Sealing connecting structure of corrugated pipe for gas

摘要

The present invention relates to an airtight connection device of a corrugated pipe for gas which presses an expansion pipe attaching unit of a front end of a corrugated pipe on a tight pressing unit of one side of a socket by screwing a but while attaching the expansion pipe attaching unit to the tight pressing unit to airtightly couple the expansion pipe attaching unit to the tight pressing unit to connect corrugated pipes for gas. More specifically, a semicircular airtight ring (13) is formed on a front end position of a tight pressing unit (12) of a socket, and an expansion pipe attaching unit (32) of a front end of a corrugated pipe is formed in a double overlapping structure. Airtightness is greatly improved in comparison to a conventional technique by a double airtight structure of forming a primary airtight unit on the inside of the expansion pipe attaching unit (32) of the corrugated pipe and the airtight ring (13) formed on the tight pressing unit (12) of the socket when screwing a nut by forming different inclinations of the tight pressing unit (12) of the socket and the expansion pipe attaching unit (32) of the front end of the corrugated pipe and a secondary airtight unit at a position where an end of the expansion pipe attaching unit (32) of the corrugated pipe is separated from the primary airtight unit on the tight pressing unit (12) of the socket.