EP0246617B1 - Quick release aerator for preventing bridge formations in bulk containers - Google Patents

Quick release aerator for preventing bridge formations in bulk containers Download PDF

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Publication number
EP0246617B1
EP0246617B1 EP87107276A EP87107276A EP0246617B1 EP 0246617 B1 EP0246617 B1 EP 0246617B1 EP 87107276 A EP87107276 A EP 87107276A EP 87107276 A EP87107276 A EP 87107276A EP 0246617 B1 EP0246617 B1 EP 0246617B1
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EP
European Patent Office
Prior art keywords
compressed air
container
quick release
valve
overflow valve
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.)
Expired
Application number
EP87107276A
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German (de)
French (fr)
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EP0246617A2 (en
EP0246617A3 (en
Inventor
Udo Leibling
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Agrichema Materialflusstechnik GmbH
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Agrichema Materialflusstechnik GmbH
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Priority to AT87107276T priority Critical patent/ATE47114T1/en
Publication of EP0246617A2 publication Critical patent/EP0246617A2/en
Publication of EP0246617A3 publication Critical patent/EP0246617A3/en
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Publication of EP0246617B1 publication Critical patent/EP0246617B1/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 generate strong air blasts in order to remove material build-up and material compression in storage silos for bulk goods and thus to solve flow problems.
  • Conventional air blast devices (DE-OS 32 23 406) contain a pressure vessel and a discharge nozzle immersed in the latter, the outlet opening of which can be closed against the interior of the inner vessel by a valve closing body.
  • the valve closing body itself is guided in a tube between an open and a closed position.
  • In this pipe opens a line that connects the pressure vessel with an external pressure accumulator.
  • a multi-way valve usually a three-way, two-way valve, is arranged in this line in front of the pressure vessel. This ensures the flow of compressed air between the accumulator to the pressure vessel in one position and provides ventilation in the other position in order to cause the piston to snap back away from the outlet opening of the outlet port, so that the accumulated in the pressure vessel through the then open outlet port Compressed air can escape suddenly.
  • the piston is preloaded by a compression spring accommodated in the tube, so that it rests under spring force at the outlet opening of the outlet connection.
  • a compression spring accommodated in the tube, so that it rests under spring force at the outlet opening of the outlet connection.
  • Such a construction is particularly disadvantageous when a reliable mode of operation of the air blast device is desired over a larger operating range, for example for a pressure range from 4 to 10 bar.
  • air blast devices are often used in large numbers side by side on one and the same storage silo and are fired one after the other at short time intervals (fast cycle times). With a correspondingly high number of air blast devices in accordance with the size of the clock sequence, this can lead to an excessive load on the central external memory, so that there is a pressure drop in the last devices in the clock sequence due to the overloading of the memory.
  • the pressure vessel would not be brought up to the full operating pressure, so that when the air blast device was fired no perfect operation would be guaranteed.
  • the piston when compressed air flows into the pressure vessel, if the pressure in the external pressure accumulator drops due to operation, the piston would not be pressed sufficiently against its closing seat on the outlet port.
  • the operation of an air blast device with low operating pressure carries the risk that if the air blast presses against a very hard material build-up in the storage silo, the air can blow back into the device. With a device with a piston return spring, this cannot be prevented at high pressures.
  • the compression spring as a mechanical wear part is placed unfavorably, namely within the air blast device, so that any replacement of a worn spring leads to a corresponding maintenance effort, the air blast device not being able to be used during the maintenance period.
  • the object of the invention is to ensure a flawless and reliable mode of operation of an air blast device even over a wide pressure range.
  • a branch line leads from the connection line leading to the pressure accumulator to the pressure vessel, in which an overflow valve is arranged, the interior of the pressure vessel can only be filled when the pressure in the connecting line exceeds the blocking value specified by the overflow valve.
  • a blow back of the air blast into the device when the air blast hits very hard material build-up is thus excluded, as well as a escape of compressed air from the pressure container before the container is filled. This is particularly advantageous if several air blast devices are actuated in quick succession, ie with a high cycle sequence.
  • the invention ensures that, regardless of the number of air blast devices, all pistons are always at least at an operating pressure of e.g. 4 bar and thus an optimal closing pressure is generated due to the different surfaces on the top and bottom of the piston.
  • the operating compressed air network has an operating pressure of more than e.g. 4 bar, the compressed air tanks can be filled at the same time, otherwise all pistons are closed with the optimal closing pressure and the tanks only fill when the operating pressure of 4 bar is exceeded again.
  • Another advantage of the invention is that, if necessary, only the pistons are supplied with the operating pressure, while the air supply to the pressure vessel either by pneumatic or electromagnetic valves are closed or a pressure reducer is arranged in front of the overflow valve and adjusted so that the pressure required for the overflow valve to function is not exceeded.
  • the overflow valve is designed to be adjustable. This allows any pressure blocking values to be set on the overflow valve. Since the overflow valve is located outside the pressure vessel, this setting can be made quickly and easily without interruption of the operation of the air blast device.
  • the overflow valve can work as a check valve at the same time, or a check valve is expediently additionally used.
  • Another advantage is the measure that the compressed air supply line is connected to the connecting line via a T-piece, which enables simple retrofitting of existing air blast devices.
  • the connecting line, the compressed air supply line and the overflow valve are formed in a single pipe socket which can be screwed onto the pressure vessel.
  • the air blast device essentially comprises a pressure vessel 1 and a blow-out nozzle 2 which plunges into it and which, according to FIG. 1, is closed off from the interior of the pressure vessel 1 by a valve-closure member designed as a piston 3.
  • the piston 3 is guided in a tube 4, which is connected via a connecting line 5 to an external compressed air reservoir designated 6.
  • suitable means such as piston rings and the like.
  • a multi-way valve 7, here a three-way two-way valve, is arranged in front of the pressure vessel 1, which enables the flow of compressed air from the compressed air reservoir 6 to the pressure vessel 1 in one position and provides ventilation in the other position, through which the sudden return movement of the Piston and thus the generation of the air blast is triggered. Since such air blast devices are generally known, the structure and mode of operation are only briefly described above and the structure is only shown schematically in the drawings.
  • a branch line designated 8 which opens into the pressure vessel 1.
  • an overflow valve 9 is arranged, which is expediently designed to be adjustable.
  • a check valve arranged between the overflow valve 9 and the pressure vessel is not shown.
  • the multi-way valve 7 is in the flow position, so that compressed air flows from the reservoir 6 via the connecting line 5 directly to the pipe 4, as indicated by the arrow in Fig. 1, and thereby the piston 3 against Immersion end of the outlet 2 is pressed.
  • the overflow valve 9 is set to a pressure value of 4 bar. As soon as the compressed air flowing from the reservoir 6 reaches 4 bar, the compressed air can now flow via the overflow valve 9 and the branch line 8 into the interior 10 of the pressure container 1, which thereby fills with compressed air of 4 bar.
  • the multi-way valve 7 is switched over to the venting position in the known manner.
  • the compressed air contained in the interior 10 of the pressure vessel 1 is effective on the underside of the piston, so that the latter is pressed upward toward the inflow opening of the connecting line 5.
  • the outlet 12a of the pressure vessel 1 is opened, so that the compressed air in the pressure vessel 1 can suddenly come out through the blow-out nozzle 2 in the manner of an air blast corresponding to the direction of the arrow in FIG. 2.
  • the branch line 8 is expediently connected to the connecting line 5 via a T-insert 11, which is previously inserted into the connecting line 5.
  • An overpressure diaphragm valve is particularly suitable as the overflow valve.
  • the connecting line 5, the branch line 8 and the overflow valve 9 are arranged or formed in one component, namely a pipe socket designated 12, which can be screwed onto the pressure vessel 1 via a screw thread 13.
  • the branch line 8 which leads to the pressure vessel 1.
  • the overflow valve 9 is arranged in the branch line 8.
  • the closing member of this overflow valve 9 is formed by a ball 15 which is biased by a spring 16 into its closed position according to FIG. 3.
  • the overflow valve 9 is accessible via a lateral bore 17 which can be closed by a screw cap 19.
  • a further line 20 is formed in the pipe socket 12, but does not open into the connecting line 5.
  • This additional line 20 can be used as a further connection line, for example to indicate the internal pressure of the container on a manometer screwed onto the connection line 20.
  • the embodiment according to FIG. 4 is similar to the embodiment according to FIG. 3, as the connecting line 5, the branch line 8 and the overflow valve 9 are also accommodated in a pipe socket 12 there.
  • a further line 29 can optionally also be accommodated in the pipe socket 12 according to FIG. 4.
  • the valve closing member is disc-shaped and biased in its closed position by a spring 16.
  • the installation of the overflow valve 9 takes place via a pipe socket 21 which is attached laterally to the pipe socket 12 and can be closed by means of a screw cap (not shown).
  • the embodiment according to FIG. 3 offers the advantage over the embodiment according to FIG. 4 that it is a turned part.

Abstract

1. Quick release aerator for disintegrating material accumulations in storage silos for bulk material by means of air blasts, comprising a container (1) which is connected to a compressed air storage means (6) via a connection line (5) and adapted to be filled with compressed air from the compressed air storage means (6) through a multipath valve (7), said container (1) having an outlet connecting piece (2) and a piston-like valve locking body (3) which is adapted to be reciprocated between the opened and the closed position in a tightly sealing manner and which, when being in the closed position, closes the outlet connecting piece (2) inside the compressed air container (1) against the outside, characterised in that a compressed air supply line (8) is branched off from the connection line (5) between the multipath valve (7) and the compressed air container (1), which compressed air supply line (8) leads into the compressed air container (1) and includes an overflow valve (9).

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.

Luftstoßgerate werden zur Erzeugung starker Luftstöße benutzt, um damit Materialanbackungen und Materialverdichtungen in Lagersilos für Schüttgut zu beseitigen und damit Fließprobleme zu beheben.Air blast devices are used to generate strong air blasts in order to remove material build-up and material compression in storage silos for bulk goods and thus to solve flow problems.

Herkömmliche Luftstoßgeräte (DE-OS 32 23 406) beinhalten einen Druckbehälter und einen in diesen eintauchenden Ausblasstutzen, dessen Austrittsöffnung gegen den Innenraum des Innenbehälters durch einen Ventilschließkörper verschließbar ist. Der Ventilschließkörper selbst ist in einem Rohr zwischen einer Offen- und seiner Schließstellung geführt. In dieses Rohr mündet eine Leitung, die den Druck behälter mit einem externen Druckspeicher verbindet. In dieser Leitung ist vor dem Druckbehälter ein Mehrwegeventil, zumeist ein DreilZweiwegeventil, angeordnet. Dieses stellt in einer Stellung den Durchfluß von Druckluft zwischen dem Speicher zum Druckbehälter sicher und sorgt in der anderen Stellung für eine Entlüftung, um ein Zurückschnellen des Kolbens weg von der Austrittsöffnung des Ausblasstutzens zu erzeugen, so daß durch den dann offenen Ausblasstutzen die im Druckbehälter angesammelte Druckluft schlagartig entweichen kann. Bei dem bekannten Luftstoßgerät ist der Kolben durch eine im Rohr aufgenommene Druckfeder vorbelastet, so daß er unter Federkraft an der Austrittsöffnung des Ausblasstutzens anliegt. Eine solche Konstruktion ist insbesondere dann nachteilhaft, wenn eine zuverlässige Wirkungsweise des Luftstoßgerätes über einen größeren Betriebsbereich gewünscht wird, etwa für einen Druckbereich von 4 bis 10 bar. Zu berücksichtigen ist ferner, daß derartige Luftstoßgeräte häufig in einer größeren Anzahl nebeneinander an ein- und demselben Lagersilo verwendet werden und in zeitlich engen Abständen (schnelle Takttolgen) hintereinander abgeschossen werden. Dies kann bei einer entsprechend hohen Anzahl von Luftstoßgeräten entsprechend der Größe der Taktfolge zu einer übermäßigen Belastung des zentralen externen Speichers führen, so daß es bei den letzten Geräten in der Taktfolge zu einem Druckabfall aufgrund der Überlastung des Speichers kommt. In einem solchen Falle würde der Druckbehälter nicht auf den vollen Betriebsdruck gebracht werden, so daß beim Abschießen des Luftstoßgerätes keine einwandfreie Betriebsweise garantiert wäre. Im übrigen würde beim Einströmen von Druckluft in den Druckbehälter bei einem betriebsbedingten Absinken des Druckes im externen Druckspeicher der Kolben nicht ausreichend gegen seinen Schließsitz am Ausblasstutzen gedrückt. Der Betrieb eines Luftstoßgerätes mit geringem Betriebsdruck birgt die Gefahr in sich, daß dann, wenn der Luftstoß gegen eine sehr harte Materialanbackung im Lagersilo drückt, die Luft in das Gerät zurückschlagen kann. Bei einen Gerät mit einer Kolbenrückstellfeder kann dies bei hohen Drücken nicht verhindert werden. Ferner ist die Druckfeder als mechanisches Verschleißteil ungünstig plaziert, nämlich innerhalb des Luftstoßgerätes, so daß ein allfälliger Austausch einer verschlissenen Feder zu einem entsprechenden Wartungsaufwand führt, wobei in der Wartungsperiode das Luftstoßgerät nicht eingesetzt werden kann.Conventional air blast devices (DE-OS 32 23 406) contain a pressure vessel and a discharge nozzle immersed in the latter, the outlet opening of which can be closed against the interior of the inner vessel by a valve closing body. The valve closing body itself is guided in a tube between an open and a closed position. In this pipe opens a line that connects the pressure vessel with an external pressure accumulator. A multi-way valve, usually a three-way, two-way valve, is arranged in this line in front of the pressure vessel. This ensures the flow of compressed air between the accumulator to the pressure vessel in one position and provides ventilation in the other position in order to cause the piston to snap back away from the outlet opening of the outlet port, so that the accumulated in the pressure vessel through the then open outlet port Compressed air can escape suddenly. In the known air blast device, the piston is preloaded by a compression spring accommodated in the tube, so that it rests under spring force at the outlet opening of the outlet connection. Such a construction is particularly disadvantageous when a reliable mode of operation of the air blast device is desired over a larger operating range, for example for a pressure range from 4 to 10 bar. It should also be borne in mind that such air blast devices are often used in large numbers side by side on one and the same storage silo and are fired one after the other at short time intervals (fast cycle times). With a correspondingly high number of air blast devices in accordance with the size of the clock sequence, this can lead to an excessive load on the central external memory, so that there is a pressure drop in the last devices in the clock sequence due to the overloading of the memory. In such a case, the pressure vessel would not be brought up to the full operating pressure, so that when the air blast device was fired no perfect operation would be guaranteed. In addition, when compressed air flows into the pressure vessel, if the pressure in the external pressure accumulator drops due to operation, the piston would not be pressed sufficiently against its closing seat on the outlet port. The operation of an air blast device with low operating pressure carries the risk that if the air blast presses against a very hard material build-up in the storage silo, the air can blow back into the device. With a device with a piston return spring, this cannot be prevented at high pressures. Furthermore, the compression spring as a mechanical wear part is placed unfavorably, namely within the air blast device, so that any replacement of a worn spring leads to a corresponding maintenance effort, the air blast device not being able to be used during the maintenance period.

Aufgabe der Erfindung ist es, eine einwandfreie und zuverlässige Betriebswise eines Luftstoßgerätes auch über einen weiten Druckbereich zu gewährleisten.The object of the invention is to ensure a flawless and reliable mode of operation of an air blast device even over a wide pressure range.

Diese Aufgabe wird erfindungsgemäß durch die im kennzeichnenden Teil des Patentanspruches 1 enthaltenen Merkmale gelöst.This object is achieved by the features contained in the characterizing part of claim 1.

Da nach Maßgabe der Erfindung von der zum Druckspeicher führenden Ansachlußleitung eine Zweigleitung zum Druckbehälter führt, in welcher ein Uberströmventil angeordnet ist, kann die Füllung des Innenraumes des Druckbehälters erst dann erfolgen, wenn der Druck in der Anschlußleitung den durch das Überströmventil vorgegebenen Sperrwert überschreitet. Dadurch ist sichergestellt, daß zuvor bereits der Vorraum des Kolbens über die Anschlußleitung mit Druckluft beaufschlagt und damit der Kolben sicher in seine Schließstellung an die Austrittsöffnung des Ausblasstutzens gedrückt ist. Ein Zurückschlagen des Luftstoßes in das Gerät beim Auftreffen des Luftstoßes auf sehr harte Materialanbackungen ist damit ebenso wie ein Entweichen von Druckluft aus dem Druckbehälter vor Füllung des Behälters ausgeschlossen. Dies ist insbesondere dann von Vorteil, wenn mehrere Luftstoßgeräte in Kurzem zeitlichen Abstand hintereinander, also mit hoher Taktfolge, betatigt werden. Da das Andrücken des Kolbens in seine Schließstellung ausschließlich aufgrund einer Druckregelung erfolgt, entfallen mechanische Bauteile hierzum so daß Verschleißprobleme weitgehend beseitigt sind. Ein weiterer Vorteil der Druckregelung des Kolbens be steht in der Zuverlässigkeit dieser Regelung bei jedem Betriebsdruck, so daß mit dem erfindungsgemäßen, Luftstoßgerät ein einwandfreier und zuverlässiger Betrieb über einen großen Druckbereich von etwa 4 bar bis 10 bar gewährleistet ist. Ein weiterer Vorteil besteht in der guten Zugänglichkeit des Überstromventils, das sich außerhalb des Druckbehälters befindet. Ferner ist mit der erfindungsgemäßen Lösung eine Anpassung bereits vorhandener Luftstoßgeräte ohne weiteres möglich.Since, according to the invention, a branch line leads from the connection line leading to the pressure accumulator to the pressure vessel, in which an overflow valve is arranged, the interior of the pressure vessel can only be filled when the pressure in the connecting line exceeds the blocking value specified by the overflow valve. This ensures that the antechamber of the piston is already pressurized with compressed air via the connecting line and that the piston is thus securely pressed into its closed position at the outlet opening of the exhaust port. A blow back of the air blast into the device when the air blast hits very hard material build-up is thus excluded, as well as a escape of compressed air from the pressure container before the container is filled. This is particularly advantageous if several air blast devices are actuated in quick succession, ie with a high cycle sequence. Since the piston is pressed into its closed position solely on the basis of a pressure control, mechanical components are not required, so that wear problems are largely eliminated. Another advantage of the pressure control of the piston be in the reliability of this control at any operating pressure, so that with the air blast device according to the invention a perfect and reliable operation over a large pressure range of about 4 bar to 10 bar is guaranteed. Another advantage is the easy accessibility of the overflow valve, which is located outside the pressure vessel. Furthermore, with the solution according to the invention, adaptation of already existing air blast devices is readily possible.

Mit der Erfindung wird sichergestellt, daß unabhängig von der Anzahl der Luftstoßgeräte zuerst immer all Kolben mindestens mit einem Betriebsdruck von z.B. 4 bar baufschlagt werden und damit aufgrund der unterschiedlichen Flächen an Ober- und Unterseite des Kolbens ein optimaler Schließdruck erzeugt wird. Solange das Betriebsdruckluftnetz einen Betriebsdruck von mehr als z.B. 4 bar bringt, ist ein Befüllen der Druckluftbehälter gleichzeitig möglich, andernfalls werden zuerst alle Kolben mit dem optimalen Schließdruck geschlossen und erst, wenn der Betriebsdruck von 4 bar wieder überschritten wird, füllen sich die Behälter.The invention ensures that, regardless of the number of air blast devices, all pistons are always at least at an operating pressure of e.g. 4 bar and thus an optimal closing pressure is generated due to the different surfaces on the top and bottom of the piston. As long as the operating compressed air network has an operating pressure of more than e.g. 4 bar, the compressed air tanks can be filled at the same time, otherwise all pistons are closed with the optimal closing pressure and the tanks only fill when the operating pressure of 4 bar is exceeded again.

Ein weiterer Vorteil der Erfindung besteht darin, daß bei Bedarf nur die Kolben mit dem Betriebsdruck versorgt werden, während die Luftzuführung in den Druckbehälter entweder durch pneumatische oder elektromagnetische Ventile geschlossen wird bzw. vor dem Überströmventil ein Druckminderer angeordnet und so eingestellt wird, daß der für die Funktion des Überströmventils erforderliche Mindestdruck unterschritten wird.Another advantage of the invention is that, if necessary, only the pistons are supplied with the operating pressure, while the air supply to the pressure vessel either by pneumatic or electromagnetic valves are closed or a pressure reducer is arranged in front of the overflow valve and adjusted so that the pressure required for the overflow valve to function is not exceeded.

Während nach dem bisherigen Stand der Technik nur ein Teil des Querschnittes der Druckluftzuführleitung zum Füllen des Behälters genutzt werden konnte, damit der Kolben mit dem nötigen Mehrdruck nach unten gedrückt und verschlossen wurde, ist es durch die Erfindung nunmehr möglich, über den gesamten Querschnitt der Druckluftleitung den Druckbehälter zu füllen. Dadurch wird die Füllzeit des Druckbehälters wesentlich reduziert und das Luftstoßgerät steht schneller schußbereit zur Verfügung.While according to the prior art, only a part of the cross section of the compressed air supply line could be used to fill the container so that the piston was pressed down and closed with the necessary additional pressure, the invention now makes it possible to cover the entire cross section of the compressed air line to fill the pressure vessel. This significantly reduces the filling time of the pressure container and the air blast device is ready to fire faster.

Nach einer zweckmäßigen Weiterbildung der Erfindung ist das Überströmventil einstellbar ausgebildet. Dadurch lassen sich beliebige Drucksperrwerte am Überströmventil einstellen. Da sich das Überströmventil außerhalb des Druckbehälters befindet, kann diese Einstellung schnell und problemlos vorgenommen werden, ohne daß es zur Unterbrechung des Betriebs des Luftstoßgerätes kommt. Das Überströmventil kann gleichzeitig als Rückschlagventil arbeiten oder es wird zweckmäßigerweise zusätzlich ein Rückschlagventil verwendet.According to an expedient development of the invention, the overflow valve is designed to be adjustable. This allows any pressure blocking values to be set on the overflow valve. Since the overflow valve is located outside the pressure vessel, this setting can be made quickly and easily without interruption of the operation of the air blast device. The overflow valve can work as a check valve at the same time, or a check valve is expediently additionally used.

Vorteilhaft ist ferner die Maßnahme, daß die Druckluftzuführleitung über ein T-Stück an die Anschlußleitung angeschlossen ist, was eine einfache Umrüstung bereits vorhandener Luftstoßgeräte ermöglicht.Another advantage is the measure that the compressed air supply line is connected to the connecting line via a T-piece, which enables simple retrofitting of existing air blast devices.

Nach einer zweckmäßigen Weiterbildung der Erfindung sind die Anschlußleitung, die Druckluftzuführleitung sowie das Überströmventil in einem einzigen Rohrstutzen ausgebildet, der auf den Druckbehälter aufschraubbar ist. Diese Maßnahme bietet den Vorteil einer kompakten Lösung, die eine einfache Montage- und Demontagearbeit erlaubt.According to an expedient development of the invention, the connecting line, the compressed air supply line and the overflow valve are formed in a single pipe socket which can be screwed onto the pressure vessel. This measure offers the advantage of a compact solution that allows simple assembly and disassembly work.

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

  • Fig. 1 eine schematische Darstellung eines Luftstoßgerätes in einer Betriebsstellung,
  • Fig. 2 das in Fig. 1 dargestellte Luftstoßgerät in einer Weiteren Betriebsstellung.
  • Fig. 3 eine weitere Ausführungsform einer Ventilan ordnung nach der Erfindung sowie
  • Fig. 4 eine weitere alternative Ausführungsform der Erfindung, gleichfalls im Schnitt entsprechend Fig. 3.
Exemplary embodiments of the invention are described below with reference to the drawing. Show in it
  • 1 is a schematic representation of an air blast device in an operating position,
  • Fig. 2 shows the air blast device shown in Fig. 1 in a further operating position.
  • Fig. 3 shows another embodiment of a Ventilan arrangement according to the invention as well
  • 4 shows a further alternative embodiment of the invention, likewise in section corresponding to FIG. 3.

Entsprechend den Figuren umfaßt das Luftstoßgerät im wesentlichen einen Druckbehälter 1 und einen in diesen eintauchenden Ausblasstutzen 2, der gemäß Fig. 1 im Inneren des Druckbehälters 1 durch einen als Kolben 3 ausgebildeten Ventilschließkörper gegen den Innenraum des Druckbehälters 1 hin abgeschlossen ist. Der Kolben 3 ist in einem Rohr 4 geführt, welches über eine Anschlußleitung 5 an einen mit 6 bezeichneten externen Druckluftspeicher angeschlossen ist. Es versteht sich von selbst, daß der im Rohr 4 infolge von Druckluftbeaufschlagung zwischen seiner Offen- und Schließstellung hin- und herbewegbare Kolben 3 gegenüber dem Rohr 4 hin durch geeignete Mittel, wie etwa Kolbenringe u. dgl. abgedichtet ist. In der Anschlußleitung 5 ist vor dem Druckbehälter 1 ein Mehrwegeventil 7, hier ein DreilZweiwegeventil, angeordnet, welches in einer Stellung den Durchfluß der Druckluft vom Druckluftspeicher 6 zum Druckbehälter 1 ermöglicht und in der anderen Stellung für die Entlüftung sorgt, durch welche die schlagartige Zurückbewegung des Kolbens und damit die Erzeugung des Luftstoßes ausgelöst wird. Da deratige Luftstoßgeräte generell bekannt sind, ist Aufbau und Wirkungsweise vorstehend nur kurz beschrieben und in den Zeichnungen der Aufbau nur rein schematisch dargestellt.According to the figures, the air blast device essentially comprises a pressure vessel 1 and a blow-out nozzle 2 which plunges into it and which, according to FIG. 1, is closed off from the interior of the pressure vessel 1 by a valve-closure member designed as a piston 3. The piston 3 is guided in a tube 4, which is connected via a connecting line 5 to an external compressed air reservoir designated 6. It goes without saying that the piston 3, which can be moved back and forth in the tube 4 as a result of compressed air between its open and closed positions, relative to the tube 4, by suitable means, such as piston rings and the like. Like. Is sealed. In the connecting line 5, a multi-way valve 7, here a three-way two-way valve, is arranged in front of the pressure vessel 1, which enables the flow of compressed air from the compressed air reservoir 6 to the pressure vessel 1 in one position and provides ventilation in the other position, through which the sudden return movement of the Piston and thus the generation of the air blast is triggered. Since such air blast devices are generally known, the structure and mode of operation are only briefly described above and the structure is only shown schematically in the drawings.

Zwischen dem Mehrwegeventil 7 und dem Druckbehälter 1 zweigt von der Anschlußleitung 5 eine mit 8 bezeichnete Zweigleitung ab, die in den Druckbehälter 1 mündet. In dieser Zweigleitung 8 ist ein Überströmventil 9 angeordnet, welches zweckmäßigerweise einstellbar ausgebildet ist. Der Einfachheit halber ist ein zwischen dem Überströmventil 9 und dem Druckbehäl ter angeordnetes Rückschlagventil nicht dargestellt.Between the multi-way valve 7 and the pressure vessel 1 branches off from the connecting line 5, a branch line designated 8, which opens into the pressure vessel 1. In this branch line 8, an overflow valve 9 is arranged, which is expediently designed to be adjustable. For the sake of simplicity, a check valve arranged between the overflow valve 9 and the pressure vessel is not shown.

Im Falle von Fig. 1 befindet sich das Mehrwegeventil 7 in der Durchflußstellung, so daß aus dem Speicher 6 Druckluft über die Anschlußleitung 5 unmittelbar zum Rohr 4 strömt, wie durch den Pfeil in Fig. 1 gekennzeichnet ist, und dadurch der Kolben 3 gegen das Eintauchende des Ausblasstutzens 2 gedrückt wird. Im zu beschreibenden Fall wird davon ausgegangen, daß das Überströmventil 9 auf einen Druckwert von 4 bar eingestellt ist. Sobald die vom Speicher 6 herströmende Druckluft 4 bar erreicht, kann die Druckluft nunmehr über das Überströmventil 9 und die Zweigleitung 8 in den Innenraum 10 des Druckbehälters 1 strömen, der sich dadurch mit Druckluft von 4 bar füllt.In the case of Fig. 1, the multi-way valve 7 is in the flow position, so that compressed air flows from the reservoir 6 via the connecting line 5 directly to the pipe 4, as indicated by the arrow in Fig. 1, and thereby the piston 3 against Immersion end of the outlet 2 is pressed. In the case to be described, it is assumed that the overflow valve 9 is set to a pressure value of 4 bar. As soon as the compressed air flowing from the reservoir 6 reaches 4 bar, the compressed air can now flow via the overflow valve 9 and the branch line 8 into the interior 10 of the pressure container 1, which thereby fills with compressed air of 4 bar.

Soll abgeschossen werden, so wird in der bekannten Weise das Mehrwegeventil 7 in die Entlüftungsstellung umgeschaltet. Dadurch wird die im Innenraum 10 des Druckbehälters 1 enthaltene Druckluft auf die Kolbenunterseite wirksam, so daß dieser nach oben hin zur Einströmöffnung der Anschlußleitung 5 gedrückt wird. Dadurch wird der Austritt 12a des Druckbehälters 1 geöffnet, so daß die im Druckbehälter 1 befindliche Druckluft schlagartig in Art eines Luftstoßes entsprechend der Pfeilrichtung in Fig. 2 durch den Ausblastutzen 2 nach außen hinaustreten kann.If it is to be fired, the multi-way valve 7 is switched over to the venting position in the known manner. As a result, the compressed air contained in the interior 10 of the pressure vessel 1 is effective on the underside of the piston, so that the latter is pressed upward toward the inflow opening of the connecting line 5. As a result, the outlet 12a of the pressure vessel 1 is opened, so that the compressed air in the pressure vessel 1 can suddenly come out through the blow-out nozzle 2 in the manner of an air blast corresponding to the direction of the arrow in FIG. 2.

Zur Erleichterung der Nachrüstung bereits vorhandener Geräte ist zweckmäßigerweise die Abzweigleitung 8 über ein T-Einsatzstück 11 an die Anschlußleitung 5 angeschlossen, welches zuvor in die Anschlußleitung 5 eingefügt wird. Als Überströmventil eignet sich insbesondere ein Überdruck-Membranventil.In order to facilitate the retrofitting of existing devices, the branch line 8 is expediently connected to the connecting line 5 via a T-insert 11, which is previously inserted into the connecting line 5. An overpressure diaphragm valve is particularly suitable as the overflow valve.

Bei der Ausführungsform nach Fig. 3 sind die Anschlußleitung 5, die Zweigleitung 8 und das Überströmventil 9 in einem Bauteil, nämlich einen mit 12 bezeichneten Rohrstutzen angeordnet bzw. ausgebildet, der über ein Schraubgewinde 13 auf den Druckbe hälter 1 aufschraubbar ist. die Anschlußleitung 5, die innerhalb des Rohrstutzens 12 zentrisch ausgebildet ist, verbindet das Mehrwegeventil 7 mit dem Druckluftbehälter 1. Innerhalb des Rohrstutzens 12 zweigt bei 14 die Zweigleitung 8 ab, die zum Druckbehälter 1 führt. In der Zweigleitung 8 ist das Uberstömventil 9 angeordnet. Im dargestellten Ausfüh rungsbeispiel ist das Schließglied dieses Überströmventils 9 durch eine Kugel 15 gebildet, die durch eine Feder 16 in ihre Schließstellung entsprechend Fig. 3 vorgespannt ist. Das Überströmventil 9 ist über eine seitliche Bohrung 17 zugänglich, die durch eine Schraubkappe 19 verschließbar ist.In the embodiment according to FIG. 3, the connecting line 5, the branch line 8 and the overflow valve 9 are arranged or formed in one component, namely a pipe socket designated 12, which can be screwed onto the pressure vessel 1 via a screw thread 13. the connecting line 5, which is formed centrally within the pipe socket 12, connects the Mehrwegeven til 7 with the compressed air tank 1. Within the pipe socket 12 branches off at 14, the branch line 8, which leads to the pressure vessel 1. The overflow valve 9 is arranged in the branch line 8. In the illustrated embodiment, the closing member of this overflow valve 9 is formed by a ball 15 which is biased by a spring 16 into its closed position according to FIG. 3. The overflow valve 9 is accessible via a lateral bore 17 which can be closed by a screw cap 19.

Im Rohrstutzen 12 ist eine weitere Leitung 20 ausgebildet, die jedoch nicht in die Anschlußleitung 5 einmündet. Diese zusätzliche Leitung 20 kann als weitere Anschlußleitung verwendet werden, um etwa den Behälterinnendruck an einem auf die Anschlußleitung 20 aufgeschraubten Manometer anzuzeigen.A further line 20 is formed in the pipe socket 12, but does not open into the connecting line 5. This additional line 20 can be used as a further connection line, for example to indicate the internal pressure of the container on a manometer screwed onto the connection line 20.

Die Ausführungsform nach Fig. 4 ähnelt der Ausführungsform nach Fig. 3, als auch dort die Anschlußleitung 5, die Zweigleitung 8 und das Überströmventil 9 in einem Rohrstutzen 12 untergebracht sind. Auch im Rohrstutzen 12 nach Fig. 4 kann wahlweise eine weitere Leitung 29 untergebracht sein. Bei der Ausführungsform nach Fig. 4 ist das Ventilschließglied scheibenförmig ausgebildet und in seiner Schließstellung durch eine Feder 16 vorgespannt. Der Einbau des Überströmventiles 9 erfolgt über einen seitlich am Rohrstutzen 12 angesetzten Rohrstutzen 21, der über eine nicht dargestellte Schraubkappe verschließbar ist. Die Ausführungsform nach Fig. 3 bietet gegenüber der Ausführungsform nach Fig. 4 den Vorteil, daß es sich um ein Drehteil handelt.The embodiment according to FIG. 4 is similar to the embodiment according to FIG. 3, as the connecting line 5, the branch line 8 and the overflow valve 9 are also accommodated in a pipe socket 12 there. A further line 29 can optionally also be accommodated in the pipe socket 12 according to FIG. 4. In the embodiment according to FIG. 4, the valve closing member is disc-shaped and biased in its closed position by a spring 16. The installation of the overflow valve 9 takes place via a pipe socket 21 which is attached laterally to the pipe socket 12 and can be closed by means of a screw cap (not shown). The embodiment according to FIG. 3 offers the advantage over the embodiment according to FIG. 4 that it is a turned part.

Claims (6)

1. Quick release aerator for disintegrating material accumulations in storage silos for bulk material by means of air blasts, comprising a container (1) which is connected to a compressed air storage means (6) via a connection line (5) and adapted to be filled with compressed air from the compressed air storage means (6) through a multipath valve (7), said container (1) having an outlet connecting piece (2) and a piston-like valve locking body (3) which is adapted to be reciprocated between the opened and the closed position in a tightly sealing manner and which, when being in the closed position, closes the outlet connecting piece (2) inside the compressed air container (1) against the outside, characterised in that a compressed air supply line (8) is branched off from the connection line (5) between the multipath valve (7) and the compressed air container (1), which compressed air supply line (8) leads into the compressed air container (1) and includes an overflow valve (9).
2. Quick release aerator according to claim 1, characteised in that the overflow valve (9) is adjustable.
3. Quick release aerator according to claim 1 or 2, characterised in that the compressed air supply line (5) is connected to the connection line (5) by means of a T-shaped insert (11).
4. Quick release aerator according to claim 1 or 2, characterised in that the connection line (5), the compressed air supply line (8) as well as the overflow valve (9) are disposed in a socket (12).
5. Quick release aerator according to claim 4, characterised in that the socket (12) is adapted to be screwed upon the compressed air container (1).
6. Quick release aerator according to any of the preceding claims, characterized in that the overflow valve (9) is designed as a preferably spherical locking member which is biased in its closing position inside the branch line (8) by means of compression spring (16).
EP87107276A 1986-05-21 1987-05-19 Quick release aerator for preventing bridge formations in bulk containers Expired EP0246617B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87107276T ATE47114T1 (en) 1986-05-21 1987-05-19 AIR BURST DEVICE FOR DISSOLVING MATERIAL STUCK IN STORAGE SILOS FOR BULK GOODS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3616990A DE3616990C1 (en) 1986-05-21 1986-05-21 Air blast device for resolving material build-up in storage silos for bulk material
DE3616990 1986-05-21

Publications (3)

Publication Number Publication Date
EP0246617A2 EP0246617A2 (en) 1987-11-25
EP0246617A3 EP0246617A3 (en) 1988-08-03
EP0246617B1 true EP0246617B1 (en) 1989-10-11

Family

ID=6301244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87107276A Expired EP0246617B1 (en) 1986-05-21 1987-05-19 Quick release aerator for preventing bridge formations in bulk containers

Country Status (3)

Country Link
EP (1) EP0246617B1 (en)
AT (1) ATE47114T1 (en)
DE (2) DE3616990C1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3742489C2 (en) * 1987-12-15 1998-04-09 Agrichema Materialflusstechnik Air blast device
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
ITBG20010037A1 (en) * 2001-10-19 2003-04-19 Larix Srl BIG VALVE OR INSTANTANEOUS DISCHARGE OF LARGE CAPACITY OF AIRPLANES, FOR FLUIDIFICATION OF GRANULAR AND / OR DUSTY MATERIALS.
DE20316754U1 (en) * 2003-10-31 2003-12-24 Agrilux Beteiligungs Gmbh Air blast device with internal valve unit located at the top
US7837062B2 (en) 2006-03-10 2010-11-23 Martin Engineering Company Air cannon for removal of flowable material from a material handling system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB887309A (en) * 1959-08-05 1962-01-17 Simon Ltd Henry Improved method of and apparatus for the conveying of powdered or pulverulent dry material in bulk
DE2000808C3 (en) * 1970-01-09 1975-08-07 Syrjanowskij Swinzowij Kombinat, Syrjanowsk (Sowjetunion) Device for improving the discharge of bulk material from a bulk material container
DE3223406C2 (en) * 1982-06-23 1985-10-31 VSR Engineering GmbH Fördertechnik, 4330 Mülheim Blowing device for removing blockages in storage silos for bulk goods by means of blasts of air

Also Published As

Publication number Publication date
DE3760730D1 (en) 1989-11-16
EP0246617A2 (en) 1987-11-25
ATE47114T1 (en) 1989-10-15
DE3616990C1 (en) 1987-12-17
EP0246617A3 (en) 1988-08-03

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