Pipe connector for cryogenic use

F - Mech Eng,Light,Heat,Weapons – 16 – L

Patent

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Details

F16L 39/00 (2006.01) F16L 29/00 (2006.01) F16L 37/30 (2006.01) F16L 37/56 (2006.01) F16L 59/14 (2006.01) F16L 59/16 (2006.01)

Patent

CA 2501471

A connector for piping destined to the transfer of fluid at very low temperature, in particular liquefied natural gas is described. The coupling comprises a first and a second length of piping (8, 9) that are provided with respective closing valves (20, 27) and destined to be fastened, respectively, to a piping (2) for the inflow of the fluid and to a piping (6) for the receiving of the fluid. Onto the second length of piping (9) a quick~ coupling mechanism (34) is mounted that comprises a circumferential sequence of jaws (36) that are suitable to provide a firm front coupling between terminal flanges (12, 17) of the two lengths of piping (8, 9), and means (35 38) for the driving of the jaws. Each one of said lengths of piping (8, 9) is surrounded by an external coating band (23, 30) that defines with said length of piping a thermally insulating interspace (25, 32). The two coating bands (23, 30) are passed through by respective mechanisms (22, 29) for the transmission of the motion to said closing valves (20, 27) and the coating band (30) of the second length of piping (9) serves as a support for said quick-coupling mechanism (34).

L'invention concerne un raccord de tuyauterie conçu pour le transfert de fluide à très basses températures, en particulier le gaz naturel liquéfié. Le couplage comprend une première et une seconde longueur de tuyauterie (8, 9) dotées de soupapes de fermeture (20, 27) correspondantes et destinées à être fixées respectivement à une tuyauterie (2) pour l'admission du fluide et à une autre (6) pour la réception dudit fluide. Sur la seconde longueur de tuyauterie (9) est monté un dispositif de couplage rapide (34) qui comprend une série circonférentielle de mâchoires (36) conçue pour produire un couplage avant solide entre les brides terminales (12, 17) des deux longueurs de tuyauterie (8, 9) et des moyens (35, 38) de commande des mâchoires. Chacune des longueurs de tuyauterie (8, 9) est enveloppée dans une bande de revêtement extérieure (23, 30) qui définit avec ladite longueur de tuyauterie un intervalle isolant thermique (25, 32). Les deux bandes de revêtement (23, 30) sont traversées par des dispositifs correspondants (22, 29) pour la transmission du mouvement auxdites soupapes de fermeture (20, 27), la bande de revêtement (30) de la seconde longueur de tuyauterie (9) servant d'appui au dispositif de couplage rapide (34).

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