Pipe penetrating auxiliary device

The utility model discloses a pipe penetrating auxiliary device which comprises an auxiliary pipe, at least two movable parts hinged to the auxiliary pipe and a push rod arranged in the auxiliary pipe, each movable part has an outwards-unfolded state and an inwards-retracted state, when the movable parts are in the unfolded state, the outer sides of the movable parts protrude out of the periphery of the auxiliary pipe, and when the movable parts are in the retracted state, the outer sides of the movable parts protrude out of the periphery of the auxiliary pipe. The pushing rod slides in the auxiliary pipe in a reciprocating mode so that the movable part can be switched between the unfolding state and the retracting state back and forth. The mounting efficiency of the heat exchange tube is improved, and the production efficiency of the heat exchanger is improved; moreover, the heat exchange tube can be corrected in the process that the auxiliary tube extends into the heat exchange tube, so that one end of the