A flexible pipe with an associated end-fitting

Details A flexible pipe with an associated end-fitting A flexible pipe with an associated end-fitting

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 33/01 (2006.01)

Patent

CA 2306494

A flexible pressure pipe (1), with an associated end-fitting (9) having an axially extending through opening (14), is of a non-bonded structure comprising a number of layers (2, 3, 4, 5, 7) including an extruded polymer inner lining (3) extending into the through opening (14). In the outer surface of the end part of the inner lining two annular grooves (23) are formed by rolling and two opposing grooves (28) are formed in the inner surface of the lock ring (27). By fitting two circlips (29) into both the grooves (23) in the inner lining (3) and in the lock ring (27), the latter is attached to the lining (3), whereafter the lock ring (27) is fitted into a holding groove (17) in the wall of the through opening (14) of the end-fitting (9). The joint between the inner lining (3) of the flexible pressure pipe (1) and the end- fitting (9) is a simple and cheap structure and provides a greater resistance to axial tensile loads acting on the inner lining (3) than has been know before.

L'invention concerne un tuyau souple sous pression (1) doté d'un raccord d'extrémité (9) ayant un orifice traversant (14) s'étendant axialement. Ledit tuyau présente une structure non liée comprenant plusieurs couches (2, 3, 4, 5, 7) comportant un revêtement intérieur en polymère extrudé (3) s'étendant dans l'orifice traversant (14). Dans la surface extérieure de la partie d'extrémité du revêtement intérieur, deux rainures annulaires (23) sont formées par laminage et deux rainures opposées (28) sont formées dans la surface intérieure de l'anneau de blocage (27). La mise en place de deux clips circulaires (29) à la fois dans les rainures (23) du revêtement intérieur (3) et celles de l'anneau de blocage (27), permet de fixer ce dernier au revêtement (3), après quoi l'anneau de blocage (27) est logé dans la rainure de maintien (17) de la paroi de l'orifice traversant (14) du raccord d'extrémité (9). Le joint entre le revêtement intérieur (3) du tuyau souple sous pression (1) et le raccord d'extrémité (9) est une structure simple et bon marché et confère une résistance plus élevée aux efforts de tension axiaux agissant sur le revêtement intérieur (3).

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