Hydrogen transmission pipeline internal crack detection equipment

The invention belongs to the technical field of pipeline detection, and particularly relates to hydrogen transmission pipeline internal crack detection equipment which comprises a base, an advancing plate and a pushing plate, the base and the advancing plate are jointly and fixedly connected with a hollow column, and a stainless steel hose is fixedly connected between the base and the pushing plate. The advancing plate, the base and the pushing plate are jointly provided with a moving mechanism, a plurality of impact heads are distributed on the side wall of the base in a surrounding mode, a plurality of sets of circular grooves corresponding to the positions of the impact heads are formed in the side wall of the base, and each set of circular grooves and the corresponding impact head are jointly provided with a magnetic attraction sound production mechanism. Whether cracks exist in the hydrogen conveying pipeline or not can be detected on the basis of the characteristic that the cracks block normal sound pro