螺旋罐spiral can没有导轨立柱，罐体靠安装在侧板上的导轨与安装在平台上的导轮相对滑动产生缓慢旋转而上升或下降。Without guide rail column, tank body by the guide rail installed on the side plate and the guide wheel installed on the platform relative sliding to produce a slow rotation and rise or fall.优点：比直立罐节省金属15～30％，且外形较为美观。Advantages: metal 15 ~ 30% less than the upright tank, and the shape is more beautiful.缺点defect：不能承受强烈的风压Unable to withstand strong wind pressure；施工允许误差较小，基础的允许倾斜或沉陷值也较小The allowable error of construction is small, and the allowable tilt or subsidence of foundation is also small；导轮与轮轴往往产生剧烈磨损。 Guide wheel and wheel shaft often produce violent wear.