EP1730752A1 - 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

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Publication number
EP1730752A1
EP1730752A1 EP05728337A EP05728337A EP1730752A1 EP 1730752 A1 EP1730752 A1 EP 1730752A1 EP 05728337 A EP05728337 A EP 05728337A EP 05728337 A EP05728337 A EP 05728337A EP 1730752 A1 EP1730752 A1 EP 1730752A1
Authority
EP
European Patent Office
Prior art keywords
chamber
liquid
membrane
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.)
Granted
Application number
EP05728337A
Other languages
German (de)
French (fr)
Other versions
EP1730752B1 (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
Siemens Corp
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Publication date
Application filed by Siemens AG, Behr Industrieanlagen GmbH and Co KG, Siemens Corp 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
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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

  • Multi-chamber system as a liquid expansion tank and its use
  • 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 expansion tank, which is also partly filled with transformer oil.
  • a so-called Buchholz relay is often arranged in the oil line between the oil expansion vessel and the transformer, the gas forming in the transformer being measured in the Buchholz relay and the transformer being switched off when a predetermined gas volume is exceeded.
  • a large volume of gas is a common indicator of a malfunction within the transformer.
  • DIN 42566 the operation of an oil-cooled transformer when a given gas volume within the system is exceeded requires the triggering of a warning by means of a Buchholz relay. Reaching the specified gas volume is detected within the Buchholz relay as a corresponding expansion tank and gas collection tank, which is connected upstream of an actual liquid expansion tank.
  • DE 196 36 456 AI discloses a device for keeping foreign gas away from systems with variable volumes due to temperature, in particular electrical transformers, connected to an integrated device for insulating liquid temperature-dependent or independent pressure control.
  • the invention described there has an expansion vessel that a membrane is arranged between the insulating liquid and the outside air or a gas cushion, which prevents a direct exchange of the outside air with the cooling circuit.
  • 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 if the gas volume inside the transformer rises excessively, no switch-off mechanism is provided, since the systems described above are only designed for a completely liquid-filled cooling circuit.
  • GB368264 describes an expansion vessel for transformers in which a multi-chamber system that is graduated against each other prevents outside air from entering the cooling circuit.
  • the disadvantage here is that this system only works in a stationary inertial system, since when the expansion vessel is accelerated, the liquid columns can move against each other, thus permitting outside air to enter the cooling circuit.
  • the object of the present invention is to avoid the above-mentioned disadvantages in the prior art and to provide an expansion vessel which can also be operated in an accelerated system.
  • a first pipeline system connects the first chamber with a liquid system
  • a second pipeline system connects the first chamber with at least one further, second chamber
  • the second pipeline system being arranged in the second chamber so that at existing liquid in the second chamber, the liquid pressure generated thereby also exists in the second pipeline system and the second pipeline system is arranged in the first chamber such that the second pipeline system is also completely filled with a liquid only when the first chamber is completely filled with a liquid and thus creating a hydraulic connection between the fluid system and the second chamber.
  • the opening of the second pipeline system is advantageously arranged in the upper region of the first chamber.
  • At least one membrane in the second chamber seals off the surface of the liquid from the gas phase in the second chamber.
  • the first chamber arranged within the second chamber, the chambers being rotationally symmetrical and the surface of the liquid in the second chamber being sealed off from the gas phase in the second chamber by a rotationally symmetrical membrane.
  • This arrangement of the chambers enables a single membrane, for example in the form of a ring, to be used.
  • the membrane is preferably elastic.
  • Brackets advantageously fix the membrane to the inner wall of the second chamber.
  • sealing 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 pipeline systems are preferably designed and designed as a function of the maximum in the first chamber with regard to the possible liquid pressure.
  • An air dehumidifier reduces the moisture in the gas phase in the second chamber so that the membrane top is not chemically and physically attacked by moisture in the gas phase.
  • a system for monitoring a gas volume in a liquid-based system (9), in particular a transformer includes at least one multi-chamber system, a liquid system and a device for monitoring the gas volume, in particular a Buchholz relay u, the system using a liquid system is connected to the device for monitoring the gas volume and the multi-chamber system.
  • the multi-chamber system downstream of the device for monitoring the gas volume.
  • the multi-chamber system is also advantageous to use as an expansion vessel for liquid-cooled systems, in particular transformers, in a means of transport. It is also preferred to use the system to monitor a gas volume in a means of transport. Due to accelerations of the means of transport, an almost leveled liquid column in the expansion vessel is not given, so that considerable pressure fluctuations can occur and outside air can also enter the liquid cooling system.
  • the multi-chamber system according to the invention has the advantage that even in accelerated systems, such as a vehicle, the use of a liquid system for a transformer is possible. In addition, the ingress of air or gases from the outside of the system - even during accelerations - is prevented.
  • Fig. 1 is a schematic representation of the multi-chamber system according to the invention.
  • FIG. 2 shows a schematic representation of the system according to the invention for monitoring a gas volume in a system with a liquid-dependent system.
  • 1 shows a multi-chamber system 1 according to the invention.
  • the first chamber 2 is arranged in the second chamber 3 and the two chambers 2, 3 are connected to one another via a second pipe system 5.
  • a first pipeline system 4 is connected to a liquid 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 in such a way that liquid can only be moved between the first and second chambers 2, 3 via the upper opening of the second piping system 5, the opening being arranged just below the upper ceiling of the first chamber 2 is.
  • a hydraulic connection between the second container 3 and the cooling system is first established via the liquid system 10 in this case.
  • This construction also prevents air or gases in the second chamber 3 from entering the first chamber 2 via the second pipeline system 5 and then entering the liquid system 10 via the first pipeline system 4.
  • the dehumidifier 7 serves to reduce the degree of moisture in the gas phase above the liquid surface.
  • At least one membrane 6a, 6b is also provided, which tightly and hermetically seals the liquid in the second chamber 3 with respect to the gas phase.
  • the membrane 6a is fixed to the inner wall of the second chamber 3 by means of brackets 8. This prevents air or gases from entering the multi-chamber system 1 and thus the liquid system 10, even if due to External influences could "tear off” the liquid columns in the pipeline systems and air or gases could penetrate into the system.
  • the elastic membrane 6a deforms in accordance with the liquid movements in the second chamber 3 and thus enables liquid compensation within the multi-chamber system 1 and thus of the liquid system 10 without which air or gases can get in.
  • this multi-chamber system 1 according to the invention, the diffusion of air or gases from the gas phase of the second chamber 3 into the liquid of the second chamber 3 is prevented.
  • the dehumidifier 7 serves to reduce the degree of moisture in the gas phase above the liquid surface or above the membrane surface 6a.
  • FIG. 2 shows a schematic illustration of the system according to the invention for monitoring a gas volume in a system 9, for example a transformer, with a liquid-dependent system.
  • the gases generated in the liquid-dependent system 9 are passed on to a Buchholz relay 11 in a liquid system 10.
  • the gas volume generated is monitored in the Buchholz relay.
  • the multi-chamber system 1 is coupled to the liquid 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 can be freely selected, since the pressure equalization in the second chamber 3 (not shown) with the liquid system 10 takes place due to a hydraulic connection.
  • the system is therefore also suitable for operation in accelerated systems.

Landscapes

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

Abstract

The invention relates to a multi-chamber system serving as a liquid equalizing tank and to the use thereof. In the inventive multi-chamber system, a liquid expansion tank is provided due to the arrangement of the chambers and pipe systems whereby preventing external gases from entering the liquid system and enabling it to also be used in accelerated systems, such as a vehicle since no leveled out liquid columns are used. This makes it possible to provide a system for monitoring a volume of gas in a liquid-filled installation that, in addition to the multi-chamber system, also contains a Buchholz relay in the cooling liquid system. The use of this system for monitoring a volume of gas is thus suitable for means of transportation.

Description

Beschreibungdescription

Mehrkammersystem als Flüssigkeitsausgleichsgefäß und deren VerwendungMulti-chamber system as a liquid expansion tank and its use

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, especially 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 expansion tank, which is also partly filled with transformer oil. A so-called Buchholz relay is often arranged in the oil line between the oil expansion vessel and the transformer, the gas forming in the transformer being measured in the Buchholz relay and the transformer being switched off when a predetermined gas volume is exceeded. A large volume of gas is a common indicator of a malfunction within the transformer. According to the German industry standard DIN 42566, the operation of an oil-cooled transformer when a given gas volume within the system is exceeded requires the triggering of a warning by means of a Buchholz relay. Reaching the specified gas volume is detected within the Buchholz relay as a corresponding expansion tank and gas collection tank, which is connected upstream of an actual liquid expansion tank.

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 also sucked in from the environment through a ventilation opening in the oil expansion vessel when the transformer oil cools, and the moisture in the ambient air is reduced by means of a dehumidifier. The intrusion of Air / moisture in the cooling circuit must be avoided in any case, as this greatly reduces the dielectric strength of the transformer.

Die DE 196 36 456 AI offenbart eine Vorrichtung zur Fremdgasfernhaltung von Systemen mit temperaturbegingt veränderlichen Volumen, insbesondere elektrische Transformatoren, verbunden mit einer integrierten Vorrichtung zur isolierflüssigkeitstemperaturabhängigen oder unabhängigen Druckbeein lussung. 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.DE 196 36 456 AI discloses a device for keeping foreign gas away from systems with variable volumes due to temperature, in particular electrical transformers, connected to an integrated device for insulating liquid temperature-dependent or independent pressure control. The invention described there has an expansion vessel that a membrane is arranged between the insulating liquid and the outside air or a gas cushion, which prevents a direct exchange of the 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.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 if the gas volume inside the transformer rises excessively, no switch-off mechanism is provided, since the systems described above are only designed 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. 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.GB368264 describes an expansion vessel for transformers in which a multi-chamber system that is graduated against each other prevents outside air from entering the cooling circuit. The disadvantage here, however, is that this system only works in a stationary inertial system, since when the expansion vessel is accelerated, the liquid columns can move against each other, thus permitting outside air to enter the cooling circuit. The object of the present invention is to avoid the above-mentioned disadvantages in the prior art and to provide an expansion vessel which 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 angeordne .The object is achieved by the invention described in claim 1. According to the invention it is provided that in a first chamber a first pipeline system connects the first chamber with a liquid system, and a second pipeline system connects the first chamber with at least one further, second chamber, the second pipeline system being arranged in the second chamber so that at existing liquid in the second chamber, the liquid pressure generated thereby also exists in the second pipeline system and the second pipeline system is arranged in the first chamber such that the second pipeline system is also completely filled with a liquid only when the first chamber is completely filled with a liquid and thus creating a hydraulic connection between the fluid system and the second chamber. When the first pipeline system is completely filled, the ingress of outside air or gases into the liquid system via the second chamber is also prevented in this case. The opening of the second pipeline system is advantageously 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.It is also advantageous that at least one membrane in the second chamber seals off the surface of the liquid from the gas phase in the second chamber. According to a further preferred embodiment, the first chamber arranged within the second chamber, the chambers being rotationally symmetrical and the surface of the liquid in the second chamber being sealed off from the gas phase in the second chamber by a rotationally symmetrical membrane. This arrangement of the chambers enables a single membrane, for example in the form of a ring, to be used. The membrane is preferably 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.Brackets advantageously fix the membrane to the inner wall of the second chamber. Alternatively, sealing 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 on 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.The cross sections and / or the heights of the pipeline systems are preferably designed and designed as a function of the maximum in the first chamber with regard to the possible liquid pressure. An air dehumidifier reduces the moisture in the gas phase in the second chamber so that the membrane top is not chemically and physically attacked by moisture in the gas phase.

Weiterhin ist erfindungsgemäß ein System zur Überwachung eines Gasvolumens in einer flussigkeitsbefuUten Anlage (9) , insbesondere ein Transformator, vorgesehen, dass mindestens ein Mehrkammersystem, eine Flüssigkeitssystem und eine Vorrichtung zur Überwachung des Gasvolumens, insbesondere ein Buchholzrelais u fasst, 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, according to the invention, a system for monitoring a gas volume in a liquid-based system (9), in particular a transformer, is provided that includes at least one multi-chamber system, a liquid system and a device for monitoring the gas volume, in particular a Buchholz relay u, the system using a liquid system is connected to the device for monitoring the gas volume and the multi-chamber system. According to a preferred embodiment the multi-chamber system downstream of the device for monitoring the gas volume.

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.It is also advantageous to use the multi-chamber system as an expansion vessel for liquid-cooled systems, in particular transformers, in a means of transport. It is also preferred to use the system to monitor a gas volume in a means of transport. Due to accelerations of the means of transport, an almost leveled liquid column in the expansion vessel is not given, so that considerable pressure fluctuations can occur and outside air can also enter the liquid cooling system. The multi-chamber system according to the invention has the advantage that even in accelerated systems, such as a vehicle, the use of a liquid system for a transformer is possible. In addition, the ingress of air or gases from the outside of the system - even during accelerations - is prevented.

Weitere vorteilhafte Maßnahmen sind in den übrigen Ünteransprüchen beschrieben; die Erfindung wird anhand von Ausführungsbeispielen und den nachfolgenden Figuren näher beschrieben und es zeigt:Further advantageous measures are described in the remaining subclaims; the invention is described in more detail by means of exemplary embodiments and the following figures and it shows:

Fig. 1 eine schematische Darstellung des erfindungsgemäßen MehrkammerSystem;Fig. 1 is a schematic representation of the multi-chamber system according to the invention;

Fig. 2 eine schematische Darstellung des erfindungsgemäßen System zur Überwachung eines Gasvolumens in einer mit einer flussigkeitsbefuUten Anlage. In der Fig. 1 ist ein erfindungsgemäßes Mehrkammersystem 1 dargestellt.2 shows a schematic representation of the system according to the invention for monitoring a gas volume in a system with a liquid-dependent system. 1 shows a multi-chamber system 1 according to the invention.

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 the two chambers 2, 3 are connected to one another via a second pipe system 5. A first pipeline system 4 is connected to a liquid 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 in such a way that liquid can only be moved between the first and second chambers 2, 3 via the upper opening of the second piping system 5, the opening being arranged just below the upper ceiling of the first chamber 2 is. When the first chamber 2 is completely filled with a liquid, a hydraulic connection between the second container 3 and the cooling system is first established via the liquid system 10 in this case. This construction also prevents air or gases in the second chamber 3 from entering the first chamber 2 via the second pipeline system 5 and then entering the liquid system 10 via the first pipeline system 4. The dehumidifier 7 serves to reduce the degree of moisture in 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 also provided, which tightly and hermetically seals the liquid in the second chamber 3 with respect to the gas phase. The membrane 6a is fixed to the inner wall of the second chamber 3 by means of brackets 8. This prevents air or gases from entering the multi-chamber system 1 and thus the liquid system 10, even if due to External influences could "tear off" the liquid columns in the pipeline systems 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 enables liquid compensation within the multi-chamber system 1 and thus of the liquid system 10 without which air or gases can get in. Furthermore, with this multi-chamber system 1 according to the invention, the diffusion of air or gases from the gas phase of the second chamber 3 into the liquid of the second chamber 3 is prevented.

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 moisture in 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 flussigkeitsbefuUten Anlage 9, z.B. einen Transformator. Die in der flussigkeitsbefuUten 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. BezugzeichenFIG. 2 shows a schematic illustration of the system according to the invention for monitoring a gas volume in a system 9, for example a transformer, with a liquid-dependent system. The gases generated in the liquid-dependent system 9 are passed on to a Buchholz relay 11 in a liquid system 10. The gas volume generated is monitored in the Buchholz relay. Furthermore, the multi-chamber system 1 is coupled to the liquid 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 can be freely selected, since the pressure equalization in the second chamber 3 (not shown) with the liquid system 10 takes place due to a hydraulic connection. The system is therefore also suitable for operation in accelerated systems. reference numeral

1. Mehrkammersystem 2. erste Kammer 3. zweite Kammer 4. erstes Rohrleitungssystem 5. zweites Rohrleitungssystem 6.a.,6.b. Membran 7. Luftentfeuchter 8. Membranhalterung 9. Flüssigkeitsbefüllte Anlage 10. Flüssigkeitssystem 11. Vorrichtung zur Überwachung eines Gasvolumens 12. Gasphase in der zweiten Kammer 1. multi-chamber system 2. first chamber 3. second chamber 4. first piping system 5. second piping system 6.a., 6.b. Membrane 7. Dehumidifier 8. Membrane holder 9. Liquid-filled system 10. Liquid system 11. Device for monitoring a gas volume 12. Gas phase in the second chamber

Claims

Patentansprüche claims 1. Mehrkammersystem (1) als Flüssigkeitsausdehnungsgefäß, dadurch gekennzeichnet, dass in einer ersten Kammer (2) ein erstes Rohrleitungssystem (4) die erste Kammer (2) mit einer Flüssigkeitssystem (10) verbindet, sowie ein zweites Rohrleitungssystem (5) die erste Kammer (2) mit mindestens einer weiteren, zweiten Kammer (3) verbindet, wobei das zweite Rohrleitungssystem (5) in der zweiten Kammer (3) so angeordnet ist, dass bei vorhandener Flüssigkeit in der zweiten Kammer (3) der hierdurch erzeugte Flüssigkeitsdruck ebenfalls im zweiten Rohrleitungssystem (5) vorhanden und das zweite Rohrleitungssystem (5) so in der ersten Kammer (2) angeordnet ist, dass erst bei einer vollständigen Befüllung der ersten Kammer (2) mit einer Flüssigkeit das zweite Rohrleitungssystem (5) ebenfalls vollständig mit einer Flüssigkeit befüllt ist und damit eine hydraulische Verbindung zwischen der Flüssigkeitssystem (10) mit der zweiten Kammer (3) entsteht.1. Multi-chamber system (1) as a liquid expansion vessel, characterized in that in a first chamber (2) a first pipe system (4) connects the first chamber (2) with a liquid system (10), and a second pipe system (5) the first chamber (2) connects to at least one further, second chamber (3), the second piping system (5) being arranged in the second chamber (3) in such a way that if there is liquid in the second chamber (3), the liquid pressure generated thereby is also in the second pipe system (5) is present and the second pipe system (5) is arranged in the first chamber (2) in such a way that the second pipe system (5) also completely with a liquid only when the first chamber (2) is completely filled with a liquid is filled and thus a hydraulic connection between the liquid system (10) with the second chamber (3) is created. 2. Mehrkammersystem (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Öffnung des zweites2. Multi-chamber system (1) according to claim 1, characterized in that the opening of the second Rohrleitungssystems (5) im oberen Bereich der ersten Kammer (2) angeordnet ist.Pipe system (5) is arranged in the upper region of the first chamber (2). 3. Mehrkammersystem (1) nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass mindestens eine Membran (6a) in der zweiten Kammer (3) die Oberfläche der Flüssigkeit gegenüber der Gasphase in der zweiten Kammer (3) dicht abschließt.3. Multi-chamber system (1) according to one of claims 1 or 2, characterized in that at least one membrane (6a) in the second chamber (3) seals the surface of the liquid against the gas phase in the second chamber (3). 4. Mehrkammersystem (1) nach Anspruch 3, dadurch gekennzeichnet, dass die erste Kammer (2) innerhalb der zweite Kammer (3) angeordnet- ist, wobei die Kammern (2,3) rotationssymmetrisch sind und die Oberfläche der Flüssigkeit in der zweiten Kammer (3) durch eine rotationssymmetrische Membran (6a) dicht gegenüber der Gasphase in der zweiten Kammer (3) abgeschlossen wird.4. Multi-chamber system (1) according to claim 3, characterized in that the first chamber (2) within the second chamber (3) is arranged, the chambers (2, 3) being rotationally symmetrical and the surface of the liquid in the second chamber (3) being sealed off from the gas phase in the second chamber (3) by a rotationally symmetrical membrane (6a) becomes. 5. Mehrkammersystem (1) nach einem der Ansprüche 3 oder 4, dadurch gekennzeichnet, dass die Membran (6a) elastisch ist. 5. Multi-chamber system (1) according to one of claims 3 or 4, characterized in that the membrane (6a) is elastic. 6. Mehrkammersystem (1) nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass Halterungen (8) an der Innenwand der zweiten Kammer (3) die Membran (6a) fixieren bzw. dicht abschließende Führungsschienen an der Innenwand der zweiten Kammer (3) die Membran (6a) korrespondierend zur Flüssigkeitsoberfläche in der zweiten Kammer (3) führen.6. Multi-chamber system (1) according to one of claims 3 to 5, characterized in that brackets (8) on the inner wall of the second chamber (3) fix the membrane (6a) or tightly fitting guide rails on the inner wall of the second chamber (3 ) guide the membrane (6a) corresponding to the liquid surface in the second chamber (3). 7. Mehrkammersystem (1) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Querschnitte und/oder die Höhen der Rohrleitungssysteme (4,5) in Abhängigkeit vom maximal in der ersten Kammer (2) möglichen Flüssigkeitsdruck konzipiert sind.7. Multi-chamber system (1) according to one of claims 1 to 6, characterized in that the cross sections and / or the heights of the piping systems (4,5) are designed as a function of the maximum possible liquid pressure in the first chamber (2). 8. Mehrkammersystem (1) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass ein Luftentfeuchter (7) die Feuchtigkeit in der Gasphase (12) in der zweiten Kammer (3) reduziert .8. Multi-chamber system (1) according to one of claims 1 to 7, characterized in that an air dehumidifier (7) reduces the moisture in the gas phase (12) in the second chamber (3). 9. System zur Überwachung eines Gasvolumens in einer flussigkeitsbefuUten Anlage (9), insbesondere ein Transformator, umfassend mindestens ein Mehrkammersystem (1) gemäß einem der Ansprüche 1 bis 8, eine Flüssigkeitssystem (10) und eine Vorrichtung (11) zur Überwachung des Gasvolumens, insbesondere ein Buchholzrelais, wobei die Anlage (9) über eine Flüssigkt-xtssystem (10) mit der Vorrichtung (11) zur Überwachung des Gasvolumens und dem Mehrkammersystem (1) verbunden ist.9. System for monitoring a gas volume in a liquid-based system (9), in particular a transformer, comprising at least one multi-chamber system (1) according to one of claims 1 to 8, a liquid system (10) and a device (11) for monitoring the gas volume, in particular a Buchholz relay, the System (9) is connected to the device (11) for monitoring the gas volume and the multi-chamber system (1) via a liquid pressure system (10). 10. System nach Anspruch 9, dadurch gekennzeichnet, dass das Mehrkammersystem (1) der Vorrichtung (11) zur Überwachung des Gasvolumens nachgeordnet ist.10. System according to claim 9, characterized in that the multi-chamber system (1) of the device (11) for monitoring the gas volume is arranged downstream. 11.Verwendung des Mehrkammernsystems (1) nach einem der Ansprüche 1 bis 8 als Ausdehnungsgefäß für flüssigkeitsgekühlte Anlagen (9), insbesondere Transformatoren, in einem Transportmittel.11. Use of the multi-chamber system (1) according to one of claims 1 to 8 as an expansion vessel for liquid-cooled systems (9), in particular transformers, in a means of transport. 12.Verwendung des Systems zur Überwachung eines Gasvolumens nach einem der Ansprüche 9 oder 10 in einem Transportmittel. 12. Use of the system for monitoring a gas volume according to one of claims 9 or 10 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

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

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US (1) US20070241115A1 (en)
EP (1) EP1730752B8 (en)
JP (1) JP4335943B2 (en)
CN (1) CN101048829B (en)
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WO (1) WO2005096329A1 (en)

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EP1730752B1 (en) 2016-08-31
CN101048829A (en) 2007-10-03
DE102004016583B3 (en) 2006-03-09
JP4335943B2 (en) 2009-09-30
JP2007531291A (en) 2007-11-01
WO2005096329A1 (en) 2005-10-13
CN101048829B (en) 2010-06-23
US20070241115A1 (en) 2007-10-18
EP1730752B8 (en) 2016-10-05

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