1, automatic winding function of box girder spraying maintenance equipment, automatic spraying maintenance system of highway bridge precast beam yard, which can automatically and regularly maintain precast small box girder or T-beam, effectively avoiding the occurrence of shrinkage cracks. However, due to the influence of operators' quality consciousness and working attitude, artificial watering is often ignored. Phenomenon, make the box girder web easy to crack. In order to meet the needs of the current precast beam scale, production plant and quality, the maintenance system is automatically sprayed through a lot of meticulous work. According to the needs and suggestions of various users, this set of automatic spraying maintenance equipment was independently developed. Combined with the characteristics of precast box girder, automatic spraying and maintenance equipment realizes automatic spraying and atomization maintenance of precast box girder by assembling control system and increasing walking track. This method is suitable for the maintenance of various precast beams, especially for T-beams and box girders with wings. The bottom of the wing is the key part of automatic spraying and curing, and the butterfly nozzle can make the bottom of the wing all wet when it rotates. 2. Operating instructions for electronic control of spraying equipment. The electronic control part of spraying equipment is completely based on relay control system, which mainly uses contactor, intermediate relay and time relay to realize automatic round-trip and delay waiting functions. It has the functions of power-on self-start and limit automatic protection (return). Under the control of the time-controlled switch, the automatic start-stop function can be realized without supervision, and the automatic, self-checking and self-starting functions of the equipment can be realized.

3. Maintenance and repair of the equipment: pay attention to the special power supply for the equipment. Once the phase sequence of the power supply is adjusted, it cannot be changed at will in the future, otherwise the running direction of the traveling car will be completely reversed and the car will derail. Because it is relay control, the logic of the control depends entirely on the contacts of the relay, so it is necessary to replace the relevant relays and contactors regularly and check whether the wiring screws are loose regularly. If there are other problems that cannot be handled, please consult the electrical equipment manufacturer in time.