JP2009224200A - Insulating joint for refrigerant piping, and forced cooling superconducting coil - Google Patents

Insulating joint for refrigerant piping, and forced cooling superconducting coil Download PDF

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JP2009224200A
JP2009224200A JP2008067868A JP2008067868A JP2009224200A JP 2009224200 A JP2009224200 A JP 2009224200A JP 2008067868 A JP2008067868 A JP 2008067868A JP 2008067868 A JP2008067868 A JP 2008067868A JP 2009224200 A JP2009224200 A JP 2009224200A
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refrigerant
insulating
flow path
pipe
joint
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Kazunari Nakamoto
一成 中本
Hiroshi Yanagi
寛 柳
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Toshiba Corp
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Toshiba Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

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  • Superconductors And Manufacturing Methods Therefor (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of an insulating joint for refrigerant piping which is compact in spite of having a long insulation distance, and can minimize damages even when leakage or breakage occurs at a joint part. <P>SOLUTION: The insulating joint for refrigerant piping is equipped with a flow passage redundant device (5) which is installed in the middle of piping (10a, 10b) for transporting a coolant therethrough, has electrically insulating properties, and gives redundancy to a coolant flow passage, and shielding bodies (7) with the electrically insulating properties which cover the outer periphery of this flow passage redundant device (5). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、強制冷却方式超電導コイル等に液体ヘリウム等の冷媒を供給あるいは排出するための冷媒配管用絶縁継手および前記冷媒配管用絶縁継手を備えた強制冷却超電導コイルに関する。   The present invention relates to an insulation joint for refrigerant piping for supplying or discharging a refrigerant such as liquid helium to a forced cooling superconducting coil or the like, and a forced cooling superconducting coil provided with the insulation joint for refrigerant piping.

超電導コイルは、超電導線を液体ヘリウムなどの極低温の冷媒で冷却して超電導状態にして電気を流してマグネットやリアクトルとして使用している。通常の超電導線を巻いてコイルにし容器に入れて冷媒に漬ける方式では、大型の超電導コイルの場合には大型の容器が必要になる。この問題を解決するために、近年、大型の超電導コイルでは、配管内に超電導線を収めて、配管内に冷媒を強制的に流し、超電導状態にする方式が増えてきている。この方式の超電導コイルに冷媒を供給するためには、超電導コイル本体の電位と冷媒供給系統の電位を分けるために冷媒供給配管に絶縁継手を設けて、超電導コイル本体の電位と冷媒供給系統の電位を分離する必要がある（特許文献１）。   The superconducting coil is used as a magnet or a reactor by cooling the superconducting wire with a cryogenic refrigerant such as liquid helium to make it superconducting and flowing electricity. In the method of winding a normal superconducting wire into a coil, putting it in a container and dipping it in a refrigerant, a large container is required in the case of a large superconducting coil. In order to solve this problem, in recent years, an increasing number of large superconducting coils have a superconducting wire placed in a pipe and a refrigerant is forced to flow in the pipe so as to be in a superconducting state. In order to supply the refrigerant to the superconducting coil of this system, an insulating joint is provided in the refrigerant supply pipe in order to separate the electric potential of the superconducting coil body and the electric potential of the refrigerant supply system, and the electric potential of the superconducting coil main body and the electric potential of the refrigerant supply system Need to be separated (Patent Document 1).

図３に従来の代表的な絶縁継手の構造を示す。絶縁管１はガラス繊維強化プラスチックやセラミックスで製作され、絶縁管１には金属製の接続管２が樹脂接着あるいはロー付けによって接続され、接続管２には熱収縮による応力の発生を低減させるためにベローズ３が接続されている。冷媒配管１０ａ，１０ｂの端部のフランジ１１ａ，１１ｂ間はガラス繊維強化プラスチック等の絶縁材からなるスタッドボルト４で連結され、絶縁管１と接続管２およびベローズ３に曲げなどの力が加わらないようになっている。
特開平４−３３２４１１号公報 FIG. 3 shows the structure of a typical conventional insulation joint. The insulating tube 1 is made of glass fiber reinforced plastic or ceramics. A metal connecting tube 2 is connected to the insulating tube 1 by resin bonding or brazing, and the connecting tube 2 is reduced in the generation of stress due to heat shrinkage. Is connected to the bellows 3. The flanges 11a and 11b at the ends of the refrigerant pipes 10a and 10b are connected by a stud bolt 4 made of an insulating material such as glass fiber reinforced plastic, and a force such as bending is not applied to the insulating pipe 1, the connecting pipe 2 and the bellows 3. It is like that.
JP-A-4-332411

従来の絶縁継手では、高い絶縁性を得るためには絶縁管を長くする必要があり、大きなスペースを必要とする。また、絶縁管の破損や漏洩が生じたときには、超電導コイルと絶縁継手が設置された真空容器内部全体の真空破壊を生じることとなる。   In the conventional insulating joint, in order to obtain high insulation, it is necessary to lengthen the insulating tube, and a large space is required. In addition, when the insulation tube is broken or leaked, the entire vacuum vessel in which the superconducting coil and the insulating joint are installed is vacuum broken.

そこで本発明は、長い絶縁距離を有するにもかかわらずコンパクトで、継手部の漏洩や破損が生じた場合でも被害を最小限に留めることの出来る冷媒配管用絶縁継手および強制冷却超電導コイルを提供することを目的とする。   Therefore, the present invention provides an insulating joint for refrigerant piping and a forced cooling superconducting coil that are compact in spite of having a long insulation distance and can minimize damage even when the joint portion leaks or breaks. For the purpose.

上記の課題を解決するため本発明の冷媒配管用絶縁継手は、冷媒を移送する配管の途中に設けられ電気絶縁性を有するとともに冷媒流路に冗長性を与える流路冗長化装置と、この流路冗長化装置の外周を覆う電気絶縁性の遮蔽体とを備えている構成とする。
本発明の強制冷却超電導コイルは、配管内に収められた超電導線と、前記配管に接続された前記冷媒配管用絶縁継手とを備えている構成とする。 In order to solve the above problems, an insulating joint for refrigerant pipes of the present invention includes a flow path redundancy device that is provided in the middle of a pipe for transferring a refrigerant, has electrical insulation properties, and provides redundancy to the refrigerant flow path. It is set as the structure provided with the electrically insulating shield which covers the outer periphery of a path | route redundancy apparatus.
The forced cooling superconducting coil of the present invention includes a superconducting wire housed in a pipe and the refrigerant pipe insulating joint connected to the pipe.

本発明によれば、長い絶縁距離を有するにもかかわらずコンパクトで、継手部の漏洩や破損が生じた場合でも被害を最小限に留めることの出来る冷媒配管用絶縁継手および強制冷却超電導コイルを提供することができる。   According to the present invention, there are provided an insulating joint for refrigerant piping and a forced cooling superconducting coil that are compact in spite of having a long insulation distance and can minimize damage even when the joint portion leaks or breaks. can do.

以下本発明の冷媒配管用絶縁継手および強制冷却超電導コイルの２つの実施の形態を図面を参照して説明する。
（第１の実施の形態）
本発明の第１の実施の形態の冷媒配管用絶縁継手は、図１に示すように、冷媒配管１０ａに接続されたベローズ３と、ベローズ３に接続された接続管２と、内部に渦巻状の冷媒流路６ａが形成され接続管２と冷媒配管１０ｂとの間に接続された流路冗長化装置である絶縁円盤５と、冷媒配管１０ａ，１０ｂの端部に形成されたフランジ１１ａ，１１ｂの外周部に取り付けられてベローズ３と接続管２と絶縁円盤５の外周を覆う遮蔽体である外筒７とから構成されている。絶縁円盤５は、両側面に冷媒流路６ａが形成された円柱体５ｃと、この円柱体５ｃの両側面に接合された端板５ａ，５ｂとから成っている。絶縁円盤５と外筒７はガラス繊維強化プラスチック等の絶縁材料で作られている。冷媒は、冷媒配管１０ａからベローズ３、接続管２および絶縁円盤５内の冷媒流路６ａを通って冷媒配管１０ｂへ、あるいはその逆に流れる。 Hereinafter, two embodiments of an insulating joint for refrigerant piping and a forced cooling superconducting coil of the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 1, the insulating joint for refrigerant piping of the first embodiment of the present invention has a bellows 3 connected to the refrigerant piping 10a, a connecting pipe 2 connected to the bellows 3, and a spiral shape inside. The refrigerant flow path 6a is formed and the insulating disk 5 is a flow path redundancy device connected between the connecting pipe 2 and the refrigerant pipe 10b, and flanges 11a and 11b formed at the ends of the refrigerant pipes 10a and 10b. It is comprised from the outer cylinder 7 which is a shield which is attached to the outer peripheral part of this, and covers the outer periphery of the bellows 3, the connection pipe 2, and the insulation disk 5. As shown in FIG. The insulating disk 5 includes a cylindrical body 5c having refrigerant flow paths 6a formed on both side surfaces, and end plates 5a and 5b joined to both side surfaces of the cylindrical body 5c. The insulating disk 5 and the outer cylinder 7 are made of an insulating material such as glass fiber reinforced plastic. The refrigerant flows from the refrigerant pipe 10a to the refrigerant pipe 10b through the bellows 3, the connecting pipe 2, and the refrigerant flow path 6a in the insulating disk 5 or vice versa.

本実施の形態の冷媒配管用絶縁継手は絶縁円盤５内に渦巻状に形成された冷媒流路６ａを備えているので、所定の軸方向長さに対して長い絶縁距離を得ることができる。また、ベローズ３と接続管２と絶縁円盤５の外周を覆う外筒７を備えているので、ベローズ３や接続管２、あるいは絶縁円盤５に漏洩や破損が生じた場合にも冷媒の流出を最小限に抑えることができる。   Since the insulating joint for refrigerant piping of the present embodiment includes the refrigerant flow path 6a formed in a spiral shape in the insulating disk 5, a long insulating distance can be obtained with respect to a predetermined axial length. Moreover, since the outer cylinder 7 which covers the outer periphery of the bellows 3, the connecting pipe 2, and the insulating disk 5 is provided, even if the bellows 3, the connecting pipe 2, or the insulating disk 5 is leaked or damaged, the refrigerant flows out. Can be minimized.

（第２の実施の形態）
本発明の第２の実施の形態の冷媒配管用絶縁継手は、図２に示すように、冷媒配管１０ａに接続されたベローズ３と、ベローズ３に接続された接続管２と、内部に軸方向に冷媒流路６ｂが往復形成され接続管２と冷媒配管１０ｂとの間に接続された流路冗長化装置である絶縁円筒８と、冷媒配管１０ａ，１０ｂの端部に形成されたフランジ１１ａ，１１ｂの外周部に取り付けられてベローズ３と接続管２と絶縁円筒８の外周を覆う遮蔽体である外筒７とから構成されている。絶縁円筒８は、端板８ａ，８ｂの間に流路６ｂを折返し取り付け、その外周に円筒体８ｃを設けた構成になっている。絶縁円筒８と外筒７はガラス繊維強化プラスチック等の絶縁材料で作られている。冷媒は、冷媒配管１０ａからベローズ３、接続管２および絶縁円筒８内の冷媒流路６ｂを通って冷媒配管１０ｂへ、あるいはその逆に流れる。 (Second Embodiment)
As shown in FIG. 2, the insulating joint for refrigerant piping of the second embodiment of the present invention includes a bellows 3 connected to the refrigerant piping 10a, a connecting pipe 2 connected to the bellows 3, and an axial direction inside. The refrigerant flow path 6b is reciprocally formed between the connecting pipe 2 and the refrigerant pipe 10b. The insulating cylinder 8 is a flow path redundancy device, and flanges 11a and 10b formed at the ends of the refrigerant pipes 10a and 10b. It is comprised from the outer cylinder 7 which is a shield attached to the outer peripheral part of 11b, and covers the outer periphery of the bellows 3, the connection pipe 2, and the insulation cylinder 8. As shown in FIG. The insulating cylinder 8 has a configuration in which the flow path 6b is folded between the end plates 8a and 8b, and the cylindrical body 8c is provided on the outer periphery thereof. The insulating cylinder 8 and the outer cylinder 7 are made of an insulating material such as glass fiber reinforced plastic. The refrigerant flows from the refrigerant pipe 10a to the refrigerant pipe 10b through the bellows 3, the connection pipe 2, and the refrigerant flow path 6b in the insulating cylinder 8, or vice versa.

本実施の形態の冷媒配管用絶縁継手は絶縁円筒８内に往復形成された冷媒流路６ｂを備えているので、所定の軸方向長さに対して長い絶縁距離を得ることができる。また、ベローズ３と接続管２と絶縁円筒８の外周を覆う外筒７を備えているので、ベローズ３や接続管２、あるいは絶縁円筒８に漏洩や破損が生じた場合にも冷媒の流出を最小限に抑えることができる。   Since the insulating joint for refrigerant piping of the present embodiment includes the refrigerant flow path 6b reciprocally formed in the insulating cylinder 8, a long insulating distance can be obtained with respect to a predetermined axial length. Moreover, since the outer cylinder 7 which covers the outer periphery of the bellows 3, the connecting pipe 2, and the insulating cylinder 8 is provided, even if the bellows 3, the connecting pipe 2, or the insulating cylinder 8 is leaked or damaged, the refrigerant flows out. Can be minimized.

なお、本発明の実施の形態の強制冷却超電導コイルは図示していないが、配管内に収められた超電導線と、前記配管に接続された上記第１の実施の形態あるいは第２の実施の形態の冷媒配管用絶縁継手とを備えた構成である。このような構成を有することによって、本発明の実施の形態の強制冷却超電導コイルはコンパクトかつ冷媒流出の被害を最小限に留めることができる。   Although the forced cooling superconducting coil of the embodiment of the present invention is not shown, the superconducting wire housed in the pipe and the first embodiment or the second embodiment connected to the pipe. It is the structure provided with the insulated joint for refrigerant | coolant piping. By having such a configuration, the forced cooling superconducting coil according to the embodiment of the present invention is compact and can minimize the damage of the refrigerant outflow.

本発明の第１の実施の形態の冷媒配管用絶縁継手の構成を示し、（ａ）は軸方向断面図、（ｂ）は（ａ）のｂ−ｂ線に沿う断面図。The structure of the insulated joint for refrigerant | coolant piping of the 1st Embodiment of this invention is shown, (a) is axial sectional drawing, (b) is sectional drawing which follows the bb line of (a). 本発明の第２の実施の形態の冷媒配管用絶縁継手の構成を示し、（ａ）は軸方向断面図、（ｂ）は（ａ）のｂ−ｂ線に沿う断面図。The structure of the insulation coupling for refrigerant | coolant piping of the 2nd Embodiment of this invention is shown, (a) is an axial sectional view, (b) is sectional drawing which follows the bb line of (a). 従来の冷媒配管用絶縁継手の構成を示す軸方向断面図。The axial direction sectional view which shows the structure of the conventional insulated joint for refrigerant | coolant piping.

符号の説明Explanation of symbols

１…絶縁管、２…接続管、３…ベローズ、４…スタッドボルト、５…絶縁円盤、５ａ，５ｂ…端板、５ｃ…円柱体、６ａ，６ｂ…冷媒流路、７…外筒、８…絶縁円筒、８ａ，８ｂ…端板、８ｃ…円筒体、１０ａ，１０ｂ…冷媒配管、１１ａ，１１ｂ…フランジ。   DESCRIPTION OF SYMBOLS 1 ... Insulating pipe, 2 ... Connection pipe, 3 ... Bellows, 4 ... Stud bolt, 5 ... Insulating disk, 5a, 5b ... End plate, 5c ... Cylindrical body, 6a, 6b ... Refrigerant flow path, 7 ... Outer cylinder, 8 Insulating cylinder, 8a, 8b ... end plate, 8c ... cylindrical body, 10a, 10b ... refrigerant pipe, 11a, 11b ... flange.

Claims (5)

冷媒を移送する配管の途中に設けられ電気絶縁性を有するとともに冷媒流路に冗長性を与える流路冗長化装置と、この流路冗長化装置の外周を覆う電気絶縁性の遮蔽体とを備えていることを特徴とする冷媒配管用絶縁継手。   A flow path redundancy device that is provided in the middle of a pipe for transferring the refrigerant and has electrical insulation and provides redundancy to the refrigerant flow path, and an electrical insulation shield that covers the outer periphery of the flow path redundancy device An insulating joint for refrigerant piping. 前記流路冗長化装置は、内部に渦巻状の冷媒流路を有する円盤を備えていることを特徴とする請求項１記載の冷媒配管用絶縁継手。   The insulating joint for refrigerant piping according to claim 1, wherein the flow path redundancy device includes a disk having a spiral refrigerant flow path therein. 前記流路冗長化装置は、円筒と、この円筒の内部軸方向に往復させて設けられた冷媒流路とを備えていることを特徴とする請求項１記載の冷媒配管用絶縁継手。   The insulating joint for refrigerant piping according to claim 1, wherein the flow path redundancy device includes a cylinder and a refrigerant flow path provided by reciprocating in an inner axial direction of the cylinder. 前記遮蔽体は、前記冷媒を移送する配管の端部に設けられたフランジに取り付けられた円筒であることを特徴とする請求項１記載の冷媒配管用絶縁継手。   2. The insulated joint for refrigerant piping according to claim 1, wherein the shield is a cylinder attached to a flange provided at an end portion of the piping for transferring the refrigerant. 配管内に収められた超電導線と、前記配管に接続された請求項１ないし４のいずれかに記載の冷媒配管用絶縁継手とを備えていることを特徴とする強制冷却超電導コイル。   A forced cooling superconducting coil comprising: a superconducting wire housed in a pipe; and the refrigerant pipe insulating joint according to any one of claims 1 to 4 connected to the pipe.
JP2008067868A 2008-03-17 2008-03-17 Insulating joint for refrigerant piping, and forced cooling superconducting coil Pending JP2009224200A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012141010A (en) * 2010-12-28 2012-07-26 Sumitomo Electric Ind Ltd Multilayer insulating joint and double tube connection structure
JP2016018902A (en) * 2014-07-09 2016-02-01 株式会社日立メディコ Superconducting electromagnet device
WO2019172343A1 (en) * 2018-03-07 2019-09-12 学校法人中部大学 Superconducting cable and method for laying same
US11482353B2 (en) 2018-03-07 2022-10-25 Chubu University Educational Foundation Superconducting cable and installation method of the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012141010A (en) * 2010-12-28 2012-07-26 Sumitomo Electric Ind Ltd Multilayer insulating joint and double tube connection structure
JP2016018902A (en) * 2014-07-09 2016-02-01 株式会社日立メディコ Superconducting electromagnet device
WO2019172343A1 (en) * 2018-03-07 2019-09-12 学校法人中部大学 Superconducting cable and method for laying same
US11482353B2 (en) 2018-03-07 2022-10-25 Chubu University Educational Foundation Superconducting cable and installation method of the same

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