally considered to be powerful and effective.
  • the grinding gap must be suitably dimensioned.
  • Devices according to the preamble of claim 1 are made DE 895 689 C or US 331 165 A known.
  • the object of the invention is to provide a grinder which provides good grinding results over a wide range of uses, especially when grinding dry ice
  • the crushing bar is arranged between the grinding rollers, resulting in two grinding gaps. This is achieved in that the crushing bar protrudes into the space between the two grinding rollers in such a way that it intersects the connecting line between the two axes of rotation of the grinding rollers.
  • the crushing bar is slidably provided, wherein it has a cross section which is not constant transversely to the direction of displacement. The displacement is dimensioned such that the crushing bar in the usual working range of the grinder always protrudes in the manner mentioned between the two grinding rollers to form two grinding gaps, so the connecting line between the two axes of rotation of the grinding rolls.
  • the grinding gap between a grinding roller and the crushing bar can be set between a minimum and a maximum value.
  • the said construction is also excellent for grinders in which two spaced grinding rollers are provided, between which a crushing bar is arranged.
  • the storage of the grinding roller and its drive must not be made adjustable, but can be designed in a simple manner, and yet by the tangential displacement of the crushing bar with a suitable cross-sectional choice of the crushing bar a substantial variation of the two Mahlspalte each between the grinding roller and the Crushing bar can be achieved.
  • a wide variety of cross-sectional designs of the crushing bar have been proven depending on the desired millbase, which of course by varying extents in cross-section, the said variation of the grinding gaps is achieved.
  • the crushing bar has in the upper region, ie the area from which the ground material is fed, a greater extension in cross-section than in the lower region.
  • the break bar has a wedge-shaped cross-section in cross-section, at least over a partial region.
  • the surfaces of this wedge-shaped region can be flat or concave.
  • a suitable locking device is expediently provided, by means of the crushing bar can be locked in a desired position.
  • a displacement device is provided, which is connected to the crushing bar to move the crushing bar in the desired position. This device can simultaneously be designed as a locking device and, after setting the crushing bar in the desired position also ensure the locking of the crushing bar in this position.
  • the crushing bar is arranged between two counter-rotating grinding rollers, so that two grinding gaps result, wherein the material to be ground is supplied from above by means of a funnel.
  • the direction of rotation of the grinding rollers is chosen so that the material to be ground drawn into the nip and ultimately pushed therethrough.
  • the ground material drops out by gravity, and is absorbed by a metering device, for example.
  • the displaceable crushing bar has in cross section a first region which has a constant cross section. These are followed by a wedge-shaped central cross-sectional area, which merges into an end region which is formed with a constant cross-section.
  • the figure shows the preferred embodiment in cross section.
  • the actual grinder 1 dry ice is fed via a dry erector.
  • the entire device is provided and constructed such that the dry canister 1 is arranged in the uppermost region, so that the dry ice is introduced into the actual grinder by gravity, and the ground grind leaves the grinder due to gravity in order to be picked up by a portioning device 8 become.
  • the actual grinder is arranged, which has two baffles 2, which in turn form a funnel 6.
  • two counter-rotating grinding rollers 3 are arranged, of which the right in the illustration to be seen grinding roller rotates left and the opposite Grinding roller on the right.
  • a crushing bar 5 is provided, which thus forms two grinding gaps 4 in cooperation with the grinding rollers 3.
  • the material to be ground is drawn into the nip and conveyed through it, so that it falls by gravity into the portioning device 8 at the exit of the grinding gap 4.
  • the crushing bar 5 is displaceable in the direction shown by the arrow, that is, in simplified terms, can be moved up or down.
  • the direction of movement corresponds to the direction of a tangent to the grinding roller circumference applied in the nip 4.
  • the lowermost region 5a of the crushing bar has a rounded design at the end and has a constant cross section.
  • the central region 5b of the crushing bar is designed wedge-shaped in cross section with flat contact surfaces. This section is followed at the top by the end section 5c, which is not important for the grinding result, and in this embodiment has a constant cross-section, although other configurations are also readily possible.
  • This end portion 5c is connected to the displacement device 7, which allows and causes the said displacement of the crushing bar 5. If the crushing bar 5 is brought into the desired position, i. E. the nip 4 set to the desired level, there is a locking of the crushing bar 5 via a locking device, not shown.
  • the crushing bar (5) projects so far into the space between the two grinding rollers (3) that form two grinding gaps.
  • the possible displacement of the crushing bar (5) is determined so that in the normal operating range the crushing bar (5) always protrudes into the area between the two grinding rollers (3), so the crushing bar (5) the connecting line between the two axes of rotation of the grinding rollers ( 3) cuts.
  • the breaking bar (5) can easily the width the two nips (4) are each set between a grinding roller (3) and the breaking strip (5).
  • the nip 4 can be set to the desired level before the start of the grinding process by the break bar 5 is moved accordingly, so positioned. But it is also possible to change the nip 4 during a grinding operation. An opening of the nip 4, so an enlargement of the nip 4, this is easy to achieve by moving the crushing bar 5 upwards. A reduction of the nip 4 by a downward movement of the crushing bar 5 is basically possible, but in this case must be delivered very slowly to avoid blocking the grinder or excessive loads on the bearings of the grinding rollers 3 and the crushing bar 5.

Description

Mahlwerke, die zum Mahlen von Trockeneis geeignet sind, arbeiten üblicherweise mit einer Mahlwalze, die zusammen mit einer Brechleiste oder einer zweiten Mahlwalze einen Walzenspalt bildet, in dem das zugeführte Mahlgut, beispielsweise Trockeneis, durch die Rotation der Mahlwalze gemahlen wird. Grundsätzlich kann man bei derartigen Mahlwerken, die mit zumindest einer rotierenden Mahlwalze arbeiten, drei Kategorien unterscheiden.Grinders that are suitable for grinding dry ice, usually work with a grinding roller, which forms a nip together with a crushing bar or a second grinding roller, in which the supplied ground material, such as dry ice, is ground by the rotation of the grinding roller. Basically, one can distinguish three categories in such grinders that work with at least one rotating grinding roller.

Eine Konstruktion, bei der eine Mahlwalze zum Einsatz kommt, deren äußerer Umfang zusammen mit einer Brechleiste einen Mahlspalt ausbildet. Gemäß einer weiteren möglichen Konstruktion werden zwei im Normalfall gegenläufig rotierende Mahlwalzen eingesetzt, zwischen deren Umfangsflächen der erforderliche Mahlspalt ausgebildet wird. Weiterhin ist es möglich, zwei ebenfalls üblicherweise gegenläufige Mahlwalzen einzusetzen, zwischen denen eine Brechleiste angeordnet wird, sodass sich zwei Mahlspalte ergeben. Eine derartige Konstruktion wird allgemein als leistungsstark und effektiv betrachtet. Zur Ausbildung eines geeigneten Mahlspaltes weist die Brechleiste an der der Mahlwalze gegenüberliegenden Fläche eine geeignete Oberflächengestaltung auf, mit der das gewünschte Mahlergebnis erzielt wird. Bei jedem dieser Mahlwerke muss selbstverständlich der Mahlspalt in geeigneter Weise dimensioniert werden.A construction in which a grinding roller is used whose outer circumference forms a grinding gap together with a break bar. According to another possible construction two normally counter-rotating grinding rollers are used, between the peripheral surfaces of the required Mahlspalt is formed. Furthermore, it is possible to use two likewise usually opposite grinding rollers, between which a crushing bar is arranged, so that there are two grinding gaps. Such a construction is generally considered to be powerful and effective. To form a suitable grinding gap, the crushing bar on the surface opposite the grinding roller on a suitable surface design, with which the desired grinding result is achieved. Of course, in each of these grinders, the grinding gap must be suitably dimensioned.

Vorrichtungen gemäß dem Oberbegriff des Anspruchs 1 sind aus DE 895 689 C oder US 331 165 A bekannt.Devices according to the preamble of claim 1 are made DE 895 689 C or US 331 165 A known.

Aufgabe der Erfindung ist es, ein Mahlwerk zu schaffen, das über ein breites Einsatzspektrum gute Mahlergebnisse, insbesondere beim Mahlen vnn Trockeneis erbringtThe object of the invention is to provide a grinder which provides good grinding results over a wide range of uses, especially when grinding dry ice

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Wesentlich ist, dass die Brechleiste so zwischen den Mahlwalzen angeordnet ist, dass sich zwei Mahlspalte ergeben. Dies wird dadurch erreicht, dass die Brechleiste derart in den Zwischenraum zwischen den beiden Mahlwalzen hineinragt, dass sie die Verbindungslinie zwischen den beiden Drehachsen der Mahlwalzen schneidet. Die Brechleiste ist verschieblich vorgesehen, wobei sie einen Querschnitt aufweist, der quer zur Verschieberichtung nicht konstant ist. Der Verschiebeweg ist derart bemessen, dass die Brechleiste im üblichen Arbeitsbereich des Mahlwerks immer in der genannten Weise zwischen die zwei Mahlwalzen ragt, um zwei Mahlspalte auszubilden, also die Verbindungslinie zwischen den beiden Drehachsen der Mahlwalzen schneidet. Für spezielle Anwendungen und beispielsweise zum Auswechseln der Brechleiste kann diese weiter verschoben werden, so dass sie die genannte Verbindungslinie nicht schneidet. Durch die verschiebliche Lagerung der Brechleiste kann der Mahlspalt zwischen einer Mahlwalze und der Brechleiste zwischen einem Minimum- und einem Maximumwert eingestellt werden. Durch diese Merkmale wird über ein breites Einsatzspektrum des Mahlwerks, insbesondere beim Mahlen von Trockeneis, gewährleistet, dass der Mahlspalt optimal auf das Mahlgut bzw. das gewünschte Mahlergebnis einstellbar ist.This object is solved by the features of claim 1. It is essential that the crushing bar is arranged between the grinding rollers, resulting in two grinding gaps. This is achieved in that the crushing bar protrudes into the space between the two grinding rollers in such a way that it intersects the connecting line between the two axes of rotation of the grinding rollers. The crushing bar is slidably provided, wherein it has a cross section which is not constant transversely to the direction of displacement. The displacement is dimensioned such that the crushing bar in the usual working range of the grinder always protrudes in the manner mentioned between the two grinding rollers to form two grinding gaps, so the connecting line between the two axes of rotation of the grinding rolls. For special applications and, for example, for replacing the crushing bar this can be moved further so that they do not cut the said connection line. Due to the slidable mounting of the crushing bar, the grinding gap between a grinding roller and the crushing bar can be set between a minimum and a maximum value. These features ensure over a wide range of applications of the grinder, especially when grinding dry ice, that the grinding gap is optimally adjusted to the material to be ground or the desired grinding result.

Grundsätzlich sind unterschiedlichste Arten der Verschiebung oder Bewegung der Brechleiste vorstellbar, um den Mahlspalt zwischen einem Minimum und einem Maximum variieren zu können. Die Verschiebung kann grundsätzlich geradlinig oder auf einer Kurvenbahn erfolgen. Es hat sich jedoch herausgestellt, dass insbesondere zwei Möglichkeiten zum Einen in der Praxis gut umsetzbar sind, zum Anderen gute Ergebnisse erbringen. Dies ist zum Einen eine Verschiebung der Brechleiste in einer Richtung, die radial von der Drehachse der Mahlwalze aus orientiert ist. Hierbei wird mittels eines einfachen Bewegungsablaufs eine Einstellung des Mahlspalts über einen weiten Bereich problemlos möglich. Weiterhin hat es sich bewährt, eine Verschiebung der Brechleiste in einer Richtung vorzusehen, die tangential zu der Mahlwalze orientiert ist, wobei auf die Tangente im Walzenspalt abgestellt wird, wobei des Weiteren eine Brechleiste vorgesehen wird, die einen Querschnitt aufweist, der quer zur Verschieberichtung nicht konstant ist. Auch bei einer derartigen Konstruktion kann durch eine geeignete Form des Querschnitts der Brechleiste in Zusammenspiel mit der tangentialen Verschiebung der Brechleiste der Mahlspalt über einen weiten Bereich problemlos eingestellt werden.In principle, various types of displacement or movement of the crushing bar can be imagined in order to be able to vary the refining gap between a minimum and a maximum. The shift can basically be done in a straight line or on a curved path. However, it has turned out that, in particular, two options on the one hand can be implemented well in practice and, on the other hand, produce good results. This is, on the one hand, a displacement of the crushing bar in one direction, which is oriented radially from the axis of rotation of the grinding roller. Here, by means of a simple movement sequence, an adjustment of the grinding gap over a wide range is possible without any problem. Furthermore, it has been proven to provide a displacement of the crushing bar in a direction which is oriented tangentially to the grinding roller, wherein the Tangent is parked in the nip, further comprising a crushing bar is provided which has a cross-section which is not constant transversely to the direction of displacement. Even with such a construction can be easily adjusted by a suitable shape of the cross section of the crushing bar in conjunction with the tangential displacement of the crushing bar of the refining gap over a wide range.

Die genannte Konstruktion eignet sich auch hervorragend für Mahlwerke, bei denen zwei beabstandete Mahlwalzen vorgesehen sind, zwischen denen eine Brechleiste angeordnet ist. Bei einer derartigen Konstruktion muss die Lagerung der Mahlwalze und deren Antrieb nicht verstellbar ausgeführt sein, sondern kann auf einfache Weise gestaltet sein, und dennoch durch die tangentiale Verschiebung der Brechleiste bei geeigneter Querschnittswahl der Brechleiste eine weitgehende Variierung der beiden Mahlspalte jeweils zwischen der Mahlwalze und der Brechleiste erreicht werden. Dabei haben sich unterschiedlichste Querschnittsgestaltungen der Brechleiste in Abhängigkeit von dem angestrebten Mahlgut bewährt, wobei natürlich durch unterschiedliche Erstreckungen im Querschnitt die genannte Variation der Mahlspalte erreicht wird. Die Brechleiste weist im oberen Bereich, also dem Bereich, von dem aus das Mahlgut zugeführt wird, eine größere Erstreckung im Querschnitt auf als im unteren Bereich. Dabei weist die Brechleiste im Querschnitt zumindest über einen Teilbereich hinweg einen keilförmigen Querschnitt auf. Die Flächen dieses keilförmigen Bereichs können plan oder konkav ausgebildet sein.The said construction is also excellent for grinders in which two spaced grinding rollers are provided, between which a crushing bar is arranged. In such a construction, the storage of the grinding roller and its drive must not be made adjustable, but can be designed in a simple manner, and yet by the tangential displacement of the crushing bar with a suitable cross-sectional choice of the crushing bar a substantial variation of the two Mahlspalte each between the grinding roller and the Crushing bar can be achieved. In this case, a wide variety of cross-sectional designs of the crushing bar have been proven depending on the desired millbase, which of course by varying extents in cross-section, the said variation of the grinding gaps is achieved. The crushing bar has in the upper region, ie the area from which the ground material is fed, a greater extension in cross-section than in the lower region. In this case, the break bar has a wedge-shaped cross-section in cross-section, at least over a partial region. The surfaces of this wedge-shaped region can be flat or concave.

Zur Arretierung der Brechleiste ist zweckmäßig eine geeignete Feststelleinrichtung vorgesehen, mittels der die Brechleiste in einer gewünschten Stellung arretierbar ist. Zur Bewegung bzw. Verschiebung der Brechleiste wird eine Verschiebeeinrichtung vorgesehen, die mit der Brechleiste verbunden ist, um die Brechleiste in die gewünschte Position zu bewegen. Diese Einrichtung kann gleichzeitig als Feststelleinrichtung ausgebildet sein, und nach Einstellen der Brechleiste in die gewünschte Position auch die Arretierung der Brechleiste in dieser Position gewährleisten.To lock the crushing bar a suitable locking device is expediently provided, by means of the crushing bar can be locked in a desired position. To move or shift the crushing bar, a displacement device is provided, which is connected to the crushing bar to move the crushing bar in the desired position. This device can simultaneously be designed as a locking device and, after setting the crushing bar in the desired position also ensure the locking of the crushing bar in this position.

Gemäß dem bevorzugten im Weiteren detailliert beschriebenen Ausführungsbeispiel der Erfindung ist die Brechleiste zwischen zwei gegenläufig drehenden Mahlwalzen angeordnet, sodass sich zwei Mahlspalte ergeben, wobei das Mahlgut von oben mittels eines Trichters zugeführt wird. Die Drehrichtung der Mahlwalzen wird dabei so gewählt, dass das Mahlgut in den Walzenspalt hineingezogen und letztendlich durch diesen hindurchgedrängt wird. Im Ausgangsbereich der Walzenspalte fällt das gemahlene Mahlgut durch die Schwerkraft heraus, und wird beispielsweise von einer Dosiereinrichtung aufgenommen. Die verschiebbare Brechleiste weist im Querschnitt einen ersten Bereich auf, der über einen konstanten Querschnitt verfügt. An diesen schließt sich ein keilförmiger mittlerer Querschnittsbereich an, der in einen Endbereich übergeht, der mit konstantem Querschnitt ausgebildet ist.According to the preferred embodiment of the invention described in more detail below, the crushing bar is arranged between two counter-rotating grinding rollers, so that two grinding gaps result, wherein the material to be ground is supplied from above by means of a funnel. The direction of rotation of the grinding rollers is chosen so that the material to be ground drawn into the nip and ultimately pushed therethrough. In the exit region of the nips, the ground material drops out by gravity, and is absorbed by a metering device, for example. The displaceable crushing bar has in cross section a first region which has a constant cross section. These are followed by a wedge-shaped central cross-sectional area, which merges into an end region which is formed with a constant cross-section.

Die Erfindung wird näher anhand des bevorzugten Ausführungsbeispiels erläutert.The invention will be explained in more detail with reference to the preferred embodiment.

Die Figur zeigt das bevorzugte Ausführungsbeispiel im Querschnitt.The figure shows the preferred embodiment in cross section.

Dem eigentlichen Mahlwerk wird über einen Trockeneistrichter 1 Trockeneis zugeführt. Die ganze Einrichtung ist so vorgesehen und aufgebaut, dass der Trockeneistrichter 1 im obersten Bereich angeordnet ist, sodass das Trockeneis durch die Schwerkraft in das eigentliche Mahlwerk eingebracht wird, und das gemahlene Mahlgut das Mahlwerk aufgrund der Schwerkraft verlässt, um von einer Portioniereinrichtung 8 aufgenommen zu werden. Unterhalb des Trockeneistrichters 1 ist das eigentliche Mahlwerk angeordnet, das über zwei Leitbleche 2 verfügt, die ihrerseits einen Trichter 6 ausbilden. Im unteren Bereich dieses Trichters 6 sind zwei gegenläufige Mahlwalzen 3 angeordnet, von denen die in der Darstellung rechts zu sehende Mahlwalze links herum dreht und die gegenüberliegende Mahlwalze rechts herum. Zwischen diesen Mahlwalzen ist eine Brechleiste 5 vorgesehen, die somit in Zusammenspiel mit den Mahlwalzen 3 zwei Mahlspalte 4 ausbildet. Durch die genannte Drehrichtung der Mahlwalzen 3 wird das Mahlgut in den Walzenspalt hineingezogen und durch diesen hindurch befördert, sodass es am Ausgang des Mahlspalts 4 durch die Schwerkraft in die Portioniereinrichtung 8 fällt.The actual grinder 1 dry ice is fed via a dry erector. The entire device is provided and constructed such that the dry canister 1 is arranged in the uppermost region, so that the dry ice is introduced into the actual grinder by gravity, and the ground grind leaves the grinder due to gravity in order to be picked up by a portioning device 8 become. Below the dry ice hopper 1, the actual grinder is arranged, which has two baffles 2, which in turn form a funnel 6. In the lower part of this funnel 6 two counter-rotating grinding rollers 3 are arranged, of which the right in the illustration to be seen grinding roller rotates left and the opposite Grinding roller on the right. Between these grinding rollers, a crushing bar 5 is provided, which thus forms two grinding gaps 4 in cooperation with the grinding rollers 3. By the mentioned direction of rotation of the grinding rollers 3, the material to be ground is drawn into the nip and conveyed through it, so that it falls by gravity into the portioning device 8 at the exit of the grinding gap 4.

Die Brechleiste 5 ist in der mittels des Pfeils dargestellten Richtung verschieblich, kann also vereinfacht ausgedrückt nach oben oder unten verschoben werden. Dabei entspricht die Bewegungsrichtung der Richtung einer Tangente am Mahlwalzenumfang angelegt im Walzenspalt 4. Der unterste Bereich 5a der Brechleiste weist am Ende eine abgerundete Gestaltung aus und weist einen konstanten Querschnitt auf. Der mittlere Bereich 5b der Brechleiste ist im Querschnitt keilförmig mit planen Kontaktflächen gestaltet. An diesen Abschnitt schließt sich nach oben hin der Endabschnitt 5c an, der für das Mahlergebnis nicht von Bedeutung ist, und bei diesem Ausführungsbeispiel mit konstantem Querschnitt ausgebildet ist, wobei auch andere Gestaltungen ohne Weiteres möglich sind. Dieser Endabschnitt 5c ist mit der Verschiebeeinrichtung 7 verbunden, die die genannte Verschiebung der Brechleiste 5 ermöglicht und bewirkt. Ist die Brechleiste 5 in die gewünschte Position gebracht, d.h. der Walzenspalt 4 auf das gewünschte Maß eingestellt, erfolgt eine Arretierung der Brechleiste 5 über eine nicht dargestellte Feststelleinrichtung.The crushing bar 5 is displaceable in the direction shown by the arrow, that is, in simplified terms, can be moved up or down. In this case, the direction of movement corresponds to the direction of a tangent to the grinding roller circumference applied in the nip 4. The lowermost region 5a of the crushing bar has a rounded design at the end and has a constant cross section. The central region 5b of the crushing bar is designed wedge-shaped in cross section with flat contact surfaces. This section is followed at the top by the end section 5c, which is not important for the grinding result, and in this embodiment has a constant cross-section, although other configurations are also readily possible. This end portion 5c is connected to the displacement device 7, which allows and causes the said displacement of the crushing bar 5. If the crushing bar 5 is brought into the desired position, i. E. the nip 4 set to the desired level, there is a locking of the crushing bar 5 via a locking device, not shown.

Wie aus der Figur zu ersehen, ragt die Brechleiste (5) so weit in den Zwischenraum zwischen den beiden Mahlwalzen (3), dass sich zwei Mahlspalte bilden. Der mögliche Verschiebeweg der Brechleiste (5) ist dabei so bestimmt, dass im normalen Betriebsbereich die Brechleiste (5) immer in den Bereich zwischen den beiden Mahlwalzen (3) hineinragt, also die Brechleiste (5) die Verbindungslinie zwischen den beiden Drehachsen der Mahlwalzen (3) schneidet. Durch die dargestellte und beschriebene Querschnittsgestaltung der Brechleiste (5) kann auf einfache Weise die Weite der beiden Walzenspalte (4) jeweils zwischen einer Mahlwalze (3) und der Brechleiste (5) eingestellt werden.As can be seen from the figure, the crushing bar (5) projects so far into the space between the two grinding rollers (3) that form two grinding gaps. The possible displacement of the crushing bar (5) is determined so that in the normal operating range the crushing bar (5) always protrudes into the area between the two grinding rollers (3), so the crushing bar (5) the connecting line between the two axes of rotation of the grinding rollers ( 3) cuts. Through the illustrated and described cross-sectional design of the break bar (5) can easily the width the two nips (4) are each set between a grinding roller (3) and the breaking strip (5).

Bei der beschriebenen Konstruktion kann der Walzenspalt 4 vor Beginn des Mahlvorgangs auf das gewünschte Maß eingestellt werden, indem die Brechleiste 5 entsprechend verschoben, also positioniert wird. Es ist aber auch möglich, während eines Mahlvorgangs den Walzenspalt 4 zu verändern. Ein Öffnen des Walzenspalts 4, also ein Vergrößern des Walzenspalts 4, ist dabei unproblematisch durch eine Bewegung der Brechleiste 5 nach oben zu erreichen. Eine Verkleinerung des Walzenspalts 4 durch ein Hinabbewegen der Brechleiste 5 ist grundsätzlich möglich, jedoch muss in diesem Fall sehr langsam zugestellt werden, um ein blockieren des Mahlwerks oder zu hohe Belastungen auf die Lagerungen der Mahlwalzen 3 und der Brechleiste 5 zu vermeiden.In the described construction, the nip 4 can be set to the desired level before the start of the grinding process by the break bar 5 is moved accordingly, so positioned. But it is also possible to change the nip 4 during a grinding operation. An opening of the nip 4, so an enlargement of the nip 4, this is easy to achieve by moving the crushing bar 5 upwards. A reduction of the nip 4 by a downward movement of the crushing bar 5 is basically possible, but in this case must be delivered very slowly to avoid blocking the grinder or excessive loads on the bearings of the grinding rollers 3 and the crushing bar 5.

Claims (6)

  1. Adjustable crushing mill, in particular for crushing dry ice, having at least one crushing roller (3) and a breaking bar (5) which are arranged such that they form a crushing gap (4), wherein the breaking bar (5) is arranged so as to be displaceable in a guide and is displaceable by means of an actuating device such that the crushing gap (4) is settable between a minimum and maximum value, wherein two spaced-apart crushing rollers (3) that are driven in opposite directions are provided, the breaking bar (5) being arranged between said crushing rollers (3) such that two crushing gaps (4) are produced, wherein the material to be crushed is fed from above by means of a hopper (6) and the direction of rotation of the crushing rollers (3) is selected such that the material to be crushed is pushed into the roller gap (4) and through the latter, such that it drops out of the roller gap (4) on the underside thereof and, in order to set the crushing gaps (4), the displaceable breaking bar (5) has a cross section which is not constant transversely to the displacement direction,
    characterized in that the breaking bar (5) has a greater cross-sectional extent in its upper region than in its lower region, wherein the breaking bar (5) has an end region (5a) with a constant cross section in its lower region, a region (5b) with a substantially conical cross section upwardly adjoining said end region (5a).
  2. Adjustable crushing mill according to Claim 1, characterized in that the guide is arranged such that the displacement of the breaking bar (5) takes place in a direction which is oriented radially from the rotation axis of the crushing roller (3).
  3. Adjustable crushing mill according to Claim 1, characterized in that the guide is arranged such that the displacement of the breaking bar (5) takes place in a direction which is oriented tangentially to the crushing roller (3), wherein the tangent is applied in the roller gap and the breaking bar (5) has a cross section which is not constant transversely to this direction.
  4. Adjustable crushing mill according to one of Claims 1 to 3, characterized in that the breaking bar (5) is arranged between two spaced-apart crushing rollers (3) such that a connecting line between the two rotation axes of the crushing rollers (3) intersects the breaking bar (5).
  5. Adjustable crushing mill according to Claim 1, characterized in that the guide allows the breaking bar (5) to be displaced upwards or downwards, wherein the elongate breaking bar (5) is oriented with crushing faces on both sides in the conveying direction of the material to be crushed through the roller gap (4).
  6. Adjustable crushing mill according to one of Claims 1 to 5, characterized by a fixing device, by means of which the breaking bar (5) is fixable in a desired position.
EP13709810.9A 2012-03-02 2013-03-01 Adjustable crushing mill, particularly for crushing dry ice Active EP2819784B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201210203332 DE102012203332A1 (en) 2012-03-02 2012-03-02 ADJUSTABLE GRINDING, ESPECIALLY FOR GRINDING DRY ICE
PCT/EP2013/054138 WO2013127986A1 (en) 2012-03-02 2013-03-01 Adjustable crushing mill, particularly for crushing dry ice

Publications (2)

Publication Number Publication Date
EP2819784A1 EP2819784A1 (en) 2015-01-07
EP2819784B1 true EP2819784B1 (en) 2016-05-18

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EP13709810.9A Active EP2819784B1 (en) 2012-03-02 2013-03-01 Adjustable crushing mill, particularly for crushing dry ice

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EP (1) EP2819784B1 (en)
DE (1) DE102012203332A1 (en)
WO (1) WO2013127986A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015109354A2 (en) 2014-01-27 2015-07-30 Feiba Engineering & Plants Gmbh Adjusting mechanism for roller mills
DE202016101964U1 (en) 2015-04-20 2016-04-28 Dca Deckert Anlagenbau Gmbh ray device
CN106944188B (en) * 2017-03-28 2019-11-15 李玉贞 A kind of Pharmacy's drug crushing preparation facilities
CN108499660A (en) * 2018-03-01 2018-09-07 许洁 A kind of adjustable construction brick breaker of degree of crushing
CN109022047B (en) * 2018-08-28 2020-10-30 泗县微腾知识产权运营有限公司 Method for recycling slag of coal chemical gasification furnace
CN111879038A (en) * 2020-07-26 2020-11-03 张晓艳 Aquatic product fresh-keeping ice crusher
DE202023002302U1 (en) 2023-04-18 2024-03-08 Jürgen v.d. Ohe Device for cleaning surfaces and systems with a mechanically acting cryogenic blasting agent made of extremely cold water ice

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US331165A (en) * 1885-11-24 Thomas sheldon
US297756A (en) * 1884-04-29 John m
FR594462A (en) * 1925-03-03 1925-09-14 Stone breaking machine
DE895689C (en) * 1951-04-03 1953-11-05 Werner Melges Milling machine
US3510077A (en) * 1967-06-19 1970-05-05 Titanium Metals Corp Sizing shear
GB0614225D0 (en) * 2006-07-18 2006-08-23 J G Crushing & Recycling Ltd A crushing apparatus
GB2454668A (en) * 2007-11-13 2009-05-20 M G H Recycling Ltd Excavator bucket having a crusher
US8702024B2 (en) * 2008-04-16 2014-04-22 Apopka Recycling, Inc. Roller jaw crusher system and method

Also Published As

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DE102012203332A1 (en) 2013-09-05
EP2819784A1 (en) 2015-01-07
WO2013127986A1 (en) 2013-09-06

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