| 摘要 |
A high pressure coupling for releasably coupling high pressure tubular elements in sealed relationship, the coupling comprising a first tubular member having a socket formation, a second tubular member having a spigot formation sealingly engaged with the socket formation in mating relationship therewith, one member having an annular recess and the other member having a radially directed annular bearing surface to cooperate with a locking sleeve, and a radially deformable locking sleeve positioned in the annular recess, the locking sleeve being located against radial deformation out of the recess by the bearing surface engaging with the bearing surface of the locking sleeve. The coupling further includes bias means operative between the tubular members to provide a predetermined bias force to restrain axial separation of the mated formations. The tubular members of the coupling are axially separable upon application of an axial separation force in excess of the predetermined bias force of the bias means for the bearing surface to disengage from the locking sleeve, and for the locking sleeve to be radially deformed out of the annular recess to release the member having the recess for the spigot formation to separate from the socket formation and permit automatic uncoupling of the coupling. The tubular members are further shaped to define an annular pressure balancing chamber which is in communication with the coupling bore. |
