Lifting device for generator set draft tube manhole door

The utility model discloses a lifting device for a generator set draft tube manhole door. The lifting device comprises a bearing frame (1), a walking trolley rail (2), a walking trolley (3) and a lifting hoist (4). The bearing frame (1) is fixed on a concrete foundation (10) above a draft tube manhole through a fixing bolt (5). The side face of the bearing frame (1) is provided with an upper rotating shaft connecting base (6) and a lower rotating shaft connecting base (7). The lower rotating shaft connecting base (7) is arranged under the upper rotating shaft connecting base (6). The end of the walking trolley rail (2) is provided with a first connecting base (8). The first connecting base (8) on the walking trolley rail (2) is arranged above the upper rotating shaft connecting base (6). The first connecting base (8) and the upper rotating shaft connecting base (6) are connected together through a connecting dowel (9). The walking trolley rail (2) is provided with the walking trolley (3). The bottom of the wa