Sealing device of unloading crane pipe

The utility model belongs to the technical field of oil tank trucks, and particularly discloses a sealing device of an unloading crane pipe, which is characterized in that first connecting pieces are symmetrically arranged on two sides of a crane pipe body, connecting rods are arranged at two ends of each first connecting piece, first connecting blocks are arranged at the other ends of the connecting rods, and second connecting blocks are fixedly connected to one sides of the first connecting pieces; first auxiliary blocks are arranged at the ends, away from the first connecting piece, of the second connecting blocks, second connecting pieces are arranged at one ends of the first auxiliary blocks, second auxiliary blocks are arranged at the ends, away from the first auxiliary blocks, of the second connecting pieces, and limiting pieces are fixedly connected to the ends, away from the second connecting pieces, of the second auxiliary blocks; fixing pieces are symmetrically and fixedly connected to the two side