Super-zero high-temperature and high-pressure stop valve

The utility model discloses a super-zero high-temperature and high-pressure stop valve which comprises a valve body. The main valve clack is arranged on the bottom side in the valve body; the auxiliary valve clack is arranged at the top of the main valve clack; the valve rod penetrates through the interior of the valve body, and the outer side of the top of the valve rod is of a sawtooth-shaped structure; the top of the hand wheel is in transmission connection with the hand wheel through a gear; the valve rod is fixedly connected with the bracket through the valve rod nut; the support is fixedly installed at the top of the valve body through a screw rod, a valve clack gland is installed on the inner side of the top of the auxiliary valve clack, and a valve rod is tightly attached to the inner side of the valve clack gland; the bottom end of the valve rod is connected to the inner side of the auxiliary valve clack in a clamped mode, and a self-sealing valve deck is arranged in the valve body. The super-zero-bo