The utility model relates to the technical field of negative-pressure screen analysis instruments, and discloses a
cement fineness negative-pressure screen analysis instrument for wallboard production, which comprises a box shell, a screen seat is arranged at the upper end of the box shell, a driving motor is fixedly mounted in an opening at the upper end of the box shell, and a
cam is mounted at the driving end of the driving motor. A
barrel type
dust collector is arranged in the box body shell, the screen seat comprises a second connecting
flange, a connecting ring is fixedly installed in the second connecting
flange, a circle of threaded groove is formed in the inner wall of the connecting ring, a filter disc is rotatably installed on the inner wall of the connecting ring, and a limiting ball is fixedly installed on the outer wall of the filter disc; the driving motor drives the
cam to push the filter disc to rotate and ascend along the threaded groove, slight vibration is generated at the same time,
cement particles are evenly distributed on the screen surface, the particles can be dispersed to prevent the screen from being blocked, and through the synergistic effect of negative pressure screening and mechanical linkage, the screening uniformity and the screening efficiency are improved.