WO2021134865A1 - 高速线缆及其单元结构 - Google Patents

高速线缆及其单元结构 Download PDF

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Publication number
WO2021134865A1
WO2021134865A1 PCT/CN2020/075993 CN2020075993W WO2021134865A1 WO 2021134865 A1 WO2021134865 A1 WO 2021134865A1 CN 2020075993 W CN2020075993 W CN 2020075993W WO 2021134865 A1 WO2021134865 A1 WO 2021134865A1
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Prior art keywords
layer
shielding layer
shielding
cable
unit structure
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PCT/CN2020/075993
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English (en)
French (fr)
Inventor
周端希
王德全
倪冬华
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浙江兆龙互连科技股份有限公司
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Publication of WO2021134865A1 publication Critical patent/WO2021134865A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22—Metal wires or tapes, e.g. made of steel

Definitions

  • the invention relates to the technical field of cables, in particular to high-speed cables and unit structures thereof.
  • Data transmission cable is an important carrier to realize data signal transmission and exchange.
  • the research and development of cable products will face new technological changes and innovations. On the one hand, it is necessary to increase the transmission rate to meet the transmission and exchange of large-capacity information, and on the other hand, it is necessary to improve transmission stability and improve the quality of information transmission.
  • Biaxial parallel copper cables have the advantages of high speed, low delay, small size and low cost, and are widely used in communication transmission, data center, information service and other fields to meet the high-speed transmission of large-capacity audio, video, image and other data signals And exchange.
  • Parallel twin-axial cables for digital communication are composed of multiple pairs of horizontally arranged pairs of units, which usually include two parallel insulated single wires and a covered shield and drain wire.
  • the shielding structure can not only shield the external electromagnetic signal, but also block the electromagnetic leakage of the cable itself, which plays an important role in maintaining the stability of the transmission network.
  • the arranged drain wire directly contacts the shielding layer, and the subsequent winding protection It is easy to cause wrinkles in the shielding layer of the contact part when it is sleeved, which affects the shielding effect, and then affects the transmission efficiency.
  • the first object of the present invention is to provide a high-speed cable unit structure with compact structure and good shielding effect.
  • the second object of the present invention is to provide a high-speed cable adopting the unit structure.
  • the present invention adopts the following technical solutions:
  • the high-speed cable unit structure includes a cable core, a low-dielectric material layer covering the cable core, a shielding layer, and a first outer covering layer covering the shielding layer, the cable core including two inner conductors And the insulating layer extruded outside the inner conductor, the low dielectric material layer is wrapped around the cable core, the shielding layer includes a first shielding layer and a second shielding layer, the first shielding layer is parallel and longitudinally wrapped in Outside the cable core, the second shielding layer is wrapped around the first shielding layer.
  • a drain wire is also provided between the cable core and the first shielding layer or between the second shielding layer and the first outer coating layer.
  • the drain wire is a circular or flat metal conductor.
  • the shielding layer is a composite of metal and plastic
  • the metal is copper, aluminum or a copper-aluminum composite material
  • the first shielding layer facing inward is an aluminum surface or a copper surface
  • the second shielding layer facing outwards The surface is aluminum or copper.
  • the insulating layer is made of fluoroplastics or polyolefin materials.
  • the cable core is coated with a low-dielectric material layer, and the low-dielectric material layer is made of any one of foamed PE or other polyolefin or fluorine-based materials.
  • the high-speed cable includes at least one set of unit structures as described above.
  • the high-speed cable includes two sets of the unit structures arranged side by side, and a third shielding layer, a first tape layer, a braid layer and a second outer coating layer that are sequentially wrapped around the two sets of unit structures ,
  • the gap between the first wrapping tape layer and the unit structure is allowed to be provided with fillers.
  • the high-speed cable includes two groups of the unit structures arranged side by side, six groups of the unit structures uniformly arranged around the two groups of unit structures, and a second package sequentially wrapped around the unit structures
  • the belt layer, the third shielding layer, the braided layer and the second outer covering layer are located outside the two groups of the unit structure and there is also a first belt layer located in the gap between the first belt layer and the unit structure Filling is allowed at the place.
  • the present invention adopts the above technical scheme, and has the following beneficial effects: through the longitudinally wrapped shield, the wrapping shield is added, and the double shielding structure can not only realize the omnidirectional shielding of the cable core, but also effectively block the external electromagnetic signal and maintain the transmission.
  • the stability of the network, and the shielding structure is more compact, not easy to fold and deform, the thickness of the aluminum base is increased, and the shielding effect is strengthened.
  • Figure 1 is a schematic diagram of the high-speed cable unit structure of the present invention.
  • Figure 2 is a schematic diagram of the high-speed cable structure of the present invention including two sets of unit structures;
  • Figure 3 is a schematic diagram of the high-speed cable structure of the present invention including eight groups of unit structures.
  • orientation or positional relationship of other indications is based on the orientation or positional relationship shown in the drawings, which is only used to facilitate the description of the application and simplify the description, and does not indicate or imply that the device or element referred to must have a specific orientation or a specific orientation.
  • the azimuth structure and operation cannot be understood as a limitation of this application.
  • the high-speed cable unit structure includes a cable core, a shielding layer covering the cable core, and a first outer coating layer 7 covering the shielding layer.
  • the cable core includes two The inner conductor 1 and the insulating layer 2 extruded outside the inner conductor 1, the cable core is wrapped with a low-dielectric material layer through a high-speed wrapping equipment, and the low-dielectric material layer 3 is made of foamed PE or other polyolefins. Or any of fluorine-based materials.
  • the shielding layer includes a first shielding layer 5 and a second shielding layer 6, the first shielding layer 5 is parallel and longitudinally wrapped outside the cable core, and the second shielding layer 6 is wrapped outside the first shielding layer 5 .
  • the first shielding layer 5 adopts the longitudinal wrapping method to support a larger bandwidth than the wrapping method.
  • the second shielding layer 6 adopts the wrapping method to wrap the shielding layer to make the structure more compact, increase the thickness of the aluminum base and improve the shielding effect .
  • Two drain wires 4 are arranged between the second shielding layer 6 and the outer first outer coating layer 7.
  • the drain wires have a circular cross-section, and the drain wires 4 are located in the second shielding layer.
  • the first shielding layer 5 is closely attached to the second shielding layer 6, and the contact surface between the second shielding layer 6 and the drain wire 4 is smooth and flat. , The contact surface is not easy to produce wrinkles, and the shielding effect is not affected.
  • the drain wire 4 mainly plays the role of grounding and tensile resistance. Under good and correct grounding conditions, the shielding layer plays the role of blocking the electromagnetic leakage of the cable itself and shielding the external electromagnetic signals.
  • the internal The double-layer shielding structure of the longitudinal and outer wrapping can provide a full shielding effect on the signals inside and outside the cable.
  • the inner conductor 1 may be a plated metal material, an unplated metal material, or an alloy material; an insulating layer 2 is extruded from the inner conductor 1, and the insulating layer 2 is made of fluoroplastic or Polyolefin materials, including but not limited to FEP materials, PE materials, foamed PE materials, etc.; the shielding layer is an aluminum foil layer, a copper foil layer, or a copper-aluminum composite layer, and the first shielding layer 5 faces inward
  • the surface of the second shielding layer 6 is aluminum surface or copper surface, and the surface of the second shielding layer 6 is aluminum surface or copper surface.
  • the first outer coating layer 7 includes but not limited to hot melt PET tape layer and PP tape layer. Any kind.
  • the structure is substantially the same as that of embodiment 1.
  • the main difference is that there is no low-dielectric material layer outside the insulating layer of the cable core, and the second shielding layer 6 and the first outer covering A drain wire 4 is arranged between the layers 7, and the drain wire 4 is located on the right side of the second shielding layer 6.
  • the structure is substantially the same as that of embodiment 1, and the main difference is that a drain wire 4 is provided between the second shielding layer 6 and the first outer coating layer 7, and the drain
  • the cross section of the wire 4 is flat, and the drain wire 4 is located in the middle of the upper side of the second shielding layer 6.
  • the flat wire has a smaller volume than the round wire, which helps to reduce the outer diameter of the cable.
  • the drain wire 4 is a plated metal wire or a bare copper wire or an alloy copper wire.
  • the structure is substantially the same as that of embodiment 1.
  • the main difference is that there is no low-dielectric material layer outside the insulating layer of the cable core, and the second shielding layer 6 is connected to the first outer casing.
  • a drain wire 4 is arranged between the coating layers 7, the cross section of the drain wire 4 is flat, and the drain wire 4 is located in the middle of the upper side of the second shielding layer 6.
  • the structure is substantially the same as that of embodiment 1, the main difference is that a drain wire 4 is provided between the first shielding layer 5 and the low dielectric material layer, and the drain wire 4 is located in the low The left side of the dielectric material layer.
  • the structure is substantially the same as that of embodiment 1.
  • the main difference is that there is no low dielectric material layer outside the insulating layer of the cable core, and the first shielding layer 5 and the insulating layer 2 are separated from each other.
  • Two drain wires 4 are provided, and the drain wires 4 are located on the left and right sides of the insulating layer 2.
  • the structure is substantially the same as that of embodiment 1, and the main difference is that two drain wires 4 are arranged between the first shielding layer 5 and the low dielectric material layer.
  • the cross section of is flat, and the drain line 4 is located in the middle of the upper and lower sides of the low dielectric material layer.
  • the high-speed cable includes at least one set of the unit structure.
  • the cable includes two groups of the unit structures arranged side by side up and down, and the two groups of unit structures are sequentially covered with a third shielding layer 10, a first wrapping layer 9, and a braided layer 12. And the second outer coating layer 13 is provided with a filler 8 in the gap between the first wrapping tape layer 9 and the unit structure.
  • the cable has a compact structure and a round appearance.
  • the middle part of the high-speed cable has two groups of the unit structures arranged up and down side by side, and the two groups of unit structures are provided with a first banding layer 9 located between the first banding layer 9 and Fillers 8 are arranged in the gaps of the unit structure, and the six groups of unit structures are evenly distributed around the unit structure on the outside of the first tape layer 9, and the second tape layer 11 is sequentially arranged on the outside, and the third The shielding layer 10, the braided layer 12 and the second outer covering layer 13.
  • the cable has a compact structure and a round appearance.

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  • Insulated Conductors (AREA)
  • Communication Cables (AREA)

Abstract

一种高速线缆及其单元结构，涉及电缆技术领域，所述单元结构包括缆芯、包覆在该缆芯外的低介质材料层（3）、屏蔽层和包覆在该屏蔽层外的第一外包覆层（7），所述缆芯包括两根内导体（1）及在内导体（1）外挤出的绝缘层（2），所述低介质材料层（3）绕包于缆芯之外，所述屏蔽层包括第一屏蔽层（5）与第二屏蔽层（6），所述第一屏蔽层（5）平行纵包于缆芯之外，所述第二屏蔽层（6）绕包于第一屏蔽层（5）之外。所述高速线缆，包括至少一组所述单元结构。该高速线缆单元结构在纵包屏蔽基础上增加一层绕包屏蔽，使得结构紧凑，不易褶皱变形，同时增加了铝基厚度提高了屏蔽效果。

Description

高速线缆及其单元结构 技术领域
本发明涉及电缆技术领域，具体涉及高速线缆及其单元结构。
 背景技术
随着数据网络的不断发展，信息沟通越来越频繁，信息交换容量也越来越大。数据传输电缆是实现数据信号传输与交换的重要载体。电缆产品的研发将面临着新的技术变革与创新，一方面要提高传输速率，满足大容量信息的传输与交换，另一方面要提高传输稳定性，提高信息传输的质量。
双轴平行铜缆具有高速，低时延，尺寸小以及成本低等优点而被广泛应用于通信传输、数据中心、信息服务等领域，满足大容量的音频、视频、图像等数据信号的高速传输与交换。
 技术问题
数字通信用平行双轴电缆是由多组横向排列的对单元组合而成，所述对单元通常包含两根平行的绝缘单线和包覆屏蔽以及排流线。所述屏蔽结构不仅可以屏蔽外界的电磁信号，也同时阻断了线缆本身的电磁泄露，对保持传输网络的稳定性具有重要作用，然而布置的排流线与屏蔽层直接接触，后续缠绕护套时较易导致接触部分的屏蔽层产生褶皱，影响屏蔽效果，进而影响传输效率。
 技术解决方案
为了解决上述问题，本发明的第一个目的在于提供一种结构紧凑、屏蔽效果好的高速线缆单元结构，本发明的第二个目的是提供一种采用该单元结构的高速线缆。
为了实现上述的第一个目的，本发明采用了以下的技术方案：
高速线缆单元结构，包括缆芯、包覆在该缆芯外的低介质材料层、屏蔽层和包覆在该屏蔽层外的第一外包覆层，所述缆芯包括两根内导体及在内导体外挤出的绝缘层，所述低介质材料层绕包于缆芯之外，所述屏蔽层包括第一屏蔽层与第二屏蔽层，所述第一屏蔽层平行纵包于缆芯之外，所述第二屏蔽层绕包于第一屏蔽层之外。
作为优选方案：所述缆芯与第一屏蔽层之间或是第二屏蔽层与第一外包覆层之间还设有排流线。
作为优选方案：所述排流线 为圆形或是扁平形金属导体。
作为优选方案：所述屏蔽层为金属与塑料的复合物，金属为铜、铝或者铜铝复合材料，所述第一屏蔽层朝内的为铝面或是铜面，第二屏蔽层朝外的为铝面或是铜面。
作为优选方案：所述绝缘层采用氟塑料或者聚烯烃类材料。
作为优选方案：所述缆芯外包覆有低介质材料层，所述低介质材料层采用发泡PE或其它聚烯烃或氟类材料等中的任意一种。
为了实现上述的第二个目的，本发明采用了以下的技术方案：
高速线缆，包括至少一组如上任意所述的单元结构。
作为优选方案：所述高速线缆包含并列设置的两组所述单元结构以及依次包覆于两组单元结构外的第三屏蔽层，第一包带层，编织层和第二外包覆层，位于所述第一包带层与所述单元结构的间隙处允许设有填充物。
作为优选方案：所述高速线缆包含并列设置的两组所述单元结构，环绕两组所述单元结构均匀设置的六组所述单元结构以及依次包覆于所述单元结构外的第二包带层，第三屏蔽层，编织层和第二外包覆层，位于两组所述单元结构外还设有第一包带层，位于所述第一包带层与所述单元结构的间隙处允许设有填充物。
 有益效果
本发明采用上述技术方案，有如下的有益效果：通过纵包屏蔽外增加绕包屏蔽，所述双屏蔽结构既能实现对缆芯的全方位屏蔽，又能有效阻隔外界的电磁信号，保持传输网络的稳定性，且屏蔽结构更为紧凑，不易褶皱变形，铝基厚度提高，屏蔽效果加强。
 附图说明
图1为本发明的高速线缆单元结构的示意图；
图2为本发明包含两组单元结构的高速线缆结构示意图；
图3为本发明包含八组单元结构的高速线缆结构示意图。
1-内导体，2-绝缘层，3-电介质层，4-排流线，5-第一屏蔽层，6-第二屏蔽层，7-第一包覆层，8-填充物，9-第一包带层，10-第三屏蔽层，11-第二包带层，12-编织层，13-第二外包覆层。
 本发明的最佳实施方式
为了相关技术人员更清晰的了解本发明的技术方案，现结合附图对本发明做进一步的详细说明。
在本申请的描述中，需要理解的是，术语 “上”、“下”、“侧”、“左”、“右”
等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
实施例 1
如图1所示，高速线缆单元结构，包括缆芯、包覆在该缆芯外的屏蔽层和包覆在该屏蔽层外的第一外包覆层7，所述缆芯包括两根内导体1及于内导体1外挤出的绝缘层2，所述缆芯通过高速绕包设备绕包一层低介质材料层，所述低介质材料层3采用比如发泡PE或其它聚烯烃或氟类材料等材料中的任意一种。
所述屏蔽层包括第一屏蔽层5与第二屏蔽层6，所述第一屏蔽层5平行纵包于缆芯之外，所述第二屏蔽层6绕包于第一屏蔽层5之外。第一屏蔽层5采用纵包方式比绕包方式包覆能支持到更大的带宽，第二屏蔽层6采用绕包方式包覆屏蔽层使结构更加紧凑，增加了铝基厚度提高了屏蔽效果。
所述第二屏蔽层6与外第一外包覆层7之间设置有两根排流线4，所述排流线的截面为圆形，所述排流线4位于所述第二屏蔽层6的左右两侧，所述第一屏蔽层5与第二屏蔽层6紧密贴合，所述第二屏蔽层6与所述排流线4的接触面光滑平整，绕包外护套时，接触面不易产生褶皱，屏蔽效果不受影响。所述排流线4主要起到接地和抗拉的作用，在良好正确的接地条件下，屏蔽层起到对线缆本身电磁泄漏的阻断以及对外来电磁信号的屏蔽，本发明采用的内纵包外绕包的双层屏蔽结构，可以起到对线缆内外信号全方位的屏蔽效果。
高速线缆单元结构，所述内导体1可以是镀层金属材料或者无镀层金属材料亦或是合金材料；所述内导体1外挤出一层绝缘层2，所述绝缘层2采用氟塑料或者聚烯烃类材料，包括但不限于FEP材料、PE材料、发泡PE材料等；所述屏蔽层为铝箔层或是铜箔层亦或是铜铝复合层，所述第一屏蔽层5朝内的为铝面或是铜面，第二屏蔽层6朝外的为铝面或是铜面；所述第一外包覆层7为包括但不限于热融PET带层、PP带层中的任意一种。
在其他实施例中，采用与实施例1大体相同的结构，主要区别在于，所述缆芯的绝缘层外并没有设置低介质材料层，且所述第二屏蔽层6与第一外包覆层7之间设置有一根排流线4，所述排流线4位于所述第二屏蔽层6的右侧。
在另一实施例中，采用与实施例1大体相同的结构，主要区别在于，所述第二屏蔽层6与第一外包覆层7之间设置有一根排流线4，所述排流线4的截面为扁形，且排流线4位于所述第二屏蔽层6的上侧的中部。扁平线相较圆线拥有更小的体积，利于减小线缆外径。所述排流线4为镀层金属线或是裸铜线或是合金铜线。
在另一实施例中，采用与实施例1大体相同的结构，主要区别在于，所述缆芯的绝缘层外并没有设置低介质材料层，且所述第二屏蔽层6与第一外包覆层7之间设置有一根排流线4，所述排流线4的截面为扁形，且排流线4位于所述第二屏蔽层6的上侧的中部。
在另一实施例中，采用与实施例1大体相同的结构，主要区别在于，所述第一屏蔽层5与低介质材料层之间设置有一根排流线4，且排流线4位于低介质材料层的左侧。
在另一实施例中，采用与实施例1大体相同的结构，主要区别在于，所述缆芯的绝缘层外并没有设置低介质材料层，所述第一屏蔽层5与绝缘层2之间设置有两根排流线4，且排流线4位于绝缘层2的左右两侧。
在另一实施例中，采用与实施例1大体相同的结构，主要区别在于，所述第一屏蔽层5与低介质材料层之间设置有两根排流线4，所述排流线4的截面为扁形，且排流线4位于低介质材料层的上下两侧的中部。
高速线缆，包括至少一组所述的单元结构。
如图2所示，所述线缆包括上下并列排布的两组所述单元结构，两组所述单元结构外依次包覆有第三屏蔽层10，第一包带层9，编织层12以及第二外包覆层13，位于所述第一包带层9与所述单元结构的间隙处还设有填充物8。所述线缆结构紧凑，外观圆整。
如图3所示，所述高速线缆中部上下并列排布有两组所述单元结构，两组所述单元结构外设有第一包带层9，位于所述第一包带层9与所述单元结构的间隙处设有填充物8，六组所述单元结构环绕上述单元结构均匀分布于第一包带层9外侧，并于其外依次设置有第二包带层11，第三屏蔽层10，编织层12和第二外包覆层13。所述线缆结构紧凑，外观圆整。
以上所述的仅是本发明的优选实施方式。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明原理的情况下，还可以作出若干改进和变型，这也视为本发明的保护范围。

Claims (9)

  1. 高速线缆单元结构，其特征在于：包括缆芯、包覆在该缆芯外的低介质材料层、屏蔽层和包覆在该屏蔽层外的第一外包覆层（7），所述缆芯包括两根内导体（1）及在内导体（1）外挤出的绝缘层(2)，所述低介质材料层(3)绕包于缆芯之外，所述屏蔽层包括第一屏蔽层(5)与第二屏蔽层(6)，所述第一屏蔽层(5)平行纵包于缆芯之外，所述第二屏蔽层(6)绕包于第一屏蔽层(5)之外。
  2. 根据权利要求1所述的高速线缆单元结构，其特征在于：所述缆芯与第一屏蔽层(5)之间或是第二屏蔽层(6)与第一外包覆层(7)之间还设有排流线(4)。
  3. 根据权利要求2所述的高速线缆单元结构，其特征在于：所述排流线(4) 为圆形或是扁平形金属导体。
  4. 根据权利要求1所述的高速线缆单元结构，其特征在于：所述屏蔽层为金属与塑料的复合物，金属为铜、铝或者铜铝复合材料，所述第一屏蔽层(5)朝内的为铝面或是铜面，第二屏蔽层(6)朝外的为铝面或是铜面。
  5. 根据权利要求1所述的高速线缆单元结构，其特征在于：所述绝缘层(2)采用氟塑料或者聚烯烃类材料。
  6. 根据权利要求1所述的高速线缆单元结构，其特征在于：所述缆芯外包覆有低介质材料层(3)，所述低介质材料层(3)采用发泡PE或其它聚烯烃或氟类材料等中的任意一种。
  7. 高速线缆，其特征在于：包括至少一组权利要求1-6任一所述的单元结构。
  8. 根据权利要求7所述的高速线缆，其特征在于:所述高速线缆包含并列设置的两组所述单元结构以及依次包覆于两组单元结构外的第三屏蔽层（10），第一包带层（9），编织层（12）和第二外包覆层（13），位于所述第一包带层（9）与所述单元结构的间隙处允许设有填充物（8）。
  9. 根据权利要求7所述的高速线缆单元结构，其特征在于: 所述高速线缆包含并列设置的两组所述单元结构，环绕两组所述单元结构均匀设置的六组所述单元结构以及依次包覆于所述单元结构外的第二包带层（11），第三屏蔽层（10），编织层（12）和第二外包覆层（13），位于两组所述单元结构外还设有第一包带层（9），位于所述第一包带层（9）与所述单元结构的间隙处允许设有填充物（8）。
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