Polyurethane spraying system for large-pipe-diameter thermal insulation pipe

The utility model discloses a polyurethane spraying system for a large-pipe-diameter thermal insulation pipe, which relates to the technical field of spraying equipment and comprises a fixing device and a paint spraying device. The paint spraying device comprises a power box fixedly mounted on the side wall of the mounting frame, a motor fixedly mounted on the outer surface of the power box and a lead screw fixedly connected with an output shaft of the motor, a guide seat is screwed to the surface of the lead screw through threads, and a guide rod playing a role in guiding the guide seat is further fixedly arranged on the mounting frame. A storage box is fixedly mounted at the top of the mounting frame through bolts, and a spray gun head is fixedly mounted on the surface of the guide seat through bolts and connected with the bottom of the storage box through a hose. According to the utility model, through the clamping part, the paint spraying device and the driving wheel and the driven wheel which are matched