Refining furnace cover opening and closing structure

The utility model discloses an opening and closing structure for a refining furnace cover, relates to the technical field of opening and closing of furnace covers, and solves the technical problems that at present, the furnace cover of the refining furnace needs to be opened and closed by means of a machine, and opening and closing mechanical equipment is not suitable for refining furnaces with different sizes due to the fact that the sizes of the furnace covers of different refining furnaces are different. Comprising an opening and closing sleeve frame, fixed connecting plates are fixedly connected to the two sides of the opening and closing sleeve frame, two sliding supporting rods are fixedly connected to the interiors of the two fixed connecting plates in a sleeved mode, a sliding sleeve plate and a sliding supporting plate are slidably connected between every two corresponding sliding supporting rods in a sleeved mode, and the two sliding supporting plates are fixedly connected with the corresponding sli