F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 9/18 (2006.01) F16L 33/00 (2006.01)
Patent
CA 2350554
A service riser (10) comprises a steel jacket (11) around a polyethylene pipe (12) which terminates in the riser at a transition zone (20). The transition zone (20) comprises a retainer sleeve (30) inserted in the end of the pipe (12) and sealed thereto by an O-ring (38). The retainer sleeve (30) extends out of the pipe (12) and is provided with grooves (46) separated by lands (48) on which an elastomeric sealing band (52) is received. The tube (11) is swaged down forming a swage groove (56) around the retainer sleeve (30) compressing the gasket (52) to a large extent over the lands (48) and a lesser extent over the grooves (46), the ideal compression for the gasket (52) being arranged somewhere between such degrees of compression. By this means the ideal degree of compression at some regions of the gasket (52), forming an annulus around the retainer sleeve (30), is guaranteed, despite tolerances in the dimensions of the tube (11) (especially) as well as the band (52) and sleeve (30).
L'invention porte sur un tube ascenseur de service (10) comportant une gaine d'acier (11) entourant un tube de polyéthylène (12) finissant dans une zone de transition du tube (20) laquelle (20) comprend un manchon (30) inséré dans l'extrémité du tube (12) à laquelle il est fixé par l'intermédiaire d'un joint torique (38). Le manchon de retenue (30), qui s'étend hors du tube, est muni de rainures (46) séparées par des méplats (48) où vient se loger une bande d'étanchéité (52) d'élastomère. Le tube (11) est embouti vers le bas de manière à former une rainure emboutie (56) autour du manchon (30) qui comprime le joint (52) dans une large mesure vers les méplats et dans une moindre mesure sur les rainures (46). La compression idéale du joint (52) se situant entre ces deux niveaux de compression. On garantie ainsi un niveau idéal de compression dans le joint formant un anneau autour du manchon de compression, indépendamment des tolérances sur les dimensions du tube (11) (en particulier), mais aussi de celles de la bande d'étanchéité (52) et du manchon (30).
Sim & Mcburney
Uponor Innovation Ab
Uspoly Company
LandOfFree
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