EP0811998A1 - Gas blast switch with a braking device - Google Patents

Gas blast switch with a braking device Download PDF

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Publication number
EP0811998A1
EP0811998A1 EP96108917A EP96108917A EP0811998A1 EP 0811998 A1 EP0811998 A1 EP 0811998A1 EP 96108917 A EP96108917 A EP 96108917A EP 96108917 A EP96108917 A EP 96108917A EP 0811998 A1 EP0811998 A1 EP 0811998A1
Authority
EP
European Patent Office
Prior art keywords
switch
track
drive rod
force
braking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96108917A
Other languages
German (de)
French (fr)
Other versions
EP0811998B1 (en
Inventor
Jürg Burri
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.)
General Electric Switzerland GmbH
Original Assignee
GEC Alsthom T&D AG
Alstom AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GEC Alsthom T&D AG, Alstom AG filed Critical GEC Alsthom T&D AG
Priority to EP96108917A priority Critical patent/EP0811998B1/en
Priority to AT96108917T priority patent/ATE227047T1/en
Priority to DE59609837T priority patent/DE59609837D1/en
Priority to US08/867,881 priority patent/US5920051A/en
Publication of EP0811998A1 publication Critical patent/EP0811998A1/en
Application granted granted Critical
Publication of EP0811998B1 publication Critical patent/EP0811998B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
    • 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
    • H01H33/91—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 the arc-extinguishing fluid being air or gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H2003/3084—Kinetic energy of moving parts recuperated by transformation into potential energy in closing or opening spring to be used in next operation

Definitions

  • the invention relates to a gas pressure switch, in particular for high voltage, with a fixed contact element and a movable contact element interacting with it, a drive rod connecting the movable contact element with a drive, and a switch-off braking device for braking a switch-off movement of the drive rod, and a switch-off braking device for a gas pressure switch, especially for high voltage.
  • a gas pressure switch of this type is known from the older European patent application No. 95120347.0. It is a so-called blow piston switch, in which a blow piston is moved with a blow cylinder in the final phase of a switch-off process. While the gas remaining in the piston-cylinder system forms a gas cushion towards the end of a switch-off stroke in the case of pressure gas switches with a stationary blowing piston, which supports the braking of the moving masses, the remaining gas cannot contribute to braking the moving masses with blowing piston switches of the type mentioned. For this reason, a pneumatic switch-off brake arrangement is used in the gas pressure switch according to European patent application No. 95120347.0.
  • the switch-off brake arrangement contains a brake piston which is loosely arranged on the drive rod and which is carried along by a stop in the end section of the switch-off stroke.
  • These brakes have a low overall height and are therefore ideal for installation in the limited space available in the switching chamber suitable.
  • Their disadvantage is that they have to be manufactured with extremely tight tolerances and that the energy converted into heat when braking is no longer available for a subsequent switch-on process.
  • DE-A-41 16 314 discloses a brake based on friction.
  • This brake is also unsuitable for a gas pressure switch because friction causes abrasion, i.e. fine, possibly metallic powder that can impair the insulating ability of the insulating gas.
  • abrasion i.e. fine, possibly metallic powder that can impair the insulating ability of the insulating gas.
  • the braking energy is lost after switching off.
  • the present invention has for its object to provide a gas pressure switch, in particular for high voltage, with a switch-off braking device and a switch-off braking device, in which or with which the braking energy can be recovered at least in part for the switching-on process, and the switch-off braking device can be manufactured without adhering to narrow tolerances.
  • the switch-off braking device In the compressed gas switch according to the invention and by means of the switch-off braking device according to the invention, when the drive rod and the switch parts moving with it are braked, part of the kinetic energy is converted into potential energy by springs present in the switch-off braking device; this potential energy is used to additionally accelerate the drive rod and the switch parts moving with it during the switch-on process. It is particularly advantageous that the switch-off braking device according to the invention contains neither a medium to be monitored and refilled in addition to the insulating gas, nor parts that produce abrasion.
  • a compressed gas switch 1 has a switching chamber 3 delimited by a switching chamber insulator 2.
  • the switching chamber insulator 2 is connected to a connection flange 4, 5 at the top and bottom.
  • the upper connection flange 4 is connected to a fixed contact element 6, which has an erosion contact piece 7 and a continuous current contact piece 8.
  • a movable contact element 10 interacts with the fixed erosion contact piece 7.
  • the compressed gas switch 1 is designed as a blow piston switch; a blow cylinder provided with a blow nozzle 12 and also axially movable with the movable contact element 10 is shown only symbolically in FIG. 1 and designated by 13; it interacts with the continuous current contact piece 8 in the switch on position.
  • blow piston switch The structure and mode of operation of the blow piston switch is described in detail, for example, in the earlier European patent applications No. 94109470.8 and 95120347.0; express reference is made to these.
  • the axial movement of the movable contact element 10, the blow cylinder 13 and a blow piston 14 indicated by dashed lines from a switch-on position, in which the movable contact element 10 is in contact with the fixed contact element 6, into a switch-off position shown in FIG. 1 takes place via a drive rod 15, which extends through the lower connecting flange 5 and is articulated to an actuating rod 16 made of insulating material, which runs inside a post insulator arrangement 17.
  • the actuating rod 16 is connected to a drive 20 via a mechanism 19 (not shown in more detail) which is arranged in a housing 18.
  • an insulating gas preferably SF6, under a certain overpressure with respect to the environment.
  • a switch-off braking device 22 which is now described with reference to FIGS. 2 and 3, is arranged in the switching chamber 3 at the lower connecting flange 5.
  • FIG. 2 shows the lower end region of the switching chamber insulator 2, which is connected to the connecting flange 5 by means of a fastening flange 23.
  • the fastening flange 23 is screwed to the connecting flange 5, which is not shown in FIG. 2.
  • the connecting flange 5 is also screwed to a further fastening flange 24, via which the fastening to the post insulator 25 of the post insulator arrangement 17 takes place.
  • the switching chamber insulator 2 is firmly connected to the fastening flange 23 and the support insulator 25 to the further fastening flange 24 by means of cementing.
  • the inside of the support insulator arrangement 17 and also the switching chamber 3 are sealed to the outside in the region of the connecting flange 5 by means of seals 26, 27.
  • the connecting flange 5 has a sleeve-shaped part 30 which projects upwards into the interior of the switching chamber 3 and is provided with a transverse wall 31 and with its upper end region, not shown, serves to support or support the blow piston 14.
  • the transverse wall 31 is omitted for clarity.
  • the transverse wall 31 is designed in such a way that the axially movable drive rod 15 can reach through unhindered.
  • guide rods 35, 36, 37, 38 are fastened in the transverse wall 31 on the one hand and in a lower, inner shoulder 32 of the connecting flange 5.
  • Two guide rods 35, 36 and 37, 38 are arranged symmetrically to an axial plane A (FIG. 3), in which the switch axis y extending in the vertical direction also lies, the axes of the respective guide rods 35, 36, 37, 38 being one Include an acute angle a with the axial plane A, as shown in Fig. 2.
  • the pairs of guide rods 35, 36 and 37, 38 each lie in a plane B, B 'parallel to the switch axis y, which are arranged at the same distance b from the pressure switch axis y.
  • a roller bearing 41, 42 is arranged displaceably on the guide rods 35, 37 and 36, 38 lying to one side of the axial plane A.
  • Each roller bearing 41, 42 carries a freely rotatably mounted roller 43 and 44 centrally between the guide rods 35, 37 and 36, 38, respectively, the rollers 43, 44 being intended to cooperate with the centrally arranged drive rod 15, as described in more detail below is described.
  • Each guide rod 35, 36, 37 and 38 is coaxially assigned a spring 47 which is supported on the one hand on the corresponding roller bearing 41 or 42 and on the other hand on the shoulder 32 of the connecting flange 5.
  • the springs 47 are preferred designed as one or more concentrically arranged spiral springs or as disc spring assemblies.
  • the drive rod 15 is configured in the form of a link in its lower region, which extends through the switch-off brake device 22, and has raceways arranged symmetrically to the axial plane A, each of which has an upper contact-side race section 49 parallel to the switch axis y, a lower drive-side race section likewise parallel to the switch axis y 48 and an intermediate, inclined connecting section 50.
  • the two upper track sections 49 are at a greater distance from the switch axis y than the lower track sections 48.
  • the drive rod 15 In the switched-on position of the compressed gas switch 1, in which the movable contact element 10 interacts with the fixed contact element 6, the drive rod 15 is in its uppermost position.
  • the rollers 43 lie on the lower raceway sections 48 of the drive rod 15, corresponding to the right half of FIG.
  • the springs 47 are at least partially relaxed.
  • the actuating rod 16 accelerates the actuating rod 15 and with it the movable contact element 10 and the blowing cylinder 13 with the blowing nozzle 12 downwards.
  • the switch-off braking device 22 permits this movement, from the minimal rolling friction losses between the rollers 43, 44 and the raceway sections 48 apart from without braking action until the connecting portions 50 come into interaction with the rollers 43, 44. From this moment, a force is exerted on the rollers 43, 44 via the connecting sections 50 by the drive rod 15, a component of this force pushing the rollers 43, 44 apart on both sides while overcoming the force of the springs 47.
  • the braking and acceleration process of the drive rod 15 can be influenced in the desired manner by suitably shaping the connecting sections 50.
  • switch-off braking device is intended in particular for blow piston switches, use with conventional compressed gas switches with a fixed blow piston would also be entirely possible.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Braking Arrangements (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

The high-voltage gas-operated isolating switch has an in-line assembly with the gas stage coupled to a drive rod Ä5Ü. The rod passes through a bush shaped section Ä30Ü and within this are two pairs of guide bars that are set at angles, each of which have roller bearings Ä41,43Ü. The rollers move on the guide bars against spring elements Ä47Ü. The drive rod has a profiled track surface Ä49Ü that operates against the rollers and the springs provide a retarding (braking) action.

Description

Die Erfindung betrifft einen Druckgasschalter, insbesondere für Hochspannung, mit einem feststehenden Kontaktelement und einem mit diesem zusammenwirkenden beweglichen Kontaktelement, einer das bewegliche Kontaktelement mit einem Antrieb verbindenden Antriebsstange, und einer Ausschalt-Bremsvorrichtung zum Bremsen einer Ausschaltbewegung der Antriebsstange, sowie eine Ausschalt-Bremsvorrichtung für einen Druckgasschalter, insbesondere für Hochspannung.The invention relates to a gas pressure switch, in particular for high voltage, with a fixed contact element and a movable contact element interacting with it, a drive rod connecting the movable contact element with a drive, and a switch-off braking device for braking a switch-off movement of the drive rod, and a switch-off braking device for a gas pressure switch, especially for high voltage.

Ein Druckgasschalter dieser Art ist aus der älteren europäischen Patentanmeldung Nr. 95120347.0 bekannt. Es handelt sich dabei um einen sogenannten Blaskolbenschalter, bei dem in der Schlussphase eines Ausschaltvorganges ein Blaskolben mit einem Blaszylinder mitbewegt wird. Während bei Druckgasschaltern mit stillstehendem Blaskolben gegen das Ende eines Ausschlalthubes das sich im Kolben-Zylinder-System befindende Restgas ein Gaskissen bildet, das die Abbremsung der bewegten Massen unterstützt, kann bei Blaskolbenschaltern der genannten Art das Restgas nicht zum Abbremsen der bewegten Massen beitragen. Deswegen wird bei dem Druckgasschalter gemäss der europäischen Patentanmeldung Nr. 95120347.0 eine pneumatische Ausschalt-Bremsanordnung eingesetzt. Die Ausschalt-Bremsanordnung enthält einen lose auf der Antriebsstange angeordneten Bremskolben, der im Endabschnitt des Ausschalthubes durch einen Anschlag mitgenommen wird. Diese Bremsen haben eine geringe Bauhöhe und sind deshalb für den Einbau in den knappen zur Verfügung stehenden Raum in der Schaltkammer bestens geeignet. Ihr Nachteil besteht darin, dass sie mit äusserst engen Toleranzen gefertigt werden müssen, und dass die beim Bremsen in Wärme umgesetzte Energie nicht mehr für einen nachfolgenden Einschaltvorgang zur Verfügung steht.A gas pressure switch of this type is known from the older European patent application No. 95120347.0. It is a so-called blow piston switch, in which a blow piston is moved with a blow cylinder in the final phase of a switch-off process. While the gas remaining in the piston-cylinder system forms a gas cushion towards the end of a switch-off stroke in the case of pressure gas switches with a stationary blowing piston, which supports the braking of the moving masses, the remaining gas cannot contribute to braking the moving masses with blowing piston switches of the type mentioned. For this reason, a pneumatic switch-off brake arrangement is used in the gas pressure switch according to European patent application No. 95120347.0. The switch-off brake arrangement contains a brake piston which is loosely arranged on the drive rod and which is carried along by a stop in the end section of the switch-off stroke. These brakes have a low overall height and are therefore ideal for installation in the limited space available in the switching chamber suitable. Their disadvantage is that they have to be manufactured with extremely tight tolerances and that the energy converted into heat when braking is no longer available for a subsequent switch-on process.

Aus DE-C-32 15 243 ist die Verwendung einer hydraulischen Bremse für einen Druckgasschalter bekannt. Wegen der hohen Zähigkeit des Strömungsmediems sind die Anforderungen an die Toleranzen bei der Fertigung einer hydraulischen Bremse geringer als bei einer pneumatischen Bremse. Diese Lösung ist jedoch mit dem Nachteil verbunden, dass neben Isoliergas ein weiteres Medium, nämlich die Hydraulikflüssigkeit, überwacht werden muss, und dies an einem schwer zugänglichen Ort. Auch bei einer hydraulischen Bremse ist die Bremsenergie nach einer Ausschaltung verloren.From DE-C-32 15 243 the use of a hydraulic brake for a gas pressure switch is known. Due to the high viscosity of the flow medium, the requirements for the tolerances when manufacturing a hydraulic brake are lower than with a pneumatic brake. However, this solution has the disadvantage that in addition to insulating gas, another medium, namely the hydraulic fluid, has to be monitored, and this in a location that is difficult to access. With a hydraulic brake, too, the braking energy is lost after switching off.

Aus DE-A-41 16 314 ist schliesslich eine Bremse auf der Basis von Reibung bekannt. Auch diese Bremse ist für einen Druckgasschalter ungeeignet, weil Reibung einen Abrieb zur Folge hat, d.h. feines, gegebenenfalls metallisches Pulver, das die Isolationsfähigkeit des Isoliergases beeinträchtigen kann. Weiter ist wie bei pneumatischen und hydraulischen Bremsen die Bremsenergie nach einer Ausschaltung verloren.Finally, DE-A-41 16 314 discloses a brake based on friction. This brake is also unsuitable for a gas pressure switch because friction causes abrasion, i.e. fine, possibly metallic powder that can impair the insulating ability of the insulating gas. Furthermore, as with pneumatic and hydraulic brakes, the braking energy is lost after switching off.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Druckgasschalter, insbesondere für Hochspannung, mit einer Ausschalt-Bremsvorrichtung sowie eine AusschaltBremsvorrichtung zu schaffen, bei dem bzw. mit der die Bremsenergie wenigstens zum Teil für den Einschaltvorgang zurückgewonnen werden kann, und die Ausschalt-Bremsvorrichtung ohne Einhaltung enger Toleranzen gefertigt werden kann.The present invention has for its object to provide a gas pressure switch, in particular for high voltage, with a switch-off braking device and a switch-off braking device, in which or with which the braking energy can be recovered at least in part for the switching-on process, and the switch-off braking device can be manufactured without adhering to narrow tolerances.

Diese Aufgabe wird erfindungsgemäss durch die im Anspruch 1 angegebenen Merkmale gelöst.This object is achieved according to the invention by the features specified in claim 1.

Beim erfindungsgemässen Druckgasschalter und mittels der erfindungsgemässen Ausschalt-Bremsvorrichtung wird beim Abbremsen der Antriebsstange und der mit ihr bewegten Schalterteile ein Teil der kinetischen Energie in potentielle Energie von in der Ausschalt-Bremsvorrichtung vorhandenen Federn umgewandelt; diese potentielle Energie wird zur zusätzlichen Beschleunigung der Antriebsstange und der mit ihr bewegten Schalterteile beim Einschaltvorgang ausgenützt. Es ist dabei von besonderem Vorteil, dass die erfindungsgemässe Ausschalt-Bremsvorrichtung weder ein zusätzlich zum Isoliergas zu überwachendes und nachzufüllendes Medium noch Abrieb erzeugende Teile enthält.In the compressed gas switch according to the invention and by means of the switch-off braking device according to the invention, when the drive rod and the switch parts moving with it are braked, part of the kinetic energy is converted into potential energy by springs present in the switch-off braking device; this potential energy is used to additionally accelerate the drive rod and the switch parts moving with it during the switch-on process. It is particularly advantageous that the switch-off braking device according to the invention contains neither a medium to be monitored and refilled in addition to the insulating gas, nor parts that produce abrasion.

Bevorzugte Ausgestaltungen des erfindungsgemässen Druckgasschalters sind in den abhängigen Ansprüchen definiert.Preferred configurations of the compressed gas switch according to the invention are defined in the dependent claims.

Ein Ausführungsbeispiel des erfindungsgemässen Druckgasschalters ist in der Zeichnung dargestellt und im folgenden näher beschrieben.An embodiment of the compressed gas switch according to the invention is shown in the drawing and described in more detail below.

Es zeigen:

Fig. 1
schematisch einen Druckgasschalter in Ansicht und teilweise im Schnitt, mit einer integrierten Ausschalt-Bremsvorrichtung;
Fig. 2
gegenüber Fig. 1 vergrössert einen Teil des Druckgasschalters mit der Ausschalt-Bremsvorrichtung im Längsschnitt, wobei die linke Hälfte der Ausschaltstellung des Druckgasschalters und die rechte Hälfte der Einschaltstellung entspricht; und
Fig. 3
einen Teil der Ausschalt-Bremsvorrichtung nach Fig. 2 in Draufsicht und teilweise im Schnitt in der Einschaltstellung.
Show it:
Fig. 1
schematically a pressure gas switch in view and partially in section, with an integrated switch-off braking device;
Fig. 2
compared to Fig. 1 enlarges part of the gas switch with the switch-off braking device in longitudinal section, the left half corresponds to the switch-off position of the pressure gas switch and the right half to the switch-on position; and
Fig. 3
part of the switch-off braking device according to FIG. 2 in plan view and partly in section in the switched-on position.

Gemäss Fig. 1 weist ein Druckgasschalter 1 eine von einem Schaltkammerisolator 2 begrenzte Schaltkammer 3 auf. Oben und unten ist der Schaltkammerisolator 2 mit je einem Anschlussflansch 4, 5 verbunden. Der obere Anschlussflansch 4 steht mit einem feststehenden Kontaktelement 6 in Verbindung, das ein Abbrandkontaktstück 7 sowie ein Dauerstromkontaktstück 8 aufweist. Mit dem feststehenden Abbrandkontaktstück 7 wirkt ein bewegliches Kontaktelement 10 zusammen. Der Druckgasschalter 1 ist als Blaskolbenschalter ausgebildet; ein mit einer Blasdüse 12 versehener, mit dem beweglichen Kontaktelement 10 ebenfalls axial bewegbarer Blaszylinder ist in Fig. 1 nur symbolisch dargestellt und mit 13 bezeichnet; er wirkt in Einschaltstellung des Schalters mit dem Dauerstromkontaktstück 8 zusammen. Der Aufbau und die Funktionsweise des Blaskolbenschalters ist beispielsweise in den älteren europäischen Patentanmeldungen Nr. 94109470.8 und 95120347.0 ausführlich beschrieben; es wird ausdrücklich auf diese verwiesen. Die Axialbewegung des beweglichen Kontaktelements 10, des Blaszylinders 13 und eines gestrichelt angedeuteten Blaskolbens 14 aus einer Einschaltstellung, in der sich das bewegliche Kontaktelement 10 im Kontakt mit dem feststehenden Kontaktelement 6 befindet, in eine in Fig. 1 dargestellte Ausschaltstellung erfolgt über eine Antriebsstange 15, die den unteren Anschlussflansch 5 durchgreift und an eine Betätigungsstange 16 aus Isoliermaterial angelenkt ist, die im Innern einer Stützisolatoranordnung 17 verläuft. Die Betätigungsstange 16 ist über einen nicht näher dargestellten, in einem Gehäuse 18 angeordneten Mechanismus 19 mit einem Antrieb 20 verbunden.1, a compressed gas switch 1 has a switching chamber 3 delimited by a switching chamber insulator 2. The switching chamber insulator 2 is connected to a connection flange 4, 5 at the top and bottom. The upper connection flange 4 is connected to a fixed contact element 6, which has an erosion contact piece 7 and a continuous current contact piece 8. A movable contact element 10 interacts with the fixed erosion contact piece 7. The compressed gas switch 1 is designed as a blow piston switch; a blow cylinder provided with a blow nozzle 12 and also axially movable with the movable contact element 10 is shown only symbolically in FIG. 1 and designated by 13; it interacts with the continuous current contact piece 8 in the switch on position. The structure and mode of operation of the blow piston switch is described in detail, for example, in the earlier European patent applications No. 94109470.8 and 95120347.0; express reference is made to these. The axial movement of the movable contact element 10, the blow cylinder 13 and a blow piston 14 indicated by dashed lines from a switch-on position, in which the movable contact element 10 is in contact with the fixed contact element 6, into a switch-off position shown in FIG. 1 takes place via a drive rod 15, which extends through the lower connecting flange 5 and is articulated to an actuating rod 16 made of insulating material, which runs inside a post insulator arrangement 17. The actuating rod 16 is connected to a drive 20 via a mechanism 19 (not shown in more detail) which is arranged in a housing 18.

Im Innern der Schaltkammer 3 und der Stützisolatoranordnung 17 befindet sich ein Isoliergas, vorzugsweise SF6, unter einem bestimmten Überdruck gegenüber der Umgebung.Inside the switching chamber 3 and the support insulator arrangement 17 there is an insulating gas, preferably SF6, under a certain overpressure with respect to the environment.

In der Schaltkammer 3 ist beim unteren Anschlussflansch 5 eine Ausschalt-Bremsvorrichtung 22 angeordnet, die nun anhand der Fig. 2 und 3 beschrieben wird.A switch-off braking device 22, which is now described with reference to FIGS. 2 and 3, is arranged in the switching chamber 3 at the lower connecting flange 5.

Fig. 2 zeigt den unteren Endbereich des Schaltkammerisolators 2, der mittels eines Befestigungsflansches 23 mit dem Anschlussflansch 5 verbunden ist. Der Befestigungsflansch 23 ist mit dem Anschlussflansch 5 verschraubt, was in Fig.2 nicht näher dargestellt ist. Der Anschlussflansch 5 ist ferner mit einem weiteren Befestigungsflansch 24 verschraubt, über welchen die Befestigung am Stützisolator 25 der Stützisolatoranordnung 17 erfolgt. Der Schaltkammerisolator 2 ist mit dem Befestigungsflansch 23 und der Stützisolator 25 mit dem weiteren Befestigungsflansch 24 mittels einer Verkittung fest verbunden. Das Innere der Stützisolatoranordnung 17 sowie auch die Schaltkammer 3 sind im Bereich des Anschlussflansches 5 über Dichtungen 26, 27 nach aussen abgedichtet.2 shows the lower end region of the switching chamber insulator 2, which is connected to the connecting flange 5 by means of a fastening flange 23. The fastening flange 23 is screwed to the connecting flange 5, which is not shown in FIG. 2. The connecting flange 5 is also screwed to a further fastening flange 24, via which the fastening to the post insulator 25 of the post insulator arrangement 17 takes place. The switching chamber insulator 2 is firmly connected to the fastening flange 23 and the support insulator 25 to the further fastening flange 24 by means of cementing. The inside of the support insulator arrangement 17 and also the switching chamber 3 are sealed to the outside in the region of the connecting flange 5 by means of seals 26, 27.

Der Anschlussflansch 5 weist gemäss Fig. 2 einen nach oben ins Innere der Schaltkammer 3 hineinragenden, hülsenförmigen Teil 30 auf, der mit einer Querwand 31 versehen ist und mit seinem nicht gezeigten, oberen Endbereich zum Stützen bzw. zur Lagerung des Blaskolbens 14 dient. In Fig. 3 ist die Querwand 31 der besseren Übersichtlichkeit wegen weggelassen. Die Querwand 31 ist so ausgestaltet, dass die axialbewegliche Antriebsstange 15 ungehindert durchgreifen kann.According to FIG. 2, the connecting flange 5 has a sleeve-shaped part 30 which projects upwards into the interior of the switching chamber 3 and is provided with a transverse wall 31 and with its upper end region, not shown, serves to support or support the blow piston 14. In Fig. 3, the transverse wall 31 is omitted for clarity. The transverse wall 31 is designed in such a way that the axially movable drive rod 15 can reach through unhindered.

In der Querwand 31 einerseits und in einem unteren, inneren Absatz 32 des Anschlussflansches 5 sind vier Führungsstangen 35, 36, 37, 38 befestigt. Dabei sind je zwei Führungsstangen 35, 36 und 37, 38 symetrisch zu einer Axialebene A (Fig. 3) angeordnet, in welcher auch die in vertikaler Richtung verlaufende Schalterachse y liegt, wobei die Achsen der jeweiligen Führungsstange 35, 36, 37, 38 einen spitzen Winkel a mit der Axialebene A einschliessen, wie aus Fig. 2 ersichtlich. Die Führungsstangenpaare 35, 36 und 37, 38 liegen in je einer zur Schalterachse y parallelen Ebene B, B', die im gleichen Abstand b von der Druckschalterachse y angeordnet sind.Four guide rods 35, 36, 37, 38 are fastened in the transverse wall 31 on the one hand and in a lower, inner shoulder 32 of the connecting flange 5. Two guide rods 35, 36 and 37, 38 are arranged symmetrically to an axial plane A (FIG. 3), in which the switch axis y extending in the vertical direction also lies, the axes of the respective guide rods 35, 36, 37, 38 being one Include an acute angle a with the axial plane A, as shown in Fig. 2. The pairs of guide rods 35, 36 and 37, 38 each lie in a plane B, B 'parallel to the switch axis y, which are arranged at the same distance b from the pressure switch axis y.

Auf den jeweils zu einer Seite der Axialebene A liegenden Führungsstangen 35, 37 bzw. 36, 38 ist ein Rollenlager 41, 42 verschiebbar angeordnet. Jedes Rollenlager 41, 42 trägt mittig zwischen den Führungsstangen 35, 37 bzw. 36, 38 eine frei drehbar gelagerte Rolle 43 bzw. 44, wobei die Rollen 43, 44 dazu bestimmt sind, mit der zentral angeordneten Antriebsstange 15 zusammenzuwirken, wie weiter unten näher beschrieben wird.A roller bearing 41, 42 is arranged displaceably on the guide rods 35, 37 and 36, 38 lying to one side of the axial plane A. Each roller bearing 41, 42 carries a freely rotatably mounted roller 43 and 44 centrally between the guide rods 35, 37 and 36, 38, respectively, the rollers 43, 44 being intended to cooperate with the centrally arranged drive rod 15, as described in more detail below is described.

Jeder Führungsstange 35, 36, 37, und 38 ist koaxial eine Feder 47 zugeordnet, die einerseits am entsprechenden Rollenlager 41 bzw. 42 und anderseits am Absatz 32 des Anschlussflansches 5 abgestützt ist. Die Federn 47 sind vorzugsweise als eine oder mehrere konzentrisch angeordnete Spiralfeder oder als Tellerfederpakete ausgebildet.Each guide rod 35, 36, 37 and 38 is coaxially assigned a spring 47 which is supported on the one hand on the corresponding roller bearing 41 or 42 and on the other hand on the shoulder 32 of the connecting flange 5. The springs 47 are preferred designed as one or more concentrically arranged spiral springs or as disc spring assemblies.

Die Antriebsstange 15 ist in ihrem unteren, die AusschaltBremsvorrichtung 22 durchgreifenden Bereich kulissenartig ausgebildet und weist symmetrisch zur Axialebene A angeordnete Laufbahnen auf, die jeweils einen oberen, zur Schalterachse y parallelen, kontaktseitigen Laufbahnabschnitt 49, einen unteren, ebenfalls zur Schalterachse y parallelen, antriebseitigen Laufbahnabschnitt 48 und einen dazwischenliegenden, schräg verlaufenden Verbindungsabschnitt 50 umfassen. Die beiden oberen Laufbahnabschnitte 49 liegen in einem grösseren Abstand von der Schalterachse y, als die unteren Laufbahnabschnitte 48.The drive rod 15 is configured in the form of a link in its lower region, which extends through the switch-off brake device 22, and has raceways arranged symmetrically to the axial plane A, each of which has an upper contact-side race section 49 parallel to the switch axis y, a lower drive-side race section likewise parallel to the switch axis y 48 and an intermediate, inclined connecting section 50. The two upper track sections 49 are at a greater distance from the switch axis y than the lower track sections 48.

Aus dem beschriebenen Aufbau ergibt sich folgende Funktionsweise:The following functionality results from the described structure:

In der Einschaltstellung des Druckgasschalters 1, in welcher das bewegliche Kontaktelement 10 mit dem feststehenden Kontaktelement 6 zusammenwirkt, befindet sich die Antriebsstange 15 in ihrer obersten Stellung. Dabei liegen die Rollen 43 - der rechten Hälfte der Fig.2 entsprechend - an den unteren Laufbahnabschnitten 48 der Antriebsstange 15 an. Die Federn 47 sind wenigstens teilweise entspannt.In the switched-on position of the compressed gas switch 1, in which the movable contact element 10 interacts with the fixed contact element 6, the drive rod 15 is in its uppermost position. The rollers 43 lie on the lower raceway sections 48 of the drive rod 15, corresponding to the right half of FIG. The springs 47 are at least partially relaxed.

Wird nun vom Antrieb 20 der Ausschaltvorgang eingeleitet, so wird über die Betätigungsstange 16 die Antriebsstange 15 und mit dieser das bewegliche Kontaktelement 10 sowie der Blaszylinder 13 mit der Blasdüse 12 nach unten beschleunigt. Die Ausschalt- Bremsvorrichtung 22 erlaubt diese Bewegung, von den minimalen Rollreibungsverlusten zwischen den Rollen 43, 44 und den Laufbahnabschnitten 48 abgesehen, ohne Bremswirkung, bis die Verbindungsabschnitte 50 mit den Rollen 43, 44 in Zusammenwirkung kommen. Von diesem Augenblick an wird über die Verbindungsabschnitte 50 von der Antriebsstange 15 eine Kraft auf die Rollen 43, 44 ausgeübt, wobei beidseitig eine Komponente dieser Kraft die Rollen 43, 44 unter Überwindung der Kraft der Federn 47 auseinanderdrückt. Ein Teil der kinetischen Energie der bewegten Masse wird in potentielle Energie der Federn 47 umgewandelt, die Antriebsstange 15 und die mit ihr bewegten Schalterteile werden somit zum gewünschten Zeitpunkt abgebremst. Sobald die oberen, zur Antriebsstange 15 parallelen Laufbahnabschnitte 49 mit den Rollen 43, 44 zusammenwirken, ist der Bremsvorgang abgeschlossen, und die Federn 47 üben wiederum nur eine minimale, der Rollreibung zwischen den Rollen 43, 44 und den Laufbahnabschnitten 49 entsprechende Kraft auf die Antriebsstange 15 aus. Die potentielle Energie der Federn 47 bleibt jedoch erhalten, da die durch die Laufbahnabschnitte 49 auseinander gedrückten Rollen 43, 44 die Entspannung der Federn 47 verunmöglichen.If the drive 20 now initiates the switch-off process, the actuating rod 16 accelerates the actuating rod 15 and with it the movable contact element 10 and the blowing cylinder 13 with the blowing nozzle 12 downwards. The switch-off braking device 22 permits this movement, from the minimal rolling friction losses between the rollers 43, 44 and the raceway sections 48 apart from without braking action until the connecting portions 50 come into interaction with the rollers 43, 44. From this moment, a force is exerted on the rollers 43, 44 via the connecting sections 50 by the drive rod 15, a component of this force pushing the rollers 43, 44 apart on both sides while overcoming the force of the springs 47. Part of the kinetic energy of the moving mass is converted into potential energy of the springs 47, the drive rod 15 and the switch parts moved with it are thus braked at the desired time. As soon as the upper raceway sections 49, which are parallel to the drive rod 15, cooperate with the rollers 43, 44, the braking process is completed, and the springs 47 in turn exert only a minimal force on the drive rod, corresponding to the rolling friction between the rollers 43, 44 and the raceway sections 49 15 out. The potential energy of the springs 47 is retained, however, since the rollers 43, 44 pressed apart by the raceway sections 49 make it impossible for the springs 47 to relax.

Wird nun vom Antrieb 20 der Einschaltvorgang eingeleitet und die Antriebsstange 15 nach oben bewegt, so wird in dem Augenblick, in welchem die Verbindungsabschnitte 50 die Rollen 43, 44 erreichen und von diesen untergriffen werden die potentielle Energie der Federn 47 freigegeben, und die sich nun entspannenden Federn 47 beschleunigen mit ihrer Kraft bzw. der vertikalen Komponente derselben die Einschaltbewegung der Antriebsstange 15, bis wiederum die unteren Laufbahnabschnitte 48 mit den Rollen 43, 44 zusammenwirken.If the drive 20 now initiates the switch-on process and the drive rod 15 moves upwards, the moment in which the connecting sections 50 reach the rollers 43, 44 and are engaged by them, the potential energy of the springs 47 is released, and this is now Relaxing springs 47 accelerate the switch-on movement of the drive rod 15 with their force or the vertical component thereof, until in turn the lower raceway sections 48 interact with the rollers 43, 44.

Durch die Wahl eines spitzen Winkels a für die Schrägstellung der Führungsstangen 35, 36, 37 und 38 ergibt sich eine für den Einbau im Druckschalter 1 günstige, kompakte Form der Auschalt-Bremsvorrichtung 22. Zudem erhalten die Federn 47 einen möglichst langen Wirkhub.The choice of an acute angle a for the inclined position of the guide rods 35, 36, 37 and 38 results in a compact form of the switch-off braking device 22 which is favorable for installation in the pressure switch 1. In addition, the springs 47 have an effective stroke as long as possible.

Durch geeignetes Formen der Verbindungsabschnitte 50 kann der Brems- und Beschleunigungsvorgang der Antriebsstange 15 in gewünschter Weise beeinflusst werden.The braking and acceleration process of the drive rod 15 can be influenced in the desired manner by suitably shaping the connecting sections 50.

Obwohl die erfindungsgemässe Ausschalt-Bremsvorrichtung insbesondere für Blaskolbenschalter vorgesehen ist, wäre eine Anwendung bei konventionellen Druckgasschaltern mit feststehendem Blaskolben ebenfalls durchaus möglich.Although the switch-off braking device according to the invention is intended in particular for blow piston switches, use with conventional compressed gas switches with a fixed blow piston would also be entirely possible.

Claims (6)

Druckgasschalter, insbesondere für Hochspannung, mit einem feststehenden Kontaktelement (6) und einem mit diesem zusammenwirkenden beweglichen Kontaktelement (10), einer das bewegliche Kontaktelement (10) mit einem Antrieb (20) verbindenden Antriebsstange (15), einer Ausschalt-Bremsvorrichtung (22) zum Bremsen einer Ausschaltbewegung der Antriebsstange (15), die eine der Antriebsstange (15) zugeordnete Laufbahn (48, 49, 50) sowie eine mit der Laufbahn (48, 49, 50) zusammenwirkende, entgegen der Kraft einer Feder (47) bewegbar geführte Rolle (43 bzw. 44) umfasst, wobei die Laufbahn (48, 49, 50) zwei parallel zur Schalterachse (y) und hintereinander angeordnete Laufbahnabschnitte (48, 49) aufweist, von denen der kontaktseitige Laufbahnabschnitt (49) in einem grösseren Abstand von der Schalterachse (y) liegt als der antriebseitige Laufbahnabschnitt (48), und die beiden Laufbahnabschnitte (48, 49) über einen Verbindungsabschnitt (50) miteinander verbunden sind, der bei der Ausschaltbewegung der Antriebsstange (15) die Rolle (43 bzw. 44) entgegen der Kraft der Feder (47) unter gleichzeitiger Ausübung einer Bremskraft auf die Antriebsstange (15) zurückdrängt.Compressed gas switch, in particular for high voltage, with a fixed contact element (6) and a movable contact element (10) interacting with it, a drive rod (15) connecting the movable contact element (10) with a drive (20), a switch-off braking device (22) for braking a switch-off movement of the drive rod (15), which guides a track (48, 49, 50) assigned to the drive rod (15) and a track which cooperates with the track (48, 49, 50) and is movable against the force of a spring (47) Roller (43 or 44), wherein the track (48, 49, 50) has two track sections (48, 49) arranged parallel to the switch axis (y) and one behind the other, of which the contact-side track section (49) at a greater distance of the switch axis (y) is located as the drive-side raceway section (48), and the two raceway sections (48, 49) are connected to one another via a connecting section (50) which, when switched off the drive rod (15) pushes the roller (43 or 44) against the force of the spring (47) while simultaneously exerting a braking force on the drive rod (15). Druckgasschalter nach Anspruch 1, dadurch gekennzeichnet, dass die Rolle (43 bzw. 44) an einer Führungsstange verschiebbar geführt ist, welche in einem spitzen Winkel (a) zu der Schalterachse (y) angeordnet ist.Compressed gas switch according to claim 1, characterized in that the roller (43 or 44) is slidably guided on a guide rod which is arranged at an acute angle (a) to the switch axis (y). Druckgasschalter nach Anspruch 2, dadurch gekennzeichnet, dass die Feder (47) von der Führungsstange geführt ist.Compressed gas switch according to claim 2, characterized in that the spring (47) is guided by the guide rod. Druckgasschalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass zwei Laufbahnen (48, 49, 50) symmetrisch zur Schalterachse (y) angeordnet sind.Compressed gas switch according to one of claims 1 to 3, characterized in that two raceways (48, 49, 50) are arranged symmetrically to the switch axis (y). Druckgasschalter nach Anspruch 4, dadurch gekennzeichnet, dass die den beiden Laufbahnen (48, 49, 50) zugeordneten Rollen (43, 44) an je einem Rollenlager (41, 42) drehbar gelagert sind, wobei jedes Rollenlager (41, 42) an zwei parallelen Führungsstangen (35, 37 bzw. 36, 38) entgegen der Kraft von zu den Führungsstangen koaxial angeordneten Federn (47) verstellbar angeordnet ist.Compressed gas switch according to claim 4, characterized in that the rollers (43, 44) assigned to the two raceways (48, 49, 50) are each rotatably mounted on one roller bearing (41, 42), each roller bearing (41, 42) on two parallel guide rods (35, 37 or 36, 38) is arranged adjustable against the force of springs (47) arranged coaxially with the guide rods. Ausschalt-Bremsvorrichtung für einen Druckgasschalter, insbesondere für Hochspannung, die eine einer Antriebsstange (15) des Druckgasschalters (1) zugeordnete Laufbahn (48, 49, 50) sowie eine mit der Laufbahn (48, 49, 50) zusammenwirkende, entgegen der Kraft einer Feder (47) verstellbar geführte Rolle (43 bzw. 44) umfasst, wobei die Laufbahn (48, 49, 50) zwei parallel zur Schalterachse (y) und hintereinander angeordnete Laufbahnabschnitte (48, 49) aufweist, von denen der kontaktseitige Laufbahnabschnitt (49) in einem grösseren Abstand von der Schalterachse (y) liegt als der antriebseitige Laufbahnabschnitt (48), und die beiden Laufbahnabschnitte (48, 49) über einen Verbindungsabschnitt (50) miteinander verbunden sind, der bei der Ausschaltbewegung der Antriebsstange (15) die Rolle (43 bzw. 44) entgegen der Kraft der Feder (47) unter gleichzeitiger Ausübung einer Bremskraft auf die Antriebsstange (15) zurückdrängt.Switch-off braking device for a pressure gas switch, in particular for high voltage, which has a track (48, 49, 50) associated with a drive rod (15) of the pressure gas switch (1) and a track which cooperates with the track (48, 49, 50) against the force of one Spring (47) includes an adjustable roller (43 or 44), the track (48, 49, 50) having two track sections (48, 49) arranged parallel to the switch axis (y) and one behind the other, of which the contact-side track section (49 ) is at a greater distance from the switch axis (y) than the drive-side track section (48), and the two track sections (48, 49) are connected to one another via a connecting section (50) which, when the drive rod (15) is switched off, plays the role (43 or 44) against the force of the spring (47) under simultaneously exerting a braking force on the drive rod (15).
EP96108917A 1996-06-04 1996-06-04 Gas blast switch with a braking device Expired - Lifetime EP0811998B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP96108917A EP0811998B1 (en) 1996-06-04 1996-06-04 Gas blast switch with a braking device
AT96108917T ATE227047T1 (en) 1996-06-04 1996-06-04 COMPRESSED GAS SWITCH WITH A TURN-OFF BRAKE DEVICE
DE59609837T DE59609837D1 (en) 1996-06-04 1996-06-04 Compressed gas switch with a switch-off braking device
US08/867,881 US5920051A (en) 1996-06-04 1997-06-03 Compressed-gas cutout having a disconnecting braking structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96108917A EP0811998B1 (en) 1996-06-04 1996-06-04 Gas blast switch with a braking device

Publications (2)

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EP0811998A1 true EP0811998A1 (en) 1997-12-10
EP0811998B1 EP0811998B1 (en) 2002-10-30

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EP96108917A Expired - Lifetime EP0811998B1 (en) 1996-06-04 1996-06-04 Gas blast switch with a braking device

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US (1) US5920051A (en)
EP (1) EP0811998B1 (en)
AT (1) ATE227047T1 (en)
DE (1) DE59609837D1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11069495B2 (en) * 2019-01-25 2021-07-20 Eaton Intelligent Power Limited Vacuum switching apparatus and drive mechanism therefor

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US2233605A (en) * 1937-12-23 1941-03-04 Westinghouse Electric & Mfg Co Circuit interrupter
DE1045511B (en) * 1957-06-25 1958-12-04 Licentia Gmbh Gas pressure switch
DE9201943U1 (en) * 1992-02-13 1992-06-11 Siemens AG, 8000 München Device for damping a switching movement of an electrical circuit breaker
DE4116314A1 (en) * 1991-05-15 1992-11-19 Siemens Ag Friction damper with conical plunger for power switch - has ring around symmetrically divided friction body forced outwards by pressure of tapered switch rod termination

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DE2733551A1 (en) * 1977-07-25 1979-02-08 Siemens Ag EXHAUST GAS SWITCH
CH675175A5 (en) * 1987-10-27 1990-08-31 Bbc Brown Boveri & Cie
DE9210943U1 (en) * 1992-08-17 1992-12-10 Häfner & Krullmann GmbH, 4817 Leopoldshöhe Box-like container
DE4427163A1 (en) * 1994-08-01 1996-02-08 Abb Management Ag Gas pressure switch

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Publication number Priority date Publication date Assignee Title
US2233605A (en) * 1937-12-23 1941-03-04 Westinghouse Electric & Mfg Co Circuit interrupter
DE1045511B (en) * 1957-06-25 1958-12-04 Licentia Gmbh Gas pressure switch
DE4116314A1 (en) * 1991-05-15 1992-11-19 Siemens Ag Friction damper with conical plunger for power switch - has ring around symmetrically divided friction body forced outwards by pressure of tapered switch rod termination
DE9201943U1 (en) * 1992-02-13 1992-06-11 Siemens AG, 8000 München Device for damping a switching movement of an electrical circuit breaker

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ATE227047T1 (en) 2002-11-15
EP0811998B1 (en) 2002-10-30
DE59609837D1 (en) 2002-12-05
US5920051A (en) 1999-07-06

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