EP0092548B1 - Isolateur composite - Google Patents

Isolateur composite Download PDF

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Publication number
EP0092548B1
EP0092548B1 EP81903257A EP81903257A EP0092548B1 EP 0092548 B1 EP0092548 B1 EP 0092548B1 EP 81903257 A EP81903257 A EP 81903257A EP 81903257 A EP81903257 A EP 81903257A EP 0092548 B1 EP0092548 B1 EP 0092548B1
Authority
EP
European Patent Office
Prior art keywords
rod
glass fibers
glass
plastic
binder resin
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
Application number
EP81903257A
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German (de)
English (en)
Other versions
EP0092548A1 (fr
Inventor
Martin Kuhl
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.)
Ceramtec GmbH
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Ceramtec GmbH
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Filing date
Publication date
Application filed by Ceramtec GmbH filed Critical Ceramtec GmbH
Priority to AT81903257T priority Critical patent/ATE16326T1/de
Publication of EP0092548A1 publication Critical patent/EP0092548A1/fr
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Publication of EP0092548B1 publication Critical patent/EP0092548B1/fr
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    • 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
    • H01B17/32—Single insulators consisting of two or more dissimilar insulating bodies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/08—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances quartz; glass; glass wool; slag wool; vitreous enamels
    • H01B3/087—Chemical composition of glass

Definitions

  • the invention relates to the use of glass fibers of a special composition in a composite insulator for high-voltage overhead lines, consisting of a glass fiber reinforced plastic rod, plastic shields arranged on the rod and fittings on the rod ends.
  • Such composite insulators, the z. B. are known from ES-OS-26 50 363, certain electrical requirements should meet.
  • the rod should be resistant to electrical breakdown.
  • the screens should be attached to the rod, which is also called a trunk, in such a way that no electrical breakdowns occur in the contact area.
  • the screens themselves should be dimensioned so thick that electrical breakdowns are avoided; They should also consist of a weather, UV and ozone resistant material that has a very high tracking resistance.
  • the glass fiber reinforced plastic rod In addition to the electrical strength, the glass fiber reinforced plastic rod must ensure considerable mechanical strength.
  • the mechanical strength results from the material composition, the type and location of the fibers and from the bond between glass fibers and plastic.
  • the object of the invention is to prevent the transverse fractures occurring in situ in composite insulators of the type described in the introduction.
  • the invention relates to a method for avoiding cross breaks in a composite insulator made of plastic for high-voltage overhead lines, the composite insulator consisting of a glass-fiber-reinforced plastic rod, the rod-encasing plastic shields and fittings at the rod ends and the glass fibers being arranged axially parallel, characterized in that glass fibers with the following composition can be used:
  • the glass fibers should expediently be processed with a thickness of 5 to 40 f.lm and in an endless length parallel to the axis of the rod.
  • a binder resin which is resistant to water attack is used as the binder resin surrounding the glass fibers. It is therefore preferable to use a binder resin that has no hydrolyzable molecules.
  • An epoxy resin of the glycidyl ether type is particularly suitable in this respect.
  • the insulator according to the invention In order to be able to manufacture the insulator according to the invention as economically as possible, it is useful moderate, use prefabricated insulating parts for the shield cover. In this way, isolators of any length can be produced; because the glass fiber reinforced plastic rod can also B. be produced in an endless drawing process. Rod surface and screens can be treated in a known manner with adhesives and - as usual - put together, for. B. by pouring, vulcanizing, gluing or the like.
  • the cause of the insulator cross breaks can be assumed to be the attack of aqueous nitric acid on boron-containing glass. If boron-containing glass is subjected to tensile stress and nitric acid at the same time, crack nuclei may form in the surface of the individual glass fibers, which spiral around the glass fiber. These crack nuclei are at least responsible for the transverse rod fracture in the laboratory. It is apparently not a chemical attack in the sense of swelling or dissolution, but rather a kind of stress corrosion cracking, which apparently does not occur with boron-free glass fibers or at higher strains or higher acid concentrations.
  • the test specimen shown in Fig. 1 consists of a glass fiber reinforced plastic rod 1 and the suspension fittings 2, to which a tensile force Z can be applied.
  • the z. B. can be a cut polyethylene bottle, which is pushed onto the rod and sealed with insulating tape.
  • FIG. 2 shows a functional relationship between tensile force Z and the breaking time of the test specimen according to FIG. 1.
  • Line 4 indicates the tensile force / time relationship (time that elapses until a rod breaks) of a glass fiber reinforced plastic rod that has no acid effect is exposed.
  • Line 5 illustrates the traction / time relationship when a 1 n HN0 3 (approximately 6.5% nitric acid) is filled into the acid reservoir 3 and glass fibers with a boron content are contained in the glass fiber reinforced plastic rod, calculated as B 2 0 3 is between 2 and 6%.
  • the break / time behavior of a glass fiber reinforced plastic rod, the glass fibers of which contain no boron is shown by line 6.
  • the diagram in FIG. 2 thus represents the break time difference between the glass fiber reinforced plastic rods of the previous composition (boron-containing glass) and those according to the invention ( boron-free glass).
  • Fig. 3 shows the composite insulator according to the invention. It consists of a glass fiber reinforced plastic rod 7, which consists of an epoxy resin of the glycidyl ether type and glass fibers from axially parallel endless fibers of the composition mentioned.
  • the insulator also consists of a shield cover made of individual prefabricated shields 8, which are pushed onto the rod and are mechanically and electrically connected to it.
  • Metallic suspension fittings 9 are also provided, which are attached to the ends of the composite insulator. This connection between rod 7 and. Armature 9 can be produced by known techniques such as wedging or pressing the rod.
  • shield cover Depending on the type of material of the shield cover, it can also be advantageous to prefabricate the shield cover and apply it in one operation.
  • Other materials for shielding sleeves can also require a complete encapsulation, pressing, extrusion or overmolding of the shielding sleeve in a one or more part form as the most economical solution.
  • silicone elastomers for the shield cover, which have already proven their worth as insulator materials.
  • ethylene-propylene-based elastomers may also be suitable as the screen material.
  • Other shielding materials such as cycloaliphatic epoxy resins or polytetrafluoroethylene can also be suitably used in the insulator according to the invention.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Insulators (AREA)
  • Insulating Bodies (AREA)
  • Organic Insulating Materials (AREA)

Claims (5)

1. Procédé pour éviter les ruptures transversales dans un isolateur composite en matière synthétique qui est notamment utilisé dans les lignes aériennes haute tension, l'isolateur composite étant constitué d'une tige en matière synthétique renforcée de fibres de verre (7), de capots en matière synthétique entourant la tige (8) et d'armatures (9) aux extrémités de la tige et les fibres de verre étant disposées parallèlement à l'axe, caractérisé en ce qu'on utilise des fibres de verre ayant la composition suivante :
Figure imgb0004
2. Procédé selon la revendication 1, caractérisé en ce qu'on utilise des fibres de verre continues d'une épaisseur de 5 à 40 µm.
3. Procédé selon les revendications 1 et/ou 2, caractérisé en ce qu'on utilise comme liant résineux enrobant les fibres de verre un liant résineux résistant à l'attaque par l'eau.
4. Procédé selon la revendication 3, caractérisé en ce qu'on utilise un liant résineux sans molécules hydrolysables.
5. Procédé selon les revendications 3 et/ou 4, caractérisé en ce qu'on utilise comme liant résineux une résine époxydique de type éther glycidi- que.
EP81903257A 1981-11-04 1981-11-04 Isolateur composite Expired EP0092548B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81903257T ATE16326T1 (de) 1981-11-04 1981-11-04 Verbundisolator.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1981/000175 WO1983001707A1 (fr) 1981-11-04 1981-11-04 Isolateur de liaison

Publications (2)

Publication Number Publication Date
EP0092548A1 EP0092548A1 (fr) 1983-11-02
EP0092548B1 true EP0092548B1 (fr) 1985-10-30

Family

ID=8164829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81903257A Expired EP0092548B1 (fr) 1981-11-04 1981-11-04 Isolateur composite

Country Status (7)

Country Link
EP (1) EP0092548B1 (fr)
JP (1) JPS58501528A (fr)
AU (1) AU7892482A (fr)
CA (1) CA1212436A (fr)
DE (1) DE3172780D1 (fr)
WO (1) WO1983001707A1 (fr)
ZA (1) ZA828103B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104992800A (zh) * 2015-06-18 2015-10-21 西安高强绝缘电气有限责任公司 一种多芯组合式复合绝缘子芯棒的制作方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5986216A (en) * 1997-12-05 1999-11-16 Hubbell Incorporated Reinforced insulator
CN100452248C (zh) * 2006-02-28 2009-01-14 陕西泰普瑞电工绝缘技术有限公司 无脱模剂复合绝缘子芯棒
AT507991B1 (de) * 2009-03-06 2012-01-15 Kuvag Kunststoffverarbeitungs Ges M B H Abspannisolator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2650363C2 (de) * 1976-11-03 1985-10-10 Rosenthal Technik Ag, 8672 Selb Verbundisolator für Hochspannungsfreiluft-Anwendungen
CH640973A5 (en) * 1978-06-02 1984-01-31 Micafil Ag Method for producing an insulating rod, which is resistant to tension, compression and torsion and has attachment fittings, and a device for carrying out the method
CH640664A5 (de) * 1979-11-05 1984-01-13 Sprecher & Schuh Ag Mechanisch beanspruchbares glasfaserverstaerktes kunststoff-isolierteil.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104992800A (zh) * 2015-06-18 2015-10-21 西安高强绝缘电气有限责任公司 一种多芯组合式复合绝缘子芯棒的制作方法

Also Published As

Publication number Publication date
AU7892482A (en) 1983-05-18
CA1212436A (fr) 1986-10-07
WO1983001707A1 (fr) 1983-05-11
JPS58501528A (ja) 1983-09-08
ZA828103B (en) 1984-02-29
JPH0145684B2 (fr) 1989-10-04
EP0092548A1 (fr) 1983-11-02
DE3172780D1 (en) 1985-12-05

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