Compression self-locking mechanism for butt joint of deep sea operation tools

The invention belongs to the field of underwater robots, and particularly relates to a pressing self-locking mechanism for butt joint of deep sea operation tools, and the pressing self-locking mechanism is characterized in that a plurality of hydraulic linear cylinders are distributed in the circumferential direction of a fixed part; one end of the push-pull connecting rod is hinged to a piston rod of the hydraulic linear cylinder, and the other end of the push-pull connecting rod is hinged to the long shaft A. The long shaft A slides in a strip-shaped groove of the locking piece and a strip-shaped groove of the connecting rod fixing piece at the same time. The locking piece is hinged to the connecting rod fixing piece, one end of the pressing hook is hinged to the locking piece, and the other end of the pressing hook is hook-shaped; the long shaft C is hinged to the connecting rod fixing piece and slides in a strip-shaped groove of the pressing hook; when the piston rod stretches out, the pressing hook stret