Low-resistance high-pressure double-eccentric butterfly valve

The invention discloses a low-resistance high-pressure double-eccentric butterfly valve. The low-resistance high-pressure double-eccentric butterfly valve comprises a valve body, a valve plate, an upper rotation shaft, a lower rotation shaft, a bottom end cover, a sealing structure and a pressing plate; the valve plate is of an integrated hollow structure, supporting columns and inner ribs are arranged in the valve plate, the two faces of the valve plate are in a cambered surface design manner, the inner ribs are arranged on the inner wall of the valve plate and arranged along the cambered surfaces of the valve plate, the supporting columns are arranged in the valve plate, and the two ends of the supporting columns are fixedly connected to the opposite inner walls of the valve plate; the upper rotation shaft and the lower rotation shaft are fixedly connected with the valve plate through multiple cylindrical pins; and the sealing structure is arranged on the upper side of the interior of the valve body. According to the low-resistance high-pressure double-eccentric butterfly valve, the valve plate is the integrated hollow valve plate, and the resistance of a medium is reduced through the cambered-surface valve plate appearance design; through the design of the supporting columns and the inner ribs, the strength of the valve plate is improved, and the nominal pressure of the valve can reach PN25; and stem shaft design of the valve is achieved through a sealing sleeve between the upper and lower shafts and the valve body and the valve plate, and the medium can not enter the interiors of the valve body and the valve plate.