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EP0815573A1 - Vacuum interrupter - Google Patents

Vacuum interrupter

Info

Publication number
EP0815573A1
EP0815573A1 EP96905738A EP96905738A EP0815573A1 EP 0815573 A1 EP0815573 A1 EP 0815573A1 EP 96905738 A EP96905738 A EP 96905738A EP 96905738 A EP96905738 A EP 96905738A EP 0815573 A1 EP0815573 A1 EP 0815573A1
Authority
EP
European Patent Office
Prior art keywords
insulator
metal cap
soldered
bellows
power supply
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
EP96905738A
Other languages
German (de)
French (fr)
Other versions
EP0815573B1 (en
Inventor
Wolfgang Schwarze
Jörg KUSSEROW
Klaus Oberndörfer
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0815573A1 publication Critical patent/EP0815573A1/en
Application granted granted Critical
Publication of EP0815573B1 publication Critical patent/EP0815573B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—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 is concerned with the structural design of a vacuum holding tube which can be used as a switching element in low-voltage protection.
  • a known vacuum holding tube for low-voltage contactors essentially consists of a two-pole contact arrangement and a housing surrounding this contact arrangement in a vacuum-tight manner, the housing being formed by a metal cap, a hollow cylindrical ceramic insulator and a bellows.
  • the metal cap is soldered to the current supply bolt of the fixed contact piece and on the end face to the insulator
  • the bellows is soldered on the one hand to the end face of the insulator and on the other hand to an annular flange on the power supply bolt of the movable contact.
  • the inside diameter of the ceramic insulator is , which surrounds the power supply bolt of the fixed contact, is made as small as possible. This measure, however, does not completely prevent metal vapor from depositing on the inner surface of the ceramic insulator (DE-Al-37 09 585 / US-A-4 672 156).
  • a flange is first arranged on the end face of the ceramic insulator facing the bellows, with which the bellows is soldered and which has a short tubular shape
  • a tubular shield is provided for the ring-shaped ceramic insulator, which is provided at one end with an edge widened to form a cap. This edge is soldered to an extension ring, which in turn is soldered to the end face of the ceramic insulator facing the two contact pieces.
  • soldering processes are required (DE 33 43 918 AI / US 4 614 850).
  • the object of the invention is to provide effective shielding of the insulator and to ensure simple manufacture of the vacuum interrupter, if possible in a single soldering operation .
  • the insulator is assigned a tubular screen, which is provided at one end with a flange-like edge and which bears by means of spacer knobs distributed circumferentially on the end face of the insulator facing the contacts, and that the metal cap is provided on its edge soldered to the insulator in the circumferential direction with a structure in the form of a corrugation or toothing with a wave or tooth height of 0.2 to 0.6 mm, the metal cap made of copper and Purpose of soldering is coated with silver.
  • the metal cap, the ceramic insulator and the shield can be soldered to one another in the same work step, this soldering being carried out as closure soldering.
  • the structuring of the edge of the metal cap namely forms slot-like openings through which the vacuum holding tube can be degassed prior to the soldering process.
  • the soldering temperature is reached, sufficient solder is produced from the silver layer of the metal cap and from the material of the metal cap, with which the slot-like openings are also 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 pin can also be carried out with the closure soldering if the bellows via tubular approaches on the isola ⁇ gate as well as on the ring flange of the movable power supply bolt butt and the fixed power supply bolt by means of an annular flange on the outside of the metal cap.
  • a conical design of the movable power supply bolt in the area of the bellows enables the bellows to be soldered to the ring flange of the Movable power supply pin required solder ring when inserting the various parts of the vacuum interrupter centered in the solder mold of the solder joint.
  • an annular solder foil is expediently used, while the silver coating of the metal cap is used to solder the metal cap to the fixed power supply bolt.
  • the tubular shield can have an enlarged diameter of about 3 mm in the transition area to the flange-like edge.
  • 1 shows a vacuum interrupter in longitudinal section
  • FIGS. 2 and 3 show the metal cap used as part of the housing with an edge structure in FIG
  • FIG. 4 Shape of a corrugation or toothing and FIG. 4 the shield for the insulator arranged within the vacuum interrupter.
  • the vacuum interrupter according to FIG. 1 has two contact pieces 1 and 2, one of which is arranged at the end of a fixed power supply bolt 3 and the other at the end of a movable power supply bolt 4.
  • the contact arrangement is surrounded by a housing consisting of the metal cap 9, the hollow cylindrical ceramic insulator 12 and the
  • 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 pin 4 of the movable contact piece 2.
  • the fixed power supply pin 3 is provided with an annular flange 7 and is located on the outside Metal cap 9, wherein the centered assignment is ensured by means of a centering shoulder 8.
  • the metal cap 9 is made of copper and is provided with an electroplated silver layer 18.
  • the edge of the metal cap 9 sits bluntly on an end face of the hollow cylindrical ceramic insulator 12, on the other end face of which a tubular extension 14 of the bellows 13 bears.
  • the bellows 13 sits at the other end with a likewise tubular extension 15 on an annular flange 6 of the movable power supply bolt 4.
  • the power supply pin 4 is conical on a longitudinal section 5, which is surrounded by the bellows 13.
  • the metal cap 9 is provided at its edge with a structure according to FIGS. 2 and 3, which may have the shape of a corrugation 10 according to FIG. 2 or the shape of a toothing 11 according to FIG
  • the wave height or the tooth height is expediently about 0.3 mm.
  • a tubular shield 16 is further provided in the vacuum interrupter shown in FIG. 1, which has a flange-like edge 17 at one end. With this edge 17, the shield rests on the same end face of the ceramic insulator 12 on which the metal cap 9 is also seated.
  • the flange-like edge 17 of the shield 16 is provided with indentations in the form of spacer knobs 20. which raise the shield 16 relative to the end face of the ceramic insulator 12 by approximately 0.5 to 1 mm.
  • the flange-like tube can have an enlarged diameter immediately after the flange-like edge 17 on a longitudinal section 21 with a length of about 3 mm.
  • the shield 16 is also included in this soldering process, which results in both soldering with the metal cap 9 and with the end face of the ceramic insulator 12.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

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

Beschreibungdescription

VakuumschaltröhreVacuum interrupter

Die Erfindung liegt auf dem Gebiet der elektrischen Schalter und befaßt sich mit der konstruktiven Ausgestaltung einer Vakuumsehaltröhre, die als Schaltelement in Niederspannungs- schützen verwendet werden kann.The invention is in the field of electrical switches and is concerned with the structural design of a vacuum holding tube which can be used as a switching element in low-voltage protection.

Eine bekannte Vakuumsehaltröhre für Niederspannungsschütze besteht im wesentlichen aus einer zweipoligen Kontaktanord¬ nung und einem diese Kontaktanordnung vakuumdicht umgebenden Gehäuse, wobei das Gehäuse von einer Metallkappe, einem hohlzylindrischen Keramikisolator und einem Faltenbalg gebil- det wird. Dabei ist zum einen die Metallkappe mit dem Strom¬ zuführungsbolzen des feststehenden KontaktStückes und stirn¬ seitig mit dem Isolator und zum anderen der Faltenbalg einer¬ seits 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 Isolations¬ festigkeit der Vakuumsehaltröhre zu gewährleisten und um zugleich den Faltenbalg gegen den Niederschlag von Metall- dampf zu schützen, ist der Innendurchmesser des Keramikisola¬ tors, der den Stromzuführungsbolzen des feststehenden Kontak¬ tes 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-Al- 37 09 585/US-A-4 672 156).A known vacuum holding tube for low-voltage contactors essentially consists of a two-pole contact arrangement and a housing surrounding this contact arrangement in a vacuum-tight manner, the housing being formed by a metal cap, a hollow cylindrical ceramic insulator and a bellows. On the one hand, the metal cap is soldered to the current supply bolt of the fixed contact piece and on the end face to the insulator, and on the other hand the bellows is soldered on the one hand to the end face of the insulator and on the other hand to an annular flange on the power supply bolt of the movable contact. In order to protect the inner surface of the ceramic insulator against the precipitation of metal vapor in this known vacuum interrupter and thus to ensure the inner insulation strength of the vacuum holding tube and at the same time to protect the bellows against the precipitation of metal vapor, the inside diameter of the ceramic insulator is , which surrounds the power supply bolt of the fixed contact, is made as small as possible. This measure, however, does not completely prevent metal vapor from depositing on the inner surface of the ceramic insulator (DE-Al-37 09 585 / US-A-4 672 156).

Bei einer anderen bekannten Vakuumschaltröhre dieser Art ist an der dem Faltenbalg zugekehrten Stirnseite des Keramikiso¬ lators zunächst ein Flansch angeordnet, mit dem der Falten- balg verlötet ist und der über einen kurzen röhrför igenIn another known vacuum interrupter of this type, a flange is first arranged on the end face of the ceramic insulator facing the bellows, with which the bellows is soldered and which has a short tubular shape

Ansatz stumpf mit der Stirnfläche des Keramikisolators verlö- tet ist. Mit Hilfe des kurzen rohrförmigen Ansatzes ist zwischen der Stirnfläche des Keramikisolators und dem Flansch ein Spalt vorgegebener Länge geschaffen. Da die Stirnseite des Keramikisolators im Bereich dieses Spaltes nicht metalli¬ siert ist, stellt die den Kontakten abgewandte Stirnfläche des Keramikisolators die innere Spannungsfestigkeit der Vakuumsehaltröhre sicher. Dabei kann auf eine besondere Abschirmung für den Keramikisolator verzichtet werden (EP-Al- 0 563 830/US-A-5 315 081) .Approach blunt with the end face of the ceramic insulator is. With the help of the short tubular extension, a gap of a predetermined length is created between the end face of the ceramic insulator and the flange. Since the end face of the ceramic insulator is not metallized in the area of this gap, the end face of the ceramic insulator facing away from the contacts ensures the internal dielectric strength of the vacuum holding tube. A special shielding for the ceramic insulator can be dispensed with (EP-Al-0 563 830 / US-A-5 315 081).

Bei einer weiterhin bekannten Vakuumsehaltröhre für Nieder¬ spannungsschütze ist für den ringförmig ausgebildeten Kerami¬ kisolator ein rohrförmig gestalteter Schirm vorgesehen, der an einem Ende mit einem zu einer Kappe erweiterten Rand ver- sehen ist. Dieser Rand ist mit einem Ansatzring verlötet, der seinerseits mit der den beiden Kontaktstücken zugewandten Stirnfläche des Keramikisolators verlötet ist. Zur Herstel¬ lung dieser Vakuumsehaltröhre sind mehrere Lötvorgänge erforderlich (DE 33 43 918 AI / US 4 614 850).In a vacuum holding tube for low-voltage contactors, which is also known, a tubular shield is provided for the ring-shaped ceramic insulator, which is provided at one end with an edge widened to form a cap. This edge is soldered to an extension ring, which in turn is soldered to the end face of the ceramic insulator facing the two contact pieces. To manufacture this vacuum holding tube, several soldering processes are required (DE 33 43 918 AI / US 4 614 850).

Im übrigen ist es bei der Herstellung von Vakuumschaltröhren bekannt, den Faltenbalg an seinem Ende über einen rohrförmi¬ gen Ansatz stirnseitig mit einem Keramikteil zu verlöten (EP 0 040 933 AI) 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) .For the rest, it is known in the manufacture of vacuum interrupters to solder the bellows at the end to a ceramic part at the end via a tubular extension (EP 0 040 933 AI) and to use cap-like parts made of copper for the housing, which are galvanically applied silver layer are provided, whereby the use of a solder ring is unnecessary when soldering with a ceramic part or with a metal part (WO 95/00 459).

Ausgehend von einer Vakuumschaltrδhre 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 Lötvor- gang, zu gewährleisten. 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 Stirnfläche 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.Starting from a vacuum interrupter with the features of the preamble of claim 1 (US 4,672,156 A), the object of the invention is to provide effective shielding of the insulator and to ensure simple manufacture of the vacuum interrupter, if possible in a single soldering operation . To achieve this object, according to the invention it is provided that the insulator is assigned a tubular screen, which is provided at one end with a flange-like edge and which bears by means of spacer knobs distributed circumferentially on the end face of the insulator facing the contacts, and that the metal cap is provided on its edge soldered to the insulator in the circumferential direction with a structure in the form of a corrugation or toothing with a wave or tooth height of 0.2 to 0.6 mm, the metal cap made of copper and Purpose of 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 Öffnun¬ gen, über die die Vakuumsehaltröhre vor dem Lötvorgang ent¬ gast werden kann. Bei Erreichen der Löttemperatur entsteht aus der Silberschicht der Metallkappe und aus dem Material der Metallkappe genügend Lötmittel, mit dem auch die schlitz¬ artigen Öffnungen vakuumdicht verschlossen werden.With a vacuum interrupter designed in this way, the metal cap, the ceramic insulator and the shield can be soldered to one another in the same work step, this soldering being carried out as closure soldering. The structuring of the edge of the metal cap namely forms slot-like openings through which the vacuum holding tube can be degassed prior to the soldering process. When the soldering temperature is reached, sufficient solder is produced from the silver layer of the metal cap and from the material of the metal cap, with which the slot-like openings are also closed in a vacuum-tight manner.

Bei geeigneter Ausgestaltung der Vakuumsehaltröhre 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 Isola¬ tor als auch am Ringflansch des bewegbaren Stromzuführungs- bolzens stumpf anliegt und der feststehende Stromzuführungs- bolzen mittels eines Ringflansches außen an der Metallkappe anliegt. Eine konische Ausbildung des bewegbaren Stromzufüh- rungsbolzen 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 Stromzufüh¬ rungsbolzen die Silberbeschichtung der Metallkappe dient. Um bei der Zuordnung der verschiedenen Teile der Vakuumschalt¬ röhre 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 holding tube, 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 pin can also be carried out with the closure soldering if the bellows via tubular approaches on the isola ¬ gate as well as on the ring flange of the movable power supply bolt butt and the fixed power supply bolt by means of an annular flange on the outside of the metal cap. A conical design of the movable power supply bolt in the area of the bellows enables the bellows to be soldered to the ring flange of the Movable power supply pin required solder ring when inserting the various parts of the vacuum interrupter centered in the solder mold of the solder joint. For the soldering of the bellows to the ceramic insulator, an annular solder foil is expediently used, while the silver coating of the metal cap is used to solder the metal cap to the fixed power supply bolt. In order to ensure the necessary centering of the tubular shield within the ceramic insulator when assigning the different parts of the vacuum interrupter within a solder mold, the tubular shield can have an enlarged diameter of about 3 mm in the transition area to the flange-like edge.

Ein Ausfύhrungsbeispiel 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 Me- tallkappe mit einer Randstrukturierung inAn exemplary embodiment of the new vacuum interrupter is shown in FIGS. 1 to 4. 1 shows a vacuum interrupter in longitudinal section, FIGS. 2 and 3 show the metal cap used as part of the housing with an edge structure in FIG

Form einer Wellung oder Zahnung und Figur 4 die innerhalb der Vakuumschaltröhre ange¬ ordnete Abschirmung für den Isolator.Shape of a corrugation or toothing and FIG. 4 the shield for the insulator arranged within 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 beweg¬ baren Stromzuführungsbolzens 4 angeordnet ist. Die Kontakt¬ anordnung ist von einem Gehäuse umgeben, das aus der Metall- kappe 9, dem hohlzylindrischen Keramikisolator 12 und demThe vacuum interrupter according to FIG. 1 has two contact pieces 1 and 2, one of which is arranged at the end of a fixed power supply bolt 3 and the other at the end of a movable power supply bolt 4. The contact arrangement is surrounded by a housing consisting of the metal cap 9, the hollow cylindrical ceramic insulator 12 and the

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 Stromzu¬ führungsbolzen 4 des bewegbaren Kontaktstückes 2. Der fest- stehende 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.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 pin 4 of the movable contact piece 2. The fixed power supply pin 3 is provided with an annular flange 7 and is located on the outside Metal cap 9, wherein the centered assignment is ensured by means of a centering shoulder 8. The metal cap 9 is made of copper and is provided with an electroplated silver layer 18.

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 Längsab¬ schnitt 5, der vom Faltenbalg 13 umgeben ist, konisch ausge¬ bildet.The edge of the metal cap 9 sits bluntly on an end face of the hollow cylindrical ceramic insulator 12, on the other end face of which a tubular extension 14 of the bellows 13 bears. The bellows 13 sits at the other end with a likewise tubular extension 15 on an annular flange 6 of the movable power supply bolt 4. The power supply pin 4 is conical on a longitudinal section 5, which is surrounded by the bellows 13.

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.By assigning a solder ring to the tubular extension 15 of the bellows and an annular solder foil to the tubular extension 14 of the bellows, all parts of the vacuum interrupter can be soldered in a single operation. In order to be able to carry out this soldering as closure soldering, the metal cap 9 is provided at its edge with a structure according to FIGS. 2 and 3, which may have the shape of a corrugation 10 according to FIG. 2 or the shape of a toothing 11 according to FIG The wave height or the tooth height is expediently 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 auf¬ sitzt. Um dabei einen freien Zugang zu den durch die Struktu¬ rierung 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 Kerami¬ kisolators 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 flanschar- tigen 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, a tubular shield 16 is further provided in the vacuum interrupter shown in FIG. 1, which has a flange-like edge 17 at one end. With this edge 17, the shield rests on the same end face of the ceramic insulator 12 on which the metal cap 9 is also seated. In order to ensure free access to the degassing slots created by the structure of the edge of the cap, the flange-like edge 17 of the shield 16 is provided with indentations in the form of spacer knobs 20. which raise the shield 16 relative to the end face of the ceramic insulator 12 by approximately 0.5 to 1 mm. - To center the shield 16 within the ceramic insulator 12, the flange-like tube can have an enlarged diameter immediately after the flange-like edge 17 on a longitudinal section 21 with a length of about 3 mm.

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

Claims

Patentansprüche claims 1. Vakuumsehaltröhre mit einer zweipoligen Kontaktanordnung und einem die Kontaktanordnung umgebenden Gehäuse, bei der das Gehäuse aus einer mit dem Stromzuführungsbolzen des feststehenden Kontaktstückes verlöteten und sowohl den feststehenden als auch den bewegbaren Kontakt umgebenden Metallkappe und aus einem hohlzylindrischen, stirnseitig mit der Metallkappe verlöteten Isolator sowie aus einem Falten- balg besteht, wobei der Faltenbalg einerseits stirnseitig mit dem Isolator und andererseits mit einem Ringflansch am Stromzuführungsbol¬ zen des bewegbaren Kontaktes verlötet ist, d a d u r c h g e k e n n z e i c h n e t , daß dem Isolator (12) ein rohrförmiger Schirm (16) zugeordnet ist, der an seinem einen Ende mit einem flanschartigen Rand (17) versehen ist und der mittels am Rand (17) in Umfangs¬ richtung verteilt angeordneter Distanznoppen (20) an der den Kontakten (1,2) zugewandten Stirnfläche des Isolators (12) anliegt, und daß die Metallkappe (9) an ihrem mit dem Isolator (12) verlöteten Rand (19) in Umfangsrichtung mit einer Strukturie¬ rung (10,11) in Form einer Wellung (10) oder einer Zahnung (11) mit einer Wellen- bzw. Zahnhόhe von 0,2 bis 0,6 mm versehen ist, wobei die Metallkappe (9) aus Kupfer besteht und zum Zwecke der Verlötung mit Silber (18) beschichtet ist.1.Vacuum holding tube with a two-pole contact arrangement and a housing surrounding the contact arrangement, in which the housing consists of a soldered to the power supply bolt of the fixed contact piece and both the fixed and the movable contact surrounding metal cap and a hollow cylindrical insulator, the end face soldered to the metal cap, and consists of a bellows, the bellows being soldered on one side to the insulator on the end face and on the other hand to an annular flange on the current supply bolt of the movable contact, characterized in that the insulator (12) is assigned a tubular shield (16) which is attached to its one end is provided with a flange-like edge (17) and which rests on the end face of the insulator (12) facing the contacts (1, 2) by means of spacer knobs (20) distributed around the edge (17) in the circumferential direction, and that Metal cap (9) on your with de In the insulator (12), the edge (19) is soldered in the circumferential direction with a structure (10, 11) in the form of a corrugation (10) or a toothing (11) with a shaft or tooth height of 0.2 to 0.6 mm is provided, the metal cap (9) made of copper and coated with silver (18) for the purpose of soldering. 2. Vakuums ehalt röhre nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß der Faltenbalg (13) über rohrförmige Ansätze (14,15) sowohl mit dem Isolator (12) als auch mit dem Ringflansch (6) des bewegbaren Stromzuführungsbolzens (4) stumpf verlötet ist, wobei der bewegbare Stromzuführungsbolzen (4) im Bereich des Faltenbalges konisch (5) ausgebildet ist.2. Vacuum ehalt tube according to claim 1, characterized in that the bellows (13) via tubular lugs (14, 15) both with the insulator (12) and with the ring flange (6) of the movable power supply bolt (4) is butt-soldered, wherein the movable power supply bolt (4) is conical (5) in the region of the bellows. 3. Vakuumschaltröhre nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , daß der feststehende Stromzuführungsbolzen (3) mittels eines außen an der Metallkappe (9) anliegenden Ringflansches (7) mit der Metallkappe verlötet ist.3. vacuum interrupter according to claim 1 or 2, characterized in that the fixed power supply bolt (3) is soldered to the metal cap by means of an annular flange (7) lying on the outside of the metal cap (9). 4. Vakuumschaltröhre nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß die rohrförmige Abschirmung (16)im Übergangsbereich auf den flanschartigen Rand (17) auf einer Länge (21) von etwa 3 mm einen vergrößerten Durchmesser aufweist. 4. Vacuum interrupter according to claim 1, so that the tubular shield (16) has an enlarged diameter in the transition region to the flange-like edge (17) over a length (21) of approximately 3 mm.
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 true EP0815573A1 (en) 1998-01-07
EP0815573B1 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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Also Published As

Publication number Publication date
CN1183850A (en) 1998-06-03
DE19510850C1 (en) 1996-07-25
JPH10505196A (en) 1998-05-19
WO1996029718A1 (en) 1996-09-26
US5847347A (en) 1998-12-08
JP2960171B2 (en) 1999-10-06
DE59600874D1 (en) 1999-01-07
EP0815573B1 (en) 1998-11-25
CN1068964C (en) 2001-07-25

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