Corrosion-resistant anti-scouring special alloy plug valve

The utility model discloses a corrosion-resistant anti-scouring special alloy plug valve which comprises a valve body, flange plates fixedly connected to the left side and the right side of the valve body, a plug cock arranged in the middle of an inner cavity of the valve body, a sealing ring arranged on the outer wall of the upper portion of the plug cock, a packing gland arranged on the outer wall of the sealing ring, and a valve deck arranged above the packing gland. The valve rod is arranged above the valve cover, the fixing rings are arranged on the left side and the right side of the plug cock, the movable balls are connected to the outer walls of the fixing rings in a sleeved mode, the fixing rod is fixedly connected to the inner wall of the valve body, the bottom plate is arranged below the plug cock, and the pressure-resistant mechanism is arranged on the outer wall of the valve body. When the cock is opened or closed, the inertia of the fluid enables the internal pressure to be increased, and the fl