Thermal insulation cylinder and single crystal silicon rod drawing device

The embodiment of the utility model provides a heat preservation cylinder and a single crystal silicon rod drawing device. The thermal insulation cylinder comprises an annular body; the shell is at least partially embedded in the annular body, and an annular containing cavity is formed in the shell; an annular magnetic part, wherein the magnetic part is an accommodating cavity in the shell; the water inlet pipe is communicated with the accommodating cavity, and the water inlet pipe is used for introducing a cooling medium into the accommodating cavity so as to cool the magnetic part; and the water outlet pipe communicates with the containing cavity, and the water outlet pipe is used for guiding out the cooling medium in the containing cavity. Under the condition that the heat preservation cylinder is applied to the single crystal silicon rod drawing device, the crystal drawing quality of a single crystal silicon rod can be improved. 本申请实施例提供了一种保温筒和单晶硅棒拉制装置。所述保温筒包括：环状本体；壳体，所述壳体至少部分嵌设于所述环状本体内，所述壳体内设置有环状的容纳腔；环状的