HEAT-INSULATED MULTILAYER PIPE FOR ELECTRIC POWER TRANSMISSION UNDER CONDITIONS OF SUPERCONDUCTIVITY AND METHOD OF ITS LAYING Russian patent published in 2020 - IPC H01B12/14 H01L39/04 

FIELD: manufacturing technology.

SUBSTANCE: heat-insulated multilayer pipe for electric power transmission under superconductivity conditions includes: superconducting cable; multilayer pipe, which consists of plurality of rectilinear pipes and in which superconducting cable is placed; and a plurality of interlayers, which are arranged between two adjacent straight-line tubes of the plurality of straight-line tubes, wherein the cross-sectional shape of each interlayer is a polygon having three or more vertices, each layer has a through hole in the center in plane, rectilinear inner tube is disposed so that it passes through the through hole, the friction coefficient μ_i between each layer and an inner straight tube is 0.1 or less, μ_o coefficient of friction between each interlayer and the outer straight tube is 0.1 or less, and the ratio L_d/d of equivalent diagonal length L_d of the polygon to the internal diameter d of the outer straight tube of said two adjacent straight tubes is 0.9 or less.

EFFECT: heat-insulated multilayer pipe for electric energy transmission according to the invention under superconductivity conditions has excellent heat-insulating properties compared to heat-insulated multilayer pipes containing corrugated pipes or flexible pipes.

6 cl, 3 dwg