| 摘要 |
A coupling assembly includes a receiving tubular member (13) defining an opening (27) for receiving a first tubular member (12). The receiving tubular member has an inner portion defining an inner bore dimensioned to receive one end (68) of the first member, and an outer portion defining an internal annular cavity (22) intersecting the inner bore and projecting radially outwardly therefrom. The annular cavity (22) comprises an annular tapered wall portion (25) tapered radially inwardly and projecting longitudinally toward the opening (27), and a split lock ring (72) formed from spring material and disposed in the annular cavity between the first tubular member (12) and the receiving tubular member (13). The lock ring (72) has an outer circumferential surface portion adapted to engage the tapered wall portion (25), and an inner circumferential surface portion (73) adapted to engage an external wall portion of the first tubular member (12). The lock ring (72) is adapted to expand circumferentially into the annular cavity (22) during insertion of said first tubular member into the receiving tubular member, and to be compressed between the tapered wall portion and the external wall portion in response to relative longitudinal separating movement between the first tubular member and the receiving tubular member. The inner circumferential surface portion (73) of the lock ring defines first and second substantially parallel, spaced apart, circumferentially extending knife edges (76, 81). Also included is an annular sealing member (36) disposed in the annular cavity between the lock ring and the inner bore, the sealing member being dimensioned to be engaged between the first tubular member and the receiving tubular member. Under high pressure conditions both of the knife edges (76, 81) penetrate the external wall portion so as to prevent longitudinal movement of the first tubular member relative to the receiving tubular member. <IMAGE> |
