WO2021031684A1 - 电缆 - Google Patents

电缆 Download PDF

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Publication number
WO2021031684A1
WO2021031684A1 PCT/CN2020/097525 CN2020097525W WO2021031684A1 WO 2021031684 A1 WO2021031684 A1 WO 2021031684A1 CN 2020097525 W CN2020097525 W CN 2020097525W WO 2021031684 A1 WO2021031684 A1 WO 2021031684A1
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WO
WIPO (PCT)
Prior art keywords
water
layer
conductor
blocking
cable
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PCT/CN2020/097525
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English (en)
French (fr)
Inventor
蔡红祥
谢书鸿
张建民
付长琦
侯虹剑
钱浩
丛思玮
夏云海
周玉军
Original Assignee
中天科技海缆股份有限公司
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Priority to AU2020334655A priority Critical patent/AU2020334655B2/en
Publication of WO2021031684A1 publication Critical patent/WO2021031684A1/zh

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • H01B7/2825Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • H01B7/285Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • H01B7/285Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
    • H01B7/288Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable using hygroscopic material or material swelling in the presence of liquid
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00Power cables
    • H01B9/02Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/14Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

Definitions

  • the invention relates to the field of wire and cable manufacturing, in particular to a cable.
  • a cable comprising at least three cable cores, a filling layer, a water blocking layer, a composite layer, and an outer sheath sequentially covering the outer sides of the at least three cable cores, and each of the cable cores includes The water-blocking conductor, the conductor shielding layer, the insulating layer, the insulating shielding layer, the first water-blocking tape, the shielding layer, the second water-blocking tape, the first composite tape, and the first sheath provided by the coating, the first sheath Tangent to the filling layer, the outer sides of the at least three cable cores are tangentially arranged to form an accommodating space, and the accommodating space is filled with a water-blocking filling rope.
  • the water-blocking conductor includes a central conductor and a plurality of outer conductor layers that are twisted in sequence with the central conductor as an axis, and each of the outer conductor layers is composed of a plurality of conductors that are twisted around the central conductor.
  • a semi-conductive resistance hose is arranged between the central conductor and each of the outer conductor layers to prevent water from intruding into the water blocking conductor longitudinally.
  • the conductor shielding layer is extruded on the water blocking conductor with a semi-conductive material.
  • the insulating layer is uniformly extruded on the conductor shielding layer with a cross-linked polyethylene material.
  • the insulating shielding layer includes insulated cores, and then adopts a semi-conductive layer that is directly extruded on the outer surface of each insulated core and is tightly combined with the insulated core or can be peeled off.
  • first sheath, the filling layer and the outer sheath are made of polyethylene materials.
  • the shielding layer is a copper wire shielding layer.
  • the composite layer is an aluminum-plastic composite tape or a lead sleeve.
  • first water blocking tape and the second water blocking tape are both double-sided semiconductive resistance water tapes.
  • the above-mentioned cable includes at least three cable cores, a filling layer, a water blocking layer, a composite layer, and an outer sheath successively covering the outside of the at least three cable cores, from the outer sheath to the inner sheath.
  • Water-blocking conductor each layer can be water-blocked, has better water-blocking performance, can prevent the longitudinal and radial intrusion of water into the cable multiplely and efficiently, and ensure the safe operation of the cable.
  • Fig. 1 is a schematic structural diagram of a cable in an embodiment of the present invention.
  • First composite belt 18 First sheath 19 Water blocking filling rope 101 Filling layer 20 Stuffing twenty one Water blocking layer 30 Composite layer 40 Outer sheath 50
  • a component when a component is said to be “fixed to” another component, it can be directly on the other component or a central component may also exist.
  • a component When a component is considered to be “connected” to another component, it can be directly connected to another component or there may be a centered component at the same time.
  • a component When a component is considered to be “set on” another component, it can be directly set on another component or a centered component can exist at the same time.
  • the cable 100 shown in FIG. 1 is used for the transmission of electric energy.
  • the cable 100 includes at least three cable cores 10, a filling layer 20 and a water blocking layer that are sequentially wrapped around the at least three cable cores 10 30.
  • Each of the cable cores 10 includes a water-blocking conductor 11 and a conductor shielding layer 12 sheathed outside the water-blocking conductor 11.
  • the water-blocking conductor 11 includes a central conductor (not shown) and takes the central conductor as A plurality of outer conductor layers (not shown in the figure) which are twisted sequentially on the axis.
  • Each of the outer conductor layers is formed by twisting a plurality of conductors with a central conductor as the axis, and a semi-conductive resistance hose is arranged between the central conductor and each of the outer conductor layers to effectively prevent the longitudinal intrusion of moisture into the Water blocking conductor 11.
  • the conductor shielding layer 12 is squeezed on the water blocking conductor with a semi-conductive material to prevent the water blocking conductor 11 from generating partial discharge.
  • An insulating layer 13 is sheathed on the outer side of the conductor shielding layer 12, and the insulating layer 13 has an insulating effect.
  • the insulating layer 13 is uniformly extruded on the conductor shield by using a cross-linked polyethylene material.
  • the insulating layer 13 is sheathed with an insulating shielding layer 14.
  • the insulating shielding layer 14 includes insulated cores, which are then directly extruded on the outer surface of each insulated core, and are connected to the insulated cores. Tightly bonded or peelable semi-conductive layer.
  • a first water-blocking tape 15 is sheathed on the outer side of the insulating shielding layer 14, a shielding layer 16 is sheathed on the outer side of the first water-blocking tape 15, and a second water-blocking tape 17 is sheathed on the outer side of the shielding layer 16
  • the shielding layer 16 is a copper wire shielding layer
  • the first water-blocking tape 15 and the second water-blocking tape 17 are double-sided semi-conductive resistance water tapes. The first water blocking tape 15 and the second water blocking tape 17 swell in contact with water, thereby effectively preventing water from intruding into the cable 100 longitudinally along the copper wire gap.
  • the outer side of the second water blocking tape 17 is wrapped with a first composite tape 18, the first composite tape 18 can assist the shielding layer 16, carry part of the short-circuit current, and can effectively prevent moisture from the cable 100 Radial invasion.
  • the first composite tape 18 may be an aluminum-plastic composite tape or a lead sleeve.
  • a first sheath 19 is sheathed on the outer side of the first composite belt 18, and the first sheath 19 is tangent to the filling layer 20 for water blocking.
  • the first sheath 19 is made of polyethylene material. The polyethylene material has strong water-blocking performance and effectively prevents the radial intrusion of moisture.
  • the cable core 10 further includes a water-blocking filling rope 101, the outer sides of the at least three cable cores are arranged tangentially to form an accommodating space (not labeled), and the water-blocking filling rope is filled in the accommodating space. In the space.
  • the water-blocking filling rope 101 rapidly expands when exposed to water to prevent water from intruding into the cable core 10 longitudinally.
  • the number of the cable cores 10 is three, and the cross-sections of the three cable cores 10 are arranged tangentially, and the gap formed by the three cable cores 10 is filled with water-blocking filling ropes. 101.
  • the filling layer 20 is sleeved on the outside of the cable core 10.
  • the filling layer 20 is made of polyethylene material and is produced by die extrusion.
  • the filling layer 20 and the gap formed by the cable core 10 are provided with a filler 21.
  • the filler 21 and the filling layer 20 are integrally provided and are made of polyethylene.
  • the polyethylene material itself has high compactness and strong water blocking performance, which can prevent the longitudinal and radial intrusion of moisture.
  • the water blocking layer 30 is sleeved on the outside of the filling layer 20.
  • the water blocking layer 30 is wrapped around the outer layer of the filling layer 20 by double-sided insulating water blocking tape. The layer 30 swells when exposed to water, which effectively prevents water from entering the cable 100 longitudinally.
  • the composite layer 40 is sleeved on the outside of the water blocking layer 30. When the cable 100 is damaged by an external force, the composite layer 40 can prevent external moisture from intruding into the cable radially.
  • the composite layer 40 is a lead sheath, which has high compactness and can effectively block the radial intrusion of moisture, and can also carry part of the short-circuit current.
  • the composite layer 40 can also be an aluminum-plastic composite tape.
  • the outer sheath 50 is sleeved on the outside of the composite layer 40.
  • the outer sheath 50 is made of polyethylene material.
  • the polyethylene material is hard and not easy to be broken during the construction process. At the same time, it blocks water. The effect is good, effectively preventing moisture from intruding into the cable 100 radially.
  • the water blocking conductor 11 When the cable 100 is in use, the water blocking conductor 11, the first water blocking tape 15, the second water blocking tape 17, the first composite tape 18, the first sheath 19, the filling layer 20, and the water blocking filling rope 101
  • the water-blocking layer 30, the composite layer 40, and the outer sheath 50 all have water-blocking properties. From the outer outer sheath 50 to the inner water-blocking conductor 11, all have multiple water-blocking properties, which provide multiple protections for the cable 100.
  • the gaps between the plurality of cable cores 10 are filled with water-blocking filling rope 101 using an extrusion process, which solves the problem of large gaps in cable formation and poor water blocking effect.
  • the above-mentioned cable 100 from the outer outer sheath 50 to the inner water-blocking conductor 11, can block water in each layer, has better water-blocking performance, and can prevent the longitudinal and radial intrusion of moisture into the cable multiplely and efficiently, ensuring the cable Safe operation.

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  • Insulated Conductors (AREA)
  • Flexible Shafts (AREA)

Abstract

一种电缆,所述电缆包括至少三个缆芯以及依次包覆在所述至少三个缆芯外侧的填充层、阻水层、复合层以及外护套,每一个所述缆芯包括由内而外依次包覆设置的阻水导体、导体屏蔽层、绝缘层、绝缘屏蔽层、第一阻水带、屏蔽层、第二阻水带、第一复合带及第一护套,所述第一护套与所述填充层相切,所述至少三个缆芯的外侧相切设置以形成一容置空间,所述容置空间内填充有阻水填充绳。本发明提供的电缆,从外部外护套到内部阻水导体,每层均可进行阻水,具有更好的阻水性能,能够多重、高效地阻止水分纵向、径向侵入电缆,保证了电缆的运行安全。

Description

电缆 技术领域
本发明涉及电线电缆制造领域,尤其涉及一种电缆。
背景技术
由于施工需要,部分电缆需长期敷设在水中。因此若电缆阻水效果不好,电缆长时间运行过程中,水汽易对绝缘产生水树,继而绝缘造成击穿,水分的存在大大减少了电缆的寿命,因此针对此敷设环境,电缆必须具有极高的阻水性能。普通的三芯阻水电缆,只能对导体以及各层进行纵向阻水,无法进行径向阻水。同时由于成缆缝隙大,使用的填充无法有效阻止水纵向侵入,同时使用的护套材料也无法有效地阻止水径向进入。
发明内容
有鉴于此,有必要提供一种电缆,能够有效防止水分侵入。
一种电缆,包括至少三个缆芯以及依次包覆在所述至少三个缆芯外侧的填充层、阻水层、复合层以及外护套,每一个所述缆芯包括由内而外依次包覆设置的阻水导体、导体屏蔽层、绝缘层、绝缘屏蔽层、第一阻水带、屏蔽层、第二阻水带、第一复合带及第一护套,所述第一护套与所述填充层相切,所述至少三个缆芯的外侧相切设置以形成一容置空间,所述容置空间内填充有阻水填充绳。
进一步的,所述阻水导体包括中心导体以及以所述中心导体为轴心依次绞合的多个外导体层,每一所述外导体层都由若干导体以所述中心导体为轴心绞合而成。
进一步的,所述中心导体以及每一个所述外导体层之间设有半导电阻水带 以防止水分纵向侵入所述阻水导体。
进一步的,所述导体屏蔽层采用半导电材料挤包在阻水导体上。
进一步的,所述绝缘层采用交联聚乙烯材料均匀的挤包在导体屏蔽层上。
进一步的,所述绝缘屏蔽层包含绝缘线芯,然后采用直接挤包在每根绝缘线芯外表面,并与绝缘线芯紧密结合或可剥离的半导电层。
进一步的,所述第一护套、所述填充层以及所述外护套采用聚乙烯材料。
进一步的,所述屏蔽层为铜丝屏蔽层。
进一步的,所述复合层为铝塑复合带或铅套。
进一步的,所述第一阻水带及第二阻水带均为双面半导电阻水带。
与现有技术相比,上述电缆包括至少三个缆芯以及依次包覆在所述至少三个缆芯外侧的填充层、阻水层、复合层以及外护套,从外部外护套到内部阻水导体,每层均可进行阻水,具有更好的阻水性能,能够多重、高效地阻止水分纵向、径向侵入电缆,保证了电缆的运行安全。
附图说明
图1为本发明一实施方式中的电缆的结构示意图。
主要元件符号说明
电缆 100
缆芯 10
阻水导体 11
导体屏蔽层 12
绝缘层 13
绝缘屏蔽层 14
第一阻水带 15
屏蔽层 16
第二阻水带 17
第一复合带 18
第一护套 19
阻水填充绳 101
填充层 20
填充物 21
阻水层 30
复合层 40
外护套 50
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是仅仅本发明的一部分实施例,而不是全部的实施例。
需要说明的是,当组件被称为“固定于”另一个组件,它可以直接在另一个组件上或者也可以存在居中的组件。当一个组件被认为是“连接”另一个组件,它可以是直接连接到另一个组件或者可能同时存在居中组件。当一个组件被认为是“设置于”另一个组件,它可以是直接设置在另一个组件上或者同时存在居中组件。
除非另有定义,本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的,不是旨在于限制本发明。本文所使用的术语“或/及”包括一个或多个相关的所列项目的任意的和所有的组合。
请参阅图1,图1所示电缆100用于电能的传输,所述电缆100包括至少三个缆芯10以及依次包覆在所述至少三个缆芯10外侧的填充层20、阻水层30、复合层40以及外护套50。
每一个所述缆芯10包括阻水导体11和套设在所述阻水导体11外侧的导体屏蔽层12,所述阻水导体11包括中心导体(图未示)以及以所述中心导体为 轴心依次绞合的多个外导体层(图未示)。每一所述外导体层由若干导体以中心导体为轴心绞合而成,所述中心导体以及各所述外导体层之间设有半导电阻水带,从而有效防止水分纵向侵入所述阻水导体11。所述导体屏蔽层12采用半导电材料挤包在所述阻水导体上,以防止所述阻水导体11产生局部放电。所述导体屏蔽层12外侧套设有绝缘层13,所述绝缘层13起到绝缘效果,在一实施方式中,所述绝缘层13采用交联聚乙烯材料均匀地挤包于所述导体屏蔽层12上。所述绝缘层13外侧套设有绝缘屏蔽层14,在一实施方式中,所述绝缘屏蔽层14包含绝缘线芯,然后采用直接挤包在每根绝缘线芯外表面,并与绝缘线芯紧密结合或可剥离的半导电层。所述绝缘屏蔽层14外侧套绕包有第一阻水带15,所述第一阻水带15外侧套设有屏蔽层16,所述屏蔽层16外侧套绕包有第二阻水带17,在一实施方式中,所述屏蔽层16为铜丝屏蔽层,所述第一阻水带15和所述第二阻水带17为双面半导电阻水带。所述第一阻水带15和所述第二阻水带17遇水膨胀,从而有效阻止水分沿铜丝缝隙纵向侵入所述电缆100内部。所述第二阻水带17外侧套绕包有第一复合带18,所述第一复合带18可协助所述屏蔽层16,承载部分短路电流,并且可以有效阻止水分从所述电缆100的径向侵入。在一实施方式中,所述第一复合带18可为铝塑复合带或铅套。所述第一复合带18外侧套设有第一护套19,所述第一护套19与所述填充层20相切,用于阻水。在一实施方式中,所述第一护套19采用聚乙烯材料制成,聚乙烯材料具有较强的阻水性能,有效防止水分径向侵入。
所述缆芯10还包括阻水填充绳101,所述至少三个所述缆芯的外侧相切设置以形成一容置空间(未标号),所述阻水填充绳填充在所述容置空间内。所述阻水填充绳101遇水快速膨胀,防止水分纵向侵入所述缆芯10。在一实施方式中,所述缆芯10的数量为三个,且三个所述缆芯10横截面相切设置,三个所述缆芯10相切形成的间隙内填充有阻水填充绳101。
所述填充层20套设在所缆芯10外侧,在一实施方式中,所述填充层20使用聚乙烯材料,通过模具挤压生产。所述填充层20以及所述缆芯10形成的间隙处设置有填充物21,在一实施方式中,所述填充物21与所述填充层20一 体设置,为聚乙烯材料。聚乙烯材料本身致密性高,具有较强的阻水性能,可防止水分纵向、径向侵入。
所述阻水层30套设在所述填充层20外侧,在一实施方式中,所述阻水层30采用双面绝缘阻水带绕包在所述填充层20外层,所述阻水层30遇水膨胀,有效阻止水分纵向侵入所述电缆100。
所述复合层40套设在所述阻水层30外侧,所述电缆100受到外力破坏时,所述复合层40可防止外部水分径向侵入电缆。在一实施方式中,所述复合层40为铅套,铅套致密性较高,可有效阻水分径向侵入,同时也可承载部分短路电流。在其他实施方式中,所述复合层40还可以为铝塑复合带。
所述外护套50套设在复合层40外侧,在一实施方式中,所述外护套50采用聚乙烯材料制成,聚乙烯材料较硬,施工过程中不易被破,同时本身阻水效果较好,有效防止水分径向侵入所述电缆100。
所述电缆100在使用时,所述阻水导体11、第一阻水带15、第二阻水带17、第一复合带18、第一护套19、填充层20、阻水填充绳101、阻水层30、复合层40、外护套50均具有阻水性能,从外层外护套50到内部阻水导体11均具有多重阻水,对所述电缆100起到了多重保护。同时多个所述缆芯10缝隙间使用挤压工艺填充有阻水填充绳101,解决了成缆缝隙大、阻水效果差的问题。
上述电缆100,从外部外护套50到内部阻水导体11,每层均可进行阻水,具有更好的阻水性能,能够多重、高效地阻止水分纵向、径向侵入电缆,保证了电缆的运行安全。
本技术领域的普通技术人员应当认识到,以上的实施方式仅是用来说明本发明,而并非用作为对本发明的限定,只要在本发明的实质精神范围内,对以上实施方式所作的适当改变和变化都落在本发明要求保护的范围内。

Claims (10)

  1. 一种电缆,包括至少三个缆芯以及依次包覆在所述至少三个缆芯外侧的填充层、阻水层、复合层以及外护套,其特征在于:每一个所述缆芯包括由内而外依次包覆设置的阻水导体、导体屏蔽层、绝缘层、绝缘屏蔽层、第一阻水带、屏蔽层、第二阻水带、第一复合带及第一护套,所述第一护套与所述填充层相切,所述至少三个缆芯的外侧相切设置以形成一容置空间,所述容置空间内填充有阻水填充绳。
  2. 如权利要求1所述的电缆,其特征在于:所述阻水导体包括中心导体以及以所述中心导体为轴心依次绞合的多个外导体层,每一所述外导体层都由若干导体以所述中心导体为轴心绞合而成。
  3. 如权利要求2所述的电缆,其特征在于:所述中心导体以及每一个所述外导体层之间设有半导电阻水带以防止水分纵向侵入所述阻水导体。
  4. 如权利要求1所述的电缆,其特征在于:所述导体屏蔽层采用半导电材料挤包在阻水导体上。
  5. 如权利要求1所述的电缆,其特征在于:所述绝缘层采用交联聚乙烯材料均匀的挤包在导体屏蔽层上。
  6. 如权利要求1所述的电缆,其特征在于:所述绝缘屏蔽层包含绝缘线芯,然后采用直接挤包在每根绝缘线芯外表面,并与绝缘线芯紧密结合或可剥离的半导电层。
  7. 如权利要求1所述的电缆,其特征在于:所述第一护套、所述填充层以及所述外护套采用聚乙烯材料。
  8. 如权利要求1所述的电缆,其特征在于:所述屏蔽层为铜丝屏蔽层。
  9. 如权利要求1所述的电缆,其特征在于:所述复合层为铝塑复合带或铅套。
  10. 如权利要求1所述的电缆,其特征在于:所述第一阻水带及第二阻水带均为双面半导电阻水带。
PCT/CN2020/097525 2019-08-21 2020-06-22 电缆 WO2021031684A1 (zh)

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