Heat preservation device for hot-metal bottle cover

The utility model discloses a thermal insulation device for a hot-metal bottle cover, which belongs to the field of steel production and comprises a plurality of thermal insulation components. The heat preservation assemblies are sequentially arranged and connected with the hot-metal bottle cover body. The heat preservation assembly comprises a fixing piece and a heat preservation cotton pressing piece. The heat preservation cotton pressing pieces are heat preservation cotton pressed into pieces. The fixing piece comprises a U-shaped groove and an anchoring piece; the multiple heat preservation cotton pressing pieces are perpendicular to the bottom of the U-shaped groove, a plurality of anchoring pieces penetrate through the heat preservation cotton pressing pieces in parallel, and the two ends of each anchoring piece are connected with the U-shaped groove. Compared with the prior art, the heat preservation cotton fixing piece is prevented from being baked by high-temperature molten iron, and meanwhile the se