Three-phase five-column mining transformer return yoke clamping structure

The utility model relates to a transformer iron core fixing auxiliary structure, in particular to a three-phase five-column mining transformer side yoke clamping structure, which solves the technical problems in the background technology, and comprises pressing devices which are used for clamping side yoke columns and are respectively positioned on the side edges of the two side yoke columns of a transformer, and each pressing device comprises a pressing plate and an insulating plate which are oppositely arranged, the insulating plate abuts against the side yoke column, the upper end and the lower end of the pressing plate are fixed to the upper clamping piece and the lower clamping piece through fastening nuts respectively, a plurality of coping nuts are fixed to the pressing plate, the coping nuts are arranged in the length direction of the pressing plate and penetrate through the pressing plate, bolts are matched with the coping nuts in a threaded mode, and the inward ends of the bolts press the insulating