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EP1730752B1 - Multi-chamber system serving as a liquid equalizing tank and use thereof - Google Patents

Multi-chamber system serving as a liquid equalizing tank and use thereof Download PDF

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Publication number
EP1730752B1
EP1730752B1 EP05728337.6A EP05728337A EP1730752B1 EP 1730752 B1 EP1730752 B1 EP 1730752B1 EP 05728337 A EP05728337 A EP 05728337A EP 1730752 B1 EP1730752 B1 EP 1730752B1
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EP
European Patent Office
Prior art keywords
chamber
liquid
pipeline
monitoring
gas volume
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP05728337.6A
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German (de)
French (fr)
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EP1730752A1 (en
EP1730752B8 (en
Inventor
Markus Baumann
Manfred Britting
Thomas Weike
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Mahle Industrial Thermal Systems GmbH and Co KG
Original Assignee
Siemens AG
Behr Industrieanlagen GmbH and Co KG
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Application filed by Siemens AG, Behr Industrieanlagen GmbH and Co KG filed Critical Siemens AG
Publication of EP1730752A1 publication Critical patent/EP1730752A1/en
Publication of EP1730752B1 publication Critical patent/EP1730752B1/en
Application granted granted Critical
Publication of EP1730752B8 publication Critical patent/EP1730752B8/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling

Definitions

  • liquid cooling circuits e.g. Oil circuits
  • the transformer oil expands due to the heating and is collected above the transformer via an oil line in an oil conservator, which is also partially filled with transformer oil.
  • a so-called Buchholz relay is often arranged, in the Buchholz relay the forming in the transformer gas are measured and when exceeding a predetermined gas volume, the shutdown of the transformer is triggered.
  • a large volume of gas is a common indication of a malfunction within the transformer.
  • DIN 42566 the triggering of a warning message by means of a Buchholz relay is required for the operation of an oil-cooled transformer when a given gas volume within the system is exceeded.
  • the achievement of the predetermined gas volume is detected within the Buchholz relay as a corresponding expansion vessel and gas collection container, which is connected upstream of an actual liquid expansion vessel.
  • the GB 24,117 discloses a surge tank for oil-insulated electrical machines, in particular transformers, in which produce with a gas-filled connections between different balancing chambers of the expansion tank, a hydraulic connection. As a result, in particular a contact of the oil located in the transformer should be prevented with the outside air.
  • GB 24,117 discloses the preamble of claim 1.
  • the DE 196 36 456 A1 discloses a device for foreign gas remote control of systems with temperature-variable volume, in particular electrical transformers, connected to an integrated device for isolierckenkeitstemperaturparen or - independent pressure influencing.
  • the invention described therein has an expansion vessel, that between the insulating liquid and the outside air or a gas cushion, a membrane is arranged, which prevents a direct exchange of outside air with the cooling circuit.
  • the GB318397 discloses an expansion vessel for transformers in which an elastic membrane in the expansion vessel separates the liquid surface from a gas cushion and thus prevents air exchange with the outside air.
  • a disadvantage of this prior art is that with an excessive increase in the gas volume within the transformer no shutdown mechanism is provided, since the systems described above are designed only for a completely liquid-filled cooling circuit.
  • the GB368264 describes an expansion tank for transformers in which a mutually stepped multi-chamber system prevents the outside air from entering the cooling circuit.
  • the disadvantage here however, that this system only works in a dormant Intertialsystem, since at an acceleration of the expansion vessel, the liquid columns can move against each other and thus penetration of outside air into the cooling circuit is possible.
  • the object of the present invention is to avoid the above-mentioned disadvantages in the prior art and to provide an expansion vessel that can also be operated in an accelerated system.
  • a first piping system connects the first chamber to a fluid system
  • a second piping connects the first chamber to at least one further, second chamber
  • the second piping system is arranged in the second chamber such that at existing liquid in the second chamber of the fluid pressure generated thereby also in the second piping system and the second piping system is arranged in the first chamber, that only at a complete filling of the first chamber with a liquid, the second piping system is also completely filled with a liquid and so that a hydraulic connection between the fluid system with the second chamber is formed.
  • the opening of the second pipeline system is arranged in the upper region of the first chamber.
  • a further advantage is that at least one membrane in the second chamber seals the surface of the liquid against the gas phase in the second chamber.
  • the first chamber disposed within the second chamber, wherein the chambers are rotationally symmetrical and the surface of the liquid is sealed in the second chamber by a rotationally symmetric membrane close to the gas phase in the second chamber.
  • This arrangement of the chambers makes it possible to use a single membrane, for example in the form of a ring.
  • the membrane is elastic.
  • holders on the inner wall of the second chamber fix the membrane.
  • tightly sealed guide rails on the inner wall of the second chamber guide the membrane corresponding to the liquid surface in the second chamber.
  • the cross sections and / or the heights of the piping systems are designed and designed as a function of the maximum in the first chamber with respect to the possible fluid pressure.
  • a dehumidifier reduces the moisture in the gas phase in the second chamber, so that the membrane top side is not attacked chemically-physically by moisture in the gas phase.
  • the invention provides a system for monitoring a gas volume in a liquid-filled system (9), in particular a transformer, provided that at least one multi-chamber system, a liquid system and a device for monitoring the gas volume, in particular a Buchholz relay comprises, the system via a fluid system with the device for monitoring the gas volume and the multi-chamber system is connected.
  • the multi-chamber system of the device for monitoring the volume of gas downstream.
  • a further advantage is the use of the multi-chamber system as an expansion vessel for liquid-cooled systems, in particular transformers, in a means of transport. Furthermore, it is preferable to use the system for monitoring a gas volume in a means of transport. By accelerating the means of transport a nearly leveled liquid column in the expansion vessel is not given, so that in this case considerable pressure fluctuations can occur and outside air can enter the liquid cooling system.
  • the multi-chamber system according to the invention offers the advantage that even in an accelerated system, such as e.g. a vehicle, the use of a fluid system for a transformer is possible. Furthermore, the ingress of air or gases from the outside of the system - even with accelerations - prevented.
  • FIG. 1 an inventive multi-chamber system 1 is shown.
  • the first chamber 2 is arranged in the second chamber 3 and both chambers 2, 3 are connected to one another via a second pipeline system 5.
  • a first piping system 4 is connected to a fluid system 10.
  • the first chamber 2 is completely filled with liquid, preferably with a cooling liquid, e.g. Transformer oil, filled.
  • the second piping system 5 is arranged in the first chamber 2 so that liquid can be moved between the first and second chambers 2, 3 exclusively via the upper opening of the second piping system 5, the opening being arranged closely below the upper ceiling of the first chamber 2 is. In a complete filling of the first chamber 2 with a liquid in this case, only a hydraulic connection between the second container 3 and the cooling system via the liquid system 10 is made.
  • the dehumidifier 7 serves to reduce the degree of humidity of the gas phase above the liquid surface.
  • At least one membrane 6a, 6b is furthermore provided, which seals the liquid in the second chamber 3 in a sealed and hermetic manner with respect to the gas phase.
  • the membrane 6a is fixed by means of holders 8 on the inner wall of the second chamber 3.
  • the elastic membrane 6a deforms in accordance with the liquid movements in the second chamber 3 and thus allows a liquid equalization within the multi-chamber system 1 and thus the liquid system 10 without the air or gases can get in there.
  • the diffusion of air or gases from the gas phase of the second chamber 3 is prevented in the liquid of the second chamber 3 with this multi-chamber system 1 according to the invention.
  • the dehumidifier 7 serves to reduce the degree of humidity of the gas phase above the liquid surface or above the membrane surface 6a.
  • the Fig. 2 shows a schematic representation of the system according to the invention for monitoring a gas volume in a liquid-filled plant 9, for example a transformer.
  • the resulting in the liquid-filled system 9 gases are forwarded in a fluid system 10 to a Buchholz relay 11.
  • the resulting gas volume is monitored in the Buchholz relay.
  • the multi-chamber system 1 is coupled to the fluid system as an expansion vessel.
  • the position of the multi-chamber system 1 relative to the transformer 9 or relative to the Buchholz relay 11 is arbitrary, since the pressure equalization in the second chamber 3 (not shown) with the fluid system 10 due to a hydraulic connection.
  • the system is therefore also suitable for operation in accelerated systems.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformer Cooling (AREA)
  • Drying Of Gases (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Description

Elektrische Bauteile, insbesondere Transformatoren, werden durch Flüssigkeitskühlkreisläufe, wie z.B. Ölkreisläufe, gegen thermische Überhitzung während des Betriebes geschützt. Das Transformatoröl dehnt sich aufgrund der Erwärmung aus und wird oberhalb des Transformators über eine Ölleitung in einem Ölausdehnungsgefäß aufgefangen, das teilweise ebenfalls mit Transformatoröl gefüllt ist. In der Ölleitung zwischen dem Ölausdehnungsgefäß und den Transformator ist oft ein so genanntes Buchholzrelais angeordnet, wobei im Buchholzrelais die sich im Transformator bildenden Gas gemessen werden und bei Überschreitung eines vorgegebenen Gasvolumen die Abschaltung des Transformators ausgelöst wird. Ein großes Gasvolumen ist ein häufiges Indiz für eine Fehlfunktion innerhalb des Transformators. Nach der deutschen Industrienorm DIN 42566 ist für den Betrieb eines ölgekühlten Transformators bei dem Überschreiten eines vorgegebenen Gasvolumens innerhalb der Anlage die Auslösung einer Warnmeldung mittels eines Buchholzrelais vorgeschrieben. Das Erreichen des vorgegebenen Gasvolumens wird dabei innerhalb des Buchholzrelais als entsprechendes Ausdehnungsgefäß und Gassammelbehälter detektiert, der einem eigentlichen Flüssigkeitsausdehnungsgefäß vorgeschaltet ist.Electrical components, in particular transformers, are replaced by liquid cooling circuits, e.g. Oil circuits, protected against thermal overheating during operation. The transformer oil expands due to the heating and is collected above the transformer via an oil line in an oil conservator, which is also partially filled with transformer oil. In the oil line between the oil conservator and the transformer, a so-called Buchholz relay is often arranged, in the Buchholz relay the forming in the transformer gas are measured and when exceeding a predetermined gas volume, the shutdown of the transformer is triggered. A large volume of gas is a common indication of a malfunction within the transformer. According to the German industrial standard DIN 42566, the triggering of a warning message by means of a Buchholz relay is required for the operation of an oil-cooled transformer when a given gas volume within the system is exceeded. The achievement of the predetermined gas volume is detected within the Buchholz relay as a corresponding expansion vessel and gas collection container, which is connected upstream of an actual liquid expansion vessel.

In den bekannten Systemen wird weiterhin durch eine Entlüftungsöffnung im Ölausdehnungsgefäß beim Abkühlen des Transformatoröls Luft aus der Umgebung angesaugt und die in der Umgebungsluft befindliche Feuchtigkeit mittels eines Luftentfeuchters reduziert. Das Eindringen von Luft/Feuchtigkeit in den Kühlkreislauf ist auf alle Fälle zu vermeiden, da hierdurch die Durchschlagsfestigkeit des Transformators stark reduziert wird.In the known systems, air is further drawn in from the environment through a vent opening in the oil conservator during cooling of the transformer oil and the moisture contained in the ambient air is reduced by means of an air dehumidifier. The intrusion of Air / moisture in the cooling circuit should be avoided at all costs, as this greatly reduces the dielectric strength of the transformer.

Die GB 24,117 offenbart ein Ausgleichsgefäß für ölisolierte elektrische Maschinen, insbesondere Transformatoren, bei dem mit einem Gas gefüllte Verbindungen zwischen unterschiedlichen Ausgleichskammern des Ausgleichsgefäßes eine hydraulische Verbindung erzeugen. Hierdurch solle insbesondere ein Kontakt des im Transformator befindlichen Öles mit der Außenluft verhindert werden.The GB 24,117 discloses a surge tank for oil-insulated electrical machines, in particular transformers, in which produce with a gas-filled connections between different balancing chambers of the expansion tank, a hydraulic connection. As a result, in particular a contact of the oil located in the transformer should be prevented with the outside air.

GB 24,117 offenbart den Oberbegriff des Anspruchs 1. GB 24,117 discloses the preamble of claim 1.

Die DE 196 36 456 A1 offenbart eine Vorrichtung zur Fremdgasfernhaltung von Systemen mit temperaturbegingt veränderlichen Volumen, insbesondere elektrische Transformatoren, verbunden mit einer integrierten Vorrichtung zur isolierflüssigkeitstemperaturabhängigen oder - unabhängigen Druckbeeinflussung. Die dort beschriebene Erfindung besitzt ein Ausdehnungsgefäß, dass zwischen der Isolierflüssigkeit und der Außenluft bzw. einem Gaspolster eine Membran angeordnet ist, die einen direkten Austausch der Außenluft mit dem Kühlkreislauf verhindert.The DE 196 36 456 A1 discloses a device for foreign gas remote control of systems with temperature-variable volume, in particular electrical transformers, connected to an integrated device for isolierflüssigkeitstemperaturabhängigen or - independent pressure influencing. The invention described therein has an expansion vessel, that between the insulating liquid and the outside air or a gas cushion, a membrane is arranged, which prevents a direct exchange of outside air with the cooling circuit.

Die GB318397 offenbart ein Ausdehnungsgefäß für Transformatoren bei dem eine elastische Membran in dem Ausdehnungsgefäß die Flüssigkeitsoberfläche gegenüber einem Gaspolster trennt und damit einen Luftaustausch mit der Außenluft verhindert.The GB318397 discloses an expansion vessel for transformers in which an elastic membrane in the expansion vessel separates the liquid surface from a gas cushion and thus prevents air exchange with the outside air.

Nachteilig bei diesem Stand der Technik ist, dass bei einem übermäßigen Anstieg des Gasvolumens innerhalb des Transformators kein Abschaltemechanismus vorgesehen ist, da die oben beschriebenen Systeme nur für einen vollständig flüssigkeitsgefüllten Kühlkreislauf konzipiert sind.A disadvantage of this prior art is that with an excessive increase in the gas volume within the transformer no shutdown mechanism is provided, since the systems described above are designed only for a completely liquid-filled cooling circuit.

Die GB368264 beschreibt ein Ausdehnungsgefäß für Transformatoren, bei denen ein gegeneinander abgestuftes Mehrkammersystem ein Eindingen der Außenluft in den Kühlkreislauf verhindert. Nachteilig ist hierbei jedoch, dass dieses System nur in einem ruhenden Intertialsystem funktioniert, da bei einer Beschleunigung des Ausdehnungsgefäßes die Flüssigkeitssäulen sich gegeneinander bewegen können und damit ein Eindringen von Außenluft in den Kühlkreislauf möglich ist.The GB368264 describes an expansion tank for transformers in which a mutually stepped multi-chamber system prevents the outside air from entering the cooling circuit. The disadvantage here, however, that this system only works in a dormant Intertialsystem, since at an acceleration of the expansion vessel, the liquid columns can move against each other and thus penetration of outside air into the cooling circuit is possible.

Aufgabe der vorliegenden Erfindung ist es, die oben genannten Nachteile im Stand der Technik zu vermeiden und ein Ausdehnungsgefäß bereitzustellen, dass auch in einem beschleunigten System betrieben werden kann.The object of the present invention is to avoid the above-mentioned disadvantages in the prior art and to provide an expansion vessel that can also be operated in an accelerated system.

Gelöst wird die Aufgabe durch die im Anspruch 1 beschriebene Erfindung. Erfindungsgemäß ist dabei vorgesehen dass in einer ersten Kammer ein erstes Rohrleitungssystem die erste Kammer mit einer Flüssigkeitssystem verbindet, sowie ein zweites Rohrleitungssystem die erste Kammer mit mindestens einer weiteren, zweiten Kammer verbindet, wobei das zweite Rohrleitungssystem in der zweiten Kammer so angeordnet ist, dass bei vorhandener Flüssigkeit in der zweiten Kammer der hierdurch erzeugte Flüssigkeitsdruck ebenfalls im zweiten Rohrleitungssystem vorhanden und das zweite Rohrleitungssystem so in der ersten Kammer angeordnet ist, dass erst bei einer vollständigen Befüllung der ersten Kammer mit einer Flüssigkeit das zweite Rohrleitungssystem ebenfalls vollständig mit einer Flüssigkeit befüllt ist und damit eine hydraulische Verbindung zwischen der Flüssigkeitssystem mit der zweiten Kammer entsteht. Bei einer vollständigen Befüllung des ersten Rohleitungssystems wird in diesem Falle ebenfalls das Eindringen von Außenluft oder Gasen über die zweite Kammer in die Flüssigkeitssystem verhindert. Vorteilhafterweise ist die Öffnung des zweites Rohrleitungssystems im oberen Bereich der ersten Kammer angeordnet.The problem is solved by the invention described in claim 1. According to the invention, it is provided that in a first chamber a first piping system connects the first chamber to a fluid system, and a second piping connects the first chamber to at least one further, second chamber, wherein the second piping system is arranged in the second chamber such that at existing liquid in the second chamber of the fluid pressure generated thereby also in the second piping system and the second piping system is arranged in the first chamber, that only at a complete filling of the first chamber with a liquid, the second piping system is also completely filled with a liquid and so that a hydraulic connection between the fluid system with the second chamber is formed. In a complete filling of the first piping system in this case also the penetration of outside air or gases through the second chamber is prevented in the liquid system. Advantageously, the opening of the second pipeline system is arranged in the upper region of the first chamber.

Vorteilhaft ist weiterhin, dass mindestens eine Membran in der zweiten Kammer die Oberfläche der Flüssigkeit gegenüber der Gasphase in der zweiten Kammer dicht abschließt. Nach einer weiter bevorzugten Ausführungsform ist die erste Kammer innerhalb der zweite Kammer angeordnet, wobei die Kammern rotationssymmetrisch sind und die Oberfläche der Flüssigkeit in der zweiten Kammer durch eine rotationssymmetrische Membran dicht gegenüber der Gasphase in der zweiten Kammer abgeschlossen wird. Durch diese Anordnung der Kammern lässt sich eine einzige Membran, z.B. in Form eines Ringes, verwenden. Bevorzugt ist die Membran elastisch.A further advantage is that at least one membrane in the second chamber seals the surface of the liquid against the gas phase in the second chamber. According to a further preferred embodiment, the first chamber disposed within the second chamber, wherein the chambers are rotationally symmetrical and the surface of the liquid is sealed in the second chamber by a rotationally symmetric membrane close to the gas phase in the second chamber. This arrangement of the chambers makes it possible to use a single membrane, for example in the form of a ring. Preferably, the membrane is elastic.

Vorteilhafterweise fixieren Halterungen an der Innenwand der zweiten Kammer die Membran. Alternativ führen dicht abschließende Führungsschienen an der Innenwand der zweiten Kammer die Membran korrespondierend zur Flüssigkeitsoberfläche in der zweiten Kammer. Bei dieser Anordnung wird die mechanische Belastung der Membran im Vergleich zu einer starren Fixierung reduziert.Advantageously, holders on the inner wall of the second chamber fix the membrane. Alternatively, tightly sealed guide rails on the inner wall of the second chamber guide the membrane corresponding to the liquid surface in the second chamber. With this arrangement, the mechanical stress of the membrane is reduced compared to a rigid fixation.

Bevorzugt sind die Querschnitte und/oder die Höhen der Rohrleitungssysteme in Abhängigkeit vom maximal in der ersten Kammer bezüglich des möglichen Flüssigkeitsdruck konzipiert und ausgelegt. Ein Luftentfeuchter reduziert die Feuchtigkeit in der Gasphase in der zweiten Kammer, damit die Membranoberseite nicht durch Feuchtigkeiten in der Gasphase chemisch-physikalisch angegriffen wird.Preferably, the cross sections and / or the heights of the piping systems are designed and designed as a function of the maximum in the first chamber with respect to the possible fluid pressure. A dehumidifier reduces the moisture in the gas phase in the second chamber, so that the membrane top side is not attacked chemically-physically by moisture in the gas phase.

Weiterhin ist erfindungsgemäß ein System zur Überwachung eines Gasvolumens in einer flüssigkeitsbefüllten Anlage (9), insbesondere ein Transformator, vorgesehen, dass mindestens ein Mehrkammersystem, eine Flüssigkeitssystem und eine Vorrichtung zur Überwachung des Gasvolumens, insbesondere ein Buchholzrelais umfasst, wobei die Anlage über eine Flüssigkeitssystem mit der Vorrichtung zur Überwachung des Gasvolumens und dem Mehrkammersystem verbunden ist. Nach einer bevorzugten Ausführung ist das Mehrkammersystem der Vorrichtung zur Überwachung des Gasvolumens nachgeordnet.Furthermore, the invention provides a system for monitoring a gas volume in a liquid-filled system (9), in particular a transformer, provided that at least one multi-chamber system, a liquid system and a device for monitoring the gas volume, in particular a Buchholz relay comprises, the system via a fluid system with the device for monitoring the gas volume and the multi-chamber system is connected. According to a preferred embodiment the multi-chamber system of the device for monitoring the volume of gas downstream.

Vorteilhaft ist weiterhin die Verwendung des Mehrkammernsystems als Ausdehnungsgefäß für flüssigkeitsgekühlte Anlagen, insbesondere Transformatoren, in einem Transportmittel. Weiterhin ist bevorzugt die Verwendung des Systems zur Überwachung eines Gasvolumens nach in einem Transportmittel. Durch Beschleunigungen des Transportmittels ist eine nahezu ausnivellierte Flüssigkeitssäule im Ausdehnungsgefäß nicht gegeben, so dass hierbei erhebliche Druckschwankungen auftreten können und auch Außenluft in das Flüssigkeitskühlungssystem eintreten kann. Das erfindungsgemäßen Mehrkammersystems bietet den Vorteil, dass auch in beschleunigten System, wie z.B. einem Fahrzeug, die Verwendung eines Flüssigkeitssystems für einen Transformator möglich ist. Weiterhin wird das Eindringen von Luft oder Gasen aus dem Außenbereich des Systems - auch bei Beschleunigungen - verhindert.A further advantage is the use of the multi-chamber system as an expansion vessel for liquid-cooled systems, in particular transformers, in a means of transport. Furthermore, it is preferable to use the system for monitoring a gas volume in a means of transport. By accelerating the means of transport a nearly leveled liquid column in the expansion vessel is not given, so that in this case considerable pressure fluctuations can occur and outside air can enter the liquid cooling system. The multi-chamber system according to the invention offers the advantage that even in an accelerated system, such as e.g. a vehicle, the use of a fluid system for a transformer is possible. Furthermore, the ingress of air or gases from the outside of the system - even with accelerations - prevented.

Weitere vorteilhafte Maßnahmen sind in den übrigen Unteransprüchen beschrieben; die Erfindung wird anhand von Ausführungsbeispielen und den nachfolgenden Figuren näher beschrieben und es zeigt:

Fig. 1
eine schematische Darstellung des erfindungsgemäßen Mehrkammersystem;
Fig. 2
eine schematische Darstellung des erfindungsgemäßen System zur Überwachung eines Gasvolumens in einer mit einer flüssigkeitsbefüllten Anlage.
Further advantageous measures are described in the remaining subclaims; The invention will be described in more detail by means of exemplary embodiments and the following figures, which show:
Fig. 1
a schematic representation of the multi-chamber system according to the invention;
Fig. 2
a schematic representation of the system according to the invention for monitoring a gas volume in a liquid-filled plant.

In der Fig. 1 ist ein erfindungsgemäßes Mehrkammersystem 1 dargestellt.In the Fig. 1 an inventive multi-chamber system 1 is shown.

Die erste Kammer 2 ist in der zweiten Kammer 3 angeordnet und beiden Kammer 2,3 sind über ein zweites Rohleitungssystem 5 miteinander verbunden. Ein erstes Rohrleitungssystem 4 ist an ein Flüssigkeitssystem 10 angeschlossen. Die erste Kammer 2 ist vollständig mit Flüssigkeit, vorzugsweise mit einer Kühlflüssigkeit, wie z.B. Transformatoröl, befüllt. Das zweite Rohrleitungssystem 5 ist in der ersten Kammer 2 so angeordnet, das ausschließlich über die obere Öffnung des zweiten Rohrleitungssystems 5 Flüssigkeit zwischen der ersten und zweiten Kammer 2,3 bewegt werden kann, wobei die Öffnung dicht unterhalb der oberen Decke der ersten Kammer 2 angeordnet ist. Bei einer vollständigen Befüllung der ersten Kammer 2 mit einer Flüssigkeit wird in diesem Falle erst eine hydraulische Verbindung zwischen dem zweiten Behälter 3 und dem Kühlsystem über das Flüssigkeitssystem 10 hergestellt. Durch diesen Aufbau wird weiterhin verhindert, dass Luft bzw. Gase in der zweiten Kammer 3 über das zweite Rohrleitungssystem 5 in die erste Kammer 2 und anschließend über das erste Rohrleitungssystem 4 in das Flüssigkeitssystem 10 gelangen können. Der Luftentfeuchter 7 dient dazu den Feuchtigkeitsgrad der Gasphase oberhalb der Flüssigkeitsoberfläche zu reduzieren.The first chamber 2 is arranged in the second chamber 3 and both chambers 2, 3 are connected to one another via a second pipeline system 5. A first piping system 4 is connected to a fluid system 10. The first chamber 2 is completely filled with liquid, preferably with a cooling liquid, e.g. Transformer oil, filled. The second piping system 5 is arranged in the first chamber 2 so that liquid can be moved between the first and second chambers 2, 3 exclusively via the upper opening of the second piping system 5, the opening being arranged closely below the upper ceiling of the first chamber 2 is. In a complete filling of the first chamber 2 with a liquid in this case, only a hydraulic connection between the second container 3 and the cooling system via the liquid system 10 is made. As a result of this construction, it is further prevented that air or gases in the second chamber 3 can reach the first chamber 2 via the second pipeline system 5 and then into the liquid system 10 via the first pipeline system 4. The dehumidifier 7 serves to reduce the degree of humidity of the gas phase above the liquid surface.

Erfindungsgemäß ist weiterhin mindestens eine Membran 6a,6b vorgesehen, die in der zweiten Kammer 3 die Flüssigkeit dicht und hermetisch gegenüber der Gasphase abdichtet. Die Membran 6a ist mittels Halterungen 8 an der Innenwand der zweiten Kammer 3 fixiert. Dadurch ist ein Eindringen von Luft bzw. Gasen in das Mehrkammersystem 1 und damit das Flüssigkeitssystem 10 ausgeschlossen, selbst wenn aufgrund äußerer Einflüsse die Flüssigkeitssäulen in den Rohrleitungssystemen "abreißen" und Luft bzw. Gase in das System eindringen könnten. In diesem Falle deformiert sich die elastische Membran 6a entsprechend der Flüssigkeitsbewegungen in der zweiten Kammer 3 mit und ermöglicht damit einen Flüssigkeitsausgleich innerhalb des Mehrkammersystems 1 und damit des Flüssigkeitssystems 10 ohne das Luft bzw. Gase hineingelangen können. Weiterhin ist mit diesem erfindungsgemäßen Mehrkammersystem 1 die Diffusion von Luft bzw. Gasen aus der Gasphase der zweiten Kammer 3 in die Flüssigkeit der zweiten Kammer 3 unterbunden.According to the invention, at least one membrane 6a, 6b is furthermore provided, which seals the liquid in the second chamber 3 in a sealed and hermetic manner with respect to the gas phase. The membrane 6a is fixed by means of holders 8 on the inner wall of the second chamber 3. As a result, an ingress of air or gases in the multi-chamber system 1 and thus the liquid system 10 is excluded, even if due external influences, the liquid columns in the piping systems "tear off" and air or gases could penetrate into the system. In this case, the elastic membrane 6a deforms in accordance with the liquid movements in the second chamber 3 and thus allows a liquid equalization within the multi-chamber system 1 and thus the liquid system 10 without the air or gases can get in there. Furthermore, the diffusion of air or gases from the gas phase of the second chamber 3 is prevented in the liquid of the second chamber 3 with this multi-chamber system 1 according to the invention.

Der Luftentfeuchter 7 dient dazu den Feuchtigkeitsgrad der Gasphase oberhalb der Flüssigkeitsoberfläche bzw. oberhalb der Membranoberfläche 6a zu reduzieren.The dehumidifier 7 serves to reduce the degree of humidity of the gas phase above the liquid surface or above the membrane surface 6a.

Die Fig. 2 zeigt eine schematische Darstellung des erfindungsgemäßen System zur Überwachung eines Gasvolumens in einer mit einer flüssigkeitsbefüllten Anlage 9, z.B. einen Transformator. Die in der flüssigkeitsbefüllten Anlage 9 entstehenden Gase werden in einem Flüssigkeitssystem 10 an ein Buchholzrelais 11 weitergeleitet. Im Buchholzrelais wird das entstandenen Gasvolumen überwacht. Weiterhin ist an das Flüssigkeitssystem das Mehrkammersystem 1 als Ausdehnungsgefäß gekoppelt. Die Position des Mehrkammersystems 1 relativ zum Transformator 9 bzw. relativ zum Buchholzrelais 11 ist frei wählbar, da der Druckausgleich in der zweiten Kammer 3 (nicht dargestellt) mit dem Flüssigkeitssystem 10 aufgrund einer hydraulischen Verbindung erfolgt. Das Systems ist daher auch zum Betrieb in beschleunigten Systemen geeignet.The Fig. 2 shows a schematic representation of the system according to the invention for monitoring a gas volume in a liquid-filled plant 9, for example a transformer. The resulting in the liquid-filled system 9 gases are forwarded in a fluid system 10 to a Buchholz relay 11. The resulting gas volume is monitored in the Buchholz relay. Furthermore, the multi-chamber system 1 is coupled to the fluid system as an expansion vessel. The position of the multi-chamber system 1 relative to the transformer 9 or relative to the Buchholz relay 11 is arbitrary, since the pressure equalization in the second chamber 3 (not shown) with the fluid system 10 due to a hydraulic connection. The system is therefore also suitable for operation in accelerated systems.

Bezugzeichenreference numeral

1.1.
MehrkammersystemMulti-chamber system
2.Second
erste Kammerfirst chamber
3.Third
zweite Kammersecond chamber
4.4th
erstes Rohrleitungssystemfirst piping system
5.5th
zweites Rohrleitungssystemsecond piping system
6.a.,6.b.6.a, 6.b.
Membranmembrane
7.7th
LuftentfeuchterDehumidifiers
8.8th.
Membranhalterungmembrane holder
9.9th
Flüssigkeitsbefüllte AnlageLiquid-filled plant
10.10th
Flüssigkeitssystemfluid system
11.11th
Vorrichtung zur Überwachung eines GasvolumensDevice for monitoring a gas volume
12.12th
Gasphase in der zweiten KammerGas phase in the second chamber

Claims (11)

  1. Multi-chamber system (1) as a liquid expansion tank, wherein, in a first chamber (2), a first pipeline system (4) connects the first chamber (2) to a liquid system (10), and a second pipeline system (5) connects the first chamber (2) to at least one further, second chamber (3), characterized in that the second pipeline system (5) is arranged in the second chamber (3) in such a way that, when liquid is present in the second chamber (3), the liquid pressure generated as a result is likewise present in the second pipeline system (5), and the second pipeline system (5) is arranged in the first chamber (2) in such a way that the second pipeline system (5) is likewise completely filled with a liquid, and therefore a liquid exchange is possible within the multi-chamber system (1) and thus the liquid system (10), and a hydraulic connection is thus produced between the liquid system (10) and the second chamber (3), only when the first chamber (2) is completely filled with a liquid, wherein at least one diaphragm (6a) in the second chamber (3) sealingly closes off the surface of the liquid from the gas phase in the second chamber (3).
  2. Multi-chamber system (1) according to Claim 1, characterized in that the opening of the second pipeline system (5) is arranged in the upper region of the first chamber (2).
  3. Multi-chamber system (1) according to Claim 2, characterized in that the first chamber (2) is arranged within the second chamber (3), the chambers (2, 3) being rotationally symmetrical, and the surface of the liquid in the second chamber (3) being sealingly closed off from the gas phase in the second chamber (3) by means of a rotationally symmetrical diaphragm (6a).
  4. Multi-chamber system (1) according to one of Claims 2 or 3, characterized in that the diaphragm (6a) is elastic.
  5. Multi-chamber system (1) according to one of Claims 2 to 4, characterized in that brackets (8) on the inner wall of the second chamber (3) fix the diaphragm (6a), or guide rails, which provide sealing closure, on the inner wall of the second chamber (3) guide the diaphragm (6a) corresponding to the liquid surface in the second chamber (3).
  6. Multi-chamber system (1) according to one of Claims 1 to 5, characterized in that the cross sections and/or the heights of the pipeline systems (4, 5) are designed as a function of the maximum possible liquid pressure in the first chamber (2).
  7. Multi-chamber system (1) according to one of Claims 1 to 6, characterized in that an air dehumidifier (7) reduces the moisture in the gas phase (12) in the second chamber (3).
  8. System for monitoring a gas volume in a liquid-filled installation (9), in particular a transformer, comprising at least one multi-chamber system (1) according to one of Claims 1 to 7, a liquid system (10) and a device (11) for monitoring the gas volume, in particular a Buchholz relay, the installation (9) being connected via a liquid system (10) to the device (11) for monitoring the gas volume and to the multi-chamber system (1).
  9. System according to Claim 8, characterized in that the multi-chamber system (1) is arranged downstream of the device (11) for monitoring the gas volume.
  10. Use of the multi-chamber system (1) according to one of Claims 1 to 7 as an expansion tank for liquid-cooled installations (9), in particular transformers, in a means of transport.
  11. Use of the system for monitoring a gas volume according to one of Claims 8 or 9 in a means of transport.
EP05728337.6A 2004-03-31 2005-03-18 Multi-chamber system serving as a liquid equalizing tank and use thereof Not-in-force EP1730752B8 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004016583A DE102004016583B3 (en) 2004-03-31 2004-03-31 Multi-chamber system as a liquid equalization vessel and their use
PCT/DE2005/000518 WO2005096329A1 (en) 2004-03-31 2005-03-18 Multi-chamber system serving as a liquid equalizing tank and use thereof

Publications (3)

Publication Number Publication Date
EP1730752A1 EP1730752A1 (en) 2006-12-13
EP1730752B1 true EP1730752B1 (en) 2016-08-31
EP1730752B8 EP1730752B8 (en) 2016-10-05

Family

ID=34964363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05728337.6A Not-in-force EP1730752B8 (en) 2004-03-31 2005-03-18 Multi-chamber system serving as a liquid equalizing tank and use thereof

Country Status (6)

Country Link
US (1) US20070241115A1 (en)
EP (1) EP1730752B8 (en)
JP (1) JP4335943B2 (en)
CN (1) CN101048829B (en)
DE (1) DE102004016583B3 (en)
WO (1) WO2005096329A1 (en)

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DE102018207847A1 (en) * 2018-05-18 2019-11-21 Siemens Aktiengesellschaft vehicle transformer
CN109555857A (en) * 2018-12-29 2019-04-02 昆山瑞普电气有限公司 Sealed expansion structure in transformer oil
DE102020205660A1 (en) * 2020-05-05 2021-11-11 Deere & Company Fuel tank for a vehicle
DE102023101364A1 (en) 2023-01-20 2024-07-25 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Expansion tank device, cooling circuit and vehicle

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Also Published As

Publication number Publication date
US20070241115A1 (en) 2007-10-18
CN101048829A (en) 2007-10-03
EP1730752A1 (en) 2006-12-13
DE102004016583B3 (en) 2006-03-09
JP4335943B2 (en) 2009-09-30
JP2007531291A (en) 2007-11-01
WO2005096329A1 (en) 2005-10-13
EP1730752B8 (en) 2016-10-05
CN101048829B (en) 2010-06-23

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