With several fan-shaped filter disks, which may overturn unloaded materials, installed on the annular internal and external frames, and can be connected with the defect air disk located in the center of the internal frame.

• 由若干个可倾翻卸料的扇形过滤盘，安置在环形内外框架上，并与位于内框架中心的错气盘连接而成。