Flanged ball valve with good sealing performance

The utility model discloses a flanged ball valve with good sealing performance. The flange ball valve comprises a flange ball valve body and flange plates, sleeves are fixedly connected to the sides,away from each other, of the two flange plates correspondingly. A groove is formed in the surface of the sleeve; a sliding plate is slidably connected between the two sides of the inner wall of the groove. Extrusion springs are fixedly connected to the two sides of the bottom of the sliding plate. The ends, away from the sliding plate, of the two extrusion springs are fixedly connected with the bottom of the inner wall of the groove, the top of the sliding plate is fixedly connected with a sealing gasket, and the opposite sides of the two flange plates are fixedly connected with supporting rods. According to the flange ball valve, the sealing gasket and the sealing ring are completely attached to the inner wall of a pipeline through elastic force of the extrusion spring and the sealing ring, so that sealing of the