This valve has a simple structure, flexible operation, light weight, and no blockage. It is particularly suitable for conveying and regulating the flow rate of various solid materials and block shaped and ball shaped materials with a diameter of about 50mm. Installation is not limited by angle, and operation is convenient. The opening can be adjusted at any time. This valve is a main control device for the flow or conveying of powder, granular, granular, and small block materials, widely used in industries such as metallurgy, mining, building materials, grain, and chemical to control flow changes or quickly cut off.