Labyrinth type sandform sealing ignition chimney device of preheater

The utility model relates to a labyrinth type sandform sealing ignition chimney device of a preheater. The device comprises a valve body, a valve deck, guide rods, a steel support, pulley assemblies, a steel wire rope assembly and an electric actuator, wherein the valve body is provided with the four guide rods which penetrate through the valve deck, the valve body is connected with the valve deck through a labyrinth type sealing structure, a sealing groove of the labyrinth type sealing structure is filled with a proper amount of sand, the pulley assemblies are arranged on the steel support, the steel wire rope assembly is connected with the electric actuator through one pulley assembly, and the center point of the circular valve deck is fixedly connected with the steel wire rope assembly. The sealing groove in the upper portion of the valve body and a sealing ring on the lower portion of the valve deck are combined to form labyrinth type sandform seal, sealing performance is good, the four guide rods are fix