Device for assembling fan impeller in narrow field

The utility model discloses a narrow site fan impeller assembling device which comprises an assembling foundation, a fixing ring is integrally poured on the top face of the assembling foundation, and a built-in ring is welded to the inner ring of the fixing ring. According to the utility model, the splicing transition part is close to the fixing ring of the splicing foundation, so that the plurality of connecting strips welded at the lower part of the splicing transition part are all embedded into the mounting grooves formed in the surface of the built-in ring, and then the hexagonal bolts penetrate through the connecting strips and are in threaded connection with the threaded grooves formed in the inner side surfaces of the mounting grooves; the fixing ring is arranged on the connecting strip, so that the part of the splicing transition part is embedded in the fixing ring, then the U-shaped bolt is connected with the mounting hole formed in the fixing ring in an inserted mode, the nut is connected with the t