Patent ID: 9568131
Date: 2017-02-14
CPC Classifications: F16L

Claim:
1. A connection structure of a corrugated pipe, the connection structure comprising a corrugated pipe; a clamping nut located outside of the corrugated pipe; a confinement ring mounted in a valley of the corrugated pipe and disposed within the clamping nut; a connection body having an insertion portion inserted into the clamping nut and having male threads threaded to the clamping nut; and a packing member located between an end of the corrugated pipe and the insertion portion to compress and deform the end of the corrugated pipe when the clamping nut is clamped and to provide a sealing between the end of the corrugated pipe and the insertion portion, wherein the packing member comprises an inclined portion that comes into surface contact with the end of the corrugated pipe, wherein the confinement ring consists of a rounded inner portion and a flat outer portion, wherein the rounded inner portion has a semi-circular cross section and faces the inclined portion of the packing member, and the flat outer portion extends vertically outward from an end of the rounded inner portion, wherein the pounded inner portion of the confinement ring comes into line contact with the end of the corrugated pipe and the flat outer portion of the confinement ring does not come into contact with the end of the corrugated pipe, thus concentrating a compression force on a position of the end of the corrugated pipe which comes into the line contact with the rounded inner portion of the confinement ring.