Anti-deformation preheating mechanism of heavy metal ion recovery crystallizer

The utility model relates to a heavy metal ion recovery crystallizer anti-deformation preheating mechanism which comprises a box body, a heating assembly is arranged on the left side of the box body, a limiting assembly is arranged in the box body, the limiting assembly comprises four rotating rods rotationally installed on the inner wall of the box body, and a U-shaped plate is fixedly installed at the other end of each rotating rod. The left side and the right side of the U-shaped plate are each rotationally provided with a rotating cylinder, a moving block is installed on the inner wall of each rotating cylinder in a threaded mode, a movable rod extending to the position between the two side walls of the U-shaped plate is fixedly installed on one side of each moving block, a limiting plate is fixedly installed on the other side of each movable rod, and an anti-skid pad is fixedly installed on the other side of each limiting plate; and gear rings are fixedly mounted on the surfaces of the two rotating rods