EP2755212A1 - Medium-voltage insulator-substrate - Google Patents

Medium-voltage insulator-substrate Download PDF

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Publication number
EP2755212A1
EP2755212A1 EP14150351.6A EP14150351A EP2755212A1 EP 2755212 A1 EP2755212 A1 EP 2755212A1 EP 14150351 A EP14150351 A EP 14150351A EP 2755212 A1 EP2755212 A1 EP 2755212A1
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EP
European Patent Office
Prior art keywords
inserts
support insulator
ribs
insulator according
connecting means
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Granted
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EP14150351.6A
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German (de)
French (fr)
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EP2755212B1 (en
Inventor
Jean-François Tortorici
Didier Coq
Pierre Newinger
Florent Berardengo
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication of EP2755212A1 publication Critical patent/EP2755212A1/en
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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
    • H01B17/14—Supporting insulators
    • H01B17/16—Fastening of insulators to support, to conductor, or to adjoining insulator
    • 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
    • H01B17/24—Insulators apertured for fixing by nail, screw, wire, or bar, e.g. diabolo, bobbin

Definitions

  • the present invention relates to an insulator-support of electricity, of the kind intended to keep separate two electrically conductive parts at different potentials thus resisting at least a medium voltage.
  • the conductive parts may be an electrical conductor and its envelope, belonging to a confirmed atmosphere electrical apparatus, and they are attached to opposite ends of the insulator-support by screws or the like.
  • the insulator-support is provided with threaded metal inserts in which the screws are engaged, and these metal inserts are retained by being embedded in the insulating body constituting the main part of the insulator-support, by overmolding the body around these inserts.
  • the material used to mold the body of the insulator-support is generally epoxy resin or another thermosetting polymer, even if thermoplastic materials have also been proposed, particularly in the document WO 2011/023721 A .
  • the overmolding makes it difficult to separate the inserts and the body and thus compromises the possibility of easily recycling the insulator-support after its service. This disadvantage of difficult or impossible recycling is even more obvious with thermosetting materials.
  • the invention relates to an insulator-support of the kind mentioned, comprising a polymer body having two extreme regions, opposite in a direction of longitudinal extension of the body, comprising means for receiving ends of connecting means. from said body to said parts, characterized in that said receiving means comprise housings provided with a main opening established on a lateral side of the body, which joins said end regions, and delimited by a perforated partition wall of a rod means connecting and retaining a projecting end of the connecting means.
  • the connecting means usually include screws or bolts.
  • the housings may retain nuts, screw heads or insert inserts similar in shape to nuts, which are introduced through the side openings.
  • the screw rods pass through the days of the partitions and retain the projecting ends in the housings.
  • the invention would remain usable with any other connecting means of similar shape, rod terminated by a projecting end.
  • the insulator-support comprises metal inserts reported in the housing and receiving the fixing means, while constituting the projecting ends of these means. These metal inserts are then reported without overmolding and can be easily separated from the body of the insulator later. They can advantageously be associated with it by including pimples penetrating the corresponding holes of the end bulkheads of the body, in order to keep the inserts at a fixed position.
  • the inserts may also be threaded to be fixed to screws, or provided with fingerprints, connecting means.
  • the body may, in a general manner, advantageously be constructed with a ribbed structure in order to lighten it without significantly reducing its mechanical or dielectric strength, thanks to the reliefs and the continuity of the ribs, which make it possible to withstand the electric field and to lengthen the arc lines; moreover, this solution makes it possible to avoid the high thicknesses of thermoplastic material generating defects of the porosity type in the heart of the material.
  • It may also comprise longitudinal ribs joining the extreme regions, these ribs being parallel to a main direction of extension of the body. These ribs are advantageously radiating. They can branch off from different distances to a central axis of the body to prevent their general coalescence and a build-up of material in the center that can cause mold defects.
  • the body may also include transverse ribs perpendicular to the main direction of its extension, the main effects of which are to introduce a dielectric partition, to stiffen the longitudinal ribs when they exist and to lengthen the vanishing lines.
  • the body may even be entirely composed of these intersecting longitudinal and transverse ribs, at least between the extreme regions, where the dwellings will generally impose a slightly different constitution.
  • the ribs have an identical and constant thickness, to facilitate the manufacture of the body by molding.
  • Extreme areas may include a continuous peripheral wall except at the main openings of dwellings. These are advantageously angularly offset around the main direction of extension of the body, from one extreme region to another, again to reduce the risk of arcing.
  • the dwellings are delimited by bottom walls. It is advantageous that when inserts are provided, they are separated from these walls by constant play.
  • the insulator-support of the invention essentially comprises a body 1 of cylindrical or conical shape comprising two end regions 2 and 3 and an intermediate region 4 separating them.
  • the end regions 2 and 3 are aligned on the central axis of the body 1, which defines a direction of longitudinal extension of the body 1.
  • the end regions 2 and 3 are assigned to the connection to conductive parts not represented by screws or bolts and have inserts 5 of connection to these conductive parts, shown separately in the figure 4 .
  • They are in the general shape of a sleeve, in particular radiated in order to reduce the electric fields, and comprise three pins 6 on a flat face 7. They also comprise, as can be seen in FIG.
  • FIG. 2 a central threaded bore 8 for the engagement of a screw rod that may belong to the connecting means and a nut recess 9, set opposite the flat face 7 mentioned above, serving to receive if necessary a nut connection means.
  • the inserts 5 are placed in respective housings 10 of the end regions 2 and 3.
  • the housings 10 open towards the outside of the body 1 in the lateral direction, through openings 12 passing through a peripheral wall 11 established around each of the extreme regions. 2 and 3 and continue on a circle otherwise. They are delimited each by a bottom wall 13 connected at its ends to the side wall 11, and by a perforated partition 14, flat and located at a respective end of the body 1 in its direction of longitudinal extension.
  • the flat face 7 of the inserts 5 is placed on perforated partitions 14, which are recessed holes 15 delivering passage to the screw rods of the connecting means.
  • the perforated partitions 14 are also provided with holes for housing the pins 6, which make it possible to hold the inserts 5 in place in their housing 10.
  • the inserts 5 and the bottom walls 13 are then concentric and leave a uniform clearance (except for openings 12) which allow to obtain a uniform electric field around the inserts 5.
  • the inserts 5 and the housing 10 are in any number according to the needs of the support to be performed.
  • the end region 2 here comprises a single and central insert 5, and the other end region 3 comprises two eccentric and opposed inserts 5. This difference explains that the extreme regions 2 and 3 have different radii here and that the intermediate region 4 connecting them is conical, but this is not an essential feature of the invention.
  • Internal ribs 16 unite the bottom walls 13 between them and the peripheral wall 11. One of them extends in the center of the body 1 to the widest end region 3 and defines a casting origin 17 for the manufacture of the body 1.
  • the intermediate region 4 of the body 1 is composed exclusively of an intercrossing of ribs, including longitudinal ribs 18 extending in the main extension direction of the body 1 and joining the regions of the extremes 2 and 3 between them, and ribs transverse 19 crossing the previous ones and arranged regularly; alternatively, if the mechanical strength can be reduced without risk, there could be only two or four ribs.
  • the longitudinal ribs 18 are radiating but have a complex arrangement visible to the figure 3 they branch out in fact at different distances to the central axis of the body 1.
  • transverse ribs 19 are circular and continuous, and they still create reliefs around the intermediate region 4.
  • All the ribs 18 and 19 have an identical and constant thickness. A last precaution taken to thwart the formation of accidental arcing is visible in the angular offset between the openings 12 of the housing 10 of an extreme region 2 to the other 3, which is here 90 °, in order to impose electric arcs a longer helical path.
  • the inserts 5 are not necessary if the connecting means of the body 1 to the conductive parts comprise ordinary screws 20.
  • the screws 20 are inserted into the housings 10, their rods 21 passing through the bores 15, and the heads 22 of the screws 20 are retained in the housings 10.
  • self-tapping screws may be used to make the recesses 15 themselves.
  • through perforated partitions 14 first continuous. An identical provision would then be obtained.
  • the height of the housings 10 is chosen to allow this insertion of the screws 20. It is shown schematically the conductive part 23 retained by the screw 20 and resting on the perforated partition 14. The other piece conductor would be placed in the same way vis-à-vis the other extreme region of the insulator-support.
  • the body 1 is manufactured by molding thermoplastic polymer in a mold which is dedicated to it, the melt being injected first into the casting origin 17 before flowing both axially towards the extreme region 2 and radially. to the outside, without really encountering any obstacle or narrow passage that could lead to manufacturing defects: a gradual, fairly fast and homogeneous casting can instead be expected.
  • the inserts 5 (when they exist) are manufactured separately by molding or machining of metal and then installed in the body 1 when it has been demolded.

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  • Insulators (AREA)
  • Insulating Bodies (AREA)

Abstract

The support has a cylindrical or conical body (1) comprising opposed extreme areas (2, 3) along a longitudinal extension direction of the body. The body includes a reception unit for receiving ends of connection unit e.g. screw or bolt, for connecting the body to electricity conducting parts. The reception unit includes housings (10) provided with openings (12) on a lateral side of the body for joining the extreme areas. The housings are delimited by a perforated partition (14) for passage of a stem of connection and retaining unit of a prominent end of the connection unit.

Description

La présente invention a trait à un isolateur-support de l'électricité, du genre destiné à maintenir séparées deux pièces conductrices de l'électricité à des potentiels différents en résistant ainsi au moins à une moyenne tension.The present invention relates to an insulator-support of electricity, of the kind intended to keep separate two electrically conductive parts at different potentials thus resisting at least a medium voltage.

Les pièces conductrices peuvent être un conducteur de l'électricité et son enveloppe, appartenant à un appareillage électrique à atmosphère confirmée, et elles sont fixées à des extrémités opposées de l'isolateur-support par des vis ou des moyens analogues. L'isolateur-support est muni d'inserts métalliques filetés dans lesquels les vis sont engagées, et ces inserts métalliques sont retenus en étant encastrés dans le corps isolant constituant la partie maîtresse de l'isolateur-support, par surmoulage du corps autour de ces inserts.The conductive parts may be an electrical conductor and its envelope, belonging to a confirmed atmosphere electrical apparatus, and they are attached to opposite ends of the insulator-support by screws or the like. The insulator-support is provided with threaded metal inserts in which the screws are engaged, and these metal inserts are retained by being embedded in the insulating body constituting the main part of the insulator-support, by overmolding the body around these inserts.

La matière utilisée pour mouler le corps de l'isolateur-support est généralement de la résine époxy ou un autre polymère thermodurcissable, même si des matières thermoplastiques ont aussi été proposées, notamment dans le document WO 2011/023721 A . Quoi qu'il en soit, le surmoulage rend difficile la séparation des inserts et du corps et compromet donc la possibilité de recycler facilement l'isolateur-support après son service. Cet inconvénient de recyclage difficile ou impossible est encore plus manifeste avec les matières thermodurcissables. On peut encore reprocher aux conceptions existantes d'être lourdes et volumineuses.The material used to mold the body of the insulator-support is generally epoxy resin or another thermosetting polymer, even if thermoplastic materials have also been proposed, particularly in the document WO 2011/023721 A . In any case, the overmolding makes it difficult to separate the inserts and the body and thus compromises the possibility of easily recycling the insulator-support after its service. This disadvantage of difficult or impossible recycling is even more obvious with thermosetting materials. One can still blame existing designs for being heavy and bulky.

On vise à une simplification du procédé de fabrication de ces isolateurs-supports avec l'invention, en premier lieu en éliminant les inserts surmoulés, afin de permettre une fabrication séparée du corps et des inserts, puis un recyclage aisé. Les inserts peuvent être assemblés au corps de façon simple mais parfaitement résistante. Dans certaines réalisations, les inserts peuvent même être complètement omis et l'isolateur-support est alors composé seulement du corps. Une construction légère et une bonne qualité d'isolation électrique du corps est de toute façon possible.It is intended to simplify the manufacturing process of these insulators with the invention, firstly by eliminating the molded inserts, to allow separate manufacture of the body and inserts, then easy recycling. The inserts can be assembled to the body in a simple way but perfectly resistant. In some embodiments, the inserts may even be completely omitted and the insulator-holder is then composed only of the body. A lightweight construction and a good quality of electrical insulation of the body is anyway possible.

Sous une forme générale, l'invention concerne un isolateur-support du genre mentionné, comprenant un corps en polymère à deux régions extrêmes, opposées sur une direction d'extension longitudinale du corps, comprenant des moyens de réception d'extrémités de moyens de liaison dudit corps auxdites pièces, caractérisé en ce que lesdits moyens de réception comprennent des logements pourvus d'une ouverture principale établie sur un côté latéral du corps, qui joint lesdites régions extrêmes, et délimités par une cloison ajourée de passage d'une tige des moyens de liaison et de retenue d'une extrémité saillante des moyens de liaison.In a general form, the invention relates to an insulator-support of the kind mentioned, comprising a polymer body having two extreme regions, opposite in a direction of longitudinal extension of the body, comprising means for receiving ends of connecting means. from said body to said parts, characterized in that said receiving means comprise housings provided with a main opening established on a lateral side of the body, which joins said end regions, and delimited by a perforated partition wall of a rod means connecting and retaining a projecting end of the connecting means.

Ainsi qu'on l'a mentionné, les moyens de liaison comprennent usuellement des vis ou des boulons. Selon le cas, les logements pourront retenir des écrous, des têtes de vis ou des inserts rapportés analogues par leur forme à des écrous, qu'on introduit par les ouvertures latérales. Les tiges de vis passent par les jours des cloisons et retiennent les extrémités saillantes dans les logements. L'invention resterait utilisable avec tout autre moyen de liaison de forme analogue, à tige terminée par une extrémité saillante.As mentioned, the connecting means usually include screws or bolts. Depending on the case, the housings may retain nuts, screw heads or insert inserts similar in shape to nuts, which are introduced through the side openings. The screw rods pass through the days of the partitions and retain the projecting ends in the housings. The invention would remain usable with any other connecting means of similar shape, rod terminated by a projecting end.

De nombreux perfectionnements peuvent être apportés à cette définition générale. C'est ainsi qu'on préconise de fabriquer le corps en un polymère thermoplastique afin de le rendre facilement recyclable.Many improvements can be made to this general definition. It is thus recommended to manufacture the body in a thermoplastic polymer to make it easily recyclable.

Dans un certain nombre de conceptions, l'isolateur-support comprend des inserts métalliques rapportés dans les logements et recevant les moyens de fixation, tout en constituant les extrémités saillantes de ces moyens. Ces inserts métalliques sont alors rapportés sans surmoulage et peuvent donc être facilement séparés du corps de l'isolateur plus tard. Ils peuvent avantageusement lui être associés en comprenant des picots pénétrant dans les trous correspondant des cloisons extrêmes du corps, afin de maintenir les inserts à une position fixe.In a number of designs, the insulator-support comprises metal inserts reported in the housing and receiving the fixing means, while constituting the projecting ends of these means. These metal inserts are then reported without overmolding and can be easily separated from the body of the insulator later. They can advantageously be associated with it by including pimples penetrating the corresponding holes of the end bulkheads of the body, in order to keep the inserts at a fixed position.

Les inserts peuvent par ailleurs être taraudés pour être fixés à des vis, ou munis d'empreintes d'écrous, des moyens de liaison.The inserts may also be threaded to be fixed to screws, or provided with fingerprints, connecting means.

Le corps peut, d'une manière générale, avantageusement être construit avec une structure nervurée afin de l'alléger sans réduire notablement sa résistance mécanique ni diélectrique, grâce aux reliefs et à la continuité des nervures, qui permettent de résister au champ électrique et d'allonger les lignes d'arc ; de plus, cette solution permet d'éviter les fortes épaisseurs de matière thermoplastique générant des défauts de type porosité au coeur de la matière. Il peut aussi comprendre des nervures longitudinales joignant les régions extrêmes, ces nervures étant parallèles à une direction principale d'extension du corps. Ces nervures sont avantageusement rayonnantes. Elles peuvent se ramifier à partir de distances différentes à un axe central du corps afin d'éviter leur coalescence générale et une accumulation de matière au centre susceptible de provoquer des défauts de moulage. Le corps peut aussi comprendre des nervures transversales perpendiculaires à la direction principale de son extension, dont les effets principaux sont d'introduire un cloisonnement diélectrique, de raidir les nervures longitudinales quand elles existent et d'allonger les lignes de fuite. Le corps peut même être entièrement composé de ces nervures longitudinales et transversales entrecroisées, du moins entre les régions extrêmes, où les logements imposeront en général une constitution un peu différente.The body may, in a general manner, advantageously be constructed with a ribbed structure in order to lighten it without significantly reducing its mechanical or dielectric strength, thanks to the reliefs and the continuity of the ribs, which make it possible to withstand the electric field and to lengthen the arc lines; moreover, this solution makes it possible to avoid the high thicknesses of thermoplastic material generating defects of the porosity type in the heart of the material. It may also comprise longitudinal ribs joining the extreme regions, these ribs being parallel to a main direction of extension of the body. These ribs are advantageously radiating. They can branch off from different distances to a central axis of the body to prevent their general coalescence and a build-up of material in the center that can cause mold defects. The body may also include transverse ribs perpendicular to the main direction of its extension, the main effects of which are to introduce a dielectric partition, to stiffen the longitudinal ribs when they exist and to lengthen the vanishing lines. The body may even be entirely composed of these intersecting longitudinal and transverse ribs, at least between the extreme regions, where the dwellings will generally impose a slightly different constitution.

Avantageusement encore, les nervures ont une épaisseur identique et constante, afin de faciliter la fabrication du corps par moulage.Advantageously, the ribs have an identical and constant thickness, to facilitate the manufacture of the body by molding.

Les régions extrêmes peuvent comprendre une paroi périphérique continue sauf aux ouvertures principales des logements. Celles-ci sont avantageusement décalées angulairement, autour de la direction principale d'extension du corps, d'une des régions extrêmes à l'autre, ici encore afin de réduire les risques d'arcs électriques.Extreme areas may include a continuous peripheral wall except at the main openings of dwellings. These are advantageously angularly offset around the main direction of extension of the body, from one extreme region to another, again to reduce the risk of arcing.

Les logements sont délimités par des parois de fond. Il est avantageux que quand des inserts sont prévus, ils soient séparés de ces parois par un jeu constant.The dwellings are delimited by bottom walls. It is advantageous that when inserts are provided, they are separated from these walls by constant play.

Les différents aspects de l'invention seront maintenant décrits plus en détails au moyen des figures suivantes :

  • la figure 1 représente une vue générale de l'isolateur-support,
  • les figures 2 et 3, deux coupes transversales,
  • la figure 4, une vue d'un des inserts, et
  • la figure 5, un autre mode de réalisation dépourvu d'inserts.
The different aspects of the invention will now be described in more detail by means of the following figures:
  • the figure 1 represents a general view of the insulator-support,
  • the figures 2 and 3 , two cross sections,
  • the figure 4 , a view of one of the inserts, and
  • the figure 5 another embodiment without inserts.

L'isolateur-support de l'invention comprend pour l'essentiel un corps 1 de forme cylindrique ou conique comprenant deux régions extrêmes 2 et 3 et une région intermédiaire 4 les séparant. Les régions extrêmes 2 et 3 sont alignées sur l'axe central du corps 1, qui définit une direction d'extension longitudinale du corps 1. Les régions extrêmes 2 et 3 sont affectées à la liaison à des pièces conductrices non représentées par des vis ou des boulons et possèdent des inserts 5 de liaison à ces pièces conductrices, représentés isolément à la figure 4. Ils sont en forme générale de douille, notamment rayonnée afin de réduire les champs électriques, et comprennent trois picots 6 sur une face plane 7. Ils comprennent encore, ainsi qu'on le voit à la figure 2, un perçage taraudé 8 central pour l'engagement d'une tige de vis susceptible d'appartenir aux moyens de liaison et une empreinte d'écrou 9, établie à l'opposé de la face plane 7 mentionnée ci-dessus, servant à recevoir en cas de besoin un écrou des moyens de liaison. Les inserts 5 sont placés dans des logements 10 respectifs des régions extrêmes 2 et 3. Les logements 10 s'ouvrent vers l'extérieur du corps 1 en direction latérale, par des ouvertures 12 traversant une paroi périphérique 11 établie autour de chacune des régions extrêmes 2 et 3 et continue sur un cercle par ailleurs. Ils sont délimités chacun par une paroi de fond 13 se raccordant par ses extrémités à la paroi latérale 11, et par une cloison ajourée 14, plate et située à une extrémité respective du corps 1 dans sa direction d'extension longitudinale. La face plate 7 des inserts 5 est posée sur des cloisons ajourées 14, qui sont évidées de perçages 15 livrant passage aux tiges de vis des moyens de liaison. Les cloisons ajourées 14 sont également munies de trous de logement des picots 6, qui permettent de maintenir les inserts 5 en place dans leur logement 10. Les inserts 5 et les parois de fond 13 sont alors concentriques et laissent subsister un jeu uniforme (sauf près des ouvertures 12) qui permettent l'obtention d'un champ électrique également uniforme autour des inserts 5. Les inserts 5 et les logements 10 sont en nombre quelconque selon les besoins du support à accomplir. La région extrême 2 comporte ici un insert 5 unique et central, et l'autre région extrême 3 comporte deux inserts 5 excentrés et opposés. Cette différence explique que les régions extrêmes 2 et 3 aient ici des rayons différents et que la région intermédiaire 4 les reliant soit conique, mais cela n'est pas un trait essentiel de l'invention.The insulator-support of the invention essentially comprises a body 1 of cylindrical or conical shape comprising two end regions 2 and 3 and an intermediate region 4 separating them. The end regions 2 and 3 are aligned on the central axis of the body 1, which defines a direction of longitudinal extension of the body 1. The end regions 2 and 3 are assigned to the connection to conductive parts not represented by screws or bolts and have inserts 5 of connection to these conductive parts, shown separately in the figure 4 . They are in the general shape of a sleeve, in particular radiated in order to reduce the electric fields, and comprise three pins 6 on a flat face 7. They also comprise, as can be seen in FIG. figure 2 , a central threaded bore 8 for the engagement of a screw rod that may belong to the connecting means and a nut recess 9, set opposite the flat face 7 mentioned above, serving to receive if necessary a nut connection means. The inserts 5 are placed in respective housings 10 of the end regions 2 and 3. The housings 10 open towards the outside of the body 1 in the lateral direction, through openings 12 passing through a peripheral wall 11 established around each of the extreme regions. 2 and 3 and continue on a circle otherwise. They are delimited each by a bottom wall 13 connected at its ends to the side wall 11, and by a perforated partition 14, flat and located at a respective end of the body 1 in its direction of longitudinal extension. The flat face 7 of the inserts 5 is placed on perforated partitions 14, which are recessed holes 15 delivering passage to the screw rods of the connecting means. The perforated partitions 14 are also provided with holes for housing the pins 6, which make it possible to hold the inserts 5 in place in their housing 10. The inserts 5 and the bottom walls 13 are then concentric and leave a uniform clearance (except for openings 12) which allow to obtain a uniform electric field around the inserts 5. The inserts 5 and the housing 10 are in any number according to the needs of the support to be performed. The end region 2 here comprises a single and central insert 5, and the other end region 3 comprises two eccentric and opposed inserts 5. This difference explains that the extreme regions 2 and 3 have different radii here and that the intermediate region 4 connecting them is conical, but this is not an essential feature of the invention.

Des nervures internes 16 unissent les parois de fond 13 entre elles et à la paroi périphérique 11. L'une d'entre elles s'étend au centre du corps 1 à la région extrême 3 la plus large et définit une origine de coulée 17 pour la fabrication du corps 1.Internal ribs 16 unite the bottom walls 13 between them and the peripheral wall 11. One of them extends in the center of the body 1 to the widest end region 3 and defines a casting origin 17 for the manufacture of the body 1.

La région intermédiaire 4 du corps 1 est composée exclusivement d'un entrecroisement de nervures, dont des nervures longitudinales 18 s'étendant dans la direction d'extension principale du corps 1 et joignant les régions des extrêmes 2 et 3 entre elles, et des nervures transversales 19 croisant les précédentes et disposées régulièrement ; alternativement, si la résistance mécanique peut être diminuée sans risque, il pourrait n'y avoir que deux ou quatre nervures. Les nervures longitudinales 18 sont rayonnantes mais ont une disposition complexe visible à la figure 3 : elles se ramifient en effet à des distances différentes à l'axe central du corps 1. On peut distinguer quatre nervures 18a, 18b, 18c et 18d en croix, quatre autres nervures 18e, 18f, 18g et 18h, à intervalles angulaires égaux de 45° avec les précédentes mais qui s'embranchent seulement sur les nervures 18a et 18c opposées mais restent à l'écart des autres nervures 18b et 18d, et qui ne sont donc pas orientées vers le centre de la structure ; et chacune de ces nervures 18e à 18h se ramifie en une paire de nervures 18i et 18j à angle droit, parallèles respectivement à l'une des nervures 18a et 18c en prolongement et l'une des nervures 18b et 18d en prolongement, à une distance assez grande du centre. Cette structure rayonnante mais irrégulière possède une épaisseur à peu près uniforme partout, ce qui réduit les risques de défaut de moulage du polymère. Le grand nombre de nervures conjoint à la bonne régularité de leur disposition accroît la résistance du corps 1.The intermediate region 4 of the body 1 is composed exclusively of an intercrossing of ribs, including longitudinal ribs 18 extending in the main extension direction of the body 1 and joining the regions of the extremes 2 and 3 between them, and ribs transverse 19 crossing the previous ones and arranged regularly; alternatively, if the mechanical strength can be reduced without risk, there could be only two or four ribs. The longitudinal ribs 18 are radiating but have a complex arrangement visible to the figure 3 they branch out in fact at different distances to the central axis of the body 1. We can distinguish four ribs 18a, 18b, 18c and 18d in cross, four other ribs 18e, 18f, 18g and 18h, at equal angular intervals of 45 ° with the previous ones but which branch only on the opposite ribs 18a and 18c but remain the distance from the other ribs 18b and 18d, and which are therefore not oriented towards the center of the structure; and each of these ribs 18e to 18h branched into a pair of ribs 18i and 18j at right angles, parallel respectively to one of the ribs 18a and 18c in extension and one of the ribs 18b and 18d in extension, at a distance big enough from the center. This radiating but irregular structure has an almost uniform thickness everywhere, which reduces the risk of molding failure of the polymer. The large number of ribs combined with the good regularity of their arrangement increases the resistance of the body 1.

Les nervures transversales 19 sont circulaires et continues, et elles créent encore des reliefs autour de la région intermédiaire 4.The transverse ribs 19 are circular and continuous, and they still create reliefs around the intermediate region 4.

Leurs effets principaux sont de multiplier les parois diélectriques entre les inserts de potentiels différents et d'allonger la ligne de fuite entre les conducteurs de potentiel différent.Their main effects are to multiply the dielectric walls between the inserts of different potentials and to lengthen the line of leakage between the drivers of different potential.

Toutes les nervures 18 et 19 ont une épaisseur identique et constante. Une dernière précaution prise pour contrarier la formation d'arcs électriques accidentels est visible dans le décalage angulaire entre les ouvertures 12 des logements 10 d'une région extrême 2 à l'autre 3, qui est ici de 90°, afin d'imposer à des arcs électriques un trajet hélicoïdal plus long.All the ribs 18 and 19 have an identical and constant thickness. A last precaution taken to thwart the formation of accidental arcing is visible in the angular offset between the openings 12 of the housing 10 of an extreme region 2 to the other 3, which is here 90 °, in order to impose electric arcs a longer helical path.

Certains autres modes de réalisation seront décrits au moyen de la figure 5. Les inserts 5 ne sont pas nécessaires si les moyens de liaison du corps 1 aux pièces conductrices comportent des vis 20 ordinaires. Les vis 20 sont insérées dans les logements 10, leurs tiges 21 traversant les perçages 15, et les têtes 22 des vis 20 sont retenues dans les logements 10. En variante, des vis autotaraudeuses peuvent être utilisées pour réaliser les évidements 15 elles-mêmes à travers des cloisons ajourées 14 d'abord continues. Une disposition identique serait alors obtenue. La hauteur des logements 10 est choisie pour permettre cette insertion des vis 20. On a schématiquement représenté la pièce conductrice 23 retenue par la vis 20 et en appui sur la cloison ajourée 14. L'autre pièce conductrice serait placée de la même façon vis-à-vis de l'autre région extrême de l'isolateur-support.Some other embodiments will be described by means of the figure 5 . The inserts 5 are not necessary if the connecting means of the body 1 to the conductive parts comprise ordinary screws 20. The screws 20 are inserted into the housings 10, their rods 21 passing through the bores 15, and the heads 22 of the screws 20 are retained in the housings 10. Alternatively, self-tapping screws may be used to make the recesses 15 themselves. through perforated partitions 14 first continuous. An identical provision would then be obtained. The height of the housings 10 is chosen to allow this insertion of the screws 20. It is shown schematically the conductive part 23 retained by the screw 20 and resting on the perforated partition 14. The other piece conductor would be placed in the same way vis-à-vis the other extreme region of the insulator-support.

Le corps 1 est fabriqué par moulage de polymère thermoplastique, dans un moule qui lui est consacré, la matière fondue étant injectée d'abord dans l'origine de coulée 17 avant de s'écouler à la fois axialement vers la région extrême 2 et radialement vers l'extérieur, sans rencontrer véritablement d'obstacle ni de passage étroit qui pourrait engendrer des défauts de fabrication : une coulée progressive, assez rapide et homogène peut au contraire être espérée. Les inserts 5 (quand ils existent) sont fabriqués séparément par moulage ou usinage de métal et installés ensuite dans le corps 1 lorsqu'il a été démoulé.The body 1 is manufactured by molding thermoplastic polymer in a mold which is dedicated to it, the melt being injected first into the casting origin 17 before flowing both axially towards the extreme region 2 and radially. to the outside, without really encountering any obstacle or narrow passage that could lead to manufacturing defects: a gradual, fairly fast and homogeneous casting can instead be expected. The inserts 5 (when they exist) are manufactured separately by molding or machining of metal and then installed in the body 1 when it has been demolded.

Claims (15)

Isolateur-support, destiné à séparer deux pièces conductrices de l'électricité à des potentiels différents, à moyenne tension au moins, comprenant un corps (1) en polymère dont deux régions extrêmes (2, 3), opposées sur une direction d'extension longitudinale du corps, comprennent des moyens de réception d'extrémités de moyens de liaison dudit corps (1) auxdites pièces, caractérisé en ce que lesdits moyens de réception comprennent des logements (10) pourvus d'une ouverture (12) principale établie sur un côté latéral du corps, qui joint lesdites régions extrêmes, et délimités par une cloison (14) ajourée de passage d'une tige des moyens de liaison et de retenue d'une extrémité saillante des moyens de liaison.Insulator-carrier, for separating two electrically conductive parts at different potentials, at least medium voltage, comprising a body (1) made of polymer, two end regions (2, 3), opposite in a direction of extension longitudinal of the body, comprise means for receiving ends of connecting means of said body (1) to said parts, characterized in that said receiving means comprise housings (10) provided with a main opening (12) established on a lateral side of the body, which joins said end regions, and delimited by a partition (14) perforated passage of a rod means for connecting and retaining a projecting end of the connecting means. Isolateur-support suivant la revendication 1, caractérisé en ce que le corps (1) est en polymère thermoplastique.Insulator carrier according to Claim 1, characterized in that the body (1) is made of thermoplastic polymer. Isolateur-support suivant la revendication 1 ou 2, caractérisé en ce qu'il comprend des inserts (5) métalliques rapportés dans les logements (10) sans surmoulage du corps et recevant les moyens de liaison.Support insulator according to claim 1 or 2, characterized in that it comprises inserts (5) metal reported in the housings (10) without overmolding the body and receiving the connecting means. Isolateur-support suivant la revendication 3, caractérisé en ce que les inserts sont munis de picots (6) enfoncés dans des trous correspondants desdites cloisons.Insulator-carrier according to claim 3, characterized in that the inserts are provided with pins (6) driven into corresponding holes of said partitions. Isolateur-support suivant la revendication 3, caractérisé en ce que les inserts sont munis de perçages taraudés (8) pour être fixés à des vis des moyens de liaison.Support insulator according to Claim 3, characterized in that the inserts are provided with tapped holes (8) for attachment to screws of the connecting means. Isolateur-support suivant la revendication 3 ou 5, caractérisé en ce que les inserts sont munis d'empreintes d'écrou (9) des moyens de liaison.Insulator carrier according to Claim 3 or 5, characterized in that the inserts are provided with nut impressions (9) of the connecting means. Isolateur-support suivant la revendication 1 ou 2, caractérisé en ce que le corps comprend des nervures longitudinales (18) joignant les régions extrêmes et parallèles à la direction principale d'extension du corps.Support insulator according to claim 1 or 2, characterized in that the body comprises longitudinal ribs (18) joining the end regions and parallel to the main direction of extension of the body. Isolateur-support suivant la revendication 7, caractérisé en ce que les nervures longitudinales sont rayonnantes.Support insulator according to Claim 7, characterized in that the longitudinal ribs are radiating. Isolateur-support suivant la revendication 8, caractérisé en ce que les nervures longitudinales se ramifient à partir de distances différentes à un axe central du corps.Support insulator according to Claim 8, characterized in that the longitudinal ribs branch out from different distances to a central axis of the body. Isolateur-support suivant la revendication 1 ou 2, caractérisé en ce que le corps comprend des nervures transversales (19) perpendiculaires à la direction principale d'extension du corps.Support insulator according to claim 1 or 2, characterized in that the body comprises transverse ribs (19) perpendicular to the main direction of extension of the body. Isolateur-support suivant les revendications 7 et 10, caractérisé en ce qu'il est entièrement composé des nervures longitudinales et transversales entre les régions extrêmes.Support insulator according to Claims 7 and 10, characterized in that it consists entirely of the longitudinal and transverse ribs between the end regions. Isolateur-support suivant la revendication 11, caractérisé en ce que les nervures ont une épaisseur identique et constante.Support insulator according to Claim 11, characterized in that the ribs have an identical and constant thickness. Isolateur-support suivant la revendication 1 ou 2, caractérisé en ce que les régions extrêmes (2, 3) comprennent une paroi périphérique continue (11) sauf aux ouvertures (12) principales des logements (10).Support insulator according to Claim 1 or 2, characterized in that the end regions (2, 3) comprise a continuous peripheral wall (11) except at the main openings (12) of the housings (10). Isolateur-support suivant la revendication 1 ou 2, caractérisé en ce que les ouvertures (12) principales des logements sont décalées angulairement, autour de la direction principale d'extension du corps, d'une des régions extrêmes à l'autre.Support insulator according to Claim 1 or 2, characterized in that the main openings (12) of the recesses are angularly offset, around the main direction of extension of the body, from one extreme region to the other. Isolateur-support suivant la revendication 3, caractérisé en ce que les logements ont des parois de fond (13) séparées des inserts (5) par un jeu constant.Insulator carrier according to Claim 3, characterized in that the recesses have bottom walls (13) separated from the inserts (5) by constant play.
EP14150351.6A 2013-01-11 2014-01-07 Medium-voltage supporting insulator Active EP2755212B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1350258A FR3001080B1 (en) 2013-01-11 2013-01-11 ISOLATOR-MEDIUM MEDIUM VOLTAGE SUPPORT

Publications (2)

Publication Number Publication Date
EP2755212A1 true EP2755212A1 (en) 2014-07-16
EP2755212B1 EP2755212B1 (en) 2015-07-29

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Application Number Title Priority Date Filing Date
EP14150351.6A Active EP2755212B1 (en) 2013-01-11 2014-01-07 Medium-voltage supporting insulator

Country Status (4)

Country Link
EP (1) EP2755212B1 (en)
CN (1) CN103928201B (en)
ES (1) ES2547346T3 (en)
FR (1) FR3001080B1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011023721A1 (en) 2009-08-28 2011-03-03 Kuvag Gmbh & Co Kg Injection molded insulator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9203213U1 (en) * 1992-03-06 1992-04-23 Wirthwein, Udo, 6993 Creglingen Busbar supports
JPH06162854A (en) * 1992-11-16 1994-06-10 Toshiba Corp Insulative supporting tool
US7799999B2 (en) * 2007-08-20 2010-09-21 Varian Semiconductor Equipment Associates, Inc. Insulated conducting device with multiple insulation segments
CN101694793B (en) * 2009-10-19 2011-10-05 山东彼岸电力科技有限公司 Insulating supporting rod for high-voltage electrical appliance and production method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011023721A1 (en) 2009-08-28 2011-03-03 Kuvag Gmbh & Co Kg Injection molded insulator

Also Published As

Publication number Publication date
FR3001080A1 (en) 2014-07-18
FR3001080B1 (en) 2015-03-13
CN103928201B (en) 2017-04-12
CN103928201A (en) 2014-07-16
EP2755212B1 (en) 2015-07-29
ES2547346T3 (en) 2015-10-05

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