EP0887810B1 - Metallkappe für Verbundisolator - Google Patents

Metallkappe für Verbundisolator Download PDF

Info

Publication number
EP0887810B1
EP0887810B1 EP98401517A EP98401517A EP0887810B1 EP 0887810 B1 EP0887810 B1 EP 0887810B1 EP 98401517 A EP98401517 A EP 98401517A EP 98401517 A EP98401517 A EP 98401517A EP 0887810 B1 EP0887810 B1 EP 0887810B1
Authority
EP
European Patent Office
Prior art keywords
shank
bore
fitting
end fitting
wall
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
EP98401517A
Other languages
English (en)
French (fr)
Other versions
EP0887810A1 (de
Inventor
Jean-Luc Bessede
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.)
Grid Solutions SAS
Original Assignee
GEC Alsthom T&D SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GEC Alsthom T&D SA filed Critical GEC Alsthom T&D SA
Publication of EP0887810A1 publication Critical patent/EP0887810A1/de
Application granted granted Critical
Publication of EP0887810B1 publication Critical patent/EP0887810B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/38—Fittings, e.g. caps; Fastenings therefor
    • H01B17/40—Cementless fittings

Definitions

  • the invention relates to the fixing of fittings on the ends of a tube. made of composite material (glass fibers / epoxy) and more particularly on ends of a hollow shell of electrical insulator with composite structure.
  • a fitting comprises a metal body, for example of an aluminum alloy, having a generally cylindrical bore forming a sleeve in which is inserted and glued one end of the barrel of the electrical insulator. She serves means, anchoring for the electrical insulator:
  • the bores presented in these documents are strictly frustoconical, the space between the wall of a bore and an insulator bar is occupied by an adhesive.
  • This guy bore is not optimal to limit the shear stresses in the adhesive and does not does not eliminate the risk of projection of the fitting if the bar forming the support is replaced by a hollow barrel.
  • the object of the invention is to propose a solution to obtain an improved fixing.
  • a fitting on a hollow barrel of electrical insulator in particular a fixing which provides a good tightness and which does not present a risk of separation at temperatures of use of the insulator above 60 ° C.
  • the invention relates to a fitting for closing one end of a barrel hollow of an electrical insulator with composite structure, this fitting comprising a body in which is formed a bore which forms a sleeve for said barrel and which has a opening and a bottom, the diameter of said opening being less than the diameter of said bottom, the wall of said bore being approximately frustoconical in shape to leave a space which has a variable distance between this wall and a cylindrical surface corresponding to the surface exterior of said barrel, characterized in that said wall has an annular bulge towards the interior of said bore such that said gap continuously increases non-linearly from said opening towards said bottom, the maximum value R of this difference depending on the height H of said bore according to the relationship 0.2% ⁇ R / H ⁇ 20%.
  • this fitting can be hooped around one end of the insulator barrel. by thermal shrinkage, and the fitting of the fitting on the end of the barrel can be reinforced with glue.
  • the invention also relates to a method of closing an electrical insulator by hooping using such a fitting, in which the barrel of the insulator is cooled and the fitting is heated to a temperature above 60 ° C.
  • the fitting 1 is shown in an axial half-section longitudinal.
  • This fitting is intended to be fixed on one end of a barrel hollow in composite material of a composite electrical insulator.
  • a metal body 2 for example of an aluminum alloy, in which is machined a bore 3.
  • the bore 3 forms a sleeve intended to receive the end of the barrel which extends along the longitudinal axis 4 of the barrel.
  • the bore 3 has a wall 5 of substantially frustoconical shape which widens from the opening of the bore indicated by O towards the bottom of the bore indicated by F.
  • this wall 5 also has an annular bulge directed towards the inside of the bore.
  • the surface wall 5 complex of the bore is actually between a TR surface strictly frustoconical defined by the generator passing through points A and B and a strictly cylindrical surface CO defined by the generator passing through the points A and C, this cylindrical surface corresponding to the external surface cylindrical barrel 6 of the insulator.
  • the wall of the bore of the fitting according to the invention provides increased pull-out resistance due to of its frustoconical shape.
  • the annular bulge of the wall of the bore allows compared to a strictly frustoconical wall, to have a less constrained assembly and better distribution of stresses on the entire surface of the fitting / drum interface.
  • the complex surface of the wall of bore 3 is determined according to a finite element calculation method.
  • a finite element calculation method is implemented for example in the software 'ANSYS', version 5.2 sold by the company ANSYS Inc.
  • the temperatures assigned to the ring (T1) and to the tube (T2) are different and correspond to the temperatures used during the shrinking operation of the fitting on the insulator barrel.
  • T1 is greater than 60 ° C and T2 is less than or equal to room temperature.
  • the temperature T3 being lower than the temperature T1
  • the model ring tightens on the model tube which generates a certain deformation of the lower part of it.
  • the shape of the tube model in its lower part is then used to define by modeling the bulging frustoconical surface of the bore of the fitting such that at any temperature less than or equal to T3, there is a compression constraint at the interface tube / fitting uniformly distributed along this interface.
  • the manufacture of a composite electrical insulator with a fitting according to the invention is carried out as follows.
  • the hollow barrel is made for example by a known technique of filament winding of glass fibers impregnated with resin.
  • the filament winding is cut off and the ends of the section are machined to obtain a barrel 6 of insulator whose ends have a certain outside diameter.
  • Each fitting 1 is produced by molding, machining or the like in such a way that it has a bore 3 with a complex swollen surface as indicated above, the opening of the bore being however dimensioned to have a substantially larger diameter small than the outside diameter of the end of the barrel to which the fitting.
  • the fitting is heated until the opening of the bore thereof is sufficiently dilated to allow insertion of the end of the barrel.
  • the end of the barrel is glued.
  • the fitting tightens on the end of the barrel.
  • the fitting is therefore shrunk onto the barrel by thermal shrinkage.

Claims (6)

  1. Beschlag, zum Befestigen an einem Ende eines Hohlschafts (6) eines elektrischen Isolators mit Verbundstruktur, der folgendes aufweist: einen Körper (2), in den eine Bohrung (3) eingearbeitet ist, die eine Muffe für den Schaft bildet, wobei die Wand (S) der Bohrung eine ungefähr kegelstumpfförmige Form aufweist, so daß ein Raum frei gelassen wird, der einen Abstand (δ) darstellt, der zwischen dieser Wand und einer zylindrischen, der Außenfläche des Schafts entsprechenden Fläche CO variabel ist, dadurch gekennzeichnet, daß die Wand (S) eine ringförmige Aufweitung zum Inneren der Bohrung (3) aufweist, derart, daß der Abstand (δ) kontinuierlich nichtlinear ansteigt, wobei der Maximalwert (R) dieses Abstands nach der Beziehung 0,2 % y R/H < 20 % von der Höhe (H) der Bohrung abhängt.
  2. Elektrischer Isolator mit Verbundstruktur, der einen Hohlschaft (6) mit Verbundstruktur aufweist, wovon mindestens ein Ende einen Beschlag nach Anspruch 1 aufweist.
  3. Elektrischer Isolator nach Anspruch 2, bei dem der Beschlag um ein Ende des Schafts (6) durch wärmetechnische Querschnittsverminderung geschrumpft ist.
  4. Elektrischer Isolator nach einem der Ansprüche 2 und 3, bei dem die Befestigung des Beschlags am Ende des Schafts (6) mit Klebstoff verstärkt ist.
  5. Elektrischer Isolator nach Anspruch 4, bei dem der Raum zwischen der Wand (S) der Bohrung und der Außenfläche des Schafts von dem Klebstoff eingenommen wird.
  6. Verfahren zur Befestigung eines Beschlags nach Anspruch 1 an einem elektrischen Isolator nach Anspruch 3, wobei der Schaft (6) des Isolators für einen Frettagevorgang abgekühlt und der Beschlag auf eine Temperatur von über 60 °C erhitzt wird.
EP98401517A 1997-06-26 1998-06-22 Metallkappe für Verbundisolator Expired - Lifetime EP0887810B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9708009 1997-06-26
FR9708009A FR2765385B1 (fr) 1997-06-26 1997-06-26 Ferrure d'isolateur composite

Publications (2)

Publication Number Publication Date
EP0887810A1 EP0887810A1 (de) 1998-12-30
EP0887810B1 true EP0887810B1 (de) 2002-07-31

Family

ID=9508474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98401517A Expired - Lifetime EP0887810B1 (de) 1997-06-26 1998-06-22 Metallkappe für Verbundisolator

Country Status (7)

Country Link
US (1) US6064010A (de)
EP (1) EP0887810B1 (de)
CN (1) CN1208939A (de)
AT (1) ATE221692T1 (de)
DE (1) DE69806862T2 (de)
ES (1) ES2179435T3 (de)
FR (1) FR2765385B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6326552B1 (en) * 1999-12-01 2001-12-04 Hubbel Incorporated Insulator end fitting with non-machined annular attachment flange
CA2349253C (en) * 2000-12-26 2009-11-17 S&C Electric Company Method and arrangement for providing a gas-tight housing joint
CN100341077C (zh) * 2004-07-09 2007-10-03 上海Mwb互感器有限公司 复合绝缘子的制造方法及其模具
JP4376174B2 (ja) * 2004-12-01 2009-12-02 日本碍子株式会社 ポリマーｓｐ碍子
CN105119033B (zh) * 2015-09-10 2016-11-09 四川九洲电器集团有限责任公司 一种软波导管及信号传输系统

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1092976B (de) * 1959-10-13 1960-11-17 Licentia Gmbh Hochspannungsstuetzisolator aus keramischem Material mit einer Kappenarmatur
BE759109A (fr) * 1969-12-31 1971-04-30 Joslyn Mfg And Supply Cy Raccords d'extremite pour tiges en fibre de verre devant resister a descharges de traction elevees
US4005297A (en) * 1972-10-18 1977-01-25 Westinghouse Electric Corporation Vacuum-type circuit interrupters having heat-dissipating devices associated with the contact structures thereof
FR2357993A1 (fr) * 1976-07-09 1978-02-03 Ceraver Isolateur electrique tubulaire, et procede de fabrication de celui-ci
FR2459398A1 (fr) * 1979-06-15 1981-01-09 Viennot Pierre Procede d'assujettissement de tiges en materiau isolant dans des ferrures d'accrochage et dispositif pour sa realisation
US4956525A (en) * 1989-06-05 1990-09-11 G & W Electric Company Electrical insulating bushing assembly, kit for providing same, and method of installing same
DE4421343A1 (de) * 1994-06-17 1995-12-21 Hoechst Ceram Tec Ag Hochspannungsisolator aus Keramik
DE19503324A1 (de) * 1995-02-02 1996-08-08 Hoechst Ceram Tec Ag Isolator mit Kittverbindung und Verfahren zu seiner Herstellung
JP2611689B2 (ja) * 1995-06-29 1997-05-21 日立化成工業株式会社 複合がいし
JP2616493B2 (ja) * 1995-06-29 1997-06-04 日立化成工業株式会社 複合がいし

Also Published As

Publication number Publication date
DE69806862T2 (de) 2003-03-20
ES2179435T3 (es) 2003-01-16
FR2765385B1 (fr) 2003-12-05
ATE221692T1 (de) 2002-08-15
CN1208939A (zh) 1999-02-24
DE69806862D1 (de) 2002-09-05
US6064010A (en) 2000-05-16
FR2765385A1 (fr) 1998-12-31
EP0887810A1 (de) 1998-12-30

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