Hollow expanded diameter conductor

The utility model discloses a hollow expanded diameter conductor, which belongs to the technical field of expanded diameter conductors, an inner stranded wire layer is wound outside a supporting tube, an outer stranded wire layer is wound outside the inner stranded wire layer, the supporting tube comprises a tube body, a plurality of wave crests and a plurality of wave troughs are arranged on the outer wall of the tube body, the thickness of the wave crests is larger than that of the wave troughs, and the thickness of the outer stranded wire layer is larger than that of the wave troughs. The strength of the pipe body can be improved through the wave crests, and the flexibility of the pipe body can be improved through the wave troughs. When the supporting pipe is used, the plurality of wave crests on the surface of the pipe body can greatly improve the strength of the pipe body, the thickness of the wave troughs on the outer wall of the pipe body is smaller than that of the wave crests, and the pipe body is di