Filter switching device and switching method for welding pool imaging

The filter switching device for welding pool imaging comprises a filter storage box body and is characterized in that a lead screw is rotationally installed on the inner wall of the filter storage box body, a motor is fixedly installed at the top of the filter storage box body through welding, and an output shaft of the motor is connected with the lead screw through a coupler; the exterior of the lead screw is in threaded connection with a nut seat, a suction pipe is fixed to one side of the nut seat through welding, a linear guide rail is fixed to one side of the filter storage box body through welding, the exterior of the linear guide rail is in sliding sleeve connection with a sliding block, and one side of the sliding block is fixed to the suction pipe through a bolt; a draught fan is installed at the top of the filter storage box body, the top end of the suction pipe is connected with a suction air cylinder in a penetrating mode through welding, the output end of the suction air cylinder is communicated