Title:
PLUG, PIPE STRUCTURE, AND PLUG INSTALLATION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/239682
Kind Code:
A1
Abstract:
Provided are a plug, a pipe structure, and a plug installation method that make it possible to seal back-shielding gas using the plug itself. The plug (1) blocks, from the outer circumferential surface side of a pipe (50), a through-hole (51) formed in the pipe (50), and comprises: a columnar pipe base portion (20) that extends in the axial (X) direction; and a sealing portion (30) that is connected to the pipe base portion (20) and defines a retention space (S) in which gas is retained between the sealing portion (30) and the pipe base portion (20) inside the through-hole (51). In addition, the sealing portion (30) has: a shaft (31) that has a smaller diameter than the inner diameter of the through-hole (51) and has the base end thereof connected to the pipe base portion (20); and a circular plate portion (32) that corresponds to the internal shape of the through-hole (51) and is connected to the tip of the shaft (31).
Inventors:
SHIMODA JUNJI (JP)
TOKIYOSHI TAKUMI (JP)
KATAFUCHI HIROKI (JP)
FUJIWARA NAOKO (JP)
TOKIYOSHI TAKUMI (JP)
KATAFUCHI HIROKI (JP)
FUJIWARA NAOKO (JP)
Application Number:
PCT/JP2022/019375
Publication Date:
November 17, 2022
Filing Date:
April 28, 2022
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD (JP)
MITSUBISHI POWER LTD (JP)
MITSUBISHI POWER LTD (JP)
International Classes:
B23K33/00; B23K9/00; B23K9/02; G21C17/003
Foreign References:
| JPS587094U | 1983-01-18 | |||
| JP2008214746A | 2008-09-18 | |||
| JP2013158823A | 2013-08-19 | |||
| JP2011173139A | 2011-09-08 | |||
| JP2021032422A | 2021-03-01 | |||
| JPH07270090A | 1995-10-20 |
Attorney, Agent or Firm:
FUJITA, Takaharu (JP)
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