Pumped well steel tube filter tube well-washing device

The utility model discloses a pumped well steel tube filter tube well-washing device which comprises a frame, an electromotor, a hoister, a mast, a mast lifting mechanism, a pulley, a steel rope, a counterweight device arranged on the back portion of the frame, and a filter tube dredging device which is composed of a main support shaft, a bearing lifting ring, cylindrical compression springs, sliding sleeve guide bases, a derusting wheel bracket, a derusting wheel support bar, a serrated derusting wheel, an adjusting nut and a checknut, wherein the top end of the main support shaft of the filter tube dredging device is welded with the bearing lifting ring, the upper and the lower cylindrical compression springs are installed on the shaft diameter of the main support shaft, two sliding sleeve guide bases can slide up and down along the outer diameter of the main support shaft, the tension of the cylindrical compression springs of the dredging device is adjustable, and the steel rope wound on the outer diameter