EP1032003B1 - Arrangement for sealing a cylindrical oil vessel for a switch - Google Patents

Arrangement for sealing a cylindrical oil vessel for a switch Download PDF

Info

Publication number
EP1032003B1
EP1032003B1 EP00103220A EP00103220A EP1032003B1 EP 1032003 B1 EP1032003 B1 EP 1032003B1 EP 00103220 A EP00103220 A EP 00103220A EP 00103220 A EP00103220 A EP 00103220A EP 1032003 B1 EP1032003 B1 EP 1032003B1
Authority
EP
European Patent Office
Prior art keywords
switch
screw
outer groove
face
insulating cylinder
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
Application number
EP00103220A
Other languages
German (de)
French (fr)
Other versions
EP1032003A3 (en
EP1032003A2 (en
Inventor
Thomas Dipl.-Ing. Dr. Strof
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.)
Maschinenfabrik Reinhausen GmbH
Original Assignee
Maschinenfabrik Reinhausen GmbH
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
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 Maschinenfabrik Reinhausen GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Priority to AT00103220T priority Critical patent/ATE327563T1/en
Publication of EP1032003A2 publication Critical patent/EP1032003A2/en
Publication of EP1032003A3 publication Critical patent/EP1032003A3/en
Application granted granted Critical
Publication of EP1032003B1 publication Critical patent/EP1032003B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0044—Casings; Mountings; Disposition in transformer housing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/55—Oil reservoirs or tanks; Lowering means therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0044—Casings; Mountings; Disposition in transformer housing
    • H01H2009/005—Details concerning the sealing of the oil filled casings

Definitions

  • the invention relates to an arrangement for sealing a cylindrical oil vessel of a switch, preferably a Last Helmlers, diverter switch for tap changer or the like., Which is provided in the boiler, especially in the oil boiler, a transformer and the oil vessel consists of an insulating tube, the two end faces each one Metal flange of a cover or bottom part are associated with a seal, wherein the metal flange is connected via releasable clamping elements which engage in an outer groove of the insulating tube with the insulating tube.
  • Such a sealing arrangement is known from AT-PS 341 624.
  • the outer groove provided in the insulating tube has a rectangular cross section into which a ring projection of a metal ring engages.
  • This metal ring is pulled over clamping screws, which ends in a vertical threaded bore of the metal flange, in the direction of the end face of the insulating tube.
  • the sealing rings between the end face of the insulating cylinder and the metal flange are pressed together.
  • an oversized thickness of the insulating tube must be selected due to the rectangular cross-section of the outer groove.
  • the rectangular cross-section causes in the edges of a notch effect which can lead to damage and which must be compensated with material strength quasi.
  • the object of the invention is therefore to provide an arrangement of the type cited above, on the one hand avoids the above-mentioned disadvantages and on the other hand allows a rational production of such a switch.
  • the arrangement according to the invention is characterized in that the outer groove of the insulating tube in cross section is formed semicircular, that in this semicircular outer groove a round cross-section clamping ring is arranged and that in the metal flange at least one extending at an acute angle to the end face of the insulating threaded bore is provided with a screw, wherein the end face of the screw acts on the clamping ring.
  • the threaded holes or screws are arranged distributed uniformly on the circumference of the metal flange.
  • a plurality of circumferentially distributed holes or screws are provided.
  • the semicircular outer groove in the direction away from its corresponding end face of the insulating tube from the zenith to the outer circumference running, in particular obliquely running executed.
  • this design provides a good attack surface of the end face of the screw on the clamping ring, since the angle can be chosen relatively acute.
  • the clamping ring consists of two parts, in particular of two mutually connectable half rings. This construction also contributes to simpler and thus faster assembly. In addition, manufacturing tolerances can be compensated easier.
  • the screw is a cylinder screw with a hexagon socket.
  • Such machine elements have proven themselves in practice and do not require an increase in the storage of replacement or assembly parts.
  • a load selector With a load selector, the selector shaft is driven with all movable contacts via a gear below the switch head.
  • a load selector combines the functions of a diverter switch and a selector. The advantages of a load selector are that it can be used universally as a star point switch, single-pole switch or as a triangular switch. It has a simple mechanism, wherein all switching contacts can be made of tungsten-sintered material. By this choice of material, a long contact life is achieved.
  • a load selector may also have separate persistent current contacts. In addition, or the drive shaft and the flange connections are arbitrarily adjustable.
  • the load selector changes the stages directly during the dialing process. As soon as the motor drive starts, the gearbox in the switch head begins to pull up the spring accumulator. After complete mounting, the lock of the spring accumulator is released and this actuates the movable contact system of the load selector in quick change from the selected to the preselected stage.
  • the switching time is approx. 40 to 60 ms.
  • This oil vessel consists of an insulating tube 1, wherein on the end face of a metal flange 2 of a cover part is arranged.
  • the sealing takes place via a sealing ring 3 which is provided between the end face of the insulating cylinder 1 and the metal flange 2.
  • This sealing ring 3 is arranged for example in a specially dimensioned for him annular groove 4 of the metal flange 2.
  • the insulating tube 1 has an outer groove 5, in which a clamping ring 6 is arranged. Furthermore, a threaded hole 7 with a screw 8 is provided in the metal flange 2 at an acute angle to the end face of the insulating tube 1. The end face of the screw 8 acts on the clamping ring. 6
  • the clamping ring 6 may consist of two parts, in particular of two mutually connectable half rings.
  • the screw 8 may be a cylinder screw with a hexagon socket.
  • the outer groove 5 is designed running obliquely in the direction away from its corresponding end face. This bevel 9 also serves to facilitate assembly of the clamping ring. 6
  • the sealing of the metal flange 2, which is used as the bottom part, is shown.
  • the metal flange 2 again has the annular groove 4 for the sealing ring 3, which is arranged on the end face of the insulating tube 1.
  • the metal flange 2 has a threaded hole 7 running at an acute angle to the end face of the insulating tube 1 with a screw 8.
  • the outer groove 5 of the clamping ring 6 is provided, on which the end face of the screw 8 acts.
  • the bottom part may have vertical holes 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Manufacture Of Switches (AREA)
  • Insulators (AREA)
  • Level Indicators Using A Float (AREA)
  • Push-Button Switches (AREA)
  • Housings And Mounting Of Transformers (AREA)

Abstract

The arrangement has an outer groove (5) in an insulating tube (1) with a semicircular cross-section, in which a clamping ring (6) of round cross-section is arranged, and at least one threaded bore (7) in a metal flange at an acute angle to the end of the insulating tube with a bolt 8 whose end acts upon he clamp ring.

Description

Die Erfindung betrifft eine Anordnung zur Abdichtung eines zylindrischen Ölgefäßes eines Schalters, vorzugsweise eines Lastwählers, Lastumschalters für Stufenschalter o.dgl., der im Kessel, insbesondere im Ölkessel, eines Transformators vorgesehen ist und das Ölgefäß aus einem Isolierrohr besteht, dessen beiden Stirnflächen je ein Metallflansch eines Deckel- bzw. Bodenteiles mit einer Abdichtung zugeordnet sind, wobei der Metallflansch über lösbare Spannelemente, die in eine Außennut des Isolierrohres eingreifen, mit dem Isolierrohr verbunden ist.The invention relates to an arrangement for sealing a cylindrical oil vessel of a switch, preferably a Lastwählers, diverter switch for tap changer or the like., Which is provided in the boiler, especially in the oil boiler, a transformer and the oil vessel consists of an insulating tube, the two end faces each one Metal flange of a cover or bottom part are associated with a seal, wherein the metal flange is connected via releasable clamping elements which engage in an outer groove of the insulating tube with the insulating tube.

Eine derartige Abdichtungsanordnung ist aus der AT-PS 341 624 bekannt. Bei dieser bekannten Abdichtungsanordnung weist die im Isolierrohr vorgesehene Außennut einen rechteckigen Querschnitt auf, in die ein Ringansatz eines Metallringes eingreift. Dieser Metallring wird über Spannschrauben, die in einer vertikalen Gewindebohrung des Metallflansches endet, in Richtung der Stirnseite des Isolierrohres gezogen. Damit werden auch die Dichtringe zwischen der Stirnseite des Isolierzylinders und dem Metallflansch zusammengepreßt. Als großer Nachteil bei dieser Abdichtung hat sich herausgestellt, daß auf Grund des rechteckigen Querschnittes der Außennut eine überdimensionierte Dicke des Isolierrohres gewählt werden muß. Der rechteckige Querschnitt bedingt in den Kanten eine Kerbwirkung die zu Schäden führen kann und die mit Materialstärke quasi ausgeglichen werden muß.Such a sealing arrangement is known from AT-PS 341 624. In this known sealing arrangement, the outer groove provided in the insulating tube has a rectangular cross section into which a ring projection of a metal ring engages. This metal ring is pulled over clamping screws, which ends in a vertical threaded bore of the metal flange, in the direction of the end face of the insulating tube. Thus, the sealing rings between the end face of the insulating cylinder and the metal flange are pressed together. As a major disadvantage of this seal has been found that an oversized thickness of the insulating tube must be selected due to the rectangular cross-section of the outer groove. The rectangular cross-section causes in the edges of a notch effect which can lead to damage and which must be compensated with material strength quasi.

Aufgabe der Erfindung ist es daher, eine Anordnung der eingangs zitierten Art zu schaffen, die einerseits die oben aufgezeigten Nachteile vermeidet und die anderseits eine rationelle Fertigung eines derartigen Schalters erlaubt.The object of the invention is therefore to provide an arrangement of the type cited above, on the one hand avoids the above-mentioned disadvantages and on the other hand allows a rational production of such a switch.

Die Aufgabe wird durch die Erfindung gelöst. Die erfindungsgemäße Anordnung ist dadurch gekennzeichnet, daß die Außennut des Isolierrohres im Querschnitt halbkreisförmig ausgebildet ist, daß in dieser halbkreisförmigen Außennut ein im Querschnitt runder Spannring angeordnet ist und daß im Metallflansch mindestens eine im spitzen Winkel zur Stirnseite des Isolierrohres verlaufende Gewindebohrung mit einer Schraube vorgesehen ist, wobei die Stirnfläche der Schraube auf den Spannring wirkt. Mit dieser Erfindung ist es erstmals möglich, eine öl- und gasdichte Abdichtung des Ölgefäßes gegenüber dem Traforaum zu erreichen. Ferner erlaubt die Erfindung eine Wandstärke des Isolierrohres zu wählen, die der rechnerisch ermittelten Dimensionierung sehr nahe kommt, da keine Kerbwirkung in der Außennut gegeben ist. Darüber hinaus ist, durch die wenigen Bauteile bedingt, auch eine einfache und dadurch rationelle Montage der Deckel- bzw. Bodenteile am Isolierrohr gewährleistet.The object is achieved by the invention. The arrangement according to the invention is characterized in that the outer groove of the insulating tube in cross section is formed semicircular, that in this semicircular outer groove a round cross-section clamping ring is arranged and that in the metal flange at least one extending at an acute angle to the end face of the insulating threaded bore is provided with a screw, wherein the end face of the screw acts on the clamping ring. With this invention, it is now possible to achieve an oil and gas-tight seal of the oil vessel with respect to the Traforaum. Furthermore, the invention allows to choose a wall thickness of the insulating tube, which comes very close to the calculated dimensioning, since no notch effect is given in the outer groove. In addition, due to the few components, also ensures a simple and thus efficient installation of the lid or floor parts on the insulating tube.

Gemäß einer besonderen Ausgestaltung der Erfindung sind die Gewindebohrungen bzw. Schrauben am Umfang des Metallflansches gleichmäßig verteilt angeordnet. Entsprechend der Kraft, die für die Öl- und Gasdichtheit benötigt wird, werden natürlich mehrere am Umfang verteilte Bohrungen bzw. Schrauben vorgesehen.According to a particular embodiment of the invention, the threaded holes or screws are arranged distributed uniformly on the circumference of the metal flange. Of course, according to the force required for oil and gas tightness, a plurality of circumferentially distributed holes or screws are provided.

Nach einem weiteren Merkmal der Erfindung ist die halbkreisförmige Außennut in der von ihrer korrespondierenden Stirnseite des Isolierrohres abgewandten Richtung vom Zenit zum Außenumfang verlaufend, insbesondere schräg verlaufend, ausgeführt. Dadurch kann der Spannring, auch wenn er einteilig ausgeführt ist, leicht eingesetzt werden. Außerdem bietet diese Ausführung eine gute Angriffsfläche der Stirnseite der Schraube am Spannring, da der Winkel relativ spitz gewählt werden kann.According to a further feature of the invention, the semicircular outer groove in the direction away from its corresponding end face of the insulating tube from the zenith to the outer circumference running, in particular obliquely running executed. This allows the clamping ring, even if it is made in one piece, are easily used. In addition, this design provides a good attack surface of the end face of the screw on the clamping ring, since the angle can be chosen relatively acute.

Gemäß einer Weiterbildung der Erfindung besteht der Spannring aus zwei Teilen, insbesondere aus zwei miteinander verbindbaren Halbringen. Auch diese Konstruktion trägt zur einfacheren und damit schnelleren Montage bei. Darüber hinaus können Fertigungstoleranzen leichter ausgeglichen werden.According to one embodiment of the invention, the clamping ring consists of two parts, in particular of two mutually connectable half rings. This construction also contributes to simpler and thus faster assembly. In addition, manufacturing tolerances can be compensated easier.

Nach einer besonderen Ausgestaltung der Erfindung ist die Schraube eine Zylinderschraube mit einem Innensechskant. Derartige Maschinenelemente haben sich in der Praxis bestens bewährt und bedingen keine Vergrößerung der Lagerung von Ersatz- oder Montageteilen.According to a particular embodiment of the invention, the screw is a cylinder screw with a hexagon socket. Such machine elements have proven themselves in practice and do not require an increase in the storage of replacement or assembly parts.

Die Erfindung wird an Hand von Ausführungsbeispielen, die in der Zeichnung dargestellt sind, näher erläutert.The invention will be explained in more detail with reference to exemplary embodiments, which are illustrated in the drawing.

Es zeigen:

  • Fig. 1 eine Anordnung zur Abdichtung eines Deckelteiles und
  • Fig. 2 eine Anordnung zur Abdichtung eines Bodenteiles eines zylindrischen Ölgefäßes.
Show it:
  • Fig. 1 shows an arrangement for sealing a cover part and
  • Fig. 2 shows an arrangement for sealing a bottom part of a cylindrical oil vessel.

Einführend sei festgehalten, daß in der beschriebenen Ausführungsform gleiche Teile bzw. Zustände mit gleichen Bezugszeichen bzw. gleichen Bauteilbezeichnungen versehen werden, wobei die in der gesamten Beschreibung enthaltenen Offenbarungen sinngemäß auf gleiche Teile bzw. Zustände mit gleichen Bezugszeichen bzw. gleichen Bauteilbezeichnungen übertragen werden können. Auch sind die in der Beschreibung gewählten Lageangaben, wie z.B. oben, unten, seitlich usw. auf die unmittelbar beschriebene sowie dargestellte Figur bezogen und sind bei einer Lageänderung sinngemäß auf die neue Lage zu übertragen.By way of introduction, it should be noted that in the described embodiment, the same parts or states are provided with the same reference numerals or the same component names, the disclosures contained in the entire description can be mutatis mutandis to the same parts or states with the same reference numerals or component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and are to be transferred to the new situation mutatis mutandis when a change in position.

Weiters können auch Einzelmerkmale oder Merkmalskombinationen aus dem gezeigten Ausführungsbeispielen für sich eigenständige, erfindungsgemäße Lösungen darstellen. Die diesbezüglichen erfindungsgemäßen Aufgaben und Lösungen sind den detaillierten Beschreibungen dieser Figuren zu entnehmen.Furthermore, individual features or combinations of features from the exemplary embodiments shown can also represent independent solutions according to the invention. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures.

Gemäß der Fig. 1 ist eine Anordnung zur Abdichtung eines zylindrischen Ölgefäßes eines Lastwählers dargestellt. Natürlich kann diese Anordnung zur Abdichtung auch bei Lastumschaltem Verwendung finden.1, an arrangement for sealing a cylindrical oil vessel of a load selector is shown. Of course, this arrangement can be used for sealing even with Lastumschaltem use.

Bei einem Lastwähler wird über ein unterhalb des Schalterkopfes liegendes Getriebe die Schaltwelle mit allen beweglichen Kontakten angetrieben. Ein Lastwähler kombiniert die Funktionen eines Lastumschalters und eines Wählers. Die Vorteile eines Lastwählers liegen darin, daß universell als Sternpunktschalter, Einzelpolschalter oder als Dreieckschalter einsetzbar ist. Er weist eine einfache Mechanik auf, wobei alle Schaltkontakte aus Wolfram-Sinter-Werkstoff hergestellt sein können. Durch diese Werkstoffwahl ist eine lange Kontaktlebensdauer zu erzielen. Ein Lastwähler kann auch getrennte Dauerstromkontakte aufweisen. Darüber hinaus ist bzw. sind die Antriebswelle und die Flanschanschlüsse beliebig verstellbar.With a load selector, the selector shaft is driven with all movable contacts via a gear below the switch head. A load selector combines the functions of a diverter switch and a selector. The advantages of a load selector are that it can be used universally as a star point switch, single-pole switch or as a triangular switch. It has a simple mechanism, wherein all switching contacts can be made of tungsten-sintered material. By this choice of material, a long contact life is achieved. A load selector may also have separate persistent current contacts. In addition, or the drive shaft and the flange connections are arbitrarily adjustable.

Der Lastwähler wechselt die Stufen direkt während des Wählvorganges. Sobald der Motorantrieb startet, beginnt das Getriebe im Schalterkopf den Federspeicher aufzuziehen. Nach dem kompletten Aufziehen wird die Sperre des Federspeichers aufgehoben und dieser betätigt das bewegliche Kontaktsystem des Lastwählers in Schnellumschaltung von der gewählten zur vorgewählten Stufe. Die Umschaltzeit beträgt ca. 40 bis 60 ms.The load selector changes the stages directly during the dialing process. As soon as the motor drive starts, the gearbox in the switch head begins to pull up the spring accumulator. After complete mounting, the lock of the spring accumulator is released and this actuates the movable contact system of the load selector in quick change from the selected to the preselected stage. The switching time is approx. 40 to 60 ms.

Da ein derartiger Lastwähler direkt in den Ölkessel eines Transformators eingebaut wird, ist es eine der Forderungen, daß das zylinderische Ölgefäß öl- und gasdicht abgedichtet ist.Since such a load selector is installed directly in the oil tank of a transformer, it is one of the demands that the zylinderische oil vessel is sealed oil and gas tight.

Dieses Ölgefäß besteht aus einem Isolierrohr 1, wobei an dessen Stirnfläche ein Metallflansch 2 eines Deckelteiles angeordnet ist. Die Abdichtung erfolgt über einen Dichtring 3 der zwischen der Stirnfläche des Isolierzylinders 1 und dem Metallflansch 2 vorgesehen ist. Dieser Dichtring 3 ist beispielsweise in einer speziell für ihn dimensionierten Ringnut 4 des Metallflansches 2 angeordnet.This oil vessel consists of an insulating tube 1, wherein on the end face of a metal flange 2 of a cover part is arranged. The sealing takes place via a sealing ring 3 which is provided between the end face of the insulating cylinder 1 and the metal flange 2. This sealing ring 3 is arranged for example in a specially dimensioned for him annular groove 4 of the metal flange 2.

Um nun die nötige Kraft für das Zusammendrücken des Dichtringes 3 aufzubringen, weist das Isolierrohr 1 eine Außennut 5 auf, in der ein Spannring 6 angeordnet wird. Ferner ist im Metallflansch 2 im spitzen Winkel zur Stirnseite des Isolierrohres 1 eine Gewindebohrung 7 mit einer Schraube 8 vorgesehen. Die Stirnfläche der Schraube 8 wirkt auf den Spannring 6.In order now to apply the necessary force for the compression of the sealing ring 3, the insulating tube 1 has an outer groove 5, in which a clamping ring 6 is arranged. Furthermore, a threaded hole 7 with a screw 8 is provided in the metal flange 2 at an acute angle to the end face of the insulating tube 1. The end face of the screw 8 acts on the clamping ring. 6

Zur Abdichtung des Ölgefäßes werden mehrere Gewindebohrungen 7 bzw. Schrauben 8 am Umfang des Metallflansches 2, vorzugsweise gleichmäßig verteilt, angeordnet.To seal the oil vessel several threaded holes 7 and screws 8 on the circumference of the metal flange 2, preferably evenly distributed, arranged.

Der Spannring 6 kann aus zwei Teilen, insbesondere aus zwei miteinander verbindbaren Halbringen bestehen. Ebenso kann die Schraube 8 eine Zylinderschraube mit einem Innensechskant sein.The clamping ring 6 may consist of two parts, in particular of two mutually connectable half rings. Likewise, the screw 8 may be a cylinder screw with a hexagon socket.

Um eine optimale Kraftübertragung der Stirnfläche der Schraube 8 auf den Spannring 6 zu erzielen, ist die Außennut 5 in der von ihrer korrespondierenden Stirnseite abgewandten Richtung schräg verlaufend ausgeführt. Diese Schräge 9 dient auch der leichteren Montage des Spannringes 6.In order to achieve an optimal force transmission of the end face of the screw 8 on the clamping ring 6, the outer groove 5 is designed running obliquely in the direction away from its corresponding end face. This bevel 9 also serves to facilitate assembly of the clamping ring. 6

Gemäß der Fig. 2 ist die Abdichtung des Metallflansches 2, der als Bodenteil Verwendung findet, dargestellt. Der Metallflansch 2 weist wieder die Ringnut 4 für den Dichtring 3 auf, der an der Stirnseite des Isolierrohres 1 angeordnet ist. Ferner weist der Metallflansch 2 eine im spitzen Winkel zur Stirnseite des Isolierrohres 1 verlaufende Gewindebohrung 7 mit einer Schraube 8 auf. In der Außennut 5 ist der Spannring 6 vorgesehen, auf den die Stirnfläche der Schraube 8 wirkt.According to FIG. 2, the sealing of the metal flange 2, which is used as the bottom part, is shown. The metal flange 2 again has the annular groove 4 for the sealing ring 3, which is arranged on the end face of the insulating tube 1. Furthermore, the metal flange 2 has a threaded hole 7 running at an acute angle to the end face of the insulating tube 1 with a screw 8. In the outer groove 5 of the clamping ring 6 is provided, on which the end face of the screw 8 acts.

Zur einfacheren Entleerung des Ölgefäßes kann der Bodenteil senkrechte Bohrungen 10 aufweisen.For easier emptying of the oil vessel, the bottom part may have vertical holes 10.

Weiters ist auch beispielhaft die Anordnung eines Kontaktes 11 des Lastwählers aufgezeigt.Furthermore, the arrangement of a contact 11 of the load selector is also shown by way of example.

Die Stirnflächen des Isolierrohres 1 werden durch die Kraft der Schrauben 8, die auf den Spannring 6 wirken, unter Zwischenschaltung des Dichtringes 3, gegen den Metallflansch 2 gepreßt. Damit wird der Dichtring 3 zwischen Isolierrohr 1 und Metallflansch 2 genau auf das für ihn richtige Maß zusammengedrückt, um die erforderliche Öl- und Gasdichtheit zu erreichen. Veränderungen des Isolierrohres 1 in radialer Richtung, sei es während des Betriebes oder während des Trocknungsprozesses des Transformators, haben durch die Anbringung an den Stirnflächen überhaupt keinen Einfluß auf die Dichtungsgüte. Bekanntlich sind Veränderungen des Isolierrohres 1 in Längsrichtung, also Längenänderungen, wesentlich geringer und werden, für die kurze Distanz von Außennut 5 zu Stirnfläche, durch den Dichtring 3 selbst aufgenommen.The end faces of the insulating tube 1 are pressed by the force of the screws 8, which act on the clamping ring 6, with the interposition of the sealing ring 3, against the metal flange 2. Thus, the sealing ring 3 between the insulating tube 1 and metal flange 2 is compressed to exactly the right size for him to achieve the required oil and gas tightness. Changes in the insulating tube 1 in the radial direction, either during operation or during the drying process of the transformer, have no influence on the seal quality by the attachment to the end faces. As is known, changes in the insulating tube 1 in the longitudinal direction, ie changes in length, are much smaller and, for the short distance from the outer groove 5 to the end face, are absorbed by the sealing ring 3 itself.

Abschließend sei der Ordnung halber darauf hingewiesen, daß in der Zeichnung einzelne Bauteile und Baugruppen zum besseren Verständnis der Erfindung unpropotional und maßstäblich verzerrt dargestellt sind.Finally, for the sake of order, it should be noted that in the drawing, individual components and assemblies are shown unprofotional and scaled to better understand the invention.

Claims (5)

  1. Arrangement for sealing a cylindrical oil compartment of a switch, preferably of a selector switch, a diverter switch for tap changers, or a similar switch, which is provided in a tank, especially in an oil tank, of a transformer and with the oil compartment consisting of an insulating cylinder in which both end faces are each contacting a metal flange of a cover or base part with a gasket, whereby the metal flange is connected with the insulating cylinder via detachable clamping elements engaging with an outer groove, wherein the outer groove (5) of the insulating cylinder (1) has a semicircular cross section, a clamping ring with a round cross section (6) is situated in this semicircular outer groove (5), and at least one tapped hole (7) with screw (8) running at a sharp angle to the end face of the insulating cylinder (1) is provided, whereby the end face of the screw (8) acts on the clamping ring (6).
  2. Arrangement according to Claim 1, wherein the tapped holes (7) or screws (8) are uniformly distributed over the circumference of the flange.
  3. Arrangement according to Claim 1 or 2, wherein the semicircular outer groove (5) is designed as running in a direction away from the corresponding end face of the insulating cylinder (1) from the vertex to the outer circumference, especially diagonally.
  4. Arrangement according to at least one of Claims 1 to 3, wherein the clamping ring (6) consists of two parts, especially of two connectable semicircular rings.
  5. Arrangement according to at least one of Claims 1 to 4, wherein the screw (8) is a cylindrical screw with a hexagonal recess.
EP00103220A 1999-02-24 2000-02-17 Arrangement for sealing a cylindrical oil vessel for a switch Expired - Lifetime EP1032003B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT00103220T ATE327563T1 (en) 1999-02-24 2000-02-17 ARRANGEMENT FOR SEALING A CYLINDRICAL OIL VESSEL OF A SWITCH

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0031499A AT409563B (en) 1999-02-24 1999-02-24 ARRANGEMENT FOR SEALING A CYLINDRIC OIL VESSEL OF A SWITCH
AT31499 1999-02-24

Publications (3)

Publication Number Publication Date
EP1032003A2 EP1032003A2 (en) 2000-08-30
EP1032003A3 EP1032003A3 (en) 2001-05-02
EP1032003B1 true EP1032003B1 (en) 2006-05-24

Family

ID=3487291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00103220A Expired - Lifetime EP1032003B1 (en) 1999-02-24 2000-02-17 Arrangement for sealing a cylindrical oil vessel for a switch

Country Status (3)

Country Link
EP (1) EP1032003B1 (en)
AT (2) AT409563B (en)
DE (1) DE50012796D1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012103490A1 (en) * 2012-04-20 2013-10-24 Maschinenfabrik Reinhausen Gmbh Distribution transformer for voltage regulation of local networks
DE102012103489A1 (en) * 2012-04-20 2013-10-24 Maschinenfabrik Reinhausen Gmbh OLTC

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002171624A (en) 2000-11-30 2002-06-14 Mitsubishi Electric Corp Gas-filled type switchgear
EP3761332B8 (en) * 2019-07-01 2023-12-06 Hitachi Energy Ltd An on-load tap changer including an insulation barrier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB584834A (en) * 1945-01-29 1947-01-23 Crabtree & Co Ltd J A Improvements in and connected with electric switches having oil-immersed contacts
AT341624B (en) * 1975-09-29 1978-02-27 Elin Union Ag SEALING ARRANGEMENT FOR A CYLINDRICAL OLD VESSEL OF A LOAD CHANGEOVER FOR TAP SWITCHES

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012103490A1 (en) * 2012-04-20 2013-10-24 Maschinenfabrik Reinhausen Gmbh Distribution transformer for voltage regulation of local networks
DE102012103489A1 (en) * 2012-04-20 2013-10-24 Maschinenfabrik Reinhausen Gmbh OLTC
DE102012103490B4 (en) * 2012-04-20 2015-11-12 Maschinenfabrik Reinhausen Gmbh Distribution transformer for voltage regulation of local networks
DE102012103489B4 (en) * 2012-04-20 2015-11-12 Maschinenfabrik Reinhausen Gmbh On-load tap-changer and its use for voltage regulation in a distribution transformer

Also Published As

Publication number Publication date
EP1032003A3 (en) 2001-05-02
ATA31499A (en) 2002-01-15
ATE327563T1 (en) 2006-06-15
AT409563B (en) 2002-09-25
EP1032003A2 (en) 2000-08-30
DE50012796D1 (en) 2006-06-29

Similar Documents

Publication Publication Date Title
WO2018210892A1 (en) Cable bushing
DE2733195A1 (en) VALVE DEVICE
DE19624101A1 (en) Housing sealing structure and method of assembling the same
DE69310738T2 (en) LOAD SWITCH
EP1032003B1 (en) Arrangement for sealing a cylindrical oil vessel for a switch
DE102005052419A1 (en) Security fitting for screw fasteners especially for pipe flanges using screw connectors with specially shaped heads and with a skirted security plate clamped under the fasteners to prevent access by pliers and other tools
DE3517933C2 (en) Lock mechanism with a pawl shaft
EP0597147A1 (en) Metal clad high voltage installation and an assembly for such an installation
DE19540111B4 (en) Electronics and instrumentation housing
EP0407507A1 (en) Introduction of a lead terminal through the case cover of accumulator cells.
DE3526676C2 (en)
DE3320193C2 (en) Door fitting
DE4414951C1 (en) Load selector or step selector for step transformers
DE9101356U1 (en) Sealing plug for a battery, in particular a multi-cell battery
DE3902326A1 (en) ELECTRIC MOTOR
DE102013221853A1 (en) Housing for an electrical device
DE102014102260B4 (en) Kit for sealing the passage of cables or wires passing through a plate, as well as methods of sealing
AT4808U2 (en) ARRANGEMENT FOR SEALING A CYLINDRIC OIL VESSEL OF A SWITCH
DE3532988C2 (en) Electro-hydraulic switching device
DE4228060C2 (en) Cover for a connection flange on the housing of a hydraulic device, in particular a mobile control block
DE3216371C2 (en)
DE10301879B3 (en) Electrical plug socket element with external fixing thread for securing to mounting plate by partial rotation through less than 360 degrees
EP0920703A1 (en) Movable contact arrangement for a low-voltage circuit breaker with a pivot bearing
DE3220840C2 (en) Flameproof, explosion-proof electrical switching device
DE3343029C1 (en) Contacting ring for flange connections of RF lines

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT DE SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20011026

AKX Designation fees paid

Free format text: AT DE SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MASCHINENFABRIK REINHAUSEN GMBH

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RIN1 Information on inventor provided before grant (corrected)

Inventor name: STROF, THOMAS, DIPL.-ING. DR.

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE SE

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REF Corresponds to:

Ref document number: 50012796

Country of ref document: DE

Date of ref document: 20060629

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070218

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20070227

EUG Se: european patent has lapsed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070901

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070217