Automatic hydraulic clamp mechanism

The invention discloses an automatic hydraulic clamp mechanism which comprises a centering and righting mechanism which is arranged to move in the direction of pipe columns so as to clamp a lower pipe column, and after the centering and righting mechanism clamps the lower pipe column, the centering and righting mechanism and an upper pipe column hoisted over the centering and righting mechanism are centered, and primary butt joint of the two pipe columns is completed; the automatic hydraulic clamp main body is also arranged to move towards the tubular column and does not interfere with the centering and righting mechanism, and the automatic hydraulic clamp main body is provided with a clamping mechanism used for driving the automatic hydraulic clamp main body to clamp the tubular column and a power mechanism used for driving the automatic hydraulic clamp main body to rotate and changing the steering direction. And the automatic hydraulic tong main body is used for carrying out screwing-on and screwing-off ope