WO2018040508A1 - 直流输电换流阀冷却水路及其电极和金属电极体 - Google Patents

直流输电换流阀冷却水路及其电极和金属电极体 Download PDF

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WO2018040508A1
WO2018040508A1 PCT/CN2017/073404 CN2017073404W WO2018040508A1 WO 2018040508 A1 WO2018040508 A1 WO 2018040508A1 CN 2017073404 W CN2017073404 W CN 2017073404W WO 2018040508 A1 WO2018040508 A1 WO 2018040508A1
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Prior art keywords
electrode
spiral envelope
mounting
spiral
straight column
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PCT/CN2017/073404
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English (en)
French (fr)
Inventor
张建
范彩云
刘堃
李凯
邱文龙
王超
王晓民
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国家电网公司
国网山西省电力公司
许继集团有限公司
许继电气股份有限公司
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Publication of WO2018040508A1 publication Critical patent/WO2018040508A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/12—Mountings, e.g. non-detachable insulating substrates
    • H01L23/13—Mountings, e.g. non-detachable insulating substrates characterised by the shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
    • H01L23/473—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/06—Circuits specially adapted for rendering non-conductive gas discharge tubes or equivalent semiconductor devices, e.g. thyratrons, thyristors

Definitions

  • Embodiments of the present invention relate to the field of power system device devices, and in particular, to a DC power transmission converter cooling water circuit, an electrode thereof, and a metal electrode body.
  • High-voltage DC converter valve thyristor / IGBT, damping resistor, voltage equalizing resistor and other power devices use deionized water as the circulating cooling medium.
  • the conductivity of the deionized water for converter valve cooling is usually from 0.1 ⁇ S/cm to 0.5 ⁇ S/cm. Since the cooling water circuit flows through the metal parts with different potentials at different positions of the converter valve, the water flow in the high-voltage and complex electromagnetic field environment between the metal parts with different potentials will cause leakage current. Therefore, these metal parts may be subject to electrolytic corrosion. .
  • electrodes are installed at corresponding positions of the waterway.
  • the valve tower further comprising a valve block module for cooling the valve layer assembly
  • the water cooling system of the reactor module includes a cooling water main pipe disposed around the corresponding valve layer assembly from top to bottom, and the cooling water main pipe includes an inlet main pipe and a main water outlet pipe, and is provided on the main pipe of the inlet and outlet water for An electrode that fixes the potential in the main conduit of the cooling water, the electrode including a platinum pin that extends into the corresponding conduit.
  • the inlet and outlet pipes at the same position have the same potential through the electrodes, ensuring that there is no leakage current between them.
  • the electrolysis current is transferred from the metal member to the inert metal electrode, thereby avoiding electrical corrosion of the metal member.
  • the surface of the electrode body is easily fouled, and the deposit generated by the scale adversely affects the potential control effect of the electrode, and the life of the electrode is shortened.
  • Embodiments of the present invention provide a DC power transmission converter cooling water circuit, an electrode thereof, and a metal electrode body, and it is desirable to solve the problem that the electrode is easily scaled.
  • the technical solution of the metal electrode body of the electrode provided by the embodiment of the invention is: a metal electrode body for an electrode, comprising a central straight column portion for mounting on the electrode base, and a spiral envelope portion outside the central straight column portion, the spiral package
  • the network portion has a beginning portion at the top and a tail portion at the bottom, and the beginning portion of the spiral envelope portion is connected to the top end of the center straight column portion.
  • an equidistant gap is left between the tail section of the spiral envelope portion and the center straight column portion.
  • the spiral envelope portion is coaxially arranged with the central straight column portion, and the central straight portion and the spiral envelope portion are integrated; the spiral envelope portion is generally cylindrical or Round or conical.
  • the center straight portion has a mounting plug section extending below the tail section of the spiral envelope portion for mounting on the electrode base.
  • the technical solution of using the electrode of the above metal electrode body is: an electrode comprising an electrode base, wherein the electrode base is fixed with a metal electrode body, and the metal electrode body is fixed on the electrode base.
  • the central straight column portion has a spiral envelope portion outside the center straight column portion, and the spiral envelope portion has a beginning portion at the top portion and a tail portion at the bottom portion, and the beginning portion of the spiral envelope portion is connected to the top end of the center straight column portion.
  • an equidistant gap is left between the tail section of the spiral envelope portion and the center straight column portion.
  • the electrode base Based on the electrode of the metal electrode body, the electrode base has a top mounting surface, the metal electrode body is fixedly mounted on the top mounting surface, a tail section of the spiral envelope portion and a top mounting surface of the electrode base Arranged in parallel.
  • the spiral envelope portion is disposed coaxially with the central straight column portion based on the electrode of the metal electrode body, and the central straight portion and the spiral envelope portion are integrated; the spiral envelope portion is generally cylindrical or round Table or conical.
  • the center straight column portion has a mounting plug section extending below the tail section of the spiral envelope portion, and the mounting plug section is fixedly assembled by one of the following modes On the electrode base:
  • a mounting hole for inserting the mounting plug-in section is disposed on the electrode base, and a pressing screw for pressing the mounting plug-in section into the mounting hole is disposed on the hole wall of the mounting hole;
  • the electrode base is provided with a mounting hole for inserting the mounting plugging portion, and the mounting hole is provided with a crimping fixing structure to press-fit the mounting plugging portion into the mounting hole.
  • a DC transmission converter valve cooling waterway comprising a water-cooled pipeline and a corresponding electrode sealed on the water-cooled pipeline
  • the electrode comprising an electrode base
  • a metal electrode body is fixed on the electrode base
  • the metal electrode body includes a central straight column portion fixed on the electrode base
  • the central straight column portion is provided with a spiral envelope portion
  • the spiral envelope portion has a top portion The beginning of the segment and the tail segment at the bottom, the beginning of the spiral envelope portion is connected to the top end of the central straight column portion.
  • the metal electrode body of the electrode provided by the embodiment of the invention comprises a central straight column portion and a spiral envelope portion disposed outside the center straight column portion, and the beginning portion of the top portion of the spiral envelope portion is connected to the top end of the central straight column portion.
  • FIG. 1 is a schematic structural diagram of a first electrode according to an embodiment of the present invention.
  • Figure 2 is a perspective view of the electrode shown in Figure 1;
  • FIG. 3 is a schematic structural view of a metal electrode body of the electrode shown in FIG. 1;
  • FIG. 4 is a schematic structural diagram of a second electrode according to an embodiment of the present invention.
  • Figure 5 is a perspective view of the electrode shown in Figure 4.
  • embodiments of the present invention provide an electrode that can improve the electric field distribution on the surface of the electrode.
  • a spiral envelope portion is disposed at a periphery of a central straight portion of the electrode (corresponding to the electrode needle), and the spiral envelope portion is connected to one end of the center straight column portion, and the The central straight column portion forms an electric field to improve the electric field distribution characteristics, thereby reducing the fouling phenomenon caused by the electric field distribution, thereby reducing the adverse effect of the deposit on the potential control caused by the scaling, and prolonging the service life of the electrode.
  • the embodiment provides an electrode including an electrode base 1 which is a metal base connected with a wire 6 by a screw.
  • the electrode base 1 is provided with a mounting hole, and the opening of the mounting hole is located.
  • the metal mounting body 3 is inserted and mounted in the mounting hole on the top mounting surface of the electrode base.
  • the metal electrode body 3 includes a central straight portion 31, and the central straight portion 31 has a spiral envelope portion 32 and a spiral envelope portion. The whole is cylindrical, where the spiral envelope portion 32 is disposed coaxially with the central straight portion 31, and the central straight portion 31 and the spiral envelope portion 32 are of unitary structure.
  • the spiral envelope portion 32 may be fitted around the periphery of the center straight column portion 31.
  • the spiral envelope portion 32 has a beginning section 321 at the top and a tail section 322 at the bottom, and the beginning section 321 of the spiral envelope portion 32 is connected to the top end of the center straight pillar portion 31.
  • the spiral envelope portion 32 can be divided into two segments, one segment being the beginning segment 321 and the other segment being the tail segment 322.
  • the beginning section 321 is a section connected to the center straight column portion 31; the tail section 322 is a section separated from the center straight column portion 31.
  • the top portion is a portion of the spiral envelope portion 32 and the center straight column portion 31, and the portion of the spiral envelope portion 32 away from the electrode base after the center straight column is mounted on the electrode base .
  • the bottom is the opposite portion of the top.
  • the tail section 322 of the spiral envelope portion is arranged in parallel with the top mounting surface of the electrode base 1, and a gap is left between the tail section 322 and the central straight column portion 31, for example, an equidistant gap to avoid formation of circuit circulation or dielectric shock. Wear discharge.
  • the spiral envelope portion can be made into a spiral body which is surrounded by the same cylindrical surface. On the one hand, it has the characteristics of simple fabrication, on the other hand, it can be formed more uniformly around the center straight column portion 31.
  • the electric field ensures a uniform and effective reduction in the formation and spread of deposits on the metal electrodes.
  • the center straight portion 31 has a mounting plug portion 310 extending below the tail portion 322 of the spiral envelope portion 32, and the mounting hole is provided on the hole wall of the mounting hole of the electrode base 1
  • the connecting piece is pressed against the pressing screw 4 in the mounting hole, and the metal electrode body is fixedly mounted on the electrode base 1 by the pressing screw 4.
  • a plastic sleeve 2 is provided on the electrode base 1, and the plastic sleeve 2 is placed outside the metal electrode body, and the plastic sleeve 2 is located below the spiral envelope portion, and the sealing ring 5 is embedded in the plastic sleeve 2.
  • the plastic sleeve 2 and the sealing ring 5 collectively constitute a water passage sealing structure of the electrode.
  • the spiral envelope portion has a cylindrical shape as a whole, and in other embodiments, it may also have a truncated cone shape or a conical shape.
  • the spiral envelope portion may be an equidistant structure or a non-equidistant structure.
  • the tail section of the spiral envelope portion is parallel to the top mounting surface of the electrode base. In other embodiments, the tail section may also be disposed obliquely to the top mounting surface.
  • the electrode shown in FIG. 4 and FIG. 5 has the same structure as the electrode shown in FIG. 2 and FIG. 3, and the structure of the metal electrode body is the same, and the details are mainly in the metal electrode body 12 and the electrode.
  • a mounting hole for inserting the mounting plug of the metal electrode body 12 is provided on the electrode base 11, and a crimping fixing structure is provided at the mounting hole to press the mounting plugging portion.
  • the locking and fixing structure can be a crimping ring sleeve structure, and the crimping ring sleeve is crimped and locked by the deformed crimping ring sleeve when the mounting plugging section is inserted into the mounting hole. Connected.
  • the corresponding sealing ring 10 is directly fitted into the sealing ring mounting groove provided on the electrode base 11.
  • the sealing ring here is the water passage sealing structure of the electrode.
  • the electrode base 11 is designed as a regular hexagonal structure, and a specific tightening torque can be applied to the electrodes by a special tool.
  • a wire 13 is fixedly attached to the electrode base 11 by screws, and the wire 13 is externally connected to a uniform potential.
  • the embodiment of the present invention further provides a metal electrode body for an electrode.
  • the structure of the metal electrode body in the embodiment is the same as that of the metal electrode body in the electrode shown in FIG. 2 and FIG. 3, and details are not described herein again.
  • the embodiment of the present invention further provides a DC transmission converter valve cooling waterway.
  • the structure of the cooling waterway in this embodiment is the same as that of the prior art cooling waterway, and the difference mainly lies in that FIG. 2 and FIG. 3 can be used.
  • the electrodes shown and the electrode structures in the electrodes shown in Figures 4 and 5 are not described too much herein.
  • the structure of the cooling water passage in the present embodiment can be the cooling water passage structure in the converter valve module of the Chinese Patent Application No. CN105336716A.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
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Abstract

一种直流输电换流阀冷却水路及其电极和金属电极体（3），电极用金属电极体包括用于安装在电极底座（1）上的中心直柱部分（31），中心直柱部分外有螺旋包络部分（32），螺旋包络部分具有位于顶部的始段（321）和位于底部的尾段（322），螺旋包络部分的始段与中心直柱部分的顶端连接。

Description

直流输电换流阀冷却水路及其电极和金属电极体 技术领域
本发明实施例涉及电力系统设备器件领域，特别涉及一种直流输电换流阀冷却水路及其电极和金属电极体。
背景技术
高压直流换流阀晶闸管/IGBT、阻尼电阻、均压电阻等功率器件均采用去离子水作为循环冷却介质。换流阀冷却用去离子水电导率通常为0.1μS/cm-0.5μS/cm。由于冷却水路要流过换流阀不同位置的、有着不同电位的金属件，不同电位的金属件之间高压、复杂电磁场环境的水路就会产生漏电流，因此，这些金属件将可能受到电解腐蚀。为了解决这一问题，在水路的相应位置安装电极。如申请公布号为CN105336716A的中国发明专利申请中所公开的换流阀阀组模块的换流阀阀塔，包括多个阀层组件，阀塔还包括用于冷却阀层组件的阀组模块及电抗器模块的水冷系统，水冷系统包括由上至下环绕设置于相应阀层组件外侧的冷却水主管道，冷却水主管道包括进水主管道和出水主管道，在进出水主管道上设有用于固定冷却水主管道中电位的电极，电极包括延伸入相应管道中的铂金插针。通过电极使在同一位置的进出水管具有相同的电位，保证它们之间没有漏电流。并使电解电流从金属构件转移到惰性金属电极上，避免了金属构件的电腐蚀。
但在电极的使用中发现：电极体表面很容易结垢，结垢产生的沉积物会对电极的电位控制效果造成负面影响，且会导致电极的使用寿命缩短。
发明内容
本发明实施例提供一种直流输电换流阀冷却水路及其电极和金属电极体，期望解决电极容易结垢的问题。
本发明实施例所提供的电极的金属电极体的技术方案是：电极用金属电极体，包括用于安装在电极底座上的中心直柱部分，中心直柱部分外有螺旋包络部分，螺旋包络部分具有位于顶部的始段和位于底部的尾段，螺旋包络部分的始段与中心直柱部分的顶端连接。
基于上述电极的金属电极体，所述螺旋包络部分的尾段与所述中心直柱部分之间留有间隙。
基于上述电极的金属电极体，所述螺旋包络部分的尾段与所述中心直柱部分之间留有等距间隙。
基于上述电极的金属电极体，所述螺旋包络部分与所述中心直柱部分同轴布置，且中心直柱部分和螺旋包络部分为一体结构；所述螺旋包络部分整体呈圆柱形或圆台形或圆锥形。
基于上述电极的金属电极体，所述中心直柱部分具有延伸至所述螺旋包络部分的尾段下方的用于安装在电极底座上的安装插接段。
本发明实施例所提供的使用上述金属电极体的电极的技术方案是：电极，包括电极底座，电极底座上固设有金属电极体，所述金属电极体包括固设在所述电极底座上的中心直柱部分，中心直柱部分外有螺旋包络部分，螺旋包络部分具有位于顶部的始段和位于底部的尾段，螺旋包络部分的始段与中心直柱部分的顶端连接。
基于上述金属电极体的电极，所述螺旋包络部分的尾段与所述中心直柱部分之间留有间隙。
基于上述金属电极体的电极，所述螺旋包络部分的尾段与所述中心直柱部分之间留有等距间隙。
基于上述金属电极体的电极，所述电极底座具有顶部安装面，所述金属电极体固定安装在所述顶部安装面上，所述螺旋包络部分的尾段与所述电极底座的顶部安装面平行布置。
基于上述金属电极体的电极，所述螺旋包络部分与所述中心直柱部分同轴布置，中心直柱部分和螺旋包络部分为一体结构；所述螺旋包络部分整体呈圆柱形或圆台形或圆锥形。
基于上述金属电极体的电极，所述中心直柱部分具有延伸至所述螺旋包络部分的尾段下方的安装插接段，所述安装插接段通过下述其中一种方式对应的固定装配在所述电极底座上：
(1)电极底座上设有供所述安装插接段插入的安装孔，在安装孔的孔壁上设有将所述安装插接段压紧在安装孔中的压紧螺钉；
(2)电极底座上设有供所述安装插接段插入的安装孔，安装孔处设有压接固定结构以将安装插接段压装锁止在所述安装孔中。
本发明实施例所提供的使用上述电极的直流输电换流阀冷却水路的技术方案是：直流输电换流阀冷却水路，包括水冷管道和对应的密封装配在水冷管道上的电极，电极包括电极底座，电极底座上固设有金属电极体，所述金属电极体包括固设在所述电极底座上的中心直柱部分，中心直柱部分外套装有螺旋包络部分，螺旋包络部分具有位于顶部的始段和位于底部的尾段，螺旋包络部分的始段与中心直柱部分的顶端连接。
本发明实施例所提供的电极的金属电极体，包括中心直柱部分和套装布置在中心直柱部分外侧的螺旋包络部分，且螺旋包络部分顶部的始段与中心直柱部分的顶端连接，这样，通过螺旋包络部分有效改善电场分布特性，当将其应用在冷却水路上时，可有效减少金属电极上沉积物的形成和蔓延。
附图说明
图1为本发明实施例提供的第一种电极的结构示意图；
图2为图1所示电极的立体示意图；
图3为图1所示电极的金属电极体的结构示意图；
图4为本发明实施例提供第二种电极的结构示意图；
图5为图4所示电极的立体示意图。
具体实施方式
研究发现：导致电极容易结垢的原因在于电极表面的电场分布恶劣。为了减少电极表面的结垢现象，本发明实施例提出一种可以改善电极表面的电场分布的电极。在本发明实施例中，在电极的中心直柱部分(相当于所述电极针)的外围，设置螺旋包络部分，该螺旋包络部分与所述中心直柱部分的一端连接，与所述中心直柱部分共同形成电场，以改善电场分布特性，从而减少因电场分布导致的结垢现象，从而减少因结垢导致的沉积物对电位控制的不良影响，延长电极的使用寿命。下面结合附图及具体实施例对本发明作进一步详细的说明。下面结合附图对本发明的实施方式作进一步说明，应当理解，以下所说明的优选实施例仅用于说明和解释本发明，并不用于限定本发明。
如图1至图3所示，本实施例提供一种电极，该电极包括电极底座1，其为通过螺钉连接有导线6的金属底座，电极底座1上设有安装孔，安装孔的开口位于电极底座的顶部安装面上，在安装孔中插接装配有金属电极体3，该金属电极体3包括中心直柱部分31，中心直柱部分31外有螺旋包络部分32，螺旋包络部分整体呈圆柱形，此处的螺旋包络部分32与中心直柱部分31同轴布置，且中心直柱部分31和螺旋包络部分32为一体结构。 在本实施例中所述螺旋包络部分32可套装在所述中心直柱部分31的外围。
螺旋包络部分32具有位于顶部的始段321和位于底部的尾段322，螺旋包络部分32的始段321与中心直柱部分31的顶端连接。总之，所述螺旋包络部分32可分为两段，一段为所述始段321，另一段为所述尾段322。所述始段321为与所述中心直柱部分31连接的一段；所述尾段322为与与所述中心直柱部分31分离的一段。
所述顶部为螺旋包络部分32与所述中心直柱部分31的部位，当所述中心直柱安装到所述电极底座之上之后，所述螺旋包络部分32远离所述电极底座的部分。所述底部为所述顶部的相对部分。螺旋包络部分的尾段322与电极底座1的顶部安装面平行布置，而且，尾段322与中心直柱部分31之间留有间隙，例如，等距间隙，避免形成电路环流或造成电介质击穿放电。采用等距间隙，可以通过将螺旋包络部分制作成沿同一个圆柱表面环绕的螺旋体即可，一方面具有制作简单的特点，另一方面，可以在所述中心直柱部分31外围形成更加均匀的电场，从而确保均匀有效的减少金属电极上沉积物的形成和蔓延。
本实施例中，中心直柱部分31具有延伸至所述螺旋包络部分32的尾段322下方的安装插接段310，在电极底座1的安装孔的孔壁上设有将所述安装插接段压紧在安装孔中的压紧螺钉4，利用该压紧螺钉4将金属电极体固定安装在电极底座1上。
另外，在电极底座1上设有塑料套2，该塑料套2套装在金属电极体外侧，塑料套2位于螺旋包络部分的下方，在塑料套2上嵌装密封圈5。当将本实施例所提供的电极压紧安装在冷却水路上时，塑料套2、密封圈5共同构成电极的水路密封结构。
本实施例中，螺旋包络部分整体呈圆柱形，在其他实施例中，也可呈圆台形或圆锥形。螺旋包络部分可为等距结构，也可以为非等距结构。
本实施例中，螺旋包络部分的尾段与电极底座的顶部安装面平行，在其他实施例中，尾段也可以与顶部安装面倾斜布置。
如图4、图5所示的电极与图2和图3所示的电极相比，金属电极体的结构相同，在此不再过多赘述，其区别之处主要在于金属电极体12与电极底座11的固定装配方式，本实施例中，在电极底座11上设有供金属电极体12的安装插接段插入的安装孔，安装孔处设有压接固定结构以将安装插接段压装锁止在所述安装孔中，此处的压接固定结构可为压接环套结构，在将安装插接段插入安装孔中时，由变形的压接环套压接锁止安装插接段。
另外，将相应的密封圈10直接嵌装在电极底座11上设有的密封圈安装槽中。当将电极整体插入冷却水路中压紧后，此处的密封圈即为电极的水路密封结构。
而且，电极底座11设计为正六方形结构，可以利用专用工具对电极施加特定紧固力矩。
在电极底座11上通过螺钉固定连接有导线13，该导线13对外连接以统一电位。
本发明实施例还提供一种电极用金属电极体，该实施例中的金属电极体的结构与图2和图3所示电极中的金属电极体的结构相同，在此不再赘述。
本发明实施例还提供一种直流输电换流阀冷却水路，该实施例中的冷却水路的结构与现有技术中的冷却水路的结构相同，其区别之处主要在于可采用图2和图3所示的电极和图4和图5所示电极中的电极结构，在此不再过多赘述。
本实施例中的冷却水路的结构可采用申请公布号为CN105336716A的中国发明专利申请中的换流阀模块中的冷却水路结构。
以上实施例仅用以说明本发明的技术方案而非对其限制，凡按照本发明原理所作的修改，都应当理解为落入本发明的保护范围。
。

Claims (12)

  1. 一种电极用金属电极体，包括用于安装在电极底座上的中心直柱部分，中心直柱部分外有螺旋包络部分，螺旋包络部分具有位于顶部的始段和位于底部的尾段，螺旋包络部分的始段与中心直柱部分的顶端连接。
  2. 根据权利要求1所述的电极用金属电极体，其中：所述螺旋包络部分的尾段与所述中心直柱部分之间留有间隙。
  3. 根据权利要求2所述的电极用金属电极体，其中：所述螺旋包络部分的尾段与所述中心直柱部分之间留有等距间隙。
  4. 根据权利要求1所述的电极用金属电极体，其中：所述螺旋包络部分与所述中心直柱部分同轴布置，且中心直柱部分和螺旋包络部分为一体结构；所述螺旋包络部分整体呈圆柱形或圆台形或圆锥形。
  5. 根据权利要求1、2、3或4所述的电极用金属电极体，其中：所述中心直柱部分具有延伸至所述螺旋包络部分的尾段下方的用于安装在电极底座上的安装插接段。
  6. 一种电极，包括电极底座，电极底座上固设有金属电极体，所述金属电极体包括固设在所述电极底座上的中心直柱部分，中心直柱部分外有螺旋包络部分，螺旋包络部分具有位于顶部的始段和位于底部的尾段，螺旋包络部分的始段与中心直柱部分的顶端连接。
  7. 根据权利要求6所述的电极，其中：所述螺旋包络部分的尾段与所述中心直柱部分之间留有间隙。
  8. 根据权利要求7所述的电极，其中：所述螺旋包络部分的尾段与所述中心直柱部分之间留有等距间隙。
  9. 根据权利要求6、7或8所述的电极，其中：所述电极底座具有顶部安装面，所述金属电极体固定安装在所述顶部安装面上，所述螺旋包络部分的尾段与所述电极底座的顶部安装面平行布置。
  10. 根据权利要求6、7或8所述的电极，其中：所述螺旋包络部分与所述中心直柱部分同轴布置，中心直柱部分和螺旋包络部分为一体结构；所述螺旋包络部分整体呈圆柱形或圆台形或圆锥形。
  11. 根据权利要求6至8中任一项所述的电极，其中：所述中心直柱部分具有延伸至所述螺旋包络部分的尾段下方的安装插接段，所述安装插接段通过下述其中一种方式对应的固定装配在所述电极底座上：
    (1)电极底座上设有供所述安装插接段插入的安装孔，在安装孔的孔壁上设有将所述安装插接段压紧在安装孔中的压紧螺钉；
    (2)电极底座上设有供所述安装插接段插入的安装孔，安装孔处设有压接固定结构以将安装插接段压装锁止在所述安装孔中。
  12. 一种直流输电换流阀冷却水路，包括水冷管道和对应的密封装配在水冷管道上的电极，所述电极采用权利要求6至11中任意一项所述的电极。
PCT/CN2017/073404 2016-08-31 2017-02-13 直流输电换流阀冷却水路及其电极和金属电极体 WO2018040508A1 (zh)

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