EP0320884A1 - Quick-release aerator - Google Patents

Quick-release aerator Download PDF

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Publication number
EP0320884A1
EP0320884A1 EP88120822A EP88120822A EP0320884A1 EP 0320884 A1 EP0320884 A1 EP 0320884A1 EP 88120822 A EP88120822 A EP 88120822A EP 88120822 A EP88120822 A EP 88120822A EP 0320884 A1 EP0320884 A1 EP 0320884A1
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EP
European Patent Office
Prior art keywords
compressed air
storage container
valve
air supply
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88120822A
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German (de)
French (fr)
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EP0320884B1 (en
Inventor
Udo Leibling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Agrichema Materialflusstechnik GmbH
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Agrichema Materialflusstechnik GmbH
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Application filed by Agrichema Materialflusstechnik GmbH filed Critical Agrichema Materialflusstechnik GmbH
Priority to AT88120822T priority Critical patent/ATE77339T1/en
Publication of EP0320884A1 publication Critical patent/EP0320884A1/en
Application granted granted Critical
Publication of EP0320884B1 publication Critical patent/EP0320884B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
    • B65D88/70—Large containers characterised by means facilitating filling or emptying preventing bridge formation using fluid jets
    • B65D88/703—Air blowing devices, i.e. devices for the sudden introduction of compressed air into the container

Definitions

  • the invention relates to an air blast device according to the preamble of claim 1.
  • Air blast devices are used to dissolve or remove material build-up and material caking of bulk goods in bunkers, hoppers, silos and the like. Like. Used. This is achieved by strong bursts of compressed air escaping suddenly through a blow-out opening of the device, the compressed air stored in the storage container of the air blast device escaping through the blow-out opening in a fraction of a second. Considerable impact forces are developed.
  • the air blown suddenly by the air blast device onto the bulk material is more or less returned as a result of the recoil effect and can get into the interior of the storage container via the blowout opening, it is necessary to blow the air out through the closing piston at lightning speed after the air has been ejected of the device to prevent destruction within the air blast device.
  • this is achieved in that the multi-way valve is switched in a flash from the venting position to the switching position after firing, in which compressed air is supplied to the storage container. In this position of the multi-way valve, the piston of the valve unit is pressed into its closed position and held there.
  • the outlet opening will no longer or not sufficiently sealed by the piston.
  • the air blast device When the air blast device is fired, the air can then enter the interior of the device as a result of recoil, which is associated with a considerable risk to the device. If the air blast device has to be removed from the compressed air supply, e.g. due to any maintenance work or due to repositioning of the air blast device itself, it is necessary for safety reasons to fire the air blast device again, but after the firing process, due to the shutoff of the compressed air supply, no pressure acts on the piston , so that it is not placed in its closed position.
  • the object of the invention is to develop an air blast device such that a safe return of the piston of the air blast device into its closed position is ensured even in the event of faults in the compressed air supply.
  • a compressed air reservoir and a non-return valve are arranged in front of the multi-way valve, the non-return valve permitting the compressed air in the direction of the storage container, but blocking a compressed air backflow in the other direction.
  • the size of the compressed air reservoir is dimensioned in such a way that a sufficient closing force is available depending on the piston surface acted upon.
  • the volume of the compressed air reservoir designed as a storage pot is approximately 0.3 liters, as a result of which a closing force of approximately 40 kg is exerted on the piston. Furthermore, as a result of this piston reset, a piston ensures reliable closing of a piston even in the event of fluctuations in the compressed air supply.
  • a structurally compact embodiment is characterized in that the storage pot is integrated in the storage container.
  • the storage pot can be inserted into a corresponding opening in the jacket of the storage container, and the storage pot can be fastened in a suitable manner, in particular by means of a tight screw or welded connection.
  • Fig. 1 shows a schematic representation of a storage container 1, which is fed via a compressed air supply line 2 with compressed air from an external compressed air source, not shown.
  • a 3-way valve is arranged, which ensures the compressed air supply via line 2 in the storage tank 1 in the switching position designated AR and in the switching position designated AP blocks the connection to the external compressed air source and the compressed air supply line 2 and thus the Storage tank 1 vented.
  • connection 4 at the upper end of the storage container 1 extends into the interior of the storage container with a connecting tube designated 5, which extends to a guide bush 6, in which a piston 7 is slidably guided.
  • the space VR above the piston 7 is connected to the interior of the storage container 1 via a pressure relief valve, not shown, in particular a pressure membrane valve.
  • the piston 7 closes the outlet opening 9 of the air blast device as a result of resting on a valve seat 8.
  • the operation of the air blast device is as follows. After the storage tank 1 has been filled appropriately via the compressed air supply line (valve position AR), the air blast device is fired by switching the multi-way valve 3 to the venting position (position AP of the valve). This results in a venting of the upper chamber VR of the valve unit denoted by 10. Since the pressure inside the storage container 11 acts on the piston 7 via an opening 11 formed on the guide bush 6, in particular special on its exposed, annular lower end face, the piston 7 is moved up in a flash, so that the blow-out opening 9 is suddenly released and the compressed air in the storage container 1 suddenly expands in the direction of the blow-out point.
  • the compressed air supply takes place and the piston 7 is pressed onto the valve seat 8, so that the storage container 8 is filled again via the pressure membrane valve in the guide bushing 6 or the valve unit 10 and thus for another Firing process is ready.
  • a compressed air reservoir is arranged in front of the multi-way valve 3, which in the exemplary embodiment shown is formed by a cylindrical reservoir pot 12.
  • a check valve is arranged in front of the storage pot 12, which prevents compressed air from flowing backwards again in the direction of the compressed air source.
  • this check valve is formed by a check valve designated 13, which allows the compressed air supply to the storage container 1 unhindered, but blocks against the direction of the compressed air supply, as can be seen symbolically from the drawing of the valve 13.
  • This compressed air reservoir 12 ensures that a certain amount of compressed air is provided in front of the multi-way valve 3 in every operating state. If there is a failure in the compressed air network or the air blast device is switched off from the compressed air network and then the air blast device is fired, then it is always ensured that, as a result of the compressed air stored in the compressed air reservoir 12, the piston 7 is pressed back down into its closed position onto the valve seat 8 and is thus reset into its closed position. This also prevents recoil of the air shot into a bunker in the direction of the interior of the air blast device due to the piston 7 firmly seated on the valve seat 8.
  • the volume of the accumulator is adapted to the required closing force.
  • the volume of the storage pot 12 is approximately 0.3 liters, as a result of which a restoring force of 40 kp is exerted on the piston, which is sufficient as the closing force.
  • the storage pot 12 and the check valve 3 can be connected to the line 2 via screw connections, which are denoted by 15 in FIG. 1. This makes it easy to retrofit existing air blast devices with this unit.
  • FIG. 2 shows an embodiment in which the storage pot 12 is integrated directly into the storage container 1. According to the illustration, the pot 12 is for the most part embedded in the storage container 1 and firmly connected to the storage container 1 via a tight screw or welded connection 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)

Abstract

The quick-release aerator for eliminating material accumulations of bulk material in silos or the like has a compressed-air feedline (2) leading to a storage container (1), in which a multiway-valve (3) is arranged. Provided upstream of the multiway valve are a compressed air store (12) and a non-return valve (13), the non-return valve (13) locking in a direction counter to the compressed air feed. As a result of the compressed air store (12), for each operating state a particular amount of compressed air is provided which is sufficient to press the closing piston (7) of the quick-release aerator into its closed position. <IMAGE>

Description

Die Erfindung betrifft ein Luftstoßgerät gemäß dem Ober­begriff des Patentanspruches 1.The invention relates to an air blast device according to the preamble of claim 1.

Luftstoßgeräte werden zum Auflösen bzw. Beseitigen von Materialaufstauungen und Materialanbackungen von Schütt­gütern in Bunkern, Trichtern, Silos u. dgl. verwendet. Dies wird durch starke, schlagartig durch eine Ausblas­öffnung des Gerätes entweichende Druckluftstöße erreicht, wobei im Bruchteil einer Sekunde die im Speicherbehälter des Luftstoßgerätes gespeicherte Druckluft über die Aus­blasöffnung entweicht. Es werden hierbei erhebliche Stoß­kräfte entwickelt.Air blast devices are used to dissolve or remove material build-up and material caking of bulk goods in bunkers, hoppers, silos and the like. Like. Used. This is achieved by strong bursts of compressed air escaping suddenly through a blow-out opening of the device, the compressed air stored in the storage container of the air blast device escaping through the blow-out opening in a fraction of a second. Considerable impact forces are developed.

Da je nach Stärke der Materialaufstauungen die schlagartig vom Luftstoßgerät auf das Schüttgut geblasene Luft mehr oder weniger infolge Rückstoßwirkung wieder zurückgeführt wird und über die Ausblasöffnung in das Innere des Speicher­behälters gelangen kann, ist es erforderlich, nach dem Ausstoßen der Luft blitzschnell die Ausblasöffnung über den Schließkolben des Gerätes zu verschließen, um Zerstörungen innerhalb des Luftstoßgerätes zu vermeiden. Bei bekannten Geräten wird dies dadurch erreicht, daß das Mehrwegeventil nach dem Abschießen blitzartig von der Ent­lüftungsstellung in die Schaltstellung umgestellt wird, in der Druckluft dem Speicherbehälter zugeführt wird. In dieser Stellung des Mehrwegeventils wird der Kolben der Ventilein­heit in seine Schließstellung gedrückt und dort gehalten. Kommt es jedoch zu einem Abfall des Drucks im Druckluft­versorgungsnetz oder zu einem Ausfall der Druckluftver­sorgung, so wird die Ausblasöffnung nicht mehr oder nicht ausreichend vom Kolben verschlossen. Beim Abschießen des Luftstoßgerätes kann dann die Luft infolge Rückstoß über die Ausblasöffnung in das Geräteinnere gelangen, was mit einer erheblichen Gefährdung des Gerätes verbunden ist. Muß das Luftstoßgerät von der Druckluftversorgung demontiert werden, etwa wegen allfälliger Wartungsarbeiten oder wegen Umsetzarbeiten des Luftstoßgerätes selber, so ist es aus Sicherheitsgründen erforderlich, das Luft­stoßgerät noch einmal abzuschießen, wobei jedoch nach dem Abschießvorgang aufgrund des Absperrens der Druckluft­zufuhr kein Druck mehr auf den Kolben wirkt, so daß dieser nicht in seine Schließstellung gestellt wird.Since, depending on the strength of the material build-up, the air blown suddenly by the air blast device onto the bulk material is more or less returned as a result of the recoil effect and can get into the interior of the storage container via the blowout opening, it is necessary to blow the air out through the closing piston at lightning speed after the air has been ejected of the device to prevent destruction within the air blast device. In known devices, this is achieved in that the multi-way valve is switched in a flash from the venting position to the switching position after firing, in which compressed air is supplied to the storage container. In this position of the multi-way valve, the piston of the valve unit is pressed into its closed position and held there. However, if there is a drop in pressure in the compressed air supply network or a failure of the compressed air supply, the outlet opening will no longer or not sufficiently sealed by the piston. When the air blast device is fired, the air can then enter the interior of the device as a result of recoil, which is associated with a considerable risk to the device. If the air blast device has to be removed from the compressed air supply, e.g. due to any maintenance work or due to repositioning of the air blast device itself, it is necessary for safety reasons to fire the air blast device again, but after the firing process, due to the shutoff of the compressed air supply, no pressure acts on the piston , so that it is not placed in its closed position.

Aufgabe der Erfindung ist es, ein Luftstoßgerät derart weiterzubilden, daß selbst bei Störungen in der Druckluftversorgung eine sichere Rückstellung des Kol­bens des Luftstoßgeräts in seine Schließstellung ge­währleistet ist.The object of the invention is to develop an air blast device such that a safe return of the piston of the air blast device into its closed position is ensured even in the event of faults in the compressed air supply.

Diese Aufgabe wird erfindungsgemäß durch die im kennzeich­nenden Teil des Patentanspruches 1 enthaltenen Merkmale gelöst. Zweckmäßige Weiterbildungen der Erfindung sind durch die in den Unteransprüchen enthaltenen Merkmale ge­kennzeichnet.This object is achieved by the features contained in the characterizing part of claim 1. Advantageous developments of the invention are characterized by the features contained in the subclaims.

Nach Maßgabe der Erfindung sind ein Druckluftspeicher und ein Rückschlagventil vor dem Mehrwegeventil angeordnet, wobei das Rückschlagventil die Druckluft in Richtung auf den Speicherbehälter durchläßt, jedoch eine Druckluft­rückströmung in der anderen Richtung sperrt. Dadurch wird innerhalb des Druckluftspeichers ein Überschuß an Druckluft bereit gehalten, so daß selbst dann, wenn Störungen in der Druckluftversorgung auftreten oder die Druckluft­versorgung ganz ausfällt, der Kolben der Ventileinheit des Luftstoßgerätes nach dem Abschießen mit Druckluft be­ aufschlagt und damit sicher und schnell in seine Schließ­stellung zurückgestellt wird, in der durch den Kolben die Ausblasöffnung des Luftstoßgerätes verschlossen ist. Dadurch ist nach dem Abschießen ein Rückstoß der Luft in das Innere des Luftstoßgerätes verhindert.According to the invention, a compressed air reservoir and a non-return valve are arranged in front of the multi-way valve, the non-return valve permitting the compressed air in the direction of the storage container, but blocking a compressed air backflow in the other direction. As a result, an excess of compressed air is kept ready within the compressed air reservoir, so that even if faults occur in the compressed air supply or the compressed air supply fails completely, the piston of the valve unit of the air blast device after being fired with compressed air opens and is thus safely and quickly returned to its closed position, in which the blow-out opening of the air blast device is closed by the piston. This prevents recoil of the air into the interior of the air blast device after firing.

Die Größe des Druckluftspeichers wird hierbei so bemessen, daß abhängig von der beaufschlagten Kolbenfläche eine Ausreichende Schließkraft vorhanden ist. In einer zweckmäßigen Ausführungsform der Erfindung be­trägt das Volumen des als Speichertopf ausgebildeten Druckluftspeichers etwa 0,3 Liter, wodurch eine Schließ­kraft von etwa 40 kp auf den Kolben ausgeübt wird. Fer­ner wird infolge dieser Kolbenrückstellung über einen Speichertopf ein zuverlässiges Schließen eines Kolbens auch bei Schwankungen in der Druckluftversorgung sicher­gestellt.The size of the compressed air reservoir is dimensioned in such a way that a sufficient closing force is available depending on the piston surface acted upon. In an expedient embodiment of the invention, the volume of the compressed air reservoir designed as a storage pot is approximately 0.3 liters, as a result of which a closing force of approximately 40 kg is exerted on the piston. Furthermore, as a result of this piston reset, a piston ensures reliable closing of a piston even in the event of fluctuations in the compressed air supply.

Eine baulich kompakte Ausführungsform zeichnet sich da­durch aus, daß der Speichertopf in den Speicherbehälter integriert ist. Dazu kann der Speichertopf in eine ent­sprechende Öffnung des Mantels des Speicherbehälters eingesetzt sein, wobei die Befestigung des Speichertopfes in geeigneter Weise erfolgen kann, insbesondere durch eine dichte Schraub- oder Schweißverbindung.A structurally compact embodiment is characterized in that the storage pot is integrated in the storage container. For this purpose, the storage pot can be inserted into a corresponding opening in the jacket of the storage container, and the storage pot can be fastened in a suitable manner, in particular by means of a tight screw or welded connection.

Nachfolgend werden bevorzugte Ausführungsbeispiele der Erfindung anhand der Zeichnung beschrieben. Darin zeigen

  • Fig. 1 eine schematische Schnittansicht durch ein Luftstoßgerät sowie
  • Fig. 2 eine Einzelheit einer Abwandlung der Anordnung eines Speichertopfes an einem Speicherbehälter.
Preferred exemplary embodiments of the invention are described below with reference to the drawing. Show in it
  • Fig. 1 is a schematic sectional view through an air blast device as well
  • Fig. 2 shows a detail of a modification of the arrangement of a storage pot on a storage container.

Fig. 1 zeigt in schematischer Darstellung einen Speicher­behälter 1, der über eine Druckluftzuführleitung 2 mit Druckluft von einer nicht dargestellten externen Druck­luftquelle gespeist wird. In der Druckluftzuführleitung 2 ist ein mit 3 bezeichnetes Mehrwegeventil angeordnet, welches in der mit A-R bezeichneten Schaltstellung die Druckluftzufuhr über die Leitung 2 in den Speicherbe­hälter 1 sicherstellt und in der mit A-P bezeichneten Schaltstellung die Verbindung zur externen Druckluft­quelle sperrt und die Druckluftfzuführleitung 2 und da­mit dem Speicherbehälter 1 entlüftet.Fig. 1 shows a schematic representation of a storage container 1, which is fed via a compressed air supply line 2 with compressed air from an external compressed air source, not shown. In the compressed air supply line 2 a 3-way valve is arranged, which ensures the compressed air supply via line 2 in the storage tank 1 in the switching position designated AR and in the switching position designated AP blocks the connection to the external compressed air source and the compressed air supply line 2 and thus the Storage tank 1 vented.

Von einem Anschluß 4 am oberen Ende des Speicherbehälters 1 reicht in das Innere des Speicherbehälters ein mit 5 be­zeichnetes Verbindungsrohr, welches sich bis zu einer Führungsbuchse 6 erstreckt, in welcher ein Kolben 7 ver­schieblich geführt ist. Der Raum VR oberhalb des Kolbens 7 steht über ein nicht dargestelltes Überdruckventil, insbe­sondere ein Überdruckmembranventil mit dem Inneren des Speicherbehälters 1 in Verbindung. In der in Fig. 1 darge­stellten Stellung verschließt der Kolben 7 infolge Auf­lage an einem Ventilsitz 8 die Ausblasöffnung 9 des Luftstoßgerätes.From a connection 4 at the upper end of the storage container 1 extends into the interior of the storage container with a connecting tube designated 5, which extends to a guide bush 6, in which a piston 7 is slidably guided. The space VR above the piston 7 is connected to the interior of the storage container 1 via a pressure relief valve, not shown, in particular a pressure membrane valve. In the position shown in FIG. 1, the piston 7 closes the outlet opening 9 of the air blast device as a result of resting on a valve seat 8.

Die Funktionsweise des Luftstoßgerätes ist die folgende. Nach entsprechender Füllung des Speicherbehälters 1 über die Druckluftzufuhrleitung (Ventilstellung AR) erfolgt das Abschießen des Luftstoßgerätes dadurch, daß das Mehr­wegeventil 3 auf Entlüftungsstellung (Stellung A-P des Ventiles) umgeschaltet wird. Dies hat eine Entlüftung der oberen Kammer VR der mit 10 bezeichneten Ventilein­heit zur Folge. Da über eine an der Führungsbuchse 6 ausgebildete Öffnung 11 der Druck innerhalb des Spei­cherbehälters 11 auf den Kolben 7 wirkt und zwar insbe­ sondere auf dessen freiliegende, kreisringförmige untere Stirnfläche, wird der Kolben 7 blitzschnell nach oben bewegt, so daß schlagartig die Ausblasöffnung 9 freige­geben wird und die im Speicherbehälter 1 komprimierte Druckluft schlagartig in Richtung Ausblasstelle expan­diert.The operation of the air blast device is as follows. After the storage tank 1 has been filled appropriately via the compressed air supply line (valve position AR), the air blast device is fired by switching the multi-way valve 3 to the venting position (position AP of the valve). This results in a venting of the upper chamber VR of the valve unit denoted by 10. Since the pressure inside the storage container 11 acts on the piston 7 via an opening 11 formed on the guide bush 6, in particular special on its exposed, annular lower end face, the piston 7 is moved up in a flash, so that the blow-out opening 9 is suddenly released and the compressed air in the storage container 1 suddenly expands in the direction of the blow-out point.

Durch Umschalten des Mehrwegeventiles 3 in die Stellung A-R erfolgt die Druckluftzufuhr und wird der Kolben 7 auf den Ventilsitz 8 gedrückt, so daß der Speicherbe­hälter 8 über das Überdruck-Membranventil in der Führungs­buchse 6 bzw. der Ventileinheit 10 wieder gefüllt wird und somit für einen weiteren Abschießvorgang bereit steht.By switching the multi-way valve 3 to the AR position, the compressed air supply takes place and the piston 7 is pressed onto the valve seat 8, so that the storage container 8 is filled again via the pressure membrane valve in the guide bushing 6 or the valve unit 10 and thus for another Firing process is ready.

Entsprechend der Darstellung in Fig. 1 ist vor dem Mehr­wegeventil 3 ein Druckluftspeicher angeordnet, der im dargestellten Ausführungsbeispiel durch einen zylinder­förmigen Speichertopf 12 gebildet ist. In Richtung der Druckluftzufuhr zum Speicherbehälter 1 ist vor dem Speichertopf 12 ein Sperrventil angeordnet, welches ver­hindert, daß Druckluft nach rückwärts wieder in Rich­tung der Druckluftquelle strömen kann. Im dargestellten Ausführungsbeispiel ist dieses Sperrventil durch ein mit 13 bezeichnetes Rückschlagventil gebildet, welches die Druckluftzufuhr zum Speicherbehälter 1 ungehindert zu­läßt, jedoch entgegen der Richtung der Druckluftzufuhr sperrt, wie symbolisch aus der Zeichnung des Ventils 13 entnommen werden kann.According to the illustration in FIG. 1, a compressed air reservoir is arranged in front of the multi-way valve 3, which in the exemplary embodiment shown is formed by a cylindrical reservoir pot 12. In the direction of the compressed air supply to the storage container 1, a check valve is arranged in front of the storage pot 12, which prevents compressed air from flowing backwards again in the direction of the compressed air source. In the illustrated embodiment, this check valve is formed by a check valve designated 13, which allows the compressed air supply to the storage container 1 unhindered, but blocks against the direction of the compressed air supply, as can be seen symbolically from the drawing of the valve 13.

Durch diesen Druckluftspeicher 12 wird gewährleistet, daß in jedem Betriebszustand eine gewisse Druckluftmenge vor dem Mehrwegeventil 3 bereitgestellt ist. Sollte es somit zu einem Ausfall am Druckluftnetz kommen bzw. das Luftstoßgerät vom Druckluftnetz abgeschaltet werden und dann ein Abschießvorgang des Luftstoßgerätes erfolgen, so ist stets gewährleistet, daß infolge der im Druckluft­speicher 12 gespeicherten Druckluft der Kolben 7 wieder in seine Schließstellung nach unten auf den Ventilsitz 8 gedrückt und damit in seine Schließstellung rückgestellt wird. Dadurch wird auch ein Rückstoß der in einen Bunker abgeschossenen Luft in Richtung des Inneren des Luft­stoßgerätes infolge des auf dem Ventilsitz 8 fest aufsitzenden Kolbens 7 verhindert.This compressed air reservoir 12 ensures that a certain amount of compressed air is provided in front of the multi-way valve 3 in every operating state. If there is a failure in the compressed air network or the air blast device is switched off from the compressed air network and then the air blast device is fired, then it is always ensured that, as a result of the compressed air stored in the compressed air reservoir 12, the piston 7 is pressed back down into its closed position onto the valve seat 8 and is thus reset into its closed position. This also prevents recoil of the air shot into a bunker in the direction of the interior of the air blast device due to the piston 7 firmly seated on the valve seat 8.

Das Volumen des Speichers ist in der erforderlichen Schließ­kraft angepaßt. Nach einer zweckmäßigen Ausbildung beträgt das Volumen des Speichertopfes 12 etwa 0,3 Liter, wodurch auf dem Kolben eine Rückstellkraft in Höhe von 40 kp ausge­übt wird, die als Schließkraft völlig ausreicht. Der Speichertopf 12 und das Rückschlagventil 3 sind über Schraubanschlüsse, die in Fig. 1 mit 15 bezeichnet sind, an die Leitung 2 anschließbar. Dadurch ist ein einfaches Nachrüsten vorhandener Luftstoßgeräte mit dieser Einheit ohne weiteres möglich.The volume of the accumulator is adapted to the required closing force. According to an expedient design, the volume of the storage pot 12 is approximately 0.3 liters, as a result of which a restoring force of 40 kp is exerted on the piston, which is sufficient as the closing force. The storage pot 12 and the check valve 3 can be connected to the line 2 via screw connections, which are denoted by 15 in FIG. 1. This makes it easy to retrofit existing air blast devices with this unit.

Fig. 2 zeigt eine Ausführungsform, bei der der Speicher­topf 12 unmittelbar in den Speicherbehälter 1 integriert ist. Entsprechend der Darstellung ist der Topf 12 zum größten Teil in den Speicherbehälter 1 eingelassen und über eine dichte Schraub- oder Schweißverbindung 16 mit dem Speicherbehälter 1 fest verbunden.FIG. 2 shows an embodiment in which the storage pot 12 is integrated directly into the storage container 1. According to the illustration, the pot 12 is for the most part embedded in the storage container 1 and firmly connected to the storage container 1 via a tight screw or welded connection 16.

Claims (7)

1. Luftstoßgerät zum Beseitigen von Materialaufstauungen von Schüttgütern in Bunkern u. dgl., mit einer Leitung zur Zuführung von Druckluft zu einem Speicherbehälter, einem Mehrwegeventil mit einer Schaltstellung für die Druckluftzufuhr zum Speicherbehälter und einer Ent­lüftungsstellung, und mit einem über die Druckluftzu­führleitung beaufschlagbaren Kolben, der in einer inner­halb des Speicherbehälters angeordneten Buchse einer Ventileinheit geführt ist und in seiner untersten Stel­lung die Ausblasöffnung des Luftstoßgerätes schließt,
dadurch gekennzeichnet,
daß in der Druckluftzuführleitung (2) vor dem Mehrwege­ventil (3) ein Druckluftspeicher (12) vorgesehen ist, vor dem in Richtung Druckluftzufuhr ein Rückschlag­ ventil (13) angeordnet ist, welches entgegen der Rich­tung der Druckluftzufuhr sperrt.1. Air blast device for removing material build-up of bulk goods in bunkers and. Like., With a line for supplying compressed air to a storage container, a multi-way valve with a switch position for the compressed air supply to the storage container and a venting position, and with a piston which can be acted upon via the compressed air supply line and which is guided in a socket of a valve unit arranged within the storage container and closes the blow-out opening of the air blower in its lowest position,
characterized by
that in the compressed air supply line (2) in front of the multi-way valve (3) a compressed air reservoir (12) is provided, before which there is a setback in the direction of the compressed air supply valve (13) is arranged, which blocks against the direction of the compressed air supply. 2. Gerät nach Anspruch 1,
dadurch gekennzeichnet,
daß der Druckluftspeicher (12) durch einen topf­artigen Behälter gebildet ist.2. Device according to claim 1,
characterized by
that the compressed air reservoir (12) is formed by a pot-like container. 3. Gerät nach Anspruch 2,
dadurch gekennzeichnet,
daß der Behälter zylindrisch ist.3. Device according to claim 2,
characterized by
that the container is cylindrical. 4. Gerät nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Druckluftspeicher (12) ein Volumen von etwa 0,3 Liter aufweist.4. Device according to one of the preceding claims,
characterized by
that the compressed air reservoir (12) has a volume of about 0.3 liters. 5. Gerät nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Druckluftspeicher (12) und das Rückschlag­ventil (13) Schraubanschlüsse für den Anschluß an die Druckluftzuführleitung (2) aufweisen.5. Device according to one of the preceding claims,
characterized by
that the compressed air reservoir (12) and the check valve (13) have screw connections for connection to the compressed air supply line (2). 6. Gerät nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Speichertopf (12) in den Mantel des Speicherbehälters (1) integriert, insbesondere mindestens teilweise eingelassen angeordnet ist.6. Device according to one of the preceding claims,
characterized by
that the storage pot (12) is integrated in the jacket of the storage container (1), in particular is arranged at least partially embedded. 7. Gerät nach Anspruch 6,
dadurch gekennzeichnet,
daß der Speichertopf (12) mit dem Speicherbehälter (1) verschraubt oder verschweißt ist.7. Device according to claim 6,
characterized by
that the storage pot (12) is screwed or welded to the storage container (1).
EP88120822A 1987-12-15 1988-12-13 Quick-release aerator Expired - Lifetime EP0320884B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88120822T ATE77339T1 (en) 1987-12-15 1988-12-13 AIR PUSH DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3742489 1987-12-15
DE3742489A DE3742489C2 (en) 1987-12-15 1987-12-15 Air blast device

Publications (2)

Publication Number Publication Date
EP0320884A1 true EP0320884A1 (en) 1989-06-21
EP0320884B1 EP0320884B1 (en) 1992-06-17

Family

ID=6342659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88120822A Expired - Lifetime EP0320884B1 (en) 1987-12-15 1988-12-13 Quick-release aerator

Country Status (4)

Country Link
EP (1) EP0320884B1 (en)
AT (1) ATE77339T1 (en)
DE (2) DE3742489C2 (en)
GR (1) GR3004994T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19743789A1 (en) * 1997-10-02 1999-04-08 Agrichema Materialflusstechnik Pressurized air blower with pressurized air-container and outlet
CN103693319A (en) * 2013-12-20 2014-04-02 苏州钻石金属粉有限公司 Stearic acid discharging valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006016627U1 (en) * 2006-10-30 2006-12-21 Agrilux Beteiligungs Gmbh System for releasing blockages in silos comprises two pressure tanks with valves supplying blasts of air to outlet pipes, tanks being connected to pressurized air lines and having recirculating pipes with valves connecting them to these

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788527A (en) * 1973-01-22 1974-01-29 Martin Eng Co Quick-release aerator for introducing high pressure air into a container to facilitate dispensing
EP0097236A1 (en) * 1982-06-23 1984-01-04 VSR Engineering GmbH Fördertechnik Blowing device for removing banks in silos for bulk material
US4469247A (en) * 1982-03-03 1984-09-04 Global Manufacturing Inc. Blast aerator

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Publication number Priority date Publication date Assignee Title
DE653921C (en) * 1933-06-16 1937-12-06 Elektrowerke Akt Ges Method and device for the removal of bridges and steep walls in bunkers or silos for bulk goods
DE1254983B (en) * 1962-01-31 1967-11-23 Frank Hanselmann Windshield washer for motor vehicles or the like.
EP0248265A3 (en) * 1986-05-20 1988-08-03 AGRICHEMA Materialflusstechnik GmbH Quick release aerator for preventing bridge formations in bulk containers
DE3616990C1 (en) * 1986-05-21 1987-12-17 Agrichema Materialflusstechnik Air blast device for resolving material build-up in storage silos for bulk material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788527A (en) * 1973-01-22 1974-01-29 Martin Eng Co Quick-release aerator for introducing high pressure air into a container to facilitate dispensing
US4469247A (en) * 1982-03-03 1984-09-04 Global Manufacturing Inc. Blast aerator
EP0097236A1 (en) * 1982-06-23 1984-01-04 VSR Engineering GmbH Fördertechnik Blowing device for removing banks in silos for bulk material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19743789A1 (en) * 1997-10-02 1999-04-08 Agrichema Materialflusstechnik Pressurized air blower with pressurized air-container and outlet
DE19743789B4 (en) * 1997-10-02 2005-10-06 Agrichema Materialflusstechnik Gmbh & Co. Kg Apparatus for the abrupt blowing out of compressed air for removing material caking of bulk materials in reaction vessels
CN103693319A (en) * 2013-12-20 2014-04-02 苏州钻石金属粉有限公司 Stearic acid discharging valve
CN103693319B (en) * 2013-12-20 2016-03-02 苏州钻石金属粉有限公司 Stearic acid baiting valve

Also Published As

Publication number Publication date
DE3742489C2 (en) 1998-04-09
DE3742489A1 (en) 1989-07-06
DE3872195D1 (en) 1992-07-23
ATE77339T1 (en) 1992-07-15
GR3004994T3 (en) 1993-04-28
EP0320884B1 (en) 1992-06-17

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