Combination formula vortex scale control plug -in part in heat exchange tube

The utility model relates to a combination formula vortex scale control plug -in part in heat exchange tube, this plug -in part comprises spiral tie, support piece. This design is made up the spiral tie with support piece, its holistic radius slightly is less than the radius of heat exchange tube. Interior device is support piece, and the last axial that is provided with the equipartition of support piece is circular -arc backup pad, rotates the hole in the backup pad for the assembly screw tie, and the welded connection hollow shaft is passed through to the backup pad, and support piece's one end has ratating end cover, is equipped with rotating vane in the end cover, is the coaxial configuration with support piece. Outer device is the spiral tie, is connected with clearance fit's mode through axle on the spiral twisted strip and the hole in the backup pad. Under operating condition, ratating end cover produces rotatory moment of torsion drive plug -in part and rotates under the impact of liquid, and this de