Full-bore bidirectional sealing C-shaped ball valve

The full-bore bidirectional sealing C-shaped ball valve comprises a valve body, a valve cover, a driving device, a valve rod, a ball body and a valve seat, a first mounting groove is formed in the valve body, and the valve seat is mounted on the first mounting groove and used for being in sealing fit with the ball body when the valve is closed; the ball valve further comprises a two-way sealing assembly, a supporting ring, a wave spring and a belleville spring, the valve seat is installed on the first installation groove in a floating mode in the axial direction, a sealing groove is formed in the outer circle face of the end, away from the ball body, of the valve seat, and the belleville spring is arranged on the inner end face of the first installation groove and acts on the supporting ring. A second installation groove is further formed in the inner circle face of the first installation groove, a limiting flange is arranged on the outer circle face of the valve seat, and the wave spring is arranged in the s