Box occupying type bird nesting preventing device for transformer substation metal beam

The invention provides a box occupying type bird nesting preventing device for a transformer substation metal beam. The device comprises occupying boxes and U-shaped lock catches for fixing the occupying boxes. Each occupying box is of a triangular prism structure, wherein the triangular prism is formed by splicing two front and rear triangular plates and three side rectangular plates, round through holes are formed in the triangular plates, kidney-shaped through holes are formed in the rectangular plates, splicing fixing holes are formed in the peripheries of the triangular plates and the rectangular plates, and the splicing fixing mode is bolt fastening. The occupying boxes are installed at the two ends and the middle position of the metal beam and fixed to the beam through the U-shapedlock catches. Each U-shaped lock catch is composed of a U-shaped catch, a pressing lock plate and locking nuts, wherein threads are arranged at the two ends of the U-shaped catch, two round holes areformed in the pressing loc