Ceramic hard sealing high-temperature ball valve

The utility model discloses a ceramic hard sealing high-temperature ball valve, which belongs to the field of ball valves and comprises a valve body, flanges are fixedly connected to ports on two sides of the valve body, a ceramic ball body is rotatably arranged in the valve body, a valve rod is connected onto the ceramic ball body, and the valve rod extends upwards out of the valve body and is connected with a worm wheel. Through the arrangement of the protection ring, when the flange of the pipeline is inserted into the protection ring, the movable clamping head on the protection ring can be squeezed into the corresponding mounting cylinder by the flange of the pipeline, and after the flange of the pipeline is completely inserted into the protection ring, the protection ring can be exposed again under the elastic force action of the spring and clamps the flange of the pipeline, so that the flange of the pipeline is prevented from being damaged. After the flange and the flange of the pipeline are fixed toget