High-altitude auxiliary mounting device for river-crossing steel box girder drainage pipe

The utility model discloses a high-altitude auxiliary installation device of a river-crossing steel box girder drainage pipe. The high-altitude auxiliary installation device comprises a drainage pipe guide wheel (2), a rotary adjusting support and a fixed installation support. The fixed mounting bracket is detachably mounted on a lower flange (11) of a cross beam manhole of a steel box girder (10), one end of the rotary adjusting bracket is rotatably connected to the fixed mounting bracket, and the drainage pipe guide wheel is rotatably mounted at the other end of the rotary adjusting bracket, so that the drainage pipe guide wheel is rotatably positioned in the cross beam manhole (12); the multiple high-altitude auxiliary installation devices are sequentially arranged in the multiple cross beam manholes of the steel box girder at intervals, and the drainage pipe guide wheels of the multiple high-altitude auxiliary installation devices are located on the same straight line, so that the drainage pipe can be arr