Movable lifting device for pump maintenance

The utility model relates to the technical field of lifting equipment, in particular to a movable lifting device for pump maintenance, which comprises a lifting device shell, a lifting mechanism arranged on the inner wall of the lifting device shell, a motor fixedly connected to the outer wall of the lifting device shell, an outer frame arranged on the front end face of the lifting device shell, and an adjusting mechanism arranged on the inner wall of the outer frame. The inner wall of the lifting device shell is in threaded connection with a bolt, the outer wall of the bolt is in threaded connection with a sleeve plate, the inner wall of the sleeve plate is fixedly connected with an air cylinder, and universal wheels are fixedly connected to the four corners of the bottom of the lifting device shell. When a motor works, a rotating rod is driven to rotate, the rotating rod drives a second bevel gear to rotate, the second bevel gear drives a first bevel gear to rotate, the first bevel gear drives a threaded ro