Auxiliary monorail hoist of refueling machine for nuclear power plant

The utility model relates to fuel handling and storage system equipment for a nuclear power plant, in particular to an auxiliary monorail hoist of a refueling machine for the nuclear power plant. The auxiliary monorail hoist comprises a hoisting frame, a hoisting transmission mechanism is connected at two ends of the hoisting frame by a left support plate and a right support plate, the middle part of the hoisting frame is connected with a fixed lifting device by a lifting hook plate, the lower end of the fixed lifting device is connected with one end of a steel wire rope, the other end of the steel wire rope is wound on a winding drum of the hoisting transmission mechanism, the steel wire rope is connected with a lifting hook assembly by a pulley, a device for rope arrangement is arranged at the lower part of a hoisting beam of the hoisting frame, a walking limit switch and a hoisting limit switch are arranged at the upper part of the hoisting beam of the hoisting frame, the upper part of the hoisting frame is connected with a walking transmission mechanism, and buffer devices are arranged at two ends of the walking transmission mechanism. By arranging double steel wire ropes, a cam limit switch, an encoder assembly and double braking devices, the auxiliary monorail hoist can realize safety protection functions required by operation process.