WO2020063384A1 - 一种用于大电流高温超导电流引线的室温端绝缘法兰 - Google Patents

一种用于大电流高温超导电流引线的室温端绝缘法兰 Download PDF

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WO2020063384A1
WO2020063384A1 PCT/CN2019/105981 CN2019105981W WO2020063384A1 WO 2020063384 A1 WO2020063384 A1 WO 2020063384A1 CN 2019105981 W CN2019105981 W CN 2019105981W WO 2020063384 A1 WO2020063384 A1 WO 2020063384A1
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flange
vacuum
insulation
sleeve
current
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PCT/CN2019/105981
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English (en)
French (fr)
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陆坤
宋云涛
刘承连
冉庆翔
丁开忠
刘辰
黄雄一
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中国科学院合肥物质科学研究院
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Publication of WO2020063384A1 publication Critical patent/WO2020063384A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
    • H01F6/065—Feed-through bushings, terminals and joints
    • 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

Definitions

  • the invention relates to the field of power supply feeders for superconducting magnets of large thermonuclear fusion devices or other large electromagnetic devices, and in particular relates to a room-temperature end insulating flange for high-current high-temperature superconducting current leads.
  • Thermonuclear fusion will provide mankind with inexhaustible clean energy, and the International Thermonuclear Fusion Test Reactor (ITER) is planned to be completed within the next ten years.
  • the high-temperature superconducting current lead powers its giant low-temperature superconducting magnet and is the main source of heat load for the magnet. Because the superconducting magnet and the current lead itself work in a low temperature and vacuum environment; and the large current lead weighs hundreds of kilograms, the connection flange of the current lead and the vacuum dewar must be able to carry its own weight; the current lead is transmitted by the superconducting magnet Current, and the vacuum Dewar is in a grounded state. In the fault state, the current lead must be able to bear 10,000 volts of insulation. Therefore, an insulating flange that can integrate high-voltage insulation, strong loads, and work under vacuum and low temperature is to ensure the normal safety of the current lead The key to running.
  • the object of the present invention is to provide a room-temperature end insulating flange for high-current high-temperature superconducting current leads, which realizes the cross-boundary vacuum of current leads and the atmospheric environment, high voltage and ground potential, connection between normal temperature and low temperature, and can carry current leads. Itself weight load.
  • a room temperature end insulating flange for a high-current high-temperature superconducting current lead includes an umbrella skirt structure, an end face flange, a flange insulation layer, an insulating sleeve, a vacuum flange, a current lead main body sleeve, and a silicone rubber ring;
  • the two ends of the insulating sleeve are sealedly connected to the end flange and the vacuum flange, respectively, and the sealing surfaces between the insulating sleeve and the end flange and the vacuum flange are tightly sealed by a silicon rubber ring, respectively.
  • the installation process is simplified under the premise; the insulation sleeve is located between the end flange and the vacuum flange, and a flange insulation layer is cured; the end flange is welded with an umbrella skirt structure, and the current lead is running in a vertical state
  • the umbrella skirt structure can effectively prevent the condensed water from the room temperature end from falling into the insulating outer surface between the high and low voltage flanges.
  • the end face flange is welded to the current lead main body sleeve, and the vacuum flange and the vacuum Dewar are sealed and connected.
  • the outer surface of the insulating sleeve is threaded, and the thread surface is coated with epoxy glue, and the end face flange and the vacuum flange are respectively connected to both ends of the insulating sleeve through threads.
  • the flange insulation layer is wrapped with an epoxy-impregnated glass ribbon and pressed in a vacuum environment so that all the air bubbles generated in the wrapping are released, and then it is heated to be cured.
  • the invention connects the high voltage and the ground potential through an insulating sleeve with sufficient strength to meet the mechanical strength and insulation withstand voltage; the thread and the silicone rubber ring seal structure are used to separate the atmosphere of the current lead from the Dewar vacuum; and the vacuum flange is used to achieve Mechanical connection of the insulating flange and vacuum-tight connection to the vacuum Dewar flange.
  • the invention works in a vacuum, low temperature, and high voltage insulation environment, and is suitable for low temperature electrophysical devices to establish a vacuum and insulation connection and support between a current lead and a low temperature dewar.
  • the invention has good application value in the field of fusion reactor and superconducting.
  • the structure of the invention is simple, but the function is complex, which guarantees the multiple functions of operation under low temperature environment, vacuum, high voltage insulation and mechanical support; each function is undertaken by different components; the insulation sleeve bears mechanical load and high potential, but works in the atmosphere At room temperature, the vacuum flange and the Dewar flange are connected to form a vacuum seal; the overall design is safe and reliable.
  • the main body of the present invention is connected by a screw structure instead of the traditional pin fastening method, and the sealing surface is sealed by a sealant and a silicone rubber ring; the insulation is cured by means of vacuum pressure to enhance the insulation performance.
  • FIG. 1 is a schematic structural diagram of the present invention.
  • a room temperature end insulating flange for a high-current high-temperature superconducting current lead includes an insulating sleeve 4 with an outer surface threaded, and one end of the insulating sleeve 4 is connected to a high-potential end flange 2 through a thread, and a sealing surface thereof
  • the silicon rubber ring 7 and the silicon rubber ring 8 are tightly sealed, and the thread surface is coated with epoxy glue to further enhance the sealing performance.
  • the end flange 2 is simultaneously welded with the umbrella skirt structure 1.
  • the umbrella skirt structure 1 can block the condensed water from the room temperature end, the other end of the insulating sleeve 4 is connected to the vacuum flange 5 through a thread, the sealing surface is tightly sealed by a silicone rubber ring 9, and the thread surface is coated with epoxy glue to further enhance the sealing performance.
  • Vacuum method Blue 5 is sealed with vacuum Dewar.
  • the insulation sleeve 4 is located between the end face flange 2 and the vacuum flange 5.
  • a flange insulation layer 3 is solidified.
  • the flange insulation layer 3 is wrapped with epoxy-impregnated glass ribbon. It is pressed in a vacuum environment so that all the air bubbles generated in the wrapping are released and then it is heated to solidify, and the end face flange 2 is welded to the current lead main body sleeve 6.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Containers, Films, And Cooling For Superconductive Devices (AREA)

Abstract

本发明公开了一种用于大电流高温超导电流引线的室温端绝缘法兰，包括有绝缘套筒，绝缘套筒两端分别与端面法兰和真空法兰密封连接，绝缘套筒与端面法兰、真空法兰之间的密封面分别通过硅橡胶圈顶紧密封；绝缘套筒外位于端面法兰、真空法兰之间固化有一圈法兰绝缘层；所述端面法兰上焊接有伞裙结构，电流引线竖直状态运行时，伞裙结构可有效阻挡来自室温端的冷凝水落入高低电压法兰之间的绝缘外表面，端面法兰焊接于电流引线主体套管上。本发明集成高压绝缘、机械支撑、真空密封于一体，满足低温、真空环境下电传输的特殊要求。

Description

一种用于大电流高温超导电流引线的室温端绝缘法兰 技术领域
本发明涉及大型热核聚变装置或其它大型电磁装置的超导磁体的供电馈线领域，具体为一种用于大电流高温超导电流引线的室温端绝缘法兰。
背景技术
热核聚变将为人类提供取之不尽的清洁能源，国际热核聚变试验堆(ITER)计划将在未来十年内建成。高温超导电流引线为其巨型低温超导磁体供电，同时是磁体主要的热负荷来源。由于超导磁体以及电流引线本身工作在低温、真空环境中；而且大型电流引线重达百公斤量级，电流引线与真空杜瓦的连接法兰必须能够承载本身重量；电流引线为超导磁体传输电流，而真空杜瓦处于接地状态，在故障态下电流引线必须能够承载上万伏的绝缘，因此能够集成高压绝缘、强载荷、能在真空低温下工作的绝缘法兰是保证电流引线正常安全运行的关键。
发明内容
本发明的目的是提供一种用于大电流高温超导电流引线的室温端绝缘法兰，实现电流引线跨界真空与大气环境连接、高压与接地电位、连接常温与低温，同时能够承载电流引线本身重量载荷。
为了达到上述目的，本发明所采用的技术方案为：
一种用于大电流高温超导电流引线的室温端绝缘法兰包括有伞裙结构、端面法兰、法兰绝缘层、绝缘套筒、真空法兰、电流引线主体套管、硅橡胶圈；所述绝缘套筒两端分别与端面法兰和真空法兰密封连接，绝缘套筒与端面法兰、真空法兰之间的密封面分别通过硅橡胶圈顶紧密封，在保证真空密 封性能的前提下简化了安装过程；所述绝缘套筒外位于端面法兰、真空法兰之间固化有一圈法兰绝缘层；所述端面法兰上焊接有伞裙结构，电流引线竖直状态运行时，伞裙结构可有效阻挡来自室温端的冷凝水落入高低电压法兰之间的绝缘外表面，端面法兰焊接于电流引线主体套管上，真空法兰与真空杜瓦密封连接。
进一步的，所述绝缘套筒外表面车有螺纹，且螺纹面涂抹环氧胶，所述端面法兰、真空法兰分别通过螺纹与绝缘套筒两端连接。
进一步的，所述法兰绝缘层用环氧浸渍的玻璃丝带包绕并在真空环境下对其进行压制使得包绕中产生的气泡全部释放再对其进行加热使其固化。
本发明通过足够强度的绝缘套筒连接高压与接地电位，满足机械强度与绝缘耐压强度；通过螺纹和硅橡胶圈密封结构实现电流引线的大气与杜瓦真空的分隔；通过真空法兰实现与绝缘法兰的机械连接以及与真空杜瓦法兰的真空密封连接。
本发明工作在真空、低温、高压绝缘环境下，适用于低温电物理装置，为电流引线与低温杜瓦之间建立真空、绝缘的连接与支撑。本发明在聚变堆领域以及超导领域具有较好的应用价值。
事实上，只要是期望在真空、低温下传输电压电流的场合，具有真空、绝缘高压、承担机械载荷要求的部件都可以参考本发明的技术方案，但凡是未脱离本发明的技术方案的内容，仅是依据本发明的技术实质对所述结构进行的简单修改，或是同等变化与修饰，均应属于本发明技术方案的范围之内。
本发明的优点是：
本发明的结构简单，但功能复杂，保证了低温环境下运行、真空、高压 绝缘以及机械支撑的多重功用；各功能由不同的部件承担；绝缘套筒承受机械载荷与高电位，但工作在大气与室温下，真空法兰与杜瓦法兰连接起真空密封作用；整体设计安全可靠。
本发明的主体采用螺纹结构连接，取代了传统用销钉紧固的方式，且密封面采用密封胶和硅橡胶圈密封；绝缘采用真空加压的方式固化，增强了绝缘性能。
实验结果表明，本发明的绝缘法兰结构牢靠，真空密封性好，绝缘耐压大于10kV。
附图说明
图1为本发明结构示意图。
具体实施方式
如图1所示。一种用于大电流高温超导电流引线的室温端绝缘法兰，包括有外表面车有螺纹的绝缘套筒4，绝缘套筒4一端通过螺纹连接高电位的端面法兰2，其密封面通过硅橡胶圈7和硅橡胶圈8顶紧密封，且螺纹面涂有环氧胶进一步增强密封性能，端面法兰2同时焊接有伞裙结构1，电流引线竖直状态运行时，伞裙结构1可阻挡来自室温端的冷凝水，绝缘套筒4另一端通过螺纹连接真空法兰5，其密封面通过硅橡胶圈9顶紧密封，且螺纹面涂有环氧胶进一步增强密封性能，真空法兰5与真空杜瓦密封连接，绝缘套筒4外位于端面法兰2、真空法兰5之间固化有一圈法兰绝缘层3；法兰绝缘层3用环氧浸渍的玻璃丝带包绕并在真空环境下对其进行压制使得包绕中产生的气泡全部释放再对其进行加热使其固化，端面法兰2焊接于电流引线主体套管6上。

Claims (3)

  1. 一种用于大电流高温超导电流引线的室温端绝缘法兰，其特征在于：包括有伞裙结构(1)、端面法兰(2)、法兰绝缘层(3)、绝缘套筒(4)、真空法兰(5)、电流引线主体套管(6)、硅橡胶圈(7)、硅橡胶圈(8)和硅橡胶圈(9)；所述绝缘套筒(4)两端分别与端面法兰(2)和真空法兰(5)密封连接，绝缘套筒(4)与端面法兰(2)之间的密封面通过硅橡胶圈(7)、硅橡胶圈(8)顶紧密封，绝缘套筒(4)与真空法兰(5)两端之间的密封面通过硅橡胶圈(9)顶紧密封；所述绝缘套筒(4)外位于端面法兰(2)、真空法兰(5)之间固化有一圈法兰绝缘层(3)；所述端面法兰(2)上焊接有伞裙结构(1)，端面法兰(2)焊接于电流引线主体套管(6)上，真空法兰(5)与真空杜瓦密封连接。
  2. 根据权利要求1所述的一种用于大电流高温超导电流引线的室温端绝缘法兰，其特征在于：所述绝缘套筒(4)外表面车有螺纹，且螺纹面涂抹环氧胶，所述端面法兰(2)、真空法兰(5)分别通过螺纹与绝缘套筒(4)两端连接。
  3. 根据权利要求1所述的一种用于大电流高温超导电流引线的室温端绝缘法兰，其特征在于：所述法兰绝缘层(3)用环氧浸渍的玻璃丝带包绕并在真空环境下对其进行压制使得包绕中产生的气泡全部释放再对其进行加热使其固化。
PCT/CN2019/105981 2018-09-26 2019-09-16 一种用于大电流高温超导电流引线的室温端绝缘法兰 WO2020063384A1 (zh)

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CN109273192B (zh) * 2018-09-26 2022-08-26 中国科学院合肥物质科学研究院 一种用于大电流高温超导电流引线的室温端绝缘法兰
CN114334344A (zh) * 2021-12-08 2022-04-12 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） 一种超导磁体电流接线柱组件及装配方法

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