Soft sealing device for reducing air leakage rate of air pre-heater

The utility model relates to the technical field of Lockg type air pre-heater systems, in particular to a soft sealing device for reducing the air leakage rate of an air pre-heater, which comprises a radial sealing fin, the radial sealing fin is fixed on a partition plate, a soft sealing fin is further fixed on the radial sealing fin, the soft sealing fin is fixed with the radial sealing fin through a pressing plate and a bolt, and the pressing plate is fixed on the partition plate. The top end of the radial sealing piece and the top end of the soft sealing piece are each of a bent structure, and after the soft sealing piece and the radial sealing piece are assembled, the top end of the soft sealing piece is higher than the top end of the radial sealing piece. When the sealing device rotates to the position of the fan-shaped plate, the soft sealing piece makes contact with the fan-shaped plate to form a tight and gapless sealing system, after the sealing device leaves the fan-shaped plate, the tail ends of th