Thermal-insulated multiple pipe for superconducting power transmission

A multi-tube and heat-insulating technology, applied in superconducting devices, the usage of superconducting elements, superconducting parts, etc., can solve the problems of damage to heat-insulating multi-tubes, longer time consumption, etc., and achieve simple construction, excellent response, The effect of improving thermal insulation

Active Publication Date: 2020-01-17
JFE STEEL CORP
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Problems solved by technology

The sparks generated at this time ignite the super insulator, causing fire and damage to the heat insulating multiple tubes used for superconducting power transmission.
In addition, when the space in which the super insulator is installed is decompressed to form a vacu

Method used

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  • Thermal-insulated multiple pipe for superconducting power transmission

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Embodiment

[0076] In order to confirm the effect of the coating layer containing the metal powder, samples were produced and emissivity was evaluated in the following procedure. It should be noted that a plate-shaped sample was used here, but since the shape of the base material does not directly affect the emissivity, the same effect can be obtained in an adiabatic multiple tube.

[0077] First, a 50 mm×100 mm square steel plate was prepared as a base steel plate for forming the coating layer. As the above-mentioned steel sheet, "SPCC" (general cold-rolled steel sheet) defined by JIS is used.

[0078] Next, after pretreatment is performed on the surface of the base steel sheet, a paint containing metal powder is applied and dispersed on the surface of the base steel sheet to form a coating layer containing metal powder. Table 1 shows the applied pretreatment, coating method, and types of metal powder and binder contained in the paint used. Table 1 shows the metal content (mass %), cov...

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Abstract

The present invention provides a thermal-insulated multiple pipe for superconducting power transmission having excellent thermal insulation properties, having highly suppressed heat incursion from outside caused by radiation, even when not using super insulation, and capable of being easily produced. The thermal-insulated multiple pipe for superconducting power transmission comprises a superconducting cable and a multiplex pipe housing the superconducting cable. The multiplex pipe comprises a plurality of straight pipes. At least one of the plurality of straight pipes has, on the surface thereof, a coating layer containing metal powder.

Description

technical field [0001] The present invention relates to a thermal-insulated multiple pipe for superconducting power transmission, and more particularly to a thermal-insulated multiple pipe for superconducting power transmission that highly suppresses the intrusion of heat from the outside due to radiation and has excellent thermal insulation properties. Multiple tubes. Background technique [0002] When metals, alloys, etc. are cooled, the superconductivity phenomenon in which the electrical resistance drops sharply to zero at a certain temperature has been studied and applied in various fields. Among them, superconducting power transmission using a cable in a superconducting state is being promoted to be put into practical use as a power transmission method without power loss during power transmission. [0003] In superconducting power transmission, in order to maintain the cable in a superconducting state, it is necessary to keep the cable cool. Therefore, it has been pro...

Claims

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Application Information

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IPC IPC(8): H01B12/14F16L9/18F16L59/075H01L39/04H02G15/34
CPCH02G15/34H01B12/14H01B7/2806H01B7/292Y02E40/60H10N60/81F16L59/075F16L9/18Y10S505/886F16L58/02F16L59/065
Inventor 石黑康英佐藤昭夫坂下重人
Owner JFE STEEL CORP
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