Sealing device for smoke outlet of shuttle kiln car

The utility model relates to a shuttle kiln car smoke outlet sealing device which comprises a smoke outlet arranged on a kiln car in a shuttle kiln body, an underground flue arranged below the kiln car, a square sealing concave table arranged on the kiln car on the outer side of the bottom of the smoke outlet, and a square mounting concave table arranged on the outer side of the top of the underground flue. A sealing square pipe arranged on the outer side of the upper portion of the underground flue in a sleeving mode is arranged above the installation concave table, a sealing piece is fixed to the top of the sealing square pipe, a sealing groove is formed in the installation concave table and filled with sealing quartz sand, and a lower sealing square plate arranged on the outer side of the upper portion of the underground flue in a sleeving mode is fixed to the bottom of the sealing square pipe. The lower portion of the lower sealing square plate is inserted into the sealing quartz sand, and the outer side