EP1528013B1 - Air cannon with upper inner valve unit - Google Patents

Air cannon with upper inner valve unit Download PDF

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Publication number
EP1528013B1
EP1528013B1 EP04025581A EP04025581A EP1528013B1 EP 1528013 B1 EP1528013 B1 EP 1528013B1 EP 04025581 A EP04025581 A EP 04025581A EP 04025581 A EP04025581 A EP 04025581A EP 1528013 B1 EP1528013 B1 EP 1528013B1
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EP
European Patent Office
Prior art keywords
valve
discharge pipe
air blast
cylinder
blast device
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EP04025581A
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German (de)
French (fr)
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EP1528013A1 (en
Inventor
Udo Leibling
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Agrilux Beteiligungs GmbH
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Agrilux Beteiligungs GmbH
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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 present invention relates to an air blast apparatus according to the preamble of claim 1.
  • Puffing devices have been known for a long time in storage containers, such as silos or in process engineering plants, in order to dissolve caking by means of corresponding air blasts or impacts with inert gas.
  • air blast equipment with external valve unit as described in EP 1 223 117 A1 or DE 36 02 207 A1
  • internal valve units as for example from DE 2 402 001, DE 38 00 114 A1 or DE 37 42 489 C2 result.
  • the valve unit In air blowers with internal valve unit, the valve unit is disposed substantially within the compressed air tank, while it is located outside of the compressed air tank in air blowers with external valve unit.
  • Internal valve units have the advantage that in case of malfunction or damage to the valve, the valve parts that can be thrown explosively by the upcoming compressed air, not fly unchecked through the area and can lead to personal injury and property damage, but are trapped in a stable pressure vessel.
  • valve unit In the air blast devices with internal valve unit is still a distinction air blast equipment with underlying valve units, such as in DE 38 00 114 A1 or DE 37 42 489 C2, and overhead valve units, such as in DE 2 402 001. Bottom means here that the valve unit is arranged in the vicinity of the outlet opening, while in overhead valve units, the valve unit is provided on the side opposite the outlet opening of the pressure vessel, so that the discharge pipe must extend substantially through the entire pressure vessel or a large part thereof.
  • Puff units with internal and overhead valve unit also have the advantage that the valve unit with the piston is relatively far away from the outlet opening, so that in systems with high heat development, the valve unit of a lower temperature load is exposed. Another advantage of such an air blast is that the valve unit is better accessible from the outside.
  • Essential in the present invention is the realization that the advantages of an internal and overhead valve unit in an air blast device with the advantages in terms of variable, constructive design with external valve units can be combined. Contrary to the previous opinion that a variable structural design and exact coordination of exhaust pipe and internal valve unit can only be achieved by a high design effort, it has been possible with simple design means a variable and precise design of the valve unit and exhaust pipe by the easy accessibility to the to achieve appropriate components. Accordingly, the exhaust pipe is no longer, as in the prior art, firmly welded to the pressure vessel, but arranged releasably in the pressure vessel together with the valve unit.
  • valve control can be designed so that initially only the Kolbenvorraum is pressurized with compressed air or corresponding gas and preferably after closing the valve of the compressed air tank is preferably filled via a connecting line with an overcurrent or check valve. This ensures that always first the quick exhaust valve is closed to close the exhaust pipe and no compressed air or corresponding gas can escape through the open pressure vessel. This is v. a. then advantageous if several air blast devices are connected in series, since then the filling of the air blast equipment can be done completely automatically.
  • valve cylinder To achieve a dense Kolbenvorraums it has proved to be advantageous in the valve cylinder to provide a valve outlet side opposite lid, which can be inserted over a circumferential nozzle on the valve cylinder, wherein provided between the cylinder wall and the cap nozzle a seal, in particular in the form of an O-ring is, which ensures a good seal.
  • the lid can also be made very compact, so that in the lid also the valve control or essential parts thereof can be integrated, such.
  • valve cylinder and discharge pipe are detachably connected to one another, for example via pin connections, screw connections or a threaded connection.
  • valve outlet for connecting the valve cylinder and exhaust pipe which also serves as a piston impact ring or valve seat for the piston of the valve unit can serve.
  • This impact ring can be welded, for example, with the exhaust pipe and connected to the valve cylinder by pin or screw.
  • valve outlet port or piston impact ring and the valve cylinder are made of a stainless steel material, in particular a chromium-nickel steel and in particular the valve cylinder is honed on the inner surface, whereby high-quality seal rings can be used.
  • the detachable arrangement of exhaust pipe and valve unit in the pressure vessel can preferably be achieved in that the pressure vessel in its container bottoms or cylinder ends at least one, but preferably two so-called.
  • Block flanges which can be welded to the container bottoms and where the exhaust pipe via a or several mounting flanges or the valve unit can be bolted to the pressure vessel via the valve cover.
  • Fig. 1 is a sectional view of an inventive air blast device is shown with a pressure vessel 1, the wall 2 has a cylindrical shape. At the two cylinder ends of the pressure vessel 1, preferably two pressure flanges 3 and 4 are provided centrally in the container wall 2, which are expediently welded to the container wall 2 on the bottom side.
  • the exhaust pipe 7, which extends along the longitudinal axis of the pressure vessel 1 coaxially to the container center to the outlet opening 29 opposite and upper cylinder side of the pressure vessel is welded at its in Fig. 1 upper end at 10 with a valve outlet port 9 in the form of a piece of pipe ,
  • valve outlet 9 is screwed by a thread 11 with a valve cylinder 12 of the valve unit, which forms the housing for a valve piston 13 which is arranged movably in the valve cylinder 12.
  • the valve unit is composed of valve cylinder 12 and piston 13 in the open position, in which the piston 13 is lifted upwards from the flange 9 and the valve opening of the flange 9 releases.
  • air or gas which is stored in the pressure vessel 1 under high pressure, abruptly escape via the exhaust pipe 7 and the passage openings 29 of the mounting flanges 5 and 6.
  • the valve cylinder 12 and the valve outlet port 9 are hereby preferably made of stainless steel, in particular made of a chromium-nickel steel and the valve cylinder 12 expediently honed inside.
  • the valve cylinder 12 is closed at its end opposite the outlet side with a lid 15 which engages over a circumferential neck 14 in the valve cylinder 12.
  • a seal 24 for example, an O-ring is preferably provided, which ensures a tight connection of the lid 15 with the valve cylinder 12 (see FIG. 2).
  • a damping ring 32 is preferably arranged in the cylinder 12.
  • valve control is shown in Fig. 1 in a schematic manner.
  • the valve unit with valve cylinder 12 and piston 13, which is located substantially within the pressure vessel 1, is supplied via the supply line 16 with compressed air or corresponding compressed gas, this via a check valve 18 and a buffer tank 17 and a 3/2-way valve 19 passes into the Kolbenvorraum 30 between the lid 15 and piston 13 of the valve unit.
  • the piston 13 is moved from the open position shown in Fig. 1 in a closed position in which the piston 13 rests with its underside on the valve outlet port 9 and thus closes the valve.
  • Fig. 2 shows in a similar representation as Fig. 1 is a cross-sectional view of another embodiment of an air blast apparatus according to the invention, in which substantially only the control elements for the valve unit have been integrated into the lid 15. Accordingly, similar parts are provided with the same reference numerals as in the embodiment of Fig. 1.
  • Another difference from the embodiment of Fig. 1 is the connection between the valve cylinder 12 and the valve outlet port 9.
  • the exhaust pipe 7 via the valve outlet 9 is not with the Valve cylinder 12 screwed, but the valve outlet 9 is connected via pin connections 28 or corresponding screw with the valve cylinder 12.
  • 3 to 5 show a further embodiment, which differs from the previous embodiments essentially only by the constructive arrangement of individual elements of the valve control, as the air blast apparatus according to the invention operates in the various operating states filling, firing and venting.
  • Fig. 3 the operating state filling is shown, wherein the arrows indicate the air or gas guide.
  • the air or gas is fed into the Kolbenvorraum 30, wherein the 3/2-way valve is set so that a corresponding connection is present.
  • the pressure vessel is filled via the check valve 21 and the connecting line 22.
  • the 3/2-way valve 19 is brought into a position in which the Kolbenvorraum 30 is connected to the vent 20.
  • the piston 13 is displaced by the applied pressure in the pressure vessel 1 in the direction of the valve cylinder cover 15, so that the air or the gas contained in the pressure vessel 1 can escape abruptly via the exhaust pipe 7.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Check Valves (AREA)
  • Toys (AREA)
  • Massaging Devices (AREA)

Abstract

A compressed air pulse generator for clearing blockages in silos and in other free flow equipment, has a pressure reservoir (2) with an outlet tube (7) and with a high pressure valve system mounted inside the reservoir for safety. The valve opens and closes the inner end (11) of the tube and is mounted on the inside of a support flange inside an access port. This ensures that in the event of a rupture of the high pressure valve the broken pieces remain inside the pressure reservoir. The high pressure valve and pulse tube are easily removed for maintenance with the support flange.

Description

Die vorliegende Erfindung betrifft ein Luftstoßgerät nach dem Oberbegriff des Anspruchs 1.The present invention relates to an air blast apparatus according to the preamble of claim 1.

Luftstoßgeräte sind seit langer Zeit bei Lagerbehältern, wie Silos oder in verfahrenstechnischen Anlagen bekannt, um Anbackungen durch entsprechende Luftstöße oder Stöße mit inertem Gas aufzulösen. Hierbei unterscheidet man Luftstoßgeräte mit außenliegender Ventileinheit, wie in der EP 1 223 117 A1 oder der DE 36 02 207 A1 beschrieben und innenliegenden Ventileinheiten, wie sie sich beispielsweise aus der DE 2 402 001, DE 38 00 114 A1 oder der DE 37 42 489 C2 ergeben. Bei Luftstoßgeräten mit innenliegender Ventileinheit, ist die Ventileinheit im wesentlichen innerhalb des Druckluftbehälters angeordnet, während sie bei Luftstoßgeräten mit außenliegender Ventileinheit außerhalb des Druckluftbehälters angeordnet ist. Innenliegende Ventileinheiten besitzen den Vorteil, dass bei Fehlfunktionen oder Beschädigungen des Ventils die Ventilteile, die durch die anstehende Druckluft explosionsartig weggeschleudert werden können, nicht unkontrolliert durch die Gegend fliegen und zu Personen und Sachschäden führen können, sondern im stabilen Druckbehälter gefangen sind.Puffing devices have been known for a long time in storage containers, such as silos or in process engineering plants, in order to dissolve caking by means of corresponding air blasts or impacts with inert gas. A distinction is made between air blast equipment with external valve unit, as described in EP 1 223 117 A1 or DE 36 02 207 A1 and internal valve units, as for example from DE 2 402 001, DE 38 00 114 A1 or DE 37 42 489 C2 result. In air blowers with internal valve unit, the valve unit is disposed substantially within the compressed air tank, while it is located outside of the compressed air tank in air blowers with external valve unit. Internal valve units have the advantage that in case of malfunction or damage to the valve, the valve parts that can be thrown explosively by the upcoming compressed air, not fly unchecked through the area and can lead to personal injury and property damage, but are trapped in a stable pressure vessel.

Bei den Luftstoßgeräten mit innenliegender Ventileinheit unterscheidet man weiterhin Luftstoßgeräte mit untenliegenden Ventileinheiten, wie in der DE 38 00 114 A1 oder der DE 37 42 489 C2, sowie obenliegenden Ventileinheiten, wie beispielsweise in der DE 2 402 001. Untenliegend bedeutet hierbei, dass die Ventileinheit in der Nähe der Austrittsöffnung angeordnet ist, während bei obenliegenden Ventileinheiten, die Ventileinheit an der der Austrittsöffnung gegenüberliegenden Seite des Druckbehälters vorgesehen ist, so dass das Ausblasrohr sich im wesentlichen durch den ganzen Druckbehälter oder einen großen Teil davon erstrecken muss.In the air blast devices with internal valve unit is still a distinction air blast equipment with underlying valve units, such as in DE 38 00 114 A1 or DE 37 42 489 C2, and overhead valve units, such as in DE 2 402 001. Bottom means here that the valve unit is arranged in the vicinity of the outlet opening, while in overhead valve units, the valve unit is provided on the side opposite the outlet opening of the pressure vessel, so that the discharge pipe must extend substantially through the entire pressure vessel or a large part thereof.

Luftstoßgeräte mit innen- und obenliegender Ventileinheit weisen zudem den Vorteil auf, dass die Ventileinheit mit dem Kolben relativ weit von der Austrittsöffnung entfernt ist, so dass bei Anlagen mit großer Hitzeentwicklung die Ventileinheit einer geringeren Temperaturbelastung ausgesetzt ist. Ein weiterer Vorteil eines solchen Luftstoßgerätes besteht darin, dass die Ventileinheit besser von außen zugänglich ist.Puff units with internal and overhead valve unit also have the advantage that the valve unit with the piston is relatively far away from the outlet opening, so that in systems with high heat development, the valve unit of a lower temperature load is exposed. Another advantage of such an air blast is that the valve unit is better accessible from the outside.

Allerdings erfordern diese Luftstoßgeräte einen höheren Aufwand bei der Herstellung und schränken die konstruktive Variabilität stärker ein, da die Ventileinheit und das Ausblasrohr in dem Druckbehälter schwer zugänglich sind. Dies ist insbesondere für die Einstellung bzw. Nacharbeitung des Ventilsitzes, bei dem der Kolben der Ventileinheit beispielsweise direkt auf dem Ausblasrohr aufsitzt (vgl. DE 32 23 406 A1 bzw. DE 2 402 001), sehr nachteilig.However, these air blast machines require a greater effort in the manufacture and limit the structural variability more, since the valve unit and the Ausblasrohr are difficult to access in the pressure vessel. This is very disadvantageous in particular for the adjustment or reworking of the valve seat, in which the piston of the valve unit, for example, rests directly on the blow-off pipe (cf DE 32 23 406 A1 or DE 2 402 001).

Dokument US-A-3788527 beschreibt ein Luftstoßgerät mit dem Merkmalen des Oberbegriffs des Anspruchs 1. Das in der US-A-3788527 beschriebene luftstoßgerät weist jedoch den Nachteil einer sehr geringeren Wartungsfreundlichtkeit auf.Document US-A-3788527 describes an air blast apparatus having the features of the preamble of claim 1. However, the air blast apparatus described in US-A-3788527 has the disadvantage of a very low serviceability.

Es ist deshalb Aufgabe der vorliegenden Erfindung die Nachteile des Standes der Technik zu beseitigen und insbesondere ein Luftstoßgerät mit oben- und innenliegender Ventileinheit bereitzustellen, bei dem die Zugäuglichkeit zur Ventileinheit und zum inneren, ventilseitigen Ende des Ausblasrohres verbessert ist.It is therefore an object of the present invention to overcome the disadvantages of the prior art, and more particularly to provide an air blast apparatus with top and interior valve unit, in which the accessibility to the valve unit and the inner, valve-side end of the exhaust pipe is improved.

Diese Aufgabe wird gelöst durch ein Luftstoßgerät mit den Merkmalen des Anspruchs 1. Vorteilhafte Ausgestaltungen sind Gegenstand der abhängigen Ansprüche.This object is achieved by an air blast apparatus with the features of claim 1. Advantageous embodiments are the subject of the dependent claims.

Wesentlich bei der vorliegenden Erfindung ist die Erkenntnis, dass die Vorteile einer innen- und obenliegenden Ventileinheit bei einem Luftstoßgerät mit den Vorteilen bezüglich der variablen, konstruktiven Gestaltung bei außenliegenden Ventileinheiten kombinierbar ist. Entgegen der bisherigen Auffassung, dass eine variable konstruktive Gestaltung und exakte Abstimmung von Ausblasrohr und innenliegender Ventileinheit nur durch einen hohen konstruktiven Aufwand zu erreichen sei, ist es gelungen mit einfachen konstruktiven Mitteln eine variable und präzise Gestaltung von Ventileinheit und Ausblasrohr durch die leichte Zugänglichkeit zu den entsprechenden Bauteilen zu erzielen. Entsprechend ist das Ausblasrohr nicht mehr, wie beim Stand der Technik, fest mit dem Druckbehälter verschweißt, sondern zusammen mit der Ventileinheit lösbar in dem Druckbehälter angeordnet.Essential in the present invention is the realization that the advantages of an internal and overhead valve unit in an air blast device with the advantages in terms of variable, constructive design with external valve units can be combined. Contrary to the previous opinion that a variable structural design and exact coordination of exhaust pipe and internal valve unit can only be achieved by a high design effort, it has been possible with simple design means a variable and precise design of the valve unit and exhaust pipe by the easy accessibility to the to achieve appropriate components. Accordingly, the exhaust pipe is no longer, as in the prior art, firmly welded to the pressure vessel, but arranged releasably in the pressure vessel together with the valve unit.

Damit wird es möglich neben dem Ventilsitz auch die gesamte Ventileinheit so präzise zu fertigen, dass auch ein absolut dichter Kolbenvorraum bei der Ventileinheit zur Verfügung gestellt werden kann. Dies wiederum bewirkt, dass die Ventilsteuerung so gestaltet werden kann, dass zunächst nur der Kolbenvorraum mit Druckluft oder entsprechendem Gas beaufschlagt wird und erst nach Schließen des Ventils der Druckluftbehälter vorzugsweise über eine Verbindungsleitung mit einem Überstrom- bzw. Rückschlagventil gefüllt wird. Damit ist sichergestellt, dass immer zuerst das Schnellentlüftungsventil zum Verschließen des Ausblasrohres geschlossen ist und keine Druckluft oder entsprechendes Gas über den offenen Druckbehälter entweichen kann. Dies ist v. a. dann vorteilhaft, wenn mehrere Luftstoßgeräte hintereinander geschaltet sind, da dann die Befüllung der Luftstoßgeräte vollständig automatisch erfolgen kann.This makes it possible in addition to the valve seat and the entire valve unit to produce so precisely that even an absolutely tight Kolbenvorraum can be provided in the valve unit. This in turn causes the valve control can be designed so that initially only the Kolbenvorraum is pressurized with compressed air or corresponding gas and preferably after closing the valve of the compressed air tank is preferably filled via a connecting line with an overcurrent or check valve. This ensures that always first the quick exhaust valve is closed to close the exhaust pipe and no compressed air or corresponding gas can escape through the open pressure vessel. This is v. a. then advantageous if several air blast devices are connected in series, since then the filling of the air blast equipment can be done completely automatically.

Zur Erzielung eines dichten Kolbenvorraums hat es sich als vorteilhaft erwiesen, bei dem Ventilzylinder einen der Ventilaustrittsseite gegenüber liegenden Deckel vorzusehen, der über einen umlaufenden Stutzen auf den Ventilzylinder gesteckt werden kann, wobei zwischen Zylinderwand und Deckelstutzen eine Dichtung insbesondere in Form eines O-Rings vorgesehen ist, welche eine gute Abdichtung gewährleistet.To achieve a dense Kolbenvorraums it has proved to be advantageous in the valve cylinder to provide a valve outlet side opposite lid, which can be inserted over a circumferential nozzle on the valve cylinder, wherein provided between the cylinder wall and the cap nozzle a seal, in particular in the form of an O-ring is, which ensures a good seal.

Auf diese Weise kann der Deckel auch sehr kompakt ausgeführt werden, so dass in dem Deckel ferner die Ventilsteuerung oder wesentliche Teile davon integriert werden können, wie z. B. ein Mehrwegeventil bzw. 3/2-Wegeventil, Überström- bzw. Rückschlagventile, Verbindungsleitungen usw.In this way, the lid can also be made very compact, so that in the lid also the valve control or essential parts thereof can be integrated, such. B. a multi-way valve or 3/2-way valve Überström- or check valves, connecting lines, etc.

Die erfindungsgemäße Lösbarkeit des Ausblasrohrs und der Ventileinheit von dem Druckbehälter kann insbesondere dadurch erreicht werden, dass Ventilzylinder und Ausblasrohr lösbar miteinander verbunden sind, beispielsweise über Stiftverbindungen, Schraubverbindungen oder eine Gewindeverbindung.The solubility of the discharge pipe and the valve unit of the pressure vessel according to the invention can be achieved, in particular, in that the valve cylinder and discharge pipe are detachably connected to one another, for example via pin connections, screw connections or a threaded connection.

Ferner ist es vorteilhaft, wenn zwischen Ventilzylinder und Ausblasrohr ein Ventilausgangsstutzen zur Verbindung von Ventilzylinder und Ausblasrohr vorgesehen ist, der gleichzeitig auch als Kolbenaufschlagring bzw. Ventilsitz für den Kolben der Ventileinheit dienen kann. Dieser Aufschlagring kann beispielsweise mit dem Ausblasrohr verschweißt und mit dem Ventilzylinder durch Stift- oder Schraubverbindungen verbunden sein.Furthermore, it is advantageous if between valve cylinder and exhaust pipe, a valve outlet for connecting the valve cylinder and exhaust pipe is provided, which also serves as a piston impact ring or valve seat for the piston of the valve unit can serve. This impact ring can be welded, for example, with the exhaust pipe and connected to the valve cylinder by pin or screw.

Vorzugsweise sind der Ventilausgangsstutzen bzw. Kolbenaufschlagring und der Ventilzylinder aus einem Edelstahlmaterial, insbesondere einem Chrom-Nickel-Stahl gefertigt und insbesondere der Ventilzylinder an der Innenfläche gehont ist, wodurch hochwertige Gleitringe verwendet werden können.Preferably, the valve outlet port or piston impact ring and the valve cylinder are made of a stainless steel material, in particular a chromium-nickel steel and in particular the valve cylinder is honed on the inner surface, whereby high-quality seal rings can be used.

Die lösbare Anordnung von Ausblasrohr und Ventileinheit im Druckbehälter kann vorzugsweise dadurch erreicht werden, dass der Druckbehälter in seinen Behälterböden bzw. Zylinderenden mindestens ein, vorzugsweise jedoch zwei sog. Blockflansche aufweist, die mit den Behälterböden verschweißt sein können und an denen das Ausblasrohr über einen oder mehrere Befestigungsflansche bzw. die Ventileinheit über den Ventildeckel mit dem Druckbehälter verschraubt sein können.The detachable arrangement of exhaust pipe and valve unit in the pressure vessel can preferably be achieved in that the pressure vessel in its container bottoms or cylinder ends at least one, but preferably two so-called. Block flanges, which can be welded to the container bottoms and where the exhaust pipe via a or several mounting flanges or the valve unit can be bolted to the pressure vessel via the valve cover.

Weitere Vorteile, Kennzeichen und Merkmale der vorliegenden Erfindung werden bei der nachfolgenden detaillierten Beschreibung der Ausführungsbeispiele anhand der beigefügten Zeichnungen deutlich. Die Zeichnungen zeigen dabei in rein schematischer Weise

Fig. 1
eine Schnittansicht sowie teilweise Schemadarstellung eines erfindungsgemäßen Luftstoßgerätes;
Fig. 2
eine weitere Schnittansicht eines erfindungsgemäßen Luftstoßgerätes; und in
Fig. 3 bis 5
Schnittansichten einer weiteren Ausführungsform des erfindungsgemäßen Luftstoßgerätes bei den verschiedenen Betriebszuständen Füllen, Abschuss und Entlüften.
Further advantages, characteristics and features of the present invention will become apparent in the following detailed description of the embodiments with reference to the accompanying drawings. The drawings show in a purely schematic way
Fig. 1
a sectional view and partial schematic representation of an air blast apparatus according to the invention;
Fig. 2
a further sectional view of an air blast apparatus according to the invention; and in
Fig. 3 to 5
Sectional views of another embodiment of the air blast apparatus according to the invention in the various operating conditions filling, launching and venting.

In Fig. 1 ist in einer Schnittansicht ein erfindungsgemäßes Luftstoßgerät mit einem Druckbehälter 1 dargestellt, dessen Wandung 2 eine zylinderförmige Gestalt aufweist. An den beiden Zylinderenden des Druckbehälters 1 sind einander gegenüberliegend vorzugsweise zentral zwei Druckflansche 3 und 4 vorgesehen in der Behälterwandung 2, die zweckmäßigerweise mit der Behälterwandung 2 bodenseitig verschweißt sind.In Fig. 1 is a sectional view of an inventive air blast device is shown with a pressure vessel 1, the wall 2 has a cylindrical shape. At the two cylinder ends of the pressure vessel 1, preferably two pressure flanges 3 and 4 are provided centrally in the container wall 2, which are expediently welded to the container wall 2 on the bottom side.

An dem in der Fig. 1 unteren Blockflansch 3 sind miteinander verschweißte Befestigungsflansche 5 und 6 angeschraubt. An den Befestigungsflanschen 5 und 6 ist bei 8 wiederum das Ausblasrohr 7 angeschweißt, welches denselben Innendurchmesser wie die Durchtrittsöffnungen 29 der Befestigungsflasche 5 und 6 aufweist.At the lower in Fig. 1 block flange 3 are welded together mounting flanges 5 and 6 screwed. At the mounting flanges 5 and 6, in turn, the exhaust pipe 7 is welded at 8, which has the same inner diameter as the passage openings 29 of the fastening bottle 5 and 6.

Das Ausblasrohr 7, welches sich entlang der Längsachse des Druckbehälters 1 koaxial zu dessen Behältermitte zu der der Austrittsöffnung 29 gegenüberliegenden und oberen Zylinderseite des Druckbehälters erstreckt, ist an seinem in der Fig. 1 oberen Ende bei 10 mit einem Ventilausgangsstutzen 9 in Form eines Rohrstücks verschweißt.The exhaust pipe 7, which extends along the longitudinal axis of the pressure vessel 1 coaxially to the container center to the outlet opening 29 opposite and upper cylinder side of the pressure vessel is welded at its in Fig. 1 upper end at 10 with a valve outlet port 9 in the form of a piece of pipe ,

Der Ventilausgangsstutzen 9 ist über ein Gewinde 11 mit einem Ventilzylinder 12 der Ventileinheit verschraubt, welches das Gehäuse für einen Ventilkolben 13 bildet, der im Ventilzylinder 12 beweglich angeordnet ist. Bei der in Fig. 1 gezeigten Stellung ist die Ventileinheit bestehend aus Ventilzylinder 12 und Kolben 13 in der geöffneten Stellung, in welcher der Kolben 13 nach oben hin vom Flansch 9 angehoben ist und die Ventilöffnung des Flansches 9 freigibt. Dadurch kann Luft oder Gas, welches im Druckbehälter 1 unter hohem Druck gespeichert ist, schlagartig über das Ausblasrohr 7 und die Durchtrittsöffnungen 29 der Befestigungsflansche 5 und 6 austreten. Der Ventilzylinder 12 und der Ventilausgangsstutzen 9 sind hierbei vorzugsweise aus Edelstahl, insbesondere aus einem Chrom-Nickel-Stahl gefertigt und der Ventilzylinder 12 innen zweckmäßigerweise gehont.The valve outlet 9 is screwed by a thread 11 with a valve cylinder 12 of the valve unit, which forms the housing for a valve piston 13 which is arranged movably in the valve cylinder 12. In the position shown in Fig. 1, the valve unit is composed of valve cylinder 12 and piston 13 in the open position, in which the piston 13 is lifted upwards from the flange 9 and the valve opening of the flange 9 releases. As a result, air or gas, which is stored in the pressure vessel 1 under high pressure, abruptly escape via the exhaust pipe 7 and the passage openings 29 of the mounting flanges 5 and 6. The valve cylinder 12 and the valve outlet port 9 are hereby preferably made of stainless steel, in particular made of a chromium-nickel steel and the valve cylinder 12 expediently honed inside.

Der Ventilzylinder 12 ist an seinem der Austrittsseite gegenüberliegenden Ende mit einem Deckel 15 verschlossen, der über einen umlaufenden Stutzen 14 in den Ventilzylinder 12 eingreift. Zwischen dem Stutzen 14 des Deckels 15 und dem Ventilzylinder 12 ist vorzugsweise eine Dichtung 24, beispielsweise ein O-Ring vorgesehen, der eine dichte Verbindung des Deckels 15 mit dem Ventilzylinder 12 gewährleistet (siehe Fig. 2). Zur Dämpfung des Kolbenrückschlages ist vorzugsweise ein Dämpfungsring 32 im Zylinder 12 angeordnet.The valve cylinder 12 is closed at its end opposite the outlet side with a lid 15 which engages over a circumferential neck 14 in the valve cylinder 12. Between the nozzle 14 of the lid 15 and the valve cylinder 12, a seal 24, for example, an O-ring is preferably provided, which ensures a tight connection of the lid 15 with the valve cylinder 12 (see FIG. 2). For damping the piston return, a damping ring 32 is preferably arranged in the cylinder 12.

Oberhalb des Deckels 15 ist in der Fig. 1 in schematischer Weise die Ventilsteuerung dargestellt. Die Ventileinheit mit Ventilzylinder 12 und Kolben 13, die sich im wesentlichen innerhalb des Druckbehälters 1 befindet, wird über die Versorgungsleitung 16 mit Druckluft oder entsprechendem Druckgas versorgt, wobei dieses über ein Rückschlagventil 18 und einen Pufferbehälter 17 sowie ein 3/2-Wegeventil 19 in den Kolbenvorraum 30 zwischen Deckel 15 und Kolben 13 der Ventileinheit gelangt. Durch die Druckluft bzw. das entsprechende Gas wird der Kolben 13 aus der in Fig. 1 dargestellten geöffneten Stellung in eine geschlossene Stellung bewegt, in der der Kolben 13 mit seiner Unterseite auf dem Ventilausgangsstutzen 9 aufliegt und damit das Ventil verschließt. Erst wenn durch weitere Druckluftzufuhr der Druck im Kolbenvorraum 30 größer ist als der Gegendruck des Überström- bzw. Rückschlagventils 21 kann die Druckluft oder das entsprechende Gas über die Verbindungsleitung 22 auch in den Druckbehälter 1 gelangen. Erreicht wird diese Druckluftzufuhr zuerst zum Kolbenvorraum und erst dann in den Druckluftbehälter durch einen entsprechenden Federdruck des Überström- bzw. Rückschlagventils 21, wodurch im Kolbenvorraum 30 immer ein höherer Druck als im Behälter 1 herrscht. Dadurch baut sich in dem Druckbehälter 1 ein Vorrat an Druckluft oder entsprechendem Gas auf, bis der gewünschte Druck, der durch das Überstrom- bzw. Rückschlagventil 23 eingestellt wird, erreicht ist. Soll das Luftstoßgerät schlagartig ausgeblasen werden, wird das 3/2-Wegeventil 19 in die in Fig. 1 dargestellte Stellung gebracht, so dass der Kolbenvorraum 30 über die Entlüftung 20 entlüftet wird und der Kolben 13 auf Grund des Drucks im Druckbehälter 1 in die in Fig. 1 gezeigte Position zurückschnellt, so dass das in dem Druckbehälter 1 gespeicherte Gas schlagartig über das Ausblasrohr 7 entweichen kann.Above the lid 15, the valve control is shown in Fig. 1 in a schematic manner. The valve unit with valve cylinder 12 and piston 13, which is located substantially within the pressure vessel 1, is supplied via the supply line 16 with compressed air or corresponding compressed gas, this via a check valve 18 and a buffer tank 17 and a 3/2-way valve 19 passes into the Kolbenvorraum 30 between the lid 15 and piston 13 of the valve unit. By the compressed air or the corresponding gas, the piston 13 is moved from the open position shown in Fig. 1 in a closed position in which the piston 13 rests with its underside on the valve outlet port 9 and thus closes the valve. Only when the pressure in the piston chamber 30 is greater than the back pressure of the overflow or check valve 21 by further compressed air supply, the compressed air or the corresponding gas via the connecting line 22 into the pressure vessel 1 reach. This compressed air supply is first reached to the piston pre-chamber and only then into the compressed air tank by a corresponding spring pressure of the overflow or check valve 21, whereby in the Kolbenvorraum 30 always a higher pressure than in the container 1 prevails. As a result, a supply of compressed air or corresponding gas builds up in the pressure vessel 1 until the desired pressure, which is set by the overflow or check valve 23, is reached. If the air blast device to be blown out suddenly, the 3/2-way valve 19 is brought into the position shown in Fig. 1, so that the Kolbenvorraum 30 is vented through the vent 20 and the piston 13 due to the pressure in the pressure vessel 1 in the in 1, so that the gas stored in the pressure vessel 1 can escape abruptly via the exhaust pipe 7.

Die Fig. 2 zeigt in einer ähnlichen Darstellung wie die Fig. 1 eine Querschnittsansicht einer weiteren Ausführungsform eines erfindungsgemäßen Luftstoßgerätes, bei dem im wesentlichen nur die Steuerungselemente für die Ventileinheit in den Deckel 15 integriert worden sind. Entsprechend sind ähnliche Teile mit den gleichen Bezugszeichen versehen wie bei der Ausführungsform der Fig. 1. Ein weiterer Unterschied zur Ausführungsform der Fig. 1 besteht in der Verbindung zwischen Ventilzylinder 12 und Ventilausgangsstutzen 9. Hier ist das Ausblasrohr 7 über den Ventilausgangsstutzen 9 nicht mit dem Ventilzylinder 12 verschraubt, sondern der Ventilausgangsstutzen 9 ist über Stiftverbindungen 28 oder auch entsprechende Schraubverbindungen mit dem Ventilzylinder 12 verbunden.Fig. 2 shows in a similar representation as Fig. 1 is a cross-sectional view of another embodiment of an air blast apparatus according to the invention, in which substantially only the control elements for the valve unit have been integrated into the lid 15. Accordingly, similar parts are provided with the same reference numerals as in the embodiment of Fig. 1. Another difference from the embodiment of Fig. 1 is the connection between the valve cylinder 12 and the valve outlet port 9. Here, the exhaust pipe 7 via the valve outlet 9 is not with the Valve cylinder 12 screwed, but the valve outlet 9 is connected via pin connections 28 or corresponding screw with the valve cylinder 12.

Darüber hinaus sind bei dieser Darstellung die Abdichtung des Kolbenvorraums 30 durch die Dichtung 24 zwischen Ventilzylinder 12 und Stutzen 14 des Deckels 15 sowie die Dichtungen 25 und 26 am Kolben 13 deutlich dargestellt. Aufgrund dieser Dichtungsanordnung mit den Dichtungen 24, 25 und 26 wird erreicht, dass ein besonders dichter Kolbenvorraum 30 erreicht wird, der insbesondere beim Verschließen der Ventileinheit und somit des Druckbehälters 1 von besonderer Bedeutung ist, da damit ein Ausströmen der anstehenden Druckluft oder des entsprechenden Gases aus dem Kolbenvorraum über den Druckbehälter oder das Ausblasrohr 7 und somit ein nicht ordnungsgemäßes Schließen der Ventileinheit vermieden werden kann.In addition, in this illustration, the sealing of the Kolbenvorraums 30 through the seal 24 between the valve cylinder 12 and port 14 of the lid 15 and the seals 25 and 26 on the piston 13 are clearly shown. Due to this seal arrangement With the seals 24, 25 and 26 it is achieved that a particularly dense Kolbenvorraum 30 is achieved, which is particularly important when closing the valve unit and thus of the pressure vessel 1 of particular importance, since thus a leakage of the upcoming compressed air or the corresponding gas from the Kolbenvorraum can be avoided via the pressure vessel or the exhaust pipe 7 and thus improper closing of the valve unit.

Die Fig. 3 bis 5 zeigen an einer weiteren Ausführungsform, die sich im wesentlichen lediglich durch die konstruktive Anordnung einzelner Elemente der Ventilsteuerung von den vorangegangenen Ausführungsformen unterscheidet, wie das erfindungsgemäße Luftstoßgerät in den verschiedenen Betriebszuständen Füllen, Abschießen und Entlüften arbeitet.3 to 5 show a further embodiment, which differs from the previous embodiments essentially only by the constructive arrangement of individual elements of the valve control, as the air blast apparatus according to the invention operates in the various operating states filling, firing and venting.

In der Fig. 3 ist der Betriebszustand Füllen gezeigt, wobei die Pfeile die Luft- bzw. Gasführung anzeigen. Wie bereits in Fig. 1 geschildert, wird über die Luft- bzw. Gaszufuhr 16 und das Rückschlagventil 18 durch den Vorratsbehälter 17 die Luft bzw. das Gas in den Kolbenvorraum 30 geführt, wobei das 3/2-Wegeventil so gestellt ist, dass eine entsprechende Verbindung vorhanden ist. Sobald im Kolbenvorraum 30 ein entsprechend hoher Druck aufgebaut ist, wird über das Rückschlagventil 21 und die Verbindungsleitung 22 der Druckbehälter gefüllt.In Fig. 3, the operating state filling is shown, wherein the arrows indicate the air or gas guide. As already described in Fig. 1, via the air or gas supply 16 and the check valve 18 through the reservoir 17, the air or the gas is fed into the Kolbenvorraum 30, wherein the 3/2-way valve is set so that a corresponding connection is present. Once a correspondingly high pressure is built up in the piston chamber 30, the pressure vessel is filled via the check valve 21 and the connecting line 22.

Durch das Rückschlagventil 18 und Überströmventil 21 wird sichergestellt, dass auch bei Druckabfall in der Versorgungsleitung 16 immer im Kolbenvorraum 30 ein ausreichender Kolbenschließdruck erhalten bleibt.By the check valve 18 and spill valve 21 ensures that even with pressure drop in the supply line 16 always in the piston chamber 30 a sufficient piston closing pressure is maintained.

Für den Abschuss wird, wie in Fig. 4 gezeigt ist, das 3/2-Wegeventil 19 in eine Stellung gebracht, in der der Kolbenvorraum 30 mit der Entlüftung 20 verbunden ist. Dadurch wird der Kolben 13 durch den anstehenden Druck im Druckbehälter 1 in Richtung des Ventilzylinderdeckels 15 verschoben, so dass die Luft oder das Gas, die in dem Druckbehälter 1 enthalten ist, über das Ausblasrohr 7 schlagartig entweichen kann.For the launch, as shown in Fig. 4, the 3/2-way valve 19 is brought into a position in which the Kolbenvorraum 30 is connected to the vent 20. As a result, the piston 13 is displaced by the applied pressure in the pressure vessel 1 in the direction of the valve cylinder cover 15, so that the air or the gas contained in the pressure vessel 1 can escape abruptly via the exhaust pipe 7.

Unter Umständen ist es auch erforderlich den Druckbehälter 1 z. B. in Notfällen auch ohne Abschuss zu entlüften. Hierzu kann das unter Druck stehende Gas im Druckbehälter 1 über die Verbindungsleitung 22, das Überström- bzw. Rückschlagventil 23 und ein entsprechendes Ventil 31 in der Zuführleitung 16 entweichen.Under certain circumstances, it is also necessary the pressure vessel 1 z. B. in emergencies without firing. For this purpose, the pressurized gas in the pressure vessel 1 via the connecting line 22, the overflow or check valve 23 and a corresponding valve 31 in the supply line 16 escape.

Claims (11)

  1. An air blast device for impulsively discharging gaseous media, preferably air or inert gases, particularly for loosening baked-on material and eliminating flow problems in industrial processing devices, such as silos and the like, including a pressure container (1) for storing the gaseous medium under pressure and a valve unit with a cylinder (12) and a piston (13) movable therein for impulsively discharging the stored medium, wherein the valve unit is disposed substantially within the pressure container (1) and can close and open a discharge pipe (7), through which the gaseous medium is discharged, and wherein the outlet side of the discharge pipe is disposed on a side of the pressure container and the valve unit closing the discharge pipe is provided on the opposite side of the pressure container so that the discharge pipe extends substantially through the pressure container (1), characterised in that the valve unit (12, 13) and the discharge pipe (7) are each releasably arranged in the pressure container (1), the valve cylinder (12) also being releasably connected to the discharge pipe (7).
  2. An air blast device as claimed in Claim 1, characterised in that a piston head space (30) is defined in the valve unit (12, 13) between the piston (13) and a cover (15) closing the valve cylinder (12) with respect to the valve outlet side, the supply of the gaseous medium being so arranged that it is admitted firstly to the piston head space (30) in the valve cylinder (12) between the valve piston (13) and cover (15) and only subsequently to the pressure container (1).
  3. An air blast device as claimed in Claim 3, characterised in that the piston head space (30) and the pressure container (1) are connected by means of a conduit with an overflow and non-return valve (21).
  4. An air blast device as claimed in one of the preceding claims, characterised in that the valve cylinder (12) includes a cover (15) opposite to the valve outlet side, which is pushed onto the valve cylinder, particularly by means of a circular connecting piece (14), whereby provided between the cylinder wall and cover connecting piece there is a seal (24), particularly in the form of an O-ring, by means of which the cover (15) and valve cylinder (12) are connected together in a gas-tight manner, so that a sealed piston head space (30) is defined.
  5. An air blast device as claimed in one of the preceding claims, characterised in that the elements of the valve control, such as a 3/2-way valve (19), non-return valves (18, 21, 23), connecting conduits (22) or the like or parts thereof are integrated into a cover (15) of the valve cylinder (12) opposite to the valve outlet side.
  6. An air blast device as claimed in one of the preceding claims, characterised in that the valve cylinder (12) is releasably connected to the discharge pipe (7) by means of peg connections (28) or by a screw coupling (11).
  7. An air blast device as claimed in one of the preceding claims, characterised in that provided between the valve cylinder (12) and discharge pipe (7) there is a valve outlet connecting piece (9) in the form of a valve seat, particularly of chrome-nickel steel, which is rigidly connected, preferably welded, particularly to the discharge pipe (7).
  8. An air blast device as claimed in one of the preceding claims, characterised in that provided in the base of the pressure container (1) there is at least one and preferably two block flanges (3, 4), the discharge pipe (7) being releasably connected, preferably by means of a screw coupling, to the at least one block flange (3), preferably by means of one or more connecting flanges (5, 6) and the valve unit (12, 13) being arranged, particularly bolted, to the second block flange (4), particularly via a cover (15).
  9. An air blast device as claimed in one of the preceding claims, characterised in that the diameter of the outlet opening (27) of the valve unit (12, 13) or of the valve outlet connecting piece (9) can be smaller than the diameter of the discharge pipe (7), whereby, in particular, the length of the discharge pipe can be a multiple of its diameter.
  10. An air blast device as claimed in Claim 9, characterised in that the outlet opening (27) of the valve unit can be enlarged continuously, in a graduated manner or incrementally to the diameter of the discharge pipe (7), particularly in the vicinity of the valve outlet connecting piece (9).
  11. An air blast device as claimed in one of Claims 7 to 10, characterised in that the valve outlet connecting piece (9) has a flow opening (29) for the discharging gaseous medium, which can have a smaller diameter than the discharge pipe (7) and the outlet opening (29) in the flange (5,6).
EP04025581A 2003-10-31 2004-10-27 Air cannon with upper inner valve unit Expired - Lifetime EP1528013B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20316754U DE20316754U1 (en) 2003-10-31 2003-10-31 Air blast device with internal valve unit located at the top
DE20316754U 2003-10-31

Publications (2)

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EP1528013A1 EP1528013A1 (en) 2005-05-04
EP1528013B1 true EP1528013B1 (en) 2006-06-28

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EP04025581A Expired - Lifetime EP1528013B1 (en) 2003-10-31 2004-10-27 Air cannon with upper inner valve unit

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EP (1) EP1528013B1 (en)
AT (1) ATE331674T1 (en)
DE (2) DE20316754U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010012637U1 (en) 2010-09-15 2010-11-18 Agrilux Beteiligungs Gmbh Air blast device with an air blast device with hot blast nozzle arranged thereon
US7837062B2 (en) 2006-03-10 2010-11-23 Martin Engineering Company Air cannon for removal of flowable material from a material handling system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070209648A1 (en) * 2006-03-10 2007-09-13 Martin Engineering Company Air cannon for removal of flowable material from a material handling system
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

Family Cites Families (6)

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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
US3915339A (en) * 1974-07-08 1975-10-28 Matson C G Quick-release aerator for introducing high pressure air into a container to facilitate dispensing
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
DE3616990C1 (en) * 1986-05-21 1987-12-17 Agrichema Materialflusstechnik Air blast device for resolving material build-up in storage silos for bulk material
DE9404892U1 (en) * 1994-03-22 1994-05-19 Agrichema Materialflußtechnik GmbH, 55257 Budenheim Blow device for the sudden blowing out of air
US6702248B2 (en) * 2002-01-16 2004-03-09 Global Manufacturing, Inc. Blast aerator with springless, pneumatically dampened actuator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7837062B2 (en) 2006-03-10 2010-11-23 Martin Engineering Company Air cannon for removal of flowable material from a material handling system
DE202010012637U1 (en) 2010-09-15 2010-11-18 Agrilux Beteiligungs Gmbh Air blast device with an air blast device with hot blast nozzle arranged thereon

Also Published As

Publication number Publication date
ATE331674T1 (en) 2006-07-15
EP1528013A1 (en) 2005-05-04
DE20316754U1 (en) 2003-12-24
DE502004000872D1 (en) 2006-08-10

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