Eccentric butterfly valve

The utility model discloses an eccentric butterfly valve which comprises a valve body, a valve sheet, a rotating shaft and a handle, wherein, the rotating shaft is installed on the valve body, the upper end of the rotating shaft is fixed with the handle, and the valve sheet is fixedly installed on the lower part of the rotating shaft and arranged in the valve body. The utility model is characterized in that the surface of a cavity hole of the valve body is provided with a limit stop, the upper part of the valve body is fixed with a projection for ensuring the valve sheet is free from the influence of the flow of liquid after opened, the projection is horizontally and movably provided with rollers and roller compressing springs, the handle is provided with an arc face contacted with the rollers at the end near the projection, and the arc face is provided with an arc groove which forms an angle of 90 DEG with the horizontal direction mutually. Compared with the prior art, the utility model ensures the accuracy of the closing position from the structure and eliminates the error brought by assembly techniques. The projection at the upper end of the valve body is a main position, the arc groove of the handle and the rollers are accessory positions, and therefore, the valve sheet face can be abutted against the positions without leaving; meanwhile, the valve sheet passes through the arc groove and the rollers with accurate positions when opened and is not influenced by the flow of liquid, and the opening reliability is ensured.