EP0887810B1 - Metal fitting for composite insulator - Google Patents
Metal fitting for composite insulator Download PDFInfo
- 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
Links
- 239000012212 insulator Substances 0.000 title claims abstract description 24
- 239000002131 composite material Substances 0.000 title claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 title abstract description 6
- 239000002184 metal Substances 0.000 title abstract description 6
- 239000000615 nonconductor Substances 0.000 claims abstract description 15
- 239000000853 adhesive Substances 0.000 claims abstract description 6
- 230000001070 adhesive effect Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 5
- 230000008961 swelling Effects 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- 239000003292 glue Substances 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000009730 filament winding Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Images
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.
Landscapes
- Insulating Bodies (AREA)
- Insulators (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Supports For Pipes And Cables (AREA)
- Graft Or Block Polymers (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
L'invention concerne la fixation de ferrures sur les extrémités d'un tube en matériau composite (fibres de verre/époxy) et plus particulièrement sur les extrémités d'un fût creux d'isolateur électrique à structure composite. Une telle ferrure comprend un corps métallique, par exemple en un alliage d'aluminium, ayant un alésage de forme généralement cylindrique formant un manchon dans lequel est insérée et collée une extrémité du fût de l'isolateur électrique. Elle sert de moyen, d'ancrage pour l'isolateur électrique: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. Such 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:
On a constaté avec ce genre d'isolateurs, que lorsqu'ils sont utilisés à des températures relativement élevées, c'est-à-dire au dessus de 60°C, la colle ou la résine qui sert à la fixation de la ferrure sur l'extrémité du fût flue et perd ses caractéristiques mécaniques, en particulier sa tenue à la traction. Par conséquent, la ferrure peut se désolidariser du fût de l'isolateur et être projetée à grande vitesse ce qui est dangereux.It has been found with this kind of insulators, that when used at relatively high temperatures, i.e. above 60 ° C, the glue or the resin which is used to fix the fitting on the end of the flue barrel and loses its mechanical characteristics, in particular its tensile strength. Through Consequently, the fitting can separate from the barrel of the insulator and be projected at high speed which is dangerous.
Le problème de la solidité de la fixation d'une ferrure sur un support d'isolateur a déjà été traité dans l'art antérieur mais pour des isolateurs dont le support est un barreau plein à la placé du fût creux évoqué ci-dessus. Ceci a aboutit à la conception de ferrures avec un alésage de forme tronconique comme divulgué dans les documents de brevet japonais N° JP8036925 et N° JP8036927.The problem of the solidity of the fixing of a fitting on a support of insulator has already been treated in the prior art but for insulators whose support is a solid bar in place of the hollow barrel mentioned above. This has results in the design of fittings with a tapered bore as disclosed in Japanese patent documents No. JP8036925 and No. JP8036927.
Les alésages présentés dans ces documents sont de forme strictement tronconique, l'espace entre la paroi d'un alésage et un barreau d'isolateur est occupé par une colle. Ce type d'alésage n'est toutefois pas optimal pour limiter les contraintes de cisaillement dans la colle et ne permet pas d'écarter le risque de projection de la ferrure si le barreau formant support est remplacé par un fût creux.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.
Il est d'autre part connu du brevet FR 2 357 993 un capot de fermeture pour isolateur électrique tubulaire, comportant un alésage de forme approximativement tronconique s'évasant vers le fond. A son extrémité ouverte, cet alésage présente un diamètre sensiblement supérieur à celui du fût de l'isolateur, de sorte qu'un espace ouvert est ménagé entre l'alésage et le fût de façon à pouvoir couler un ciment destiné à sceller le capot sur ce fût. L'isolateur est destiné à être rempli d'une mousse rigide de résine synthétique, et le capot n'est pas conçu pour procurer une fixation et une étanchéité satisfaisantes si l'isolateur devait contenir un gaz sous pression.On the other hand, it is known from patent FR 2 357 993 a closure cover for an insulator. tubular electric, having an approximately frustoconical widening bore towards the bottom. At its open end, this bore has a diameter substantially greater than that of the insulator barrel, so that an open space is provided between the bore and the barrel of so as to be able to pour a cement intended to seal the cover on this barrel. The insulator is intended to be filled with rigid synthetic resin foam, and the cover is not designed to provide satisfactory fixing and sealing if the insulator were to contain a pressurized gas.
Il est enfin connu du brevet DE 1 092 976 une ferrure vissée indirectement à l'extrémité
d'un fût d'un isolateur en porcelaine. L'alésage de cette ferrure comporte des stries pour le
vissage sur une pièce intermédiaire, laquelle comporte une zone élastique et est vissée
directement sur l'extrémité du fût. Ce type de fermeture ne peut procurer une étanchéité
satisfaisante si la porcelaine du fût est remplacée par un matériau composite, en particulier
lorsque la pression du gaz diélectrique dans le fût est importante.Finally, it is known from
Le but de l'invention est de proposer une solution pour obtenir une fixation améliorée d'une ferrure sur un fût creux d'isolateur électrique, en particulier une fixation qui procure une bonne étanchéité et qui ne présente pas de risque de désolidarisation à des températures d'utilisation de l'isolateur supérieures à 60°C.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.
A cet effet, l'invention a pour objet une ferrure pour la fermeture d'une extrémité d'un fût creux d'un isolateur électrique à structure composite, cette ferrure comprenant un corps dans lequel est ménagé un alésage qui forme un manchon pour ledit fût et qui comporte une ouverture et un fond, le diamètre de ladite ouverture étant inférieur au diamètre dudit fond, la paroi dudit alésage étant de forme approximativement tronconique pour laisser un espace qui présente un écart variable entre cette paroi et une surface cylindrique correspondant à la surface extérieure dudit fût, caractérisée en ce que ladite paroi présente un renflement annulaire vers l'intérieur dudit alésage tel que ledit écart augmente continûment de façon non linéaire depuis ladite ouverture vers ledit fond, la valeur maximale R de cet écart dépendant de la hauteur H dudit alésage suivant la relation 0,2%<R/H<20%.To this end, 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%.
Avantageusement, cette ferrure peut être frettée autour d'une extrémité du fût de l'isolateur par un rétreint thermique, et la fixation de la ferrure sur l'extrémité du fût peut être renforcée avec de la colle.Advantageously, 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.
L'invention a aussi pour objet un procédé de fermeture d'un isolateur électrique par frettage à l'aide d'une telle ferrure , dans lequel le fût de l'isolateur est refroidi et la ferrure est chauffée à une température supérieure à 60°C. 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.
Un exemple de réalisation de l'invention est décrit en détail ci-après en relation avec la figure unique qui montre en coupe partielle longitudinale, une ferrure selon l'invention fixée sur l'extrémité d'un fût d'isolateur composite. An exemplary embodiment of the invention is described in detail below in relationship with the single figure which shows in partial longitudinal section, a fitting according to the invention fixed on the end of a composite insulator barrel.
Sur cette figure, la ferrure 1 est montrée suivant une demi-coupe axiale
longitudinale. Cette ferrure est destinée à être fixée sur une extrémité d'un fût
creux en matériau composite d'un isolateur électrique composite. Elle comprend
un corps métallique 2, par exemple en un alliage d'aluminium, dans lequel est
usiné un alésage 3. L'alésage 3 forme un manchon destiné à recevoir l'extrémité
du fût qui s'étend suivant l'axe longitudinal 4 du fût.In this figure, the
L'alésage 3 présente une paroi 5 de forme sensiblement tronconique qui
s'évase en allant de l'ouverture de l'alésage indiquée par O vers le fonds de
l'alésage indiquée par F.The bore 3 has a
Selon l'invention, cette paroi 5 présente en outre un renflement annulaire
dirigé vers l'intérieur de l'alésage. Comme montré sur cette figure, la surface
complexe de la paroi 5 de l'alésage se situe en fait entre une surface TR
strictement tronconique définie par la génératrice passant par les points A et B et
une surface strictement cylindrique CO définie par la génératrice passant par les
points A et C, cette surface cylindrique correspondant à la surface extérieure
cylindrique du fût 6 de l'isolateur.According to the invention, this
Par rapport à une paroi strictement cylindrique, la paroi de l'alésage de la ferrure selon l'invention procure une résistance accrue à l'arrachement en raison de sa forme tronconique. En outre, le renflement annulaire de la paroi de l'alésage, permet par rapport à une paroi strictement tronconique, d'avoir un assemblage moins contraint et une meilleure répartition des sollicitations sur toute la surface de l'interface ferrure/fût.Compared to a strictly cylindrical wall, the wall of the bore of the fitting according to the invention provides increased pull-out resistance due to of its frustoconical shape. In addition, 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.
La surface complexe de la paroi de l'alésage 3 est déterminée suivant une méthode de calcul par éléments finis. Une telle méthode est implémentée par exemple dans le logiciel 'ANSYS', version 5.2 vendu par la société ANSYS Inc. Avec ce logiciel, on réalise une première modélisation du contact sans contrainte d'un anneau métallique modèle monté sur la partie basse d'un tube modèle ayant les caractéristiques mécaniques du fût de l'isolateur. Les températures affectées à l'anneau (T1) et au tube (T2) sont différentes et correspondent aux températures utilisées lors de l'opération de frettage de la ferrure sur le fût de l'isolateur. En particulier T1 est supérieure à 60°C et T2 est inférieure ou égale à la température ambiante. Par calcul; la température des deux pièces est amenée à une température T3 au moins égale à la température d'utilisation de l'isolateur concerné. La température T3 étant inférieure à la température T1, l'anneau modèle se resserre sur le tube modèle ce qui engendre une certaine déformation de la partie basse de celui-ci. La forme prise par le tube modèle dans sa partie basse est alors exploitée pour définir par modélisation la surface tronconique renflée de l'alésage de la ferrure telle qu'à toute température inférieure ou égale à T3, il existe une contrainte de compression à l'interface tube/ferrure uniformément répartie le long de cette interface.The complex surface of the wall of bore 3 is determined according to a finite element calculation method. Such a method is implemented for example in the software 'ANSYS', version 5.2 sold by the company ANSYS Inc. With this software, we perform a first modeling of the contact without stress of a model metal ring mounted on the lower part of a tube model with the mechanical characteristics of the insulator drum. 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. In particular T1 is greater than 60 ° C and T2 is less than or equal to room temperature. By calculation; the temperature of two pieces is brought to a temperature T3 at least equal to the temperature of use of the insulator concerned. 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.
On peut remarquer que cette surface complexe de l'alésage de la ferrure vérifie les caractéristiques suivantes en se référant à la figure :
- l'écart δ entre la surface CO et la surface S de la paroi de l'alésge 3 augmente de façon non linéaire lorsqu'on se déplace du point A vers le point B,
- le point A est en retrait du point B par rapport à l'axe 4 d'une valeur R qui dépend de la hauteur H de l'alésage suivant la relation 0,2%<R/H<20%.
- the difference δ between the surface CO and the surface S of the wall of the bore 3 increases in a non-linear fashion when one moves from point A to point B,
- point A is set back from point B with respect to axis 4 by a value R which depends on the height H of the bore according to the relationship 0.2% <R / H <20%.
La fabrication d'un isolateur électrique composite avec une ferrure selon
l'invention s'effectue de la façon suivante. Le fût creux est réalisé par exemple
par une technique connue d'enroulement filamentaire de fibres de verre
imprégnées de résine. L'enroulement filamentaire est tronçonné et les extrémités
du tronçon sont usinées pour obtenir un fût 6 d'isolateur dont les extrémités
présentent un certain diamètre extérieur. Chaque ferrure 1 est réalisée par
moulage, usinage ou analogue de telle façon qu'elle présente un alésage 3 avec
une surface complexe renflée comme indiquée ci-dessus, l'ouverture de
l'alésage étant toutefois dimensionnée pour avoir un diamètre sensiblement plus
petit que le diamètre extérieur de l'extrémité du fût sur laquelle doit être fixée la
ferrure.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
La ferrure est chauffée jusqu'à ce que l'ouverture de l'alésage de celle-ci soit suffisamment dilatée pour permettre l'insertion de l'extrémité du fût. Avant d'être insérée dans la ferrure, l'extrémité du fût est encollée. En se refroidissant à la température ambiante, la ferrure se resserre sur l'extrémité du fût. La ferrure est donc frettée sur le fût par un rétreint thermique.The fitting is heated until the opening of the bore thereof is sufficiently dilated to allow insertion of the end of the barrel. Before to be inserted into the fitting, the end of the barrel is glued. By cooling to at room temperature, the fitting tightens on the end of the barrel. The fitting is therefore shrunk onto the barrel by thermal shrinkage.
En variante, on peut prévoir de rétreindré tharmiquement le fût de l'isolateur avant de l'insérer dans la ferrure, par exemple en le plongeant dans l'azote liquide. On peut aussi combiner un rétreint thermique du fût de l'isolateur et une dilatation de l'alésage de la ferrure avant leur assemblage.As a variant, it is possible to provide for the drastic shrinking of the barrel of the insulator before inserting it into the fitting, for example by immersing it in liquid nitrogen. It is also possible to combine a thermal shrinkage of the barrel of the insulator and a dilation of the bore of the fitting before their assembly.
Comme déjà indiqué plus haut, on obtient une répartition homogène des sollicitations le long: de l'interface ferrure/fût et seulement une fine couche de colle subsiste au niveau de cette interface ce qui contribue à limiter les contraintes de cisaillement dans la colle.As already indicated above, a homogeneous distribution of the stresses along: the hardware / shaft interface and only a thin layer of glue remains at this interface which helps limit the shear stresses in the glue.
Claims (6)
- An end fitting designed to be fixed on one end of a hollow shank (6) of an electrical insulator of composite structure, the end fitting comprising a body (2) in which a bore (3) is provided which forms a sleeve for said shank, the wall (S) of said bore being approximately frustoconical in shape in order to leave a gap which presents a varying offset (δ) between said wall and a cylindrical surface (CO) corresponding to the outside surface of said shank, the end fitting being characterized in that said wall (S) has an annular swelling directed towards the inside of said bore (3) so that said offset (δ) increases continuously in non-linear manner, the maximum value (R) of said offset depending on the height (H) of said bore and satisfies the relationship 0.2% < R/H < 20%.
- An electrical insulator of composite structure, comprising a hollow, shank (6) of composite structure having at least one end that includes an end fitting according to claim 1.
- An electrical insulator according to claim 2, in which said end fitting is engaged as an interference fit around one end of said shank (6) by heat shrinking.
- An electrical insulator according to claim 2 or claim 3, in which the fixing of said end fitting on the end of the shank (6) is reinforced with adhesive.
- An electrical insulator according to claim 4, in which the gap between the wall (S) of the bore and the outside surface of said shank is entirely occupied by adhesive.
- A method of fixing an end fitting according to claim 1 on an electrical insulator according to claim 3, in which method the shank (6) of the insulator is cooled and said end fitting is heated to a temperature that is greater than 60°C for the operation of engaging said end fitting as an interference fit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9708009 | 1997-06-26 | ||
| FR9708009A FR2765385B1 (en) | 1997-06-26 | 1997-06-26 | COMPOSITE INSULATOR HANGER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0887810A1 EP0887810A1 (en) | 1998-12-30 |
| EP0887810B1 true EP0887810B1 (en) | 2002-07-31 |
Family
ID=9508474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98401517A Expired - Lifetime EP0887810B1 (en) | 1997-06-26 | 1998-06-22 | Metal fitting for composite insulator |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6064010A (en) |
| EP (1) | EP0887810B1 (en) |
| CN (1) | CN1208939A (en) |
| AT (1) | ATE221692T1 (en) |
| DE (1) | DE69806862T2 (en) |
| ES (1) | ES2179435T3 (en) |
| FR (1) | FR2765385B1 (en) |
Families Citing this family (5)
| 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 (en) * | 2004-07-09 | 2007-10-03 | 上海Mwb互感器有限公司 | Method for mfg. composite isolators and mould thereof |
| JP4376174B2 (en) * | 2004-12-01 | 2009-12-02 | 日本碍子株式会社 | Polymer SP insulator |
| CN105119033B (en) * | 2015-09-10 | 2016-11-09 | 四川九洲电器集团有限责任公司 | A kind of squeezable waveguide and signal transmission system |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1092976B (en) * | 1959-10-13 | 1960-11-17 | Licentia Gmbh | High-voltage support insulator made of ceramic material with a cap fitting |
| BE759109A (en) * | 1969-12-31 | 1971-04-30 | Joslyn Mfg And Supply Cy | END FITTINGS FOR FIBERGLASS RODS MUST WITHSTAND HIGH TENSILE LOADS |
| 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 (en) * | 1976-07-09 | 1978-02-03 | Ceraver | TUBULAR ELECTRICAL INSULATOR, AND METHOD OF MANUFACTURING THE SAME |
| FR2459398A1 (en) * | 1979-06-15 | 1981-01-09 | Viennot Pierre | METHOD FOR LOADING RODS IN INSULATING MATERIALS IN CONNECTING FIXTURES AND DEVICE FOR CARRYING OUT SAME |
| 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 (en) * | 1994-06-17 | 1995-12-21 | Hoechst Ceram Tec Ag | High voltage ceramic insulator |
| DE19503324A1 (en) * | 1995-02-02 | 1996-08-08 | Hoechst Ceram Tec Ag | Insulator with putty joint and process for its manufacture |
| JP2611689B2 (en) * | 1995-06-29 | 1997-05-21 | 日立化成工業株式会社 | Composite insulator |
| JP2616493B2 (en) * | 1995-06-29 | 1997-06-04 | 日立化成工業株式会社 | Composite insulator |
-
1997
- 1997-06-26 FR FR9708009A patent/FR2765385B1/en not_active Expired - Fee Related
-
1998
- 1998-06-22 ES ES98401517T patent/ES2179435T3/en not_active Expired - Lifetime
- 1998-06-22 AT AT98401517T patent/ATE221692T1/en not_active IP Right Cessation
- 1998-06-22 DE DE69806862T patent/DE69806862T2/en not_active Expired - Fee Related
- 1998-06-22 EP EP98401517A patent/EP0887810B1/en not_active Expired - Lifetime
- 1998-06-23 US US09/102,656 patent/US6064010A/en not_active Expired - Fee Related
- 1998-06-26 CN CN98115171.XA patent/CN1208939A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| ES2179435T3 (en) | 2003-01-16 |
| FR2765385B1 (en) | 2003-12-05 |
| FR2765385A1 (en) | 1998-12-31 |
| DE69806862D1 (en) | 2002-09-05 |
| ATE221692T1 (en) | 2002-08-15 |
| US6064010A (en) | 2000-05-16 |
| CN1208939A (en) | 1999-02-24 |
| DE69806862T2 (en) | 2003-03-20 |
| EP0887810A1 (en) | 1998-12-30 |
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