Multi-stage barrel manufacturing process of heat exchanger

The invention relates to the technical field of heat exchangers, in particular to a multi-stage barrel manufacturing process of a heat exchanger. A heat exchanger barrel comprises an outer barrel, a cover plate, a bottom frame, a first inner connecting pipe and a heat conducting pipe, the cover plate is mounted at the front end of the outer barrel through bolts, first through holes are uniformly formed in the surface of the cover plate, and second through holes are formed in the periphery of the cover plate; and a water inlet pipe is fixed to the tail end of the outer barrel through bolts, the bottom frame is installed on the outer side of the outer barrel, a middle frame is movably installed above the bottom frame, a top frame is arranged above the middle frame, the inner connecting pipe is installed in the outer barrel, and a sliding groove is formed in the surface of the cover plate. The heat exchanger barrel has the beneficial effects that the multi-stage barrel manufacturing process of the heat exchanger