Dry type transformer low-voltage coil interlayer cooling air passage structure

The utility model discloses a dry type transformer low-voltage coil interlayer cooling air passage structure. The dry type transformer low-voltage coil interlayer cooling air passage structure comprises multiple air passage supporting strips, wherein the air passage supporting strips are bonded to a DMD insulating material which is 0.1-0.5 mm thick at certain intervals, so that an air passage curtain is formed; the length of the overall air passage curtain is consistent with that of a low-voltage coil, and the overall air passage curtain is arranged between a certain number of turns of layers, in the width direction, of the low-voltage coil in the axial height direction, and is wound around the portion of the coil to form cooling air passages. Compared with the prior art, the heat dissipation capacity of the low-voltage coil is improved, the consumption of air passage carriers is reduced, the cost is lowered, the longitudinal air passages are formed and make the heat impact resistance of the coil high, and therefore the service life of a product is prolonged greatly.