Title:
超電導送電用断熱多重管およびその敷設方法
Document Type and Number:
Japanese Patent JP6662468
Kind Code:
B2
Abstract:
A thermal-insulated multi-walled pipe for superconducting power transmission comprises: a superconducting cable; a multi-walled pipe composed of a plurality of straight pipes and houses the superconducting cable; and a plurality of spacers that are located between adjacent two straight pipes of the plurality of straight pipes, wherein a cross-sectional shape of each spacer is a polygon having three or more vertices, each spacer has a through-hole at a center in the plane , an inner straight pipe is located to pass through the through-hole, a frictional coefficient µibetween each spacer and the inner straight pipe is 0.1 or less, a frictional coefficient µobetween each spacer and an outer straight pipe is 0.1 or less, and a ratio Ld/d of a diagonal equivalent length Ldof the polygon to an inner diameter d of the outer straight pipe of the adjacent two straight pipes is 0.9 or less.
Inventors:
Yasuhide Ishiguro
Akio Sato
Shigeto Sakashita
Akio Sato
Shigeto Sakashita
Application Number:
JP2018549992A
Publication Date:
March 11, 2020
Filing Date:
May 29, 2018
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
H01B12/14; F16L9/18; F16L59/075; H01L39/04
Domestic Patent References:
| JP2007080649A | ||||
| JP2011231917A | ||||
| JP6325629A | ||||
| JP2015161010A |
Attorney, Agent or Firm:
Kenji Sugimura
Mitsutsugu Sugimura
Keisuke Kawahara
Satoko Ito
Mitsutsugu Sugimura
Keisuke Kawahara
Satoko Ito