Heating fan for heating and sealing unbonded rib ring anchor heat-shrinkable sleeve

A heating fan for heating and sealing an unbonded rib ring anchor heat-shrinkable sleeve relates to an installation construction device of a pre-stressed anchorage device and comprises an air heater assembly, a transition pipe and N hot air branch pipes which are connected into a whole, N is larger than or equal to 2, and air blowing holes are evenly distributed in the inner walls of the hot air branch pipes. And a heating space for embedding a row of vertically arranged heat-shrinkable bushings is formed between every two adjacent hot air branch pipes. The interval size A between every two adjacent hot air branch pipes meets the condition that (N-1) * A + 2B + (N-2) * M is smaller than or equal to N * S1d, B is the thickness of the hot air branch pipes at the two ends, M is the thickness of the hot air branch pipe in the middle, S1 is the hole pitch of the annular unbonded ribs which are transversely arranged, and d is the maximum outer diameter of the part to be sealed. According to the utility model, each