Double-beam bridge crane

The utility model discloses a double-beam bridge crane which comprises a supporting disc, rolling structures are arranged on the two sides of the upper end of the supporting disc, adjusting sleeves are movably installed on the two sides of the interior of the supporting disc, threaded layers are arranged on the inner rings and the outer rings of the adjusting sleeves, adjusting screw rods are movably inserted into one ends of the interiors of the adjusting sleeves in a penetrating mode, and the other ends of the interiors of the adjusting sleeves are connected with the supporting disc. One end of the adjusting screw rod is movably inserted into the outer side of the supporting disc in a penetrating mode, the outer side of the adjusting sleeve is movably sleeved with a movable threaded sleeve, and one end of the movable threaded sleeve is movably provided with a movable supporting rod. The mutual exclusion magnetic strips move in the mounting frame under the action of magnetic force, so that the mutual exclusi