EP1372172B2 - Gas blast switch - Google Patents

Gas blast switch Download PDF

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Publication number
EP1372172B2
EP1372172B2 EP20030007854 EP03007854A EP1372172B2 EP 1372172 B2 EP1372172 B2 EP 1372172B2 EP 20030007854 EP20030007854 EP 20030007854 EP 03007854 A EP03007854 A EP 03007854A EP 1372172 B2 EP1372172 B2 EP 1372172B2
Authority
EP
European Patent Office
Prior art keywords
intermediate wall
gas
blast switch
insulation
gas blast
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.)
Expired - Lifetime
Application number
EP20030007854
Other languages
German (de)
French (fr)
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EP1372172A1 (en
EP1372172B1 (en
Inventor
Achim Stelter
Victor Bierich
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Grid Solutions SAS
Original Assignee
Areva T&D SAS
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Application filed by Areva T&D SAS filed Critical Areva T&D SAS
Publication of EP1372172A1 publication Critical patent/EP1372172A1/en
Publication of EP1372172B1 publication Critical patent/EP1372172B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/901—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/901—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc
    • H01H2033/902—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc with the gases from hot space and compression volume following different paths to arc space or nozzle, i.e. the compressed gases do not pass through hot volume
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H2033/908—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism using valves for regulating communication between, e.g. arc space, hot volume, compression volume, surrounding volume

Definitions

  • the invention relates to a compressed gas switch according to the preamble of claim 1.
  • a gas blast switch is known in which a homogenization of the gas temperature in the expansion space by means of oblique holes in the insulating material is achieved.
  • Another gas blast switch is out of the EP 334 008 A2 known.
  • the intermediate wall 25 is provided to separate a pressure chamber 3 and a gas storage space 9 from each other.
  • a check valve 6 and a closure member 8 designed as a switching valve are provided to control the flow of hot and cold gas in the gas pressure switch.
  • the check valve 6 and in particular the changeover valve 8 are prone to failure.
  • Another gas blast switch is out of the DE 39 15 700 C3 known.
  • right part of DE 39 15 700 C3 shows that there the intermediate wall 10 is fixed via radially aligned webs on the cover 6 and in the material 4.
  • the DE 39 15 700 C3 first, the insulating material 5 must be installed, then the cover 6 and then only the partition 10.
  • the attached to the intermediate wall 10 webs must eg snap into existing holes in the cover 6 in order to achieve an attachment of the intermediate wall 10.
  • the material 4 must be installed, which in turn, if necessary, the webs of the intermediate wall 10 must be fixed in holes of the material 4.
  • the production of the gas blast switch brings the DE 39 15 700 C3 a considerable effort with it.
  • the object of the invention is to provide a gas pressure switch, which ensures a safe operation and allows for easier production.
  • the intermediate wall with appropriate effort, e.g. to attach to the cover.
  • the intermediate wall is connected in a simple manner with the insulating material, so that it is automatically fixed with the insulating material within the gas pressure switch. A connected with effort, separate attachment of the partition is no longer necessary.
  • the intermediate wall and the insulating material are integrally formed. This eliminates the assembly of the intermediate wall and the insulating material prior to their common installation in the gas blast switch. Instead, the one-piece component can be installed immediately in a single operation in the gas blast switch.
  • the one-piece production of the intermediate wall and the insulating nozzle thereby represents only a small overhead compared to the production of the insulating nozzle as a separate component, so that in this respect the production of the gas pressure switch is further simplified.
  • the intermediate wall with fastening means preferably by means of a latching connection, connected to the insulating material. This allows a particularly simple and quick assembly of the intermediate wall and the insulating material.
  • the intermediate wall of an insulating material preferably made of polytetrafluoroethylene (PTFE), which is optionally provided with a filler is particularly advantageous.
  • PTFE polytetrafluoroethylene
  • the sole figure of the drawing shows a schematic longitudinal section through an embodiment of a gas pressure switch according to the invention.
  • a compressed gas switch 30th shown, which is provided for switching a high voltage electrical.
  • the compressed gas switch 30 is largely rotationally symmetrical, which is why in the figure, only the right half of the gas blast switch 30 is shown.
  • the compressed gas switch 30 has two contact pieces 1, 2, of which one contact piece 1 is designed as a contact pin and the other contact piece 2 as a tulip contact.
  • the contact pieces 1, 2 are made of electrically conductive material.
  • the two switching pieces 1, 2 are shown in their open state, in which there is no electrical connection between them.
  • the two contact pieces 1, 2 are aligned coaxially with each other and can be moved in opposite directions to each other.
  • the contact pin dips into the tulip contact, so that an electrical connection is formed.
  • the longitudinal axis of the gas pressure switch 30 is fixed.
  • a switching path is formed between the two switching pieces 1, 2, in the region of which an insulating material nozzle 5 is arranged.
  • the insulating material 5 is made of polytetrafluoroethylene (PTFE) or other insulating material.
  • the tulip-shaped switching piece 2 is surrounded by a cylindrical cover 6, which is also made of PTFE or other insulating material. Between the Isolierstoffdüse 5 and the cover 6, a channel 7 is formed, which has a bent shape by about 90 degrees, and connects the switching path with a gas storage space 3.
  • the gas storage space 3 is limited in the radial direction on the one hand by the cover 6 and on the other hand by a coaxially arranged, cylindrical shell 4.
  • the jacket 4 is made of metal and at its end facing the insulating nozzle 5, it is designed as a rated current contact piece 27. At this end of the jacket 4 is located with its radially inner surface on the radially outer surface of the insulating material 5 at.
  • the pin-shaped contact piece 1 is coaxially surrounded by a metallic rated current contact piece 26, which forms an electrical connection with the rated current contact piece 27 in the closed state of the gas pressure switch 30.
  • the cover 6 comes with its end facing away from the channel 7 to the plant.
  • the bottom 25 bears with its radially outer edge against the inner surface of the jacket 4.
  • the gas storage space 3 is toroidal and arranged coaxially with the longitudinal axis of the gas pressure switch 30.
  • a discharge channel 8 is present, which extends within a tube.
  • the tube is coupled to a switch drive which is provided for reciprocating the two switching pieces 1, 2 and thus for switching the gas pressure switch 30. With the tube, the tulip-shaped contact piece 2 and the gas storage space 3 with the insulating material 5 and the cover 6 are firmly connected.
  • a piston 23 and a cylinder 24 are present, which form a compression device. From the piston 23 in the cylinder 24 compressed gas can be injected via the open check valve 22 into the gas storage chamber 3.
  • an intermediate wall 10 is present in the gas storage space 3.
  • the intermediate wall 10 is cylindrical and arranged coaxially to the longitudinal axis.
  • the intermediate wall 10 extends in the longitudinal direction of the gas storage space 3 and thus in the longitudinal direction of the gas pressure switch 30.
  • the partition wall 10 begins at the gas storage space 3 facing end portion of the Isolierstoffdüse 5 and ends above the bottom 25th
  • the intermediate wall 10 may have a non-cylindrical shape, e.g., the intermediate wall 10 may have a conical shape.
  • the intermediate wall 10 is formed integrally with the insulating material 5. This means that the intermediate wall 10 and the insulating material 5 are made as a component made of PTFE or other insulating material. Preferably, the PTFE or other material may be provided with a filler.
  • the intermediate wall 10 is made as a separate component of an insulating material and, for example by means of a snap-in connection or the like directly to the insulating material 5 is firmly connected.
  • the intermediate wall 10 has one or more first openings 11 at its upper end adjacent to its connection to the insulating material nozzle 5.
  • the openings 11 may be e.g. to act on bores which are arranged on the circumference of the cylindrical partition wall 10 at intervals to each other.
  • the intermediate wall 10 may be provided with further openings 9 in its longitudinally central region. Since the intermediate wall 10 ends above the bottom 25, a circumferential gap-shaped second opening 12 is present between this end of the intermediate wall 10 and the bottom 25.
  • the intermediate wall 10 divides the gas storage space 3 into an inflow subspace 13 and an outflow subspace 14.
  • the inflow subspace 13 is connected to the channel 7 via the area 15.
  • the discharge part space 14 is above the area 16 and the openings 11 connected to the channel 7.
  • the Einströmteilraum 13 and the Ausströmteilraum 14 are connected in their lower region via the opening 12 with each other.
  • the intermediate wall 10 may be provided on both its surfaces with at least one circumferential collar 17, e.g. in the form of different wall thicknesses, ie a thickening or thinning of the wall thickness of the intermediate wall 10 is formed in the radial direction. With the help of the collar 17, the gas flow through the Einströmteilraum 13 and / or the Ausströmteilraum 14 can be controlled. Furthermore, the intermediate wall can be provided on its two surfaces with at least one groove and / or a web, which are aligned in the longitudinal direction (not shown). In this way, the area formed by the intermediate wall 10 can be increased.
  • the switching pieces 1, 2 are moved apart from the switch drive. First, the rated current contacts 26, 27 are disconnected. Thereafter, the separation of the contact pieces 1, 2 takes place. The result is an arc between the switching pieces 1, 2 in the region of the switching path within the insulating 5.
  • the arc heats the extinguishing gas in the area of the switching path.
  • the extinguishing gas expands and penetrates through the channel 7 into the gas storage space 3. This is indicated by the arrow 18 in the figure.
  • a cooling of the heated quenching gas takes place in that the gas flowing into the gas storage space 3 is first guided in the longitudinal direction along the entire cover 6 and then along the almost entire jacket 4.
  • the heated quenching gas flows at the same time twice along the entire partition wall 10, which also causes a cooling due to the insulating material of the intermediate wall 10.
  • cool gas is blown into the gas storage chamber 3 by the movement of the switch drive from the piston 23 via the check valve 22, which has a further cooling of the heated quenching gas result.
  • the intermediate wall 10 and the insulating material 5 is made in one piece. This common component is then installed in a single operation in the figure from below into the gas blast switch 30. A complex assembly of the intermediate wall 10 with already installed Isolierstoffdüse 5 is not required.
  • the intermediate wall 10 is a separate component, first the intermediate wall 10 is connected to the insulating material nozzle 5. This can e.g. done by a locking connection. Thereafter, in turn, in a single operation, the existing of the intermediate wall 10 and the insulating material 5 component is installed from below into the gas pressure switch 30. Thus, even in the case of a separate partition 10, the advantage of incorporation of partition 10 and insulating nozzle 5 is obtained in a single operation.

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Description

Stand der TechnikState of the art

Die Erfindung betrifft einen Druckgasschalter nach dem Oberbegriff des Anspruchs 1.The invention relates to a compressed gas switch according to the preamble of claim 1.

Aus der CH 689 604 A5 ist ein Druckgasschalter bekannt, bei dem eine Homogenisierung der gastemperatur im Ausdehnungsraum mit Hilfe von schrägen Bohrungen in der Isolierstoffdüse erreicht wird.From the CH 689 604 A5 a gas blast switch is known in which a homogenization of the gas temperature in the expansion space by means of oblique holes in the insulating material is achieved.

Ein anderer Druckgasschalter ist aus der EP 334 008 A2 bekannt. Gemäß der dortigen Figur 1 ist die Zwischenwand 25 dazu vorgesehen, eine Druckkammer 3 und einen Gasspeicherraum 9 voneinander zu trennen. Ein Rückschlagventil 6 und ein als Umschaltventil ausgebildetes Verschlussorgan 8 sind dazu vorgesehen, die Strömung von heißem und kaltem Gas in dem Druckgasschalter zu steuern. Ersichtlich sind das Rückschlagventil 6 und insbesondere das Umschaltventil 8 störungsanfällig.Another gas blast switch is out of the EP 334 008 A2 known. According to the local figure 1, the intermediate wall 25 is provided to separate a pressure chamber 3 and a gas storage space 9 from each other. A check valve 6 and a closure member 8 designed as a switching valve are provided to control the flow of hot and cold gas in the gas pressure switch. As can be seen, the check valve 6 and in particular the changeover valve 8 are prone to failure.

Ein anderer Druckgasschalter ist aus der DE 39 15 700 C3 bekannt. Beispielsweise aus der Figur 1, rechter Teil der DE 39 15 700 C3 ergibt sich, dass dort die Zwischenwand 10 über radial ausgerichtete Stege an der Abdeckung 6 und in dem Material 4 befestigt ist. Dies bedeutet, dass bei der Herstellung des Druckgasschalters der DE 39 15 700 C3 zuerst die Isolierstoffdüse 5 eingebaut werden muss, dann die Abdeckung 6 und dann erst die Zwischenwand 10. Die an der Zwischenwand 10 angebrachten Stege müssen dabei z.B. in vorhandene Bohrungen der Abdeckung 6 einrasten, um eine Befestigung der Zwischenwand 10 zu erreichen. Danach muss das Material 4 eingebaut werden, wobei gegebenenfalls wiederum die Stege der Zwischenwand 10 in Bohrungen des Materials 4 fixiert werden müssen. Ersichtlich bringt die Herstellung des Druckgasschalters der DE 39 15 700 C3 einen erheblichen Aufwand mit sich.Another gas blast switch is out of the DE 39 15 700 C3 known. For example, from the figure 1, right part of DE 39 15 700 C3 shows that there the intermediate wall 10 is fixed via radially aligned webs on the cover 6 and in the material 4. This means that in the manufacture of the gas blast switch the DE 39 15 700 C3 first, the insulating material 5 must be installed, then the cover 6 and then only the partition 10. The attached to the intermediate wall 10 webs must eg snap into existing holes in the cover 6 in order to achieve an attachment of the intermediate wall 10. Thereafter, the material 4 must be installed, which in turn, if necessary, the webs of the intermediate wall 10 must be fixed in holes of the material 4. Obviously, the production of the gas blast switch brings the DE 39 15 700 C3 a considerable effort with it.

Weiterer Stand der Technik ist aus der US 4,486,632 und der DE 196 13 030 bekannt.Further prior art is known from US 4,486,632 and the DE 196 13 030 known.

Aufgabe, Lösung und Vorteile der ErfindungTask, solution and advantages of the invention

Aufgabe der Erfindung ist es, einen Druckgasschalter zu schaffen, der eine sichere Funktionsweise gewährleistet und der eine einfachere Herstellung ermöglicht.The object of the invention is to provide a gas pressure switch, which ensures a safe operation and allows for easier production.

Diese Aufgabe wird bei einem Druckgasschalter der eingangs genannten Art erfindungsgemäß durch die Merkmale des kennzeichnenden Teils des Anspruchs 1 gelöst.This object is achieved according to the invention in a gas blast switch of the type mentioned by the features of the characterizing part of claim 1.

Durch die Verbindung der Zwischenwand mit der Isolierstoffdüse wird der Vorteil erreicht, dass diese beiden Teile vor deren Einbau in den Druckgasschalter zusammengebaut und dann als gemeinsames Bauteil in einem einzigen Arbeitsgang in den Druckgasschalter eingebaut werden können. Dies stellt eine erhebliche Vereinfachung der Herstellung des Druckgasschalter dar.Through the connection of the intermediate wall with the insulating nozzle, the advantage is achieved that these two parts can be assembled prior to their installation in the gas blast switch and then installed as a common component in a single operation in the gas blast switch. This represents a considerable simplification of the production of the compressed gas switch.

Weiterhin ist es nicht mehr erforderlich, die Zwischenwand mit entsprechendem Aufwand z.B. an der Abdeckung zu befestigen. Statt dessen ist die Zwischenwand in einfacher Weise mit der Isolierstoffdüse verbunden, so dass sie automatisch mit der Isolierstoffdüse innerhalb des Druckgasschalters fixiert wird. Eine mit Aufwand verbundene, gesonderte Befestigung der Zwischenwand ist nicht mehr notwendig.Furthermore, it is no longer necessary, the intermediate wall with appropriate effort, e.g. to attach to the cover. Instead, the intermediate wall is connected in a simple manner with the insulating material, so that it is automatically fixed with the insulating material within the gas pressure switch. A connected with effort, separate attachment of the partition is no longer necessary.

Bei einer besonders vorteilhaften Ausgestaltung der Erfindung sind die Zwischenwand und die Isolierstoffdüse einstückig ausgebildet. Damit entfällt auch der Zusammenbau der Zwischenwand und der Isolierstoffdüse vor deren gemeinsamen Einbau in den Druckgasschalter. Statt dessen kann das einstückige Bauteil sofort in einem einzigen Arbeitsgang in den Druckgasschalter eingebaut werden.In a particularly advantageous embodiment of the invention, the intermediate wall and the insulating material are integrally formed. This eliminates the assembly of the intermediate wall and the insulating material prior to their common installation in the gas blast switch. Instead, the one-piece component can be installed immediately in a single operation in the gas blast switch.

Die einstückige Herstellung der Zwischenwand und der Isolierstoffdüse stellt dabei nur einen geringen Mehraufwand im Vergleich zur Herstellung der Isolierstoffdüse als separates Bauteil dar, so dass auch insoweit die Herstellung des Druckgasschalters weiter vereinfacht wird.The one-piece production of the intermediate wall and the insulating nozzle thereby represents only a small overhead compared to the production of the insulating nozzle as a separate component, so that in this respect the production of the gas pressure switch is further simplified.

Bei einer anderen vorteilhaften Ausgestaltung der Erfindung ist die Zwischenwand mit Befestigungsmitteln, vorzugsweise mittels einer Rastverbindung, mit der Isolierstoffdüse verbunden. Dies ermöglicht einen besonders einfachen und schnellen Zusammenbau der Zwischenwand und der Isolierstoffdüse.In another advantageous embodiment of the invention, the intermediate wall with fastening means, preferably by means of a latching connection, connected to the insulating material. This allows a particularly simple and quick assembly of the intermediate wall and the insulating material.

Besonders vorteilhaft ist es, wenn die Zwischenwand aus einem isolierenden Material, vorzugsweise aus Polytetrafluorethylen (PTFE) besteht, das gegebenenfalls mit einem Füllstoff versehen ist. Auf diese Weise wird eine besonders effektive Kühlung des in den Gasspeicherraum eingeleiteten erhitzten Löschgases erreicht.It when the intermediate wall of an insulating material, preferably made of polytetrafluoroethylene (PTFE), which is optionally provided with a filler is particularly advantageous. In this way, a particularly effective cooling of the introduced into the gas storage space heated quenching gas is achieved.

Weitere Merkmale, Anwendungsmöglichkeiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen der Erfindung, die in der Zeichnung dargestellt sind. Dabei bilden alle beschriebenen oder dargestellten Merkmale für sich oder in beliebiger Kombination den Gegenstand der Erfindung, unabhängig von ihrer Zusammenfassung in den Patentansprüchen oder deren Rückbeziehung sowie unabhängig von ihrer Formulierung bzw. Darstellung in der Beschreibung bzw. in der Zeichnung.Other features, applications and advantages of the invention will become apparent from the following description of exemplary embodiments of the invention, which are illustrated in the drawing. All described or illustrated features, alone or in any combination form the subject matter of the invention, regardless of their summary in the claims or their dependency and regardless of their formulation or representation in the description or in the drawing.

Ausführungsbeispiele der ErfindungEmbodiments of the invention

Die einzige Figur der Zeichnung zeigt einen schematischen Längsschnitt durch ein Ausführungsbeispiel eines erfindungsgemäßen Druckgasschalters.The sole figure of the drawing shows a schematic longitudinal section through an embodiment of a gas pressure switch according to the invention.

In der Figur ist ein Druckgasschalter 30 dargestellt, der zum Schalten einer elektrischen Hochspannung vorgesehen ist. Der Druckgasschalter 30 ist weitgehend rotationssymmetrisch ausgebildet, weshalb in der Figur nur die rechte Hälfte des Druckgasschalters 30 gezeigt ist.In the figure, a compressed gas switch 30th shown, which is provided for switching a high voltage electrical. The compressed gas switch 30 is largely rotationally symmetrical, which is why in the figure, only the right half of the gas blast switch 30 is shown.

Der Druckgasschalter 30 weist zwei Schaltstücke 1, 2 auf, von denen das eine Schaltstück 1 als Kontaktstift und das andere Schaltstück 2 als Tulpenkontakt ausgebildet ist. Die Schaltstücke 1, 2 sind aus elektrisch leitfähigem Material hergestellt. Die beiden Schaltstücke 1, 2 sind in ihrem geöffneten Zustand dargestellt, in dem keine elektrische Verbindung zwischen ihnen vorhanden ist.The compressed gas switch 30 has two contact pieces 1, 2, of which one contact piece 1 is designed as a contact pin and the other contact piece 2 as a tulip contact. The contact pieces 1, 2 are made of electrically conductive material. The two switching pieces 1, 2 are shown in their open state, in which there is no electrical connection between them.

Die beiden Schaltstücke 1, 2 sind koaxial zueinander ausgerichtet und können gegenläufig zueinander bewegt werden. Im daraus resultierenden geschlossenen Zustand der beiden Schaltstücke 1, 2 taucht der Kontaktstift in den Tulpenkontakt ein, so dass eine elektrische Verbindung entsteht. Durch die Bewegungsrichtung der beiden Schaltstücke 1, 2 wird die Längsachse des Druckgasschalters 30 festgelegt.The two contact pieces 1, 2 are aligned coaxially with each other and can be moved in opposite directions to each other. In the resulting closed state of the two contact pieces 1, 2, the contact pin dips into the tulip contact, so that an electrical connection is formed. By the direction of movement of the two switching pieces 1, 2, the longitudinal axis of the gas pressure switch 30 is fixed.

Im gezeigten geöffneten Zustand ist zwischen den beiden Schaltstücken 1, 2 eine Schaltstrecke ausgebildet, in deren Bereich eine Isolierstoffdüse 5 angeordnet ist. Die Isolierstoffdüse 5 besteht aus Polytetrafluorethylen (PTFE) oder einem sonstigen isolierenden Material. Das tulpenförmig ausgebildete Schaltstück 2 ist von einer zylindrischen Abdeckung 6 umgeben, die ebenfalls aus PTFE oder einem sonstigen isolierenden Material hergestellt ist. Zwischen der Isolierstoffdüse 5 und der Abdeckung 6 ist ein Kanal 7 ausgebildet, der eine um etwa 90 Grad gebogene Form aufweist, und der die Schaltstrecke mit einem Gasspeicherraum 3 verbindet.In the open state shown, a switching path is formed between the two switching pieces 1, 2, in the region of which an insulating material nozzle 5 is arranged. The insulating material 5 is made of polytetrafluoroethylene (PTFE) or other insulating material. The tulip-shaped switching piece 2 is surrounded by a cylindrical cover 6, which is also made of PTFE or other insulating material. Between the Isolierstoffdüse 5 and the cover 6, a channel 7 is formed, which has a bent shape by about 90 degrees, and connects the switching path with a gas storage space 3.

Der Gasspeicherraum 3 ist in radialer Richtung einerseits durch die Abdeckung 6 sowie andererseits durch einen koaxial angeordneten, zylinderförmigen Mantel 4 begrenzt. Der Mantel 4 besteht aus Metall und an seinem der Isolierstoffdüse 5 zugewandten Ende ist er als Nennstromkontaktstück 27 ausgebildet. An diesem Ende liegt der Mantel 4 mit seiner radial innenliegenden Fläche an der radial außenliegenden Fläche der Isolierstoffdüse 5 an.The gas storage space 3 is limited in the radial direction on the one hand by the cover 6 and on the other hand by a coaxially arranged, cylindrical shell 4. The jacket 4 is made of metal and at its end facing the insulating nozzle 5, it is designed as a rated current contact piece 27. At this end of the jacket 4 is located with its radially inner surface on the radially outer surface of the insulating material 5 at.

Das stiftförmig ausgebildete Schaltstück 1 ist von einem metallischen Nennstromkontaktstück 26 koaxial umgeben, der im geschlossenen Zustand des Druckgasschalters 30 mit dem Nennstromkontaktstück 27 eine elektrische Verbindung bildet.The pin-shaped contact piece 1 is coaxially surrounded by a metallic rated current contact piece 26, which forms an electrical connection with the rated current contact piece 27 in the closed state of the gas pressure switch 30.

In Längsrichtung ist der Gasspeicherraum 3 durch einen Boden 25 begrenzt. An dem Boden 25 kommt dabei einerseits die Abdeckung 6 mit ihrem dem Kanal 7 abgewandten Ende zur Anlage. Andererseits liegt der Boden 25 mit seinem radial außenliegenden Rand an der Innenfläche des Mantels 4 an.In the longitudinal direction of the gas storage space 3 is limited by a bottom 25. At the bottom 25, on the one hand, the cover 6 comes with its end facing away from the channel 7 to the plant. On the other hand, the bottom 25 bears with its radially outer edge against the inner surface of the jacket 4.

Auf diese Weise ist der Gasspeicherraum 3 toroidförmig ausgebildet und koaxial zu der Längsachse des Druckgasschalters 30 angeordnet.In this way, the gas storage space 3 is toroidal and arranged coaxially with the longitudinal axis of the gas pressure switch 30.

Im Anschluss an das tulpenförmig ausgebildete Schaltstück 2 ist ein Abströmkanal 8 vorhanden, der innerhalb eines Rohrs verläuft. Das Rohr ist mit einem Schalterantrieb gekoppelt, der zum Hin- und Herbewegen der beiden Schaltstücke 1, 2 und damit zum Schalten des Druckgasschalters 30 vorgesehen ist. Mit dem Rohr sind das tulpenförmige Schaltstück 2 und der Gasspeicherraum 3 mit der Isolierstoffdüse 5 und der Abdeckung 6 fest verbunden.Following the tulip-shaped switching piece 2, a discharge channel 8 is present, which extends within a tube. The tube is coupled to a switch drive which is provided for reciprocating the two switching pieces 1, 2 and thus for switching the gas pressure switch 30. With the tube, the tulip-shaped contact piece 2 and the gas storage space 3 with the insulating material 5 and the cover 6 are firmly connected.

In dem Boden 25 ist eine Öffnung vorhanden, die mit einem Rückschlagventil 22 versehen ist. Auf der dem Gasspeicherraum 3 abgewandten Seite des Bodens 25 sind ein Kolben 23 und ein Zylinder 24 vorhanden, die eine Kompressionseinrichtung bilden. Von dem Kolben 23 in dem Zylinder 24 komprimiertes Gas kann über das geöffnete Rückschlagventil 22 in den Gasspeicherraum 3 eingeblasen werden.In the bottom 25 there is an opening provided with a check valve 22. On the side facing away from the gas storage chamber 3 side of the bottom 25, a piston 23 and a cylinder 24 are present, which form a compression device. From the piston 23 in the cylinder 24 compressed gas can be injected via the open check valve 22 into the gas storage chamber 3.

In dem Gasspeicherraum 3 ist eine Zwischenwand 10 vorhanden. Die Zwischenwand 10 ist zylinderförmig ausgebildet und koaxial zur Längsachse angeordnet. Die Zwischenwand 10 erstreckt sich in Längsrichtung des Gasspeicherraums 3 und damit in Längsrichtung des Druckgasschalters 30. Die Zwischenwand 10 beginnt an dem dem Gasspeicherraum 3 zugewandten Endbereich der Isolierstoffdüse 5 und endet oberhalb des Bodens 25.In the gas storage space 3, an intermediate wall 10 is present. The intermediate wall 10 is cylindrical and arranged coaxially to the longitudinal axis. The intermediate wall 10 extends in the longitudinal direction of the gas storage space 3 and thus in the longitudinal direction of the gas pressure switch 30. The partition wall 10 begins at the gas storage space 3 facing end portion of the Isolierstoffdüse 5 and ends above the bottom 25th

Alternativ kann die Zwischenwand 10 in einer nicht der Erfindung entsprechenden Ausführungsform eine nichtzylinderförmige Gestalt besitzen, z.B. kann die Zwischenwand 10 eine konische Form aufweisen.Alternatively, in an embodiment not according to the invention, the intermediate wall 10 may have a non-cylindrical shape, e.g. For example, the intermediate wall 10 may have a conical shape.

Die Zwischenwand 10 ist einstückig mit der Isolierstoffdüse 5 ausgebildet. Dies bedeutet, dass die Zwischenwand 10 und die Isolierstoffdüse 5 als ein Bauteil aus PTFE oder einem sonstigen isolierenden Material hergestellt werden. Vorzugsweise kann das PTFE oder das sonstige Material mit einem Füllstoff versehen sein.The intermediate wall 10 is formed integrally with the insulating material 5. This means that the intermediate wall 10 and the insulating material 5 are made as a component made of PTFE or other insulating material. Preferably, the PTFE or other material may be provided with a filler.

Alternativ ist es möglich, dass die Zwischenwand 10 als separates Bauteil aus einem isolierenden Material hergestellt ist und zum Beispiel mittels einer Rastverbindung oder dergleichen direkt mit der Isolierstoffdüse 5 fest verbunden ist.Alternatively, it is possible that the intermediate wall 10 is made as a separate component of an insulating material and, for example by means of a snap-in connection or the like directly to the insulating material 5 is firmly connected.

Die Zwischenwand 10 weist an ihrem oberen Ende benachbart zu ihrer Verbindung mit der Isolierstoffdüse 5 eine oder mehrere erste Öffnungen 11 auf. Bei den Öffnungen 11 kann es sich z.B. um Bohrungen handeln, die auf dem Umfang der zylinderförmigen Zwischenwand 10 mit Abständen zueinander angeordnet sind.The intermediate wall 10 has one or more first openings 11 at its upper end adjacent to its connection to the insulating material nozzle 5. The openings 11 may be e.g. to act on bores which are arranged on the circumference of the cylindrical partition wall 10 at intervals to each other.

In entsprechender Weise kann die Zwischenwand 10 in ihrem in Längsrichtung mittleren Bereich mit weiteren Öffnungen 9 versehen sein. Da die Zwischenwand 10 oberhalb des Bodens 25 endet, ist zwischen diesem Ende der Zwischenwand 10 und dem Boden 25 eine umlaufende spaltförmige zweite Öffnung 12 vorhanden.In a corresponding manner, the intermediate wall 10 may be provided with further openings 9 in its longitudinally central region. Since the intermediate wall 10 ends above the bottom 25, a circumferential gap-shaped second opening 12 is present between this end of the intermediate wall 10 and the bottom 25.

Die Zwischenwand 10 teilt den Gasspeicherraum 3 in einen Einströmteilraum 13 und einen Ausströmteilraum 14. Der Einströmteilraum 13 ist über den Bereich 15 mit dem Kanal 7 verbunden. Der Ausströmteilraum 14 ist über den Bereich 16 und die Öffnungen 11 mit dem Kanal 7 verbunden. Der Einströmteilraum 13 und der Ausströmteilraum 14 sind in ihrem unteren Bereich über die Öffnung 12 miteinander verbunden.The intermediate wall 10 divides the gas storage space 3 into an inflow subspace 13 and an outflow subspace 14. The inflow subspace 13 is connected to the channel 7 via the area 15. The discharge part space 14 is above the area 16 and the openings 11 connected to the channel 7. The Einströmteilraum 13 and the Ausströmteilraum 14 are connected in their lower region via the opening 12 with each other.

Die Zwischenwand 10 kann auf ihren beiden Flächen mit mindestens einem umlaufenden Bund 17 versehen sein, der z.B. in der Form unterschiedlicher Wandstärken, also einer Verdickung oder Verdünnung der Wandstärke der Zwischenwand 10 in radialer Richtung ausgebildet ist. Mit Hilfe des Bunds 17 kann die Gasströmung durch den Einströmteilraum 13 und/oder den Ausströmteilraum 14 gesteuert werden. Weiterhin kann die Zwischenwand auf ihren beiden Flächen mit mindestens einer Nut und/oder einem Steg versehen sein, die in Längsrichtung ausgerichtet sind (nicht dargestellt). Auf diese Weise kann die von der Zwischenwand 10 gebildete Fläche vergrößert werden.The intermediate wall 10 may be provided on both its surfaces with at least one circumferential collar 17, e.g. in the form of different wall thicknesses, ie a thickening or thinning of the wall thickness of the intermediate wall 10 is formed in the radial direction. With the help of the collar 17, the gas flow through the Einströmteilraum 13 and / or the Ausströmteilraum 14 can be controlled. Furthermore, the intermediate wall can be provided on its two surfaces with at least one groove and / or a web, which are aligned in the longitudinal direction (not shown). In this way, the area formed by the intermediate wall 10 can be increased.

Beim Übergang des Druckgasschalters 30 von seinem geschlossenen in seinen gezeigten, geöffneten Zustand werden die Schaltstücke 1, 2 von dem Schalterantrieb auseinanderbewegt. Zuerst werden die Nennstromkontaktstücke 26, 27 getrennt. Danach findet die Trennung der Schaltstücke 1, 2 statt. Es entsteht ein Lichtbogen zwischen den Schaltstücken 1, 2 im Bereich der Schaltstrecke innerhalb der Isolierstoffdüse 5.At the transition of the gas pressure switch 30 from its closed in its open state shown, the switching pieces 1, 2 are moved apart from the switch drive. First, the rated current contacts 26, 27 are disconnected. Thereafter, the separation of the contact pieces 1, 2 takes place. The result is an arc between the switching pieces 1, 2 in the region of the switching path within the insulating 5.

Der Lichtbogen erhitzt das Löschgas im Bereich der Schaltstrecke. Das Löschgas expandiert und dringt durch den Kanal 7 in den Gasspeicherraum 3 ein. Dies, ist in der Figur mit dem Pfeil 18 gekennzeichnet.The arc heats the extinguishing gas in the area of the switching path. The extinguishing gas expands and penetrates through the channel 7 into the gas storage space 3. This is indicated by the arrow 18 in the figure.

Innerhalb des Gasspeicherraums 3 erfolgt eine Durchmischung des erhitzten Löschgases mit dort befindlichem, nicht erhitztem Gas. Dies wird insbesondere dadurch erreicht, dass aufgrund der Öffnungen 11, 9 und 12 ein Gasaustausch zwischen dem Einströmteilraum 13 und dem Ausströmteilraum 124 erfolgen kann. Dies ist in der Figur mit dem Pfeil 19 gekennzeichnet und führt zu einer Abkühlung des erhitzten Löschgases.Within the gas storage space 3, a mixing of the heated quenching gas takes place there with befindlichem, not heated gas. This is achieved in particular by virtue of the fact that gas can be exchanged between the inflow subspace 13 and the outflow subspace 124 due to the openings 11, 9 and 12. This is indicated in the figure by the arrow 19 and leads to a cooling of the heated quenching gas.

Weiterhin erfolgt eine Abkühlung des erhitzten Löschgases dadurch, dass das in den Gasspeicherraum 3 einströmende Gas zuerst in Längsrichtung entlang der gesamten Abdeckung 6 und dann entlang dem nahezu gesamten Mantel 4 geführt wird. Dabei strömt das erhitzte Löschgas gleichzeitig zwei Mal an der gesamten Zwischenwand 10 entlang, was aufgrund des isolierenden Materials der Zwischenwand 10 ebenfalls eine Abkühlung bewirkt.Furthermore, a cooling of the heated quenching gas takes place in that the gas flowing into the gas storage space 3 is first guided in the longitudinal direction along the entire cover 6 and then along the almost entire jacket 4. In this case, the heated quenching gas flows at the same time twice along the entire partition wall 10, which also causes a cooling due to the insulating material of the intermediate wall 10.

Weiterhin wird durch die Bewegung des Schalterantriebs von dem Kolben 23 über das Rückschlagventil 22 kühles Gas in den Gasspeicherraum 3 eingeblasen, das eine weitere Abkühlung des erhitzten Löschgases zur Folge hat.Furthermore, cool gas is blown into the gas storage chamber 3 by the movement of the switch drive from the piston 23 via the check valve 22, which has a further cooling of the heated quenching gas result.

Mit der Annäherung des über den Lichtbogen fließenden Stromes an den Nulldurchgang lässt der Druck des Löschgases innerhalb der Schaltstrecke nach und das im Gasspeicherraum 3 befindliche abgekühlte Löschgas flutet durch den Kanal 7 wieder zurück zur Schaltstrecke. Dies ist in der Figur durch den Pfeil 20 gekennzeichnet. Dadurch wird der Lichtbogen beblasen, so dass er im Nulldurchgang erlischt.With the approach of the current flowing through the arc current to the zero crossing of the pressure of the extinguishing gas within the switching path and the gas in the storage space 3 located cooled extinguishing gas floods through the channel 7 back to the switching path. This is indicated by the arrow 20 in the figure. As a result, the arc is blown so that it goes out at zero crossing.

Bei der Montage des Druckgasschalters 30 wird die Zwischenwand 10 und die Isolierstoffdüse 5 einstückig hergestellt. Dieses gemeinsame Bauteil wird danach in einem einzigen Arbeitsgang in der Figur von unten in den Druckgasschalter 30 eingebaut. Eine aufwendige Montage der Zwischenwand 10 bei bereits eingebauter Isolierstoffdüse 5 ist nicht erforderlich.During assembly of the gas blast switch 30, the intermediate wall 10 and the insulating material 5 is made in one piece. This common component is then installed in a single operation in the figure from below into the gas blast switch 30. A complex assembly of the intermediate wall 10 with already installed Isolierstoffdüse 5 is not required.

Handelt es sich bei der Zwischenwand 10 um ein separates Bauteil, so wird zuerst die Zwischenwand 10 mit der Isolierstoffdüse 5 verbunden. Dies kann z.B. durch eine Rastverbindung erfolgen. Danach wird wiederum in einem einzigen Arbeitsgang das aus der Zwischenwand 10 und der Isolierstoffdüse 5 bestehende Bauteil von unten in den Druckgasschalter 30 eingebaut. Somit bleibt auch im Falle einer separaten Zwischenwand 10 der Vorteil eines Einbaus von Zwischenwand 10 und Isolierstoffdüse 5 in einem einzigen Arbeitsgang erhalten.If the intermediate wall 10 is a separate component, first the intermediate wall 10 is connected to the insulating material nozzle 5. This can e.g. done by a locking connection. Thereafter, in turn, in a single operation, the existing of the intermediate wall 10 and the insulating material 5 component is installed from below into the gas pressure switch 30. Thus, even in the case of a separate partition 10, the advantage of incorporation of partition 10 and insulating nozzle 5 is obtained in a single operation.

Claims (9)

  1. A gas blast switch (30) having two switch members (1, 2), between which there is a gap in the switched-off state, having an insulation-material nozzle (5), which is provided in the area of the gap, having a gas storage chamber (3), which is adjacent to the insulation-material nozzle (5), is connected to the gap via a channel (7) that is formed, inter alia, by the insulation-material nozzle (5), and has a base (25) on its side facing away from the insulation-material nozzle (5), and having within the gas storage chamber (3) an intermediate wall (10), which is directly connected to the insulation-material nozzle (5), whereby the intermediate wall (10) commences at the end area of the insulation-material nozzle (5) facing the gas storage chamber (3), whereby the intermediate wall (10) has a first permanently open aperture (11) at least approximately adjoining its connection to the insulation-material nozzle (5), whereby the intermediate wall (10) terminates above the base (25) and thus forms a second permanently open aperture (12), whereby the intermediate wall (10) divides the gas storage chamber (3) into a partial inflow chamber (13) and a partial outflow chamber (14), and whereby heated quenching gas flows through the partial inflow chamber (13) and the partial outflow chamber (14) and, in the process, flows along the entire intermediate wall (10) twice, wherein the intermediate wall (10) has a cylindrical shape.
  2. The gas blast switch (30) as recited in Claim 1, wherein the intermediate wall (10) and the insulation-material nozzle (5) are manufactured as a single piece.
  3. The gas blast switch (30) as recited in Claim 1, wherein the intermediate wall (10) is connected to the insulation-material nozzle (5) by an attachment means, preferably through a latching connection.
  4. The gas blast switch (30) as recited in any of the preceding claims, wherein the intermediate wall (10) is made of an insulating material, preferably a polytetrafluoroethylene (PTFE), which, if appropriate, is provided with a filler.
  5. The gas blast switch (30) as recited in any of the preceding claims, wherein the intermediate wall (10) and the insulation-material nozzle (5) can be installed in the gas blast switch (30) as a single assembly in one single work step during the manufacture of the gas blast switch (30).
  6. The gas blast switch (30) as recited in any of the preceding claims, wherein the intermediate wall (10) is provided with additional apertures (9) in its central area.
  7. The gas blast switch (30) as recited in any of the preceding claims, wherein the intermediate wall (10) is oriented in the longitudinal direction.
  8. The gas blast switch (30) as recited in any of the preceding claims, wherein the intermediate wall (10) has at least one circumferential band (17) in the form of various wall thicknesses.
  9. The gas blast switch (30) as recited in any of the preceding claims, wherein the intermediate wall (10) in the longitudinal direction has at least one bar and/or one groove.
EP20030007854 2002-06-12 2003-04-05 Gas blast switch Expired - Lifetime EP1372172B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10226044 2002-06-12
DE2002126044 DE10226044A1 (en) 2002-06-12 2002-06-12 Air blast switch

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EP1372172A1 EP1372172A1 (en) 2003-12-17
EP1372172B1 EP1372172B1 (en) 2006-10-25
EP1372172B2 true EP1372172B2 (en) 2010-04-14

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4421331B2 (en) * 2004-02-26 2010-02-24 株式会社東芝 Gas circuit breaker
EP1780741B2 (en) * 2005-11-01 2013-03-06 ABB Technology Ltd Chambre d'interruption d'un interrupteur très haute tension avec un volume de chauffage pour l'admission de gaz sous pression
EP1796119A1 (en) * 2005-12-06 2007-06-13 ABB Research Ltd Interrupting chamber for high-voltage switch with a heating chamber for extinguishing gas reception
DE102009009451A1 (en) 2009-02-13 2010-08-19 Siemens Aktiengesellschaft Switchgear assembly with a switching path
DE102009009450A1 (en) 2009-02-13 2010-08-19 Siemens Aktiengesellschaft Switchgear arrangement
DE102011007103A1 (en) * 2011-04-11 2012-10-11 Siemens Aktiengesellschaft Electrical switching device
WO2015028264A2 (en) * 2013-08-28 2015-03-05 Abb Technology Ag Gas-insulated high-voltage switchgear

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DE3265381D1 (en) * 1981-06-12 1985-09-19 Bbc Brown Boveri & Cie High-voltage power circuit breaker
FR2558299B1 (en) * 1984-01-13 1987-03-20 Alsthom Atlantique HIGH VOLTAGE CIRCUIT BREAKER WITH ARC BLOWING
DE3810091A1 (en) * 1988-03-25 1989-10-05 Licentia Gmbh SF (DOWN ARROW) 6 (DOWN ARROW) PRESSURE SWITCH
DE3843405C1 (en) * 1988-12-23 1990-06-13 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De
DE3915700C3 (en) * 1989-05-13 1997-06-19 Aeg Energietechnik Gmbh Compressed gas switch with evaporative cooling
JPH04284319A (en) * 1991-03-13 1992-10-08 Hitachi Ltd Gas-blast circuit breaker
DE19613030A1 (en) * 1996-03-19 1997-09-25 Siemens Ag HV circuit-breaker design

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DE50305462D1 (en) 2006-12-07
DE10226044A1 (en) 2003-12-24
EP1372172A1 (en) 2003-12-17
EP1372172B1 (en) 2006-10-25

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