Rotary lifting equipment suitable for cleaning inside of oil storage tank and operation method of rotary lifting equipment

The invention relates to rotary lifting equipment suitable for cleaning the inside of an oil storage tank, which comprises a vertical oil storage tank, and a guide unit and a rotary lifting unit which are arranged in the vertical oil storage tank, and an adaptive access hole is formed in the top of the vertical oil storage tank; the guide unit comprises a straight track and a spiral track, the rotary lifting unit comprises a driving motor and a lifting motor, and a safety locking unit is mounted in the rotary lifting unit; the safety locking unit comprises a rotating disc, four inserting holes are formed in the surface of the rotating disc, and a pressing rod is arranged in each inserting hole in an inserted mode. According to the device, by arranging the safety locking unit and the rotary lifting unit, after a driving motor is damaged, the whole device has the downward movement tendency to drive a positioning gear, a rotary shaft and a rotary disc to rotate, a notch in the surface of a pressing rod at the to