Glass protective coating spraying device

The utility model relates to the technical field of glass spraying, in particular to a glass protective coating spraying device which is characterized in that a through groove is formed in a base, and a plurality of conveying rollers are rotatably arranged in the through groove at intervals; the limiting assemblies are arranged on the two sides of the through groove. The spraying assembly is arranged on the top of a supporting frame on the base. The drying assembly is arranged in the supporting frame behind the spraying assembly and comprises a hot air box arranged in the supporting frame above the conveying rollers, the interior of the hot air box communicates with the output end of an air heater through a pipeline, a plurality of air outlets are formed in the lower surface of the hot air box, a first screw rod is vertically arranged on the upper surface of the hot air box, and the upper end of the first screw rod penetrates through the supporting frame. The second bevel gear is in threaded connection with t