• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A casing for guiding a high-voltage line through a wall with a pressure compensation layer made of composite material with nonlinear electrical conductivity, comprising a rod-shaped guide rod, the outside of the guide rod being covered with a pressure compensation layer, the exterior of the pressure compensation layer being covered with a current limiting layer, the exterior of the Current limiting layer is covered with a sheath with a plurality of umbrella-shaped projections made of silicone rubber, and wherein an electrode extension layer is embedded in the current limiting layer. Advantages: By using the pressure equalization layer and the electrode extension layer made of non-linear conductive composite material, the field strength inside the main insulation and in the vicinity of the flange is made uniform, thereby not only solving the problem of the breakdown of the main insulation and the flashover on the flange, but also the size of the wall penetration liner is also reduced, thereby apparently improving the heat dissipation performance of the liner, the manufacturing process is greatly simplified, and the efficiency and economic benefit are improved.
    公开号:CH714353B1
    申请号:CH00700/19
    申请日:2017-01-17
    公开日:2021-07-15
    发明作者:He Jinliang；Hu Jun；Zhao Xiaolei；Yang Xiao；Meng Pengfei；Yu Zhanqing；Zeng Rong；Zhang Bo；Li Qi
    申请人:Univ Tsinghua；
    IPC主号:
    专利说明:

    Technical area
    The present invention relates to a casing for guiding a high voltage power line through a wall having a pressure equalization layer of composite material having nonlinear electrical conductivity, for the field of high voltage transmission and connection equipment.
    State of the art
    The casing is an important piece of equipment in the power system used to route a high voltage line through a wall, and its reliability has an important impact on the safe and reliable operation of the power system. The casing is formed by inserting a high voltage electrode guide rod in the center of the intermediate flange of the ground electrode and is a typical insulating structure, the electric field of which is a component of the vertical medium surface, the main insulation is prone to breakdown and flashover can easily occur at the edge of the flange . For this purpose it is necessary to improve the electric field in the vicinity of the flange and the guide rod, to improve the insulation strength of the medium and to develop and select suitable insulation structures and materials. The casing tubes have different shapes and are currently dominated by the structure of the capacitive voltage equalization. A capacitor core structure is used for the internal insulation of the capacitive casing to balance the electric field within the casing. However, the manufacture of the capacitor core places high demands on the technological level, and various quality problems often arise in the production process, which significantly affects the reliability of the capacitive casing; and the required higher technical level also severely limits the reduction in production costs and the improvement in production efficiency. Because of its large size and serious internal heat generation, the high voltage DC liner using a condenser core poses a great hidden risk to safe and reliable operation of the liner.
    Content of the invention
    The present invention aims to solve the above problems and to develop a casing for guiding a high voltage power line through a wall with a pressure equalization layer made of composite material having non-linear electrical conductivity. The specific solution is: a casing for guiding a high-voltage line through a wall with a pressure compensation layer made of composite material with nonlinear electrical conductivity, comprising a rod-shaped guide rod, the outside of the guide rod being covered with a pressure compensation layer, and the outside of the pressure compensation layer being covered with a current limiting layer and wherein the exterior of the current limiting layer is covered with a multiple umbrella-shaped protrusion cover made of silicone rubber having a plurality of umbrella-shaped protrusions, and wherein an electrode extension layer is embedded in the current limiting layer.
    The pressure compensation layer and the electrode extension layer each consist of a nonlinear conductive composite of inorganic filler powder particles and organic materials with high insulation strength, the breakdown field strength of the nonlinear conductive composite of the pressure compensation layer 5 is higher than the breakdown field strength of the nonlinearly conductive composite of the electrode extension layer.
    A lower flange is arranged at both ends of the guide rod, the lower flange and the silicone rubber umbrella jacket forming a closed space, and wherein the guide rod, the pressure compensation layer, the current limiting layer and the electrode extension layer are each located in the closed space, and wherein both ends of the guide rod pass through the lower flange and are each connected to a connection terminal 1.
    An upper flange is disposed in the intermediate portion of the silicone rubber umbrella shell, both ends of the upper flange being connected to the silicone rubber umbrella shell, and the inner surface of the flange comes into contact with the electrode extension layer, and the silicone rubber umbrella shell is tubular Structure is formed, and wherein the outer surface of the silicone rubber umbrella jacket is provided with an umbrella-shaped projection, and wherein the umbrella-shaped projection and the silicone rubber umbrella jacket represent a one-time, ie one-piece, injection-molded overall structure, and the umbrella-shaped projections in a number of more than 1 are provided, and wherein the plurality of umbrella-shaped projections are arranged along the axial direction of the silicone rubber umbrella shell in a linear matrix, that is, at regular intervals.
    The inorganic filler powder particles contain at least one of zinc oxide varistor ceramic powder, SiC powder, TiO2 powder, SrTiO3 powder, CCTO powder and SnO2 powder, while the organic materials with high insulation strength include epoxy resin, polyethylene resin, polypropylene - Resin and EPDM resin included.
    The breakdown field strength of the nonlinearly conductive composite is selected by the voltage in the casing, the breakdown field strength of the nonlinearly conductive composite being selected by the geometric size of the nonlinearly conductive composite, and the breakdown field strength of the nonlinearly conductive composite being selected by the particle size of the inorganic filler powder particles, and wherein the breakdown strength of the nonlinearly conductive composite is adjusted by the volume part of the inorganic filler powder particles, and wherein for the breakdown strength of the nonlinearly conductive composite by introducing conductive powder particles in trace amounts, adjustment is made by mixing with a plurality of components .
    The inorganic filler powder particles have a particle size in the range from 30 microns to 300 microns, the respective components in the inorganic filler powder particles having a volume fraction as follows: 5-80 parts of zinc oxide varistor ceramic powders or 10-95 parts of SiC , TiO2, SrTiO3, CCTO and SnO2 powders.
    The casing obtained with the above technical solution of the present invention for guiding a high-voltage line through a wall with a pressure compensation layer made of composite material with nonlinear electrical conductivity has the following advantages: using the pressure compensation layer and the electrode extension layer made of non-linear conductive composite material, the field strength in The inside of the main insulation and near the flange are made uniform, thereby not only solving the problem of the breakdown of the main insulation and the flashover on the flange, but also the size of the casing is reduced, thereby the heat dissipation performance of the casing is obviously improved, the manufacturing process becomes easier greatly simplified, and the efficiency and economic benefit are improved.
    Brief description of the drawing
    Figure 1 shows a schematic structural view of the casing for guiding a high-voltage line through a wall with a pressure compensation layer made of composite material with non-linear electrical conductivity according to the present invention.
    List of reference symbols
    1 connection terminal 2 lower flange 3 silicone rubber umbrella jacket 4 guide rod 5 pressure compensation layer 6 current limiting layer 7 electrode extension layer 8 upper flange
    Detailed embodiments
    In connection with figures, the present invention is explained in more detail below.
    Figure 1 shows a schematic structural view of the casing for guiding a high-voltage line through a wall with a pressure compensation layer made of composite material with non-linear electrical conductivity according to the present invention. As shown in Figure 1, a casing for guiding a high-voltage line through a wall with a pressure compensation layer made of composite material with nonlinear electrical conductivity comprises a rod-shaped guide rod 4, the outside of the guide rod 4 being covered with a pressure compensation layer 5, and the outside of the pressure compensation layer 5 is covered with a current limiting layer 6, and wherein the exterior of the current limiting layer 6 is covered with a silicone rubber umbrella jacket 3, and wherein an electrode extension layer 7 is embedded in the current limiting layer 6.
    The pressure equalization layer 5 and the electrode extension layer 7 each consist of a nonlinearly conductive composite of inorganic filler powder particles and organic materials with high insulation strength, the breakdown field strength of the nonlinearly conductive composite of the pressure equalization layer 5 being higher than the breakdown field strength of the nonlinearly conductive composite 7 of the electrode extension layer is.
    At both ends of the guide rod 4, a lower flange 2 is arranged, wherein the lower flange 2 and the silicone rubber umbrella jacket 3 form a closed space, and wherein the guide rod 4, the pressure compensation layer 5, the current limiting layer 6 and the electrode extension layer 7 each other each located in the closed space, and wherein both ends of the guide rod 4 pass through the lower flange 2 and are each connected to a connecting terminal.
    In the intermediate portion of the silicone rubber umbrella jacket 3, an upper flange 8 is disposed, both ends of the upper flange 8 being connected to the silicone rubber umbrella jacket 3, and the inner surface of the flange 8 comes into contact with the electrode extension layer 7, and where the silicone rubber umbrella jacket 3 is formed as a tubular structure, and wherein the outer surface of the silicone rubber umbrella jacket 3 is provided with an umbrella-shaped projection, and wherein the umbrella-shaped projection and the silicone rubber umbrella jacket 3 constitute a one-time injection-molded overall structure, and the umbrella-shaped projections are provided in a number of more than 1, and wherein the plurality of umbrella-shaped projections are arranged along the axial direction of the silicone rubber umbrella shell 3 in a linear matrix, that is, at regular intervals.
    The inorganic filler powder particles contain single powder or a combination of two or more than two powders of zinc oxide varistor ceramic powder, SiC powder, TiO2 powder, SrTiO3 powder, CCTO powder and SnO2 powder, while the organic materials Contains epoxy resin, polyethylene resin, polypropylene resin and EPDM resin with high insulation strength.
    The breakdown field strength of the nonlinearly conductive composite is selected by the voltage in the casing, the breakdown field strength of the nonlinearly conductive composite being selected by the geometric size of the nonlinearly conductive composite, and the breakdown field strength of the nonlinearly conductive composite being selected by the particle size of the inorganic filler powder particles, and wherein the breakdown strength of the nonlinearly conductive composite is adjusted by the volume part of the inorganic filler powder particles, and wherein for the breakdown strength of the nonlinearly conductive composite by introducing conductive powder particles in trace amounts, adjustment is made by mixing with a plurality of components .
    The zinc oxide varistor ceramic powder in the inorganic filler powder particles have a particle size in the range of 30 microns to 300 microns, the respective components in the inorganic filler powder particles having a volume fraction as follows: 5-80 parts of zinc oxide varistor ceramic powders or 10-95 parts of any powder of SiC, TiO2, SrTiO3, CCTO and SnO2.
    Embodiment 1
    The inorganic filler powder particles contain zinc oxide varistor ceramic powder, while the organic materials with high insulation strength contain epoxy resin, polyethylene resin, polypropylene resin and EPDM resin.
    The breakdown field strength of the nonlinearly conductive composite is selected by the voltage in the casing, the breakdown field strength of the nonlinearly conductive composite is set by the volume part of the inorganic filler powder, and where for the breakdown field strength of the nonlinearly conductive composite by introducing soot in Trace amounts an adjustment is carried out by mixing with several components.
    The zinc oxide varistor ceramic powder in the inorganic filler powder particles have a particle size in the range from 30 microns to 50 microns, the respective components in the inorganic filler powder particles having a volume fraction of 40 parts of zinc oxide varistor ceramic powders.
    Embodiment 2
    The inorganic filler powder particles contain zinc oxide varistor ceramic powder and SiC powder, while the organic materials with high insulation strength contain epoxy resin, polyethylene resin, polypropylene resin and EPDM resin.
    The breakdown field strength of the nonlinearly conductive composite is selected by the geometric size of the nonlinearly conductive composite, the breakdown field strength of the nonlinearly conductive composite being set by the particle size of the inorganic filler powder particles, the breakdown field strength of the nonlinearly conductive composite being set by the volume part of the inorganic filler powder particles is adjusted, and the breakdown field strength of the nonlinearly conductive composite is adjusted by mixing with a plurality of components by introducing graphite in trace amounts.
    The zinc oxide varistor ceramic powder in the inorganic filler powder particles have a particle size in the range from 150 microns to 200 microns, the SiC powders have a particle size of 300-500 microns, and the respective components in the inorganic filler powder particles have a volume fraction of 20 parts of SiC powders and 40 parts of zinc oxide varistor ceramic powders.
    Embodiment 3
    The inorganic filler powder particles contain zinc oxide varistor ceramic powder and SiC powder, while the organic materials with high insulation strength contain epoxy resin, polyethylene resin, polypropylene resin and EPDM resin.
    The breakdown field strength of the nonlinear conductive composite is selected by the voltage in the casing, the breakdown field strength of the nonlinear conductive composite is selected by the geometric size of the nonlinear conductive composite, the breakdown field strength of the nonlinear conductive composite by the volume part of the inorganic filler powder particles is adjusted, and the breakdown field strength of the nonlinearly conductive composite is adjusted by mixing with a plurality of components by introducing carbon fibers in trace amounts.
    The zinc oxide varistor ceramic powder in the inorganic filler powder particles have a particle size in the range of 250 microns to 300 microns, the SiC powders have a particle size of 600-800 microns, and the respective components in the inorganic filler powder particles have a proportion by volume of 10 parts of zinc oxide varistor ceramic powders and 60 parts of SiC powders.
    For the casing, a three-layer main insulation, which consists mainly of a nonlinearly conductive composite, is used, the pressure compensation layer 5 consists of a nonlinearly conductive composite with a large breakdown field strength in order to limit the distribution of the field strength in the main insulation and to increase it evenly make; the electrode extension layer 7 on the upper flange 8 is used to implement the earth electrode extension and to reduce the field strength concentration on the flange 2; the performance parameters of the nonlinear conductive composite and the spatial field strength can be adjusted adaptively to realize an intelligent improvement in the spatial field strength; if the local field strength of the casing is too great, the electrical conductivity of the composite increases, whereby the partial stress increases and the local field strength is reduced, thereby reducing the likelihood of breakdown of the main insulation and of arcing along the surface.
    权利要求:
    Claims (5)
    [1]
    1. Lining pipe for guiding a high-voltage line through a wall, comprising a rod-shaped guide rod (4), the outside of the guide rod (4) being covered with a pressure compensation layer (5), the outside of the pressure compensation layer (5) covered with a current limiting layer (6) the outside of the current limiting layer (6) is covered with a sheath (3) with several umbrella-shaped projections made of silicone rubber, and an electrode extension layer (7) is embedded in the current limiting layer (6), the pressure equalization layer (5) and the electrode extension layer (7 ) each consist of a composite with non-linear electrical conductivity of inorganic filler powder particles and organic materials with high-voltage insulation strength, the breakdown field strength of the composite of the pressure compensation layer (5) being higher than the breakdown field strength of the composite of the electrode extension layer (7) t.
    [2]
    2. Lining pipe according to claim 1, characterized in that a lower flange (2) is arranged at both ends of the guide rod (4), the lower flange (2) and the casing (3) forming a closed space, the guide rod ( 4), the pressure compensation layer (5), the current limiting layer (6) and the electrode extension layer (7) are each located in the closed space, and both ends of the guide rod (4) pass through the lower flange (2) and each with a connecting terminal ( 1) are connected.
    [3]
    3. A casing according to claim 1, characterized in that an upper flange (8) is arranged in an intermediate portion of the casing (3), both ends of the upper flange (8) being connected to the casing (3), the inner surface of the upper Flange (8) comes into contact with the electrode extension layer (7), the casing (3) is designed as a tubular structure, the outer surface of the casing (3) is provided with several umbrella-shaped projections, the umbrella-shaped projections and the casing (3) are one-piece represent injection-molded overall structure, and the plurality of umbrella-shaped projections along the axial direction of the casing (3) are arranged at regular intervals.
    [4]
    4. Lining pipe according to claim 1, characterized in that the inorganic filler powder particles include at least one of zinc oxide varistor ceramic powder, SiC powder, TiO2 powder, SrTiO3 powder, CCTO powder, ie calcium-copper-titanium oxide powder, and SnO2 - Contain powder, while the organic materials with high voltage insulation strength contain epoxy resin, polyethylene resin, polypropylene resin and EPDM resin.
    [5]
    5. casing according to claim 4, characterized in that the inorganic filler powder particles have a particle size in the range from 30 microns to 300 microns, the respective components in the inorganic filler powder particles having a volume fraction as follows: 5-80 parts of zinc oxide varistor ceramic powders or 10-95 parts of SiC, TiO2, SrTiO3, CCTO, ie calcium-copper-titanium oxide, and SnO2 powders.
    类似技术:
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    SU888217A2|1979-06-06|1981-12-07|Предприятие П/Я А-7186|High-voltage device|
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    CN201340770Y|2008-11-28|2009-11-04|天水长城开关厂有限公司|Wall bushing|
    CN201397713Y|2009-01-20|2010-02-03|江苏大全封闭母线有限公司|Shielding insulation sleeve for tube busbar|
    CN201860065U|2010-11-22|2011-06-08|中国西电电气股份有限公司|Glue-impregnated capacitance type direct-current wall bushing|CN110729684B|2019-10-31|2020-10-27|西安交通大学|Ultra/extra-high voltage SF6Gas insulation wall bushing and insulation supporting structure thereof|
    法律状态:
    2020-08-14| PCAR| Change of the address of the representative|Free format text: NEW ADDRESS: BERGLIHOEH 3, 8725 ERNETSCHWIL (CH) |
    优先权:
    申请号 | 申请日 | 专利标题
    PCT/CN2017/071447|WO2018132951A1|2017-01-17|2017-01-17|Wall bushing using non-linear conductive composite material-based voltage equalization structure|
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