Grinding and filtering structure of ultra-large anti-blocking sand mill and mounting bracket of grinding and filtering structure

The utility model relates to the technical field of sand mills, in particular to a grinding and filtering structure of an ultra-large anti-blocking sand mill and a mounting bracket of the grinding and filtering structure. Comprising a rack, a bearing seat, a motor and a sand mill, three supporting rods are fixedly installed on the front face and the back of the left side of the upper portion of the rack at equal intervals, a supporting plate is fixedly installed at the tops of the supporting rods, and the motor is installed on the supporting plate and is in transmission connection with the sand mill through the bearing seat; the sand mill comprises a shell, a feeding pipe, a bead adding opening, a rotor, a screen, a screen support and a discharging pipe, the feeding pipe and the bead adding opening are installed on the shell, the rotor is installed in the shell, the screen is arranged in the rotor, the screen support is arranged in the screen, and the discharging pipe is arranged at the bottom of an inner cav