Conveying wheel with adjustable outer diameter and electroplating line with conveying wheel

The utility model provides a conveying wheel with an adjustable outer diameter and an electroplating line with the conveying wheel, and belongs to the technical field of electroplating equipment, the conveying wheel with the adjustable outer diameter comprises a base part and an outer ring sleeved outside the base part, and a plurality of radial plates are connected between the base part and the outer ring; at least one position of the outer ring is broken, a radial plate is arranged at the fracture, and the radial plate arranged at the fracture can stretch out and draw back to adjust the distance between the outer ring and the base part; according to the conveying wheel with the adjustable outer diameter, the outer ring can be opened from the fracture through the supporting of the base part and the adjustment of the length of the radial plate, so that the outer diameter of the outer ring is adjusted, and the conveying speed of a steel belt can be adjusted when the steel belt is supported or driven through th