EP0815573B1 - Vacuum interrupter - Google Patents

Vacuum interrupter Download PDF

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Publication number
EP0815573B1
EP0815573B1 EP96905738A EP96905738A EP0815573B1 EP 0815573 B1 EP0815573 B1 EP 0815573B1 EP 96905738 A EP96905738 A EP 96905738A EP 96905738 A EP96905738 A EP 96905738A EP 0815573 B1 EP0815573 B1 EP 0815573B1
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EP
European Patent Office
Prior art keywords
insulator
metal cap
soldered
vacuum interrupter
bellows
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP96905738A
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German (de)
French (fr)
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EP0815573A1 (en
Inventor
Wolfgang Schwarze
Jörg KUSSEROW
Klaus Oberndörfer
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Siemens AG
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Siemens AG
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Publication of EP0815573A1 publication Critical patent/EP0815573A1/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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H01H2033/66215—Details relating to the soldering or brazing of vacuum switch housings
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • H01H2033/66269—Details relating to the materials used for screens in vacuum switches
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • H01H2033/66276—Details relating to the mounting of screens in vacuum switches

Definitions

  • the invention is in the field of electrical switches and deals with the constructive design of a Vacuum interrupter that acts as a switching element in low-voltage contactors can be used.
  • a well-known vacuum interrupter for low-voltage contactors consists essentially of a two-pole contact arrangement and a vacuum-tight surrounding this contact arrangement Housing, the housing of a metal cap, a hollow cylindrical ceramic insulator and a bellows becomes.
  • the metal cap with the power supply bolt of the fixed contact piece and on the front with the insulator and the bellows on the one hand on the front with the isolator and on the other hand with a Ring flange on the power supply pin of the movable contact soldered.
  • a tubular umbrella is provided which provided at one end with an edge widened into a cap is. This edge is soldered to a neck ring that in turn with the one facing the two contact pieces End face of the ceramic insulator is soldered.
  • this vacuum interrupter are several soldering processes required (DE 33 43 918 A1 / US 4 614 850).
  • the invention has for its object an effective shielding to make the isolator and a simple manufacture the vacuum interrupter, if possible in a single soldering process, to ensure.
  • the invention provides that the insulator is associated with a tubular screen provided with a flange-like edge at one end and is distributed in the circumferential direction by means of the edge arranged spacer knobs on the contacts facing End face of the insulator rests, and that the metal cap their edge soldered to the insulator in the circumferential direction structuring in the form of corrugation or toothing provided with a shaft or tooth height of 0.2 to 0.6 mm is, the metal cap is made of copper and for the purpose the soldering is coated with silver.
  • the Metal cap, the ceramic insulator and the screen together be soldered in the same operation, this soldering is carried out as seal soldering.
  • the structuring of the The edge of the metal cap forms slot-like openings, via which the vacuum interrupter degasses before the soldering process can be.
  • the soldering temperature is reached from the silver layer of the metal cap and from the material the metal cap enough solder with which the slot-like The openings must be closed in a vacuum-tight manner.
  • the other soldering processes for vacuum-tight connection of the Bellows on the one hand with the insulator and on the other hand with the movable power supply pin and for connecting the Metal cap with the fixed power supply bolt can be carried out simultaneously with the closure soldering, if the bellows over tubular lugs both on the insulator as well as on the ring flange of the movable power supply bolt butt and the fixed power supply pin by means of a ring flange on the outside of the metal cap is present.
  • a conical design of the movable power supply bolt in the area of the bellows enables the for soldering the bellows to the ring flange of the Movable power supply bolt required solder ring at Insert the different parts of the vacuum interrupter in center the solder shape of the solder joint.
  • the bellows are soldered to the ceramic insulator expediently used an annular solder foil, while for Solder the metal cap to the fixed power supply bolt the silver coating of the metal cap serves.
  • the vacuum interrupter according to Figure 1 has two contact pieces 1 and 2, one of which is at the end of a fixed one Power supply pin 3 and the other at the end of a movable Power supply pin 4 is arranged.
  • the contact arrangement is surrounded by a housing that consists of the metal cap 9, the hollow cylindrical ceramic insulator 12 and the Bellows 13 is made.
  • the metal cap 9 encloses the Contact area of the two contact pieces 1 and 2, and the Ceramic insulator 12 and the bellows 13 surround the power supply bolt 4 of the movable contact piece 2.
  • the fixed Power supply bolt 3 is with an annular flange 7 provided and is on the outside of the metal cap 9, wherein the centered assignment by means of a centering shoulder 8 is guaranteed.
  • the metal cap 9 is made of copper and is with an electroplated silver layer 18 Mistake.
  • the metal cap 9 sits bluntly with its edge on one End face of the hollow cylindrical ceramic insulator 12 on the other end face of a tubular extension 14 of the Bellows 13 is present.
  • the bellows 13 sits on the other End with a tubular extension 15 on one Ring flange 6 of the movable power supply pin 4.
  • the power supply bolt 4 is on a longitudinal section 5, which is surrounded by the bellows 13, conical.
  • soldering of all parts of the Vacuum switching tube can be done in a single operation.
  • the metal cap 9 at its edge according to Figures 2 and 3 provided with a structure that the shape according to Figure 2 a corrugation 10 or, according to FIG. 3, the shape of a toothing 11 can have, the wave height or the tooth height expedient is about 0.3 mm.
  • a tubular shield 16 is provided on its one end has a flange-like edge 17. With this Edge 17 is the shield on the same face of the Ceramic insulator 12 on which the metal cap 9 is also seated. To ensure free access to those through structuring of the cap edge created degassing slots most guaranteed, is the flange-like edge 17 of the shield 16 provided with indentations in the form of spacer knobs 20, the shield 16 against the end face of the ceramic insulator 12 by about 0.5 to 1 mm. - For centering the shield 16 within the ceramic insulator 12 can flange-like tube immediately after the flange-like Edge 17 on a longitudinal section 21 with a length of about 3 mm have an enlarged diameter.
  • the shield 16 is also involved in this soldering process included, with both soldering to the metal cap 9 and also with the end face of the ceramic insulator 12 results.

Abstract

In order to be able to solder all the housing parts of a vacuum interrupter for low-voltage contactors, including the tubular screening, in a single operation, the invention calls for the metal cap (9) which surrounds the two contacts (1, 2) and is made of silver-plated copper to have a shaped pattern (10, 11) running round the rim (19) which is to be soldered to one end of the hollow cylindrical insulator (12). The tubular screening (16) has a flange-like rim (17) running round its circumference with, disposed at intervals round the rim, spacer knobs (20) by means of which the screening rests on the same end of the insulator (12).

Description

Die Erfindung liegt auf dem Gebiet der elektrischen Schalter und befaßt sich mit der konstruktiven Ausgestaltung einer Vakuumschaltröhre, die als Schaltelement in Niederspannungsschützen verwendet werden kann.The invention is in the field of electrical switches and deals with the constructive design of a Vacuum interrupter that acts as a switching element in low-voltage contactors can be used.

Eine bekannte Vakuumschaltröhre für Niederspannungsschütze besteht im wesentlichen aus einer zweipoligen Kontaktanordnung und einem diese Kontaktanordnung vakuumdicht umgebenden Gehäuse, wobei das Gehäuse von einer Metallkappe, einem hohlzylindrischen Keramikisolator und einem Faltenbalg gebildet wird. Dabei ist zum einen die Metallkappe mit dem Stromzuführungsbolzen des feststehenden Kontaktstückes und stirnseitig mit dem Isolator und zum anderen der Faltenbalg einerseits stirnseitig mit dem Isolator und andererseits mit einem Ringflansch am Stromzuführungsbolzen des bewegbaren Kontaktes verlötet. Um bei dieser bekannten Vakuumschaltröhre die innere Oberfläche des Keramikisolators gegen den Niederschlag von Metalldampf zu schützen und damit die innere Isolationsfestigkeit der Vakuumschaltröhre zu gewährleisten und um zugleich den Faltenbalg gegen den Niederschlag von Metalldampf zu schützen, ist der Innendurchmesser des Keramikisolators, der den Stromzuführungsbolzen des feststehenden Kontaktes umgibt, so klein wie möglich ausgeführt. Durch diese Maßnahme läßt sich jedoch eine Ablagerung von Metalldampf auf der Innenoberfläche des Keramikisolators nicht vollständig vermeiden (DE-A1- 37 09 585/US-A-4 672 156).A well-known vacuum interrupter for low-voltage contactors consists essentially of a two-pole contact arrangement and a vacuum-tight surrounding this contact arrangement Housing, the housing of a metal cap, a hollow cylindrical ceramic insulator and a bellows becomes. On the one hand, there is the metal cap with the power supply bolt of the fixed contact piece and on the front with the insulator and the bellows on the one hand on the front with the isolator and on the other hand with a Ring flange on the power supply pin of the movable contact soldered. To the in this known vacuum interrupter inner surface of the ceramic insulator against precipitation to protect from metal vapor and thus the internal insulation strength to ensure the vacuum interrupter and around at the same time the bellows against the precipitation of metal vapor to protect is the inside diameter of the ceramic insulator, the power pin of the fixed contact surrounds as small as possible. Through this Measure can however be a deposit of metal vapor the inner surface of the ceramic insulator is not complete avoid (DE-A1- 37 09 585 / US-A-4 672 156).

Bei einer anderen bekannten Vakuumschaltröhre dieser Art ist an der dem Faltenbalg zugekehrten Stirnseite des Keramikisolators zunächst ein Flansch angeordnet, mit dem der Faltenbalg verlötet ist und der über einen kurzen rohrförmigen Ansatz stumpf mit der Stirnfläche des Keramikisolators verlötet ist. Mit Hilfe des kurzen rohrförmigen Ansatzes ist zwischen der Stirnflache des Keramikisolators und dem Flansch ein Spalt vorgegebener Länge geschaffen. Da die Stirnseite des Keramikisolators im Bereich dieses Spaltes nicht metallisiert ist, stellt die den Kontakten abgewandte Stirnfläche des Keramikisolators die innere Spannungsfestigkeit der Vakuumschaltröhre sicher. Dabei kann auf eine besondere Abschirmung für den Keramikisolator verzichtet werden (EP-A1-0 563 830/US-A-5 315 081).In another known vacuum interrupter of this type on the face of the ceramic insulator facing the bellows first arranged a flange with which the bellows and is soldered over a short tubular Approach butt soldered to the face of the ceramic insulator is. With the help of the short tubular approach between the face of the ceramic insulator and the flange created a gap of predetermined length. Because the face of the ceramic insulator in the area of this gap is not metallized is the end face facing away from the contacts of the ceramic insulator the internal dielectric strength of the Vacuum switching tube safe. It can be a special Shielding for the ceramic insulator can be dispensed with (EP-A1-0 563 830 / US-A-5 315 081).

Bei einer weiterhin bekannten Vakuumschaltröhre für Niederspannungsschütze ist für den ringförmig ausgebildeten Keramikisolator ein rohrförmig gestalteter Schirm vorgesehen, der an einem Ende mit einem zu einer Kappe erweiterten Rand versehen ist. Dieser Rand ist mit einem Ansatzring verlötet, der seinerseits mit der den beiden Kontaktstücken zugewandten Stirnfläche des Keramikisolators verlötet ist. Zur Herstellung dieser Vakuumschaltröhre sind mehrere Lötvorgänge erforderlich (DE 33 43 918 A1 / US 4 614 850).In a still known vacuum interrupter for low-voltage contactors is for the ring-shaped ceramic insulator a tubular umbrella is provided which provided at one end with an edge widened into a cap is. This edge is soldered to a neck ring that in turn with the one facing the two contact pieces End face of the ceramic insulator is soldered. For the production this vacuum interrupter are several soldering processes required (DE 33 43 918 A1 / US 4 614 850).

Im übrigen ist es bei der Herstellung von Vakuumschaltröhren bekannt, den Faltenbalg an seinem Ende über einen rohrförmigen Ansatz stirnseitig mit einem Keramikteil zu verlöten (EP 0 040 933 A1) und für das Gehäuse kappenartige Teile aus Kupfer zu verwenden, die mit einer galvanisch aufgebrachten Silberschicht versehen sind, wodurch sich beim Verlöten mit einem Keramikteil oder mit einem Metallteil die Verwendung eines Lötringes erübrigt (WO 95/00 459).Incidentally, it is in the manufacture of vacuum interrupters known the bellows at its end via a tubular Approach to the end with a ceramic part to be soldered (EP 0 040 933 A1) and cap-like parts for the housing Use copper with an electroplated Silver layer are provided, so that when soldering with a ceramic part or with a metal part of a solder ring is unnecessary (WO 95/00 459).

Ausgehend von einer Vakuumschaltröhre mit den Merkmalen des Oberbegriffes des Patentanspruches 1 (US 4 672 156 A) liegt der Erfindung die Aufgabe zugrunde, eine wirksame Abschirmung des Isolators vorzunehmen und dabei eine einfache Herstellung der Vakuumschaltröhre, möglichst in einem einzigen Lötvorgang, zu gewährleisten. Starting from a vacuum interrupter with the characteristics of Preamble of claim 1 (US 4,672,156 A) the invention has for its object an effective shielding to make the isolator and a simple manufacture the vacuum interrupter, if possible in a single soldering process, to ensure.

Zur Lösung dieser Aufgabe ist gemäß der Erfindung vorgesehen, daß dem Isolator ein rohrförmiger Schirm zugeordnet ist, der an seinem einen Ende mit einem flanschartigen Rand versehen ist und der mittels am Rand in Umfangsrichtung verteilt angeordneter Distanznoppen an der den Kontakten zugewandten Stirnflache des Isolators anliegt, und daß die Metallkappe an ihrem mit dem Isolator verlöteten Rand in Umfangsrichtung mit einer Strukturierung in Form einer Wellung oder einer Zahnung mit einer Wellen- bzw. Zahnhöhe von 0,2 bis 0,6 mm versehen ist, wobei die Metallkappe aus Kupfer besteht und zum Zwecke der Verlötung mit Silber beschichtet ist.To achieve this object, the invention provides that the insulator is associated with a tubular screen provided with a flange-like edge at one end and is distributed in the circumferential direction by means of the edge arranged spacer knobs on the contacts facing End face of the insulator rests, and that the metal cap their edge soldered to the insulator in the circumferential direction structuring in the form of corrugation or toothing provided with a shaft or tooth height of 0.2 to 0.6 mm is, the metal cap is made of copper and for the purpose the soldering is coated with silver.

Bei einer derart ausgebildeten Vakuumschaltröhre können die Metallkappe, der Keramikisolator und der Schirm miteinander im gleichen Arbeitsgang verlötet werden, wobei diese Lötung als Verschlußlötung durchgeführt wird. Die Strukturierung des Randes der Metallkappe bildet nämlich schlitzartige Öffnungen, über die die Vakuumschaltröhre vor dem Lötvorgang entgast werden kann. Bei Erreichen der Löttemperatur entsteht aus der Silberschicht der Metallkappe und aus dem Material der Metallkappe genügend Lötmittel, mit dem auch die schlitzartigen Öffnungen vakuumdicht verschlossen werden.With a vacuum interrupter designed in this way, the Metal cap, the ceramic insulator and the screen together be soldered in the same operation, this soldering is carried out as seal soldering. The structuring of the The edge of the metal cap forms slot-like openings, via which the vacuum interrupter degasses before the soldering process can be. When the soldering temperature is reached from the silver layer of the metal cap and from the material the metal cap enough solder with which the slot-like The openings must be closed in a vacuum-tight manner.

Bei geeigneter Ausgestaltung der Vakuumschaltröhre können auch die übrigen Lötvorgänge zur vakuumdichten Verbindung des Faltenbalges einerseits mit dem Isolator und andererseits mit dem beweglichen Stromzuführungsbolzen und zum Verbinden der Metallkappe mit dem feststehenden Stromzuführungsbolzen gleichzeitig mit der Verschlußlötung durchgeführt werden, wenn der Faltenbalg über rohrförmige Ansätze sowohl am Isolator als auch am Ringflansch des bewegbaren Stromzuführungsbolzens stumpf anliegt und der feststehende Stromzuführungsbolzen mittels eines Ringflansches außen an der Metallkappe anliegt. Eine konische Ausbildung des bewegbaren Stromzuführungsbolzen im Bereich des Faltenbalges ermöglicht dabei, den für die Verlötung des Faltenbalges mit dem Ringflansch des bewegbaren Stromzuführungsbolzens erforderlichen Lötring beim Einsetzen der verschiedenen Teile der Vakuumschaltröhre in die Lötform der Lötstelle zentriert zuzuordnen. - Für die Verlötung des Faltenbalges mit dem Keramikisolator wird zweckmäßig eine ringförmige Lötfolie eingesetzt, während zur Verlötung der Metallkappe mit dem feststehenden Stromzuführungsbolzen die Silberbeschichtung der Metallkappe dient. Um bei der Zuordnung der verschiedenen Teile der Vakuumschaltröhre innerhalb einer Lötform die erforderliche Zentrierung der rohrförmigen Abschirmung innerhalb des Keramikisolators zu gewährleisten, kann im übrigen die rohrförmige Abschirmung im Übergangsbereich auf den flanschartigen Rand auf einer Länge von etwa 3 mm einen vergrößerten Durchmesser aufweisen.With a suitable design of the vacuum interrupter also the other soldering processes for vacuum-tight connection of the Bellows on the one hand with the insulator and on the other hand with the movable power supply pin and for connecting the Metal cap with the fixed power supply bolt can be carried out simultaneously with the closure soldering, if the bellows over tubular lugs both on the insulator as well as on the ring flange of the movable power supply bolt butt and the fixed power supply pin by means of a ring flange on the outside of the metal cap is present. A conical design of the movable power supply bolt in the area of the bellows enables the for soldering the bellows to the ring flange of the Movable power supply bolt required solder ring at Insert the different parts of the vacuum interrupter in center the solder shape of the solder joint. - For the The bellows are soldered to the ceramic insulator expediently used an annular solder foil, while for Solder the metal cap to the fixed power supply bolt the silver coating of the metal cap serves. Around when assigning the different parts of the vacuum interrupter the required centering within a solder mold the tubular shield inside the ceramic insulator to ensure, moreover, the tubular shield in the transition area on the flange-like edge on one Length of about 3 mm have an enlarged diameter.

Ein Ausführungsbeispiel der neuen Vakuumschaltröhre ist in den Figuren 1 bis 4 dargestellt. Dabei zeigt

Figur 1
eine Vakuumschaltröhre im Längsschnitt, die
Figuren 2 und 3
die als Teil des Gehäuses verwendete Metallkappe mit einer Randstrukturierung in Form einer Wellung oder Zahnung und
Figur 4
die innerhalb der Vakuumschaltröhre angeordnete Abschirmung für den Isolator.
An embodiment of the new vacuum interrupter is shown in Figures 1 to 4. It shows
Figure 1
a vacuum interrupter in longitudinal section, the
Figures 2 and 3
the metal cap used as part of the housing with an edge structure in the form of a corrugation or toothing and
Figure 4
the shield for the insulator located inside the vacuum interrupter.

Die Vakuumschaltröhre gemäß Figur 1 weist zwei Kontaktstücke 1 und 2 auf, von denen das eine am Ende eines feststehenden Stromzuführungsbolzens 3 und das andere am Ende eines bewegbaren Stromzuführungsbolzens 4 angeordnet ist. Die Kontaktanordnung ist von einem Gehäuse umgeben, das aus der Metallkappe 9, dem hohlzylindrischen Keramikisolator 12 und dem Faltenbalg 13 besteht. Dabei umschließt die Metallkappe 9 den Kontaktbereich der beiden Kontaktstücke 1 und 2, und der Keramikisolator 12 und der Faltenbalg 13 umgeben den Stromzuführungsbolzen 4 des bewegbaren Kontaktstückes 2. Der feststehende Stromzuführungsbolzen 3 ist mit einem Ringflansch 7 versehen und liegt außen an der Metallkappe 9 an, wobei mittels eines Zentrierabsatzes 8 die zentrierte Zuordnung gewährleistet ist. Die Metallkappe 9 besteht aus Kupfer und ist mit einer galvanisch aufgebrachten Silberschicht 18 versehen.The vacuum interrupter according to Figure 1 has two contact pieces 1 and 2, one of which is at the end of a fixed one Power supply pin 3 and the other at the end of a movable Power supply pin 4 is arranged. The contact arrangement is surrounded by a housing that consists of the metal cap 9, the hollow cylindrical ceramic insulator 12 and the Bellows 13 is made. The metal cap 9 encloses the Contact area of the two contact pieces 1 and 2, and the Ceramic insulator 12 and the bellows 13 surround the power supply bolt 4 of the movable contact piece 2. The fixed Power supply bolt 3 is with an annular flange 7 provided and is on the outside of the metal cap 9, wherein the centered assignment by means of a centering shoulder 8 is guaranteed. The metal cap 9 is made of copper and is with an electroplated silver layer 18 Mistake.

Die Metallkappe 9 sitzt mit ihrem Rand stumpf auf einer Stirnfläche des hohlzylindrischen Keramikisolators 12 auf, an dessen anderer Stirnfläche ein rohrförmiger Ansatz 14 des Faltenbalges 13 anliegt. Der Faltenbalg 13 sitzt am anderen Ende mit einem ebenfalls rohrförmigen Ansatz 15 auf einem Ringflansch 6 des bewegbaren Stromzuführungsbolzen 4 auf. Dabei ist der Stromzuführungsbolzen 4 auf einem Längsabschnitt 5, der vom Faltenbalg 13 umgeben ist, konisch ausgebildet.The metal cap 9 sits bluntly with its edge on one End face of the hollow cylindrical ceramic insulator 12 on the other end face of a tubular extension 14 of the Bellows 13 is present. The bellows 13 sits on the other End with a tubular extension 15 on one Ring flange 6 of the movable power supply pin 4. The power supply bolt 4 is on a longitudinal section 5, which is surrounded by the bellows 13, conical.

Bei Zuordnung eines Lötringes zum rohrförmigen Ansatz 15 des Faltenbalges und einer ringförmigen Lotfolie zum rohrförmigen Ansatz 14 des Faltenbalges kann die Verlötung aller Teile der Vakuumschaltröhre in einem einzigen Arbeitsgang erfolgen. Um diese Verlötung als Verschlußlötung durchführen zu können, ist gemäß den Figuren 2 und 3 die Metallkappe 9 an ihrem Rand mit einer Strukturierung versehen, die gemäß Figur 2 die Form einer Wellung 10 oder gemäß Figur 3 die Form einer Zahnung 11 haben kann, wobei die Wellenhöhe bzw. die Zahnhöhe zweckmäßig etwa 0,3 mm beträgt.When assigning a solder ring to the tubular extension 15 of the Bellows and an annular solder foil for tubular Approach 14 of the bellows can be the soldering of all parts of the Vacuum switching tube can be done in a single operation. Around to be able to carry out this soldering as closed soldering, is the metal cap 9 at its edge according to Figures 2 and 3 provided with a structure that the shape according to Figure 2 a corrugation 10 or, according to FIG. 3, the shape of a toothing 11 can have, the wave height or the tooth height expedient is about 0.3 mm.

Zum Schutz der inneren Oberfläche des Keramikisolators 12 ist bei der in Figur 1 dargestellten Vakuumschaltröhre weiterhin eine rohrförmige Abschirmung 16 vorgesehen, die an ihrem einen Ende einen flanschartigen Rand 17 aufweist. Mit diesem Rand 17 liegt die Abschirmung an der gleichen Stirnfläche des Keramikisolators 12 an, auf der auch die Metallkappe 9 aufsitzt. Um dabei einen freien Zugang zu den durch die Strukturierung des Kappenrandes geschaffenen Entgasungsschlitzen zu gewährleitsten, ist der flanschartige Rand 17 der Abschirmung 16 mit Eindrückungen in Form von Distanznoppen 20 versehen, die die Abschirmung 16 gegenüber der Stirnfläche des Keramikisolators 12 um etwa 0,5 bis 1 mm anheben. - Zur Zentrierung der Abschirmung 16 innerhalb des Keramikisolators 12 kann das flanschartige Rohr unmittelbar anschließend an den flanschartigen Rand 17 auf einem Längsabschnitt 21 mit einer Länge von etwa 3 mm einen vergrößerten Durchmesser aufweisen.To protect the inner surface of the ceramic insulator 12 is in the vacuum interrupter shown in Figure 1 continues a tubular shield 16 is provided on its one end has a flange-like edge 17. With this Edge 17 is the shield on the same face of the Ceramic insulator 12 on which the metal cap 9 is also seated. To ensure free access to those through structuring of the cap edge created degassing slots most guaranteed, is the flange-like edge 17 of the shield 16 provided with indentations in the form of spacer knobs 20, the shield 16 against the end face of the ceramic insulator 12 by about 0.5 to 1 mm. - For centering the shield 16 within the ceramic insulator 12 can flange-like tube immediately after the flange-like Edge 17 on a longitudinal section 21 with a length of about 3 mm have an enlarged diameter.

Beim Verlöten der verschiedenen Bauteile der Vakuumschaltröhre wird auch die Abschirmung 16 in diesen Lötprozeß mit einbezogen, wobei sich sowohl eine Verlötung mit der Metallkappe 9 als auch mit der Stirnfläche des Keramikisolators 12 ergibt.When soldering the various components of the vacuum interrupter the shield 16 is also involved in this soldering process included, with both soldering to the metal cap 9 and also with the end face of the ceramic insulator 12 results.

Claims (4)

  1. Vacuum interrupter having a two-pole contact arrangement and a housing (9, 12, 13) which surrounds the contact arrangement, in the case of which the housing comprises a metal cap (9), which is soldered to the current supply bolt (3) of the stationary contact piece (1) and surrounds both the stationary contact and the moving contact (2), and a hollow-cylindrical insulator (12), which is soldered to the metal cap (9) at the end as well as a bellows (13),
    the bellows (13) being soldered on one side at the end of the insulator (12) and on the other side to an annular flange on the current supply bolt (4) of the moving contact (2),
    characterized
    in that the insulator (12) is allocated a tubular screen (16) which is provided, at one of its ends, with a flange-like rim (17) and has spacer studs (20) arranged distributed in the circumferential direction on the rim (17), by means of which spacer studs (20) it rests on that end surface of the insulator (12) which faces the contacts (1, 2),
    and in that the metal cap (9) is provided in the circumferential direction on its rim (19) which is soldered to the insulator (12) with patterning (10, 11) in the form of a corrugation (10) or a tooth system (11) having a corrugation or tooth height of 0.2 to 0.6 mm, the metal cap (9) being composed of copper and being coated with silver (18) for the purpose of soldering.
  2. Vacuum interrupter according to Claim 1,
    characterized
    in that the bellows (13) is butt-soldered via tubular attachments (14, 15) both to the insulator (12) and to the annular flange (6) of the movable current supply bolt (4), the movable current supply bolt (4) being designed to be conical (5) in the region of the bellows.
  3. Vacuum interrupter according to Claim 1 or 2,
    characterized
    in that the stationary current supply bolt (3) is soldered to the metal cap by means of an annular flange (7) which rests on the outside of the metal cap (9).
  4. Vacuum interrupter according to Claim 1,
    characterized
    in that the tubular screen (16) has an enlarged diameter over a length (21) of about 3 mm in the transitional region to the flange-like rim (17).
EP96905738A 1995-03-17 1996-03-08 Vacuum interrupter Expired - Lifetime EP0815573B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19510850A DE19510850C1 (en) 1995-03-17 1995-03-17 Vacuum switch tube for low voltage protection
DE19510850 1995-03-17
PCT/DE1996/000467 WO1996029718A1 (en) 1995-03-17 1996-03-08 Vacuum interrupter

Publications (2)

Publication Number Publication Date
EP0815573A1 EP0815573A1 (en) 1998-01-07
EP0815573B1 true EP0815573B1 (en) 1998-11-25

Family

ID=7757660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96905738A Expired - Lifetime EP0815573B1 (en) 1995-03-17 1996-03-08 Vacuum interrupter

Country Status (6)

Country Link
US (1) US5847347A (en)
EP (1) EP0815573B1 (en)
JP (1) JP2960171B2 (en)
CN (1) CN1068964C (en)
DE (2) DE19510850C1 (en)
WO (1) WO1996029718A1 (en)

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DE29910718U1 (en) * 1999-06-11 1999-12-09 Siemens Ag Vacuum interrupter with a steam screen
JP3842735B2 (en) * 2000-12-13 2006-11-08 シーメンス アクチエンゲゼルシヤフト Connection between container parts of vacuum circuit breaker and vacuum circuit breaker
CN100571736C (en) * 2007-04-16 2009-12-23 北京艺信堂医药研究所 A kind of Chinese medicine preparation for the treatment of habitual abortion
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JP5567952B2 (en) * 2010-09-10 2014-08-06 パナソニック株式会社 Contact device
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DE102013204775A1 (en) * 2013-03-19 2014-09-25 Siemens Aktiengesellschaft Method for producing a component of a vacuum interrupter
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CN105895444A (en) * 2013-11-27 2016-08-24 赵牧青 Vacuum switching tube for improving uniformity of electric field distribution
CN105742111B8 (en) * 2013-11-27 2019-04-12 乐清市川嘉电气科技有限公司 Promote the vacuum switch tube of field distribution uniformity
CN105742112B8 (en) * 2013-11-27 2019-04-12 乐清市川嘉电气科技有限公司 A kind of vacuum switch tube with preferable buffer function
CN105719891B8 (en) * 2013-11-27 2019-04-16 乐清市川嘉电气科技有限公司 Promote the vacuum switch tube of insulation performance
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Also Published As

Publication number Publication date
DE19510850C1 (en) 1996-07-25
JPH10505196A (en) 1998-05-19
US5847347A (en) 1998-12-08
CN1068964C (en) 2001-07-25
CN1183850A (en) 1998-06-03
DE59600874D1 (en) 1999-01-07
EP0815573A1 (en) 1998-01-07
JP2960171B2 (en) 1999-10-06
WO1996029718A1 (en) 1996-09-26

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