Segmented outer guide cylinder of single crystal furnace

The utility model belongs to the field of outer guide cylinders, and particularly relates to a sectional outer guide cylinder of a single crystal furnace, which comprises a cylinder body and a cylinder bottom which are detachably connected, a transition part is arranged at the bottom of the cylinder body in an inward inclined manner, and the end surface of the inner wall of the transition part is an inclined surface I with a large upper diameter and a small lower diameter. The outer end face of the cylinder bottom is provided with an inclined face II matched with the inclined face I. The inclined face I and the inclined face II are coaxial, concentric, identical in diameter and attached to each other, in the installation process of the cylinder bottom and the cylinder body, the inclined face I and the inclined face II are embedded, the self-positioning effect is achieved, the installation difficulty is simplified, and the installation precision is improved. The inclined plane II can be tightly attached to the