At present, the larger induction melting furnaces mostly adopt a closed structure in which the outer magnetic path is closed by the conducting magnet. The furnace body of the induction melting furnace of this structure is mainly composed of a furnace frame, a furnace shell, an inductor, a yoke, a furnace lining, a tilting mechanism, a furnace cover and a water-cooled cable. Among them, the furnace frame (referring to the movable furnace frame) is generally a steel structure frame at the bottom of the furnace, which is mainly used to install the induction coil and yoke to bear the load of the furnace lining and the workpiece. Therefore, it requires high strength, good rigidity, and good heat dissipation. It is made by welding steel plates on the steel frame of the furnace bottom to protect the furnace lining, prevent stress and deformation of the furnace lining, and strengthen the structure of the electric furnace. However, the well-known and commonly used furnace shells are mostly cylindrical structures spliced by multiple arc-shaped steel plates, which are sleeve-welded to the furnace bottom steel frame, which has the following defects: First, due to the internal tension of the arc-shaped steel plates, the strength and stiffness of such furnace shells They are relatively low, and have limited reinforcement effect on the overall structure of large-scale induction melting furnaces. At the same time, the cylindrical structure of this type of furnace shell makes it difficult to maintain the internal induction coil and yoke. The existing solution is often in the furnace. Multiple sets of rectangular holes are opened at different positions on the shell, but this causes the overall rigidity of the shell to be further reduced; in the end, the overall installation of such furnace shells is cumbersome and difficult.
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