Novel wood chip pre-cooking cylinder

The utility model discloses a novel wood chip pre-cooking cylinder which mainly comprises a pre-cooking cylinder body, an adjustable-speed motor, a speed reducer, a reverse screw, a forward screw and a primary conical bottom, a secondary conical bottom is arranged at the bottom of the pre-cooking cylinder body; the primary conical bottom is mounted in the pre-cooking cylinder body and divides an inner cavity of the pre-cooking cylinder body into a pre-cooking chamber and a feeding chamber; the adjustable-speed motor and the speed reducer are mounted at the top of the pre-cooking cylinder body; the reverse screw and the forward screw are mounted in the pre-cooking chamber, the top end of the reverse screw is connected with an output rotating shaft of the speed reducer, and the bottom end of the reverse screw is rigidly connected with the top end of the forward screw; and the bottom end of the forward spiral extends to a bottom outlet of the first-stage conical bottom. The novel pre-cooking cylinder structure i