Pipe fitting joint structure

The utility model relates to a pipe fitting joint structure, include the pipe fitting and be pipy connecting piece, the tip of pipe fitting peg graft in in the connecting piece, just pipe fitting external diameter and connecting piece internal diameter looks adaptation, the periphery wall shaping of connecting piece has at least one bulge loop, its characterized in that: ratio between the perpendicular distance h of summit to the connecting piece periphery wall of bulge loop and the internal diameter d1 of connecting piece does: 0.04~0.15. The utility model discloses a reduce the height (the perpendicular distance of summit to the connecting piece periphery wall of bulge loop) of bulge loop, reduced the ratio between this height and the connecting piece internal diameter promptly to the intensity of improvement bulge loop, the tensile pull out force and the intensity of reinforcing connecting piece, and the high reduction of bulge loop has improved the pleasing to the eye degree of connecting piece. 本实用新型涉及种管