Design method for grate core of grid hole hot blast stove

The invention relates to the technical field of casting, in particular to a design method for a grate core of a grid hole hot blast stove. The grate core consists of a plurality of core units, wherein each core unit comprises a lower core head, an upper core head and a core body; the size and shape of the lower core head are matched with those of ventilated grid holes of a heat storage body checker brick corresponding to the lower core head; the core body consists of two regular triangular ventilated grid hole cores and a regular hexagonal ventilated grid hole core which are connected into anintegrated diamond core through the upper core head; and the lower core head is arranged at the central position of the two regular triangular ventilated grid hole cores and the regular hexagonal ventilated grid hole core respectively. The design method has the advantages of meeting the requirement of casting accuracy and improving production efficiency.