Self-traction sealing device adaptive to pitching mechanism

The invention relates to a self-traction sealing device adaptive to a pitching mechanism. The self-traction sealing device adaptive to the pitching mechanism comprises a blanking groove, a sealing cover plate, a guide groove and support legs, wherein the lower end of the blanking groove is inserted into the sealing cover plate, and connected with the sealing cover plate through an arc-shaped flange at a waist part; a rail allowing the sealing cover plate to carry out reciprocating running is arranged at the upper end of the guide groove; a travelling wheel is arranged on the rail; the sealingcover plate is arranged on the travelling wheel; fixed pulleys are arranged at the two ends of the rail separately; a steel wire rope is wound on the rail; and the two ends of the steel wire rope areconnected with the two ends of the sealing cover plate around the fixed pulleys at the two ends of the rail separately. The self-traction sealing device adaptive to the pitching mechanism is simple instructure and convenient t