Suspended sand seal tank with self-closing function

The utility model discloses a suspension type sand seal groove with a self-closing function, which relates to the technical field of tunnel kilns and comprises L-shaped steel, a fixed connecting rod is arranged at the lower end of the L-shaped steel, the lower end of the fixed connecting rod is connected onto a kiln seat, and the upper end of the fixed connecting rod is flexibly connected with the lower end of the L-shaped steel through a spring bearing sleeve; a torsional spring self-locking piece is arranged on the side, close to the kiln side wall, of the L-shaped steel. According to the utility model, the original hard connection of the sand seal groove is changed into spring bearing flexible connection, so that the impact on the sand seal groove caused by deformation of the sealing plate of the kiln car due to high temperature in a long-term operation process can be reduced, and the service life of the sand seal groove is prolonged; after the spring is additionally arranged, the sand seal groove has cert