| 摘要 |
PCT No. PCT/NO95/00089 Sec. 371 Date Dec. 5, 1996 Sec. 102(e) Date Dec. 5, 1996 PCT Filed Jun. 1, 1995 PCT Pub. No. WO95/33912 PCT Pub. Date Dec. 14, 1995A hydraulically or pneumatically releasable disconnecting device (1), through which a liquid can flow, and wherein two end pieces (2, 3) are connected in that an expandable locking ring (20) in normal position engages grooves (23) in a locking sleeve (10). An axially displaceable locking sleeve (6) surrounds the locking ring (20) with one end thereof and prevents the locking ring (20) from expanding and disengage the grooves (23). The locking sleeve (6) is fixed with shear pins (7). When the disconnecting device (1) is to be released, a sealing body (14) is placed in a seat (13) in a piston sleeve (12), preventing flow of liquid therethrough. Hydraulic force acting against the sealing body (14) and the piston sleeve (12), urges the piston sleeve (12) against the safety sleeve (6) such that the shear pins (7) are broken. Thus, the safety sleeve (6) is displaced such that it can no longer surround the locking ring (20). The grooves (23) are provided with inclined flanks, and the axial force against the locking ring (20) gives a resultant radial force causing the locking ring (20) to expand and disengage the grooves (23) in the locking sleeve (10).
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