Jack type clamp ring structure

The utility model discloses a jack type clamp ring structure which comprises clamps and a lock catch structure, at least two sections of arc-shaped clamps are fixed on the inner wall of an elastic steel ring end to end at intervals, the lock catch structure comprises hinge seats and lock catch shells, the hinge seats and the lock catch shells are fixed at the two ends of the elastic steel ring respectively, and rotating shafts are installed on the hinge seats. A fine adjustment bolt is fixed at one end of the connecting arc plate, the other end of the connecting arc plate is inserted into and penetrates through the lock catch shell, the fine adjustment bolt penetrates through the rotating shaft and is fastened by a nut, positioning holes are formed in the connecting arc plate at intervals, the lock handle is longitudinally installed in the lock catch shell, and the spring is compressed between the lock catch shell and the lock handle. And the lower end of the lock handle penetrates through any positioning hol