Groove butterfly valve with good sealing performance

The utility model belongs to the technical field of butterfly valves, and particularly relates to a groove butterfly valve with good sealing performance, which structurally comprises a valve body, two opposite ends of the valve body are respectively provided with a connecting pipe, an annular groove is arranged on the outer side of each connecting pipe, a valve cover is fixedly arranged at the top end of the valve body, and two ends of the top and the bottom of the valve cover are hermetically penetrated by a valve rod and extend into the inner side of the valve body. Grooves are symmetrically formed in the front end and the rear end of the butterfly plate in a rotating mode, the butterfly plate is arranged on the inner side of the valve body, the butterfly plate moves on the inner sides of the grooves, an attaching face for preventing the butterfly plate from rotating anticlockwise is arranged on the inner side of each groove, and a cushion layer is fixedly arranged on the inner side of each groove and movab