Efficient heat transfer vertical pipe expander

The utility model discloses an efficient heat transfer vertical pipe expander which comprises a supporting table, supporting frames and moving rods, the supporting frames are fixed to the two sides of the top end of the supporting table, telescopic air cylinders are installed at the top ends of the supporting frames, the moving rods are installed at the top ends in the supporting frames, and pipe expanders are installed at the bottom ends of the moving rods. And protection structures are installed on the two sides of the bottom end of the pipe expander and comprise guide grooves, rubber blocks, guide rods and springs, the springs are installed on the two sides of the bottom end of the pipe expander, the rubber blocks are installed at the bottom ends of the springs, the guide rods are arranged in the springs, and the guide grooves are formed in the top ends of the two sides in the fixing table. Through the arrangement of the protection structure, when the pipe expander moves, the guide rod can move along with