EP0511515A1 - Floculation roller crusher - Google Patents

Floculation roller crusher Download PDF

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Publication number
EP0511515A1
EP0511515A1 EP92105749A EP92105749A EP0511515A1 EP 0511515 A1 EP0511515 A1 EP 0511515A1 EP 92105749 A EP92105749 A EP 92105749A EP 92105749 A EP92105749 A EP 92105749A EP 0511515 A1 EP0511515 A1 EP 0511515A1
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EP
European Patent Office
Prior art keywords
pressure
valve
rolling mill
pressure accumulator
pump
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Granted
Application number
EP92105749A
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German (de)
French (fr)
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EP0511515B1 (en
Inventor
Wilhelm Fetzer
Bruno Burkhard
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Buehler AG
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Buehler AG
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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
    • B02C4/286—Feeding devices

Definitions

  • the invention relates to a rolling mill, in particular a flaking mill according to the preamble of claim 1.
  • a flaking mill of this type is known for example from EP-A-0 271 828. It is essential that return lines are provided. So that these can act as return lines, they must open out above the nip, that is, above that point at which the rollers come closest to each other.
  • the junction can be selected such that the material to be flocculated is fed directly into the nip. However, it has been shown for some products that the junction was difficult to choose correctly. The reason for the particles falling in at different distances from the end of the rollers was initially not clear.
  • the invention is therefore based on the object of achieving a further equalization of the wear of the rollers in that the particles are brought into the roller gap at a predetermined distance from their ends. This is achieved in a surprisingly simple manner by the characterizing features of claim 1.
  • the invention is based on the knowledge gained through investigations that certain products tend to settle or settle in the return channels, which occurs in particular on the return channel floor, thereby displacing the confluence point.
  • the arrangement of at least one cleaning device ensures that the confluence point always remains at the same height.
  • Such a cleaning device can be designed differently within the scope of the invention and work in different ways.
  • an intermittent mode of operation can be provided in which brushes, e.g. with a rotary drive, be dipped into the return shaft from time to time.
  • the cleaning device is preferably designed in the sense of claim 2. In this case, a rigid arrangement is facilitated.
  • a rolling mill according to FIG. 1 has two rolls 1 and 2, one roll preferably being designed as a fixed roll and the further roll being pressed against it in parallel.
  • a nip 3 is formed between the two rolls 1 and 2, i.e. an area where the grains of the product are caught and crushed.
  • a filler box 4 with an internal mixing device is provided above the rollers 1 and 2, vertically above the nip 3, a filler box 4 with an internal mixing device is provided. From the filling box 4, the material to be treated is fed to the nip 3 via a feed roller 5.
  • return lines 6 are provided in a central area between the rolls 1 and 2, which are channel-shaped and open above the roll gap with a guide surface 7 into the area between the rolls.
  • the product return can be impaired by the application of a contamination layer made of fine particles of the product in the return line 6, in particular on the guide surface 7.
  • cleaning devices for the return lines are provided according to the invention.
  • at least one blow pipe 8 is provided for each return line 6, which ends at one end in the return line 6.
  • a compressed air device is provided for feeding the blow pipes 8 with air, preferably consisting of a drive 9, a pump 10 and a switch 11 which switches the pump on and off.
  • a valve 12 can optionally be used to set one of at least two operating modes for the air supply to the blowpipes 8.
  • the simplest operating mode provides a direct connection of the pump 10 via the valve 12 and lines 13 and 14 to the blowpipes 8. This operating mode is used during breaks in operation and for shorter times during the operation of the rolling mill in order to remove deposits.
  • a special embodiment of an air blast device essentially consists of a pressure accumulator 15, which is fed by the pump 10 via the line 16 and the valve 12. Inside the pressure accumulator 15 is at least one end of a tube 17, the other end of which is closed and the interior 18 of which is connected to the blowpipes 8 via lines 19 and 14. The end of the tube 17 located in the pressure accumulator 15 is covered by a membrane 20 projecting beyond the tube cross section. The edge of the membrane 20 is contained in the wall of the pressure accumulator 15, so that the membrane 20 divides the pressure accumulator into two partial spaces 21 and 22.
  • the Partial space 21 is delimited by the inner surface of the wall of the pressure accumulator 15, by the outer surface of the tube 17 lying in the pressure accumulator 15 and by the area of the membrane 20 which extends beyond the tube cross section.
  • the subspace 22 is located on the side of the membrane 20 opposite the tube 17 and is used to apply a contact pressure p1 of the membrane 20 to the end of the tube 17.
  • the air supply from the pump 10 via the valve 12, a line, is used to generate the contact pressure p1 24, a throttle valve 26, a check valve 25 and a contact pressure opening 23 to the subspace 22, as well as the venting of the subspace 22 through a throttle cross section 27. If the pressure in the subspace 21 rises above a certain value above the contact pressure p1, the membrane becomes due to its part projecting beyond the pipe cross section, which is under the increased pressure, lifted off, so that the spaces 21 and 18 are connected to one another.
  • a compressed air blast goes from the subspace 21 through the pipe interior 18, through the lines 19 and 14 and through the blow pipes 8 into the return lines 6.
  • the compressed air blast also goes through a line 27 and a check valve 28 into the subspace 22 , where the pressure increase causes the membrane 20 to come into contact with the pipe opening and a subsequent rise in the pressure in the subspace 21 and thus the start of a new pressure surge cycle.
  • a special embodiment according to FIG. 2 provides 8 valve heads 29 at the ends of the blowpipes located in the return lines 6. These valve heads 29 have at least one, but possibly a plurality of nozzle openings 30 pointing in different directions.
  • a blow pipe 8 or a nozzle head 29 could also be moved along the respective return duct 6 if this should be necessary.
  • the device 15-28 is in itself arbitrary Modifiable, for example, that the membrane 20 is loaded by a spring instead of acting on the line 27.
  • a correspondingly controlled valve could also be used, for example with a manually operable control and / or an electronic control instead of the pneumatic interval control shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Cleaning In General (AREA)
  • Disintegrating Or Milling (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Fats And Perfumes (AREA)
  • Crushing And Grinding (AREA)

Abstract

On a flocculation roller (1, 2) with lateral return channels (6), a cleaning device is arranged which has at least one blow pipe (8) and ensures that there are uniform dropping conditions inside the return channels (6). <IMAGE>

Description

Die Erfindung betrifft ein Walzwerk, insbesondere ein Flockierwalzwerk nach dem Oberbegriff des Anspruchs 1.The invention relates to a rolling mill, in particular a flaking mill according to the preamble of claim 1.

Ein Flockierwalzwerk dieser Art ist beispielsweise aus der EP-A-0 271 828 bekannt. Wesentlich daran ist, dass Rückführleitungen vorgesehen sind. Damit diese als Rückführleitungen wirken können, müssen sie oberhalb des Walzenspaltes einmünden, also oberhalb jener Stelle an der die Walzen einander am nächsten kommen. Dabei ist die Einmündungsstelle gut derart wählbar, dass das zu flockierende Gut direkt in den Walzenspalt geführt wird. Allerdings hat sich bei einigen Produkten gezeigt, dass die Einmündungsstelle nur schwer richtig wählbar war. Der Grund für das Einfallen der Partikel in unterschiedlichen Entfernungen vom Stirnende der Walzen war zunächst nicht klar.A flaking mill of this type is known for example from EP-A-0 271 828. It is essential that return lines are provided. So that these can act as return lines, they must open out above the nip, that is, above that point at which the rollers come closest to each other. The junction can be selected such that the material to be flocculated is fed directly into the nip. However, it has been shown for some products that the junction was difficult to choose correctly. The reason for the particles falling in at different distances from the end of the rollers was initially not clear.

Der Erfindung liegt daher die Aufgabe zugrunde, eine weitere Vergleichmässigung der Abnützung der Walzen dadurch zu erreichen, dass die Partikel zum Einfallen in den Walzenspalt in vorbestimmter Entfernung von deren Stirnenden gebracht werden. Dies gelingt in überraschend einfacher Weise durch die kennzeichnenden Merkmale des Anspruches 1.The invention is therefore based on the object of achieving a further equalization of the wear of the rollers in that the particles are brought into the roller gap at a predetermined distance from their ends. This is achieved in a surprisingly simple manner by the characterizing features of claim 1.

In einem ersten Schritt geht die Erfindung nämlich von der durch Untersuchungen gewonnenen Erkenntnis aus, dass gewisse Produkte dazu neigen, sich in den Rückführkanälen an- bzw. abzusetzen, was insbesondere am Rückführkanalboden geschieht, womit die Einmündungsstelle nach oben verschoben wird. Durch die Anordnung mindestens einer Reinigungseinrichtung wird gesichert, dass die Einmündungsstelle stets in derselben Höhe bleibt.In a first step, the invention is based on the knowledge gained through investigations that certain products tend to settle or settle in the return channels, which occurs in particular on the return channel floor, thereby displacing the confluence point. The arrangement of at least one cleaning device ensures that the confluence point always remains at the same height.

Eine solche Reinigungseinrichtung kann im Rahmen der Erfindung verschieden ausgebildet sein und auf verschiedene Weise arbeiten. Beispielsweise kann eine intermittierende Betriebsweise vorgesehen sein, bei der Bürsten, z.B. mit einem Rotationsantrieb, von Zeit zu Zeit in den Rückführschacht getaucht werden. Bevorzugt ist die Reinigungseinrichtung jedoch im Sinne des Anspruches 2 ausgebildet. In diesem Falle wird nämlich eine starre Anordnung erleichtert.Such a cleaning device can be designed differently within the scope of the invention and work in different ways. For example, an intermittent mode of operation can be provided in which brushes, e.g. with a rotary drive, be dipped into the return shaft from time to time. However, the cleaning device is preferably designed in the sense of claim 2. In this case, a rigid arrangement is facilitated.

Die Erfindung wird anhand schematischer Zeichnungen näher erläutert. Es zeigen

Fig. 1
ein Walzwerk im Schrägriss mit einem Diagramm eines Reinigungs-Luftsystems; und
Fig. 2
eine Produktrückführung mit Reinigungs-Blasrohr in Seitenansicht, teilweise im Schnitt.
The invention is explained in more detail with reference to schematic drawings. Show it
Fig. 1
a rolling mill in an oblique crack with a diagram of a cleaning air system; and
Fig. 2
a product return with cleaning blow pipe in side view, partly in section.

Ein Walzwerk gemäss Fig. 1 weist zwei Walzen 1 und 2 auf, wobei vorzugsweise eine Walze als Festwalze ausgebildet ist und die weitere Walze gegen diese parallel gedrückt wird. Zwischen den beiden Walzen 1 und 2 ist ein Walzenspalt 3 gebildet, d.h. ein Bereich, in dem die Körner des Produktes erfasst und gequetscht werden. Oberhalb der Walzen 1 und 2 , vertikal über dem Walzenspaltes 3 ist ein Einfüllkasten 4 mit einer innliegenden Mischeinrichtung vorgesehen. Vom Einfüllkasten 4 wird das zu behandelnde Gut über eine Speisewalze 5 dem Walzenspalt 3 zugeführt.A rolling mill according to FIG. 1 has two rolls 1 and 2, one roll preferably being designed as a fixed roll and the further roll being pressed against it in parallel. A nip 3 is formed between the two rolls 1 and 2, i.e. an area where the grains of the product are caught and crushed. Above the rollers 1 and 2, vertically above the nip 3, a filler box 4 with an internal mixing device is provided. From the filling box 4, the material to be treated is fed to the nip 3 via a feed roller 5.

Zu beiden axialen Enden der Walzen 1 und 2 sind in einem mittleren Bereich zwischen den Walzen 1 und 2 Rückführleitungen 6 vorgesehen, die rinnenförmig ausgebildet sind und oberhalb des Walzenspaltes mit einer Führungsfläche 7 in den Bereich zwischen den Walzen münden. Durch die Rückführung des über den Walzenrand hinausgeförderten Produktes wird die Produktzuführung über die Walzenlänge vergleichmässigt, ja sogar am Walzenende etwas erhöht, sodass eine zu geringe Walzenabnützung an den axialen Enden vermieden wird.To both axial ends of the rolls 1 and 2, return lines 6 are provided in a central area between the rolls 1 and 2, which are channel-shaped and open above the roll gap with a guide surface 7 into the area between the rolls. By returning the product conveyed beyond the edge of the roller, the product feed over the length of the roller is evened out, even at the end of the roller slightly increased so that too little roller wear at the axial ends is avoided.

Die Produkte-Rückführung kann durch das Ansetzen einer Verschmutzungsschicht aus Feinteilen des Produktes in der Rückführleitung 6, insbesondere auf der Führungsfläche 7, beeinträchtigt werden. Um eine solche Verschmutzung zu vermeiden, sind erfindungsgemäss Reinigungsvorrichtungen für die Rückführleitungen vorgesehen. In einer speziellen Ausführungsform ist für jede Rückführleitung 6 mindestens ein Blasrohr 8 vorgesehen, welches mit einem Ende in die Rückführleitung 6 mündet. Zur Speisung der Blasrohre 8 mit Luft ist ein Druckluftgerät vorgesehen, vorzugsweise aus einem Antrieb 9, einer Pumpe 10 und einem Schalter 11, der die Pumpe ein- und ausschaltet, bestehend. Mit einem Ventil 12 kann wahlweise eine von mindestens zwei Betriebsarten der Luftspeisung der Blasrohre 8 eingestellt werden. Die einfachste Betriebsart sieht eine direkte Verbindung der Pumpe 10 über das Ventil 12 und Leitungen 13 und 14 zu den Blasrohren 8 vor. Diese Betriebsart wird während Betriebsunterbrüchen und für kürzere Zeiten während des Betriebs des Walzwerkes verwendet, um Ablagerungsansätze zu beseitigen.The product return can be impaired by the application of a contamination layer made of fine particles of the product in the return line 6, in particular on the guide surface 7. In order to avoid such contamination, cleaning devices for the return lines are provided according to the invention. In a special embodiment, at least one blow pipe 8 is provided for each return line 6, which ends at one end in the return line 6. A compressed air device is provided for feeding the blow pipes 8 with air, preferably consisting of a drive 9, a pump 10 and a switch 11 which switches the pump on and off. A valve 12 can optionally be used to set one of at least two operating modes for the air supply to the blowpipes 8. The simplest operating mode provides a direct connection of the pump 10 via the valve 12 and lines 13 and 14 to the blowpipes 8. This operating mode is used during breaks in operation and for shorter times during the operation of the rolling mill in order to remove deposits.

Eine weitere Betriebsart erzeugt mit der Hilfe einer Luftstoss-Vorrichtung einen intermitierenden Reinigungs-Luftstrom, der während des Walzenbetriebes das Ansetzen von Feinteilen in den Rückführleitungen 6 verhindert. Eine spezielle Ausführung einer Luftstoss-Vorrichtung besteht im Wesentlichen aus einem Druckspeicher 15, der über die Leitung 16 und das Ventil 12 von der Pumpe 10 gespiesen wird. Im Innern des Druckspeichers 15 liegt mindestens das eine Ende eines Rohres 17, dessen anderes Ende verschlossen ist und dessen Innenraum 18 über die Leitungen 19 und 14 mit den Blasrohren 8 verbunden ist. Das im Druckspeicher 15 liegende Ende des Rohres 17 wird von einer über den Rohrquerschnitt hinausragenden Membran 20 überdeckt. Der Rand der Membran 20 ist in der Wandung des Druckspeichers 15 gefasst, sodass die Membran 20 den Druckspeicher in zwei Teilräume 21 und 22 unterteilt. Der Teilraum 21 wird durch die Innenfläche der Wandung des Druckspeichers 15, durch die im Druckspeicher 15 liegende Aussenfläche des Rohres 17 und durch den über den Rohrquerschnitt hinausstehenden Bereich der Membran 20 begrenzt.Another mode of operation generates an intermittent cleaning air flow with the help of an air blast device, which prevents fine particles from accumulating in the return lines 6 during roller operation. A special embodiment of an air blast device essentially consists of a pressure accumulator 15, which is fed by the pump 10 via the line 16 and the valve 12. Inside the pressure accumulator 15 is at least one end of a tube 17, the other end of which is closed and the interior 18 of which is connected to the blowpipes 8 via lines 19 and 14. The end of the tube 17 located in the pressure accumulator 15 is covered by a membrane 20 projecting beyond the tube cross section. The edge of the membrane 20 is contained in the wall of the pressure accumulator 15, so that the membrane 20 divides the pressure accumulator into two partial spaces 21 and 22. The Partial space 21 is delimited by the inner surface of the wall of the pressure accumulator 15, by the outer surface of the tube 17 lying in the pressure accumulator 15 and by the area of the membrane 20 which extends beyond the tube cross section.

Der Teilraum 22 liegt auf der dem Rohr 17 gegenüberliegenden Seite der Membran 20 und dient zum Anlegen eines Anpressdruckes p1 der Membran 20 an das Ende des Rohres 17. Zur Erzeugung des Anpressdruckes p1 dient die Luftzufuhr von der Pumpe 10 über das Ventil 12, eine Leitung 24, ein Drosselventil 26, ein Rückschlagventil 25 und eine Anpressdruck-Oeffnung 23 zum Teilraum 22, sowie die Entlüftung des Teilraumes 22 durch einen Drosselquerschnitt 27. Steigt der Druck im Teilraum 21 über einen bestimmten über dem Anpressdruck p1 liegenden Wert, so wird die Membran infolge ihres über den Rohrquerschnitt hinausragenden Teils, der unter dem erhöhten Druck steht, abgehoben, sodass die Räume 21 und 18 miteinander verbunden werden. Durch diese Verbindung geht vom Teilraum 21 ein Druckluft-Stoss durch den Rohrinnenraum 18, durch die Leitungen 19 und 14 und durch die Blasrohre 8 in die Rückführleitungen 6. Der Druckluft-Stoss geht ebenfalls durch eine Leitung 27 und ein Rückschlagventil 28 in den Teilraum 22, wo die Druckerhöhung ein Anlegen der Membran 20 an die Rohröffnung und ein anschliessendes Ansteigen des Druckes im Teilraum 21 und somit den Beginn eines neuen Druckstoss-Zyklus bewirkt.The subspace 22 is located on the side of the membrane 20 opposite the tube 17 and is used to apply a contact pressure p1 of the membrane 20 to the end of the tube 17. The air supply from the pump 10 via the valve 12, a line, is used to generate the contact pressure p1 24, a throttle valve 26, a check valve 25 and a contact pressure opening 23 to the subspace 22, as well as the venting of the subspace 22 through a throttle cross section 27. If the pressure in the subspace 21 rises above a certain value above the contact pressure p1, the membrane becomes due to its part projecting beyond the pipe cross section, which is under the increased pressure, lifted off, so that the spaces 21 and 18 are connected to one another. As a result of this connection, a compressed air blast goes from the subspace 21 through the pipe interior 18, through the lines 19 and 14 and through the blow pipes 8 into the return lines 6. The compressed air blast also goes through a line 27 and a check valve 28 into the subspace 22 , where the pressure increase causes the membrane 20 to come into contact with the pipe opening and a subsequent rise in the pressure in the subspace 21 and thus the start of a new pressure surge cycle.

Eine spezielle Ausführungsform gemäss Fig. 2 sieht an den in den Rückführleitungen 6 liegenden Enden der Blasrohre 8 Ventilköpfe 29 vor. Diese Ventilköpfe 29 haben mindestens eine, gegebenenfalls aber mehrere in verschiedene Richtungen weisende Düsenöffnungen 30.A special embodiment according to FIG. 2 provides 8 valve heads 29 at the ends of the blowpipes located in the return lines 6. These valve heads 29 have at least one, but possibly a plurality of nozzle openings 30 pointing in different directions.

Im Rahmen der Erfindung sind zahlreiche Varianten denkbar; so könnte auch ein Blasrohr 8 bzw. ein Düsenkopf 29 entlang des jeweiligen Rückführkanales 6 bewegt werden, falls dies erforderlich sein sollte. Auch ist die Einrichtung 15-28 an sich beliebig abwandelbar, z.B. dass an Stelle der Beaufschlagung durch die Leitung 27 die Membrane 20 durch eine Feder belastet wird. Natürlich wäre statt des druckabhängig öffnenden Membranventiles 20 auch ein entsprechend gesteuertes Ventil einsetzbar, z.B. mit einer von Hand aus betätigbaren Steuerung und/oder einer elektronischen Steuerung an Stelle der gezeigten pneumatischen Intervallsteuerung.Numerous variants are conceivable within the scope of the invention; a blow pipe 8 or a nozzle head 29 could also be moved along the respective return duct 6 if this should be necessary. The device 15-28 is in itself arbitrary Modifiable, for example, that the membrane 20 is loaded by a spring instead of acting on the line 27. Of course, instead of the pressure-dependent opening diaphragm valve 20, a correspondingly controlled valve could also be used, for example with a manually operable control and / or an electronic control instead of the pneumatic interval control shown.

Claims (6)

Walzwerk, insbesondere Flockierwalzwerk, für körniges Gut mit zumindest zwei Walzen (1,2), die über eine Druckeinrichtung gegeneinander gehalten bzw. gedrückt sind, mit einer Produktzuführung, über die das Gut beidseitig über die axialen Enden der Walzen hinaus zuführbar ist, sowie mit beidseitig der axialen Enden der Walzen liegenden, den Bereich zwischen den Walzen zumindest teilweise abdeckenden Produktführungen, die als Rückführleitungen (6) für das axial über die Enden der Walzen (1,2) eingespeiste Gut in den Walzenspalt (3) ausgebildet sind, dadurch gekennzeichnet, dass innerhalb wenigstens einer der Rückführleitungen (6) zumindest eine Reinigungsvorrichtung (8) vorgesehen ist.Rolling mill, in particular flaking mill, for granular material with at least two rollers (1, 2) which are held or pressed against one another by a pressure device, with a product feed, via which the material can be fed on both sides beyond the axial ends of the rollers, and with Product guides lying on both sides of the axial ends of the rolls, at least partially covering the area between the rolls, which are designed as return lines (6) for the material fed axially into the roll gap (3) via the ends of the rolls (1, 2), characterized in that , is at least provided within at least one of the return lines (6) a cleaning apparatus (8). Walzwerk nach Anspruch 1, dadurch gekennzeichnet, dass, die Reinigungsvorrichtung jeder Rückführleitung (6) mindestens ein Blasrohr ⁻ 8) aufweist.Rolling mill according to claim 1, characterized in that the cleaning device of each return line (6) has at least one blow pipe ⁻ 8). Walzwerk nach Anspruch 2, dadurch gekennzeichnet, dass, eine Pumpe (10), ein Gebläse od.dgl. mit einem Schalter (11) und gegebenenfalls ein Mehrwegeventil (12) so vorgesehen sind, und dass a) die Pumpe (10), gegebenenfalls über das Ventil (12), direkt mit den Blasrohren (8) verbunden ist und so ein kontinuierlicher Reinigungs-Gasstrom entsteht, oder dass b) die Pumpe (10), gegebenenfalls über das Ventil (12), mit einer Gasstoss-Vorrichtung (15-28) und diese mit den Blasrohren (8) verbunden ist, sodass den Blasrohren (8) ein intermitierender Reinigungs-Gasstrom zugeführt wird. Rolling mill according to claim 2, characterized in that, a pump (10), a blower or the like. with a switch (11) and optionally a multi-way valve (12) are provided and that a) the pump (10), optionally via the valve (12), is connected directly to the blowpipes (8) and so a continuous cleaning gas stream is produced, or that b) the pump (10), optionally via the valve (12), with a gas shock device (15-28) and this is connected to the blowpipes (8), so that the blowpipes (8) are supplied with an intermittent cleaning gas stream . Walzwerk nach Anspruch 3, dadurch gekennzeichnet, dass die Gasstoss-Vorrichtung (15-28) aufweist: - einen Druckspeicher ⁻ 15); - ein Auslassrohr ⁻ 17), dessen eines Ende im Druckspeicher (15) liegt und dessen anderes Ende verschlossen ist und von dem eine Verbindungsleitung (19) zu den Blasrohren (8) führt; - eine einen Referenzdruck bildende Einrichtung (22); und - ein aus einer Schliesslage in eine Offenstellung bewegbares Ventilglied (20) mit zwei einander gegenüberliegenden Flächen, von denen die eine mit dem Druck de Druckspeichers (15), die andere mit dem Referenzdruck belastet ist, wobei das Ventilglied (20) den Auslass aus dem Druckspeicher (15) verschliesst, in Offenstellung freigibt. Rolling mill according to claim 3, characterized in that the gas shock device (15-28) comprises: - a pressure accumulator ⁻ 15); - An outlet pipe ⁻ 17), one end of which is in the pressure accumulator (15) and the other end of which is closed and from which a connecting line (19) leads to the blow pipes (8); - A device (22) forming a reference pressure; and - A valve member (20) movable from a closed position into an open position with two opposing surfaces, one of which is loaded with the pressure of the pressure accumulator (15), the other with the reference pressure, the valve member (20) leaving the outlet from the Pressure accumulator (15) closes, releases in the open position. Walzwerk nach Anspruch 4, dadurch gekennzeichnet, dass wenigstens eines der folgenden Merkmale vorgesehen ist: a) die dem Referenzdruck ausgesetzte Fläche des Ventilgliedes (20) ist grösser als die dem Drucke des Druckspeichers ausgesetzte Fläche; b) das Ventilglied umfasst eine Membrane (20), die vorzugsweise in Schliesslage das innere Ende des Auslassrohres (17) überdeckt und insbesondere es derart überragt, dass die überragende Fläche vom Druckspeicherdruck belastet ist; c) die Referenzeinrichtung weist einen Referenzdruckraum (22) auf, dem über eine Anpressdruck-Oeffnung (23) Druck periodisch zuführbar und über einen Drosselquerschnitt (31) abführbar ist; d) es ist eine Rückführleitung (27) mit einem Rückschlagventil (28) vorgesehen, die vom Inneren (18) des Auslassrohres (17) zur Anpressdruck-Öffnung (23) führt; e) es ist eine Rückführleitung (24) mit einem Drosselventil (26) und einem Rückschlagventil (25) vorgesehen, die mit der den Druckspeicher (15) beliefernden Pumpe (10) verbunden ist und ihr Drosselventil (26 parallel zum Druckspeicher ⁻ 15) zwischen der Pumpe (10) und der Anpressdruck-Öffnung (23) hat. Rolling mill according to claim 4, characterized in that at least one of the following features is provided: a) the surface of the valve member (20) exposed to the reference pressure is larger than the surface exposed to the pressure of the pressure accumulator; b) the valve member comprises a membrane (20), which preferably covers the inner end of the outlet pipe (17) in the closed position and in particular projects beyond it such that the projecting surface is loaded by the pressure accumulator pressure; c) the reference device has a reference pressure chamber (22), to which pressure can be periodically supplied via a contact pressure opening (23) and can be removed via a throttle cross section (31); d) a return line (27) with a check valve (28) is provided, which leads from the inside (18) of the outlet pipe (17) to the contact pressure opening (23); e) there is a return line (24) with a throttle valve (26) and a check valve (25) which is connected to the pump (10) supplying the pressure accumulator (15) and its throttle valve (26 parallel to the pressure accumulator ⁻ 15) between the pump (10) and the contact pressure opening (23). Walzwerk nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass die in den Rückführungsleitungen (6) liegenden Enden der Blasrohre (8) als Ventilköpfe ausgebildet sind, die mindestens eine, gegebenenfalls aber mehrere in verschiedene Richtungen weisende Düsenöffnungen haben.Rolling mill according to one of claims 2 to 5, characterized in that the ends of the blowpipes (8) located in the return lines (6) are designed as valve heads which have at least one, but possibly a plurality of nozzle openings pointing in different directions.
EP92105749A 1991-04-30 1992-04-03 Floculation roller crusher Expired - Lifetime EP0511515B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4114081 1991-04-30
DE4114081A DE4114081A1 (en) 1991-04-30 1991-04-30 BLOCKING ROLLING MILL

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EP0511515A1 true EP0511515A1 (en) 1992-11-04
EP0511515B1 EP0511515B1 (en) 1995-03-01

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EP92105749A Expired - Lifetime EP0511515B1 (en) 1991-04-30 1992-04-03 Floculation roller crusher

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US (1) US5246176A (en)
EP (1) EP0511515B1 (en)
AT (1) ATE119072T1 (en)
DE (2) DE4114081A1 (en)
DK (1) DK0511515T3 (en)
ES (1) ES2071368T3 (en)
GR (1) GR3015257T3 (en)

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NL1026171C2 (en) 2004-05-11 2005-11-14 Stork Titan Bv To shape.
CA2960677C (en) * 2016-04-28 2022-04-12 Gerard DEVLOO Canola seed sample crusher
CN112675970B (en) * 2020-11-30 2022-03-18 苏州太湖美药业有限公司 Pearl powder grinds processing and smashes tip device with wet process

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EP0271828A2 (en) * 1986-12-17 1988-06-22 Gebrueder Buehler Ag Maschinenfabrik Roller mill and method for feeding granular material

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GB1304006A (en) * 1969-08-06 1973-01-24
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EP0271828A2 (en) * 1986-12-17 1988-06-22 Gebrueder Buehler Ag Maschinenfabrik Roller mill and method for feeding granular material

Also Published As

Publication number Publication date
EP0511515B1 (en) 1995-03-01
DE59201499D1 (en) 1995-04-06
DE4114081A1 (en) 1992-11-05
GR3015257T3 (en) 1995-06-30
US5246176A (en) 1993-09-21
ATE119072T1 (en) 1995-03-15
ES2071368T3 (en) 1995-06-16
DK0511515T3 (en) 1995-07-17

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