Automatic spraying and maintaining system for prestress concrete box girder

The utility model provides an automatic spraying and maintaining system for a prestress concrete box girder, and solves the problem that the conventional box girder subjected to manual watering and maintenance cannot meet the requirement on scaled production. The automatic spraying and maintaining system comprises a maintained prestress concrete box girder (1), a main water pipeline (4) and branch water pipelines (3), wherein the branch water pipelines (3) with spraying heads (2) are arranged on two sides of the maintained prestress concrete box girder (1); the other end of the main water pipeline (4) is communicated with a water outlet of a pressure storage water tank (6) through a spraying electromagnetic valve (5); a water inlet of the pressure storage water tank (6) is communicated with a water outlet of a pressure water pump (9); a water inlet of the pressure water pump (9) is communicated with an impounding reservoir (11) through a water outlet pipe (10); a water pump working control relay (8) is arrang