Anti-scaling tubing coupling structure

The utility model relates to an anti-scaling tubing coupling structure. The two ends of an inner wall of a tubing coupling are provided with internal threads, the internal threads are sealing conical internal threads, and an anti-scaling bushing is fixed in the middle of the inner wall of the tubing coupling. The anti-scaling bushing is made of a material for preventing dirt from being adsorbed and remaining and reduces the probability of crude oil impurity adsorption and remaining; meanwhile, a special oil tube is adopted, the abrasion of a sucker rod and an inner wall of the oil tube and inner corrosion of the oil tube can be avoided, and the effect of protecting the sucker rod is achieved. The special oil tube is provided with an overturned edge, an inner ring and an outer ring at the position of an overturned edge pipe opening are provided with chamfers; a lining pipe of the special oil tube is connected with the transition section of the anti-scaling structure bushing, the effect of protecting the coupling is achieved well, and the service life of the coupling is prolonged.