Manhole cover opening tool for high-pressure heater of nuclear power station

The invention belongs to the field of nuclear power overhaul, and particularly relates to a nuclear power station high-pressure heater manhole cover opening tool which comprises a rotary connecting unit, a T-shaped turnover operating rod, a manhole cover connecting piece and a rotary plate. One end of the rotary connecting unit is fixedly connected with the manhole shell ring, the other end of the rotary connecting unit is fixedly connected with one end of the rotary plate, and the rotary connecting unit can be bent at any angle in a plane; one end of the manhole cover connecting piece is fixedly connected with the manhole cover, and the other end of the manhole cover connecting piece is rotationally connected with the other end of the rotating plate; the T-shaped turnover operating rod is parallel to the rotating plate and fixedly connected with the rotating plate in the direction of the operating rod, and the manhole cover can be turned over by operating the T-shaped turnover operating rod. The device is li