EP1879207B1 - Rack and pinion gear for a switch - Google Patents

Rack and pinion gear for a switch Download PDF

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Publication number
EP1879207B1
EP1879207B1 EP06405301.0A EP06405301A EP1879207B1 EP 1879207 B1 EP1879207 B1 EP 1879207B1 EP 06405301 A EP06405301 A EP 06405301A EP 1879207 B1 EP1879207 B1 EP 1879207B1
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EP
European Patent Office
Prior art keywords
switch
monobloc
toothed rack
gear mechanism
interrupter unit
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.)
Active
Application number
EP06405301.0A
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German (de)
French (fr)
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EP1879207A1 (en
Inventor
Markus Vestner
Olaf Hunger
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.)
ABB Schweiz AG
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ABB Schweiz AG
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Publication date
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Priority to EP06405301.0A priority Critical patent/EP1879207B1/en
Priority to US11/826,018 priority patent/US7994442B2/en
Publication of EP1879207A1 publication Critical patent/EP1879207A1/en
Application granted granted Critical
Publication of EP1879207B1 publication Critical patent/EP1879207B1/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
    • H01H33/904—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 characterised by the transmission between operating mechanism and piston or movable contact
    • 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
    • H01H33/02—Details
    • H01H2033/028—Details the cooperating contacts being both actuated simultaneously in opposite directions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/40—Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing
    • 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

Definitions

  • the invention relates to the field of high voltage engineering, in particular the high voltage switch technology in electrical power distribution networks. It is based on an interrupter unit for a switching device and a switching device according to the preamble of the independent claims.
  • a circuit breaker is shown with a switch drive, which moves the first arcing contact piece and additionally drives the opposing second arcing contact piece via a hinged to the Isolierstoffdüse auxiliary gear.
  • the auxiliary gear has two gears, which cooperates with two parallel to the switch axis arranged racks or toothings.
  • the first racks are firmly connected to the insulating nozzle.
  • the second rack has two serrations and is connected to the arcing contact pin.
  • the auxiliary transmission comprises a mounting plate or holder, which receives the gear bearing and in turn is attached to the outer nominal current contact.
  • the auxiliary transmission further comprises a guide block, which receives the sliding guides for axial guidance of the arcing contact pin and in turn also on the outside Nominal current contact is attached.
  • the bracket and the guide block represent two separate modules that need to be inserted, aligned and mounted independently of each other in two steps in the switch.
  • an exact synchronization of the first two racks must be ensured because the first racks engage in the mutually aligned toothings of the same second rack and thereby both are frictionally coupled to the arcing contact pin. Therefore, the first racks must be adjusted to each other in alignment. The easiest way to do this is to install them at the same distance from their teeth to the insulating nozzle.
  • the sliding contact arrangement comprises a sliding contact ring, which is firmly connected to the arcing contact pin and is supported with its outer side on the inner surface of the surrounding contact tube and is slidably mounted along this.
  • the sliding contact ring is connected to the arcing contact pin via radial spokes.
  • the invention makes reference to the EP 0 907 195 in which an interrupter unit and a power switch with a double drive with auxiliary gear according to the preamble of claim 1 is disclosed.
  • the auxiliary transmission is on the drive side, that is arranged on the side of the first, driven by the primary drive contact system, and is located from the Düsenengnis from upstream and thus outside the exhaust flow. Because of the drive-side placement of the auxiliary transmission outboard tie rods for power transmission to the other contact side are necessary. These external tie rods must be accurately adjusted in their length and position prior to commissioning of the rack and pinion auxiliary transmission to ensure proper location of the tie rods to each other, their serrations to the associated gear, and proper spacing between the mutual contact systems.
  • Object of the present invention is to provide a simplified design for a switching device with double movement of the arcing contacts. This object is achieved according to the invention by the features of the independent claims.
  • the invention consists in an interrupter unit for an electrical switching device, in particular high voltage switch, for power supply networks, wherein the switching device comprises a central axis, a Isolierstoffdüse for arc blowing, a first contact system, a second contact system and a switch drive, which the first contact system and an auxiliary transmission the second contact system drives, wherein the auxiliary transmission has holding means and guide means for a rack drive, further wherein the auxiliary transmission comprises a monoblock, in which the support means and the guide means for the rack drive are integrated.
  • the monoblock construction reduces the number of components and simplifies the assembly and adjustment of the auxiliary gear in the switch.
  • a driver slide is embedded in driven by the auxiliary gear arcing contact piece.
  • the rack gear has exactly one gear, exactly one first rack for driving the gear and exactly one second rack for moving the second arcing contact.
  • Claims 9-10 relate to an electrical switching device with an arc interrupter unit as described above and with the advantages mentioned there.
  • Claim 11 relates to a method for mounting the interrupter unit in the switching device.
  • Fig. 1 shows for an electrical switching device 1, here for example for a circuit breaker 1, the arc-interrupter unit in a schematic and fragmentary representation.
  • the interrupter unit has a central axis 1a and at least one first contact system 2 an insulating nozzle 4 for blowing out an arc, a second contact system 3 and a switch drive, not shown.
  • the switch drive drives the first contact system 2 and via an auxiliary gear 5, ..., 11, the second contact system 3 at.
  • the contact parts 2, 3 are arranged concentrically with respect to the central axis 1a.
  • the first contact system 2 here comprises a first arcing contact 2a in the form of a contact tulip 2a and an outwardly disposed first rated current contact 2b in the form of a contact tube 2b.
  • the second contact system 3 here comprises a second arcing contact 3a in the form of a contact pin 3a and, externally, a second rated current contact 3b in the form of a contact tulip 3b.
  • the insulating material nozzle 4 is attached to the nominal current contact 2b by way of example on the first contact system 2. In addition to the main nozzle 4 and an auxiliary nozzle, not shown, may be present.
  • extinguishing gases flows into the arc zone between the arcing contacts 2a, 3a and inflates the arc.
  • the invention described below is applicable in any switch types with double movement of the contact system 2, 3 and in particular in self-blowing switches.
  • the auxiliary transmission 5 to 11 now comprises a monoblock 5, in which mounting means 5a and guide means 5b for the rack and pinion drive 6 to 8 are integrated.
  • the monoblock represents a monolithic assembly that can be assembled as a whole pre-assembled or with elements and can be mounted as a whole in the switch. In the following example embodiments are given.
  • the monoblock 5 should have a support part 5a, in which a bearing for at least one gear 6 of the rack drive 6 ... 8 is present; and / or the monobloc 5 should have in its guide part 5b a sliding guide 9, 11 and a sliding contact 10 for the auxiliary gear 5 ... 11 driven arcing contact piece 3a; and / or the monoblock 5 is intended to power removal from the arcing contact piece 3a be electrically connected to the external rated current contact 3b.
  • the monoblock 5 forms an assembly unit 5, which can be inserted into the switch 1 as a whole, and / or the monoblock 5 is formed in one piece.
  • the monoblock 5 may be a one-piece casting 5.
  • the monoblock 5 can have exactly one mounting flange 5c, which can be fastened to exactly one counter flange 5d of the switch 1.
  • a driver slide 11 is inserted directly in the driven by the auxiliary gear 5 ... 11 arcing contact piece 3a. This reduces the risk of tilting even with unilateral drive as described below.
  • a stationary sliding guide 9 for guiding the arcing contact piece 3a driven or drivable by the auxiliary gear 5... 11 in the guide part 5b of the monoblock 5 can be inserted.
  • This combination of features of the sliding guide 9, 11, in particular the combination of a driver slide 11 in the rear, the arc zone remote from the arc contact piece 3a with a stationary slide 9 in the front, the arc zone facing part of the arcing contact piece 3a can also regardless of the monobloc construction according to claim 1 be realized.
  • the rack gear 6 ... 8 exactly one gear 6, exactly a first rack 7 for driving the gear 6 and exactly a second rack 8 for moving the second arcing contact 3a. This eliminates adjustment screws for alignment alignment of multiple drive racks.
  • the insulating material 4 is movable and is used for power transmission from the switch drive to the auxiliary transmission 5 ... 11th
  • the first rack 7 is attached to the insulating material 4.
  • the first rack 7 is constructed so that it can be screwed into the insulating material nozzle 4 with an adjustable axial distance D of its toothing 7b to the insulating material nozzle 4.
  • the first rack 7 should have no adjustment screw for length adjustment of the first rack 7. In the construction with only one drive rack 7 can namely be waived on their length adjustment, provided that precisely defined distances between the insulating nozzle 4 and 7b toothing are met. This is particularly easy to implement in monoblock construction.
  • This abutment 30a, 50a can be realized by providing a shoulder 30a (protruding or recessed) on the arcing contact piece 3a, which cooperates with a counterpart 50a (recessed or protruding) on the monobloc 5 in such a way that the arc contact piece 3a is in the fully inserted state an end position is defined which corresponds to a desired, predeterminable distance to the opposite arcing contact piece 3b or to the insulating material nozzle 4.
  • the invention also provides an electrical switching device 1 for a power supply network with an interrupter unit as described above.
  • the switching device may in particular be a compressed gas switch or self-blowing switch; and / or a high voltage switch 1 or high current switch or general circuit breaker; and / or an outdoor switch, a sealed switch as a dead tank breaker or for a gas-insulated switchgear or a hybrid switch.
  • Another object of the invention relates to a method for mounting the switching device 1 with an interrupter unit as described above.
  • the insulating nozzle 4 pre-assembled with the at least one drive rack 7 in the switch 1.
  • the following assembly steps are carried out: (i) inserting the arcing contact piece 3a, which can be driven by the auxiliary gear 5 ... 11, into the monoblock 5 as far as the stop 30a, 50a; (ii) inserting the monobloc 5 into the switch 1 until the assembly device 5c, 5d comes together; and (iii) attaching the monoblock 5 by means of the mounting device 5c, 5d in the switch 1. Due to the monobloc design so the rack and pinion 6 ... 8 is particularly easy adjustable or adjustable.

Description

TECHNISCHES GEBIETTECHNICAL AREA

Die Erfindung bezieht sich auf das Gebiet der Hochspannungstechnik, insbesondere der Hochspannungsschaltertechnik in elektrischen Energieverteilnetzen. Sie geht aus von einer Unterbrechereinheit für ein Schaltgerät und von einem Schaltgerät gemäss Oberbegriff der unabhängigen Patentansprüche.The invention relates to the field of high voltage engineering, in particular the high voltage switch technology in electrical power distribution networks. It is based on an interrupter unit for a switching device and a switching device according to the preamble of the independent claims.

STAND DER TECHNIKSTATE OF THE ART

In der eigenen EP 0 313 813 A1 wird ein Leistungsschalter mit einem Schalterantrieb gezeigt, der das erste Lichtbogenkontaktstück bewegt und zusätzlich über ein an die Isolierstoffdüse angelenktes Hilfsgetriebe das gegenüberliegende zweite Lichtbogenkontaktstück antreibt. Das Hilfsgetriebe weist zwei Zahnräder auf, welche jeweils mit zwei parallel zur Schalterachse angeordneten Zahnstangen bzw. Zahnungen zusammenwirkt. Die ersten Zahnstangen sind mit der Isolierstoffdüse fest verbunden. Die zweite Zahnstange weist zwei Zahnungen auf und ist mit dem Lichtbogenkontaktstift verbunden. Durch axiale Bewegung der Isolierstoffdüse und ersten Zahnstangen werden die Zahnräder in Drehbewegung versetzt und dadurch die zweite Zahnstange gegenläufig axial angetrieben. Das Hilfsgetriebe umfasst eine Montageplatte oder Halterung, welche die Zahnradlager aufnimmt und ihrerseits am aussenliegenden Nominalstromkontakt befestigt ist. Das Hilfsgetriebe umfasst ferner einen Führungsblock, welcher die Gleitführungen zur axialen Führung des Lichtbogenkontaktstifts aufnimmt und seinerseits ebenfalls am aussenliegenden Nominalstromkontakt befestigt ist. Die Halterung und der Führungsblock stellen zwei separate Baugruppen dar, die in zwei Montageschritten unabhängig voneinander in den Schalter eingeschoben, ausgerichtet und montiert werden müssen. Zudem muss ein exakter Gleichlauf der beiden ersten Zahnstangen gewährleistet sein, da die ersten Zahnstangen in die zueinander fluchtend angeordneten Zahnungen der gleichen zweiten Zahnstange eingreifen und dadurch beide kraftschlüssig an den Lichtbogenkontaktstift angekoppelt sind. Deshalb müssen die ersten Zahnstangen zueinander fluchtend justiert werden. Dies geschieht am einfachsten dadurch, dass sie mit gleichem Abstand ihrer Zahnung zur Isolierstoffdüse montiert werden.In your own EP 0 313 813 A1 a circuit breaker is shown with a switch drive, which moves the first arcing contact piece and additionally drives the opposing second arcing contact piece via a hinged to the Isolierstoffdüse auxiliary gear. The auxiliary gear has two gears, which cooperates with two parallel to the switch axis arranged racks or toothings. The first racks are firmly connected to the insulating nozzle. The second rack has two serrations and is connected to the arcing contact pin. By axial movement of the Isolierstoffdüse and first racks, the gears are set in rotational motion, thereby driving the second rack in opposite directions axially. The auxiliary transmission comprises a mounting plate or holder, which receives the gear bearing and in turn is attached to the outer nominal current contact. The auxiliary transmission further comprises a guide block, which receives the sliding guides for axial guidance of the arcing contact pin and in turn also on the outside Nominal current contact is attached. The bracket and the guide block represent two separate modules that need to be inserted, aligned and mounted independently of each other in two steps in the switch. In addition, an exact synchronization of the first two racks must be ensured because the first racks engage in the mutually aligned toothings of the same second rack and thereby both are frictionally coupled to the arcing contact pin. Therefore, the first racks must be adjusted to each other in alignment. The easiest way to do this is to install them at the same distance from their teeth to the insulating nozzle.

In der eigenen EP 0 999 569 A1 ist eine Fortbildung des Schalters mit Zahnstangen-Doppelantrieb offenbart. Die Gleitkontaktanordnung umfasst einen Gleitkontaktring, der mit dem Lichtbogenkontaktstift fest verbunden ist und sich mit seiner Aussenseite an der Innenfläche des umgebenden Kontaktrohrs abstützt und entlang dieser gleitend gelagert ist. Der Gleitkontaktring ist mit dem Lichtbogenkontaktstift über radiale Speichen verbunden.In your own EP 0 999 569 A1 is disclosed a development of the switch with rack-and-pinion drive. The sliding contact arrangement comprises a sliding contact ring, which is firmly connected to the arcing contact pin and is supported with its outer side on the inner surface of the surrounding contact tube and is slidably mounted along this. The sliding contact ring is connected to the arcing contact pin via radial spokes.

Obwohl in EP 0 313 813 A1 und EP 0 999 569 A1 ein Hilfsgetriebe mit nur einem Zahnrad und jeweils nur einer Antriebszahnstange und angetriebener Zahnstange erwähnt ist, treten dabei bisher ungelöste Probleme mit einseitiger Belastung, Abnutzung oder Verkantung auf. Deshalb wird eine spiegelsymmetrische Anordnung mit zwei Zahnrädern und vier Zahnstangen als bevorzugt dargestellt und wurde bisher in der Praxis ausschliesslich verwendet.Although in EP 0 313 813 A1 and EP 0 999 569 A1 an auxiliary gear with only one gear and only one drive rack and driven rack is mentioned, so far unresolved problems occur with one-sided load, wear or tilting on. Therefore, a mirror-symmetrical arrangement with two gears and four racks is shown as preferred and has been used exclusively in practice.

In dem eigenen U. S. Pat. No. 5,478,980 ist eine weitere Variante des Schalters mit Zahnstangen-Doppelantrieb gezeigt. Die Montageplatte zur Aufnahme der Zahnräder ist über axial erstreckte Stützen am Führungsblock befestigt. Der Führungsblock enthält die Gleitführungen und ist seinerseits am aussenliegenden Nominalstromkontakt befestigt. Die Zahnstangen sind über Einstellschrauben in ihrer Länge verstellbar. Dadurch können die Antriebszahnstangen besser zueinander fluchtend justiert werden.In your own US Pat. 5,478,980 is shown a further variant of the switch with rack-double drive. The mounting plate for receiving the gears is mounted on the guide block via axially extended supports. The guide block contains the sliding guides and in turn is attached to the external nominal current contact. The racks are adjustable by adjusting screws in their length. This allows the drive racks are better aligned with each other aligned.

Die Erfindung nimmt Bezug auf die EP 0 907 195 , in welcher eine Unterbrechereinheit und ein Leistungsschalter mit einem Doppelantrieb mit Hilfsgetriebe gemäß Oberbegriff von Anspruch 1 offenbart ist. Das Hilfsgetriebe ist antriebsseitig, d.h. auf der Seite des ersten, vom Primärantrieb angetriebenen Kontaktsystems, angeordnet und liegt vom Düsenengnis aus gesehen stromaufwärts und damit ausserhalb der Abgasströmung. Wegen der antriebsseitigen Platzierung des Hilfsgetriebes sind aussenliegende Zugstangen zur Kraftübertragung auf die andere Kontaktseite notwendig. Diese aussenliegenden Zugstangen müssen vor Inbetriebnahme des Zahnstangen-Hilfsgetriebes in ihrer Länge und Position genau justiert werden, um eine korrekte Lage der Zugstangen zueinander, ihrer Zahnungen zum zugehörigen Zahnrad und eine korrekte Beabstandung zwischen den beiderseitigen Kontaktsystemen sicherzustellen.The invention makes reference to the EP 0 907 195 in which an interrupter unit and a power switch with a double drive with auxiliary gear according to the preamble of claim 1 is disclosed. The auxiliary transmission is on the drive side, that is arranged on the side of the first, driven by the primary drive contact system, and is located from the Düsenengnis from upstream and thus outside the exhaust flow. Because of the drive-side placement of the auxiliary transmission outboard tie rods for power transmission to the other contact side are necessary. These external tie rods must be accurately adjusted in their length and position prior to commissioning of the rack and pinion auxiliary transmission to ensure proper location of the tie rods to each other, their serrations to the associated gear, and proper spacing between the mutual contact systems.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

Aufgabe der vorliegenden Erfindung ist es, für ein Schaltgerät mit Doppelbewegung der Lichtbogenkontakte eine vereinfachte Bauweise anzugeben. Diese Aufgabe wird erfindungsgemäss durch die Merkmale der unabhängigen Ansprüche gelöst.Object of the present invention is to provide a simplified design for a switching device with double movement of the arcing contacts. This object is achieved according to the invention by the features of the independent claims.

Die Erfindung besteht in einer Unterbrechereinheit für ein elektrisches Schaltgerät, insbesondere Hochspannungsschalter, für Energieversorgungsnetze, wobei das Schaltgerät eine zentrale Achse, eine Isolierstoffdüse zur Lichtbogenbeblasung, ein erstes Kontaktsystem, ein zweites Kontaktsystem und einen Schalterantrieb umfasst, welcher das erste Kontaktsystem und über ein Hilfsgetriebe das zweite Kontaktsystem antreibt, wobei das Hilfsgetriebe Halterungsmittel und Führungsmittel für einen Zahnstangenantrieb aufweist, wobei ferner das Hilfsgetriebe einen Monoblock umfasst, in dem die Halterungsmittel und die Führungsmittel für den Zahnstangenantrieb integriert sind. Durch die Monoblockbauweise wird die Anzahl Bauteile reduziert und die Montage und Justierung des Hilfsgetriebes im Schalter vereinfacht.The invention consists in an interrupter unit for an electrical switching device, in particular high voltage switch, for power supply networks, wherein the switching device comprises a central axis, a Isolierstoffdüse for arc blowing, a first contact system, a second contact system and a switch drive, which the first contact system and an auxiliary transmission the second contact system drives, wherein the auxiliary transmission has holding means and guide means for a rack drive, further wherein the auxiliary transmission comprises a monoblock, in which the support means and the guide means for the rack drive are integrated. The monoblock construction reduces the number of components and simplifies the assembly and adjustment of the auxiliary gear in the switch.

In einem vorteilhaften Ausführungsbeispiel ist eine Mitnehmer-Gleitführung im durch das Hilfsgetriebe angetriebenen Lichtbogenkontaktstück eingelassen ist. Dadurch kann ein Verkanten des Lichtbogenkontaktstücks besonders wirksam und dauerhaft verhindert werden.In an advantageous embodiment, a driver slide is embedded in driven by the auxiliary gear arcing contact piece. As a result, tilting of the arcing contact piece can be prevented particularly effectively and permanently.

In einem weiteren vorteilhaften Ausführungsbeispiel weist das Zahnstangengetriebe genau ein Zahnrad, genau eine erste Zahnstange zum Antrieb des Zahnrads und genau eine zweite Zahnstange zum Bewegen des zweiten Lichtbogenkontaktes auf. Durch die Reduzierung auf genau ein Zahnrad, das mit genau einer Antriebszahnstange und genau einer Zahnung im Lichtbogenkontaktstück zusammenwirkt, wird eine grosse bauliche Vereinfachung des Hilfsgetriebes ohne Einbusse an Zuverlässigkeit des Schalterantriebs realisiert. In einem weiteren vorteilhaften Ausführungsbeispiel ist ein Anschlag für das durch das Hilfsgetriebe angetriebene Lichtbogenkontaktstück vorhanden. Dadurch entfallen beim Bestücken des Schalters mit dem Hilfsgetriebe komplizierte Justierungsmassnahmen am Zahnstangenantrieb.In a further advantageous embodiment, the rack gear has exactly one gear, exactly one first rack for driving the gear and exactly one second rack for moving the second arcing contact. By reducing to exactly one gear, which cooperates with exactly one drive rack and exactly one toothing in the arcing contact piece, a large structural simplification of the auxiliary gear is realized without loss of reliability of the switch drive. In a further advantageous embodiment, a stop for the driven by the auxiliary gear arc contact piece is present. This eliminates the need for fitting the switch with the auxiliary gear complicated adjustment measures on the rack drive.

Weitere Ausführungsbeispiele betreffen in Anspruch 2-3 konstruktive Ausgestaltungen des Monoblocks und seiner Halterung im Schalter und in Anspruch 6-7 konstruktive Ausgestaltungen des Zahnstangenantriebs.Further embodiments relate to claim 2-3 constructive embodiments of the monobloc and its mounting in the switch and in claims 6-7 constructive embodiments of the rack and pinion drive.

Anspruch 9-10 betreffen ein elektrisches Schaltgerät mit einer Lichtbogenunterbrechereinheit wie zuvor beschrieben und mit den dort genannten Vorteilen.Claims 9-10 relate to an electrical switching device with an arc interrupter unit as described above and with the advantages mentioned there.

Anspruch 11 betrifft ein Verfahren zur Montage der Unterbrechereinheit im Schaltgerät.Claim 11 relates to a method for mounting the interrupter unit in the switching device.

Weitere Ausführungen, Vorteile und Anwendungen der Erfindung ergeben sich aus den abhängigen Ansprüchen, aus den Anspruchskombinationen und aus der nun folgenden Beschreibung und den Figuren.Further embodiments, advantages and applications of the invention will become apparent from the dependent claims, from the claim combinations and from the following description and the figures.

KURZE BESCHREIBUNG DER ZEICHNUNGENBRIEF DESCRIPTION OF THE DRAWINGS

Es zeigen beispielhaft und schematisch

Fig. 1
ein Schaltgerät mit Hilfsgetriebe für doppelbewegte Lichtbogenkontakte; und
Fig. 2
eine Detailansicht zu Fig. 1.
They show by way of example and schematically
Fig. 1
a switching device with auxiliary gear for double-moving arcing contacts; and
Fig. 2
a detailed view too Fig. 1 ,

In den Figuren sind gleiche oder gleichwirkende Teile mit gleichen oder ähnlichen Bezugszeichen versehen.In the figures, identical or equivalent parts are provided with the same or similar reference numerals.

WEGE ZUR AUSFÜHRUNG DER ERFINDUNGWAYS FOR CARRYING OUT THE INVENTION

Fig. 1 zeigt für ein elektrisches Schaltgerät 1, hier beispielhaft für einen Leistungsschalter 1, die Löschbogen-Unterbrechereinheit in schematischer und ausschnittweiser Darstellung. Die Unterbrechereinheit weist eine zentrale Achse 1a und mindestens ein erstes Kontaktsystem 2 mit einer Isolierstoffdüse 4 zur Beblasung eines Lichtbogens, ein zweites Kontaktsystem 3 und einen nicht dargestellten Schalterantrieb auf. Der Schalterantrieb treibt das erste Kontaktsystem 2 und über ein Hilfsgetriebe 5, ..., 11 das zweite Kontaktsystem 3 an. Typischerweise sind die Kontaktteile 2, 3 konzentrisch bezüglich der zentralen Achse 1a angeordnet. Das erste Kontaktsystem 2 umfasst hier einen ersten Lichtbogenkontakt 2a in Form einer Kontakttulpe 2a und einen aussenliegend angeordneten ersten Nennstromkontakt 2b in Form eines Kontaktrohrs 2b. Das zweite Kontaktsystem 3 umfasst hier einen zweiten Lichtbogenkontakt 3a in Form eines Kontaktstifts 3a und aussenliegend einen zweiten Nennstromkontakt 3b in Form einer Kontakttulpe 3b. Die Isolierstoffdüse 4 ist beispielhaft am ersten Kontaktsystem 2 am Nennstromkontakt 2b befestigt. Neben der Hauptdüse 4 kann auch eine nicht dargestellte Hilfsdüse vorhanden sein. Im Schaltfall strömt Löschgase in die Lichtbogenzone zwischen den Lichtbogenkontakten 2a, 3a ein und bebläst den Lichtbogen. Es sei darauf hingewiesen, dass die im folgenden beschriebene Erfindung in beliebigen Schaltertypen mit Doppelbewegung der Kontaktsystem 2, 3 und insbesondere in Selbstblasschaltern anwendbar ist. Fig. 1 shows for an electrical switching device 1, here for example for a circuit breaker 1, the arc-interrupter unit in a schematic and fragmentary representation. The interrupter unit has a central axis 1a and at least one first contact system 2 an insulating nozzle 4 for blowing out an arc, a second contact system 3 and a switch drive, not shown. The switch drive drives the first contact system 2 and via an auxiliary gear 5, ..., 11, the second contact system 3 at. Typically, the contact parts 2, 3 are arranged concentrically with respect to the central axis 1a. The first contact system 2 here comprises a first arcing contact 2a in the form of a contact tulip 2a and an outwardly disposed first rated current contact 2b in the form of a contact tube 2b. The second contact system 3 here comprises a second arcing contact 3a in the form of a contact pin 3a and, externally, a second rated current contact 3b in the form of a contact tulip 3b. The insulating material nozzle 4 is attached to the nominal current contact 2b by way of example on the first contact system 2. In addition to the main nozzle 4 and an auxiliary nozzle, not shown, may be present. In the switching case, extinguishing gases flows into the arc zone between the arcing contacts 2a, 3a and inflates the arc. It should be noted that the invention described below is applicable in any switch types with double movement of the contact system 2, 3 and in particular in self-blowing switches.

Erfindungsgemäss umfasst nun das Hilfsgetriebe 5 bis 11 einen Monoblock 5, in dem Halterungsmittel 5a und Führungsmittel 5b für den Zahnstangenantrieb 6 bis 8 integriert sind. Der Monoblock stellt eine monolithische Baugruppe dar, die als Ganzes vormontierbar bzw. mit Elementen bestückbar ist und als Ganzes im Schalter montierbar ist. Im folgenden werden hierzu Ausführungsbeispiele angegeben.According to the invention, the auxiliary transmission 5 to 11 now comprises a monoblock 5, in which mounting means 5a and guide means 5b for the rack and pinion drive 6 to 8 are integrated. The monoblock represents a monolithic assembly that can be assembled as a whole pre-assembled or with elements and can be mounted as a whole in the switch. In the following example embodiments are given.

Der Monoblock 5 soll einen Halterungsteil 5a aufweisen, in dem ein Lager für mindestens ein Zahnrad 6 des Zahnstangenantriebs 6...8 vorhanden ist; und/oder der Monoblock 5 soll in seinem Führungsteil 5b eine Gleitführung 9, 11 und einen Gleitkontakt 10 für das vom Hilfsgetriebe 5...11 angetriebene Lichtbogenkontaktstück 3a aufweisen; und/oder der Monoblock 5 soll zur Stromabnahme vom Lichtbogenkontaktstück 3a mit dem aussenliegenden Nennstromkontakt 3b elektrisch leitend verbunden sein.The monoblock 5 should have a support part 5a, in which a bearing for at least one gear 6 of the rack drive 6 ... 8 is present; and / or the monobloc 5 should have in its guide part 5b a sliding guide 9, 11 and a sliding contact 10 for the auxiliary gear 5 ... 11 driven arcing contact piece 3a; and / or the monoblock 5 is intended to power removal from the arcing contact piece 3a be electrically connected to the external rated current contact 3b.

Mit Vorteil bildet der Monoblock 5 eine Montageeinheit 5, die gesamthaft in den Schalter 1 einsetzbar ist, und/oder ist der Monoblock 5 einstückig ausgebildet. Insbesondere kann der Monoblock 5 ein einstückiges Gussteil 5 sein.Advantageously, the monoblock 5 forms an assembly unit 5, which can be inserted into the switch 1 as a whole, and / or the monoblock 5 is formed in one piece. In particular, the monoblock 5 may be a one-piece casting 5.

Für eine besonders einfache Montierbarkeit des Monoblocks 5 am Schalter 1 ist lediglich eine einzige Montagevorrichtung 5c, 5d vorhanden. Wie beispielhaft dargestellt kann der Monoblock 5 genau einen Montageflansch 5c aufweisen, welcher an genau einem Gegenflansch 5d des Schalters 1 befestigbar ist.For a particularly simple mountability of the monoblock 5 on the switch 1, only a single mounting device 5c, 5d is present. As shown by way of example, the monoblock 5 can have exactly one mounting flange 5c, which can be fastened to exactly one counter flange 5d of the switch 1.

In einer vorteilhaften Ausgestaltung ist eine Mitnehmer-Gleitführung 11 direkt im durch das Hilfsgetriebe 5...11 angetriebenen Lichtbogenkontaktstück 3a eingelassen. Dies vermindert die Gefahr von Verkantung auch bei einseitigem Antrieb wie weiter unten beschrieben. Alternativ oder ergänzend kann eine stationäre Gleitführung 9 zur Führung des durch das Hilfsgetriebe 5...11 angetriebenen bzw. antreibbaren Lichtbogenkontaktstücks 3a im Führungsteil 5b des Monoblocks 5 eingelassen sein. Diese Merkmalskombination der Gleitführung 9, 11, besonders die Kombination einer Mitnehmer-Gleitführung 11 im hinteren, der Lichtbogenzone abgewandten Teil des Lichtbogenkontaktstücks 3a mit einer stationären Gleitführung 9 im vorderen, der Lichtbogenzone zugewandten Teil des Lichtbogenkontaktstücks 3a, kann auch unabhängig von der Monoblockbauweise gemäß Anspruch 1 realisiert sein.In an advantageous embodiment, a driver slide 11 is inserted directly in the driven by the auxiliary gear 5 ... 11 arcing contact piece 3a. This reduces the risk of tilting even with unilateral drive as described below. Alternatively or additionally, a stationary sliding guide 9 for guiding the arcing contact piece 3a driven or drivable by the auxiliary gear 5... 11 in the guide part 5b of the monoblock 5 can be inserted. This combination of features of the sliding guide 9, 11, in particular the combination of a driver slide 11 in the rear, the arc zone remote from the arc contact piece 3a with a stationary slide 9 in the front, the arc zone facing part of the arcing contact piece 3a, can also regardless of the monobloc construction according to claim 1 be realized.

In einer weiteren vorteilhaften Ausgestaltung weist das Zahnstangengetriebe 6...8 genau ein Zahnrad 6, genau eine erste Zahnstange 7 zum Antrieb des Zahnrads 6 und genau eine zweite Zahnstange 8 zum Bewegen des zweiten Lichtbogenkontaktes 3a auf. Dadurch entfallen Einstellschrauben zur fluchtenden Justierung mehrerer Antriebszahnstangen.In a further advantageous embodiment, the rack gear 6 ... 8 exactly one gear 6, exactly a first rack 7 for driving the gear 6 and exactly a second rack 8 for moving the second arcing contact 3a. This eliminates adjustment screws for alignment alignment of multiple drive racks.

Mit Vorteil ist die Isolierstoffdüse 4 bewegbar und dient zur Kraftübertragung vom Schalterantrieb auf das Hilfsgetriebe 5...11. Dabei ist die erste Zahnstange 7 an der Isolierstoffdüse 4 befestigt. Bevorzugt ist die erste Zahnstange 7 so gebaut, dass sie mit einstellbarem axialen Abstand D ihrer Zahnung 7b zur Isolierstoffdüse 4 in die Isolierstoffdüse 4 einschraubbar ist. Desweiteren soll die erste Zahnstange 7 keine Einstellschraube zur Längeneinstellung der ersten Zahnstange 7 aufweisen. Bei der Bauweise mit nur einer Antriebszahnstange 7 kann nämlich auch auf deren Längenjustierung verzichtet werden, sofern genau definierte Abstände zwischen Isolierstoffdüse 4 und Zahnung 7b eingehalten sind. Dies ist besonders einfach in der Monoblockbauweise realisierbar.Advantageously, the insulating material 4 is movable and is used for power transmission from the switch drive to the auxiliary transmission 5 ... 11th In this case, the first rack 7 is attached to the insulating material 4. Preferably, the first rack 7 is constructed so that it can be screwed into the insulating material nozzle 4 with an adjustable axial distance D of its toothing 7b to the insulating material nozzle 4. Furthermore, the first rack 7 should have no adjustment screw for length adjustment of the first rack 7. In the construction with only one drive rack 7 can namely be waived on their length adjustment, provided that precisely defined distances between the insulating nozzle 4 and 7b toothing are met. This is particularly easy to implement in monoblock construction.

Hierfür ist in einer vorteilhaften Ausführungsform ein Anschlag 30a, 50a für das durch das Hilfsgetriebe 5...11 angetriebene Lichtbogenkontaktstück 3a vorhanden. Dieser Anschlag 30a, 50a kann dadurch realisiert sein, dass ein Absatz 30a (vorstehend oder eingelassen) am Lichtbogenkontaktstück 3a vorhanden ist, der mit einem Gegenabsatz 50a (eingelassen oder vorstehend) am Monoblock 5 so zusammenwirkt, dass für das Lichtbogenkontaktstück 3a im voll eingeschobenen Zustand eine Endposition definiert ist, welche einem gewünschten, vorgebbaren Abstand zum gegenüberliegend Lichtbogenkontaktstück 3b bzw. zur Isolierstoffdüse 4 entspricht.For this purpose, in an advantageous embodiment, a stop 30a, 50a for the driven by the auxiliary gear 5 ... 11 arcing contact piece 3a available. This abutment 30a, 50a can be realized by providing a shoulder 30a (protruding or recessed) on the arcing contact piece 3a, which cooperates with a counterpart 50a (recessed or protruding) on the monobloc 5 in such a way that the arc contact piece 3a is in the fully inserted state an end position is defined which corresponds to a desired, predeterminable distance to the opposite arcing contact piece 3b or to the insulating material nozzle 4.

Gegenstand der Erfindung ist auch ein elektrisches Schaltgerät 1 für ein Energieversorgungsnetz mit einer Unterbrechereinheit wie zuvor beschrieben. Das Schaltgerät kann insbesondere ein Druckgasschalter oder Selbstblasschalter sein; und/oder ein Hochspannungsschalter 1 oder Hochstromschalter oder allgemein Leistungsschalter; und/oder ein Freiluftschalter, eine gekapselter Schalter als Dead Tank Breaker oder für eine gasisolierte Schaltanlage oder ein Hybridschalter.The invention also provides an electrical switching device 1 for a power supply network with an interrupter unit as described above. The switching device may in particular be a compressed gas switch or self-blowing switch; and / or a high voltage switch 1 or high current switch or general circuit breaker; and / or an outdoor switch, a sealed switch as a dead tank breaker or for a gas-insulated switchgear or a hybrid switch.

Ein weiterer Gegenstand der Erfindung betrifft ein Verfahren zur Montage des Schaltgeräts 1 mit einer Unterbrechereinheit wie zuvor beschrieben. Dabei ist die Isolierstoffdüse 4 mit der mindestens einen Antriebszahnstange 7 im Schalter 1 vormontiert. Erfindungsgemäss werden folgende Montageschritte ausgeführt: (i) Einschieben des durch das Hilfsgetriebe 5...11 antreibbaren Lichtbogenkontaktstücks 3a bis zum Anschlag 30a, 50a in den Monoblock 5; (ii) Einschieben des Monoblocks 5 in den Schalter 1 bis zum Zusammenkommen der Montagevorrichtung 5c, 5d; und (iii) Befestigen des Monoblocks 5 mittels der Montagevorrichtung 5c, 5d im Schalter 1. Aufgrund der Monoblockbauweise ist also das Zahnstangengetriebe 6...8 besonders einfach einstellbar bzw. justierbar.Another object of the invention relates to a method for mounting the switching device 1 with an interrupter unit as described above. Here is the insulating nozzle 4 pre-assembled with the at least one drive rack 7 in the switch 1. According to the invention, the following assembly steps are carried out: (i) inserting the arcing contact piece 3a, which can be driven by the auxiliary gear 5 ... 11, into the monoblock 5 as far as the stop 30a, 50a; (ii) inserting the monobloc 5 into the switch 1 until the assembly device 5c, 5d comes together; and (iii) attaching the monoblock 5 by means of the mounting device 5c, 5d in the switch 1. Due to the monobloc design so the rack and pinion 6 ... 8 is particularly easy adjustable or adjustable.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

11
Elektrisches Schaltgerät, Hochspannungsschalter, LeistungsschalterElectrical switching device, high voltage switch, circuit breaker
1a1a
Zentrale Achse, SchalterachseCentral axis, switch axis
22
Erstes Kontaktsystem (mit Isolierstoffdüse)First contact system (with insulating nozzle)
2a2a
Erster Lichtbogenkontakt, LichtbogenkontakttulpeFirst arc contact, arc contact tulip
2b2 B
Erster Nennstromkontakt, KontaktrohrFirst rated current contact, contact tube
33
Zweites Kontaksystem, GegenkontaktsystemSecond contact system, mating contact system
3a3a
Zweiter Lichtbogenkontakt, LichtbogenkontaktstiftSecond arcing contact, arcing contact pin
30a30a
Anschlagattack
3b3b
Zweiter Nennstromkontakt, NennstromkontakttulpeSecond rated current contact, rated current contact tulip
44
Isolierstoffdüseinsulating
5 bis 115 to 11
Hilfsgetriebeauxiliary transmission
55
Getriebeblock (monolithisch)Gear block (monolithic)
5a5a
Halterungsteil, Halterung für Zahnradlager, MontageplatteMounting part, mount for gear bearing, mounting plate
50a50a
Gegenanschlagcounterstop
5b5b
Führungsmittel, Führungsteil für LichtbogenkontaktGuide means, guide member for arcing contact
5c, 5d5c, 5d
Montagevorrichtungmounter
5c5c
Auskragung, MontageflanschProjection, mounting flange
5d5d
Auskragung, GegenflanschProjection, counterflange
6 bis 86 to 8
ZahnstangenantriebRack and pinion drive
66
Zahnradgear
6a6a
Zahnradachse, ZahnradlagerGear axle, gear bearing
77
Erste Zahnstange, AntriebszahnstangeFirst rack, drive rack
7a7a
Verschraubung, EinstellschraubeScrew connection, adjusting screw
7b7b
ZahnungPerforation
7c7c
Lagercamp
88th
Zweite Zahnstange, angetriebene ZahnstangeSecond rack, powered rack
99
Erster Lagerring, stationäre GleitführungFirst bearing ring, stationary sliding guide
1010
Gleitkontaktsliding contact
1111
Zweiter Lagerring, Mitnehmer-GleitführungSecond bearing ring, follower sliding guide
DD
Axiale Distanz Zahnung - IsolierstoffdüseAxial distance toothing - insulating nozzle

Claims (11)

  1. Interrupter unit for an electrical switching device (1) for power supply systems, in particular high-voltage switch (1), wherein the switching device (1) comprises a central axis (1a), a first contact system (2), an insulating-material nozzle (4) for arc blowing, a second contact system (3) and a switch drive which drives the first contact system (2) and, by means of an auxiliary gear mechanism (5... 11), the second contact system (3), wherein the auxiliary gear mechanism (5...11) has a holding part (5a) and a guide part (5b) for a toothed rack drive (6... 8), wherein the auxiliary gear mechanism (5...11) comprises a monobloc (5) in which the holding part (5a) and the guide part (5b) for the toothed rack drive (6... 8) are integrated, wherein the monobloc (5) has, in its holding part (5a), a bearing for at least one gear wheel, characterized in that
    a) the monobloc (5) has, in its guide part (5b), a sliding guide (9, 11) and a sliding contact (10) for the arc contact piece (3a) which is driven by the auxiliary gear mechanism (5... 11), and
    b) the monobloc (5) is electrically conductively connected to the external rated-current contact (3b) for drawing current from the arc contact piece (3a).
  2. The interrupter unit according to one of the preceding claims, characterized in that
    a) the monobloc (5) forms an assembly unit (5) which can be inserted in its entirety into the switch (1), and/or
    b) the monobloc (5) is integrally formed and is, in particular, an integral cast part.
  3. The interrupter unit according to either of the preceding claims, characterized in that
    a) a single assembly apparatus (5c, 5d) is provided for fastening the monobloc (5) to the switch (1), and
    b) in particular in that the monobloc (5) has precisely one assembly flange (5c) which can be fastened to precisely one mating flange (5d) of the switch (1).
  4. The interrupter unit according to one of the preceding claims, characterized in that
    a) the sliding guide (9, 11) comprises a driver sliding guide (11) which is incorporated in the arc contact piece (3a) which is driven by the auxiliary gear mechanism (5... 11), and/or
    b) the sliding guide (9, 11) comprises a stationary sliding guide (9) which is incorporated in the guide part (5b) of the monobloc (5) for the purpose of guiding the arc contact piece (3a) which is driven by the auxiliary gear mechanism (5... 11).
  5. The interrupter unit according to one of the preceding claims, characterized in that the rack-and-pinion gear mechanism (6...8) has precisely one gear wheel (6), precisely one first toothed rack (7) for driving the gear wheel (6), and precisely one second toothed rack (8) for moving the second arc contact (3a).
  6. The interrupter unit according to one of the preceding claims, characterized in that
    a) the insulating-material nozzle (4) can be moved and serves to transmit force from the switch drive to the auxiliary gear mechanism (5...11), and
    b) the first toothed rack (7) is fastened to the insulating-material nozzle (4) and acts as a drive toothed rack (7).
  7. The interrupter unit according to Claim 6, characterized in that
    a) the first toothed rack (7) can be screwed into the insulating-material nozzle (4) with an adjustable axial distance (D) between the tooth system (7b) of said toothed rack and the insulating-material nozzle (4), and/or
    b) the first toothed rack (7) does not have an adjusting screw for adjusting the length of the first toothed rack (7).
  8. The interrupter unit according to one of the preceding claims, characterized in that
    a) there is a stop (30a, 50a) for the arc contact piece (3a) which is driven by the auxiliary gear mechanism (5... 11), and
    b) in particular in that the stop (30a, 50a) is realized by a projection (30a) in the arc contact piece (3a) and a mating projection (50a), which interacts with said projection, in the monobloc (5).
  9. Electrical switching device (1) for a power supply system, characterized by an interrupter unit according to one of the preceding claims.
  10. Electrical switching device (1) according to Claim 9, characterized in that the switching device (1)
    a) is a compressed-gas switch and, in particular, a self-blowing switch, and/or
    b) is a high-voltage switch (1) or high-current switch, and/or
    c) is an outdoor switch, an encapsulated switch for a dead tank breaker or for a gas-insulated switchgear assembly or a hybrid switch.
  11. Method for assembling a switching device (1) comprising an interrupter unit according to one of Claims 1-8, wherein the insulating-material nozzle (4) is premounted in the switch (1) with the drive toothed rack (7), characterized by the steps of:
    a) pushing the arc contact piece (3a), which can be driven by the auxiliary gear mechanism (5... 11), into the monobloc (5) as far as a stop (30a, 50a),
    b) pushing the monobloc (5) into the switch (1) until an assembly apparatus (5c, 5d) comes together, and
    c) fastening the monobloc (5) in the switch (1) by means of the assembly apparatus (5c, 5d).
EP06405301.0A 2006-07-12 2006-07-12 Rack and pinion gear for a switch Active EP1879207B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06405301.0A EP1879207B1 (en) 2006-07-12 2006-07-12 Rack and pinion gear for a switch
US11/826,018 US7994442B2 (en) 2006-07-12 2007-07-11 Rack gear for electrical circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06405301.0A EP1879207B1 (en) 2006-07-12 2006-07-12 Rack and pinion gear for a switch

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EP1879207A1 EP1879207A1 (en) 2008-01-16
EP1879207B1 true EP1879207B1 (en) 2017-04-19

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US9054530B2 (en) 2013-04-25 2015-06-09 General Atomics Pulsed interrupter and method of operation
CN104599867B (en) * 2015-02-02 2017-05-17 广东金晖隆开关有限公司 Sliding contact used for high-voltage electric appliances
DE102015214485A1 (en) * 2015-07-30 2017-02-16 Siemens Aktiengesellschaft Arrangement and a method for driving an electrical switching device
CN105023797B (en) * 2015-08-07 2017-04-19 广州晨力发电设备科技有限公司 Vacuum circuit breaker
KR101722976B1 (en) * 2015-08-20 2017-04-05 현대중공업 주식회사 Gas isolated circuit breaker
KR101702538B1 (en) * 2015-08-20 2017-02-06 현대중공업 주식회사 Gas isolated circuit breaker
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CN112635230B (en) * 2020-10-21 2023-03-31 平高集团有限公司 Circuit breaker and double-acting arc extinguishing chamber
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US7994442B2 (en) 2011-08-09
EP1879207A1 (en) 2008-01-16
US20080047813A1 (en) 2008-02-28

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