PLUG, PIPING STRUCTURE AND INSTALLATION METHOD FOR PLUG

• Main Authors: TOKIYOSHI TAKUMI, KATABUCHI HIROKI, SHIMODA SUMIYUKI, FUJIWARA NAOKO
• Format: Patent
• Language: English; Japanese
• Published: 25.11.2022
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

To provide a plug capable of sealing gas for back shield with the plug itself, a piping structure, and an installation method for the plug.SOLUTION: A plug 1 closes a through hole 51 formed on a pipe 50 from an outer peripheral surface side of the pipe 50 and includes: a columnar nozzle part 20 extending in an axis X direction; and a seal part 30 which is connected to the nozzle part 20 and defines a retention space S for retaining gas between itself and the nozzle part 20 in the through hole 51. The seal part 30 has: a shaft part 31 whose diameter is smaller than an inner diameter of the through hole 51 and whose base end is connected to the nozzle part 20; and a disc part 32 connected to an end of the shaft part 31 in accordance with an inner shape of the through hole 51.SELECTED DRAWING: Figure 6 【課題】プラグ自体でバックシールド用のガスを封止できるプラグ、配管構造物及びプラグの設置方法を提供する。【解決手段】プラグ１は、配管５０に形成された貫通孔５１を配管５０の外周面側から閉塞するプラグ１であって、軸線Ｘ方向に延びた柱状の管台部２０と、管台部２０に接続され、貫通孔５１内において管台部２０との間にガスを滞留させる滞留空間Ｓを画定する封止部３０と、を備えている。また、封止部３０は、貫通孔５１の内径よりも小径であり、基端が管台部２０に接続された軸部３１と、貫通孔５１の内形状に対応して、軸部３１の先端に接続された円板部３２と、を有している。【選択図】図６