Inner cooling device for prohibiting macrosegregation of large-sized steel ingot

The utility model relates to an inner cooling device for prohibiting the macrosegregation of a large-sized steel ingot, in particular to a device for prohibiting the macrosegregation of a large-sized steel ingot by adding steel rods, which belongs to the low-segregation large-sized steel ingot manufacturing technology. Before the large-sized steel ingot is cast, at least a round of steel rods are preset in a steel ingot cavity, to improve the particle nucleation in the ingot and the cooling speed of the ingot, so as to prohibit solute convection, prevent the formation of segregation channels, and obtain the low-segregation steel ingot with uniform components and fine tissues. The inner cooling device for prohibiting the macrosegregation of the large-sized steel ingot can solve the problems of non-uniform chemical components, large grain size, low melting point, the A, V and other types of macrosegregation of low-density elements (C, P and the like), low steel ingot utilization rate and the like of the large-sized ingots, so as to produce the low- segregation large-sized steel ingot with uniform chemical components. The inner cooling device for prohibiting the macrosegregation of the large-sized steel ingot is suitable for sand and metal-based large-sized steel ingots with all models and made of all materials.