Thermal insulation sleeve for steel-making high-temperature flue gas water-cooling pipeline

The invention provides a heat preservation sleeve for a steelmaking high-temperature flue gas water-cooling pipeline, the heat preservation sleeve comprises a plurality of sub-sleeves, each sub-sleeve comprises an outer layer, a filling layer and an inner layer which are sequentially arranged from outside to inside, and the adjacent sub-sleeves are movably spliced to wrap the steelmaking high-temperature flue gas water-cooling pipeline. The heat preservation sleeve for the steel-making high-temperature flue gas water cooling pipeline is good in heat insulation effect, the purposes of energy conservation, consumption reduction and scald prevention are achieved, residual resources are fully utilized, the appearance is neat and attractive, the adjacent sub-sleeves are connected in a stepped edge pressing mode, splicing is tight, separation is not prone to occurring, no gap exists, and the heat insulation effect is ensured; each sub-sleeve can be independently, flexibly, quickly and efficiently disassembled and a