Full-passage self sealing butterfly type spherical valve

The utility model provides a full-passage butterfly type spherical valve, which comprises a valve body, an upper shaft, a lower shaft, a butterfly wing valve core, a wing frame and a floating sealing pair, wherein the butterfly wing valve core is arranged in a rotary casing in the valve body, and the wing frame is used for fixing the butterfly wing valve core. When the valve is opened for 90 degrees, the middle part of the butterfly wing valve core and the spherical wing frame are pasted at the inner side of the valve body, two ends of the butterfly wing valve core are pasted at the pipeline wall, an all-pass flow passage is formed by space side walls of pipelines, media realizes resistance-free circulation, the loss coefficient of a flow resistance water head can reach a value lower than 0.035, and good energy-saving benefits are realized. When the valve is closed, fluid generates greater pressure on the butterfly wing valve core, the butterfly wing valve core tightly presses the floating sealing pair, the s