Thermal insulation structure of tempering furnace

According to the technical scheme, the tempering furnace heat preservation structure is characterized in that the tempering furnace heat preservation structure comprises a movable heat preservation frame arranged on the side wall of a tempering furnace, a plurality of heat preservation plates arranged at intervals are arranged on the heat preservation frame, heat preservation cavities are formed between the adjacent heat preservation plates at intervals, and the heat preservation cavities are tightly filled with heat preservation cotton. The tempering furnace heat preservation structure has the advantage of being good in heat preservation effect. 本申请提供了一种回火炉保温结构，其技术方案要点是：包括：设置在回火炉侧壁的活动保温架，所述保温架上设置有多块间隔设置的保温板，相邻的所述保温板之间间隔形成有保温腔，所述保温腔内紧密填充有保温棉。本申请提供的一种回火炉保温结构具有保温效果好的优点。