Mechanical crushing device for heavy calcium carbonate filler

The utility model relates to a ground calcium carbonate filler mechanical pulverization device, which comprises a barrel body and a barrel cover, a central rod is rotatably arranged in the barrel body, a plurality of layers of pulverization rings are coaxially and detachably mounted on the central rod, each pulverization ring comprises a ring body and a plurality of pulverization support rods fixed along the radial direction of the ring body, the smashing supporting rods on each layer of smashing rings and the smashing supporting rods on the adjacent layer of smashing rings are arranged in a staggered mode, the multiple smashing rings are sequentially installed on the center rod in a staggered mode from bottom to top, when the center rod rotates, the center rod drives the smashing rings to rotate synchronously, and therefore the smashing rings can be smashed. The crushing supporting rods on the lowest layer and the crushing supporting rods on the upper layer are arranged in a staggered manner to integrally fo