Single and two-way spiral gates (one-way spiral gates, two-way spiral gates) are the main control equipment for the flow and conveying volume of powder, crystal particles, granular materials, and small materials. Spiral gates (one-way spiral gates, two-way spiral gates) are widely used in the top, bottom, and feeding ports of metallurgical, mining, building materials, grain, chemical and other industries. They are ideal equipment for controlling large flow changes, frequent opening and closing, and fast cutting.