Steel rail flaw detection cleaning device with cleaning head convenient to replace

The utility model relates to the field of steel rail cleaning devices, and provides a steel rail flaw detection cleaning device convenient to replace a cleaning head, which comprises a cleaning disc, a rotating seat arranged at the upper end of the cleaning disc, a limiting column fixedly mounted at the upper end of the rotating seat, a gear column arranged at the upper end of the limiting column, and a limiting ring arranged above the cleaning disc, the upper end of the limiting ring is rotationally connected with a rotating shaft body, a gear groove is formed in the center of the lower end of the rotating shaft body, a storage groove is formed in the surface of the limiting column, and a telescopic spring is arranged in the storage groove. The rotating shaft body and the cleaning disc are limited and fixed in the horizontal direction under the sliding connection effect between the gear column and the gear groove formed in the rotating shaft body, and meanwhile the rotating shaft body and the cleaning disc a