Ventilation protection door for preassembled box-type transformer substation

The utility model provides a ventilation protective door for a preassembled box-type substation, which comprises a protective door body, a hinge mounting bracket, a limiter bracket, a lock rod mounting bracket and an induced draft tube, the protective door body is provided with an induced draft tube mounting hole, and the hinge mounting bracket, the limiter bracket and the lock rod mounting bracket are respectively welded on the protective door body; an anti-twisting reinforcing rib is arranged in the middle of the protective door body, and a door box lock mounting hole is formed in the anti-twisting reinforcing rib; bridge-shaped air inlets are evenly distributed in the lower half portion of the protective door body, and bridge-shaped air outlets are evenly distributed in the upper half portion of the protective door body. Lower air inlet holes are formed in the lower end face of the induced draft barrel, and upper air outlet holes are formed in the upper end face of the induced draftbarrel. The beneficial e