Anti-corrosion sealing flange butterfly valve

The utility model relates to the technical field of butterfly valves, in particular to a corrosion-resistant sealing flange butterfly valve which is composed of a shell, a linkage structure and a sealing structure, the linkage structure is installed on the shell, and the sealing structure is installed at the joint of the linkage structure and an inner cavity of the shell. The linkage structure comprises a rotating wheel, a fixing shaft and a linkage shaft, the sealing structure comprises a dish plate, the dish plate is fixedly connected with the linkage shaft, the contact position of the inner wall of the pipeline and the dish plate is coated with an inner anti-rust layer, and the position, not in contact with the dish plate, of the inner wall of the pipeline is coated with an outer anti-rust layer. According to the anti-rust butterfly valve, the anti-rust original part mixing mode is adopted to achieve the purpose that the butterfly valve cannot be corroded in the using process, meanwhile, the overlook rusti