Groove body structure for large disc type filter and assembly method of groove body structure

The invention discloses a tank body structure for a large disc filter and an assembling method thereof. The tank body structure comprises a tank body assembly, a mounting assembly, a rack and a supporting rod assembly, the groove body assembly is divided into a front half structure and a rear half structure along a central plane; the mounting assemblies are uniformly arranged around the four sides of the upper end of the tank shell; the machine frame is a rectangular frame and is arranged on a groove body installation foundation pit, and the upper surface of the machine frame and the lower surfaces of the installation assemblies are connected and arranged on the outer edge of a groove body. The supporting rod assemblies are arranged on the left side plate, the bottom plate and the right side plate of the groove shell at intervals in the front-back direction of the groove shell. The tank body is of a two-half structure, so that the tank body and the rack are transported in a split manner, and welding and assem