| 摘要 |
PCT No. PCT/N087/00053 Sec. 371 Date Mar. 29, 1988 Sec. 102(e) Date Mar. 29, 1988 PCT Filed Jul. 7, 1987 PCT Pub. No. WO88/00308 PCT Pub. Date Jan. 14, 1988.A device for clamping and locking of cover (6) against a flange (7) for subsea installations, particularly in connection with production of oil and/or gas, and particularly for clamping and locking of a valve housing cover (6) against a flange (7) on a valve housing (9) which is coupled into a subsea pipeline (1). Mainly U-formed locking segments (4) are designed with a certain clearance, preferably approx. 3 mm, so that the distance between the opposite facing, parallel contact and sealing surfaces of the locking segment (4) exceeds the total thickness of the cover (6) and flange (7) . The internal pressure of the subsea installation (9) internal pressure is utilized to urge the cover (6) away from the flange (7) and against the adjacent contact and sealing surfaces of the locking segments (4), to that the locking segments thereby absorb the entire force from the internal pressure of the subsea installation, at the same time as the cover (6) thus is maintained in its position clamped against the flange (7) by means of the locking segments (4), as the cover (6) and flange (7) are designed with surfaces which are displaceable against each other and with a sealing device in between. |
