Helical tooth grading impeller

The utility model discloses a helical-tooth grading impeller which comprises a crushing disc, a helical-tooth grading blade, a helical-tooth grading blade and a helical-tooth grading blade, and is characterized in that the crushing disc is mounted in a crushing cavity; the impeller body is mounted at the top of the crushing disc, and the impeller body is inserted into the outer side of the top of the crushing disc through the mounting hole; the impeller body is fixedly connected with the smashing disc through bolts, smashing blades are arranged at the top of the impeller body at equal angles, and the smashing blades are in a straight blade shape. Wherein the crushing blades are obliquely and uniformly distributed, the adjustable range of the inclination angle of the crushing blades is 1-50 degrees, the inner sides of the tops of the crushing blades are fixedly connected with positioning strips, the positioning strips are of annular structures, and gaps are reserved between the crushing blade monomers. Accordi