EP0016856B1 - Quench chamber for load disconnecting switches - Google Patents

Quench chamber for load disconnecting switches Download PDF

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Publication number
EP0016856B1
EP0016856B1 EP79103352A EP79103352A EP0016856B1 EP 0016856 B1 EP0016856 B1 EP 0016856B1 EP 79103352 A EP79103352 A EP 79103352A EP 79103352 A EP79103352 A EP 79103352A EP 0016856 B1 EP0016856 B1 EP 0016856B1
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EP
European Patent Office
Prior art keywords
quench
tube
housing
switch rod
accordance
Prior art date
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Expired
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EP79103352A
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German (de)
French (fr)
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EP0016856A1 (en
Inventor
Manfred Globig
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Concordia Sprecher GmbH
Concordia Sprecher Schaltgeraete GmbH
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Concordia Sprecher GmbH
Concordia Sprecher Schaltgeraete GmbH
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Priority to AT79103352T priority Critical patent/ATE3680T1/en
Publication of EP0016856A1 publication Critical patent/EP0016856A1/en
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Publication of EP0016856B1 publication Critical patent/EP0016856B1/en
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    • 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
    • H01H33/76—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor

Definitions

  • the invention relates to a quenching chamber for switch disconnectors, consisting of a tubular housing, a telescopically extendable arrangement of the quenching tube against the force of return springs and a switching pin located within the quenching tube, and a latching device controlled between the quenching tube depending on the extension path of the quenching tube and switching pin, which has at least one blocking member arranged displaceably in a radial guide of the extinguishing tube.
  • Quenching chambers of this type are generally known and are in large numbers in practical use. An example is shown in DE-A-1 221 335.
  • the latching device provided between the quenching tube and switching pin and which triggers according to a predetermined quenching tube pull-out path consists of blocking members which are spring-loaded, e.g. in the form of balls or pawls that interact with inclined surfaces or cams. Flawless operation must be required from these locking devices, since faulty switching can only be avoided if exact triggering and release times are guaranteed. Early release of the latching is particularly critical, since in this case the required distance from the main current path is not guaranteed.
  • the specification of a defined trigger point of the latching device is particularly critical with regard to the required long-term operation, since both the respective spring preloads and the accuracy of the respective grooves or cams affect the setting of the trigger point and, for example, both during production and Burr formation or signs of wear can occur in later operation that severely impair the functionality.
  • the invention has for its object to design an arcing chamber of the type defined in the introduction, while at the same time simplifying the overall structure, in such a way that the risk of incorrect switching, in particular due to premature release of the latching between the extinguishing tube and the switching pin, is practically eliminated.
  • the radial guide for the or each blocking member extends through the extinguishing tube wall, that the blocking member is guided between a coupling groove provided in the switching pin and a control wall of insulating material which limits the radial movement of the blocking member and that the control wall on the the end corresponding to the predefinable extinguishing tube extension path has at least the depth of engagement of the blocking member or the blocking members.
  • balls as the blocking element, a pair of balls being expediently arranged in each radial guide of the extinguishing tube designed as a bore.
  • CH-A-401 203 Another quenching chamber for switch disconnectors is known from CH-A-401 203, which has a latching device in which radial guides for blocking members in the form of two diametrically opposed balls extend through the quench tube wall.
  • these balls are pressed into a coupling groove by means of a spring, so that the release of this locking device also depends on the spring preload and the condition of the coupling groove.
  • the extinguishing tube is firmly connected to the housing and does not take part in the pull-out movement of the switching pin.
  • the side walls of the coupling groove and also the transition between the guide surfaces of the control wall, which are of different diameters, are preferably designed as inclined surfaces, which promotes the problem-free and smooth operation of the quenching chamber.
  • a particularly advantageous embodiment of an arcing chamber of the type defined at the outset is that the tubular housing consists of insulating material, that a current conducting path running along the inside of the housing is provided on the inner wall of the housing and that an opening in the opening between the current conducting path and the contact ring of the switching pin Extinguishing tube guided burn contact is arranged.
  • the use of a housing designed as a plastic tube is particularly advantageous because, compared to the conventional quenching chamber housing, the glow threshold voltage is higher and shorter distances to earth or to other live parts are possible.
  • the electrical conductor track which can preferably consist of a spring or a wire, is simple and economical and fulfills the tasks assigned to it flawlessly, since it can handle high currents, e.g. Currents of around 600 A, only during milliseconds.
  • a further aspect of the invention is that the burn-off contact is assigned essentially diametrically opposite a spring-loaded pressure element which is also guided in an opening of the extinguishing tube, this pressure element advantageously being cap-shaped and supported by means of a spring provided in the cap interior and supported on the tubular housing Ball can be biased radially inwards.
  • the ball belonging to the pressing element is preferably assigned a longitudinal guide groove in the inner wall of the housing, thereby ensuring that rotation of the extinguishing tube is prevented.
  • the construction of the extinguishing tube according to the invention thus brings about an increase in functional reliability, a substantial saving in weight and, moreover, enables a significantly more economical production in comparison with previous extinguishing tubes.
  • the extinguishing tube comprises a tubular housing 1 made of plastic, an extinguishing tube 2 arranged within this housing and a switching pin 3 arranged in the extinguishing tube 3.
  • a spring 4 is arranged between housing 1 and extinguishing tube 2 and a spring 5 between switching pin 3 and extinguishing tube 2. and these springs 4, 5 bias the extinguishing tube 2 and switching pin 3 against the direction of extension.
  • the contact pin 3 is provided in the usual manner at one end with a cooperating with the contact blades saddle l trontkopf 6 and at the other end with an eraser. 7
  • Extinguishing tube 2 and switching pin 3 are locked against each other, for which purpose the switching pin 3 has a coupling groove 8 in the region of its head-side end, into which blocking elements in spherical shape engage.
  • These balls 10, 11 forming blocking elements are arranged in a radial guide 9 which is preferably designed as a bore.
  • two balls 10, 11 are assigned to a radial guide 9, the outer ball 11 abutting a control wall 12, which is formed by a partially sleeve-shaped extension of the tubular housing 1 made of plastic.
  • This control wall 12 prevents radial expansion of the balls 10, 11 in the region of the predeterminable advance path of the extinguishing tube 2 and thus brings about a defined relative position of the extinguishing tube 2 and switching pin 3, i.e. a clear mutual locking.
  • a cross-sectional widening 13 is provided in the region of the free end of the part-sleeve-shaped control wall 12, and this cross-sectional widening enables the balls 10, 11 to move radially, with a jerk-free unlatching of the connection between the extinguishing tube 2 and the switching pin 3.
  • control wall 12 protrudes somewhat into the switching path, but this even has the advantage that an inserted separating plate can be brought into contact with this control wall 12, which consists of insulating material, and does not have to rest directly on parts carrying potential.
  • the current-carrying path running over the switching pin 3 comprises the contact ring 14 belonging to the switching pin 3, a burn-off contact 15 which bears against the contact ring 14 and is guided in an opening 16 in the extinguishing tube 2, and a current conducting path 17 which runs essentially along a surface line of the tubular housing 2 and which forms a Terminal lug 18 leads to an extinguishing pipe mounting bracket 19.
  • the current path 17 can consist of a spring or a wire.
  • the contact pressure between the burning contact 15 and the contact ring 14 is ensured by means of a pressing unit which is separate from the burning contact 15 and is essentially diametrically opposite provides, which consists of a cap-shaped element 20 guided in an opening of the extinguishing tube 2, inside which a compression spring 21 is arranged, which is supported by a ball 22 on the housing inner wall.
  • a pressing unit which is separate from the burning contact 15 and is essentially diametrically opposite provides, which consists of a cap-shaped element 20 guided in an opening of the extinguishing tube 2, inside which a compression spring 21 is arranged, which is supported by a ball 22 on the housing inner wall.
  • Both the pressing element and the burn-off contact are designed such that their radially outer end regions are held on the extinguishing tube wall and cannot fall inwards.
  • a metal mesh 23 made of rustproof material is arranged, and this cooling grille is held within a cap 24 by means of a star-shaped cover element 25, the bent-over tabs of which prevent burned particles of the metal mesh from falling into the quenching chamber. An occurring fusion of these mesh particles with the tabs of the holder is not a problem.
  • the mode of operation of the quenching chamber corresponds essentially to the mode of operation of the known quenching chambers of this type, ie that the switching pin 3 first takes along the quenching tube 2 via its advance path with compression of the spring 4, that the current runs over the flow guide described and at the end of the advance path the Latch between the extinguishing tube 2 and switching pin 3 is released.
  • the switching pin 3 is brought back via the spring 5 and the entire arrangement is returned to the starting position shown in the drawing with the locking of the extinguishing tube and switching pin.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Push-Button Switches (AREA)
  • Valve Device For Special Equipments (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Circuit Breakers (AREA)
  • Glass Compositions (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

A load disconnection switch incorporating a quench chamber is described which features a tube-like housing, a telescope-like arrangement of a quench tube and a switch rod guided for relative axial movement within the tube-like housing and releasably connected together by a coupling system the release of which is dependent on relative movement between the quench tube and the housing. The coupling system comprises at least one blocking device which is displaceably arranged in a respective radial guide in the wall of the quench tube and which engages in a recess provided in the switch rod. A control wall restricts the radial movement of the blocking device until, after a specified degree of relative movement between the tube-like housing and the coupled arrangement of quench tube and switch rod the restraint provided by the control wall is lifted and the ensuing relative movement of the quench tube and switch rod results in the current carrying path through the switch rod being interrupted at a spark contact and the heat generated at the spark contact causes the omission of quench gas from an associated quench rod which promptly extinguishes the arc. The spark contact is conveniently guided in an opening in the wall of the quench tube and a diametrically opposed pressure pad located at the other side of the switch rod ensures contact between the switch rod and the spark contact.

Description

Die Erfindung bezieht sich auf eine Löschkammer für Lasttrennschalter, bestehend aus einem rohrförmigen Gehäuse, einer in diesem Gehäuse geführten teleskopartig entgegen der Kraft von Rückstellfedern ausziehbaren Anordnung von Löschrohr und innerhalb des Löschrohres gelegenem Schaltstift, sowie einer in Abhängigkeit vom Ausziehweg des Löschrohrs gesteuerten Rastvorrichtung zwischen Löschrohr und Schaltstift, welche wenigstens ein in einer Radialführung des Löschrohrs verschiebbar angeordnetes Blockierorgan aufweist.The invention relates to a quenching chamber for switch disconnectors, consisting of a tubular housing, a telescopically extendable arrangement of the quenching tube against the force of return springs and a switching pin located within the quenching tube, and a latching device controlled between the quenching tube depending on the extension path of the quenching tube and switching pin, which has at least one blocking member arranged displaceably in a radial guide of the extinguishing tube.

Derartige Löschkammern sind allgemein bekannt und in großer Zahl im praktischen Einsatz. Ein Beispiel ist in der DE-A-1 221 335 gezeigt. Bei diesen bekannten Löschkammern besteht die zwischen Löschrohr und Schaltstift vorgesehene und nach einem vorgegebenen Löschrohr-Ausziehweg auslösende Rastvorrichtung aus unter Federvorspannung stehenden Blockierorganen, z.B. in Form von Kugeln oder Klinken, die mit Schrägflächen bzw. Nocken zusammenwirken. Von diesen Rastvorrichtungen muß eine einwandfreie Arbeitsweise gefordert werden, da nur bei Gewährleistung exakter Auslöse- bzw. Freigabezeitpunkte Fehlschaltungen vermieden werden können. Insbesondere kritisch ist eine vorzeitige Freigabe der Verrastung, da in diesem Falle der erforderliche Abstand der Hauptstrombahn nicht gewährleistet ist.Quenching chambers of this type are generally known and are in large numbers in practical use. An example is shown in DE-A-1 221 335. In these known quenching chambers, the latching device provided between the quenching tube and switching pin and which triggers according to a predetermined quenching tube pull-out path consists of blocking members which are spring-loaded, e.g. in the form of balls or pawls that interact with inclined surfaces or cams. Flawless operation must be required from these locking devices, since faulty switching can only be avoided if exact triggering and release times are guaranteed. Early release of the latching is particularly critical, since in this case the required distance from the main current path is not guaranteed.

Bei den bekannten Löschkammern ist die Vorgabe eines definierten Auslösepunktes der Rastvorrichtung insbesondere im Hinblick auf den geforderten Langzeitbetrieb kritisch, da sich auf die Einstellung des Auslösepunktes sowohl die jeweiligen Federvorspannungen als auch die Genauigkeit der jeweiligen Nuten oder Nocken auswirken und beispielsweise sowohl bei der Fertigung als auch im späteren Betrieb eine Gratbildung oder eine Verschleißerscheinung auftreten kann, die die Funktionsweise stark beeinträchtigt.In the known extinguishing chambers, the specification of a defined trigger point of the latching device is particularly critical with regard to the required long-term operation, since both the respective spring preloads and the accuracy of the respective grooves or cams affect the setting of the trigger point and, for example, both during production and Burr formation or signs of wear can occur in later operation that severely impair the functionality.

Bei der Anordnung der DE-A-1 221 335 wird während des Ausziehvorganges eine zwischen Löschrohr und Schaltstift gelegene Feder gespannt. Sobald die erzeugte Federkraft einen, der auf die Blockierorgane wirkenden Federvorspannung entsprechenden Wert erreicht, wird die Rastvorrichtung freigegeben, wodurch der Schaltstift unter der Einwirkung der zwischen ihm und dem Löschrohr gelegenen Feder schlagartig aus dem Löschrohr mit einer gleichzeitigen Trennung des zwischen diesen beiden Gliedern vorgesehenen Strompfades geschleudert wird. Es ist ersichtlich, daß die Größe der zur Freigabe der Rastvorrichtung benötigken Kraft sehr vom Zustand und den Herstellungstoleranzen der Rastvorrichtung abhängt. Da die Steigerung dieser Kraft proportional zu dem zurückgelegten Ausziehweg ist, bedeutet die Unsicherheit in der Größe der zur Freigabe benötigten Kraft gleichzeitig Unsicherheit in dem bis zur Freigabe zurückgelegten Ausziehweg und dementsprechend in dem bei der Freigabe erreichten Schaltabstand der Hauptstrombahn.In the arrangement of DE-A-1 221 335, a spring located between the extinguishing tube and switching pin is tensioned during the pull-out process. As soon as the spring force generated reaches a value corresponding to the spring preload acting on the blocking members, the locking device is released, whereby the switching pin under the action of the spring located between it and the extinguishing tube abruptly out of the extinguishing tube with a simultaneous separation of the current path provided between these two members is thrown. It can be seen that the magnitude of the force required to release the locking device depends very much on the condition and the manufacturing tolerances of the locking device. Since the increase in this force is proportional to the pull-out distance covered, the uncertainty in the size of the force required for the release also means uncertainty in the pull-out distance covered up to the release and accordingly in the switching distance of the main current path achieved during the release.

Der Erfindung liegt die Aufgabe zugrunde, eine Löschkammer der eingangs definierten Art unter gleichzeitiger Vereinfachung des Gesamtaufbaus so auszubilden, daß die Gefahr von Fehlschaltungen, insbesondere aufgrund verfrühter Lösung der Verrastung zwischen Löschrohr und Schaltstift praktisch beseitigt ist.The invention has for its object to design an arcing chamber of the type defined in the introduction, while at the same time simplifying the overall structure, in such a way that the risk of incorrect switching, in particular due to premature release of the latching between the extinguishing tube and the switching pin, is practically eliminated.

Gelöst wird diese Aufgabe gemäß der Erfindung dadurch, daß sich die Radialführung für das oder jedes Blockierorgan durch die Löschrohrwandung erstreckt, daß das Blockierorgan zwischen einer im Schaltstift vorgesehen Kupplungsrille und einer die Radialbewegung des Blockierorgans begrenzenden Steuerwandung aus Isoliermaterial geführt ist und daß die Steuerwandung an der dem Ende des vorgebbaren Löschrohr-Ausziehweges entsprechenden Stelle eine zumindest der Eingriffstiefe des Blockierorgans oder der Blockierorgane aufweist.This object is achieved according to the invention in that the radial guide for the or each blocking member extends through the extinguishing tube wall, that the blocking member is guided between a coupling groove provided in the switching pin and a control wall of insulating material which limits the radial movement of the blocking member and that the control wall on the the end corresponding to the predefinable extinguishing tube extension path has at least the depth of engagement of the blocking member or the blocking members.

Durch diese Maßnahmen wird erreicht, daß der Auslösezeitpunkt der Rastvorrichtung unabhängig von Federvorspannungen exakt vorgegeben werden kann und bedingt durch das klinken- und federunabhängige Auslöseprinzip eine ruckfreie Löschkammerbetätigung ermöglicht wird. Das Entfallen etwaiger, mit Toleranzen behafteter Vorspannungseinrichtungen für das Blockierorgan vereinfacht den Gesamtaufbau der Löschkammer.These measures ensure that the triggering time of the latching device can be specified exactly regardless of spring preloads and that a jerk-free actuation of the extinguishing chamber is made possible by the pawl and spring-independent triggering principle. The elimination of any prestressing devices with tolerances for the blocking member simplifies the overall structure of the arcing chamber.

Besonders vorteilhaft ist es, als Blockierorgan Kugeln zu verwenden, wobei zweckmäßigerweise in jeder als Bohrung ausgebildeten Radialführung des Löschrohrs ein Kugelpaar angeordnet ist.It is particularly advantageous to use balls as the blocking element, a pair of balls being expediently arranged in each radial guide of the extinguishing tube designed as a bore.

Die Verwendung von Kugeln erbringt eine besonders wirtschaftliche Lösung, führt zu geringeren Reibungswerten, schaltet jegliches störende Verkanten aus und schafft einen gedrängten Aufbau.The use of balls provides a particularly economical solution, leads to lower friction values, eliminates any annoying tilting and creates a compact structure.

Zwar ist eine weitere Löschkammer für Lasttrennschalter aus der CH-A--401 203 bekannt, welche eine Rastvorrichtung aufweist, bei der sich Radialführungen für Blockierorgane in Form von zwei einander diametral gegenüberliegenden Kugeln durch die Löschrohrwandung erstrecken. Diese Kugeln sind jedoch mittels einer Feder in eine Kuppelungsrille gedrückt, so daß die Freigabe dieser Rastvorrichtung auch von der Federvorspannung und dem Zustand der Kupplungsrille abhängig ist. Im übrigen ist bei dieser Anordnung das Löschrohr mit dem Gehäuse fest verbunden und nimmt an der Ausziehbewegung des Schaltstiftes nicht teil.Another quenching chamber for switch disconnectors is known from CH-A-401 203, which has a latching device in which radial guides for blocking members in the form of two diametrically opposed balls extend through the quench tube wall. However, these balls are pressed into a coupling groove by means of a spring, so that the release of this locking device also depends on the spring preload and the condition of the coupling groove. Moreover, in this arrangement, the extinguishing tube is firmly connected to the housing and does not take part in the pull-out movement of the switching pin.

Bei der erfindungsgemäßen Anordnung sind die Seitenwände der Kupplungsrille und auch der Übergang zwischen den auf unterschiedlichem Durchmesser liegenden Führungsflächen der Steuerwandung bevorzugt als Schrägflächen ausgebildet, wodurch die problemlose und ruckfreie Löschkammerbetätigung begünstigt wird. Die dabei erzielte hohe Funtionssicherheit ermöglicht es sogar, auf den bisher üblichen Prüfaufwand hinsichtlich des Auslösezeitpunktes zu verzichten.In the arrangement according to the invention the side walls of the coupling groove and also the transition between the guide surfaces of the control wall, which are of different diameters, are preferably designed as inclined surfaces, which promotes the problem-free and smooth operation of the quenching chamber. The high level of functional reliability achieved in this way even makes it possible to dispense with the usual testing effort with regard to the triggering time.

Eine besonders vorteilhafte Ausgestaltung einer Löschkammer der eingangs definierten Art besteht darin, daß das rohrförmige Gehäuse aus Isoliermaterial besteht, daß an der Innenwand des Gehäuses eine entlang der Gehäuseinnenseite verlaufende Stromleitbahn vorgesehen ist und daß zwischen dieser Stromleitbahn und dem Kontaktring des Schaltstiftes ein in einer Öffnung des Löschrohres geführter Abbrennkontakt angeordnet ist.A particularly advantageous embodiment of an arcing chamber of the type defined at the outset is that the tubular housing consists of insulating material, that a current conducting path running along the inside of the housing is provided on the inner wall of the housing and that an opening in the opening between the current conducting path and the contact ring of the switching pin Extinguishing tube guided burn contact is arranged.

Die Verwendung eines als Kunststoffrohr ausgebildeten Gehäuses ist vor allem deshalb vorteilhaft, weil im Vergleich zu den herkömmlichen Löschkammergehäuses die Glimmeinsatzspannung höher liegt und geringere Abstände gegen Erde oder zu anderen spannungführenden teilen möglich sind. Die Stromleitbahn, die vorzugsweise aus einer Feder oder einem Draht bestehen kann, ist einfach und wirtschaftlich und erfüllt die ihr zugeordneten Aufgaben einwandfrei, da sie mit hohen Strömen, z.B. Strömen von etwa 600 A, nur während Millisekunden belastet wird.The use of a housing designed as a plastic tube is particularly advantageous because, compared to the conventional quenching chamber housing, the glow threshold voltage is higher and shorter distances to earth or to other live parts are possible. The electrical conductor track, which can preferably consist of a spring or a wire, is simple and economical and fulfills the tasks assigned to it flawlessly, since it can handle high currents, e.g. Currents of around 600 A, only during milliseconds.

Eine weitere Augestaltung der Erfindung besteht darin, daß dem Abbrennkontakt im wesentlichen diametral gegenüberliegend ein unter Federvorspannung stehendes, ebenfalls in einer Öffnung des Löschrohres geführtes Andrückelement zugeordnet ist, wobei dieses Andrückelement zweckmäßigerweise kappenförmig ausgebildet und mittels iner im Kappeninnenraum vorgesehenen Feder und einer am rohrförmigen Gehäuse abgestützten Kugel radial nach innen vorgespannt sein kann.A further aspect of the invention is that the burn-off contact is assigned essentially diametrically opposite a spring-loaded pressure element which is also guided in an opening of the extinguishing tube, this pressure element advantageously being cap-shaped and supported by means of a spring provided in the cap interior and supported on the tubular housing Ball can be biased radially inwards.

Die Funktionstrennung zwischen der Erzeugung des Kontaktdruckes und der Stromführung wirkt sich in der Praxis besonders vorteilhaft aus.The separation of functions between the generation of the contact pressure and the current flow has a particularly advantageous effect in practice.

Der zum Andrückelement gehörenden Kugel ist bevorzugt in der Gehäuseinnenwand eine Längsführungsrille zugeordnet, wodurch sichergestellt ist, daß eine Drehung des Löschrohrs ausgeschlossen wird.The ball belonging to the pressing element is preferably assigned a longitudinal guide groove in the inner wall of the housing, thereby ensuring that rotation of the extinguishing tube is prevented.

Die erfindungsgemäße Konstruktion des Löschrohres erbringt somit eine Erhöhung der Funktionssicherheit, eine wesentliche Gewichtsersparnis und ermöglicht außerdem eine im Vergleich zu bisherigen Löschrohren wesentlich wirtschaftlichere Herstellung.The construction of the extinguishing tube according to the invention thus brings about an increase in functional reliability, a substantial saving in weight and, moreover, enables a significantly more economical production in comparison with previous extinguishing tubes.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung näher erläutert; die einzige Figur der Zeichnung zeigt eine Längsschnittansicht eines Löschrohrs im eingefahrenen Zustand.An embodiment of the invention is explained below with reference to the drawing; the only figure of the drawing shows a longitudinal sectional view of an extinguishing tube in the retracted state.

Das Löschrohr gemäß Zeichnung umfaßt ein aus Kunststoff bestehendes rohrförmiges Gehäuse 1, ein innerhalb diese Gehäuses angeordnetes Löschrohr 2 sowie einen im Löschrohr angeordneten Schaltstift 3. Zwischen Gehäuse 1 und Löschrohr 2 ist eine Feder 4 und zwischen Schaltstift 3 und Löschrohr 2 eine Feder 5 angeordnet, und diese Federn 4, 5 spannen Löschrohr 2 und Schaltstift 3 entgegen der Auszugsrichtung vor.The extinguishing tube according to the drawing comprises a tubular housing 1 made of plastic, an extinguishing tube 2 arranged within this housing and a switching pin 3 arranged in the extinguishing tube 3. A spring 4 is arranged between housing 1 and extinguishing tube 2 and a spring 5 between switching pin 3 and extinguishing tube 2. and these springs 4, 5 bias the extinguishing tube 2 and switching pin 3 against the direction of extension.

Der Schaltstift 3 ist in üblicher Weise an einem Ende mit einem mit den Schaltmessern zusammenwirkenden Schaltstiftkopf 6 und am anderen Ende mit einem Löschstift 7 versehen.The contact pin 3 is provided in the usual manner at one end with a cooperating with the contact blades saddle l tstiftkopf 6 and at the other end with an eraser. 7

Löschrohr 2 und Schaltstift 3 sind gegeneinander verrastet, wozu der Schaltstift 3 im Bereich seines kopfseitigen Endes eine Kupplungsrille 8 aufweist, in die Blockierelemente in Kugelform eingreifen. Diese Blockierelemente bildenden Kugeln 10, 11 sind in einer vorzugsweise als Bohrung ausgebildeten Radialführung 9 angeordnet.Extinguishing tube 2 and switching pin 3 are locked against each other, for which purpose the switching pin 3 has a coupling groove 8 in the region of its head-side end, into which blocking elements in spherical shape engage. These balls 10, 11 forming blocking elements are arranged in a radial guide 9 which is preferably designed as a bore.

Im dargestellten Ausführungsbeispiel sind jeweils einer Radialführung 9 zwei Kugeln 10, 11 zugeordnet, wobei die außenliegende Kugel 11 an einer Steuerwandung 12 anliegt, welche von einer teilhülsenförmigen Verlängerung des aus Kunststoff bestehenden rohrförmigen Gehäuses 1 gebildet wird.In the exemplary embodiment shown, two balls 10, 11 are assigned to a radial guide 9, the outer ball 11 abutting a control wall 12, which is formed by a partially sleeve-shaped extension of the tubular housing 1 made of plastic.

Diese Steuerwandung 12 verhindert im Bereich des vorgebbaren Vorlaufweges des Löschrohres 2 ein radiales Auswandern der Kugeln 10, 11 und bewirkt damit eine definierte Relativlage von Löschrohr 2 und Schaltstift 3, d.h. eine eindeutige gegenseitige Verrastung.This control wall 12 prevents radial expansion of the balls 10, 11 in the region of the predeterminable advance path of the extinguishing tube 2 and thus brings about a defined relative position of the extinguishing tube 2 and switching pin 3, i.e. a clear mutual locking.

Im Bereich des freien Endes der teilhüsenförmigen Steuerwandung 12 ist eine Querschnittserweiterung 13 vorgesehen, und diese Querschnittserweiterung ermöglicht ein radiales Auswandern der Kugeln 10, 11 verbunden mit einer ruckfreien Entrastung der Verbindung zwischen Löschrohr 2 und Schaltstift 3.A cross-sectional widening 13 is provided in the region of the free end of the part-sleeve-shaped control wall 12, and this cross-sectional widening enables the balls 10, 11 to move radially, with a jerk-free unlatching of the connection between the extinguishing tube 2 and the switching pin 3.

Die Steuerwandung 12 ragt zwar in der Praxis etwas in die Schaltstrecke hinein, aber dies erbringt sogar den Vorteil, daß eine eingeschobene Trennplatte an dieser aus Isoliermaterial bestehenden Steuerwandung 12 zur Anlage gebracht werden kann und nicht direkt auf Potential führenden Teilen aufliegen muß.In practice, the control wall 12 protrudes somewhat into the switching path, but this even has the advantage that an inserted separating plate can be brought into contact with this control wall 12, which consists of insulating material, and does not have to rest directly on parts carrying potential.

Die über den Schaltstift 3 verlaufende Stromführungsbahn umfaßt den zum Schaltstift 3 gehörenden Kontaktring 14, einen am Kontaktring 14 anliegenden und in einer Öffnung 16 des Löschrohres 2 geführten Abbrennkontakt 15 sowie eine im wesentlichen längs einer Mantellinie des rohrförmigen Gehäuses 2 verlaufende Stromleitbahn 17, die zu einer Anschlußfahne 18 an einer Löschrohr-Befestigungslasche 19 führt.The current-carrying path running over the switching pin 3 comprises the contact ring 14 belonging to the switching pin 3, a burn-off contact 15 which bears against the contact ring 14 and is guided in an opening 16 in the extinguishing tube 2, and a current conducting path 17 which runs essentially along a surface line of the tubular housing 2 and which forms a Terminal lug 18 leads to an extinguishing pipe mounting bracket 19.

Die Stromleitbahn 17 kann aus einer Feder oder einem Draht bestehen.The current path 17 can consist of a spring or a wire.

Der Kontaktdruck zwischen dem Abbrennkontakt 15 und dem Kontaktring 14 wird mittels einer vom Abbrennkontakt 15 getrennten und diesem im wesentlichen diametral gegenüberliegenden Andrückeinheit gewährleistet, die aus einem kappenförmigen, in einer Öffnung des Löschrohrs 2 geführten Element 20 besteht, in dessen Innerem eine Druckfeder 21 angeordnet ist, die über eine Kugel 22 an der Gehäuseinnenwand abgestützt ist. Sowohl das Andrückelement als auch der Abbrennkontakt sind so ausgebildet, daß sie mit ihren jeweils radial außenliegenden Endbereichen an der Löschrohrwandung gehalten werden und nicht nach innen fallen können.The contact pressure between the burning contact 15 and the contact ring 14 is ensured by means of a pressing unit which is separate from the burning contact 15 and is essentially diametrically opposite provides, which consists of a cap-shaped element 20 guided in an opening of the extinguishing tube 2, inside which a compression spring 21 is arranged, which is supported by a ball 22 on the housing inner wall. Both the pressing element and the burn-off contact are designed such that their radially outer end regions are held on the extinguishing tube wall and cannot fall inwards.

Im Löschgasaustrittsbereich ist bei der dargestellten Ausführungsform einer Löschkammer ein Metallgittergeflecht 23 aus nichtrostendem Material angeordnet, und dieses Kühlgitter wird innerhalb einer Kappe 24 mittels eines sternförmig ausgebildeten Abdeckelements 25 gehalten, dessen umgebogene Laschen verhindern, daß verbrannte Teilchen des Metallgeflechts in die Löschkammer fallen. Ein auftretendes Verschmelzen dieser Geflechsteilchen mit den Laschen der Halterung ist nicht störend.In the extinguishing gas outlet area in the illustrated embodiment of a quenching chamber, a metal mesh 23 made of rustproof material is arranged, and this cooling grille is held within a cap 24 by means of a star-shaped cover element 25, the bent-over tabs of which prevent burned particles of the metal mesh from falling into the quenching chamber. An occurring fusion of these mesh particles with the tabs of the holder is not a problem.

Die Funktionsweise der löschkammer entspricht im wesentlichen der Funktionsweise der bekannten Löschkammern dieser Art, d.h., daß der Schaltstift 3 zunächst das Löschrohr 2 über dessen Vorlaufweg unter Komprimierung der Feder 4 mitnimmt, daß dabei der Strom über die geschilderte Stromführungsbahn läuft und am Ende des Vorlaufwegs die Verrastung zwischen Löschrohr 2 und Schaltstift 3 gelöst wird. In diesem genau definierten Moment, bei dem die Kugeln 10, 11 radial nach außen gestoßen werden, erfolgt die Trennung der Stromführungsbahn im Löschrohr unter gleichzeitigem Beginn des Löschvorgangs. Nach Beendigung des Löschvorgangs und erfolgtem Abstreifen der Schaltmesser vom Schaltstiftkopf 6 wird der Schaltstift 3 über die Feder 5 wieder zurückgeholt und die Gesamtanordnung unter erneuter Verrastung von Löschrohr und Schaltstift in die in der Zeichnung gezeigte Ausgangsposition zurückgeführt.The mode of operation of the quenching chamber corresponds essentially to the mode of operation of the known quenching chambers of this type, ie that the switching pin 3 first takes along the quenching tube 2 via its advance path with compression of the spring 4, that the current runs over the flow guide described and at the end of the advance path the Latch between the extinguishing tube 2 and switching pin 3 is released. At this precisely defined moment, when the balls 10, 11 are pushed radially outwards, the current-carrying path in the extinguishing tube is separated while the extinguishing process begins at the same time. After the extinguishing process and the stripping of the switching knife from the switching pin head 6, the switching pin 3 is brought back via the spring 5 and the entire arrangement is returned to the starting position shown in the drawing with the locking of the extinguishing tube and switching pin.

Claims (12)

1. A quench chamber for load disconnection switches comprising a tubular housing (1), a telescope-like arrangement of a quench tube (2) and a switch rod (3) disposed within the quench tube (2), with the telescope-like arrangement being guided in the housing (1) and being capable of being drawn out of the housing against the force of resetting springs (4, 5), and also a latch device (8, 9, 10, 11, 12) between the quench tube (2) and the switch rod (3), with the latch device having at least one blocking member (10, 11) displaceably arranged in a radial guide (9) of the quench tube (2) and being controlled in dependence on the distance the quench tube (2) is pulled out of the housing, characterised in that the radial guide (9) for the blocking member (10, 11) extends through the quench tube wall, in that the or each blocking member (10, 11) is guided between a coupling groove (8) provided in the switch rod (3) and a control wall (12) of insulating material limiting the radial movement of the blocking member (10, 11), and in that the control wall (12) has an increase in cross-section (13) at a position corresponding to the end of the predeterminable distance by which the quench tube can be pulled out of the housing, with the increase in cross-section corresponding at least to the depth of engagement of the blocking member (10, 11), or of the blocking members, in the coupling groove (8).
2. A quench chamber in accordance with claim 1 and characterised in that at least two diametrically opposed balls (10, 11) are used as the blocking member.
3. A quench chamber in accordance with claim 1 or claim 2 and characterised in that a pair of balls (10, 11) is arranged in each radial guide (9) of the quench tube (2), with each radial guide (9) being formed as a bore.
4. A quench chamber in accordance with one of the preceding claims and characterised in that both the sidewalls of the coupling groove
(8) and also the transition between the guide surfaces of the control wall which lie at different diameters are formed as inclined surfaces.
5. A quench chamber in accordance with one of the preceding claims and characterised in that the coupling groove (8) is broader in the axial direction of the switch rod (3) than the diameter of the balls (10, 11).
6. A quench chamber in accordance with one of the preceding claims and characterised in that the tube-like housing (1) consists of insulating material and, in the form of a part sleeve-like extension, simultaneously forms the control wall.
7. A quench chamber in accordance with one of the claims 1 to 6 and characterised in that the tubular housing (1) consists of insulating material, in that a current conducting path (17) is provided at the inner wall of the housing (1) and extends along the inside of the housing, and in that a spark contact (15) guided in an opening (16) of the quench tube (2) is arranged between this current conducting path and the contact ring (14) of the switch rod (3).
8. A quench chamber in accordance with claim 7 and characterised in that the current conducting path (17) comprises a spring or a wire.
9. A quench chamber in accordance with claim 7 and characterised in that a spring biased pressure element (20), which is likewise guided in an opening of the quench tube (2), is associated with the spark contact (15) and is arranged diametrically opposite thereto.
10. A quench chamber in accordance with claim 9 and characterised in that the pressure element (20) is of cap-like form and is radially inwardly biased by means of a spring (21) provided in the inner space of the cap and a ball (22) braced against the tube-like housing (1).
11. A quench chamber in accordance with claim 10 and characterised in that a longitudinal guide groove in the inner wall of the housing is associated with the ball (22).
EP79103352A 1979-02-27 1979-09-07 Quench chamber for load disconnecting switches Expired EP0016856B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79103352T ATE3680T1 (en) 1979-02-27 1979-09-07 EXTINGUISHING CHAMBER FOR SWITCH-DISCONNECTOR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2907574A DE2907574C2 (en) 1979-02-27 1979-02-27 Extinguishing chamber
DE2907574 1979-02-27

Publications (2)

Publication Number Publication Date
EP0016856A1 EP0016856A1 (en) 1980-10-15
EP0016856B1 true EP0016856B1 (en) 1983-06-01

Family

ID=6064001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79103352A Expired EP0016856B1 (en) 1979-02-27 1979-09-07 Quench chamber for load disconnecting switches

Country Status (9)

Country Link
US (1) US4315120A (en)
EP (1) EP0016856B1 (en)
AT (1) ATE3680T1 (en)
BR (1) BR7906996A (en)
CA (1) CA1133035A (en)
CH (1) CH656250A5 (en)
DE (1) DE2907574C2 (en)
MX (1) MX146700A (en)
YU (2) YU39640B (en)

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Publication number Priority date Publication date Assignee Title
DE3111793A1 (en) * 1981-03-20 1982-09-30 Siemens AG, 1000 Berlin und 8000 München SWITCH DISCONNECTOR WITH A SWIVELING SWITCHING ARM AND WITH A DELETING DEVICE
DE3111792A1 (en) * 1981-03-20 1982-09-30 Siemens AG, 1000 Berlin und 8000 München SWITCH DISCONNECTOR WITH A DRIVE DEVICE FOR JUMPING SWITCHING ON AND OFF
DE3331024A1 (en) * 1983-08-27 1985-03-14 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt HIGH VOLTAGE DISCONNECTOR, ESPECIALLY SINGLE-COLUMN DISCONNECTOR, FOR SWITCHING COMMUTING CURRENTS
DE19809836C1 (en) * 1998-03-02 1999-09-09 Siemens Ag High-voltage circuit breaker with a switching rod made of an insulating material
CN109473301B (en) * 2018-09-12 2019-11-12 国网浙江省电力有限公司嘉兴供电公司 A kind of intelligent switch and its control method

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Also Published As

Publication number Publication date
YU39640B (en) 1985-03-20
MX146700A (en) 1982-07-30
BR7906996A (en) 1980-10-14
DE2907574C2 (en) 1984-05-17
CA1133035A (en) 1982-10-05
DE2907574A1 (en) 1980-08-28
EP0016856A1 (en) 1980-10-15
YU22279A (en) 1983-04-30
YU222279A (en) 1983-04-30
ATE3680T1 (en) 1983-06-15
US4315120A (en) 1982-02-09
CH656250A5 (en) 1986-06-13

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