EP0066262A1 - Procédé de fabrication d'une ferrure d'extrémité d'isolateur électrique - Google Patents

Procédé de fabrication d'une ferrure d'extrémité d'isolateur électrique Download PDF

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Publication number
EP0066262A1
EP0066262A1 EP82104642A EP82104642A EP0066262A1 EP 0066262 A1 EP0066262 A1 EP 0066262A1 EP 82104642 A EP82104642 A EP 82104642A EP 82104642 A EP82104642 A EP 82104642A EP 0066262 A1 EP0066262 A1 EP 0066262A1
Authority
EP
European Patent Office
Prior art keywords
fitting
complementary parts
complementary
hoop
parts
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.)
Withdrawn
Application number
EP82104642A
Other languages
German (de)
English (en)
French (fr)
Inventor
Alexandre Kaczerginski
Laurent Pargamin
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.)
Ceraver SA
Original Assignee
Ceraver 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 Ceraver SA filed Critical Ceraver SA
Publication of EP0066262A1 publication Critical patent/EP0066262A1/fr
Withdrawn legal-status Critical Current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 present invention relates to a method for manufacturing an electrical insulator fitting and relates to fittings intended, in particular but not exclusively, to equip the ends of composite insulators.
  • Such a fitting schematically has a cavity open on one side to receive the end of a rod made of agglomerated glass fibers which is immobilized by sealing or shrinking. It is generally made of cast iron, steel, aluminum alloy or copper alloy and is produced by casting.
  • FIG. 1 schematically illustrates in section a fitting 1 of this kind and its cavity 2.
  • a side wall 4 is generally provided, forming an internal narrowing 5 of diameter d.
  • the only usable process is casting on a core of sand.
  • This process has many drawbacks.
  • the sand cores leave a rough surface state; in addition they are slightly porous and the degassing which appears at high temperature, and which cannot be released since the cavity is blind, further deteriorates the surface condition.
  • this surface condition must have a quality which allows relative sliding of the anchoring material on the interior surface of the cavity of the fitting in order to obtain a "self-locking" action by a wedging effect. A high specific resistance is thus obtained from the anchoring of the rod thus produced.
  • the object of the present invention is to propose a method of manufacturing a fitting making it possible to obtain a satisfactory internal surface condition.
  • the present invention relates to a method of manufacturing an end fitting of a composite electrical insulator, fitting having an internal cavity with a predetermined surface state to receive the sealed end of an insulating rod; for this, two complementary parts are produced separately having said surface condition by a process chosen from casting on a metal core, or stamping, stamping, stamping of a sheet metal; then said complementary parts are joined to one another by an assembly process of the welding, crimping, riveting type, the joining connector being sufficiently fine so as not to alter said surface condition and to leave the possibility of sliding for " self-locking "explained above.
  • the complementary parts can therefore be made of any flowable material, for example cast iron, steel, aluminum alloy or copper.
  • the complementary parts can be identical, and their contact zone is then located in a plane of symmetry of the fitting.
  • the contact faces may have more or less crenellated or wavy zones favoring their joining or mutual interlocking.
  • a metal hoop at least around the portion of the fitting capable of undergoing the most mechanical stresses.
  • This hoop is put in place by a process known per se. It can be welded to the fitting. Its material is chosen so as to have a coefficient of expansion compatible with that of the complementary parts of the fitting.
  • Means may also be provided for consolidating the assembled zones, external to the complementary parts.
  • the latter may include anchoring grooves for safety keys.
  • FIGS. 2 and 3 show a half-fitting 10 according to the invention. This half-fitting was molded and its surface condition could be perfectly checked. After welding the facing faces 14 of the two half-fittings, the part of the fitting between its upper part and the throttle 15 is surrounded by a one-piece cylindrical hoop 11. The hooped part is capable of withstanding significant mechanical stresses.
  • the hoop is put in place by a process known per se on ribs 12 molded with the wall of the half-fitting 10. These ribs each have a shoulder 16 which serves as a stop for the hoop 11. The latter can be welded locally at the wall of the fitting. We see in Figure 3 the polygonal shape taken by the hoop 11 after its shrinking.
  • Figures 4 and 5 show another variant of half-fitting 20 according to the invention, which is not molded but made from a sheet of a deformable metal.
  • the end 22 of the half-fitting 20 is pierced or cut at 21 after the latter has been formed.
  • a hoop 23 is made around the most mechanically stressed zone 23 by casting in a mold of which a half-shell 24 can be seen in FIG. 4.
  • the material of the hoop 23 is chosen from an appropriate alloy which causes pre-stress on the half-fittings when it cools, by shrinking.
  • FIG. 5 shows a section of the two half-fittings 20 and 30 welded together and provided with their hoop 23.
  • the weld zone has been identified and it will be noted that the half-fittings 20 and 30 are thicker at this zone.
  • FIG. 6 illustrates another embodiment without using a hoop.
  • the two half-fittings 41 and 42 are welded according to a surface, the outer line 40 of which can be seen; in the vicinity of the weld, the conical walls of the half-fittings have angled edges 43 and 44 defining two housings for the edges 45 and 46 of a key 51.
  • a second key 52 is provided to reinforce the opposite weld surface. The upper part of the keys can be optionally closed.

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  • Insulators (AREA)
  • Connection Of Plates (AREA)
EP82104642A 1981-06-01 1982-05-27 Procédé de fabrication d'une ferrure d'extrémité d'isolateur électrique Withdrawn EP0066262A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8110772A FR2506998A1 (fr) 1981-06-01 1981-06-01 Procede de fabrication d'une ferrure d'extremite d'isolateur electrique
FR8110772 1981-06-01

Publications (1)

Publication Number Publication Date
EP0066262A1 true EP0066262A1 (fr) 1982-12-08

Family

ID=9259043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104642A Withdrawn EP0066262A1 (fr) 1981-06-01 1982-05-27 Procédé de fabrication d'une ferrure d'extrémité d'isolateur électrique

Country Status (2)

Country Link
EP (1) EP0066262A1 (enExample)
FR (1) FR2506998A1 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000011685A1 (de) * 1998-08-18 2000-03-02 Siemens Aktiengesellschaft Vorrichtung zur verbindung eines ersten oberleitungsbauteils, das ein axiales abschlussteil aufweist, mit wenigstens einem zweiten oberleitungsbauteil

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH152055A (de) * 1930-10-31 1932-01-15 Matthey Charles Isolator.
CH504085A (de) * 1970-02-12 1971-02-28 Dietz Alfred Hängeisolator
GB1233310A (enExample) * 1969-08-04 1971-05-26

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH152055A (de) * 1930-10-31 1932-01-15 Matthey Charles Isolator.
GB1233310A (enExample) * 1969-08-04 1971-05-26
CH504085A (de) * 1970-02-12 1971-02-28 Dietz Alfred Hängeisolator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000011685A1 (de) * 1998-08-18 2000-03-02 Siemens Aktiengesellschaft Vorrichtung zur verbindung eines ersten oberleitungsbauteils, das ein axiales abschlussteil aufweist, mit wenigstens einem zweiten oberleitungsbauteil

Also Published As

Publication number Publication date
FR2506998B1 (enExample) 1984-01-06
FR2506998A1 (fr) 1982-12-03

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Legal Events

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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

Designated state(s): AT BE CH DE FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19830530

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19841201

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KACZERGINSKI, ALEXANDRE

Inventor name: PARGAMIN, LAURENT