EP1178496A1 - Schaft-Isolator-Herstellungsverfahren - Google Patents

Schaft-Isolator-Herstellungsverfahren Download PDF

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Publication number
EP1178496A1
EP1178496A1 EP01401909A EP01401909A EP1178496A1 EP 1178496 A1 EP1178496 A1 EP 1178496A1 EP 01401909 A EP01401909 A EP 01401909A EP 01401909 A EP01401909 A EP 01401909A EP 1178496 A1 EP1178496 A1 EP 1178496A1
Authority
EP
European Patent Office
Prior art keywords
core
envelope
molded
insulator
molding
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
EP01401909A
Other languages
English (en)
French (fr)
Other versions
EP1178496B1 (de
Inventor
Emmanuel Brocard
Guy Thevenet
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.)
Societe Europeenne dIsolateurs en Verre et Composite SEDIVER SA
Original Assignee
Societe Europeenne dIsolateurs en Verre et Composite SEDIVER 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 Societe Europeenne dIsolateurs en Verre et Composite SEDIVER SA filed Critical Societe Europeenne dIsolateurs en Verre et Composite SEDIVER SA
Publication of EP1178496A1 publication Critical patent/EP1178496A1/de
Application granted granted Critical
Publication of EP1178496B1 publication Critical patent/EP1178496B1/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
    • H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
    • 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
    • H01B17/20—Pin insulators

Definitions

  • the invention relates to a method of manufacturing an electrical insulator rigid rod intended to support an electrical conductor and comprising a electrically insulating rigid core molded and having one end upper, a lower end with a bore intended to receive said rod and which extends in an axial direction between said ends upper and lower, and an outer surface covered by a dielectric shell from molding and having an outer surface profile defining at least one groove for supporting said conductor electric and coaxial annular fins to the bore.
  • Such an insulator is generally intended to be installed on a pylon of high or medium voltage line to support for example a conductor electrical such as a cable from an insulated or uninsulated electrical transmission line, while keeping it electrically isolated from the pylon.
  • such an insulator is generally subjected to stresses high mechanical due in particular to the weight of the cable it supports, all ensuring significant electrical insulation.
  • Conventionally, such insulator was made of glass or porcelain, and the recent development of materials leads to making this type of insulator for example from material composite, which allows a significant gain in weight compared to glass as well as a gain in manufacturing cost, but presents difficulties linked to molding of these composite materials.
  • vents and weights intended to facilitate the flow of the material in the mold and to make sure that the pressure is homogeneous in the part molded to prevent the appearance of mechanical irregularities such as holes or shrinkage.
  • the defect of these solutions is to complicate the form of the mold, to increase manufacturing cycle times and to require a empirical development which represent an additional manufacturing cost.
  • the object of the invention is to remedy these drawbacks.
  • the subject of the invention is a method of manufacturing an insulator rigid electric rod intended to support an electric conductor and comprising a rigid electrically insulating core from molding and having an upper end, a lower end with a bore intended to receive said rod and which extends in an axial direction between said upper and lower ends, and an outer surface covered by a dielectric envelope coming from molding and having a profiled outer surface defining at least one groove for supporting said electrical conductor and annular fins coaxial with the bore, characterized in that said core is molded in such a way that its surface outer defines radial ribs which extend in the direction axial from the upper end of the core, these ribs being spaced between them a distance substantially constant and substantially equal to the thickness of the core.
  • Such a process simplifies the manufacture by molding of a rod insulator in composite material by overcoming the problems associated with extra molding thicknesses without altering the mechanical properties and of the insulator and without increasing the manufacturing cost of the insulator.
  • the core and the dielectric shell are molded with the same material, the envelope being overmolded on said core, a optimal cohesion between the core and the envelope.
  • the core and said dielectric shell are molded with different materials, the envelope being fitted on said core, we can choose the best materials to optimize the manufacturing cost of the insulator according to mechanical and electrical performance desired.
  • the core is made of epoxy, and / or silicone, and / or thermoplastic material, and / or polyester, and / or material composite, we get a cheap insulator.
  • the core is formed from several pieces coming molding and each having a substantially constant thickness, it is possible to obtain a large, large insulator.
  • Figure 1 is a sectional view showing the core of an insulator carried out with the method according to the invention.
  • Figure 2 is a top view of the core of an insulator made with the method according to the invention.
  • Figure 3 is a perspective view of the core of an insulator made with the method according to the invention.
  • Figure 4 is a sectional view of a second insulator made with the method according to the invention.
  • FIG. 1 appears an electrical insulator rod I made with the method according to the invention which is seen according to a section plane comprising the axis longitudinal A.
  • this insulator consists mainly of two parts which are an envelope E represented in dashed lines and whose profiled outer surface defines fins annulars A1, A2 which extend coaxially largely along axis A, and a nucleus N whose outer surface is covered by envelope E.
  • the exterior surface of envelope E also defines upper part of the insulator and of the core N a groove C in the form of a half-cylinder which is intended to support an electric cable arranged according to a axis normal to the plane of the figure.
  • a bore T having a thread F produced in the core N, coaxial with the main axis A is intended to receive the support rod of the insulator which can be fixed here by screwing.
  • the body of the N nucleus is represented by a hatched area and includes radial ribs R, extending along planes including the axis longitudinal A from the upper end of the core.
  • the insulator has a relatively thick important, especially if it is measured along an axis contained in the plane of the figure and perpendicular to the axis A, crossing the nucleus. Else apart, the thickness of the insulator is very small, for example annular fins.
  • Figure 1 also shows that the thickness of the envelope E alone, as well as that of the nucleus N alone, are weaker, and especially relatively constant.
  • the method according to the invention consists in producing the core N with a relatively constant thickness during a first operation of molding, then, after cooling and stabilization of the core N, to be poured the envelope E by overmolding on this core N which will have been placed in a other mold, so that this second molding operation allows both to make the second part E with a thickness relatively constant and equal to that of nucleus N.
  • the method according to the invention makes it possible to produce an insulator having thicknesses at the same time important and very variable, without having to be confronted with problems of molding allowances.
  • Figure 2 which is a top view of the core N alone, shows sixteen radial ribs R regularly spaced apart on the periphery of the nucleus N. More particularly, each fin is arranged along a plane normal to the plane of the figure, and including the axis A which is here normal to the plan of the figure. The distance between two consecutive ribs is constant and substantially equal to the thickness of the core and the thickness a rib.
  • Figure 3 shows in perspective the core with its radial ribs R uniformly distributed around the axis A. These radial ribs R contribute in addition to obtaining a mechanical interface between the nucleus N and the envelope E of good quality by increasing the contact surface.
  • FIG 4 appears an insulator I made with the method according to the invention which is seen along a section plane comprising the longitudinal axis A.
  • this isolator still includes a envelope E shown in solid lines with annular fins A3, A4, A5, A6 which extend coaxially essentially perpendicular to axis A, and a core N represented in dotted lines, which is embedded inside of the envelope E.
  • This insulator comprises in its upper part a groove C in the form of a half-cylinder which is intended to support a cable electric arranged on an axis normal to the plane of the figure and in its part lower, a bore T having a thread F produced in the core N, coaxial to the main axis A is intended to receive a rod, fixed by screwing.
  • this insulator is different from that of Figure 1 but its nucleus N is identical to that of FIG. 1.
  • the core and the envelope of the insulator according to the invention can be made by molding an epoxy resin, a silicone, a polyester, or any other thermoplastic and / or composite material.
  • the nucleus N and envelope E can be made with the same material or with different materials so that performance can be adapted mechanical, electrical, and the cost of manufacturing the insulator in choosing the most suitable available material (s) existing on the market.
  • the envelope can be directly overmolded on the core so that there will be no interface between these two parts. If we uses different materials to make the shell and the core, the envelope can be fitted onto the core and fixed to it by gluing or by any other assembly process with or without prior treatment (corona treatment, cold plasma ....) to improve the interface sheath / core.
  • the envelope, the core or the parts constituting the core may be molded using an injection molding process, and / or by compression, and / or transfer to further reduce the manufacturing cost or to use a molding technique specific to a type of material particular.
  • the manufacturing method according to the invention applies to a envelope E of insulator in the form of a skirt like that of FIG. 1 but also to an envelope E with annular fins A1, A2 which extend completely radially with respect to the axis A.

Landscapes

  • Insulating Bodies (AREA)
  • Insulators (AREA)
EP01401909A 2000-08-01 2001-07-17 Schaft-Isolator-Herstellungsverfahren Expired - Lifetime EP1178496B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0010142A FR2812754B1 (fr) 2000-08-01 2000-08-01 Procede de fabrication d'un isolateur electrique a tige
FR0010142 2000-08-01

Publications (2)

Publication Number Publication Date
EP1178496A1 true EP1178496A1 (de) 2002-02-06
EP1178496B1 EP1178496B1 (de) 2006-04-26

Family

ID=8853194

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01401909A Expired - Lifetime EP1178496B1 (de) 2000-08-01 2001-07-17 Schaft-Isolator-Herstellungsverfahren

Country Status (12)

Country Link
US (1) US6485598B2 (de)
EP (1) EP1178496B1 (de)
JP (1) JP2002093259A (de)
CN (1) CN1222955C (de)
AR (1) AR030077A1 (de)
AU (1) AU772038B2 (de)
BR (1) BR0103049A (de)
CA (1) CA2354654A1 (de)
ES (1) ES2260180T3 (de)
FR (1) FR2812754B1 (de)
NZ (1) NZ513288A (de)
ZA (1) ZA200106249B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0401954A (pt) * 2004-06-11 2006-06-06 Pirelli En Cabos E Sist S Do B isolador polimérico modular para instalação em toda a extensão de redes aéreas primárias de distribuição de energia
KR20110068420A (ko) * 2009-12-16 2011-06-22 (주)디티알 폴리머 핀 애자 및 폴리머 핀 애자의 제조 방법
CN102074322B (zh) * 2010-12-22 2013-05-15 成都金和工贸有限公司 一种支撑绝缘子
CA3176424A1 (en) * 2022-09-22 2024-03-22 Rajkumar Padmawar Moisture shedding electrical insulator for power and transmission lines

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3014600A1 (de) * 1980-04-16 1981-10-22 Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart Anschlussarmatur fuer einen isolatorstab aus glasfaserverstaerktem kunststoff
US5147984A (en) * 1990-12-04 1992-09-15 Raychem Corporation Cap and pin insulator
FR2680041A1 (fr) * 1991-07-31 1993-02-05 Saint Gobain Emballage Piece dielectrique en verre pour isolateur electrique.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576938A (en) * 1969-11-07 1971-05-04 Gen Electric Electrical insulator with polymer-containing joint between the porcelain and the hardware
US3797104A (en) * 1972-07-13 1974-03-19 W Pote Flexible coaxial cable and method of making same
PL122159B1 (en) * 1979-09-15 1982-06-30 Inst Elektrotechniki High tension overhead-line instulator of plastic materialx and method of manufacturing the samerytykh ustanovok i sposob izgotovlenija plastmassovogo izoljatora vysokogo naprjazhenija dlja otkrytykh ustanovok
FR2499302A1 (fr) * 1981-02-05 1982-08-06 Ceraver Isolateur en matiere organique
FR2657721B1 (fr) * 1990-01-26 1992-05-15 Dervaux Ets Isolateur composite et son procede de fabrication.
US5830405A (en) * 1993-09-03 1998-11-03 Raychem Corporation Molding methods, track resistant silicone elastomer compositions and improved molded parts with better arcing, flashover and pollution resistance
FR2739720B1 (fr) * 1995-10-04 1997-12-05 Schneider Electric Sa Procede de fabrication d'un isolateur et isolateur realise selon ce procede
US5945636A (en) * 1996-04-22 1999-08-31 Hubbell Incorporated Electrical insulators with mechanical core and dielectric sheath
US5902963A (en) * 1996-09-18 1999-05-11 Schneider Electric High voltage insulator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3014600A1 (de) * 1980-04-16 1981-10-22 Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart Anschlussarmatur fuer einen isolatorstab aus glasfaserverstaerktem kunststoff
US5147984A (en) * 1990-12-04 1992-09-15 Raychem Corporation Cap and pin insulator
FR2680041A1 (fr) * 1991-07-31 1993-02-05 Saint Gobain Emballage Piece dielectrique en verre pour isolateur electrique.

Also Published As

Publication number Publication date
US20020020938A1 (en) 2002-02-21
AR030077A1 (es) 2003-08-13
CN1222955C (zh) 2005-10-12
ZA200106249B (en) 2002-07-25
CA2354654A1 (fr) 2002-02-01
EP1178496B1 (de) 2006-04-26
US6485598B2 (en) 2002-11-26
NZ513288A (en) 2003-01-31
CN1368742A (zh) 2002-09-11
FR2812754A1 (fr) 2002-02-08
BR0103049A (pt) 2002-04-02
JP2002093259A (ja) 2002-03-29
FR2812754B1 (fr) 2002-09-20
AU772038B2 (en) 2004-04-08
AU5594101A (en) 2002-02-07
ES2260180T3 (es) 2006-11-01

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