Plastic cavity structure of steam boiler

The invention discloses a plastic cavity structure of a steam boiler. The plastic cavity structure of the steam boiler comprises a cavity, wherein the cavity comprises a surface plate, side plates, a rear plate, a top plate and a bottom plate; the surface plate is provided with a cavity entrance; the plastic cavity structure of the steam boiler is characterized in that the cavity is integrally formed by injection molding of high-temperature-resistant plastic; a plurality of strip-shaped protrusions are arranged on the side plates and are transversely and uniformly distributed on the two side plates. The cavity of the plastic cavity structure is a high-temperature-resistant plastic cavity; the high-temperature-resistant plastic cavity is integrally formed for one time by an injection molding process; the injection molding process replaces a process of forming the high-temperature-resistant plastic cavity by splicing a plurality of metal steel plates and a plurality of parts through a plurality of procedures; the high-temperature-resistant plastic cavity has the advantages of corrosion resistance, high air tightness, fewer parts and the like; the production process of the plastic cavity is relatively easy; the plastic cavity is relatively simple and convenient to produce, mount and maintain, and relatively low in overall cost; compared with a metal material, the heat preservation and insulation effect of the plastic cavity is remarkably improved.