EP0264684B1 - Composite insulator with an insulating covering moulded onto it - Google Patents
Composite insulator with an insulating covering moulded onto it Download PDFInfo
- Publication number
- EP0264684B1 EP0264684B1 EP87114361A EP87114361A EP0264684B1 EP 0264684 B1 EP0264684 B1 EP 0264684B1 EP 87114361 A EP87114361 A EP 87114361A EP 87114361 A EP87114361 A EP 87114361A EP 0264684 B1 EP0264684 B1 EP 0264684B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fitting
- fittings
- sleeve
- rod
- composite insulator
- 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
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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
- H01B17/32—Single insulators consisting of two or more dissimilar insulating bodies
- H01B17/325—Single insulators consisting of two or more dissimilar insulating bodies comprising a fibre-reinforced insulating core member
-
- 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 of manufacturing a composite insulator.
- a central rod made of fibers agglomerated by a synthetic resin, the ends of which are respectively secured in blind cavities presented by two metal anchoring fittings, has its side wall coated by overmolding with a coating of fins.
- the fin coating also extends over part of the lateral surface of the metal fitting.
- French patent FR-A-2 541 501 also describes a form of metal fitting having an internal cylindrical housing, the inlet of which is provided with a bead defining the "inlet plane" of the fitting; the insulator creepage line is defined between the "entry planes" of the end fittings.
- the entry of the fitting remains a critical zone, because it is the seat of power arcs which are likely to deteriorate the anchoring of the rod and the sealing.
- British patent GB-A-2 104 171 shows another type of connection between the fittings and the rod.
- these fittings have the form of solid cylinders.
- the end in the shape of a full cylinder of the corresponding fitting is placed opposite one of the two ends of the rod in a metal sleeve; a sleeving is then carried out.
- the object of the present invention is to produce an insulating coating on an insulator of the type of that of patent GB-A-2 104 171 in order to prevent any trace humidity can reach the rod and quickly deteriorate this insulator.
- double internal anchoring This gives an isolator called "double internal anchoring" which has many advantages.
- the quality of the covering-fittings connection is excellent; the anchoring itself is very well protected from the point of view of sealing.
- the area where a potential arc could occur is far from the anchorage and is on a non-critical part of the fitting.
- the creepage distance of the insulator is lengthened compared to that of the usual insulators.
- any form of fitting can be provided: its hooking end can be in the form of a button, clevis, tenon, ball joint housing, eyelet, Y clevis in particular.
- the insulator 30 in FIG. 1 comprises a central rod 32, and two end fittings; the fitting 31 illustrated has a cylindrical end 33 having the same diameter as the rod 32, and the other end in the form of a button 35.
- the attachment is effected by introduction of the ends of the rod 32 and the fitting into a ductile metal tube , followed by sleeving, for example according to the method described in English patent GB-A-2,104,171.
- the finned coating 36 of elastomer completely covers the sleeve 34, as well as a large part of the side wall 37 of the fitting 31, so as to leave only an area necessary for the attachment of the button 35.
- the covering 36 ends in a fin 38.
- This embodiment is particularly advantageous because it is very economical.
- the metal part 31 has a very simple shape: the sleeve 34 can be a steel tube which is commonly found on the market and which does not need to be galvanized, since it is extremely well protected by the coating. 36.
- the insulator 40 in FIG. 2 is very close to that of the insulator 30 in FIG. 1. Identical elements have been indicated by the same reference numbers.
- the coating 46 is distinct from the coating 36 because it ends in a sleeve 48.
- the cylindrical end of the fitting 51 has a diameter smaller than that of the rod 52.
- the sleeving can still be carried out using a metal tube 54.
- the covering 56 ends with a fin 58, while, in FIG. 4, the covering 66 of the insulator 60 ends with a sleeve 68.
- the diameter of the rod 72 which is less than that of the cylindrical end of the fitting 71; the sleeving is carried out using a tube 74 and the elastomer coating 76 ends with a fin 78, while in the insulator 80 of FIG. 6 the coating 86 ends with a sleeve 88.
- the line of flight of the insulator is lengthened compared to the provisions of the prior art, in particular by the fact that one can provide additional fins; the electrical performance of the insulator is improved.
- the power arcs which risked damaging the anchoring in the previous arrangements, carry over into the extreme outer zone of the fittings, which does not present any significant drawback.
- These fittings are made of a material chosen in particular from steel, cast iron, bronze, aluminum.
- the invention applies for example to suspension insulators for voltages which can go beyond 735kV.
Landscapes
- Insulators (AREA)
- Insulating Bodies (AREA)
- Gloves (AREA)
- Glass Compositions (AREA)
- Organic Insulating Materials (AREA)
Abstract
Description
La présente invention concerne un procédé de fabrication d'un isolateur composite.The present invention relates to a method of manufacturing a composite insulator.
Un tel procédé est décrit notamment dans le brevet français FR-A-2 506 997 et la demande de brevet allemand DE-A-1 932 949. Un jonc central en fibres agglomérées par une résine synthétique, dont les extrémités sont solidarisées respectivement dans des cavités borgnes présentées par deux ferrures métalliques d'ancrage, a sa paroi latérale revêtue par surmoulage d'un revêtement à ailettes.Such a process is described in particular in French patent FR-A-2 506 997 and German patent application DE-A-1 932 949. A central rod made of fibers agglomerated by a synthetic resin, the ends of which are respectively secured in blind cavities presented by two metal anchoring fittings, has its side wall coated by overmolding with a coating of fins.
Dans le cas de l'isolateur composite divulgué par le brevet allemand DE-A- 1 932 949, le revêtement à ailettes s'étend également sur une partie de la surface latérale de la ferrure métallique.In the case of the composite insulator disclosed by German patent DE-A-1,932,949, the fin coating also extends over part of the lateral surface of the metal fitting.
Le brevet français FR-A-2 541 501 décrit par ailleurs une forme de ferrure métallique présentant un logement cylindrique interne dont l'entrée est munie d'un bourrelet définissant le "plan d'entrée" de la ferrure ; la ligne de fuite de l'isolateur se définit entre les "plans d'entrée" des ferrures d'extrémité. L'entrée de la ferrure demeure une zone critique, car elle est le siège d'arcs de puissance qui sont susceptibles de détériorer l'ancrage du jonc et l'étanchéité.French patent FR-A-2 541 501 also describes a form of metal fitting having an internal cylindrical housing, the inlet of which is provided with a bead defining the "inlet plane" of the fitting; the insulator creepage line is defined between the "entry planes" of the end fittings. The entry of the fitting remains a critical zone, because it is the seat of power arcs which are likely to deteriorate the anchoring of the rod and the sealing.
Le brevet anglais GB-A-2 104 171 montre un autre type de liaison entre les ferrures et le jonc. Dans ce brevet ces ferrures ont la forme de cylindres pleins. Pour chaque extrémité de l'isolateur, on dispose l'extrémité en forme de cylindre plein de la ferrure correspondante en face d'une des deux extrémités du jonc dans un manchon métallique ; on effectue ensuite un manchonnage.British patent GB-A-2 104 171 shows another type of connection between the fittings and the rod. In this patent, these fittings have the form of solid cylinders. For each end of the insulator, the end in the shape of a full cylinder of the corresponding fitting is placed opposite one of the two ends of the rod in a metal sleeve; a sleeving is then carried out.
Le but de la présente invention est de réaliser un revêtement isolant sur un isolateur du type de celui du brevet GB-A-2 104 171 afin d'éviter que toute trace d'humidité puisse atteindre le jonc et détériorer très rapidement cet isolateur.The object of the present invention is to produce an insulating coating on an insulator of the type of that of patent GB-A-2 104 171 in order to prevent any trace humidity can reach the rod and quickly deteriorate this insulator.
La présente invention a pour objet un procédé de fabrication d'un isolateur composite comportant un jonc central en fibres agglomérées par une résine synthétique, et deux ferrures extrêmes présentant chacune une extrémité en forme de cylindre plein, procédé selon lequel pour chaque ferrure on dispose l'extrémité en forme de cylindre plein de la ferrure en face d'une des deux extrémités dudit jonc dans un manchon métallique et on effectue ensuite un manchonnage, procédé caractérisé par le fait que:
- préalablement audit manchonnage, on dispose lesdites extrémités dudit jonc et de ladite ferrure correspondant bout à bout dans ledit manchon,
- après ledit manchonnage, on applique un agent d'adhérisation élastomère-métal sur la face latérale de chaque manchon et la face latérale de ladite ferrure correspondante, sauf sur une zone de cette ferrure nécessaire à l'accrochage de l'isolateur,
- et on effectue dans un moule sur ledit jonc et les manchons, et sur les parties des ferrures enduites par ledit agent d'adhérisation, une injection sous une pression de 50 à 60 bars d'un élastomère, de manière à obtenir un revêtement isolant à ailettes.
- prior to said sleeving, said ends of said rod and of said corresponding fitting are placed end to end in said sleeve,
- after said sleeving, an elastomer-metal bonding agent is applied to the lateral face of each sleeve and the lateral face of said corresponding fitting, except on an area of this fitting necessary for the attachment of the insulator,
- and is carried out in a mold on said rod and the sleeves, and on the parts of the fittings coated with said bonding agent, an injection under a pressure of 50 to 60 bars of an elastomer, so as to obtain an insulating coating with fins.
On obtient ainsi un isolateur dit "à double ancrage interne" qui présente de nombreux avantages.
La qualité de la liaison revêtement-ferrures est excellente; l'ancrage proprement dit est très bien protégé du point de vue de l'étanchéité. En outre la zone où pourrait se produire un arc en puissance est éloignée de l'ancrage et se trouve sur une partie non critique de la ferrure. De plus, pour une longueur d'isolateur donnée, la ligne de fuite de l'isolateur est allongée par rapport à celle des isolateurs habituels.This gives an isolator called "double internal anchoring" which has many advantages.
The quality of the covering-fittings connection is excellent; the anchoring itself is very well protected from the point of view of sealing. In addition, the area where a potential arc could occur is far from the anchorage and is on a non-critical part of the fitting. In addition, for a given length of insulator, the creepage distance of the insulator is lengthened compared to that of the usual insulators.
Toute forme de ferrure peut être prévue : son extrémité d'accrochage peut être en forme de bouton, chape, tenon, logement de rotule, oeillet, chape Y notamment.Any form of fitting can be provided: its hooking end can be in the form of a button, clevis, tenon, ball joint housing, eyelet, Y clevis in particular.
D'autres caractéristiques et avantages de la présente invention apparaîtront au cours de la description suivante de divers modes de réalisation donnés à titre d'exemples non limitatifs. Dans le dessin annexé :
- Les figures 1 et 2 sont deux vues partielles en coupe d'isolateurs de suspension obtenus par la mise en oeuvre du procédé selon l'invention.
- Les figures 3 et 4 sont des variantes des figures 1 et 2, le diamètre du jonc étant supérieur à celui de la ferrure.
- Les figures 5 et 6 sont des variantes des figures 1 et 2, le diamètre du jonc étant inférieur à celui de la ferrure.
- Figures 1 and 2 are two partial sectional views of suspension insulators obtained by the implementation of the method according to the invention.
- Figures 3 and 4 are variants of Figures 1 and 2, the diameter of the rod being greater than that of the fitting.
- Figures 5 and 6 are variants of Figures 1 and 2, the diameter of the rod being less than that of the fitting.
L'isolateur 30 de la figure 1 comporte un jonc central 32, et deux ferrures extrêmes ; la ferrure 31 illustrée a une extrémité cylindrique 33 présentant le même diamètre que le jonc 32, et l'autre extrémité en forme de bouton 35. La solidarisation est effectuée par introduction des extrémités du jonc 32 et de la ferrure dans un tube en métal ductile, suivie d'un manchonnage, par exemple selon le procédé décrit dans le brevet anglais GB-A-2 104 171. Le revêtement à ailettes 36 en élastomère recouvre entièrement le manchon 34, ainsi qu'une grande partie de la paroi latérale 37 de la ferrure 31, de manière à ne laisser qu'une zone nécessaire à l'accrochage du bouton 35. Le revêtement 36 se termine par une ailette 38.
Ce mode de réalisation est particulièrement avantageux, car très économique. La pièce métallique 31 a une forme très simple : le manchon 34 peut être un tube en acier que l'on trouve couramment dans le commerce et qui n'a pas besoin d'être galvanisé, puisqu'il est extrêmement bien protégé par le revêtement 36.The
This embodiment is particularly advantageous because it is very economical. The
Pour obtenir une adhérence parfaite entre la face latérale 37 de la ferrure 31, celle du manchon 34, et le revêtement en élastomère 36, il convient de nettoyer ces faces de manière connue en soi, et d'appliquer ensuite un agent d'adhérisation élastomère-métal. L'état de surface initial des faces métalliques n'est pas du tout critique, et la qualité de la liaison revêtement-ferrure est tout à fait étonnante : il faut appliquer une force supérieure à 10N/cm pour obtenir un début d'arrachement du revêtement de la surface de la ferrure. Ce résultat est inattendu car, pour arriver à réaliser un surmoulage efficace et combler tous les interstices afin d'obtenir l'étanchéité recherchée, il faut injecter l'élastomère sous une pression très élevée, de l'ordre de 50 à 60 bars. Or, il était à craindre que, sous l'effet d'une telle pression, le produit d'adhérisation élastomère-métal soit plus au moins endommagé et qu'il apparaisse des bulles entre les faces métalliques et son revêtement. Ce n'est pas le cas.To obtain perfect adhesion between the
L'isolateur 40 de la figure 2 est très voisin de celui de l'isolateur 30 de la figure 1. On a indiqué par les mêmes nombres de référence les éléments identiques. Le revêtement 46 est distinct du revêtement 36 car il se termine par un manchon 48.The
Dans l'isolateur 50 de la figure 3, on a une configuration voisine, mais l'extrémité cylindrique de la ferrure 51 a un diamètre inférieur à celui du jonc 52. Le manchonnage peut encore être effectué à l'aide d'un tube métallique 54. Le revêtement 56 se termine par une ailette 58, alors que, dans la figure 4, le revêtement 66 de l'isolateur 60 se termine par un manchon 68.In the
Dans l'isolateur 70 de la figure 5, c'est le diamètre du jonc 72 qui est inférieur à celui de l'extrémité cylindrique de la ferrure 71 ; le manchonnage est réalisé grâce à un tube 74 et le revêtement en élastomère 76 se termine par une ailette 78, alors que dans l'isolateur 80 de la figure 6 le revêtement 86 se termine par un manchon 88.In the
Bien entendu, l'invention n'est pas limitée aux exemples qui viennent d'être décrits. Les formes des ferrures peuvent être modifiées.Of course, the invention is not limited to the examples which have just been described. The shapes of the fittings can be changed.
Dans toutes les variantes, la ligne de fuite de l'isolateur est allongée par rapport aux dispositions de l'art antérieur, notamment par le fait que l'on peut prévoir des ailettes supplémentaires ; les performances électriques de l'isolateur en sont améliorées.
Par ailleurs, on a aussi considérablement allongé le chemin que doivent parcourir les gouttes d'humidité avant de parvenir au niveau de l'ancrage proprement dit.
De plus, les arcs de puissance, qui risquaient de détériorer l'ancrage dans les dispositions antérieures, se reportent dans la zone extérieure extrême des ferrures, ce qui ne présente pas d'inconvénient notable. Ces ferrures sont en un matériau choisi notamment parmi l'acier, la fonte, le bronze, l'aluminium.In all the variants, the line of flight of the insulator is lengthened compared to the provisions of the prior art, in particular by the fact that one can provide additional fins; the electrical performance of the insulator is improved.
In addition, we have also considerably lengthened the path that must be followed by the drops of moisture before reaching the level of the anchoring proper.
In addition, the power arcs, which risked damaging the anchoring in the previous arrangements, carry over into the extreme outer zone of the fittings, which does not present any significant drawback. These fittings are made of a material chosen in particular from steel, cast iron, bronze, aluminum.
L'invention s'applique par exemple aux isolateurs de suspension pour des tensions pouvant aller au-delà de 735kV.The invention applies for example to suspension insulators for voltages which can go beyond 735kV.
Claims (3)
- A method of manufacturing a composite insulator comprising: a central rod (32) of fibers agglomerated by a synthetic resin and two end fittings (31), each end fitting having an end (33) in the form of a solid cylinder, in which method the end (33) of each fitting (31) that is in the form of a solid cylinder is placed opposite one of the two ends of said rod (32) inside a metal sleeve (34), and sleeve coupling is then effected, the method being characterized by the fact that:- prior to said sleeve coupling, said ends of said rod and of said corresponding end fitting are disposed end-to-end inside said sleeve;- after said sleeve coupling, an elastomer-metal adhesive agent is applied on the lateral face of each sleeve and the lateral face of said corresponding end fitting, with the exception of the zone of said end fitting necessary for fastening the insulator; and- an elastomer is injected under a pressure of 50 to 60 bars into a mold on said rod and sleeves, and on the portions of the end fittings coated with said adhesive agent, in such a manner as to obtain an insulating fin coating.
- A method of manufacturing a composite insulator according to claim 1, characterized by the fact that the fastening zones (35) of said end-fittings (31) are of one of the following shapes: plate, peg, knob, fork, ball-receiving socket, and eyelet.
- A method of manufacturing a composite insulator according to claim 1 or 2, characterized by the fact that said end-fittings (31) are made of a material chosen from: steel, cast iron, bronze, and aluminum.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8613758 | 1986-10-02 | ||
| FR8613758A FR2604821B1 (en) | 1986-10-02 | 1986-10-02 | COMPOSITE INSULATOR WITH OVER-MOLDED INSULATING COATING |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0264684A1 EP0264684A1 (en) | 1988-04-27 |
| EP0264684B1 true EP0264684B1 (en) | 1995-01-04 |
Family
ID=9339491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87114361A Expired - Lifetime EP0264684B1 (en) | 1986-10-02 | 1987-10-01 | Composite insulator with an insulating covering moulded onto it |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0264684B1 (en) |
| JP (1) | JP2532889B2 (en) |
| AT (1) | ATE116761T1 (en) |
| AU (1) | AU601224B2 (en) |
| BR (1) | BR8705112A (en) |
| CA (1) | CA1291229C (en) |
| DE (1) | DE3750946T2 (en) |
| FR (1) | FR2604821B1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5233132A (en) * | 1986-10-02 | 1993-08-03 | Sediver Societe Europeenne D'isolateurs En | Composite insulator comprising a fiber-resin rod and an insulating coating molded thereover |
| GB8802841D0 (en) * | 1988-02-08 | 1988-03-09 | Raychem Ltd | High voltage insulator |
| FR2655471B1 (en) * | 1989-12-01 | 1992-02-21 | Sediver Ste Europ Isolateurs V | RIGID ELECTRICAL INSULATOR. |
| JP4460043B2 (en) * | 2001-07-23 | 2010-05-12 | 古河電気工業株式会社 | Optical fiber built-in insulator |
| FR2842644B1 (en) * | 2002-07-18 | 2004-08-20 | Sediver | MANUFACTURE OF A COMPOSITE INSULATOR BODY |
| JP4332718B2 (en) * | 2003-10-28 | 2009-09-16 | 株式会社日立製作所 | Insulator |
| EP2700079B1 (en) * | 2011-04-19 | 2018-10-24 | Sediver Société Europeenne d'Isolateurs en Verre et Composite | Method of manufacturing a composite insulator using a resin with high thermal performance |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2506997A1 (en) * | 1981-06-01 | 1982-12-03 | Ceraver | METHOD FOR MANUFACTURING AN ORGANIC INSULATOR |
| US4702873A (en) * | 1983-03-25 | 1987-10-27 | Ceraver, S.A. | Method of manufacturing a composite insulator |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1074367A (en) * | 1964-05-28 | 1967-07-05 | Gen Electric | Improvements in electrical insulator and method of making the same |
| DE1932949A1 (en) * | 1969-06-28 | 1971-01-07 | Bbc Brown Boveri & Cie | High-voltage composite insulator |
| FR2514546A1 (en) * | 1981-06-30 | 1983-04-15 | Ceraver | METHOD FOR REALIZING A CONNECTION BETWEEN A JONC AND A METALLIC FRAME IN A COMPOSITE INSULATOR AND COMPOSITE INSULATOR OBTAINED BY THIS METHOD |
| FR2541501B1 (en) * | 1983-02-22 | 1985-08-02 | Ceraver | PROCESS FOR FIXING A TAPERED METAL SLEEVE ON A JOINT OF COMPOSITE MATERIAL |
| CH662901A5 (en) * | 1983-03-09 | 1987-10-30 | Daetwyler Ag | METHOD FOR PRODUCING AN ELECTRIC PLASTIC INSULATOR AND PLASTIC INSULATOR PRODUCED BY THE METHOD. |
-
1986
- 1986-10-02 FR FR8613758A patent/FR2604821B1/en not_active Expired - Lifetime
-
1987
- 1987-10-01 EP EP87114361A patent/EP0264684B1/en not_active Expired - Lifetime
- 1987-10-01 CA CA000548354A patent/CA1291229C/en not_active Expired - Lifetime
- 1987-10-01 AT AT87114361T patent/ATE116761T1/en not_active IP Right Cessation
- 1987-10-01 DE DE3750946T patent/DE3750946T2/en not_active Expired - Lifetime
- 1987-10-01 BR BR8705112A patent/BR8705112A/en not_active IP Right Cessation
- 1987-10-01 AU AU79259/87A patent/AU601224B2/en not_active Ceased
- 1987-10-02 JP JP62249665A patent/JP2532889B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2506997A1 (en) * | 1981-06-01 | 1982-12-03 | Ceraver | METHOD FOR MANUFACTURING AN ORGANIC INSULATOR |
| US4702873A (en) * | 1983-03-25 | 1987-10-27 | Ceraver, S.A. | Method of manufacturing a composite insulator |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3750946T2 (en) | 1995-05-11 |
| AU7925987A (en) | 1988-04-14 |
| FR2604821A1 (en) | 1988-04-08 |
| BR8705112A (en) | 1988-05-24 |
| JPS6398921A (en) | 1988-04-30 |
| CA1291229C (en) | 1991-10-22 |
| ATE116761T1 (en) | 1995-01-15 |
| FR2604821B1 (en) | 1990-01-12 |
| DE3750946D1 (en) | 1995-02-16 |
| AU601224B2 (en) | 1990-09-06 |
| JP2532889B2 (en) | 1996-09-11 |
| EP0264684A1 (en) | 1988-04-27 |
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