Pneumatic stirring device

The utility model relates to a pneumatic stirring device and belongs to the field of stirring and mixing devices. The non-return device comprises an air supply pipe and an air distribution pipe, the air distribution pipe is composed of an annular pipe and a branch pipe communicated with the annular pipe, and the non-return device is characterized in that a non-return structure is arranged at the outlet end of the branch pipe and composed of a first magnetic part and a second magnetic part which have magnetism and can be attracted together. The first magnetic part is of an internally-through annular structure and communicates with the end of the branch pipe. The upper end edges of the first magnetic part and the second magnetic part are connected in a hinged mode, and when the second magnetic part and the first magnetic part are attracted together, the second magnetic part closes the end, away from the branch pipe, of the first magnetic part. The utility model aims to solve the technical problem of providing a