Sand blasting derusting device for rusted steel bars

The utility model relates to the technical field of steel bar derusting, in particular to a rusted steel bar sand blasting derusting device which comprises a round rod, a derusting structure is arranged on the surface of the round rod, the derusting structure comprises two long rods, the surfaces of the two long rods are fixedly connected with the round rod, the arc surfaces of the long rods are sleeved with sleeves in a sliding mode, and the sleeves are connected with the round rod in a sliding mode. Supporting rods are inserted into the sleeves, the ends, away from the sleeves, of the supporting rods are fixedly connected with arc plates, abrasive paper is fixedly connected to the surfaces of the arc plates, the arc surfaces of the long rods are in threaded connection with extrusion plates, the surfaces of the extrusion plates are rotationally connected with the sleeves, and the inner walls of the two sleeves are in threaded connection with clamping rods. The ends, away from each other, of the two clamping