is the displacement type measuring feeding equipment, which could evenly and continuously feed to next step and bear superior pressure of storage. As the feeding equipment of fine powder, it is suitable for feeding the non-viscous powder type, stuff or small chips such as that of coal powder, cement, clinker, limestone, shale, coal gangue and clay. And it is widely used for casting workshop of Golden Separating Factory, Coal Mining Factory and chemical factory, basic construction and mechanical factory to feed and batch the material continuously, evenly. The structure of this machine is very simple, easy to adjust and the performance is better. So it is suitable for feeding the powder with a diameter less than 50mm, and not suitable for conveying the viscous, immobilized material or those with particularly good liquidity.