Pipe coupling member for high-pressure fluid

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

Patent

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Details

F16L 37/23 (2006.01) F16L 37/44 (2006.01)

Patent

CA 2681304

A pipe joint member for high-pressure fluid such as liquefied hydrogen includes a seal ring having a highly effective sealing function to prevent leakage of the fluid. The seal ring (72) is set in a seal ring setting space (39) defined by a second radial surface (36) and a seal ring setting surface (38) of a first tubular member (20), a forward end surface of a second tubular member (22), and the outer peripheral surface of a valve seat member (24). A forward end portion of the second tubular member (22) is provided with a communication hole (84) radially penetrating the forward end portion. The pressure of the high-pressure fluid on the downstream side of a valve seat surface (52) causes a fluid path in the second tubular member to be communicated with the sealing ring setting surface (39) via the communication hole (84) and via a gap between the seal ring setting surface (38) and the outer peripheral surface of the forward end portion of the second tubular member.

La présente invention concerne un élément de joint de tuyau destiné à un fluide à haute pression tel qu'un hydrogène liquéfié, qui comporte une bague étanche ayant une fonction d'étanchéité hautement efficace pour empêcher la fuite du fluide. La bague étanche (72) est réglée dans un espace (39) de réglage de bague étanche défini par une seconde surface radiale (36) et une surface (38) de réglage de bague étanche d'un premier élément tubulaire (20), une surface d'extrémité avant d'un second élément tubulaire (22), et la surface périphérique externe d'un élément (24) de siège de soupape. Une partie d'extrémité avant du second élément tubulaire (22) est munie d'un trou (84) de communication pénétrant radialement dans la partie d'extrémité avant. La pression du fluide à haute pression sur le côté en aval d'une surface (52) de siège de soupape amène une trajectoire fluidique dans le second élément tubulaire à être communiquée avec la surface (39) de réglage de bague étanche par le trou (84) de communication et par un écart entre la surface (38) de réglage de bague étanche et la surface périphérique externe de la partie d'extrémité avant du second élément tubulaire.

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