Centering mud jacking device of intelligent fish ball machine

The centering mud jacking device comprises an outer skin material pipe with an opening in the lower end, the side face of the outer skin material pipe is connected with a radial skin material inlet pipe, an inner guide pipe in the axial direction is fixed to the middle of the outer skin material pipe, the upper end and the lower end of the inner guide pipe are both open, the side face of the inner guide pipe is connected with a stuffing inlet pipe penetrating through the outer skin material pipe in the radial direction, and the stuffing inlet pipe is communicated with the stuffing inlet pipe. A mud jacking sleeve is sleeved with the inner guide pipe in an up-and-down sliding mode, a stuffing inlet matched with a discharging port of the stuffing inlet pipe is formed in the side wall of the mud jacking sleeve, a pressing rod sliding up and down is sleeved with the mud jacking sleeve, the lower end of the outer skin material pipe is rotationally connected with a hollow rotating head with the upper end and the lo