Vertical lifting movable portal hoist for dam

The utility model discloses a vertical lift movable portal hoist for a dam, which comprises a dam frame, a hoist frame body, a balancing device, an adjusting device and a supporting device, the dam frame is erected on the dam, and the hoist frame body is movably fixed on the dam frame through the balancing device, the adjusting device and the supporting device. According to the utility model, the whole hoist frame body can be jacked up through the adjusting device, so that a space is formed between the hoist frame body and the dam frame, the space is used for carrying articles and instruments and also can be used for people to walk, and after the hoist frame body is jacked up through the adjusting device, the hoist frame body can be lifted up through the adjusting device. Therefore, the opening and closing machine frame body cannot cover the upper portion of the dam, a corresponding operation space can be provided for an operator on the dam, and the fixity between the dam frame and the opening and closing mac