Airlocks, also known as feeders, rotary valve unloaders, etc., are key equipment in the force delivery system. The traditional impeller type air closing device has a complicated structure, high manufacturing cost, and large operating power consumption. After using to a certain extent, the gap cannot be adjusted, and the whole machine is scrapped. The maintenance of the reducer matched with the traditional impeller type air closing device also increases the use cost for the manufacturer. Therefore, it is imperative to develop and produce a wind deflector with good air tightness, low leakage, low energy consumption, wear resistance, long service life, low cost of use and moderate price to replace the traditional model, and it is also in line with China's current environmental protection and energy saving. Economic national policy.