Self-cleaning frequency conversion fan for steam extraction of arc-shaped section of continuous casting machine

The utility model relates to a continuous casting machine arc-shaped section steam extraction self-cleaning frequency conversion fan, and belongs to the field of fans. A main flow channel is formed in a rotating shaft of the fan in the axial direction of the rotating shaft, the end, located outside a machine shell, of the main flow channel is connected with an external water supply device through a first water pipe, and the end, located in the machine shell, of the main flow channel is connected with a plurality of branch flow channels; each branch flow channel is connected with a sprayer through a second water pipe, each second water pipe is provided with an electromagnetic switch valve, the electromagnetic switch valves and the external water supply device are connected with the controller, the multiple sprayers and the multiple blades are arranged alternately, and water spraying openings of the multiple sprayers face the front edges of the multiple blades correspondingly. The fan works at low frequency, th