Blanking pipeline insulation device and calcium carbide furnace adopting same

The utility model provides a blanking pipeline insulation device which comprises an insulation short circuit, the insulation short circuit is cylindrical, the height of the insulation short circuit is 100-180 mm, and the thickness of the insulation short circuit is 70-90 mm; the blanking pipeline is provided with a cut-off position, an upper flange is installed at the upper cut-off end of the blanking pipeline, a lower flange is installed at the lower cut-off end of the blanking pipeline, the insulating short circuit is arranged between the upper flange and the lower flange and fixed through a bolt and a nut, the bolt is sleeved with an insulating pipe, and the nut is additionally provided with an insulating spacer. The inner wall of the insulation short circuit is consistent with the inner wall of the discharging pipeline in shape and size, and the inner wall of the insulation short circuit is vertically aligned with the inner wall of the discharging pipeline after installation. The utility model further pro