Automatic backwash small-caliber filter shell with improved structure

The utility model relates to the technical field of filters, in particular to an automatic backwash small-caliber filter shell with an improved structure, which comprises an inlet end, a containing cavity and an outlet end, an upper flange is arranged above the containing cavity, a central pipe is arranged at the bottom of the shell, and the central pipe is located under the containing cavity. Bymeans of the casting device, the casting defect that the shell center pipe deviates from the core is overcome, the concentricity is guaranteed, the casting quality is improved, and therefore the production efficiency is improved, and the production cost of products is reduced. 本实用新型涉及过滤器技术领域，尤其是一种改进结构的自动反冲洗小口径过滤器壳体，包括进口端、容纳腔和出口端，所述的容纳腔上方设置有上法兰，所述的壳体底部设置有中心管，中心管位于容纳腔的正下方，中心管上朝向上法兰方向的一端设置第一锥螺纹孔，中心管上朝向底部方向的一端设置第二锥螺纹孔，本实用新型避免壳体中心管偏芯的铸造缺陷，保证同心度，提高铸件质量，从而提高生产效率，降低产品生产成本。