Water spraying maintenance device for concrete box girder

A water spraying maintenance device of a concrete box girder comprises a fixed pipe, a rotary sleeve and two end socket supports which are oppositely arranged and provided with water passing cavities respectively, the fixed pipe is communicated with the water passing cavities, and the two ends of the fixed pipe axially extend into the end socket supports and are fixedly connected with the axial inner walls of the water passing cavities. The circumferential outer wall of the fixed pipe is rotationally sleeved with a rotary sleeve; the two ends of the rotating sleeve are rotationally inserted into the end socket supports, and fan blades for providing rotating power for the rotating sleeve are coaxially and fixedly mounted on the circumferential inner walls of the two ends of the rotating sleeve; and a water passing joint communicated with the fixed pipe and the water passing cavity is fixedly arranged on the outer wall of the end socket support. The water spraying maintenance device is pushed by fluid power of