Spraying device for polyurethane coating nodular cast iron pipe

The utility model provides a spraying device for a polyurethane coating spheroidal graphite cast iron pipe, which comprises a spraying pipe, a spraying head, a spraying head and a spraying head, the connecting teeth are arranged on the outer surface of the spraying pipe in the circumferential direction; the nozzles are formed on the inner surface of the spray pipe and are uniformly distributed along the circumferential direction of the inner surface; wherein the inner surface is a cambered surface concaved towards the cavity, baffles extending towards the inner side of the spray pipe are arranged on the two sides of the inner surface, and a feeding port and an air inlet are further formed in the spray pipe. And the automation degree of spraying work can be improved, and the spraying work efficiency can be improved. 本实用新型提供了一种聚氨酯涂层球墨铸铁管用喷涂装置，包括：喷管，整体呈环状，且内部具有环形腔体；连接齿，沿周向配置在所述喷管的外表面；喷嘴，形成在所述喷管的内表面，且沿所述内表面的周向均布；其中，所述内表面为凹向所述腔体的弧面，所述内表面的两侧具有向所述喷管的内侧延伸的挡板，所述喷管上还设有进料口和进气口。能够提高喷涂工作的自动化程度，可以提高喷涂工作效率。