FR2524692A2

FR2524692A2 - Retainer for conductor in lateral groove of insulator - comprises two wire loops wrapped around conductor and groove and screw tightened by elastomeric element

Info

Publication number: FR2524692A2
Application number: FR8205929A
Authority: FR
Inventors: Michel Willem
Original assignee: Ceraver SA
Current assignee: Ceraver SA
Priority date: 1982-04-06
Filing date: 1982-04-06
Publication date: 1983-10-07
Also published as: FR2524692B2

Abstract

The conducto (5) is held in a shallow circular gooVe (4) between the cap (3) and skirt of the insulator, by two elastic metallic wire loops (6,11). Their closed ends (7,12) are wapped around a bolt (21), separated by a cylindrical elastomer spacer (20) and pairs of washers (23,24), and secured in compression by a nut (22). The open ends pass through a common elongated ring (10) gripped between the conductor and groove, and are wrapped in spirals (8,9;13,14) around the conducto. They ma be bonded together fro the point hee they emerge fo the ring (10). The spacer (20) may be a stack of ings of differing diaeter. The cable is freed b loosening the nut (22) sufficiently for the loops (6,11) to move apat until the assembl can be lifted clear of the cap.

Description

Ligature pour la retenue d'un conducteur électrique dans la gorge d'un isolateur rigide
Dans le brevet principal on a décrit une ligature pour la retenue d'un conducteur électrique dans la gorge d'un isolateur rigide comportant deux branches sensiblement symétriques par rapport à un plan de symétrie de l'isolateur orthogonal au câble, chaque branche ayant une partie intermédiaire en arc de cercle dont le rayon de courbure est sensiblement celui du fond de la gorge.Ligation for retaining an electrical conductor in the groove of a rigid insulator
In the main patent, a ligature has been described for retaining an electrical conductor in the groove of a rigid insulator comprising two branches substantially symmetrical with respect to a plane of symmetry of the insulator orthogonal to the cable, each branch having a part intermediate in an arc, the radius of curvature of which is substantially that of the bottom of the groove.

Chaque branche passe ensuite dans un anneau commun aux deux branches et présente sa première extrémité sous la forme d'une attache spiralée pour ledit câble. La seconde extrémité a sensiblement la forme d'une boucle et les boucles des deux branches sont maintenues par un moyen de serrage qui peut être du type tige filetée-écrou. Each branch then passes through a ring common to the two branches and has its first end in the form of a spiral attachment for said cable. The second end has substantially the shape of a loop and the loops of the two branches are held by a tightening means which can be of the threaded rod-nut type.

Chaque branche peut être constituée par au moins un fil métallique replié en son milieu de manière à former ladite boucle. Each branch can be formed by at least one metal wire folded in the middle so as to form said loop.

Dans le mode de réalisation décrit et représenté, l'anneau commun est allongé et fermé et épouse la forme de la gorge latérale de l'isolateur. In the embodiment described and shown, the common ring is elongated and closed and takes the shape of the lateral groove of the insulator.

La présente invention a notamment pour objet un mode de réalisation particulièrement avantageux pour ledit anneau. The present invention particularly relates to a particularly advantageous embodiment for said ring.

Selon l'invention, l'anneau allongé est constitué par repli d'un fil métallique, et à chaque extrémité il y a superposition d'au moins un repli en épingle à cheveu et d'une spire ouverte. According to the invention, the elongated ring is formed by folding a metal wire, and at each end there is superposition of at least one fold in hairpin and an open turn.

Avantageusement les parties extrêmes du fil formant l'anneau sont légèrement cintrées de manière à ne pas faire saillie. Advantageously, the end parts of the wire forming the ring are slightly curved so as not to protrude.

La figure 1 représente un tel anneau. Figure 1 shows such a ring.

La figure 2 représente l'anneau mis en place au sein de la ligature. Figure 2 shows the ring in place within the ligature.

A chaque extrémité le fil métallique constituant l'anneau 1 forme un repli 2, 3 en épingle à cheveu qui est superposé avec une spire ouverte 4, 5. Le changement de direction de l'attache 10 du câble se fait donc en prenant appui sur deux sections du fil de l'anneau, ce qui diminue le risque d'endommagement de la ligature. At each end, the metal wire constituting the ring 1 forms a fold 2, 3 in a hairpin which is superimposed with an open turn 4, 5. The change of direction of the fastener 10 of the cable is therefore made by resting on two sections of the ring wire, which reduces the risk of damage to the ligature.

En outre les deux parties extrêmes 6, 7 du fil formant l'anneau 1 sont légèrement cintrées de manière à se trouver sensi blement dans un même plan vers 11l'intérieur" de l'anneau, pour que les pointes extrêmes 8, 9 ne blessent ni. le câble, ni le verre de l'isolateur 11. Le fil utilisé pour constituer l'anneau peut être de l'Alumoweld (aluminium * acier), ou de l'acier inoxydable, ou de l'Almelec. In addition, the two end parts 6, 7 of the wire forming the ring 1 are slightly bent so as to be substantially in the same plane towards the inside "of the ring, so that the end points 8, 9 do not injure neither the cable nor the glass of the insulator 11. The wire used to form the ring can be Alumoweld (aluminum * steel), or stainless steel, or Almelec.

Dans le brevet principal il a eté indiqué qu'une pièce en élastomère cylindrique était disposée entre les boucles des deux branches. In the main patent it was indicated that a cylindrical elastomer part was placed between the loops of the two branches.

Avantageusement la pièce peut présenter un profil lui permettant d'épouser sensiblement la forme de la gorge latérale de l'isolateur, assurant ainsi un maintien efficace de l'attache au niveau de ladite gorge, ce qui est nécessaire dan;i le cas de lignes sollicitées mécaniquement, notamment en vibration. Ce résultat peut également être obtenu en remplaçant la pièce cylindrique par des rondelles en élastomère de diamètres différents. Advantageously, the part can have a profile allowing it to substantially match the shape of the lateral groove of the insulator, thus ensuring effective retention of the fastener at the level of said groove, which is necessary in the case of lines. mechanically stressed, especially in vibration. This result can also be obtained by replacing the cylindrical part with elastomer washers of different diameters.

Bien entendu l'invention n'est nullement limitée aux modes d'exécution décrits et représentés qui n'ont été donnés qu'à titre d'exemples. Of course, the invention is in no way limited to the embodiments described and shown, which have been given only by way of examples.

Claims

1 / ligature for retaining an electrical conductor in the groove of a rigid insulator according to claim 1 of the main patent comprising two branches substantially symmetrical with respect to a plane of symmetry of the insulator orthogonal to the cable, each branch having a intermediate part in an arc of a circle whose radius of curvature is substantially that of the bottom of the groove and then passing through an elongated ring common to the two branches, characterized in that the ring (1) is formed by bending a wire metallic and at each end of said ring there is a superposition of at least one fold (2, 3) in hairpin and of an open turn (4 5).

2 / ligature according to claim 1, characterized in that the end parts (6, 7) of the metal wire forming the ring (1) are slightly bent so as not to protrude.

3 / ligature for retaining an electrical conductor in the groove of a rigid insulator according to claim 1 of the main patent comprising two branches substantially symmetrical with respect to a plane of symmetry of the insulator orthogonal to the cable, each branch having a intermediate part in an arc of a circle whose radius of curvature is substantially that of the bottom of the groove and then passing through an elongated ring common to the two branches, the first end of the branch being in the form of a spiral attachment for the cable , the second end having substantially the shape of a loop, an elastomer part being disposed between the loops of the two branches, characterized in that the elastomer part has a profile allowing it to substantially match the shape of the lateral groove of the insulator.

4 / ligature according to claim 3, characterized in that the elastomer part is formed by assembling several washers of different diameters.