Fixation structure of superconducting cable and fixation structure of superconducting cable line

Patent metadata

Field	Value
Publication number	US-9070494-B2
Application number	US-201213816883-A
Country	US
Kind code	B2
Filing date	Mar 16, 2012
Priority date	Mar 17, 2011
Publication date	Jun 30, 2015
Grant date	Jun 30, 2015

Abstract

A fixation structure for fixing a superconducting cable including a cable core and a thermal insulation tube. The fixation structure includes a fixation box connected to the thermal insulation tube, including a hollow thermal insulation structure, and through which the cable core is passed, a fixation body for fixing the cable core on the inner wall of the fixation box, and a diameter-expanded reinforcement layer that is an electrical insulation layer that has a diameter decreasing toward both ends and is formed on the cable core. A refrigerant flows through the inside of the inner wall of the fixation box. The cable core is fixed on the inner wall with the fixation body through the diameter-expanded reinforcement layer. The structure implements a simple and low-cost fixation structure appropriate for an electric field design.

First claim

The invention claimed is:

1. A fixation structure of a superconducting cable comprising a cable core which comprises a former and a superconductor layer, and a thermal insulation tube housing the cable core and having a thermal insulation structure configured of an internal tube and an external tube, the fixation structure comprising:
a fixation box connected to the thermal insulation tube, having a thermal insulation structure configured of an inner wall and an outer wall, through which the cable core penetrates;
a fixation body for fixing the cable core on the inner wall of the fixation box; and
a diameter-expanded reinforcement layer, the diameter-expanded reinforcement layer being electrically insulating, being formed on the cable core and having a diameter decreasing toward both ends, wherein an entire length of the diameter-expanded reinforcement layer is formed on the cable core;
wherein a refrigerant can flow through an inside of the inner wall of the fixation box, and
the cable core is fixed on the inner wall with a fixation body through the diameter-expanded reinforcement layer.

2. The fixation structure of a superconducting cable according to claim 1 ,
wherein the fixation body comprises a sleeve having a shape corresponding to a shape of an outer surface of the diameter-expanded reinforcement layer.

3. The fixation structure of a superconducting cable according to claim 1 or 2 , further comprising a reinforcement layer around the diameter-expanded reinforcement layer, and
wherein the fixation body holds the diameter-expanded reinforcement layer through the reinforcement layer.

4. The fixation structure of a superconducting cable according to claim 1 or 2 further comprising a connection portion for bonding and connecting the cable core to the fixation body.

5. The fixation structure of a superconducting cable according to claim 1 ,
wherein the cable core comprises an electrical insulation layer on an outer surface of the superconductor layer and an intermediate connecting portion having a connecting portion of the electrical insulation layer in the fixation box, and
the diameter-expanded reinforcement, which is larger than an outside diameter of the electrical insulation layer at a portion other than the intermediate connecting portion, is formed at an outer surface of the connecting portion of the electrical insulation layer in the intermediate connecting portion.

6. The fixation structure of a superconducting cable according to claim 5 , wherein the diameter-expanded reinforcement layer is layered to cover the electrical insulation layer layered between tapered electrical insulation layers of two cable cores in the intermediate connecting portion, the tapered electrical insulation layers and a splice of the insulation layer layered between the electrical insulation layers.

7. The fixation structure of a superconducting cable according to claim 5 or 6 ,
wherein a kind of insulating papers is wound around the diameter-expanded reinforcement layer.

8. The fixation structure of a superconducting cable according to claim 1 or 2 , further comprising at least one auxiliary fixation body for fixing the cable core on the inner wall,
wherein the auxiliary fixation body is fixed on the inner wall with a rod-shaped or block-shaped fixing bracket through a metal ring holding an outer circumference of the cable core.

9. The fixation structure of a superconducting cable according to claim 1 or 2 ,
wherein the fixation body is fixed on the inner wall with a rod-shaped or block-shaped fixing bracket through a sleeve covering an outer surface of the cable core.

10. The fixation structure of a superconducting cable according to claim 1 ,
wherein the fixation body is fixed on the inner wall while dividing an interior region of the fixation box into two,
one or more refrigerant flowing holes are formed on the fixation box at both sides with respect to the fixation body, and the inner wall and the outer wall are connected at the refrigerant flowing hole.

11. The fixation structure of a superconducting cable according to claim 10 ,
wherein a refrigerant transporting tube is connected to the refrigerant flowing hole.

12. The fixation structure of a superconducting cable according to claim 11 ,
wherein the refrigerant flowing holes that are formed at both sides with respect to the fixation body are connected to each other through the refrigerant transporting tube.

13. A fixation structure of a superconducting cable line that fixes a plurality of superconducting cables using the fixation structure according to claim 11 ,
wherein each of the superconducting cables comprises a fixation box, and the fixation boxes are connected to each other through the refrigerant transporting tube connected to the refrigerant flowing hole.

14. The fixation structure of a superconducting cable line according to claim 13 ,
wherein a refrigerant in the fixation boxes does not flow from one side to an other side of the fixation body along the superconducting cable, instead the refrigerant flows to the other fixation box through the refrigerant transporting tube connected to the refrigerant flowing hole.

15. A fixation structure of a superconducting cable line using the fixation structure according to claim 10 or 11 ,
wherein a plurality of superconducting cables are placed in parallel, and circulating cooling sections are installed for the superconducting cables at predetermined intervals through the fixation box,
the circulating cooling section comprising;
a first refrigerant pathway connecting with refrigerant pathways of the superconducting cables,
a second refrigerant pathway connecting with refrigerant pathways of the other superconducting cables, and
a refrigerator for cooling the refrigerant circulated in the first refrigerant pathway and the second refrigerant pathway, respectively,
wherein each of the first refrigerant pathway and the second refrigerant pathway connects the fixation boxes through the respective refrigerant flowing holes at both sides of the fixation box with respect to the fixation body.

16. The fixation structure of a superconducting cable line according to claim 15 ,
wherein the circulating cooling section comprises a circulation pump of the refrigerant at only one of the first refrigerant pathway and the second refrigerant pathway.

17. The fixation structure of a superconducting cable line according to claim 15 ,
wherein the circulating cooling section comprises an input pathway passing into a cooling portion of the refrigerator and a bypass pathway avoiding the refrigerator at each of the first refrigerant pathway and the second refrigerant pathway,
a temperature of the refrigerant is controlled by adjusting flows of the refrigerants of the input pathway and of the bypass pathway.

18. The fixation structure of a superconducting cable line according to claim 15 ,
wherein each of the first refrigerant pathway and the second refrigerant pathway of the circulating cooling section leads the refrigerant from a superconducting cable to a different superconducting cable through the refrigerant pathway.

19. The fixation structure of a superconducting cable line according to claim 15 ,
wherein each of the first refrigerant pathway and the second refrigerant pathway of the circulating cooling section leads the refrigerant from a superconducting cable to the same superconducting cable through the refrigerant pathway.

Assignees

• Teng Jun
• Yagi Masashi
• Matsuoka Taro
• Mukoyama Shinichi
• Yonemura Shuka
• Furukawa Electric Co Ltd

Inventors

• Teng Jun
• Yagi Masashi
• Matsuoka Taro
• Yonemura Tokui
• Mukoyama Shinichi

Classifications

• H01B12/16

  characterised by cooling · CPC title

• H01B12/02 Primary

  characterised by their form · CPC title

• H02G15/34 Primary

  Cable fittings for cryogenic cables {(superconductive cables per se H01B12/00)} · CPC title

• Y02E40/648

  Cross-Sectional Technologies · mapped topic

• Y02E40/647

  Cross-Sectional Technologies · mapped topic