Rotary frame unit, rotary frame and machining tool of rotary frame unit

The utility model discloses a rotary frame unit which comprises an outer ring beam, a connecting pipe beam and an inner ring beam, an outer flange plate is fixedly connected between an upper panel and a lower panel of the outer ring beam in an embedded mode, and an inner flange plate is fixedly connected between an upper panel and a lower panel of the inner ring beam in an embedded mode. The upper ends and the lower ends of the outer flange plate, the inner flange plate, the bearing seat and the rib plate abut against the portion between the upper panel and the lower panel in a gapless mode. The utility model further provides a rotary frame and a machining tool of the rotary frame unit. The rotary frame unit and the rotary frame can prevent weld joints from shrinking, ensure the height consistency of the upper panel and the lower panel, and effectively avoid welding shrinkage. According to the machining tool for the rotary frame unit, the rotary frame unit can be machined easily, the machining quality of the