| 摘要 |
<P>PROBLEM TO BE SOLVED: To perfectly prevent leaking-out of gas even if a time passes, while easily performing plug installing work for piping shut-off. <P>SOLUTION: The plug-installing structure is provided in which a plug 50 is installed on a fitting flange 23 while forming a joining groove 51 on an outer peripheral surface of the plug 50 for shutting-off the flange 23, a segment 81 is projected from an arranging space 26, and the segment 81 is brought into close contact with the joining groove 51 of the plug 50. A large number of through-holes 160 communicating with the arranging space 26 are formed in the diametrical direction in the flange 23 of fittings 20, and the through-holes 160 are formed with a small diameter through-hole 161 for penetrating a segment connecting shaft 110, an intermediate diameter through-hole 162 formed in the rear of the small diameter through-hole 161 and inserting an intermediate cylindrical part 122 of a segment adjusting screw 120, and a female screw threadedly engaging with a fixing screw 140 in the rear of the intermediate diameter through-hole 162. <P>COPYRIGHT: (C)2012,JPO&INPIT |
