EP0476249B1 - Device and method for transporting and mixing bulk goods - Google Patents
Device and method for transporting and mixing bulk goods Download PDFInfo
- Publication number
- EP0476249B1 EP0476249B1 EP91111230A EP91111230A EP0476249B1 EP 0476249 B1 EP0476249 B1 EP 0476249B1 EP 91111230 A EP91111230 A EP 91111230A EP 91111230 A EP91111230 A EP 91111230A EP 0476249 B1 EP0476249 B1 EP 0476249B1
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- European Patent Office
- Prior art keywords
- container
- loose material
- conveying
- mixing
- conveyor
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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
- B01F33/405—Mixers using gas or liquid agitation, e.g. with air supply tubes in receptacles having guiding conduits therein, e.g. for feeding the gas to the bottom of the receptacle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/718—Feed mechanisms characterised by the means for feeding the components to the mixer using vacuum, under pressure in a closed receptacle or circuit system
Definitions
- the invention relates to a device for conveying and mixing bulk material, in particular plastic granules.
- a mixing device for bulk material which has a silo-like container with a funnel-shaped bottom and at least one riser is provided within the container, via which the bulk material pneumatically from the bottom area back into the upper part of the container is eligible.
- a cellular wheel sluice is also provided at the outlet of the container, which requests the bulk material to the lower opening of the riser pipe.
- this mixer requires a high level of mechanical components; in particular the cellular wheel sluice rotating in the bulk material is complex and also subject to wear.
- the material must be discharged via the rotary valve, which means that the mixer cannot be emptied quickly.
- a mixing device for bulk material with a container tapering downwards, a filter element arranged inside the container and a conveyor system for feeding the bulk material is known from JP-A-60139327.
- the invention has for its object to avoid the disadvantages mentioned and to provide a device for conveying and mixing bulk material, which is characterized by a simple structure and which at the same time ensures reliable mixing of the bulk material.
- the basic idea and thus an essential advantage of the invention is the linking of the conveyance of the bulk material into the container with the simultaneous mixing of the bulk material conveyed into the container. Due to this simultaneous mixing, several types of bulk goods can be fed into the container in succession via the conveyor pipe system.
- the mixing of the bulk material is achieved in that the material introduction nozzle is designed in such a way that its end extends into the immediate vicinity of the bottom of the container.
- the suction conveyor fan causes the material to deflect as soon as it has left this material inlet nozzle and rises in the container.
- the newly entering material mixes very intensively with the material already present in the container without additional structural elements in the container, such as guide vanes or mixer devices, being necessary.
- this metering can take place via a time control of the delivery valves.
- Such a time control works very reliably without great effort and is suitable for conveying materials which have approximately the same physical properties.
- Another possibility of metering is that the container is arranged on a load cell.
- the gravimetric detection of the conveyed material takes place via this load cell, so that there is the possibility here of making a very precise determination of the conveyed material weight.
- such a mixing and conveying method is used to mix new plastic granulate with granulated regrind. While the granulated regrind is already colored, color additives have to be added to color the new goods. It has proven to be particularly advantageous for the admixing to take place as a function of the quantity of new goods conveyed.
- the non-colored plastic granulate is fed to the container as bulk material and its quantity is recorded gravimetrically. Depending on this quantity delivered, the color additives are dosed via the additional dosing device for the smallest components. This ensures that the color of the mixed material remains constant, even with different mixing ratios of new goods and granulated regrind.
- the device for performing the method is particularly simple.
- the container is equipped with an automatically closing bottom flap, which is controlled by the negative pressure in the container.
- a filter element in the manner of a pocket filter is arranged inside the container and can be cleaned if necessary.
- the conveyor pipe system is directly connected to all of the conveyor pipes at the material inlet connection, the end of which is positioned in the container in the manner according to the invention.
- this device provides that a two-way valve is provided at the outlet of the container. With this two-way valve, the bulk material can either be fed directly into the machine hopper or fed into a collecting container. This collecting container is used to remove residual material from the container and to separate a mixture that does not meet the specified tolerance range.
- a metal detector can be connected upstream of the two-way valve. This has the advantage that any metal particles present in the bulk material are recognized and these metal particles also get into the collecting container by controlling the two-way valve.
- the conveying and mixing device consists of a container 10 which tapers conically downward and has a bottom closure flap 11 at its lower end, which opens automatically when the conveying air is switched off.
- a filter element 12 is arranged within the container and filters the conveying air sucked upward out of the container.
- the conveying air of the suction conveyor is generated by a suction conveyor fan 13, which is provided with a motor 14.
- the conveying air is controlled via a valve 15 which is arranged in the conveying air line 16.
- a material introduction nozzle 17 is inserted, the outlet end 18 of which extends right up to the vicinity of the bottom closure flap 11.
- An additional air valve 24 is also connected to the delivery pipe system via a pipe 23. Ambient air can be sucked into the conveyor pipe system via this additional air valve.
- a conveying and mixing process is as follows.
- the suction conveying fan 13 is switched on, the valve 15 is opened. This creates a negative pressure in the container 10.
- the bottom closure flap 11 remains closed.
- the bulk material 25 flowing in via the material inlet connection 17 flows upward and fills the container.
- the corresponding delivery valve is closed, the auxiliary air valve 24 is opened in the meantime and then the delivery valve for the second type of bulk material is opened.
- this material flows into the container via the material inlet connection, rises there and mixes with the first material.
- the material located in particular in the area of the container wall moves downward, but is again introduced into this upward flow there, so that a good mixing of the two materials is ensured.
- the corresponding conveying valve is switched off and the additional air valve is opened.
- the additional air now flowing in has the effect that all downstream of the delivery valves 21, 22 Pipelines are sucked empty. In addition, this additional air causes further mixing of the materials 25 in the container 10.
- FIG. 2 shows a conveying and mixing device in which the container 10 is arranged on a load cell 26.
- This weighing cell 26 enables gravimetric detection of the bulk materials flowing into the container, so that an exact determination of the mixing ratio of the bulk materials can be carried out.
- a machine hopper 27 is shown, which is arranged directly on an injection molding machine when using the conveying and mixing device in the plastics processing industry, so that the material mixed in the container 10 (plastic granulate) can be fed directly to the machine. If the addition of very small amounts of material is required, for example the addition of color pigments, it is advisable to connect an additional metering device (28) to the conveying and mixing device to maintain the exact mixing ratio.
- Such an additional metering device 28 consists of a container 29, which has a screw dosing device or the like at its outlet, the metered quantity being fed to a downstream weighing container 30, which is also attached to a weighing cell 31.
- the material provided by this metering device reaches the common conveying system via the conveying line 32 and the conveying valve 33.
- a two-way valve 34 can be arranged below the container 10.
- This two way valve has the task of separating out material that flows out of the container 10 and is not intended to get into the machine hopper 27.
- This material is fed via line 35 to a collecting container 36.
- the valve can be operated via a suitable control device.
- the valve is also actuated by means of a metal detector 37. This is arranged above the valve and, when a metal particle is sensed within the bulk material flow, switches this valve over, so that the part of the bulk material flow in which the metal particle is located also the collecting container 36 is fed.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Processing Of Solid Wastes (AREA)
- Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
Description
Die Erfindung betrifft eine Einrichtung zum Fördern und Mischen von Schüttgut, insbesondere Kunststoffgranulat.The invention relates to a device for conveying and mixing bulk material, in particular plastic granules.
Aus der US-A-47 56 624 ist ein Mischgerät für Schüttgut bekannt, welches einen siloartigen Behälter mit einem trichterförmigen Boden aufweist und wobei innerhalb des Behälters mindestens ein Steigrohr vorgesehen ist, über welches das Schüttgut pneumatisch vom Bodenbereich zurück in den oberen Teil des Behälters förderbar ist.From US-A-47 56 624 a mixing device for bulk material is known, which has a silo-like container with a funnel-shaped bottom and at least one riser is provided within the container, via which the bulk material pneumatically from the bottom area back into the upper part of the container is eligible.
Zur ausreichenden Durchmischung des Schüttgutes ist ferner am Auslauf des Behälters eine Zellenradschleuse vorgesehen, welche das Schüttgut an die untere Öffnung des Steigrohrs fordert. Für dieses Mischgerät ist jedoch ein hoher Aufwand an mechanischen Komponenten notwendig; insbesondere die im Schüttgut rotierende Zellenradschleuse ist aufwendig und außerdem verschleißbehaftet. Außerdem muß der Austrag des Materials über die Zellenradschleuse erfolgen, wodurch eine rasche Entleerung des Mischgeräts nicht möglich ist.For sufficient mixing of the bulk material, a cellular wheel sluice is also provided at the outlet of the container, which requests the bulk material to the lower opening of the riser pipe. However, this mixer requires a high level of mechanical components; in particular the cellular wheel sluice rotating in the bulk material is complex and also subject to wear. In addition, the material must be discharged via the rotary valve, which means that the mixer cannot be emptied quickly.
Ein Mischgerät für Schüttgut mit einem nach unten sich verjügenden Behälter, einem innerhalb des Behälters angeordneten Filterelement und einem Fördervohrsystem zum Zuführen des Schüttguts ist aus der JP-A-60139327 bekannt.A mixing device for bulk material with a container tapering downwards, a filter element arranged inside the container and a conveyor system for feeding the bulk material is known from JP-A-60139327.
Der Erfindung liegt die Aufgabe zugrunde, die genannten Nachteile zu vermeiden und eine Einrichtung zum Fördern und Mischen von Schüttgut zu schaffen, welche sich durch einen einfachen Aufbau auszeichnet und welche gleichzeitig eine zuverlässige Durchmischung des Schüttgutes gewährleistet.The invention has for its object to avoid the disadvantages mentioned and to provide a device for conveying and mixing bulk material, which is characterized by a simple structure and which at the same time ensures reliable mixing of the bulk material.
Diese Aufgabe wird durch den Anspruch 1 gelöst.This object is solved by claim 1.
Grundgedanke und damit wesentlicher Vorteil der Erfindung ist die Verknüpfung der Förderung des Schüttguts in den Behälter mit der gleichzeitigen Durchmischung des in den Behälter geförderten Schüttgutes. Aufgrund dieser gleichzeitigen Durchmischung können mehrere Schüttgutarten nacheinander dem Behälter über das Förderrohrsystem zugeführt werden. Das Mischen des Schüttgutes wird dadurch erreicht, daß der Materialeinführungsstutzen derart ausgestaltet ist, daß sein Ende bis in unmittelbare Nähe des Bodens des Behälters heranreicht. Durch das Saugfördergebläse wird beim Einfüllen des Schüttgutes in den Behälter über den Materialeinführungsstutzen bewirkt, daß das Material, sobald es diesen Materialeinführungsstutzen verlassen hat, eine Umlenkung erfährt und im Behälter nach oben steigt. Während dieser Bewegung durchmischt sich das neu eintretende Material mit dem bereits im Behälter vorhandenen Material sehr intensiv, ohne daß zusätzliche konstruktive Elemente im Behälter, wie beispielweise Leitschaufeln oder Mischervorrichtungen, nötig wären.The basic idea and thus an essential advantage of the invention is the linking of the conveyance of the bulk material into the container with the simultaneous mixing of the bulk material conveyed into the container. Due to this simultaneous mixing, several types of bulk goods can be fed into the container in succession via the conveyor pipe system. The mixing of the bulk material is achieved in that the material introduction nozzle is designed in such a way that its end extends into the immediate vicinity of the bottom of the container. When the bulk material is poured into the container via the material inlet nozzle, the suction conveyor fan causes the material to deflect as soon as it has left this material inlet nozzle and rises in the container. During this movement, the newly entering material mixes very intensively with the material already present in the container without additional structural elements in the container, such as guide vanes or mixer devices, being necessary.
Es hat sich als zweckmäßig erwiesen, den Abstand zwischen dem Ende des Materialeinführungsstutzens und dem Boden bzw. der Bodenverschlußklappe so zu wählen, daß dieser Abstand kleiner als der zweifache Durchmesser des Materialeinführungsstutzens ist.It has proven to be expedient to choose the distance between the end of the material inlet connector and the floor or the bottom closure flap such that this distance is less than twice the diameter of the material inlet connector.
Gemäß einer Weiterbildung der Erfindung wird vorgeschlagen, die verschiedenen Schüttgüter nacheinander dem Behälter zuzuführen. Während der Umschaltung der Förderventile könnte eine kurze Zeitphase entstehen, in der keine Förderluft durch den Behälter strömt. Um diese Zeitphase zu überbrücken, wird ein Zusatzluftventil geöffnet. Durch dieses strömt Luft in den Behälter ein, so daß der Mischvorgang nicht unterbrochen wird. Dieses Zusatzluftventil kann auch weiterbildungsgemäß dazu verwendet werden, daß nach Beendigung des Förderns von Schüttgut die Förderrohre geleert werden und außerdem der Mischvorgang ohne weitere Materialzufuhr verlängert wird.According to a development of the invention, it is proposed to feed the various bulk materials to the container one after the other. During the changeover of the delivery valves, a short period of time could arise in which no delivery air flows through the container. An auxiliary air valve is opened to bridge this time phase. Through this air flows into the container so that the mixing process is not interrupted. This additional air valve can also be used according to a further development so that the conveying pipes are emptied after the bulk material has been conveyed and, in addition, the mixing process is extended without any further material supply.
Weiterbildungsgemäß werden zur Dosierung der Schüttgüter verschiedene alternative Lösungen aufgezeigt. Zum einen kann diese Dosierung über eine Zeitsteuerung der Förderventile erfolgen. Eine solche Zeitsteuerung arbeitet ohne großen Aufwand sehr zuverlässig und eignet sich für die Förderung von Materialien, die annähernd die gleichen physikalischen Eigenschaften aufweisen.According to a further development, various alternative solutions for dosing the bulk goods are shown. On the one hand, this metering can take place via a time control of the delivery valves. Such a time control works very reliably without great effort and is suitable for conveying materials which have approximately the same physical properties.
Eine weitere Möglichkeit der Dosierung besteht darin, daß der Behälter an einer Wägezelle angeordnet ist. Über diese Wägezelle erfolgt die gravimetrische Erfassung des geförderten Materials, so daß hier die Möglichkeit besteht, eine sehr genaue Bestimmung des geförderten Materialgewichts vorzunehmen.Another possibility of metering is that the container is arranged on a load cell. The gravimetric detection of the conveyed material takes place via this load cell, so that there is the possibility here of making a very precise determination of the conveyed material weight.
Insbesondere dann, wenn Material in sehr geringen Mengen zudosiert werden muß, beispielsweise Einfärbepigmente für Kunststoffgranulat, ist es zweckmäßig, eine zusätzliche Dosiereinrichtung dem Behälter vorzuschalten, über welche diese Kleinstkomponente dosiert wird.In particular when material has to be added in very small quantities, for example coloring pigments for plastic granules, it is advisable to connect an additional metering device to the container, via which this small component is metered.
Bei der Anwendung der Erfindung in der kunststoffverarbeitenden Industrie wird ein solches Misch- und Förderverfahren dazu benutzt, neuwertiges Kunststoffgranulat mit granuliertem Regenerat zu mischen. Während das granulierte Regenerat schon eingefärbt ist, müssen für die Einfärbung der Neuware noch Farbzusätze zugemischt werden. Es hat sich als besonders vorteilhaft erwiesen, daß die Zumischung in Abhängigkeit von der geförderten Menge der Neuware erfolgt. Hierzu wird das nichteingefärbte Kunststoffgranulat als Schüttgut dem Behälter zugeführt und dessen Menge gravimetrisch erfaßt. In Abhängigkeit von dieser geförderten Menge werden die Farbzusätze über die zusätzliche Dosiereinrichtung für die Kleinstkomponenten dosiert. Damit ist auch bei unterschiedlichen Mischungsverhältnissen von Neuware und von granuliertem Regenerat gewährleistet, daß die Einfärbung des gemischten Materials konstant bleibt.When the invention is used in the plastics processing industry, such a mixing and conveying method is used used to mix new plastic granulate with granulated regrind. While the granulated regrind is already colored, color additives have to be added to color the new goods. It has proven to be particularly advantageous for the admixing to take place as a function of the quantity of new goods conveyed. For this purpose, the non-colored plastic granulate is fed to the container as bulk material and its quantity is recorded gravimetrically. Depending on this quantity delivered, the color additives are dosed via the additional dosing device for the smallest components. This ensures that the color of the mixed material remains constant, even with different mixing ratios of new goods and granulated regrind.
Die Einrichtung zur Durchführung des Verfahrens ist besonders einfach ausgestaltet. Der Behälter ist mit einer selbsttätig sich schließenden Bodenklappe versehen, die durch den Unterdruck im Behälter gesteuert wird.The device for performing the method is particularly simple. The container is equipped with an automatically closing bottom flap, which is controlled by the negative pressure in the container.
Ein Filterelement in der Art eines Taschenfilters ist innerhalb des Behälters angeordnet und kann bei Bedarf abgereinigt werden. Das Förderrohrsystem ist direkt mit sämtlichen Förderrohren an den Materialeinführungsstutzen angeschlossen, dessen Ende in erfindungsgemäßer Weise im Behälter positioniert ist.A filter element in the manner of a pocket filter is arranged inside the container and can be cleaned if necessary. The conveyor pipe system is directly connected to all of the conveyor pipes at the material inlet connection, the end of which is positioned in the container in the manner according to the invention.
Eine Weiterbildung dieser Einrichtung sieht vor, daß an dem Auslauf des Behälters ein Zweiwegeventil vorgesehen ist. Über dieses Zweiwegeventil kann das Schüttgut entweder direkt in den Maschinentrichter eingeleitet werden oder einem Auffangbehälter zugeführt werden. Dieser Auffangbehälter dient dazu, Restmaterial aus dem Behälter zu entnehmen, sowie eine Mischung, die nicht dem vorgegebenen Toleranzrahmen entspricht, auszusondern.A further development of this device provides that a two-way valve is provided at the outlet of the container. With this two-way valve, the bulk material can either be fed directly into the machine hopper or fed into a collecting container. This collecting container is used to remove residual material from the container and to separate a mixture that does not meet the specified tolerance range.
Dem Zweiwegeventil kann ein Metalldetektor vorgeschaltet sein. Dies hat den Vorteil, daß evtl. in dem Schüttgut vorhandene Metallteilchen erkannt werden und über eine Steuerung des Zweiwegeventils diese Metallteilchen ebenfalls in den Auffangbehälter gelangen.A metal detector can be connected upstream of the two-way valve. This has the advantage that any metal particles present in the bulk material are recognized and these metal particles also get into the collecting container by controlling the two-way valve.
Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen näher erläutert. Es zeigt:
- Figur 1
- den schematischen Aufbau einer Förder- und Mischeinrichtung
- Figur 2
- eine Förder- und Mischeinrichtung mit einer gravimetrischen Mengenerfassung
- Figur 3
- eine an den Auslaß einer Förder- und Mischeinrichtung angeschlossene Materialweiche.
- Figure 1
- the schematic structure of a conveyor and mixing device
- Figure 2
- a conveyor and mixing device with gravimetric quantity recording
- Figure 3
- a material switch connected to the outlet of a conveying and mixing device.
Die Förder- und Mischeinrichtung gemäß Figur 1 besteht aus einem Behälter 10, der sich nach unten hin konisch verjüngt und an seinem unteren Ende eine Bodenverschlußklappe 11 aufweist, welche sich beim Abschalten der Förderluft selbsttätig öffnet. Innerhalb des Behälters ist ein Filterelement 12 angeordnet, welches die nach oben aus dem Behälter abgesaugte Förderluft filtert. Die Förderluft der Saugförderung wird über ein Saugfördergebläse 13, welches mit einem Motor 14 versehen ist, erzeugt. Die Förderluft wird über ein Ventil 15, das in der Förderluftleitung 16 angeordnet ist, gesteuert. Im Behälter 10 ist ein Materialeinführungsstutzen 17 hineingeführt, dessen Auslaßende 18 bis unmittelbar in die Nähe der Bodenverschlußklappe 11 heranreicht.The conveying and mixing device according to FIG. 1 consists of a
In diesen Materialeinführungsstutzen 17 münden Förderrohre 19, 20, die jeweils mit einem Förderventil 21, 22 versehen sind.
Diese Rohre sind an hier nicht dargestellten Materialsilos angeschlossen. Über eine Rohrleitung 23 ist ferner ein Zusatzluftventil 24 an dem Förderrohrsystem angeschlossen. Über dieses Zusatzluftventil kann Umgebungsluft in das Förderrohrsystem hineingesaugt werden.These pipes are connected to material silos, not shown here. An
Ein Förder- und Mischvorgang stellt sich folgendermaßen dar. Das Saugfördergebläse 13 wird eingeschaltet, das Ventil 15 geöffnet. Hierdurch entsteht ein Unterdruck in dem Behälter 10. Sobald eines der Förderventile 21 oder 22 geöffnet wird, strömt Schüttgut 25 aus einem Vorratssilo über den Materialeinführungsstutzen 17 in den Behälter 10. Aufgrund des im Behälter 10 erzeugten Unterdruckes bleibt die Bodenverschlußklappe 11 geschlossen. Das über den Materialeinführungsstutzen 17 einströmende Schüttgut 25 strömt nach oben und füllt den Behälter. Sobald eine ausreichende Menge dieses Materials im Behälter vorhanden ist, wird das entsprechende Förderventil geschlossen, zwischenzeitlich das Zusatzluftventil 24 geöffnet und anschließend das Förderventil für die zweite Schüttgutart geöffnet. Nunmehr strömt aufgrund des Unterdrucks im Behälter 10 dieses Material über den Materialeinführungsstutzen in den Behälter, steigt dort nach oben und vermischt sich mit dem ersten Material. Bei dieser Aufwärtsbewegung des Materials bewegt sich das insbesondere im Bereich der Behälterwandung befindliche Material nach unten, wird dort jedoch wieder in dieser Aufwärtsstrom mit hineingeführt, so daß damit eine gute Durchmischung der beiden Materialien gewährleistet ist.A conveying and mixing process is as follows. The
Nachdem die erforderliche Materialmenge des zweiten Materials ebenfalls in den Behälter gefördert wurde, wird das entsprechende Förderventil abgeschaltet und das Zusatzluftventil geöffnet. Die nunmehr einströmende Zusatzluft bewirkt, daß sämtliche den Förderventilen 21, 22 nachgeordnete Rohrleitungen leergesaugt werden. Außerdem bewirkt diese Zusatzluft noch eine weitere Vermischung der in dem Behälter 10 befindlichen Materialien 25.After the required amount of material of the second material has also been conveyed into the container, the corresponding conveying valve is switched off and the additional air valve is opened. The additional air now flowing in has the effect that all downstream of the
Die Figur 2 zeigt eine Förder- und Mischeinrichtung, bei welcher der Behälter 10 an einer Wägezelle 26 angeordnet ist. Durch diese Wägezelle 26 ist eine gravimetrische Erfassung der in den Behälter einströmenden Schüttgüter möglich, so daß damit eine genaue Bestimmung des Mischungsverhältnisses der Schüttgüter durchgeführt werden kann.FIG. 2 shows a conveying and mixing device in which the
Unterhalb des Behälters 10 ist ein Maschinentrichter 27 dargestellt, der bei der Anwendung der Förder- und Mischeinrichtung in der kunststoffverarbeitenden Industrie unmittelbar auf einer Spritzgußmaschine angeordnet ist, so daß das in dem Behälter 10 gemischte Material (Kunststoffgranulat) direkt der Maschine zugeführt werden kann. Sofern die Zudosierung sehr geringer Mengen von Material erforderlich ist, beispielsweise die Zudosierung von Farbpigmenten, ist es zweckmäßig, zur Einhaltung des genauen Mischungsverhältnisses eine zusätzliche Dosiereinrichtung (28) der Förder- und Mischeinrichtung vorzuschalten.Below the
Eine solche zusätzliche Dosiereinrichtung 28 besteht aus einem Behälter 29, der an seinem Auslauf einen Schneckendosierer oder ähnliches aufweist, wobei die dosierte Menge einem nachgeschalteten Wiegebehälter 30, der ebenfalls an einer Wägezelle 31 befestigt ist, zugeführt wird. Das von dieser Dosiereinrichtung bereitgestellte Material gelangt über die Förderleitung 32 und das Förderventil 33 in das gemeinsame Fördersystem.Such an
Gemäß Figur 3 kann unterhalb des Behälters 10 ein Zweiwegeventil 34 angeordnet sein. Dieses Zweiwegeventil hat die Aufgabe, Material, welches aus dem Behälter 10 ausströmt und nicht in den Maschinentrichter 27 gelangen soll, auszusondern. Dieses Material wird über die Leitung 35 einem Auffangbehälter 36 zugeführt. Das Ventil kann über eine geeignete Steuereinrichtung betätigt werden. Außerdem erfolgt auch eine Betätigung des Ventils mittels eines Metalldetektors 37. Dieser ist oberhalb des Ventils angeordnet und schaltet bei der Sensierung eines Metallteilchens innerhalb des Schüttgutstroms dieses Ventil um, so daß der Teil des Schüttgutstroms, in dem sich das Metallteilchen befindet, ebenfalls dem Auffangbehälter 36 zugeführt wird.According to FIG. 3, a two-
Claims (11)
- Arrangement for conveying and mixing loose material, comprising- a downwardly tapering container (10) with a bottom closure flap (11),- a suction conveyor fan (13), which is disposed outside the container (10) and connected to the upper portion of the container (10) for the evacuation of conveying air,- a filtering means (12), which is disposed inside the container, for filtering the evacuated conveying air,- a conveyor tube system for supplying the loose material to be conveyed, at least two conveyor tubes (19, 20) being provided and each having a respective conveyor valve (21, 22),
characterised in that- an additional air valve (24) communicates with the conveyor tube system,- all of the conveyor tubes terminate in a material lead-in pipe (17), which is introduced into the container (10) and the open end of which extends in the container (10) directly to the base closure flap (11) so that the conveyed loose material (25), entering through the material lead-in pipe (17), passes directly into the region of the base closure flap (11) and is deflected there and mixed with already present loose material during the upward movement in the container (10). - Conveying and mixing arrangement according to claim 1, characterised in that a two-way valve (34) is connected downstream of the outlet of the container (10) for the guidance of the material flow into a subsequently added machine funnel (27) or into a collecting vessel (36).
- Conveying and mixing arrangement according to claim 2, characterised in that a metal detector (37) is disposed between the outlet and the two-way valve (34), said metal detector sensing metal particles within the loose material and changing-over the two-way valve (34) upon the detection of metal particles in such a manner that the material, in which the metal particles are situated, is supplied to the collecting vessel (36).
- Apparatus comprising a plurality of arrangements according to one of claims 1 to 3, wherein these arrangements are provided in a multiplex conveyor system and connected to a single evaluation and control system which controls the individual arrangements in succession in the multiplex process.
- Method of conveying and mixing loose material by employing the arrangement according to claim 1, characterised in that the additional air valve (24) is opened when the conveyor valves (21, 22) are changed-over from supplying a first loose material to supplying a second loose material, so that the air flow is not interrupted and the pneumatic mixing operation is maintained.
- Method of conveying and mixing loose material according to claim 5, characterised in that the additional air valve (24) is opened after the conveyance of loose material has terminated in order to ensure that all of the conduction means downstream of the conveyor valves (21, 22) are emptied.
- Method of conveying and mixing loose material according to one of claims 5 and 6, characterised in that the additional air valve (24) is opened after the end of the conveyance of loose material, and the mixing operation can be extended as desirable without the continued conveyance of loose material.
- Method of conveying and mixing loose material according to one of claims 5 to 7, characterised in that the loose materials to be mixed are apportioned via a time control means for the conveyor valves (21, 22).
- Method of conveying and mixing loose material according to one of claims 5 to 8, characterised in that the loose materials to be conveyed are apportioned by means of at least one weighing cell (26), which is disposed on the container (10), via the gravimetric determination of the conveyance weight.
- Method of conveying and mixing loose material according to one of claims 5 to 9, characterised in that minute components are apportioned via an additional apportioning means (28), which is incorporated in the corresponding feed pipe (32).
- Method of conveying and mixing loose material according to claim 10, characterised in that a minute component is apportioned in dependence on the gravimetrically determined quantity of one type of loose material present in the container or of all the loose material accumulated in the container.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4029902A DE4029902C2 (en) | 1990-09-21 | 1990-09-21 | Process for conveying and mixing bulk goods |
| DE4029902 | 1990-09-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0476249A1 EP0476249A1 (en) | 1992-03-25 |
| EP0476249B1 true EP0476249B1 (en) | 1994-10-12 |
Family
ID=6414677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91111230A Expired - Lifetime EP0476249B1 (en) | 1990-09-21 | 1991-07-05 | Device and method for transporting and mixing bulk goods |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0476249B1 (en) |
| AT (1) | ATE112699T1 (en) |
| DE (2) | DE4029902C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108993287A (en) * | 2018-07-20 | 2018-12-14 | 成都恩承科技股份有限公司 | Pneumatic molten medicine device and molten prescription method |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19639856C2 (en) * | 1996-09-27 | 2001-03-15 | Gert Streicher | Method and device for conveying fine materials as an aggregate in granular products |
| EP0997184A1 (en) * | 1998-10-02 | 2000-05-03 | Mann + Hummel ProTec GmbH | Device for transporting and mixing bulk goods |
| US8926907B2 (en) | 2004-03-23 | 2015-01-06 | W. R. Grace & Co.-Conn | System and process for injecting catalyst and/or additives into a fluidized catalytic cracking unit |
| US9504975B2 (en) | 2004-03-23 | 2016-11-29 | W. R. Grace & Co.-Conn. | System and process for injecting catalyst and/or additives into a fluidized catalytic cracking unit |
| US7846399B2 (en) | 2004-03-23 | 2010-12-07 | W.R. Grace & Co.-Conn. | System and process for injecting catalyst and/or additives into a fluidized catalytic cracking unit |
| DE102007046622A1 (en) * | 2007-09-27 | 2009-04-02 | Mann + Hummel Protec Gmbh | Device for conveying and mixing bulk material |
| DE102009015271B4 (en) | 2009-04-01 | 2014-04-03 | Protec Polymer Processing Gmbh | Machining device for bulk material |
| BR112014009578B1 (en) | 2011-10-18 | 2021-03-30 | W. R. Grace & Co. -Conn | SYSTEMS FOR THE INJECTION OF CATALYSTS AND / OR ADDITIVES IN A FLUIDIZED CATALYTIC CRACKING UNIT AND METHODS OF MANUFACTURE AND USE OF THE SAME |
| DE102012208717A1 (en) * | 2012-05-24 | 2013-11-28 | Coperion Gmbh | Weighing/mixing-handling device for e.g. throughmixing of plastic granulates and additives into polymer mixture, has weighing device weighing bulk materials, and gas supply nozzles introducing mixed gas into interior for mixing materials |
| CN111013468A (en) * | 2020-03-02 | 2020-04-17 | 河北工业大学 | Boiling type mixer |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH412811A (en) * | 1962-11-06 | 1966-05-15 | Ruetschi Ag Pumpenbau K | Method of mixing and device for carrying out the method |
| FR1460098A (en) * | 1965-10-14 | 1966-11-25 | Advanced pneumatic mixing device | |
| DE1506960A1 (en) * | 1967-04-20 | 1969-07-10 | Miag Muehlenbau & Ind Gmbh | Separation and removal vessel for pneumatically conveyed bulk material |
| GB1249827A (en) * | 1969-08-21 | 1971-10-13 | Simon Ltd Henry | Improvements in or relating to mixing solids with liquids |
| DE2026337A1 (en) * | 1970-05-29 | 1971-12-09 | Fa Franz Josef Waschle, 7980 Ra vensburg | Pneumatic mixing appts. - placed above helical screw feed of plastics extruder |
| US3707829A (en) * | 1970-10-21 | 1973-01-02 | Eastman Kodak Co | Apparatus for injecting dry solid particles into a liquid including noise muffling means |
| US3819157A (en) * | 1973-02-01 | 1974-06-25 | Universal Oil Prod Co | Mixing apparatus |
| DE2422963B1 (en) * | 1974-05-11 | 1975-06-12 | Dietrich Reimelt Kg, 6074 Urberach | Pneumatic mixing and conveying system for (volatile bulk goods |
| DE2544441A1 (en) * | 1975-10-04 | 1977-04-14 | Motan Gmbh | DEVICE FOR MIXING GRANULAR AND / OR POWDERED SUBSTANCES |
| DE2544716A1 (en) * | 1975-10-07 | 1977-04-21 | Zimmermann Azo Maschf | SUCTION CONVEYOR SYSTEM |
| DE2618541B2 (en) * | 1976-04-28 | 1980-08-14 | Azo-Maschinenfabrik Adolf Zimmermann Gmbh, 6960 Osterburken | Filter separator for a pneumatic bulk material conveyor system |
| US4441822A (en) * | 1980-09-03 | 1984-04-10 | Foster Wheeler Energy Corporation | Apparatus for mixing and distributing solid particulate material |
| JPS57171429A (en) * | 1981-04-13 | 1982-10-22 | Glatt Gmbh | Rotary disk type granulator |
| DE3234911A1 (en) * | 1982-09-21 | 1984-03-22 | Herbert 7853 Steinen Hüttlin | FLUID BED APPARATUS |
| DE3620749A1 (en) * | 1986-06-20 | 1987-12-23 | Waeschle Maschf Gmbh | ENVIRONMENTAL MIXER FOR SCHUETTGUT |
-
1990
- 1990-09-21 DE DE4029902A patent/DE4029902C2/en not_active Expired - Lifetime
-
1991
- 1991-07-05 AT AT91111230T patent/ATE112699T1/en active
- 1991-07-05 EP EP91111230A patent/EP0476249B1/en not_active Expired - Lifetime
- 1991-07-05 DE DE59103219T patent/DE59103219D1/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108993287A (en) * | 2018-07-20 | 2018-12-14 | 成都恩承科技股份有限公司 | Pneumatic molten medicine device and molten prescription method |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59103219D1 (en) | 1994-11-17 |
| DE4029902C2 (en) | 1996-10-17 |
| DE4029902A1 (en) | 1992-03-26 |
| ATE112699T1 (en) | 1994-10-15 |
| EP0476249A1 (en) | 1992-03-25 |
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