Metal fitting for composite insulators

Details Metal fitting for composite insulators Metal fitting for composite insulators

H - Electricity

01

B

H01B 17/38 (2006.01) H01B 17/40 (2006.01)

Patent

CA 2119834

A metal fitting for a composite electrical insulator (1) including a plastic rod (2), e.g., an FRP rod. The metal fitting (4) includes a radially inwardly deformable sleeve portion having a bore (5) into which an end portion of the rod (1) can be inserted for fixedly securing the metal fitting (4) to the rod (1). The bore (5) in the metal fitting (4) has an inner surface which is formed with fine protrusions (7). These protrusions (7) provides a satisfactory resistivity to the tensile force applied to the insulator (1), to thereby effectively prevent withdrawal of the rod (2) from the metal fitting (4) when it is in use.

La présente invention vise un raccord métallique pour isolateur électrique composite (1) comprenant une tige de plastique (2), une tige de plastique renforcé de fibre de verre, par exemple. Le raccord métallique (4) comprend un manchon à déformation radiale intérieure dont l'alésage (5) peut recevoir l'extrémité de la tige (1) en vue d'y fixer solidement le raccord métallique (4). La surface intérieure de l'alésage (5) du raccord métallique (4) comporte de fines saillies (7), lesquelles assurent une résistivité satisfaisante à l'effort de traction appliquée à l'isolateur (1) pour ainsi empêcher la tige (2) de se désolidariser du raccord métallique (4) pendant l'utilisation.

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