EP0065117B1 - Automatically closing tap - Google Patents

Automatically closing tap Download PDF

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Publication number
EP0065117B1
EP0065117B1 EP82103361A EP82103361A EP0065117B1 EP 0065117 B1 EP0065117 B1 EP 0065117B1 EP 82103361 A EP82103361 A EP 82103361A EP 82103361 A EP82103361 A EP 82103361A EP 0065117 B1 EP0065117 B1 EP 0065117B1
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EP
European Patent Office
Prior art keywords
pressure
valve
pressure channel
liquid
nozzle
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Expired
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EP82103361A
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German (de)
French (fr)
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EP0065117A2 (en
EP0065117A3 (en
Inventor
Helmut Dr. Ing. Romberg
Horst Koerner
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BASF SE
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BASF SE
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/42—Filling nozzles
    • B67D7/44—Filling nozzles automatically closing
    • B67D7/46—Filling nozzles automatically closing when liquid in container to be filled reaches a predetermined level
    • B67D7/465—Electrical probes sensing the level of the liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
    • B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
    • B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
    • B67C3/22—Details
    • B67C3/28—Flow-control devices, e.g. using valves

Definitions

  • the invention relates to a tap for filling liquids into containers with automatic termination of the pin after filling, consisting of a valve body which is equipped with an inlet and an outlet connection, a valve arranged in the valve body and actuable by means of a trigger lever, loaded in the closing direction to control the flow of liquid from the inlet to the outlet, a switching device arranged in the valve body, which is controlled by the pressure prevailing at the mouth of the outlet port and contains a drive element acted upon by the working pressure, which, with a spring-loaded valve located between the trigger lever and the valve, holds the valve in the open position locking coupling element is coupled, which can be moved by the drive member into a position releasing the valve.
  • DE-OS 2641 049 describes a filling device which essentially consists of a manually operable flow valve and a vacuum-controlled closing device, by means of which the valve is closed automatically when the container or tank is filled.
  • the closing device has a membrane which closes a pressure chamber and which is exposed on the chamber side via a pressure channel to the negative pressure generated by the liquid flow in the valve, while on the other side it is coupled to an element releasably connecting the trigger lever and the valve under spring tension.
  • Another pressure channel leads from the pressure chamber to the mouth of the filler neck.
  • a tap of the type mentioned contains a working cylinder, the piston of which is connected to a spring-loaded connecting element which locks the flow valve in the open position.
  • the working cylinder is connected on the one hand to a supply line for compressed air and on the other hand to a pressure channel which is led into the atmosphere via a valve arranged in the mouth area of the filler neck. This valve is closed by the filling medium when the fill level is reached, so that a pressure of the air flowing through the switching device builds up in the pressure channel and thus in the working cylinder, by means of which the piston is brought into the position which triggers the connecting element and thereby closes the flow valve.
  • the object underlying the invention is therefore to design the switching device of the tap so that, on the one hand, depending on the pressure prevailing at the mouth of the outlet nozzle, an arbitrarily selectable working pressure for reliable and quick triggering of the valve locked in the open position can be switched and, on the other hand, one of false triggers free tap operation is guaranteed.
  • the switching device has a pneumatic relay which is connected on the control pressure side to a pressure channel and on the working pressure side to the pneumatic drive member, and that the outlet port is designed as a double-walled tube, the annular space of which serves as a pressure channel connected to the pneumatic relay.
  • the drawing shows a tap, which consists of a valve body 1 with an inlet nozzle 2 and an outlet nozzle 3.
  • the inlet is for connecting a supply line, in particular a hose line, equipped with conventional devices 4.
  • the liquid flow from the inlet to the outlet port is controlled by a valve 5, the valve body 6 of which is pressed with its seal 7 by a compression spring 8 against the valve seat 9.
  • the valve body is connected to a trigger lever via a linkage 10 and joints 11.
  • the linkage consists of a guide tube 13 fastened to the valve body and a pull rod 14 which is connected to the trigger lever via the joints and which is displaceable in the guide tube.
  • the guide tube and tie rod are provided with congruent recesses 15 directed transversely to the longitudinal axis, into which two pins 16 are pressed as a connecting element by means of a drive element against a compression spring 17 so that the movements of the trigger lever are transmitted to the valve body.
  • the pins are fastened in a holder 18 which is also displaceable transversely to the longitudinal axis and is supported on the compression spring 17 resting in a recess 19 of the valve body 1.
  • the holder consists of a U-shaped part with bores in the U-legs for receiving the pins, the back of the part being connected to a membrane 21 which closes off a pressure chamber 20 and which together form the drive element for the displacement movements.
  • a pressure line 27 there is a connection between the pressure chamber and a pneumatic relay 22 as a switching element, the input of which is connected to a pressure channel 24 extending to the mouth 23 of the outlet connection 3.
  • a further tube 25 fastened to the valve body 1 is arranged concentrically around the outlet nozzle at a very short distance, approximately 0.1 mm, so that the annular space of the double-walled tube thus formed forms the pressure channel 24.
  • the membrane 21 is acted upon by compressed air from the relay 22 via the pressure line, so that the pins 16 are held against the spring 17 in the recesses 15 of the rod assembly 10. If the liquid level in the container to be filled exceeds the mouth 23 of the outlet nozzle 3, the air in the pressure channel 24 is slightly compressed by the liquid. As a result of the very small volume of the annular space forming the pressure channel and the tube capillary, a pressure increase is associated with this, which is sufficient to switch over the pneumatic relay 22. To increase this pressure increase, the annular gap at the mouth 23 is widened. After switching, the membrane 21 is no longer under pressure, so that the compression spring 17 acting on the holder 18 can push the pins 16 out of the recesses 15. The connection between the guide tube 13 and tension rod 14 is thereby released. The spring 8 acting on the valve body 6 can now press it onto the valve seat 9, after which the valve is in the closed position.
  • the relay 22 switches back due to the pressure drop.
  • the membrane is then again under pressure, so that the pins 16 are pressed against the linkage 10 and after pushing back the pull rod 14 by the trigger lever 12 in the closed position can snap back into the recesses 15.
  • the valve can then be operated again.
  • a development, not shown in the drawing, of the tap described above is that the pressure channel 24 via a lateral nipple and a connecting line to a gas pressure source, for. B. air or nitrogen is connected.
  • the gas flowing out at the mouth 23 of the outlet nozzle 3 in a very small amount keeps the annular gap free from any deposits, for example crystallization products, and from residues of the tap liquid. If the mouth is now immersed in the tap liquid, the flow resistance at the annular gap increases and thus the pressure in the pressure channel.
  • the pneumatic relay 22, which is expediently connected directly to the pressure system, for example by a bypass, responds to the pressure increase and causes the valve to close as already described.
  • the switching device 22, 21 brings the valve back into the actuatable state.
  • the exhaust air duct 37 is used to extract the solvent vapors released during filling.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)

Description

Die Erfindung betrifft einen Zapfhahn zum Einfüllen von Flüssigkeiten in Behälter mit automatischem Beenden des Zapfens nach deren Füllung, bestehend aus einem Hahnkörper, der mit einem Einlaß- und einem Auslaßstutzen ausgestattet ist, einem im Hahnkörper angeordeten und mittels eines Abzugshebels betätigbaren, in Schließrichtung belasteten Ventil zur Steuerung des Flüssigkeitsstromes vom Einlaß zum Auslaß, einer im Hahnkörper angeordneten Schalteinrichtung, die von dem an der Mündung des Auslaßstutzens herrschenden Druck gesteuert wird und ein vom Arbeitsdruck beaufschlagtes Antriebsorgan enthält, das mit einem zwischen Abzugshebel und Ventil befindlichen, federbelasteten, das Ventil in Offenstellung arretierenden Verbindungselement gekoppelt ist, das von dem Antriebsorgan in eine das Ventil freigebende Stellung bewegt werden kann.The invention relates to a tap for filling liquids into containers with automatic termination of the pin after filling, consisting of a valve body which is equipped with an inlet and an outlet connection, a valve arranged in the valve body and actuable by means of a trigger lever, loaded in the closing direction to control the flow of liquid from the inlet to the outlet, a switching device arranged in the valve body, which is controlled by the pressure prevailing at the mouth of the outlet port and contains a drive element acted upon by the working pressure, which, with a spring-loaded valve located between the trigger lever and the valve, holds the valve in the open position locking coupling element is coupled, which can be moved by the drive member into a position releasing the valve.

In der DE-OS 2641 049 ist eine Einfüllvorrichtung beschrieben, die im wesentlichen aus einem von Hand betätigbaren Durchflußventil und einer unterdruckgesteuerten Schließeinrichtung, durch die das Ventil selbsttätig geschlossen wird, wenn der Behälter oder Tank gefüllt ist, besteht. Die Schließeinrichtung weist eine Membran auf, die eine Druckkammer abschließt und die kammerseitig über einen Druckkanal dem durch die Flüssigkeitsströmung im Ventil erzeugten Unterdruck ausgesetzt ist, während sie auf der anderen Seite mit einem den Abzugshebel und das Ventil lösbar unter Federspannung verbindenden Element gekoppelt ist. Von der Druckkammer führt ein weiterer Druckkanal bis neben die Mündung des Einfüllstutzens. Dadurch wird der Unterdruck an der Membran erst wirksam, wenn der Flüssigkeitsspiegel im Behälter die Mündung und damit den Druckkanal verschließt. Die an der Membran angreifende Kraft des Unterdrucks überwindet die Federspannung, so daß das Verbindungselement aus der Arretierung gelöst wird. Der ebenfalls unter Federspannung stehende Ventilkörper geht dann in die Schließstellung.DE-OS 2641 049 describes a filling device which essentially consists of a manually operable flow valve and a vacuum-controlled closing device, by means of which the valve is closed automatically when the container or tank is filled. The closing device has a membrane which closes a pressure chamber and which is exposed on the chamber side via a pressure channel to the negative pressure generated by the liquid flow in the valve, while on the other side it is coupled to an element releasably connecting the trigger lever and the valve under spring tension. Another pressure channel leads from the pressure chamber to the mouth of the filler neck. As a result, the negative pressure on the membrane is only effective when the liquid level in the container closes the mouth and thus the pressure channel. The force of the negative pressure acting on the membrane overcomes the spring tension, so that the connecting element is released from the lock. The valve body, which is also under spring tension, then goes into the closed position.

Einrichtungen dieser Art arbeiten nur einwandfrei, wenn die zur Erzeugung eines ausreichenden Unterdrucks notwendige Strömungsgeschwindigkeit im Ventil relativ hoch ist. Für die bekannten Zapfpistolen an Tankstellen ist hierfür ein Benzindruck von etwa 4 bar vorgesehen. Zum Abfüllen explosiver bzw. leicht brennbarer Flüssigkeiten, wie Lösungsmittel, in Industriebetrieben sind hohe Strömungsgeschwindigkeiten wegen der damit verbundenen statischen Aufladung nicht zulässig. Die über den Druckkanal in die Flüssigkeit eingesaugte Luft stellt ebenfalls ein Sicherheitsrisiko dar. Ferner ist damit eine erhöhte, die Umwelt und das Bedienungspersonal belastende Lösungsmitteldampfemission verbunden.Devices of this type only work properly if the flow velocity in the valve required to generate a sufficient negative pressure is relatively high. For the known fuel nozzles at petrol stations, a gas pressure of approximately 4 bar is provided for this. For the filling of explosive or easily flammable liquids, such as solvents, in industrial plants, high flow rates are not permitted due to the associated static charge. The air sucked into the liquid via the pressure channel also represents a safety risk. It is also associated with an increased solvent vapor emission which is harmful to the environment and the operating personnel.

Aus der US-A-2 209 219 ist ein Zapfhahn der eingangs genannten Art bekannt, bei dem eine bei Erreichen des Füllstandes das Beenden des Zapfvorganges bewirkende Schalteinrichtung einen Arbeitszylinder enthält, dessen Kolben mit einem federbelasteten, das Durchflußventil in Offenstellung arretierenden Verbindungselement verbunden ist. Der Arbeitszylinder ist einerseits an eine Zuführungsleitung für Druckluft und andererseits an einen Druckkanal angeschlossen, der über ein im Mündungsbereich des Einfüllstutzens angeordnetes Ventil in die Atmosphäre geführt ist. Dieses Ventil wird bei Erreichen des Füllstandes vom Füllmedium geschlossen, so daß sich im Druckkanal und damit im Arbeitszylinder ein Druck der die Schalteinrichtung durchströmenden Luft aufbaut, durch den der Kolben in die das Verbindungselement auslösende und dadurch das Durchflußventil schließende Stellung gebracht wird.From US-A-2 209 219 a tap of the type mentioned is known, in which a switching device which causes the end of the tap operation when the fill level is reached contains a working cylinder, the piston of which is connected to a spring-loaded connecting element which locks the flow valve in the open position. The working cylinder is connected on the one hand to a supply line for compressed air and on the other hand to a pressure channel which is led into the atmosphere via a valve arranged in the mouth area of the filler neck. This valve is closed by the filling medium when the fill level is reached, so that a pressure of the air flowing through the switching device builds up in the pressure channel and thus in the working cylinder, by means of which the piston is brought into the position which triggers the connecting element and thereby closes the flow valve.

Die während des Zapfvorganges durch die vorstehend beschriebenen Leitungen und Einbauten strömende Luft muß in Druck und Volumenstrom genau eingestellt und konstant gehalten werden, um einerseits ein zuverlässiges und schnelles Auslösen des Zapfventils durch den Kolben zu gewährleisten und andererseits bei variierenden Strömungsverhältnissen ein Fehlauslösen infolge der Druckverluste in der langen, Strömungshindernisse aufweisenden Leitung zu vermeiden. Dies erschwert die Handhabung des Zapfhahns. Außerdem sind wegen der dadurch begrenzten Betriebsgrößen keine beliebigen Stellkräfte bei der Schalteinrichtung möglich. Ferner ist von Nachteil, daß der Füllstutzen wegen des Einbaus des Ventils für den Druckkanal im Mündungsbereich keine kleinen Baugrößen erlaubt.The air flowing through the lines and internals described above during the dispensing process must be precisely set and kept constant in pressure and volume flow in order to ensure reliable and rapid triggering of the dispensing valve by the piston and, on the other hand, false triggering due to pressure losses in varying flow conditions to avoid the long line with flow obstacles. This complicates the handling of the tap. In addition, because of the limited operating sizes, no arbitrary actuating forces are possible with the switching device. Another disadvantage is that the filler neck does not allow small sizes due to the installation of the valve for the pressure channel in the mouth area.

Die der Erfindung zugrundeliegende Aufgabe besteht daher darin, die Schalteinrichtung des Zapfhahns so auszubilden, daß einerseits in Abhängigkeit des an der Mündung des Auslaßstutzens herrschenden Druckes ein beliebig wählbarer Arbeitsdruck zum zuverlässigen und schnellen Auslösen des in der Offenstellung arretierten Ventils schaltbar ist und andererseits ein von Fehlauslösungen freier Zapfbetrieb gewährleistet ist.The object underlying the invention is therefore to design the switching device of the tap so that, on the one hand, depending on the pressure prevailing at the mouth of the outlet nozzle, an arbitrarily selectable working pressure for reliable and quick triggering of the valve locked in the open position can be switched and, on the other hand, one of false triggers free tap operation is guaranteed.

Die Lösung der Aufgabe besteht darin, daß die Schalteinrichtung ein pneumatisches Relais aufweist, welches steuerdruckseitig mit einem Druckkanal und arbeitsdruckseitig mit dem pneumatischen Antriebsorgan verbunden ist, und daß der Auslaßstutzen als Doppelmantelrohr ausgebildet ist, dessen Ringraum als mit dem pneumatischen Relais verbundener Druckkanal dient.The solution to the problem is that the switching device has a pneumatic relay which is connected on the control pressure side to a pressure channel and on the working pressure side to the pneumatic drive member, and that the outlet port is designed as a double-walled tube, the annular space of which serves as a pressure channel connected to the pneumatic relay.

Weitere Vorteile der Erfindung ergeben sich aus einem anhand der Zeichnung nachfolgend beschriebenen Ausführungsbeispiel.Further advantages of the invention result from an exemplary embodiment described below with reference to the drawing.

Die Zeichnung zeigt einen Zapfhahn, der aus einem Hahnkörper 1 mit einem Einlaßstutzen 2 und einem Auslaßstutzen 3 besteht. Der Einlaß ist zum Anschluß einer Zuleitung, insbesondere einer Schlauchleitung, mit üblichen Einrichtungen 4 ausgestattet. Der Flüssigkeitsstrom vom Einlaßzum Auslaßstutzen wird durch ein Ventil 5 gesteuert, dessen Ventilkörper 6 mit seiner Dichtung 7 durch eine Druckfeder 8 gegen den Ventilsitz 9 gedrückt wird. Zum Betätigen des Ventils ist der Ventilkörper über ein Gestänge 10 und Gelenke 11 mit einem Abzugshebel verbunden. Das Gestänge besteht aus einem am Ventilkörper befestigten Führungsrohr 13 und einem über die Gelenke mit dem Abzugshebel verbundenen Zugstab 14, der im Führungsrohr verschiebbar ist. Führungsrohr und Zugstab sind mit deckungsgleichen, quer zur Längsachse gerichteten Aussparungen 15 versehen, in die als Verbindungselement zwei Stifte 16 mittels eines Antriebsorgans gegen eine Druckfeder 17 gedrückt werden, so daß die Bewegungen des Abzugshebels auf den Ventilkörper übertragen werden. Die Stifte sind in einer Halterung 18 befestigt, die ebenfalls quer zur Längsachse verschiebbar und an der in einer Vertiefung 19 des Hahnkörpers 1 ruhenden Druckfeder 17 abgestützt ist. Die Halterung besteht aus einem U-förmigen Teil mit Bohrungen in den U-Schenkeln zur Aufnahme der Stifte, wobei der Rücken des Teils mit einer eine Druckkammer 20 abschließenden Membran 21, die zusammen das Antriebsorgan für die Verschiebebewegungen bilden, verbunden ist.The drawing shows a tap, which consists of a valve body 1 with an inlet nozzle 2 and an outlet nozzle 3. The inlet is for connecting a supply line, in particular a hose line, equipped with conventional devices 4. The liquid flow from the inlet to the outlet port is controlled by a valve 5, the valve body 6 of which is pressed with its seal 7 by a compression spring 8 against the valve seat 9. To operate the valve, the valve body is connected to a trigger lever via a linkage 10 and joints 11. The linkage consists of a guide tube 13 fastened to the valve body and a pull rod 14 which is connected to the trigger lever via the joints and which is displaceable in the guide tube. The guide tube and tie rod are provided with congruent recesses 15 directed transversely to the longitudinal axis, into which two pins 16 are pressed as a connecting element by means of a drive element against a compression spring 17 so that the movements of the trigger lever are transmitted to the valve body. The pins are fastened in a holder 18 which is also displaceable transversely to the longitudinal axis and is supported on the compression spring 17 resting in a recess 19 of the valve body 1. The holder consists of a U-shaped part with bores in the U-legs for receiving the pins, the back of the part being connected to a membrane 21 which closes off a pressure chamber 20 and which together form the drive element for the displacement movements.

Über eine Druckleitung 27 besteht eine Verbindung zwischen der Druckkammer und einem pneumatischen Relais 22 als Schaltorgan, dessen Eingang an einen bis zur Mündung 23 des Auslaßstutzens 3 reichenden Druckkanal 24 angeschlossen ist. Um den Auslaßstutzen ist in sehr geringem Abstand, etwa 0,1 mm, konzentrisch ein am Hahnkörper 1 befestigtes, weiteres Rohr 25 angeordnet, so daß der Ringraum des so entstehenden Doppelmantelrohres den Druckkanal 24 bildet. Als Verbindung zwischen Relais und Druckkanal, der mündungsseitig offen und am Hahnkörper abgedichtet ist, dient zweckmäßig eine Schlauchkapillare 26, die über eine Bohrung am Rohr 25 angeschlossen ist.Via a pressure line 27 there is a connection between the pressure chamber and a pneumatic relay 22 as a switching element, the input of which is connected to a pressure channel 24 extending to the mouth 23 of the outlet connection 3. A further tube 25 fastened to the valve body 1 is arranged concentrically around the outlet nozzle at a very short distance, approximately 0.1 mm, so that the annular space of the double-walled tube thus formed forms the pressure channel 24. A hose capillary 26, which is connected to the pipe 25 via a bore, expediently serves as the connection between the relay and the pressure channel, which is open on the mouth side and sealed on the valve body.

Während des Zapfbetriebs ist die Membran 21 vom Relais 22 über die Druckleitung mit Druckluft beaufschlagt, so daß die Stifte 16 gegen die Feder 17 in den Aussparungen 15 des Gestänges 10 gehalten werden. Übersteigt der Flüssigkeitsspiegel im zu füllenden Behälter die Mündung 23 des Auslaßstutzens 3, wird die Luft im Druckkanal 24 durch die Flüssigkeit leicht komprimiert. Infolge des sehr geringen Volumens des den Druckkanal bildenden Ringraumes und der Schlauchkapillare ist damit eine Druckerhöhung verbunden, die ausreicht, das pneumatische Relais 22 umzuschalten. Zur Verstärkung dieser Druckerhöhung ist der Ringspalt an der Mündung 23 erweitert. Nach dem Umschalten steht die Membran 21 nicht mehr unter Druck, so daß die an der Halterung 18 angreifende Druckfeder 17 die Stifte 16 aus den Aussparungen 15 schieben kann. Die Verbindung zwischen Führungsrohr 13 und Zugstab 14 ist dadurch gelöst. Die am Ventilkörper 6 angreifende Feder 8 kann diesen jetzt auf den Ventilsitz 9 pressen, wonach sich das Ventil in der Schließstellung befindet.During the tap operation, the membrane 21 is acted upon by compressed air from the relay 22 via the pressure line, so that the pins 16 are held against the spring 17 in the recesses 15 of the rod assembly 10. If the liquid level in the container to be filled exceeds the mouth 23 of the outlet nozzle 3, the air in the pressure channel 24 is slightly compressed by the liquid. As a result of the very small volume of the annular space forming the pressure channel and the tube capillary, a pressure increase is associated with this, which is sufficient to switch over the pneumatic relay 22. To increase this pressure increase, the annular gap at the mouth 23 is widened. After switching, the membrane 21 is no longer under pressure, so that the compression spring 17 acting on the holder 18 can push the pins 16 out of the recesses 15. The connection between the guide tube 13 and tension rod 14 is thereby released. The spring 8 acting on the valve body 6 can now press it onto the valve seat 9, after which the valve is in the closed position.

Wird die Mündung 23 des Auslaßstutzens 3 wieder frei, so schaltet das Relais 22 infolge des Druckabfalls zurück. Die Membran steht danach wieder unter Druck, so daß die Stifte 16 gegen das Gestänge 10 gedrückt werden und nach Zurückschieben des Zugstabes 14 durch den Abzugshebel 12 in die Schließstellung wieder in die Aussparungen 15 einrasten können. Das Ventil ist dann wieder betätigbar.If the mouth 23 of the outlet 3 is free again, the relay 22 switches back due to the pressure drop. The membrane is then again under pressure, so that the pins 16 are pressed against the linkage 10 and after pushing back the pull rod 14 by the trigger lever 12 in the closed position can snap back into the recesses 15. The valve can then be operated again.

Eine in der Zeichnung nicht dargestellte Weiterbildung des vorstehend beschriebenen Zapfhahns besteht darin, daß der Druckkanal 24 über einen seitlichen Nippel und eine Verbindungsleitung an eine Gasdruckquelle, z. B. Luft oder Stickstoff, angeschlossen ist. Das an der Mündung 23 des Auslaßstutzens 3 in sehr geringer Menge ständig ausströmende Gas hält den Ringspalt von irgendwelchen Ablagerungen, beispielsweise Kristallisationsprodukten, und von Resten der Zapfflüssigkeit frei. Taucht nun die Mündung in die Zapfflüssigkeit ein, erhöht sich der Strömungswiderstand am Ringspalt und damit der Druck im Druckkanal. Das pneumatische Relais 22, das zweckmäßig direkt mit dem Drucksystem verbunden ist, beispielsweise durch einen Bypass, spricht auf die Druckerhöhung an und bewirkt das Schließen des Ventils wie bereits geschildert. Wenn sich der Ringspalt wieder außerhalb der Flüssigkeit befindet, fällt der Staudruck im Kanal 24 ab, so daß die Schalteinrichtung 22, 21 das Ventil wieder in den betätigbaren Zustand bringt.A development, not shown in the drawing, of the tap described above is that the pressure channel 24 via a lateral nipple and a connecting line to a gas pressure source, for. B. air or nitrogen is connected. The gas flowing out at the mouth 23 of the outlet nozzle 3 in a very small amount keeps the annular gap free from any deposits, for example crystallization products, and from residues of the tap liquid. If the mouth is now immersed in the tap liquid, the flow resistance at the annular gap increases and thus the pressure in the pressure channel. The pneumatic relay 22, which is expediently connected directly to the pressure system, for example by a bypass, responds to the pressure increase and causes the valve to close as already described. When the annular gap is again outside the liquid, the dynamic pressure in the channel 24 drops, so that the switching device 22, 21 brings the valve back into the actuatable state.

Bezüglich der über den Einlaßstutzen in den Hahnkörper 1 einfließenden Flüssigkeit hat es sich als vorteilhaft erwiesen, die Abdichtung der Gehäusedurchführung des Führungsrohrs 13 durch einen Faltenbalg 36 vorzunehmen, der einerseits um die Durchführung und andererseits am Ventilkörper 6 befestigt ist. Eine Stopfbuchse als Dichtelement ist wegen der hohen Reibung mit dem Rohr für ein zuverlässiges Schließen des Ventils nicht geeignet.With regard to the liquid flowing into the valve body 1 via the inlet nozzle, it has proven to be advantageous to seal the housing bushing of the guide tube 13 by means of a bellows 36, which is fastened on the one hand around the bushing and on the other hand on the valve body 6. A stuffing box as a sealing element is not suitable for reliably closing the valve due to the high friction with the pipe.

Zur Absaugung der beim Abfüllen frei werdenden Lösungsmitteldämpfe dient der Abluftkanal 37.The exhaust air duct 37 is used to extract the solvent vapors released during filling.

Claims (2)

1. A nozzle for filling containers with liquid, with automatic termination of delivery when they are filled, comprising a nozzle body (1) which is equipped with an inlet tube and an outlet tube (2,3), a valve (5), which is located in the nozzle body and can be operated by means of a delivery lever, and is loaded in the closing direction, for controlling the flow of liquid from the inlet to the outlet, and a switching device which is located in the nozzle body and is controlled by the pressure prevailing at the orifice of the outlet tube and contains a drive member (21) which is acted upon by the working pressure and is coupled to a spring-loaded connecting element (16) which is located between the delivery lever and the valve (5), arrests the valve in the open position and can be moved by the drive member into a position which releases the valve, wherein the switching device has a pneumatic relay (22), which is connected on the control pressure side to a pressure channel (24) and on the working pressure side to the pneumatic drive member (21) and wherein the outlet tube (3) is constructed as a double-walled tube whose annular space serves as a pressure channel (24), which is connected to the pneumatic relay (22).
2. A nozzle as claimed in claim 1, wherein the pressure channel (24) is connected to a source of gas pressure.
EP82103361A 1981-05-05 1982-04-21 Automatically closing tap Expired EP0065117B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3117669 1981-05-05
DE19813117669 DE3117669A1 (en) 1981-05-05 1981-05-05 TAP WITH AUTOMATIC SHUTDOWN

Publications (3)

Publication Number Publication Date
EP0065117A2 EP0065117A2 (en) 1982-11-24
EP0065117A3 EP0065117A3 (en) 1983-04-27
EP0065117B1 true EP0065117B1 (en) 1988-01-13

Family

ID=6131456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82103361A Expired EP0065117B1 (en) 1981-05-05 1982-04-21 Automatically closing tap

Country Status (4)

Country Link
US (1) US4453577A (en)
EP (1) EP0065117B1 (en)
DE (2) DE3117669A1 (en)
ES (1) ES511913A0 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2643355B1 (en) * 1989-02-21 1991-04-19 Cga Hbs VEHICLE FUEL DISTRIBUTION SYSTEM
FR2839057B1 (en) * 2002-04-24 2004-07-16 Regis Emile Ferdinand Raux FILLING GUN WITH AUTOMATIC STOP
CN101590993B (en) * 2009-03-16 2012-09-05 杭州中亚机械股份有限公司 Aseptic filling valve
DE102014106404A1 (en) * 2014-05-07 2015-11-12 Khs Gmbh filling

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2209219A (en) * 1940-07-23 Automatic cut-off nozzle for
US2745585A (en) * 1951-02-20 1956-05-15 Lindars Herman Automatic filling apparatus for liquid containers
US3075563A (en) * 1961-02-27 1963-01-29 Buckeye Iron & Brass Works Automatic chemical handling nozzle
US3101101A (en) * 1961-07-31 1963-08-20 Curtiss Wright Corp System and mechanism for dispensing fluids
LU43573A1 (en) * 1962-04-19 1963-06-17
US3196908A (en) * 1963-03-11 1965-07-27 Emco Wheaton Nozzle with vacuum operated valve tripping means
US3380491A (en) * 1965-03-26 1968-04-30 Emco Wheaton Universal electric nozzle
BE794068A (en) * 1972-01-17 1973-07-16 Volucompteurs Aster Boutillon IMPROVEMENTS TO THE END OF AUTOMATIC CLOSING LIQUID DISTRIBUTION VALVES
GB1562494A (en) * 1975-09-12 1980-03-12 Emco Wheaton Nozzles
DE2551994C3 (en) * 1975-11-17 1980-05-29 Nalco Chemical Co., Oak Brook, Ill. (V.St.A.) Container footer
US4343336A (en) * 1978-01-24 1982-08-10 Trygg Lars Erik Liquid dispensing device

Also Published As

Publication number Publication date
ES8304028A1 (en) 1983-02-16
DE3277967D1 (en) 1988-02-18
DE3117669A1 (en) 1982-11-25
US4453577A (en) 1984-06-12
ES511913A0 (en) 1983-02-16
EP0065117A2 (en) 1982-11-24
EP0065117A3 (en) 1983-04-27

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