Air leakage prevention device for fan pipeline

The utility model discloses a fan pipeline air leakage prevention device which is provided with a main body frame, a shell, an air inlet, a check valve plate, a sealing rubber layer and an air outlet, the check valve plate is arranged on the inner side of the air inlet and connected with the shell through a rotating shaft, and the sealing rubber layer is arranged on the inner surface of the check valve plate. The sealing performance of the check valve plate and the shell is effectively improved, air leakage is avoided, and the operation efficiency of the fan is improved. 本实用新型公开了一种风机管道防漏风装置，具有主体框架，壳体，入风口，止回阀板、密封橡胶层，出风口，由于在入风口内侧设置止回阀板，并与壳体通过转轴连接，止回阀板内表面上设置密封橡胶层，当风机供风时，有效的增加了止回阀板与壳体的密封性，避免了漏风，提高了风机运行效率。