Multi-section type spiral extrusion shaft

The utility model belongs to the technical field of spiral squeezers for garbage treatment, and particularly discloses a multi-section type spiral extrusion shaft which comprises a plurality of sections of shaft bodies which are fixedly connected in sequence, and spiral blades are fixed on the outer walls of the shaft bodies. The multiple sections of shaft bodies are connected to form a circular-truncated-cone-shaped main shaft and mounting shafts located at the two ends of the main shaft, connecting parts used for being connected and matched with the adjacent shaft bodies are arranged at the ends of the shaft bodies, and the two connecting parts at the opposite ends of every two adjacent shaft bodies are detachably connected; and a strip-shaped welding through hole is formed in one of the two connecting parts which are connected and matched with each other. By the adoption of the scheme, the problem that the connecting strength between the shaft bodies is insufficient can be solved. 本实用新型属于垃圾处理用螺旋压榨机技术领域，具体公