在细微粉和超微粉的筛分过程中，经常需要对其卸料装置进行锁风，锁风效果直接影响到设备中物料的运行情况．漏风严重时，设备甚至无法工作。笔者在实践中，设计了一种锁风卸料装置（如图1所示）。挡料板通过转轴与丝杆和重锤相连，重锤可以在丝杆上移动。物料由料仓下落到挡料 In the fine powder and ultrafine powder screening process, often need to unload the device to lock the wind, the wind lock effect directly affects the equipment operation of the material. When the air leak is severe, the device can not even work. In practice, I designed a wind-driven discharge device (shown in Figure 1). The material plate is connected with the screw rod and the hammer through the shaft, and the hammer can be moved on the screw rod. Material from the silo fell to the material