EP3889443B1 - Suction lifting device for emptying a tank - Google Patents

Suction lifting device for emptying a tank Download PDF

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Publication number
EP3889443B1
EP3889443B1 EP21160918.5A EP21160918A EP3889443B1 EP 3889443 B1 EP3889443 B1 EP 3889443B1 EP 21160918 A EP21160918 A EP 21160918A EP 3889443 B1 EP3889443 B1 EP 3889443B1
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EP
European Patent Office
Prior art keywords
suction
suction lifting
lifting device
emptying
gas mixture
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EP21160918.5A
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German (de)
French (fr)
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EP3889443A1 (en
Inventor
Günther SCHLESS
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Siemens Mobility GmbH
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Siemens Mobility GmbH
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Publication of EP3889443A1 publication Critical patent/EP3889443A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F10/00—Siphons
    • F04F10/02—Gravity-actuated siphons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/24—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing liquids, e.g. containing solids, or liquids and elastic fluids

Definitions

  • the invention relates to a suction lifting device for emptying a tank and a method for operating the suction lifting device.
  • a tank can be emptied actively using a pump or passively using gravity. To save costs and weight, emptying is often done passively. A duration of passive emptying of the tank depends on an outflow rate of a tank's contents from the tank. In order to limit the emptying duration during passive emptying, a sufficiently high outflow rate is required. This can be achieved by using large cable cross-sections. The large cable cross-sections mean that correspondingly large and therefore heavy shut-off valves are required. These shut-off valves can be dispensed with by using a suction lifting device.
  • the suction lifting device is a device for lifting a liquid.
  • the lifting of the liquid is based on a gravitational hydrostatic pressure difference between a suction opening and an outlet opening of a discharge line of the suction lifting device.
  • a suction lifting process ends as soon as a liquid level in the tank contents drops below the suction opening.
  • CN 2 057 483 U , GB 2 289 505 A and JP S55 20645 U show, for example, generic suction lifting devices.
  • GB 2 289 505 A There is a valve in the downpipe and a Venturi nozzle underneath, which supplies compressed air and causes the tank contents to be sucked in.
  • EP 2 604 909 A1 teaches a compressed air supply to a tank in order to to effect emptying via a riser according to the siphon principle.
  • the publication AT 257 374 B discloses a suction lifting device for emptying a tank according to the preamble of claim 1.
  • Another suction lifting device from the prior art is in the publication KR 102 007 124 B1 disclosed.
  • the invention is based on the object of providing a device with improved operating properties.
  • the invention is based on the object of providing a method for operating the suction lifting device according to the invention.
  • the suction lifting device provides that a ventilation opening is arranged in a section of the drain line located between the suction opening and the outlet opening, by means of which a gas or gas mixture can be fed to the drain line. Furthermore, a closure device is provided, by means of which the aforementioned supply of the gas or the gas mixture can be stopped.
  • Vententilation opening should be understood to mean an opening that is at least partially delimited by an outer wall of the drain line and which penetrates the outer wall of the drain line.
  • the closure device can be designed as a closure cap, a plug, a fitting, a valve or another component that appears useful to a person skilled in the art.
  • an initiated suction lifting process can be reliably aborted at any time.
  • a pressure sink is provided, by means of which a gas or a gas mixture can be extracted from the drain line.
  • a “pressure sink” is to be understood as a device by means of which a pressure gradient can be provided from an ambient air pressure to a lower pressure.
  • the pressure sink can be, for example, an intake side of a compressor or an at least partially evacuated space whose internal pressure is lower than an ambient air pressure.
  • the withdrawn gas or gas mixture can be either a gas or gas mixture that was already in the emptying line before the suction lifting process was initiated or the gas or gas mixture that was added to the emptying line to stop the suction lifting process.
  • a first initiation or a continuation of an aborted suction lifting process can be prepared by the pressure sink causing liquid to be transported from a tank into the downpipe section by means of the said withdrawal of the gas and the gas mixture from the drain line.
  • a gas or gas mixture can be removed from the drain line through the ventilation opening.
  • the pressure sink is then designed as a suction pipe of a Venturi nozzle.
  • the gas or the gas mixture can be removed from the drain line using the suction pipe.
  • the Venturi nozzle can be used to provide a lightweight and compact pressure sink.
  • a pressure source is provided, by means of which the gas or gas mixture that can be fed to the drain line can be fed as a compressed gas or gas mixture.
  • a “pressure source” is to be understood as meaning a device which produces a gas or gas that is compressed relative to ambient air pressure Can provide gas mixture.
  • the pressure source can be, for example, a compressor or a compressed air reservoir.
  • a diversion device by means of which the compressed gas or gas mixture can be diverted to the suction pipe.
  • the compressed gas or gas mixture can be fed to the drain line using the suction pipe.
  • the diverter is preferably arranged downstream of an output side of the Venturi nozzle.
  • a valve for example, can be provided as a diverting device.
  • the compressed gas or gas mixture can either be supplied to the drain line or the gas or gas mixture can be withdrawn from the drain line.
  • Several functions can be combined in one component, thus reducing the total number of required components.
  • the closure device is connected to a line which opens into the ventilation opening.
  • the line can open directly into the ventilation opening or be connected to a line which opens directly into the ventilation opening.
  • the closure device can open directly into the ventilation opening.
  • the ventilation opening can be closed safely and reliably by the described development in order to prevent an unintentional termination of the suction lifting process.
  • the ventilation opening is arranged above the suction opening in an operating orientation of the suction lifting device.
  • operating orientation refers to an orientation of the suction lifting device in which it is ready for operation, i.e. can work in the intended manner.
  • This operational orientation requires that the intake port be located above the exhaust port. This allows a hydrostatic pressure difference to be built up within the suction lifting device.
  • the ventilation opening can be arranged in a riser section or in a downpipe section.
  • a “downline section” is to be understood as meaning a section of the emptying line in which a liquid falls along a direction of the gravitational force during operation of the suction lifting device.
  • a “riser” is to be understood as meaning a section of the emptying line in which a liquid rises against a direction of the gravitational force when the suction lifting device is in operation.
  • the term "above” is intended to be understood broadly in this description. An object located above a reference object may be located along a vertical line through the reference object or away from the vertical line passing through the reference object.
  • a ventilation volume and/or a ventilation pressure required to cancel the suction lifting process can be kept small.
  • An advantageous embodiment variant provides that the ventilation opening is arranged in a vertex of the drain line.
  • the ventilation opening is arranged in the apex, the ventilation volume required to terminate the suction lifting process and the required ventilation pressure can be minimized.
  • the dimensioning of the The components required to abort the suction lifting process can also be optimized, meaning that installation space can be used efficiently and weight can be saved.
  • a blocking element is arranged in a downpipe section of the drain line.
  • a “blocking element” is to be understood as meaning a fitting that is designed to interrupt a flow of liquid.
  • a liquid flow in the emptying line and thus the suction lifting process can be interrupted. If there is an interruption in the suction lifting process, aborting the suction lifting process can be made easier because an unwanted removal of the supplied gas or gas mixture with the liquid flow is prevented. A required ventilation volume can therefore be used efficiently due to the interruption of the suction lifting process.
  • the blocking element is preferably designed as a pneumatic pinch valve. As a result, a cost-effective and compact component can be used and existing installation space can be used efficiently.
  • the suction lifting device described above can be advantageously used in a vehicle.
  • the vehicle then has a tank and the suction lifting device according to the invention.
  • the suction opening is arranged within the tank in the operating orientation of the suction lifting device. This design variant has proven itself in practice.
  • the suction lifting device according to the invention can be operated using the method according to the invention.
  • the method provides that a suction lifting process is aborted by ventilating the emptying line using a ventilation opening located between the suction opening and the outlet opening.
  • a suction lifting process is aborted by ventilating the emptying line using a ventilation opening located between the suction opening and the outlet opening.
  • An advantageous development provides that a liquid flow in the drain line is interrupted by means of the blocking element. By interrupting the liquid flow, an interruption of the suction lifting process can be realized.
  • An advantageous embodiment variant provides that the drain line is ventilated after the liquid flow has been interrupted. Interrupting the flow of liquid can make lifting easier compared to a continuous suction lift. An operational removal of a ventilation volume can be prevented.
  • the drain line is ventilated with excess pressure. This makes it possible to terminate the suction lifting process particularly reliably and quickly, even with larger cross-sections of the emptying line using relatively light and compact components.
  • FIG 1 shows a rail-bound vehicle 42 with a tank 12 and a suction lifting device 10.
  • the suction lifting device 10 is set up to empty the tank 12 using gravitational force.
  • the suction lifting device 10 has an emptying line 14.
  • the drain line 14 has a downpipe section 40 with an outlet opening 18 and a riser section 48 with a suction opening 16.
  • a blocking element 38 is arranged in the downpipe section 40.
  • the blocking element 38 is designed as a pneumatic pinch valve. By means of the blocking element 38, a liquid flow in the emptying line 14 can be interrupted. Furthermore, a liquid can be accumulated in the downpipe section 40 by means of the blocking element 38.
  • FIG 1 further shows the suction lifting device 10 in an operating orientation.
  • the suction opening 16 is arranged above the outlet opening 18.
  • a tank content can be transported from the suction opening 16 to the outlet opening 18.
  • a suction lifting process can be initiated.
  • the tank 12 can then be emptied.
  • FIG 2 shows the suction lifting device 10 and illustrates an example of a method for operating the suction lifting device 10.
  • a pressure source 28 is provided in the present exemplary embodiment, by means of which compressed ambient air can be supplied as a gas mixture to the emptying line 14.
  • the pressure source 28 is designed as a compressor.
  • a ventilation opening 20 is arranged in a section of the drain line 14 located between the suction opening 16 and the outlet opening 18.
  • the ventilation opening 20 penetrates an outer wall of the emptying line 14.
  • the ventilation opening 20 is arranged above the suction opening 16 in a vertex 26 of the emptying line 14.
  • a closure device 22 is provided, which is connected to a line 24 which opens into the ventilation opening 20.
  • the closure device 22 is designed as a valve by means of which the aforementioned supply of the gas mixture can be stopped.
  • the closure device 22 is arranged in the line 24 between the pressure source 28 and the ventilation opening 20.
  • the closure device 22 In the event that the suction lifting device 10 is to be operated to empty the tank 12, the closure device 22 must be closed. In the event that a suction lifting process is to be aborted, the closure device 22 is opened. The compressed gas mixture can then flow through the closure device 22.
  • the compressed gas mixture is passed through a Venturi nozzle 34 in the present exemplary embodiment.
  • the Venturi nozzle 34 is arranged in the line 24 in a flow direction of the compressed gas mixture after the closure device 22.
  • An embodiment of the Venturi nozzle 34 is shown in FIG 3 shown in more detail.
  • the Venturi nozzle 34 has an inlet side 44, an outlet side 46 and a suction pipe 32.
  • the Venturi nozzle 34 can be operated in two different ways. When the Venturi nozzle 34 is in suction mode, the compressed gas mixture can flow unhindered from the inlet side 44 to the outlet side 46. Due to the well-known construction of the Venturi nozzle 34, a negative pressure is thereby generated on the suction pipe 32.
  • the inlet side 44 and the suction pipe 32 are each connected to a section of the line 24, which opens into the ventilation opening 20.
  • the suction pipe 32 is thus designed in the suction mode as a pressure sink 30, by means of which a gas mixture can be removed from the emptying line 14.
  • a diversion device 36 is provided.
  • the diverting device 36 is designed as a valve.
  • the compressed gas mixture can be diverted to the suction pipe 32.
  • By closing the diverter device 36 an unhindered flow of the compressed gas mixture from the inlet side 44 to the outlet side 46 is prevented.
  • the compressed gas mixture flowing into the inlet side 44 exits to the suction pipe 32 in the case of the closed diversion device 36.
  • the compressed gas mixture can thus be supplied to the ventilation opening 20 by means of the Venturi nozzle 34 in the diversion mode and the drain line 14 can be ventilated with excess pressure.
  • a downstream side of the diverting device 36 opens into the downpipe section 40 below the blocking element 38.
  • FIG 2 Illustrates how a suction lifting process can be started, interrupted or canceled using the previously described suction lifting device:
  • the locking element 38 arranged in the downpipe section 40 must be activated getting closed.
  • a gas or gas mixture is then removed from the drain line 14 by means of the pressure sink 30, i.e. the Venturi nozzle 34 in a suction mode. Due to the negative pressure in the emptying line 14, a tank contents from the tank 12 are conveyed through the suction opening 16 into the downpipe section 40. If a hydrostatic pressure of a liquid in the downpipe section 40 exceeds a hydrostatic pressure of a liquid in the riser section 48, the locking element 38 can be opened and the suction lifting process is started.
  • the suction lifting process can be interrupted by closing the locking element 38. As a result, the liquid flow in the emptying line 14 with the blocking element 38 is interrupted. The interrupted suction lifting process can then be continued by opening the locking element 38.
  • the Venturi nozzle 34 is operated in bypass mode.
  • the drain line 14 can be ventilated using the ventilation opening 20.
  • the drain line 14 is ventilated with excess pressure.
  • the suction lifting process can be canceled both during uninterrupted and interrupted suction lifting processes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Jet Pumps And Other Pumps (AREA)

Description

Die Erfindung betrifft eine Saughebevorrichtung zur Entleerung eines Tanks und ein Verfahren zum Betrieb der Saughebevorrichtung.The invention relates to a suction lifting device for emptying a tank and a method for operating the suction lifting device.

Die Entleerung eines Tanks kann aktiv mittels einer Pumpe oder passiv mittels Schwerkraft erfolgen. Um Kosten und Gewicht zu sparen wird häufig passiv entleert. Eine Dauer der passiven Entleerung des Tanks hängt von einer Abflussrate eines Tankinhalts aus dem Tank ab. Damit bei der passiven Entleerung eine Entleerdauer begrenzt werden kann, ist somit eine ausreichend hohe Abflussrate erforderlich. Diese kann realisiert werden, indem große Leitungsquerschnitte eingesetzt werden. Die großen Leitungsquerschnitte haben zur Folge, dass entsprechend groß dimensionierte und somit schwere Absperrarmaturen benötigt werden. Auf diese Absperrarmaturen kann mit der Verwendung einer Saughebevorrichtung verzichtet werden. Die Saughebevorrichtung ist eine Vorrichtung zum Heben einer Flüssigkeit. Das Heben der Flüssigkeit basiert auf einer gravitationsbedingten hydrostatischen Druckdifferenz zwischen einer Ansaugöffnung und einer Auslassöffnung einer Entleerleitung der Saughebevorrichtung. Nachdem ein Saughebevorgang einmal gestartet wurde, kann dieser jedoch nicht mehr ohne weiteres abgebrochen werden. Der Saughebevorgang endet bei bisherigen Ausgestaltungsformen, sobald ein Flüssigkeitsspiegel des Tankinhalts unter die Ansaugöffnung absinkt.A tank can be emptied actively using a pump or passively using gravity. To save costs and weight, emptying is often done passively. A duration of passive emptying of the tank depends on an outflow rate of a tank's contents from the tank. In order to limit the emptying duration during passive emptying, a sufficiently high outflow rate is required. This can be achieved by using large cable cross-sections. The large cable cross-sections mean that correspondingly large and therefore heavy shut-off valves are required. These shut-off valves can be dispensed with by using a suction lifting device. The suction lifting device is a device for lifting a liquid. The lifting of the liquid is based on a gravitational hydrostatic pressure difference between a suction opening and an outlet opening of a discharge line of the suction lifting device. However, once a suction lifting process has been started, it cannot be easily canceled. In previous embodiments, the suction lifting process ends as soon as a liquid level in the tank contents drops below the suction opening.

CN 2 057 483 U , GB 2 289 505 A und JP S55 20645 U zeigen beispielsweise gattungsgemäße Saughebevorrichtungen. Gemäß GB 2 289 505 A ist ein Ventil in der Fallleitung und hierunter eine Venturi-Düse vorgesehen, die mit Druckluft versorgt, die Ansaugung des Tankinhalts bewirkt. Die Offenlegungsschrift EP 2 604 909 A1 lehrt eine Druckluftzuführung zu einem Tank, um eine Entleerung über eine Steigleitung nach dem Heber-Prinzip zu bewirken. CN 2 057 483 U , GB 2 289 505 A and JP S55 20645 U show, for example, generic suction lifting devices. According to GB 2 289 505 A There is a valve in the downpipe and a Venturi nozzle underneath, which supplies compressed air and causes the tank contents to be sucked in. The disclosure document EP 2 604 909 A1 teaches a compressed air supply to a tank in order to to effect emptying via a riser according to the siphon principle.

Die Druckschrift AT 257 374 B offenbart eine Saughebevorrichtung zur Entleerung eines Tanks gemäß dem Obergriff des Patentanspruchs 1. Eine weitere Saughebevorrichtung aus dem Stand der Technik ist in der Druckschrift KR 102 007 124 B1 offenbart.The publication AT 257 374 B discloses a suction lifting device for emptying a tank according to the preamble of claim 1. Another suction lifting device from the prior art is in the publication KR 102 007 124 B1 disclosed.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung mit verbesserten Betriebseigenschaften bereitzustellen.The invention is based on the object of providing a device with improved operating properties.

Diese Aufgabe wird gelöst durch eine Saughebevorrichtung mit den Merkmalen des Anspruchs 1.This task is solved by a suction lifting device with the features of claim 1.

Des Weiteren liegt der Erfindung die Aufgabe zugrunde, ein Verfahren zum Betrieb der erfindungsgemäßen Saughebevorrichtung bereitzustellen.Furthermore, the invention is based on the object of providing a method for operating the suction lifting device according to the invention.

Diese Aufgabe wird erfindungsgemäß durch ein Verfahren mit den Merkmalen des nebengeordneten Verfahrensanspruchs gelöst.This object is achieved according to the invention by a method with the features of the independent method claim.

Vorteilhafte Weiterbildungen der vorliegenden Erfindung können jeweils abhängigen Unteransprüchen entnommen werden.Advantageous developments of the present invention can be found in the dependent subclaims.

Die erfindungsgemäße Saughebevorrichtung sieht vor, dass in einem zwischen der Ansaugöffnung und der Auslassöffnung gelegenen Abschnitt der Entleerleitung eine Belüftungsöffnung angeordnet ist, mittels derer ein Gas oder Gasgemisch der Entleerleitung zuführbar ist. Des Weiteren ist eine Verschlussvorrichtung vorgesehen, mittels welcher das genannte Zuführen des Gases oder des Gasgemisches unterbindbar ist. Unter "Belüftungsöffnung" soll eine von einer Außenwandung der Entleerleitung zumindest teilweise begrenzte Öffnung verstanden werden, welche die Außenwandung der Entleerleitung durchdringt. Die Verschlussvorrichtung kann als eine Verschlusskappe, ein Stopfen, eine Armatur, ein Ventil oder ein anderes, dem Fachmann sinnvoll erscheinendes Bauteil ausgebildet sein.The suction lifting device according to the invention provides that a ventilation opening is arranged in a section of the drain line located between the suction opening and the outlet opening, by means of which a gas or gas mixture can be fed to the drain line. Furthermore, a closure device is provided, by means of which the aforementioned supply of the gas or the gas mixture can be stopped. “Ventilation opening” should be understood to mean an opening that is at least partially delimited by an outer wall of the drain line and which penetrates the outer wall of the drain line. The closure device can be designed as a closure cap, a plug, a fitting, a valve or another component that appears useful to a person skilled in the art.

Durch das Zuführen des Gases oder des Gasgemisches mittels der Belüftungsöffnung kann ein initiierter Saughebevorgang jederzeit zuverlässig abgebrochen werden.By supplying the gas or the gas mixture via the ventilation opening, an initiated suction lifting process can be reliably aborted at any time.

Erfindungsgemäß ist eine Drucksenke vorgesehen, mittels welcher der Entleerleitung ein Gas oder ein Gasgemisch entziehbar ist.According to the invention, a pressure sink is provided, by means of which a gas or a gas mixture can be extracted from the drain line.

Unter einer "Drucksenke" soll eine Vorrichtung verstanden werden, mittels welcher ein Druckgefälle ausgehend von einem Umgebungsluftdruck hin zu einem niedrigeren Druck bereitgestellt werden kann. Die Drucksenke kann beispielsweise eine Ansaugseite eines Verdichters oder ein zumindest teilweise evakuierter Raum sein, dessen Innendruck geringer ist als ein Umgebungsluftdruck. Das entzogene Gas oder Gasgemisch kann sowohl ein sich bereits vor einer Ingangsetzung des Saughebevorgangs in der Entleerleitung befindliches Gas oder Gasgemisch sein oder das Gas oder Gasgemisch, welches zu einem Abbruch des Saughebevorgangs der Entleerleitung zugefügt wurde.A “pressure sink” is to be understood as a device by means of which a pressure gradient can be provided from an ambient air pressure to a lower pressure. The pressure sink can be, for example, an intake side of a compressor or an at least partially evacuated space whose internal pressure is lower than an ambient air pressure. The withdrawn gas or gas mixture can be either a gas or gas mixture that was already in the emptying line before the suction lifting process was initiated or the gas or gas mixture that was added to the emptying line to stop the suction lifting process.

Eine erste Ingangsetzung oder eine Fortführung eines abgebrochenen Saughebevorgangs kann vorbereitet werden, indem die Drucksenke mittels des genannten Entzugs des Gases und des Gasgemisches aus der Entleerleitung ein Transport von Flüssigkeit aus einem Tank in den Fallleitungsabschnitt bewirkt.A first initiation or a continuation of an aborted suction lifting process can be prepared by the pressure sink causing liquid to be transported from a tank into the downpipe section by means of the said withdrawal of the gas and the gas mixture from the drain line.

Mittels der Drucksenke ist der Entleerleitung durch die Belüftungsöffnung ein Gas oder Gasgemisch entziehbar.By means of the pressure sink, a gas or gas mixture can be removed from the drain line through the ventilation opening.

Fürderhin ist die Drucksenke als ein Saugrohr einer Venturi-Düse ausgebildet. Mittels des Saugrohrs ist der Entleerleitung das Gas oder das Gasgemisch entziehbar. Mit der Venturi-Düse kann eine leichte und kompaktbauende Drucksenke bereitgestellt werden.The pressure sink is then designed as a suction pipe of a Venturi nozzle. The gas or the gas mixture can be removed from the drain line using the suction pipe. The Venturi nozzle can be used to provide a lightweight and compact pressure sink.

Des Weiteren ist eine Druckquelle vorgesehen, mittels welcher das der Entleerleitung zuführbare Gas oder Gasgemisch als verdichtetes Gas oder Gasgemisch zuführbar ist. Unter einer "Druckquelle" soll eine Vorrichtung verstanden werden, welche ein gegenüber eines Umgebungsluftdrucks verdichtetes Gas oder Gasgemisch bereitstellen kann. Die Druckquelle kann zum Beispiel ein Verdichter oder ein Druckluftspeicher sein.Furthermore, a pressure source is provided, by means of which the gas or gas mixture that can be fed to the drain line can be fed as a compressed gas or gas mixture. A “pressure source” is to be understood as meaning a device which produces a gas or gas that is compressed relative to ambient air pressure Can provide gas mixture. The pressure source can be, for example, a compressor or a compressed air reservoir.

Mittels der genannten Zuführung des Gases oder des Gasgemisches mit Überdruck können beliebig große Leitungsquerschnitte der Entleerleitung zuverlässig und schnell belüftet werden.By means of the above-mentioned supply of the gas or the gas mixture with excess pressure, pipe cross-sections of any size in the drain pipe can be ventilated reliably and quickly.

Darüber hinaus ist eine Umleitvorrichtung vorgesehen, mittels welcher das verdichtete Gas oder Gasgemisch zu dem Saugrohr hin umleitbar ist. Mittels des Saugrohrs ist das verdichtete Gas oder Gasgemisch der Entleerleitung zuführbar. Die Umleitvorrichtung ist vorzugsweise stromabwärts einer Ausgangsseite der Venturi-Düse angeordnet. Als Umleitvorrichtung kann beispielsweise ein Ventil vorgesehen sein. Mittels der stromabwärts der Ausgangsseite der Venturi-Düse angeordneten Umleitvorrichtung kann das die Venturi-Düse durchströmende verdichtete Gas oder Gasgemisch aufgestaut werden. In Folge des Aufstauens wird das Gas oder Gasgemisch von einer Eingangsseite der Venturi-Düse zu dem Saugrohr umgeleitet.In addition, a diversion device is provided, by means of which the compressed gas or gas mixture can be diverted to the suction pipe. The compressed gas or gas mixture can be fed to the drain line using the suction pipe. The diverter is preferably arranged downstream of an output side of the Venturi nozzle. A valve, for example, can be provided as a diverting device. By means of the diverting device arranged downstream of the outlet side of the Venturi nozzle, the compressed gas or gas mixture flowing through the Venturi nozzle can be dammed up. As a result of the damming, the gas or gas mixture is diverted from an inlet side of the venturi nozzle to the intake manifold.

Durch die beschriebene Ausgestaltung kann wahlweise der Entleerleitung das verdichtete Gas oder Gasgemisch zugeführt werden oder der Entleerleitung das Gas oder Gasgemisch entzogen werden. Es können mehrere Funktionen in einem Bauteil vereinigt werden und somit eine Gesamtanzahl an erforderlichen Bauteilen reduziert werden.Through the configuration described, the compressed gas or gas mixture can either be supplied to the drain line or the gas or gas mixture can be withdrawn from the drain line. Several functions can be combined in one component, thus reducing the total number of required components.

Eine vorteilhafte Weiterbildung sieht vor, dass die Verschlussvorrichtung mit einer Leitung verbunden ist, welche in die Belüftungsöffnung mündet. Die Leitung kann hierbei unmittelbar in die Belüftungsöffnung münden oder mit einer Leitung verbunden sein, welche unmittelbar in die Belüftungsöffnung mündet. Alternativ kann die Verschlussvorrichtung unmittelbar in die Belüftungsöffnung münden. Die Belüftungsöffnung kann durch die beschriebene Weiterbildung sicher und zuverlässig verschlossen werden, um einen ungewollten Abbruch des Saughebevorgangs zu verhindern.An advantageous development provides that the closure device is connected to a line which opens into the ventilation opening. The line can open directly into the ventilation opening or be connected to a line which opens directly into the ventilation opening. Alternatively, the closure device can open directly into the ventilation opening. The ventilation opening can be closed safely and reliably by the described development in order to prevent an unintentional termination of the suction lifting process.

In einer weiteren vorteilhaften Weiterbildung wird vorgeschlagen, dass die Belüftungsöffnung in einer Betriebsausrichtung der Saughebevorrichtung oberhalb der Ansaugöffnung angeordnet ist. Der Begriff "Betriebsausrichtung" bezeichnet eine Ausrichtung der Saughebevorrichtung, in welcher diese zum Betrieb bereit ist, also in der vorgesehenen Weise arbeiten kann. Diese Betriebsausrichtung erfordert, dass die Ansaugöffnung oberhalb der Auslassöffnung angeordnet ist. Hierdurch kann eine hydrostatische Druckdifferenz innerhalb der Saughebevorrichtung aufgebaut werden. Somit kann im Betrieb der Saughebevorrichtung eine Flüssigkeit von der Ansaugöffnung zu der Auslassöffnung transportiert werden. Die Belüftungsöffnung kann in einem Steigleitungsabschnitt oder in einem Fallleitungsabschnitt angeordnet sein. Unter einem "Fallleitungsabschnitt" ist ein Abschnitt der Entleerleitung zu verstehen, in welchem eine Flüssigkeit bei einem Betrieb der Saughebevorrichtung entlang einer Richtung der Gravitationskraft fällt. Entsprechend ist unter einer "Steigleitung" ein Abschnitt der Entleerleitung zu verstehen, in welchem eine Flüssigkeit bei einem Betrieb der Saughebevorrichtung entgegen einer Richtung der Gravitationskraft steigt. Der Begriff "oberhalb" soll in der vorliegenden Beschreibung weit gefasst verstanden werden. Ein oberhalb eines Bezugsobjekts angeordnetes Objekt kann entlang einer vertikalen Linie durch das Bezugsobjekt oder abseits der durch das Bezugsobjekt verlaufenden vertikalen Linie angeordnet sein.In a further advantageous development, it is proposed that the ventilation opening is arranged above the suction opening in an operating orientation of the suction lifting device. The term “operating orientation” refers to an orientation of the suction lifting device in which it is ready for operation, i.e. can work in the intended manner. This operational orientation requires that the intake port be located above the exhaust port. This allows a hydrostatic pressure difference to be built up within the suction lifting device. Thus, during operation of the suction lifting device, a liquid can be transported from the suction opening to the outlet opening. The ventilation opening can be arranged in a riser section or in a downpipe section. A “downline section” is to be understood as meaning a section of the emptying line in which a liquid falls along a direction of the gravitational force during operation of the suction lifting device. Accordingly, a “riser” is to be understood as meaning a section of the emptying line in which a liquid rises against a direction of the gravitational force when the suction lifting device is in operation. The term "above" is intended to be understood broadly in this description. An object located above a reference object may be located along a vertical line through the reference object or away from the vertical line passing through the reference object.

Durch die Anordnung der Belüftungsöffnung oberhalb der Ansaugöffnung kann ein zum Abbrechen des Saughebevorgangs erforderliches Belüftungsvolumen und/oder ein erforderlicher Belüftungsdruck klein gehalten werden.By arranging the ventilation opening above the suction opening, a ventilation volume and/or a ventilation pressure required to cancel the suction lifting process can be kept small.

Eine vorteilhafte Ausgestaltungsvariante sieht vor, dass die Belüftungsöffnung in einem Scheitelpunkt der Entleerleitung angeordnet ist. Durch die Anordnung der Belüftungsöffnung im Scheitelpunkt kann das zum Abbruch des Saughebevorgangs erforderliche Belüftungsvolumen sowie der erforderliche Belüftungsdruck minimiert werden. Die Dimensionierung der zum Abbruch des Saughebevorgangs erforderlichen Bauteile kann somit ebenfalls optimiert werden, womit ein Bauraum effizient genutzt und Gewicht eingespart werden kann.An advantageous embodiment variant provides that the ventilation opening is arranged in a vertex of the drain line. By arranging the ventilation opening in the apex, the ventilation volume required to terminate the suction lifting process and the required ventilation pressure can be minimized. The dimensioning of the The components required to abort the suction lifting process can also be optimized, meaning that installation space can be used efficiently and weight can be saved.

In einer vorteilhaften Weiterbildung ist ein Sperrelement in einem Fallleitungsabschnitt der Entleerleitung angeordnet. Unter einem "Sperrelement" soll hierbei eine Armatur verstanden werden, welche dazu eingerichtet ist, einen Flüssigkeitsstrom zu unterbrechen.In an advantageous development, a blocking element is arranged in a downpipe section of the drain line. A “blocking element” is to be understood as meaning a fitting that is designed to interrupt a flow of liquid.

Mittels des Sperrelements kann ein Flüssigkeitsstrom in der Entleerleitung und somit der Saughebevorgang unterbrochen werden. Liegt eine Unterbrechung des Saughebevorgangs vor, kann ein Abbruch des Saughebevorgangs erleichtert werden, da ein ungewollter Abtransport des zugeführten Gases oder Gasgemisches mit dem Flüssigkeitsstrom verhindert wird. Ein erforderliches Belüftungsvolumen kann somit aufgrund der Unterbrechung des Saughebevorgangs effizient eingesetzt werden.By means of the blocking element, a liquid flow in the emptying line and thus the suction lifting process can be interrupted. If there is an interruption in the suction lifting process, aborting the suction lifting process can be made easier because an unwanted removal of the supplied gas or gas mixture with the liquid flow is prevented. A required ventilation volume can therefore be used efficiently due to the interruption of the suction lifting process.

Vorzugsweise ist das Sperrelement als ein pneumatisches Quetschventil ausgebildet. Hierdurch kann ein kostengünstiges und kompaktes Bauelement verwendet werden und ein vorhandener Bauraum effizient genutzt werden.The blocking element is preferably designed as a pneumatic pinch valve. As a result, a cost-effective and compact component can be used and existing installation space can be used efficiently.

Die vorstehend beschriebene Saughebevorrichtung kann vorteilhaft in einem Fahrzeug verwendet werden. Das Fahrzeug weist sodann einen Tank und die erfindungsgemäße Saughebevorrichtung auf. In der vorliegenden Ausführungsvariante ist in der Betriebsausrichtung der Saughebevorrichtung die Ansaugöffnung innerhalb des Tanks angeordnet. Diese Ausführungsvariante hat sich in der Praxis bewährt.The suction lifting device described above can be advantageously used in a vehicle. The vehicle then has a tank and the suction lifting device according to the invention. In the present embodiment variant, the suction opening is arranged within the tank in the operating orientation of the suction lifting device. This design variant has proven itself in practice.

Mittels des erfindungsgemäßen Verfahrens kann die erfindungsgemäße Saughebevorrichtung betrieben werden.The suction lifting device according to the invention can be operated using the method according to the invention.

Das Verfahren sieht vor, dass ein Saughebevorgang abgebrochen wird, indem die Entleerleitung mittels einer zwischen der Ansaugöffnung und der Auslassöffnung gelegenen Belüftungsöffnung belüftet wird. Mit dem erfindungsgemäßen Verfahren kann eine ungewollte Entleerung des Tanks zuverlässig und aufwandsgünstig verhindert werden. Des Weiteren wird eine Teilentleerung des Tanks mittels der Saughebevorrichtung ermöglicht.The method provides that a suction lifting process is aborted by ventilating the emptying line using a ventilation opening located between the suction opening and the outlet opening. With the method according to the invention, an unwanted emptying of the tank can be done reliably and can be prevented at low cost. Furthermore, the tank can be partially emptied using the suction lifting device.

Eine vorteilhafte Weiterbildung sieht vor, dass ein Flüssigkeitsstrom in der Entleerleitung mittels des Sperrelements unterbrochen wird. Durch die Unterbrechung des Flüssigkeitsstroms kann eine Unterbrechung des Saughebevorgangs realisiert werden.An advantageous development provides that a liquid flow in the drain line is interrupted by means of the blocking element. By interrupting the liquid flow, an interruption of the suction lifting process can be realized.

Eine vorteilhafte Ausführungsvariante sieht vor, dass nach dem Unterbrechen des Flüssigkeitsstroms die Entleerleitung belüftet wird. Durch das Unterbrechen des Flüssigkeitsstroms kann im Vergleich zu einem ununterbrochenen Saughebevorgang erleichtert werden. Ein betriebsbedingter Abtransport eines Belüftungsvolumens kann verhindert werden.An advantageous embodiment variant provides that the drain line is ventilated after the liquid flow has been interrupted. Interrupting the flow of liquid can make lifting easier compared to a continuous suction lift. An operational removal of a ventilation volume can be prevented.

In einer vorteilhaften Weiterbildung wird vorgeschlagen, dass die Entleerleitung mit Überdruck belüftet wird. Hierdurch kann ein besonders zuverlässiger und rascher Abbruch des Saughebevorgangs auch bei größeren Querschnitten der Entleerleitung mit verhältnismäßig leichten und kompaktbauenden Bauteilen ermöglicht werden.In an advantageous development, it is proposed that the drain line is ventilated with excess pressure. This makes it possible to terminate the suction lifting process particularly reliably and quickly, even with larger cross-sections of the emptying line using relatively light and compact components.

Die oben beschriebenen Eigenschaften, Merkmale und Vorteile dieser Erfindung sowie die Art und Weise, wie diese erreicht werden, werden klarer und deutlicher verständlich im Zusammenhang mit der folgenden Beschreibung des Ausführungsbeispiels, das im Zusammenhang mit den Zeichnungen näher erläutert wird.The characteristics, features and advantages of this invention described above and the manner in which these are achieved will be more clearly and clearly understood in connection with the following description of the exemplary embodiment, which will be explained in more detail in connection with the drawings.

Soweit zweckdienlich, sind in den Figuren gleich wirkende Elemente mit gleichen Bezugszeichen versehen. Die Erfindung ist nicht auf das in den Figuren dargestellte Ausführungsbeispiel beschränkt - auch nicht in Bezug auf funktionale Merkmale.Where appropriate, elements that have the same effect in the figures are provided with the same reference numerals. The invention is not limited to the exemplary embodiment shown in the figures - not even with regard to functional features.

Es zeigen:

FIG 1
Ein Fahrzeug mit einer erfindungsgemäßen Saughebevorrichtung in einer schematischen Darstellung.
FIG 2
Die erfindungsgemäße Saughebevorrichtung aus FIG 1 in einer schematischen Darstellung und eine Illustration des erfindungsgemäßen Verfahrens.
FIG 3
Eine beispielhafte Ausführungsform der verwendeten Venturi-Düse in einer schematischen Darstellung.
Show it:
FIG 1
A vehicle with a suction lifting device according to the invention in a schematic representation.
FIG 2
The suction lifting device according to the invention FIG 1 in a schematic representation and an illustration of the method according to the invention.
FIG 3
An exemplary embodiment of the Venturi nozzle used in a schematic representation.

FIG 1 zeigt ein schienengebundenes Fahrzeug 42 mit einem Tank 12 und einer Saughebevorrichtung 10. Die Saughebevorrichtung 10 ist dazu eingerichtet, den Tank 12 mittels Gravitationskraft zu entleeren. Hierzu weist die Saughebevorrichtung 10 eine Entleerleitung 14 auf. Die Entleerleitung 14 weist einen Fallleitungsabschnitt 40 mit einer Auslassöffnung 18 und einen Steigleitungsabschnitt 48 mit einer Ansaugöffnung 16 auf. In dem Fallleitungsabschnitt 40 ist ein Sperrelement 38 angeordnet. Das Sperrelement 38 ist als ein pneumatisches Quetschventil ausgebildet. Mittels des Sperrelements 38 kann ein Flüssigkeitsstrom in der Entleerleitung 14 unterbrochen werden. Des Weiteren ist mittels des Sperrelements 38 eine Flüssigkeit in dem Fallleitungsabschnitt 40 aufstaubar. FIG 1 shows a rail-bound vehicle 42 with a tank 12 and a suction lifting device 10. The suction lifting device 10 is set up to empty the tank 12 using gravitational force. For this purpose, the suction lifting device 10 has an emptying line 14. The drain line 14 has a downpipe section 40 with an outlet opening 18 and a riser section 48 with a suction opening 16. A blocking element 38 is arranged in the downpipe section 40. The blocking element 38 is designed as a pneumatic pinch valve. By means of the blocking element 38, a liquid flow in the emptying line 14 can be interrupted. Furthermore, a liquid can be accumulated in the downpipe section 40 by means of the blocking element 38.

FIG 1 zeigt des Weiteren die Saughebevorrichtung 10 in einer Betriebsausrichtung. Die Ansaugöffnung 16 ist hierbei oberhalb der Auslassöffnung 18 angeordnet. Mittels einer geeigneten hydrostatischen Druckdifferenz innerhalb der Saughebevorrichtung 10 kann ein Tankinhalt von der Ansaugöffnung 16 zu der Auslassöffnung 18 transportiert werden. Für den Fall, dass ein hydrostatischer Druck einer Flüssigkeit in dem Fallleitungsabschnitt 40 einen hydrostatischen Druck einer Flüssigkeit in dem Steigleitungsabschnitt 48 überschreitet, liegt die geeignete hydrostatische Druckdifferenz vor. In diesem Fall kann ein Saughebevorgang in Gang gesetzt werden. Mittels des in Gang gesetzten Saughebevorgangs kann sodann der Tank 12 entleert werden. FIG 1 further shows the suction lifting device 10 in an operating orientation. The suction opening 16 is arranged above the outlet opening 18. By means of a suitable hydrostatic pressure difference within the suction lifting device 10, a tank content can be transported from the suction opening 16 to the outlet opening 18. In the event that a hydrostatic pressure of a liquid in the downpipe section 40 exceeds a hydrostatic pressure of a liquid in the riser section 48, the appropriate hydrostatic pressure difference is present. In this case, a suction lifting process can be initiated. Means Once the suction lifting process has been initiated, the tank 12 can then be emptied.

FIG 2 zeigt die Saughebevorrichtung 10 und illustriert ein Beispiel eines Verfahrens zum Betrieb der Saughebevorrichtung 10. Zum Betrieb der Saughebevorrichtung 10 ist in dem vorliegenden Ausführungsbeispiel eine Druckquelle 28 vorgesehen, mittels welcher der Entleerleitung 14 eine verdichtete Umgebungsluft als Gasgemisch zuführbar ist. Die Druckquelle 28 ist als ein Verdichter ausgebildet. FIG 2 shows the suction lifting device 10 and illustrates an example of a method for operating the suction lifting device 10. To operate the suction lifting device 10, a pressure source 28 is provided in the present exemplary embodiment, by means of which compressed ambient air can be supplied as a gas mixture to the emptying line 14. The pressure source 28 is designed as a compressor.

In einem zwischen der Ansaugöffnung 16 und der Auslassöffnung 18 gelegenen Abschnitt der Entleerleitung 14 ist eine Belüftungsöffnung 20 angeordnet. Die Belüftungsöffnung 20 durchdringt eine Außenwandung der Entleerleitung 14. Im vorliegenden Ausführungsbeispiel ist die Belüftungsöffnung 20 oberhalb der Ansaugöffnung 16 in einem Scheitelpunkt 26 der Entleerleitung 14 angeordnet. Mittels der Belüftungsöffnung 20 ist der Entleerleitung 14 das zuvor genannte verdichtete Gasgemisch zuführbar. Des Weiteren ist eine Verschlussvorrichtung 22 vorgesehen, welche mit einer Leitung 24 verbunden ist, die in die Belüftungsöffnung 20 mündet. Die Verschlussvorrichtung 22 ist als Ventil ausgebildet, mittels welchem das genannte Zuführen des Gasgemisches unterbindbar ist. Die Verschlussvorrichtung 22 ist in der Leitung 24 zwischen der Druckquelle 28 und der Belüftungsöffnung 20 angeordnet. Für den Fall, dass die Saughebevorrichtung 10 zur Entleerung des Tanks 12 betrieben werden soll, muss die Verschlussvorrichtung 22 geschlossen sein. Für den Fall, dass ein Saughebevorgang abgebrochen werden soll, wird die Verschlussvorrichtung 22 geöffnet. Sodann ist die Verschlussvorrichtung 22 von dem verdichteten Gasgemisch durchströmbar.A ventilation opening 20 is arranged in a section of the drain line 14 located between the suction opening 16 and the outlet opening 18. The ventilation opening 20 penetrates an outer wall of the emptying line 14. In the present exemplary embodiment, the ventilation opening 20 is arranged above the suction opening 16 in a vertex 26 of the emptying line 14. By means of the ventilation opening 20, the previously mentioned compressed gas mixture can be supplied to the emptying line 14. Furthermore, a closure device 22 is provided, which is connected to a line 24 which opens into the ventilation opening 20. The closure device 22 is designed as a valve by means of which the aforementioned supply of the gas mixture can be stopped. The closure device 22 is arranged in the line 24 between the pressure source 28 and the ventilation opening 20. In the event that the suction lifting device 10 is to be operated to empty the tank 12, the closure device 22 must be closed. In the event that a suction lifting process is to be aborted, the closure device 22 is opened. The compressed gas mixture can then flow through the closure device 22.

In einem geöffneten Zustand der Verschlussvorrichtung 22 wird in dem vorliegenden Ausführungsbeispiel das verdichtete Gasgemisch durch eine Venturi-Düse 34 geleitet. Die Venturi-Düse 34 ist in der Leitung 24 in einer Strömungsrichtung des verdichteten Gasgemisches nach der Verschlussvorrichtung 22 angeordnet. Ein Ausführungsbeispiel der Venturi-Düse 34 ist in FIG 3 näher dargestellt. Die Venturi-Düse 34 weist eine Eingangsseite 44, eine Ausgangsseite 46 und ein Saugrohr 32 auf. Die Venturi-Düse 34 kann auf zwei unterschiedliche Arten betrieben werden. In einem Saugbetrieb der Venturi-Düse 34 kann das verdichtete Gasgemisch ungehindert von der Eingangsseite 44 zur Ausgangsseite 46 strömen. Aufgrund der allgemein bekannten Konstruktion der Venturi-Düse 34 wird hierdurch am Saugrohr 32 ein Unterdruck erzeugt. In dem vorliegenden Ausführungsbeispiel sind die Eingangsseite 44 und das Saugrohr 32 jeweils mit einem Abschnitt der Leitung 24 verbunden, welche in die Belüftungsöffnung 20 mündet. Das Saugrohr 32 ist somit in dem Saugbetrieb als Drucksenke 30 ausgebildet, mittels welcher der Entleerleitung 14 ein Gasgemisch entziehbar ist.In an open state of the closure device 22, the compressed gas mixture is passed through a Venturi nozzle 34 in the present exemplary embodiment. The Venturi nozzle 34 is arranged in the line 24 in a flow direction of the compressed gas mixture after the closure device 22. An embodiment of the Venturi nozzle 34 is shown in FIG 3 shown in more detail. The Venturi nozzle 34 has an inlet side 44, an outlet side 46 and a suction pipe 32. The Venturi nozzle 34 can be operated in two different ways. When the Venturi nozzle 34 is in suction mode, the compressed gas mixture can flow unhindered from the inlet side 44 to the outlet side 46. Due to the well-known construction of the Venturi nozzle 34, a negative pressure is thereby generated on the suction pipe 32. In the present exemplary embodiment, the inlet side 44 and the suction pipe 32 are each connected to a section of the line 24, which opens into the ventilation opening 20. The suction pipe 32 is thus designed in the suction mode as a pressure sink 30, by means of which a gas mixture can be removed from the emptying line 14.

Damit die Venturi-Düse 34 in einer alternativen Betriebsart betreibbar ist, nämlich in einem Umleitbetrieb, ist eine Umleitvorrichtung 36 vorgesehen. Die Umleitvorrichtung 36 ist als ein Ventil ausgebildet. Mittels der Umleitvorrichtung 36 ist das verdichtete Gasgemisch hin zu dem Saugrohr 32 umleitbar. Indem die Umleitvorrichtung 36 geschlossen wird, wird ein ungehindertes Durchströmen des verdichteten Gasgemisches von der Eingangsseite 44 zu der Ausgangsseite 46 verhindert. Das in die Eingangsseite 44 einströmende verdichtete Gasgemisch tritt im Falle der geschlossenen Umleitvorrichtung 36 zum Saugrohr 32 aus. Somit ist der Belüftungsöffnung 20 das verdichtete Gasgemisch mittels der Venturi-Düse 34 in dem Umleitbetrieb zuführbar und die Entleerleitung 14 kann mit Überdruck belüftet werden. Eine stromabwärts liegende Seite der Umleitvorrichtung 36 mündet unterhalb des Sperrelements 38 in den Fallleitungsabschnitt 40.So that the Venturi nozzle 34 can be operated in an alternative operating mode, namely in a diversion mode, a diversion device 36 is provided. The diverting device 36 is designed as a valve. By means of the diverting device 36, the compressed gas mixture can be diverted to the suction pipe 32. By closing the diverter device 36, an unhindered flow of the compressed gas mixture from the inlet side 44 to the outlet side 46 is prevented. The compressed gas mixture flowing into the inlet side 44 exits to the suction pipe 32 in the case of the closed diversion device 36. The compressed gas mixture can thus be supplied to the ventilation opening 20 by means of the Venturi nozzle 34 in the diversion mode and the drain line 14 can be ventilated with excess pressure. A downstream side of the diverting device 36 opens into the downpipe section 40 below the blocking element 38.

Anhand der FIG 2 wird illustriert, wie mittels der vorhergehend beschriebenen Saughebevorrichtung ein Saughebevorgang in Gang gesetzt werden, unterbrochen werden oder abgebrochen werden kann:
Damit ein Saughebevorgang in Gang gesetzt werden kann, muss das im Fallleitungsabschnitt 40 angeordnete Sperrelement 38 geschlossen werden. Daraufhin wird mittels der Drucksenke 30, also der Venturi-Düse 34 in einem Saugbetrieb, der Entleerleitung 14 ein Gas oder Gasgemisch entzogen. Hierbei wird aufgrund des Unterdrucks in der Entleerleitung 14 ein Tankinhalt aus dem Tank 12 durch die Ansaugöffnung 16 hindurch in den Fallleitungsabschnitt 40 befördert. Überschreitet ein hydrostatischer Druck einer Flüssigkeit in dem Fallleitungsabschnitt 40 einen hydrostatischen Druck einer Flüssigkeit in dem Steigleitungsabschnitt 48, kann das Sperrelement 38 geöffnet werden und der Saughebevorgang wird in Gang gesetzt.Based on FIG 2 Illustrates how a suction lifting process can be started, interrupted or canceled using the previously described suction lifting device:
In order for a suction lifting process to be initiated, the locking element 38 arranged in the downpipe section 40 must be activated getting closed. A gas or gas mixture is then removed from the drain line 14 by means of the pressure sink 30, i.e. the Venturi nozzle 34 in a suction mode. Due to the negative pressure in the emptying line 14, a tank contents from the tank 12 are conveyed through the suction opening 16 into the downpipe section 40. If a hydrostatic pressure of a liquid in the downpipe section 40 exceeds a hydrostatic pressure of a liquid in the riser section 48, the locking element 38 can be opened and the suction lifting process is started.

Der Saughebevorgang kann unterbrochen werden, indem das Sperrelement 38 geschlossen wird. Hierdurch wird der Flüssigkeitsstrom in der Entleerleitung 14 mit des Sperrelements 38 unterbrochen. Hiernach kann mittels Öffnen des Sperrelements 38 der unterbrochene Saughebevorgang fortgeführt werden.The suction lifting process can be interrupted by closing the locking element 38. As a result, the liquid flow in the emptying line 14 with the blocking element 38 is interrupted. The interrupted suction lifting process can then be continued by opening the locking element 38.

Damit ein Saughebevorgang abgebrochen werden kann, wird die Venturi-Düse 34 im Umleitbetrieb betrieben. Hierdurch kann die Entleerleitung 14 mittels der Belüftungsöffnung 20 belüftet werden. Im vorliegenden Ausführungsbeispiel wird die Entleerleitung 14 mit Überdruck belüftet. Der Saughebevorgang kann sowohl bei ununterbrochenem als auch bei unterbrochenem Saughebevorgang abgebrochen werden. In der Praxis hat es sich als vorteilhaft erwiesen, dass nach dem Unterbrechen des Flüssigkeitsstroms mittels des Sperrelements 38 die Entleerleitung 14 mit Überdruck belüftet wird.So that a suction lifting process can be aborted, the Venturi nozzle 34 is operated in bypass mode. As a result, the drain line 14 can be ventilated using the ventilation opening 20. In the present exemplary embodiment, the drain line 14 is ventilated with excess pressure. The suction lifting process can be canceled both during uninterrupted and interrupted suction lifting processes. In practice, it has proven to be advantageous for the drain line 14 to be ventilated with excess pressure after the liquid flow has been interrupted by means of the blocking element 38.

Claims (10)

  1. Suction lifting device (10) for emptying a tank (12), having an emptying line (14) which has an intake opening (16) and an outlet opening (18),
    wherein
    - a ventilation opening (20), by means of which a gas or gas mixture can be fed to the emptying line (14), is arranged in a section of the emptying line (14) positioned between the intake opening (16) and the outlet opening (18), and
    - a closure device (22) is provided, by means of which said feeding of the gas or the gas mixture can be prevented,
    a pressure sink (30) is provided which is designed as a suction pipe (32) of a Venturi nozzle (34), by means of which pressure sink (30) a gas or a gas mixture can be extracted from the emptying line (14), characterized in that
    a pressure source is provided, by means of which the gas or gas mixture which can be fed to the emptying line can be fed as a compressed gas or gas mixture, wherein
    - a diverting device (36) is provided, by means of which the compressed gas or gas mixture can be diverted to the suction pipe (32) of the Venturi nozzle (34), and
    - the compressed gas or gas mixture can be fed to the emptying line (14) by means of the suction pipe (32).
  2. Suction lifting device (10) according to Claim 1,
    characterized in that
    the closure device (22) is connected to a line (24) which opens into the ventilation opening (20).
  3. Suction lifting device (10) according to either of Claims 1 and 2,
    characterized in that
    the ventilation opening (20) is arranged above the intake opening (16) in an operational orientation of the suction lifting device (10).
  4. Suction lifting device (10) according to one of the preceding claims,
    characterized in that
    the ventilation opening (20) is arranged at an apex point (26) of the emptying line (14).
  5. Suction lifting device (10) according to one of the preceding claims,
    characterized in that
    a blocking element (38) is arranged in a down line section (40) of the emptying line (14).
  6. Vehicle (42) having a tank (12) and a suction lifting device (10) according to one of the preceding claims,
    characterized in that
    the intake opening (16) is arranged inside the tank (12) in the operational orientation of the suction lifting device (10) .
  7. Method for operating a suction lifting device (10) according to one of Claims 1 to 5,
    characterized in that
    a suction lifting operation is broken off by the emptying line (14) being ventilated by means of a ventilation opening (20) positioned between the intake opening (16) and the outlet opening (18).
  8. Method according to Claim 7 for operating the suction lifting device (10) according to Claim 5,
    characterized in that
    a liquid flow in the emptying line (14) is interrupted by means of the blocking element (38).
  9. Method according to Claim 8,
    characterized in that
    after said interruption of the liquid flow, the emptying line (14) is ventilated.
  10. Method according to one of Claims 7 to 9,
    characterized in that
    the emptying line (14) is ventilated with positive pressure.
EP21160918.5A 2020-03-31 2021-03-05 Suction lifting device for emptying a tank Active EP3889443B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020204177.6A DE102020204177A1 (en) 2020-03-31 2020-03-31 Suction lifting device for emptying a tank

Publications (2)

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EP3889443A1 EP3889443A1 (en) 2021-10-06
EP3889443B1 true EP3889443B1 (en) 2024-02-14

Family

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Application Number Title Priority Date Filing Date
EP21160918.5A Active EP3889443B1 (en) 2020-03-31 2021-03-05 Suction lifting device for emptying a tank

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EP (1) EP3889443B1 (en)
DE (1) DE102020204177A1 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1421844A (en) * 1914-09-14 1922-07-04 Westinghouse Electric & Mfg Co Fluid-translating device
DE1528661A1 (en) 1966-04-18 1971-03-25 Paul Bungartz Submersible pump with intermediate container for pumping liquids from storage containers via a suction line introduced above
DE2339717A1 (en) 1973-08-06 1975-02-20 Gewerkschaften Brigitta Und El TAP-FREE SULFUR DISCHARGE FROM RAILWAY TANK WAGONS
JPS5520645U (en) * 1978-07-28 1980-02-08
CN2057483U (en) * 1989-08-31 1990-05-23 郭文亮 Practical siphon type oil pumping device
JPH04330400A (en) * 1991-02-06 1992-11-18 Fujitsu Ltd Liquid discharging device
GB2289505B (en) 1994-05-18 1997-07-23 Raymond Elliott Siphon device
GB201121261D0 (en) * 2011-12-12 2012-01-18 Forbes Technologies Ltd Dip pipe assembly and method of operation
KR102007124B1 (en) * 2018-12-04 2019-08-02 김일 Water intake equipment using siphon pipe

Also Published As

Publication number Publication date
EP3889443A1 (en) 2021-10-06
DE102020204177A1 (en) 2021-09-30

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