二重管の溶接方法

Japanese Patent JP7316837

B2

To make it possible to easily perform a double pipe welding work.SOLUTION: According to this double pipe welding method, a structure, which has an outer cylinder and an inner cylinder with a prescribed central axis as a center and in which the outer cylinder and the inner cylinder are integrally fixed at one end in an axial direction of the central axis, is provided, the other ends in each axial direction of two double pipe structures, of which the other end in the axial direction is opened, are welded, thereby forming a double pipe. The double pipe welding method includes: a step at which the other end of a first structure and the other end of a second structure of two double pipe structures are so made as to be opposite to each other so that at least the inner cylinders contact or are proximate to each other; a step at which electron beam is so radiated as to penetrate or pass between the outer cylinders from the lateral side of the outer cylinder and arrive at the opposite parts of the inner cylinders with respect to the first structure and the second structure which are so located as to be opposite to each other, thereby welding the inner cylinders; and a step at which electron beam is radiated to the opposite parts of the outer cylinders with respect to the first structure and the second structure, which are so located as to be opposite to each other, from the lateral side of the outer cylinder, thereby welding the outer cylinders.SELECTED DRAWING: Figure 4

Akihiro Miyamoto
Hiroshi Hara
Yuji Kimura

JP2019093129A

July 28, 2023

May 16, 2019

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Mitsubishi Heavy Industries Machinery Systems Co., Ltd.

B23K15/00; H05H7/20

JP56041085A
JP63106583U
JP2014161907A
JP2017201602A
JP56071588A
JP63116702U
JP2015227812A

Sakai International Patent Office

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