JPH1070828A - Terminal structure of cryogenic cable - Google Patents
Terminal structure of cryogenic cableInfo
- Publication number
- JPH1070828A JPH1070828A JP24415696A JP24415696A JPH1070828A JP H1070828 A JPH1070828 A JP H1070828A JP 24415696 A JP24415696 A JP 24415696A JP 24415696 A JP24415696 A JP 24415696A JP H1070828 A JPH1070828 A JP H1070828A
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- cryogenic
- cryogenic cable
- terminal structure
- refrigerant liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 239000003507 refrigerant Substances 0.000 claims abstract description 27
- 239000004020 conductor Substances 0.000 claims abstract description 21
- 239000011247 coating layer Substances 0.000 claims abstract description 9
- 238000009835 boiling Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 238000009834 vaporization Methods 0.000 abstract description 3
- 230000008016 vaporization Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 22
- 239000007789 gas Substances 0.000 description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 15
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 238000009413 insulation Methods 0.000 description 6
- 238000000605 extraction Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 239000012212 insulator Substances 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Gas Or Oil Filled Cable Accessories (AREA)
Abstract
(57)【要約】
【課題】 冷媒液体の気化による蒸発ガスの発生を防止
した信頼度の高い極低温ケーブルの端末構造を提供す
る。
【解決手段】 極低温ケーブルの導体を極低温部から常
温に引出す導体引出し棒に、絶縁被覆層及びストレスコ
ーンを設けた極低温ケーブルの端末構造において、上記
導体引出し棒を冷却する冷媒液体を、該冷媒液体より沸
点の低いガスで加圧する極低温ケーブルの端末構造。
(57) [Problem] To provide a highly reliable terminal structure of a cryogenic cable that prevents generation of evaporative gas due to vaporization of a refrigerant liquid. SOLUTION: In a terminal structure of a cryogenic cable in which an insulating coating layer and a stress cone are provided on a conductor drawing rod for drawing a conductor of a cryogenic cable from a cryogenic part to room temperature, a refrigerant liquid for cooling the conductor drawing rod is provided. A terminal structure of a cryogenic cable pressurized with a gas having a lower boiling point than the refrigerant liquid.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電力用送電ケーブル
に用いられる極低温ケーブルの端末構造に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal structure of a cryogenic cable used for an electric power transmission cable.
【０００２】[0002]
【従来の技術】図２（イ）は従来の極低温ケーブルの端
末構造の一例の縦断面図、図２（ロ）は問題点の説明図
である。極低温ケーブルの端末はケーブル本体と端末部
との冷却が切分けられている。高圧の液体窒素等の冷媒
液体で冷却されている超電導ケーブルの如き極低温ケー
ブル本体１の導体２は、上記極低温ケーブル本体１の端
部を覆うＦＲＰ套管１Ａを貫通し、導体引出し棒３と接
続されている。そして、該導体引出し棒３は、真空断熱
層７で囲われた容器内の液体窒素等の冷媒液体層８及び
窒素ガス等の冷媒ガス層９を通り、鉛直方向に延びてフ
ランジ１２を貫通して碍子１０内部に充填されたＳＦ６
等の流体絶縁層１１を経て外部に引出されている。上記
導体引出し棒３は冷媒液体層８の液面付近から流体絶縁
層１１の途中まで、エチレンプロピレンゴム等による絶
縁被覆層４が施されており、さらに上記絶縁被覆層４の
両端部付近にはストレスコーン５、６が装着されてい
る。2. Description of the Related Art FIG. 2A is a longitudinal sectional view of an example of a conventional terminal structure of a cryogenic cable, and FIG. 2B is an explanatory view of a problem. In the terminal of the cryogenic cable, the cooling of the cable body and the terminal is separated. A conductor 2 of a cryogenic cable body 1 such as a superconducting cable cooled by a refrigerant liquid such as high-pressure liquid nitrogen penetrates an FRP sleeve 1A covering an end of the cryogenic cable body 1 and a conductor extraction rod 3 Is connected to The conductor extraction rod 3 extends vertically through the refrigerant liquid layer 8 such as liquid nitrogen and the refrigerant gas layer 9 such as nitrogen gas in the container surrounded by the vacuum heat insulating layer 7 and penetrates the flange 12. SF6 filled inside the insulator 10
And the like are drawn out through a fluid insulating layer 11. The conductor drawing rod 3 is provided with an insulating coating layer 4 of ethylene propylene rubber or the like from near the liquid surface of the refrigerant liquid layer 8 to the middle of the fluid insulating layer 11, and further near both ends of the insulating coating layer 4. Stress cones 5 and 6 are mounted.
【０００３】[0003]
【発明が解決しようとする課題】上記構造の極低温ケー
ブルの端末においては、冷媒液体層８内に位置する絶縁
被覆層４及びストレスコーン５の下端部が、図２（ロ）
に示すように導体引出し棒１の軸方向と垂直方向に形成
されているので、冷媒液体が侵入熱や導体引出し棒３の
ジュール熱で気化した場合、図２（ロ）のＡ部及びＢ部
にその蒸発ガスが溜まる可能性がある。蒸発ガスと液体
との絶縁強度は一般に蒸発ガスの方が小さく、例えば窒
素の場合、液体では４５ＫＶ／ｍｍ、蒸発ガスでは５Ｋ
Ｖ／ｍｍでその比は９：１である。この蒸発ガスが冷媒
液体層８に停渫することにより、絶縁強度が低下し絶縁
破壊に至る危険性がある。In the terminal of the cryogenic cable having the above-mentioned structure, the lower end portions of the insulating coating layer 4 and the stress cone 5 located in the refrigerant liquid layer 8 are formed as shown in FIG.
As shown in FIG. 2, since the refrigerant liquid is formed in a direction perpendicular to the axial direction of the conductor extraction rod 1, when the refrigerant liquid is vaporized by invasion heat or Joule heat of the conductor extraction rod 3, portions A and B in FIG. There is a possibility that the evaporative gas accumulates. In general, the insulation strength between the evaporative gas and the liquid is smaller in the case of the evaporative gas.
In V / mm, the ratio is 9: 1. When this vaporized gas is suspended in the refrigerant liquid layer 8, there is a danger that insulation strength is reduced and dielectric breakdown is caused.
【０００４】[0004]
【課題を解決するための手段】本発明は上述の問題点を
解消し、冷媒液体の気化による蒸発ガスの発生を防止し
た極低温ケーブルの端末構造を提供するもので、その特
徴は、極低温ケーブルの導体を極低温部から常温部に引
出す導体引出し棒に、絶縁被覆層及びストレスコーンを
設けた極低温ケーブルの端末構造において、上記導体引
出し棒を冷却する冷媒液体を、該冷媒液体より沸点の低
いガスで加圧する極低温ケーブルの端末構造にある。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and provides a terminal structure of a cryogenic cable in which the generation of evaporative gas due to the vaporization of refrigerant liquid is provided. In a terminal structure of a cryogenic cable, in which an insulating coating layer and a stress cone are provided on a conductor drawing rod for drawing a cable conductor from a cryogenic part to a room temperature part, a refrigerant liquid for cooling the conductor drawing rod has a boiling point higher than the refrigerant liquid. The terminal structure of a cryogenic cable pressurized with a gas having a low temperature.
【０００５】[0005]
【発明の実施の形態】図１は本発明の極低温ケーブルの
端末構造の具体例の縦断面図である。なお、図面におい
て図２（イ）と同一符号は同一部位をあらわしている。
極低温ケーブル本体１の導体２は上記極低温ケーブル本
体１の端部を覆うＦＲＰ套管１Ａを貫通して導体引出し
棒３と接続されている。該導体引出し棒３は真空断熱層
７で囲われた容器内の冷媒液体層８及び冷媒ガス層９を
通り、鉛直方向に延びてフランジ１２を貫通して碍子１
０内部に充填されたＳＦ６等の流体絶縁層１１を経て外
部に引出されている。上記導体引出し棒３は冷媒液体層
８の液面付近から流体絶縁層１１の途中まで絶縁被覆層
４が施されており、さらに上記絶縁被覆層４の両端部付
近にはストレスコーン５、６が装着されている。FIG. 1 is a longitudinal sectional view of a specific example of a terminal structure of a cryogenic cable according to the present invention. In the drawings, the same reference numerals as those in FIG. 2A denote the same parts.
The conductor 2 of the cryogenic cable main body 1 penetrates the FRP sleeve 1A that covers the end of the cryogenic cable main body 1, and is connected to the conductor drawing rod 3. The conductor extraction rod 3 extends vertically through the refrigerant liquid layer 8 and the refrigerant gas layer 9 in the container surrounded by the vacuum insulation layer 7, penetrates through the flange 12, and
0 is drawn out through a fluid insulating layer 11 such as SF6 filled inside. The conductor withdrawal rod 3 is provided with an insulating coating layer 4 from near the liquid surface of the refrigerant liquid layer 8 to the middle of the fluid insulating layer 11, and stress cones 5 and 6 are provided near both ends of the insulating coating layer 4. It is installed.
【０００６】本発明の端末構造においては、上記冷媒ガ
ス層９にガス加圧装置１３が接続されており、該加圧装
置１３を通じてガスを供給して冷媒液体層８を加圧す
る。加圧するのに使用するガスとしては液体窒素より沸
点の低い、例えばヘリウム、水素、ネオン等が用いられ
る。このようにガスにて液体窒素等を加圧することによ
り、例えば液体窒素の圧力が２気圧になれば、沸点は大
気圧の約７７Ｋから約８４Ｋに上昇する。従って液体窒
素の温度が８４Ｋに達するまでは蒸発が起らず、ガスの
発生がなくなる。In the terminal structure of the present invention, a gas pressurizing device 13 is connected to the refrigerant gas layer 9, and gas is supplied through the pressurizing device 13 to pressurize the refrigerant liquid layer 8. As a gas used for pressurization, helium, hydrogen, neon, or the like having a lower boiling point than liquid nitrogen is used. By pressurizing liquid nitrogen or the like with a gas as described above, for example, when the pressure of liquid nitrogen becomes 2 atm, the boiling point increases from the atmospheric pressure of about 77K to about 84K. Therefore, no evaporation occurs until the temperature of the liquid nitrogen reaches 84 K, and no gas is generated.
【０００７】又侵入熱やジュール熱が長時間発生する場
合は、液体窒素等の冷媒液体の温度は徐々に上昇し、い
ずれはその圧力での沸点に達する。従って、図１に示す
ように冷媒液体層８に熱交換部１５を介して冷凍機１４
を取付け、熱交換部１５を通じて冷媒液体層８を冷却
し、その冷凍機１４の能力を侵入熱やジュール熱と同等
にすれば、冷媒液体層８の温度上昇は起らず、気化によ
る蒸発ガスはなくなる。[0007] When the intrusion heat or Joule heat is generated for a long time, the temperature of the refrigerant liquid such as liquid nitrogen gradually rises, and eventually reaches the boiling point at that pressure. Therefore, as shown in FIG.
If the refrigerant liquid layer 8 is cooled through the heat exchange section 15 and the capacity of the refrigerator 14 is made equal to the intrusion heat or Joule heat, the temperature of the refrigerant liquid layer 8 does not rise, and the evaporative gas Is gone.
【０００８】[0008]
【発明の効果】以上説明したように、本発明の極低温ケ
ーブルの端末構造によれば、冷媒液体の気化による蒸発
ガスの発生はなく、これによる絶縁性能の低下もなくな
って信頼性の高い端末部が得られる。As described above, according to the terminal structure of the cryogenic cable of the present invention, there is no generation of evaporative gas due to the vaporization of the refrigerant liquid, and there is no decrease in insulation performance due to this. Part is obtained.
【図１】本発明の極低温ケーブルの端末構造の具体例の
縦断面図である。FIG. 1 is a longitudinal sectional view of a specific example of a terminal structure of a cryogenic cable according to the present invention.
【図２】図２（イ）は従来の極低温ケーブルの端末構造
の一例の縦断面図、図２（ロ）は問題点の説明図であ
る。FIG. 2A is a longitudinal sectional view of an example of a conventional cryogenic cable terminal structure, and FIG. 2B is an explanatory diagram of a problem.
１ 極低温ケーブル本体 ２ ケーブル導体 ３ 導体引出し棒 ４ 絶縁被覆層 ５、６ ストレスコーン ７ 真空遮断層 ８ 冷媒液体層 ９ 冷媒ガス層 10 碍子 11 流体絶縁層 12 フランジ 13 ガス加圧装置 14 冷凍機 15 熱交換部 DESCRIPTION OF SYMBOLS 1 Cryogenic cable main body 2 Cable conductor 3 Conductor lead-out rod 4 Insulation coating layer 5, 6 Stress cone 7 Vacuum barrier layer 8 Refrigerant liquid layer 9 Refrigerant gas layer 10 Insulator 11 Fluid insulation layer 12 Flange 13 Gas pressurizer 14 Refrigerator 15 Heat exchange section
───────────────────────────────────────────────────── フロントページの続き (72)発明者 長屋 重夫 愛知県名古屋市緑区大高町字北関山20番地 の１ 中部電力株式会社内 (72)発明者 下之園 隆明 愛知県名古屋市緑区大高町字北関山20番地 の１ 中部電力株式会社内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeo Nagaya 20-1 Kitakanyama, Odaka-cho, Midori-ku, Nagoya-shi, Aichi Prefecture Inside Chubu Electric Power Co., Inc. (72) Inventor Takaaki Shimonosono Midori-ku, Nagoya-shi, Aichi Otakamachi character Kita-Kanzan 20 No. 1 Chubu Electric Power Co., Inc.
Claims (1)
温部に引出す導体引出し棒に、絶縁被覆層及びストレス
コーンを設けた極低温ケーブルの端末構造において、上
記導体引出し棒を冷却する冷媒液体を該冷媒液体より沸
点の低いガスで加圧することを特徴とする極低温ケーブ
ルの端末構造。1. A refrigerant liquid for cooling a conductor of a cryogenic cable in a terminal structure of the cryogenic cable, wherein an insulating coating layer and a stress cone are provided on a conductor drawing rod for drawing a conductor of the cryogenic cable from a cryogenic part to a room temperature part. Cryogenic cable is pressurized with a gas having a lower boiling point than the refrigerant liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24415696A JP3181513B2 (en) | 1996-08-26 | 1996-08-26 | Terminal structure of cryogenic cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24415696A JP3181513B2 (en) | 1996-08-26 | 1996-08-26 | Terminal structure of cryogenic cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1070828A true JPH1070828A (en) | 1998-03-10 |
| JP3181513B2 JP3181513B2 (en) | 2001-07-03 |
Family
ID=17114603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24415696A Expired - Fee Related JP3181513B2 (en) | 1996-08-26 | 1996-08-26 | Terminal structure of cryogenic cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3181513B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006087761A1 (en) * | 2005-02-15 | 2006-08-24 | Sumitomo Electric Industries, Ltd. | End structure of superconducting cable |
| WO2011004955A1 (en) * | 2009-07-10 | 2011-01-13 | Ls Cable Ltd. | Termination structure for superconducting cable |
| WO2011152344A1 (en) * | 2010-05-31 | 2011-12-08 | 古河電気工業株式会社 | Terminal connecting section for very-low temperature cable |
| JP2012217334A (en) * | 2011-03-31 | 2012-11-08 | Furukawa Electric Co Ltd:The | Terminal connection part for cryogenic cable |
| CN112350267A (en) * | 2020-11-24 | 2021-02-09 | 上海电缆研究所有限公司 | Superconductive energy pipeline terminal thermostat |
-
1996
- 1996-08-26 JP JP24415696A patent/JP3181513B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006087761A1 (en) * | 2005-02-15 | 2006-08-24 | Sumitomo Electric Industries, Ltd. | End structure of superconducting cable |
| US7729731B2 (en) * | 2005-02-15 | 2010-06-01 | Sumitomo Electric Industries, Ltd. | Terminal structure of superconducting cable |
| EP1850436A4 (en) * | 2005-02-15 | 2011-04-13 | Sumitomo Electric Industries | SUPERCONDUCTING CABLE END STRUCTURE |
| WO2011004955A1 (en) * | 2009-07-10 | 2011-01-13 | Ls Cable Ltd. | Termination structure for superconducting cable |
| US8912446B2 (en) | 2009-07-10 | 2014-12-16 | Ls Cable Ltd. | Termination structure for superconducting cable |
| WO2011152344A1 (en) * | 2010-05-31 | 2011-12-08 | 古河電気工業株式会社 | Terminal connecting section for very-low temperature cable |
| JP5089822B2 (en) * | 2010-05-31 | 2012-12-05 | 古河電気工業株式会社 | Termination connection for cryogenic cable |
| CN102884693A (en) * | 2010-05-31 | 2013-01-16 | 古河电气工业株式会社 | Terminal connecting section for very-low temperature cable |
| JP2012217334A (en) * | 2011-03-31 | 2012-11-08 | Furukawa Electric Co Ltd:The | Terminal connection part for cryogenic cable |
| CN112350267A (en) * | 2020-11-24 | 2021-02-09 | 上海电缆研究所有限公司 | Superconductive energy pipeline terminal thermostat |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3181513B2 (en) | 2001-07-03 |
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