EP1442999A1 - Pneumatic knocker - Google Patents

Pneumatic knocker Download PDF

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Publication number
EP1442999A1
EP1442999A1 EP04405024A EP04405024A EP1442999A1 EP 1442999 A1 EP1442999 A1 EP 1442999A1 EP 04405024 A EP04405024 A EP 04405024A EP 04405024 A EP04405024 A EP 04405024A EP 1442999 A1 EP1442999 A1 EP 1442999A1
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EP
European Patent Office
Prior art keywords
piston
chamber
percussion piston
percussion
knocker
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04405024A
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German (de)
French (fr)
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EP1442999B1 (en
Inventor
Thomas Kopp
Martin Deller
Werner Lenherr
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Findeva AG
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Findeva AG
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Publication of EP1442999A1 publication Critical patent/EP1442999A1/en
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Publication of EP1442999B1 publication Critical patent/EP1442999B1/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
    • B65D88/66—Large containers characterised by means facilitating filling or emptying preventing bridge formation using vibrating or knocking devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • B06B1/183—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid operating with reciprocating masses

Definitions

  • the invention relates to a pneumatic knocker, for example for tapping container walls, with a Housing in which a percussion piston is mounted, with Compressed air against the retroactive force of a spring against one Upper wall of the housing is movable, which spring in an upper Chamber is arranged, which has a vent hole and with at least one air duct through which one under the piston arranged lower chamber is vented when the percussion piston has performed a predetermined stroke.
  • Pneumatic knockers of the type mentioned have been around for a long time known.
  • DE 25 49 551 A discloses one pneumatically working knocker, especially for knocking of dusty material provided by container walls is.
  • This has a cylinder tube in which a percussion piston is stored.
  • the cylinder tube is at one end with one Cover and closed at another end with a baffle plate.
  • the percussion piston is against the retroactive force the spring raised and after changing a valve against the baffle moves.
  • Another pneumatic knocker of this type is from the EP 0 345 484 has become known. This is in a side wall of the housing a control hole is provided. This control hole is connected to a 3/2-way air valve via a control line. This valve is also with a connection hole in the Valve wall connected. This is supposed to be an automatic clock control the piston strokes without mechanical interaction with the piston Parts may be possible.
  • the disadvantage of this knocker however, the comparatively complex manufacture and Assembly.
  • the inventors set themselves the task of pneumatically to create working knockers of the type mentioned, the more cost-effective is manufacturable and easier to assemble.
  • the knocker should still be reliable.
  • the task is for a pneumatic knocker mentioned type solved in that a control element in the percussion piston is arranged, for quick ventilation of the lower Chamber at a predetermined stroke of the percussion piston Air channel releases and this when returning the percussion piston closes in the lower striking position.
  • a pressure chamber is arranged in the control piston and the control piston can be brought into a closed position in which the pressure chamber is connected to a pressure line. By venting the Pressure chamber can then lift the control piston and the air duct be released for quick ventilation. Bleeding the Pressure space takes place according to a development of the invention through a vent hole in the piston housing. Preferably several such vent holes are provided, each except for one vent hole, all are closed. The vent holes are in different lifting heights and correspond thus different clout forces. By closing or opening a vent hole can Power changed in a simple way and thus to the respective Requirements are adjusted. The feather that the Percussion piston loaded, does not have to be replaced here.
  • FIG 1 shows a knocker 1, which is a cylindrical housing 2 has a lid 3 at one end and the other End with a baffle plate 25 made of plastic for damping is provided.
  • the baffle plate 25 lies on a connecting flange 11, the one with a container wall only indicated here 22 is screwed.
  • the connecting flange 11 is screwed to the housing 2.
  • Vent hole 6 In the cover 3, which forms an upper wall of the housing 2, there is one Vent hole 6 is arranged, preferably a silencer 10 is connected. This vent hole 6 is with an upper chamber 18 in which a coil spring 8 or another suitable spring element is arranged. The spring 8 is at one end on cover 3 and at the other end on one Percussion piston 5 supported.
  • the lid 3 is preferably on the Screwed on housing 2.
  • FIG. 1 shows the percussion piston 5 in the percussion position, in which it rests on the baffle plate 25.
  • a circumferential annular Room 7 At the front end of the piston 5 is a circumferential annular Room 7, which has a radial connection opening 12 of the Housing 2 is connected to a compressed air line 17. through a throttle valve 14, the pressure build-up and thus the Interval time can be set in a first branch line 34.
  • a second branch line 13 leads to a further connection opening 23, as can be seen at a distance from the flapper 25 extends radially in the housing 2.
  • This connection opening 23 is with a through a passage 24 of the percussion piston 5 Space 20 connected within a control piston 4, which is a control element forms.
  • This control piston 4 is in a bore 26 of a first piston part 5a axially displaceably supported and sealed with sealing rings 27 with respect to the bore 26. Sealing elements 21 arranged on the front seal in 1 shows the control piston 4 against a wall 28 of the Percussion piston 5. A passage 9 is in the center of the wall 28 arranged, which is closed in Figure 1 by the control piston 4.
  • the control piston 4 can also be controlled by another control element, for example, a membrane can be replaced.
  • the control piston 4 however, it is characterized by its particular durability.
  • the percussion piston 5 consists of a first piston part 5a and a second piston part 5b. These two piston parts 5a and 5b are firmly connected. Opposite an inside 29 of the housing 2 is the percussion piston 5 by means of sealing grooves 19 sealed. At least one axially runs in the percussion piston 5 Ventilation duct 16, which at one end with the upper chamber 18 and is connected at the other end to an annular space 30. According to FIG. 1, the space 30 is opposed by the control piston 4 the passage 9 closed.
  • the percussion piston 5 can act against the retroactive force of the spring 8 be lifted from the baffle plate 25 by the first Branch line 34 compressed air introduced into the lower chamber 7 becomes.
  • the connection bore 23 and via the passage 24 compressed air in initiated the room 20 via the second branch line 13, the connection bore 23 and via the passage 24 compressed air in initiated the room 20.
  • the throttle valve 14 is now set so that the compressed air enters chamber 7 more slowly than flows into the chamber 20. This creates this pressure in the chamber 20 larger than in chamber 7 and thus valve 14 closed. This ensures that the control piston 4 abuts the wall 28 and the passage 9 is closed remains.
  • the pressure in the chamber 7 is chosen so that the Percussion piston 5 raised against the retroactive force of the spring 8 becomes.
  • the passage 9 remains closed.
  • the passage 9 is when the control piston is lifted off 4 connected to the air duct 16.
  • the air duct 16 Are in the percussion piston 5 several such air channels 16 are present, so are all Air channels 16 connected to the passage 9.
  • the lower chamber 7 is thus via the passage 9, the at least one air duct 16 and connected via the ventilation hole 6 with ambient air.
  • vent hole 15b is closed and the bore 15a by removing a closure member 33, for example an Allen screw opened.
  • the vent holes 15c and 15d remain closed. Should the blow power, however, will be reduced, so the vent hole Opened 15c or 15d and the corresponding other Vent hole 15a or 15b closed.
  • four vent holes 15a to 15d are provided. Of course, more or less ventilation holes can also be made be provided. These are about as shown arranged in the middle of the housing 2. It is also conceivable a version with an infinitely adjustable ventilation opening. It is important here that the spring 8 is not changed must be, as was usual.
  • the percussion piston 5 is located in the one shown in FIG Position, so in the lower chamber 7 and in the chamber 20th a pressure built up.
  • the percussion piston 5 is thus automatic raised again, the passage 9 being closed by the control piston 4 is held.
  • the stroke cycle mentioned above begins thus again and is repeated automatically until the pressure is interrupted in the compressed air line 17.
  • the percussion piston 5 then returns to the position shown in Figure 1.

Abstract

The pneumatic impact device (1) has an impact piston (5), displaced axially within a housing (2), in the direction of its upper wall (3), against the force of a return spring (8), via compressed air, with rapid venting of the chamber (7) below the impact piston upon reaching a given stroke via a control element (4) within the impact piston, which opens an air channel (16). the latter is closed by movement of the impact piston into its lower position.

Description

Die Erfindung betrifft einen pneumatisch arbeitenden Klopfer, beispielsweise für das Abklopfen von Behälterwandungen, mit einem Gehäuse, in dem ein Schlagkolben gelagert ist, der mit Druckluft gegen die rückwirkende Kraft einer Feder gegen eine Oberwand des Gehäuses bewegbar ist, welche Feder in einer oberen Kammer angeordnet ist, die eine Entlüftungsbohrung besitzt und mit wenigstens einem Luftkanal, durch den eine unter dem Kolben angeordnete untere Kammer entlüftet wird, wenn der Schlagkolben einen vorbestimmten Hub ausgeführt hat.The invention relates to a pneumatic knocker, for example for tapping container walls, with a Housing in which a percussion piston is mounted, with Compressed air against the retroactive force of a spring against one Upper wall of the housing is movable, which spring in an upper Chamber is arranged, which has a vent hole and with at least one air duct through which one under the piston arranged lower chamber is vented when the percussion piston has performed a predetermined stroke.

Pneumatisch arbeitende Klopfer der genannten Art sind seit langem bekannt. Beispielsweise offenbart die DE 25 49 551 A einen pneumatisch arbeitenden Klopfer, der insbesondere für das Abklopfen von staubförmigem Material von Behälterwandungen vorgesehen ist. Dieser weist ein Zylinderrohr auf, in dem ein Schlagkolben gelagert ist. Das Zylinderrohr ist an einem Ende mit einem Deckel und an einem anderen Ende mit einer Prallplatte verschlossen. Der Schlagkolben wird gegen die rückwirkende Kraft der Feder angehoben und nach der Umstellung eines Ventils gegen die Prallplatte bewegt.Pneumatic knockers of the type mentioned have been around for a long time known. For example, DE 25 49 551 A discloses one pneumatically working knocker, especially for knocking of dusty material provided by container walls is. This has a cylinder tube in which a percussion piston is stored. The cylinder tube is at one end with one Cover and closed at another end with a baffle plate. The percussion piston is against the retroactive force the spring raised and after changing a valve against the baffle moves.

Ein weiterer pneumatischer Klopfer dieser Art ist aus der EP 0 345 484 bekannt geworden. Bei diesem ist in einer Gehäuseseitenwand eine Steuerbohrung vorgesehen. Diese Steuerbohrung ist über eine Steuerleitung mit einem 3/2-Wegeluftventil in Verbindung. Dieses Ventil ist zudem mit einem Anschlussloch in der Ventilwandung verbunden. Damit soll eine automatische Taktsteuerung der Kolbenschläge ohne mechanische, mit dem Kolben zusammenwirkende Teile möglich sein. Nachteilig ist bei diesem Klopfer jedoch die vergleichsweise aufwändige Herstellung und Montage.Another pneumatic knocker of this type is from the EP 0 345 484 has become known. This is in a side wall of the housing a control hole is provided. This control hole is connected to a 3/2-way air valve via a control line. This valve is also with a connection hole in the Valve wall connected. This is supposed to be an automatic clock control the piston strokes without mechanical interaction with the piston Parts may be possible. The disadvantage of this knocker however, the comparatively complex manufacture and Assembly.

Die Erfinder haben sich die Aufgabe gestellt, einen pneumatisch arbeitenden Klopfer der genannten Gattung zu schaffen, der kostengünstiger herstellbar und einfacher montierbar ist. Der Klopfer soll trotzdem funktionssicher sein.The inventors set themselves the task of pneumatically to create working knockers of the type mentioned, the more cost-effective is manufacturable and easier to assemble. The knocker should still be reliable.

Die Aufgabe ist bei einem pneumatisch arbeitenden Klopfer der genannten Gattung dadurch gelöst, dass im Schlagkolben ein Steuerelement angeordnet ist, das zur Schnellentlüftung der unteren Kammer bei einem vorbestimmten Hub des Schlagkolbens den genannten Luftkanal freigibt und diesen bei Rückführung des Schlagkolbens in die untere Schlagposition wieder schliesst.The task is for a pneumatic knocker mentioned type solved in that a control element in the percussion piston is arranged, for quick ventilation of the lower Chamber at a predetermined stroke of the percussion piston Air channel releases and this when returning the percussion piston closes in the lower striking position.

Beim erfindungsgemässen Klopfer sind insbesondere ein 3/2-Wegeluftventil und entsprechende Steuerleitungen nicht erforderlich. Die Umsteuerung erfolgt mit dem im Schlagkolben angeordneten Steuerelement, was eine einfache und insbesondere sehr kompakte Konstruktion ermöglicht. Eine besonders betriebssichere und dauerhafte Ausführung ist dann gewährleistet, wenn das Steuerelement als Steuerkolben ausgebildet ist.In the knocker according to the invention there are in particular a 3/2-way air valve and corresponding control lines are not required. The reversal takes place with the one arranged in the percussion piston Control what a simple and particular enables very compact construction. A particularly reliable and permanent execution is guaranteed if the control element is designed as a control piston.

Eine besonders einfache und kompakte Ausführung ergibt sich dann, wenn gemäss einer Weiterbildung der Erfindung der Luftkanal zur Schnellentlüftung der unteren Kammer im Kolben angeordnet ist. Auf eine aussenseitig angeordnete Luftleitung kann in diesem Fall verzichtet werden. A particularly simple and compact design results when, according to a further development of the invention, the air duct arranged for quick ventilation of the lower chamber in the piston is. On an outside air line arranged in be waived in this case.

Nach einer Weiterbildung der Erfindung ist vorgesehen, dass über dem Steuerkolben ein Druckraum angeordnet ist und der Steuerkolben in eine Schliessstellung bringbar ist, in welcher der Druckraum mit einer Druckleitung verbunden ist. Durch Entlüftung des Druckraumes kann dann der Steuerkolben angehoben und der Luftkanal zur Schnellentlüftung freigegeben werden. Das Entlüften des Druckraumes erfolgt gemäss einer Weiterbildung der Erfindung durch ein Entlüftungsloch in dem Kolbengehäuse. Vorzugsweise sind mehrere solche Entlüftungslöcher vorgesehen, wobei jeweils ausser einem Entlüftungsloch alle geschlossen sind. Die Entlüftungslöcher befinden sich in unterschiedlichen Hubhöhen und entsprechen damit unterschiedlichen Schlagkräften. Durch Verschliessen bzw. Öffnen eines Entlüftungsloches kann damit die Schlagkraft in einfacher Weise geändert und damit an die jeweiligen Anforderungen angepasst werden. Die Feder, welche den Schlagkolben belastet, muss hierbei nicht ausgewechselt werden.According to a development of the invention, it is provided that a pressure chamber is arranged in the control piston and the control piston can be brought into a closed position in which the pressure chamber is connected to a pressure line. By venting the Pressure chamber can then lift the control piston and the air duct be released for quick ventilation. Bleeding the Pressure space takes place according to a development of the invention through a vent hole in the piston housing. Preferably several such vent holes are provided, each except for one vent hole, all are closed. The vent holes are in different lifting heights and correspond thus different clout forces. By closing or opening a vent hole can Power changed in a simple way and thus to the respective Requirements are adjusted. The feather that the Percussion piston loaded, does not have to be replaced here.

Weitere vorteilhafte Merkmale ergeben sich aus den abhängigen Patentansprüchen, der nachfolgenden Beschreibung sowie der Zeichnung.Further advantageous features result from the dependent ones Claims, the following description and the Drawing.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Es zeigen:

Figur 1
schematisch ein Schnitt durch einen erfindungsgemässen Klopfer und
Figur 2
ein Schnitt durch den Klopfer gemäss Figur 1, wobei der Schlagkolben angehoben ist.
An embodiment of the invention is explained below with reference to the drawing. Show it:
Figure 1
schematically shows a section through a knocker according to the invention and
Figure 2
a section through the knocker according to Figure 1, wherein the percussion piston is raised.

Die Figur 1 zeigt einen Klopfer 1, der ein zylindrisches Gehäuse 2 besitzt, das an einem Ende mit einem Deckel 3 und am anderen Ende mit einer Prallplatte 25 aus Kunststoff zur Dämpfung versehen ist. Die Prallplatte 25 liegt an einem Anschlussflansch 11 an, der mit einer hier lediglich angedeuteten Behälterwandung 22 verschraubt ist. Mit dem Klopfer 1 kann mit kräftigen Schlägen gegen die Behälterwand 22 ein hier nicht gezeigtes gelöstes Material gelockert und zum Ausfliessen gebracht werden. Der Anschlussflansch 11 ist mit dem Gehäuse 2 verschraubt.Figure 1 shows a knocker 1, which is a cylindrical housing 2 has a lid 3 at one end and the other End with a baffle plate 25 made of plastic for damping is provided. The baffle plate 25 lies on a connecting flange 11, the one with a container wall only indicated here 22 is screwed. With the knocker 1 can with strong Impacts against the container wall 22 a not shown here loosened material and let it flow out become. The connecting flange 11 is screwed to the housing 2.

Im Deckel 3, der eine Oberwand des Gehäuses 2 bildet, ist eine Entlüftungsbohrung 6 angeordnet, an die vorzugsweise ein Schalldämpfer 10 angeschlossen ist. Diese Entlüftungsbohrung 6 ist mit einer oberen Kammer 18 verbunden, in der eine Spiralfeder 8 oder ein anderes geeignetes Federelement angeordnet ist. Die Feder 8 ist an einem Ende am Deckel 3 und am anderen Ende an einem Schlagkolben 5 abgestützt. Der Deckel 3 ist vorzugsweise auf das Gehäuse 2 aufgeschraubt.In the cover 3, which forms an upper wall of the housing 2, there is one Vent hole 6 is arranged, preferably a silencer 10 is connected. This vent hole 6 is with an upper chamber 18 in which a coil spring 8 or another suitable spring element is arranged. The spring 8 is at one end on cover 3 and at the other end on one Percussion piston 5 supported. The lid 3 is preferably on the Screwed on housing 2.

In der Figur 1 ist der Schlagkolben 5 in der Schlagposition gezeigt, in welcher dieser auf der Prallplatte 25 aufliegt. Am vorderen Ende des Kolbens 5 befindet sich ein umlaufender ringförmiger Raum 7, der über eine radiale Anschlussöffnung 12 des Gehäuses 2 mit einer Druckluftleitung 17 verbunden ist. Mittels eines Drosselventils 14 kann der Druckaufbau und damit die Intervallzeit in einer ersten Zweigleitung 34 eingestellt werden. Eine zweite Zweigleitung 13 führt zu einer weiteren Anschlussöffnung 23, die wie ersichtlich im Abstand zur Prallplatte 25 radial im Gehäuse 2 verläuft. Diese Anschlussöffnung 23 ist über einen Durchgang 24 des Schlagkolbens 5 mit einem Raum 20 innerhalb eines Steuerkolbens 4 verbunden, der ein Steuerelement bildet. Dieser Steuerkolben 4 ist in einer Bohrung 26 eines ersten Kolbenteils 5a achsial begrenzt verschieblich gelagert und mit Dichtungsringen 27 gegenüber der Bohrung 26 abgedichtet. Frontseitig angeordnete Dichtungselemente 21 dichten in Figur 1 den Steuerkolben 4 gegenüber einer Wandung 28 des Schlagkolbens 5 ab. Mittig in der Wandung 28 ist ein Durchgang 9 angeordnet, der in Figur 1 vom Steuerkolben 4 verschlossen ist. Der Steuerkolben 4 kann auch durch ein anderes Steuerelement, beispielsweise eine Membran ersetzt sein. Der Steuerkolben 4 zeichnet sich jedoch durch besondere Dauerhaftigkeit aus.1 shows the percussion piston 5 in the percussion position, in which it rests on the baffle plate 25. At the front end of the piston 5 is a circumferential annular Room 7, which has a radial connection opening 12 of the Housing 2 is connected to a compressed air line 17. through a throttle valve 14, the pressure build-up and thus the Interval time can be set in a first branch line 34. A second branch line 13 leads to a further connection opening 23, as can be seen at a distance from the flapper 25 extends radially in the housing 2. This connection opening 23 is with a through a passage 24 of the percussion piston 5 Space 20 connected within a control piston 4, which is a control element forms. This control piston 4 is in a bore 26 of a first piston part 5a axially displaceably supported and sealed with sealing rings 27 with respect to the bore 26. Sealing elements 21 arranged on the front seal in 1 shows the control piston 4 against a wall 28 of the Percussion piston 5. A passage 9 is in the center of the wall 28 arranged, which is closed in Figure 1 by the control piston 4. The control piston 4 can also be controlled by another control element, for example, a membrane can be replaced. The control piston 4 however, it is characterized by its particular durability.

Der Schlagkolben 5 besteht aus einem ersten Kolbenteil 5a sowie einem zweiten Kolbenteil 5b. Diese beiden Kolbenteile 5a und 5b sind fest miteinander verbunden. Gegenüber einer Innenseite 29 des Gehäuses 2 ist der Schlagkolben 5 mittels Dichtungsnuten 19 abgedichtet. Im Schlagkolben 5 verläuft achsial wenigstens ein Lüftungskanal 16, der an einem Ende mit der oberen Kammer 18 und am anderen Ende mit einem ringförmigen Raum 30 verbunden ist. Der Raum 30 ist gemäss Figur 1 durch den Steuerkolben 4 gegenüber dem Durchgang 9 verschlossen.The percussion piston 5 consists of a first piston part 5a and a second piston part 5b. These two piston parts 5a and 5b are firmly connected. Opposite an inside 29 of the housing 2 is the percussion piston 5 by means of sealing grooves 19 sealed. At least one axially runs in the percussion piston 5 Ventilation duct 16, which at one end with the upper chamber 18 and is connected at the other end to an annular space 30. According to FIG. 1, the space 30 is opposed by the control piston 4 the passage 9 closed.

Der Schlagkolben 5 kann gegen die rückwirkende Kraft der Feder 8 von der Prallplatte 25 angehoben werden, indem über die erste Zweigleitung 34 Druckluft in die untere Kammer 7 eingeleitet wird. Hierbei wird gleichzeitig über die zweite Zweigleitung 13, die Anschlussbohrung 23 sowie über den Durchgang 24 Druckluft in den Raum 20 eingeleitet. Das Drosselventil 14 ist nun so eingestellt, dass hierbei die Druckluft langsamer in die Kammer 7 als in die Kammer 20 einströmt. Dadurch ist dieser Druck in der Kammer 20 grösser als in der Kammer 7 und damit das Ventil 14 verschlossen. Dadurch ist sichergestellt, dass der Steuerkolben 4 dicht an der Wandung 28 anliegt und der Durchgang 9 verschlossen bleibt. Der Druck in der Kammer 7 ist so gewählt, dass der Schlagkolben 5 gegen die rückwirkende Kraft der Feder 8 angehoben wird. Der Durchgang 9 bleibt hierbei verschlossen. Der Druck in der Kammer 20 bleibt erhalten, bis der Durchgang 24 eine offene Entlüftungsbohrung 15b erreicht, welche radial die Wandung 2 durchdringt. Der Druck in der Kammer 20 fällt damit auf den Umgebungsdruck. Der erhöhte Druck in der Kammer 7 bleibt jedoch erhalten, sodass der Steuerkolben 4 sofort von der Wandung 28 abgehoben wird.The percussion piston 5 can act against the retroactive force of the spring 8 be lifted from the baffle plate 25 by the first Branch line 34 compressed air introduced into the lower chamber 7 becomes. Here, via the second branch line 13, the connection bore 23 and via the passage 24 compressed air in initiated the room 20. The throttle valve 14 is now set so that the compressed air enters chamber 7 more slowly than flows into the chamber 20. This creates this pressure in the chamber 20 larger than in chamber 7 and thus valve 14 closed. This ensures that the control piston 4 abuts the wall 28 and the passage 9 is closed remains. The pressure in the chamber 7 is chosen so that the Percussion piston 5 raised against the retroactive force of the spring 8 becomes. The passage 9 remains closed. The pressure remains in chamber 20 until passage 24 is open Vent hole 15b, which radially reaches the wall 2 penetrates. The pressure in the chamber 20 is thus noticeable the ambient pressure. However, the increased pressure in chamber 7 remains received so that the control piston 4 immediately off the wall 28 is lifted off.

Wie die Figur 2 zeigt, ist der Durchgang 9 bei abgehobenem Steuerkolben 4 mit dem Luftkanal 16 verbunden. Sind im Schlagkolben 5 mehrere solche Luftkanäle 16 vorhanden, so sind sämtliche Luftkanäle 16 mit dem Durchgang 9 verbunden. Die untere Kammer 7 ist damit über den Durchgang 9, den wenigstens einen Luftkanal 16 und über die Entlüftungsbohrung 6 mit Umgebungsluft verbunden.As FIG. 2 shows, the passage 9 is when the control piston is lifted off 4 connected to the air duct 16. Are in the percussion piston 5 several such air channels 16 are present, so are all Air channels 16 connected to the passage 9. The lower chamber 7 is thus via the passage 9, the at least one air duct 16 and connected via the ventilation hole 6 with ambient air.

Damit sinkt sofort der Druck in der unteren Kammer 7 und entsprechend nimmt der Druck auf die Unterseite des Schlagkolbens 5 ab. Die Kraft der Feder 8 auf den Schlagkolben 5 überwiegt damit die Kraft der Druckluft auf den Schlagkolben 5 und dieser bewegt sich damit nach unten und schlägt auf der Prallplatte 25 auf. Die aus der Kammer 7 verdrängte Luft gelangt gemäss den Pfeilen 31 und 32 durch den Durchgang 9 in den Luftkanal 16 und durch die Entlüftungsbohrung 6, in den Schalldämpfer und schliesslich in die Umgebungsluft. Der Schlag auf die Prallplatte 25 wird auf den Anschlussflansch 11 und von diesem auf die Behälterwandung 22 übertragen.This immediately reduces the pressure in the lower chamber 7 and accordingly the pressure on the underside of the percussion piston 5 from. The force of the spring 8 on the percussion piston 5 thus predominates the force of the compressed air on the percussion piston 5 and this moves down and strikes the flapper 25. The air displaced from the chamber 7 arrives according to the arrows 31 and 32 through the passage 9 into the air duct 16 and through the vent hole 6, in the silencer and finally into the ambient air. The impact on the flapper 25 is on the connecting flange 11 and from this to the container wall 22 transferred.

Der Schlagkolben 5 wird somit angehoben, bis der Durchgang 24 die offene Entlüftungsöffnung 15b erreicht hat. Ist ein grösserer Hub des Schlagkolbens 5 und entsprechend ein stärkerer Schlag gewünscht, so wird die Entlüftungsbohrung 15b verschlossen und die Bohrung 15a durch Entfernen eines Verschlusselementes 33, beispielsweise einer Inbusschraube geöffnet. Die Entlüftungsbohrungen 15c und 15d bleiben weiterhin verschlossen. Soll die Schlagkraft hingegen vermindert werden, so wird die Entlüftungsbohrung 15c oder 15d geöffnet und die entsprechende andere Entlüftungsbohrung 15a bzw. 15b geschlossen. Im gezeigten Ausführungsbeispiel sind vier Entlüftungsbohrungen 15a bis 15d vorgesehen. Selbstverständlich können auch mehr oder weniger Entlüftungsbohrungen vorgesehen sein. Diese sind wie gezeigt etwa in mittlerer Höhe des Gehäuses 2 angeordnet. Denkbar ist auch eine Ausführung mit einer stufenlos verstellbaren Entlüftungsöffnung. Wesentlich ist hierbei, dass die Feder 8 nicht gewechselt werden muss, wie dies üblich war.The percussion piston 5 is thus raised until the passage 24 has reached the open vent opening 15b. Is a bigger one Stroke of the percussion piston 5 and accordingly a stronger one Blow desired, the vent hole 15b is closed and the bore 15a by removing a closure member 33, for example an Allen screw opened. The vent holes 15c and 15d remain closed. Should the blow power, however, will be reduced, so the vent hole Opened 15c or 15d and the corresponding other Vent hole 15a or 15b closed. In the embodiment shown four vent holes 15a to 15d are provided. Of course, more or less ventilation holes can also be made be provided. These are about as shown arranged in the middle of the housing 2. It is also conceivable a version with an infinitely adjustable ventilation opening. It is important here that the spring 8 is not changed must be, as was usual.

Befindet sich der Schlagkolben 5 in der in Figur 1 gezeigten Stellung, so wird in der unteren Kammer 7 sowie in der Kammer 20 ein Druck aufgebaut. Der Schlagkolben 5 wird damit selbsttätig wieder angehoben, wobei der Durchgang 9 vom Steuerkolben 4 verschlossen gehalten wird. Der oben erwähnte Schlagzyklus beginnt damit von neuem und wird selbsttätig wiederholt, bis der Druck in der Druckluftleitung 17 unterbrochen wird. Der Schlagkolben 5 kehrt dann in die in Figur 1 gezeigte Position zurück.The percussion piston 5 is located in the one shown in FIG Position, so in the lower chamber 7 and in the chamber 20th a pressure built up. The percussion piston 5 is thus automatic raised again, the passage 9 being closed by the control piston 4 is held. The stroke cycle mentioned above begins thus again and is repeated automatically until the pressure is interrupted in the compressed air line 17. The percussion piston 5 then returns to the position shown in Figure 1.

Claims (9)

Pneumatisch arbeitender Klopfer, beispielsweise für das Abklopfen von Behälterwandungen (22), mit einem Gehäuse (2), in dem ein Schlagkolben (5) gelagert ist, der mit Druckluft gegen die rückwirkende Kraft einer Feder (8) gegen eine Oberwand (3) des Gehäuses (2) bewegbar ist, welche Feder (8) in einer oberen Kammer (18) angeordnet ist, die eine Entlüftungsbohrung (6) besitzt und mit wenigstens einem Luftkanal (16), durch den eine unter dem Schlagkolben (5) angeordnete Kammer (7) entlüftet wird, wenn der Schlagkolben (5) einen vorbestimmten Hub ausführt, dadurch gekennzeichnet, dass im Schlagkolben (5) ein Steuerelement (4) angeordnet ist, das zur Schnellentlüftung der unteren Kammer (7) bei einem vorbestimmten Hub des Schlagkolbens (5) den genannten Luftkanal (16) freigibt und diesen bei der Rückführung des Schlagkolbens (5) in eine untere Schlagposition wieder schliesst.Pneumatically operating knocker, for example for tapping container walls (22), with a housing (2) in which a percussion piston (5) is mounted, which with compressed air against the retroactive force of a spring (8) against an upper wall (3) of the Housing (2) is movable, which spring (8) is arranged in an upper chamber (18) which has a vent hole (6) and with at least one air duct (16) through which a chamber (5) arranged under the percussion piston (5) 7) is vented when the percussion piston (5) executes a predetermined stroke, characterized in that a control element (4) is arranged in the percussion piston (5), which for quick ventilation of the lower chamber (7) at a predetermined stroke of the percussion piston (5 ) releases said air channel (16) and closes it again when the percussion piston (5) is returned to a lower percussion position. Klopfer nach Anspruch 1, dadurch gekennzeichnet, dass das Steuerelement (4) als Steuerkolben ausgebildet ist.Knocker according to claim 1, characterized in that the control element (4) is designed as a control piston. Klopfer nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Luftkanal (16) im Schlagkolben (5) angeordnet ist.Knocker according to claim 1 or 2, characterized in that the air channel (16) is arranged in the percussion piston (5). Klopfer nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass über dem Steuerkolben (4) ein Druckraum (20) angeordnet ist und der Steuerkolben (4) in eine Schliessstellung bringbar ist, in welchem ein Durchgang (9) zwischen der genannten un teren Kammer (7) und einer Kammer (30) des Schlagkolbens (5) verschlossen ist. Knocker according to claim 2 or 3, characterized in that a pressure chamber (20) is arranged above the control piston (4) and the control piston (4) can be brought into a closed position in which a passage (9) between the said lower chamber ( 7) and a chamber (30) of the percussion piston (5) is closed. Klopfer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Gehäuse (2) eine Anschlussöffnung (12) aufweist, welche die genannte untere Kammer (7) mit einer Druckleitung (17) verbindet.Knocker according to one of claims 1 to 4, characterized in that the housing (2) has a connection opening (12) which connects said lower chamber (7) to a pressure line (17). Klopfer nach Anspruch 5, dadurch gekennzeichnet, dass das Gehäuse (2) eine weitere Anschlussöffnung (23) aufweist, welche eine Zweigleitung (13) der Druckluftleitung (17) mit einer Kammer (20) des Steuerkolbens (4) verbindet.Knocker according to claim 5, characterized in that the housing (2) has a further connection opening (23) which connects a branch line (13) of the compressed air line (17) to a chamber (20) of the control piston (4). Klopfer nach Anspruch 6, dadurch gekennzeichnet, dass ein Drosselventil (14) vorgesehen ist, mit welchem der Druckaufbau in der unteren Kammer (7) einstellbar ist.Knocker according to claim 6, characterized in that a throttle valve (14) is provided with which the pressure build-up in the lower chamber (7) is adjustable. Klopfer nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass mehrere Entlüftungsbohrungen (15a bis 15d) vorgesehen sind, die in unterschiedlichen Hubhöhen mit einer Druckkammer (20) des Steuerkolbens (4) verbindbar sind.Knocker according to one of claims 1 to 7, characterized in that a plurality of ventilation bores (15a to 15d) are provided which can be connected at different stroke heights to a pressure chamber (20) of the control piston (4). Klopfer nach einem der Ansprüche 2 bis 8, dadurch gekennzeichnet, dass der Steuerkolben (4) stirnseitig ein Dichtungsmittel (21) aufweist, das in einer Schliessstellung an einer Wandung (28) des Schlagkolbens (5) anliegt und damit ein Durchgang (9) verschlossen wird.Knocker according to one of claims 2 to 8, characterized in that the control piston (4) has on the end face a sealing means (21) which, in a closed position, bears against a wall (28) of the percussion piston (5) and thus closes a passage (9) becomes.
EP04405024A 2003-01-28 2004-01-12 Pneumatic knocker Expired - Lifetime EP1442999B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1172003 2003-01-28
CH1172003 2003-01-28

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EP1442999A1 true EP1442999A1 (en) 2004-08-04
EP1442999B1 EP1442999B1 (en) 2006-03-29

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EP (1) EP1442999B1 (en)
AT (1) ATE321709T1 (en)
DE (1) DE502004000403D1 (en)
DK (1) DK1442999T3 (en)
ES (1) ES2259437T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1731271A1 (en) * 2005-06-09 2006-12-13 Netter Gmbh Pneumatic knocker and method of operating a pneumatic knocker
CN104724411A (en) * 2015-03-29 2015-06-24 浙江东立绿源科技股份有限公司 Vibrating hopper for feed production
WO2020185076A1 (en) 2019-03-12 2020-09-17 Moba Group B.V. Method and apparatus for cleaning a stack of objects

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2861548A (en) * 1957-02-20 1958-11-25 Burgess Vibrator
FR1433406A (en) * 1964-02-06 1966-04-01 Vibrating device with control valves
DE1703061A1 (en) * 1968-03-27 1972-04-13 Krupp Gmbh Hydraulically operated linear motor
DE2549551A1 (en) 1975-11-05 1977-05-18 Netter Fa J Pneumatic hammer freeing powder material from container wall - comprises sprung cylinder compressed by air supply and released by valve to hit external wall
EP0345484A2 (en) 1988-06-04 1989-12-13 Netter Gmbh Knocker with self-control
US5683230A (en) * 1993-03-25 1997-11-04 Karppinen; Reijo Pressure medium driven device performing linear motion

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2861548A (en) * 1957-02-20 1958-11-25 Burgess Vibrator
FR1433406A (en) * 1964-02-06 1966-04-01 Vibrating device with control valves
DE1703061A1 (en) * 1968-03-27 1972-04-13 Krupp Gmbh Hydraulically operated linear motor
DE2549551A1 (en) 1975-11-05 1977-05-18 Netter Fa J Pneumatic hammer freeing powder material from container wall - comprises sprung cylinder compressed by air supply and released by valve to hit external wall
EP0345484A2 (en) 1988-06-04 1989-12-13 Netter Gmbh Knocker with self-control
US5683230A (en) * 1993-03-25 1997-11-04 Karppinen; Reijo Pressure medium driven device performing linear motion

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1731271A1 (en) * 2005-06-09 2006-12-13 Netter Gmbh Pneumatic knocker and method of operating a pneumatic knocker
EP1731272A2 (en) * 2005-06-09 2006-12-13 Netter Gmbh Pneumatic knocker and method of operating a pneumatic knocker
EP1731272A3 (en) * 2005-06-09 2007-11-14 Netter Gmbh Pneumatic knocker and method of operating a pneumatic knocker
US7607490B2 (en) 2005-06-09 2009-10-27 Netter Gmbh Pneumatic impact tool and method
CN104724411A (en) * 2015-03-29 2015-06-24 浙江东立绿源科技股份有限公司 Vibrating hopper for feed production
WO2020185076A1 (en) 2019-03-12 2020-09-17 Moba Group B.V. Method and apparatus for cleaning a stack of objects

Also Published As

Publication number Publication date
DE502004000403D1 (en) 2006-05-18
EP1442999B1 (en) 2006-03-29
ES2259437T3 (en) 2006-10-01
DK1442999T3 (en) 2006-08-07
ATE321709T1 (en) 2006-04-15

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