High-tension expansion ring

The utility model discloses a high-tension expansion ring and relates to the field of expansion rings, the high-tension expansion ring comprises an expansion ring body, the expansion ring body is provided with an opening, the opening enables the expansion ring body to form a first abutting face and a second abutting face, the first abutting face is provided with a limiting protrusion, the second abutting face is provided with a limiting groove, and the limiting protrusion is embedded in the limiting groove; the expansion ring body is provided with a mounting groove, the mounting groove is provided with a second spring steel wire, the second spring steel wire is in an arc shape, and the second spring steel wire is embedded into the mounting groove. According to the technical scheme, the limiting groove and the limiting protrusion are arranged, the limiting protrusion is embedded into the limiting groove, and when the opening part of the expansion ring body is stressed, the limiting protrusion abuts against the