WO2022257376A1 - 一种变频电缆 - Google Patents

一种变频电缆 Download PDF

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Publication number
WO2022257376A1
WO2022257376A1 PCT/CN2021/134372 CN2021134372W WO2022257376A1 WO 2022257376 A1 WO2022257376 A1 WO 2022257376A1 CN 2021134372 W CN2021134372 W CN 2021134372W WO 2022257376 A1 WO2022257376 A1 WO 2022257376A1
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core
neutral
power
cores
shielding layer
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PCT/CN2021/134372
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English (en)
French (fr)
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高峰
余纪炎
方振华
吕泳锋
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开开电缆科技有限公司
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Publication of WO2022257376A1 publication Critical patent/WO2022257376A1/zh

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    • 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
    • H01B7/02—Disposition of insulation
    • 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
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients

Definitions

  • the utility model belongs to the technical field of cables, in particular to a frequency conversion cable.
  • Frequency conversion cables are mainly used for connecting cables between variable frequency power supplies and variable frequency motors, as well as power transmission and distribution lines with a rated voltage of 1KV and below, for the transmission of electric energy, especially for papermaking, metallurgy, metal processing, mining, railways and food Processing and other industries.
  • the frequency conversion cable generally includes three power lines and three neutral wires.
  • the existing frequency conversion cables have poor shielding performance and interfere with each other.
  • the purpose of the utility model is to provide a frequency conversion cable, which has good shielding performance between cores and effectively prevents interference.
  • the utility model is achieved in that:
  • a frequency conversion cable including three power cores and three neutral cores
  • the power cores include a power core conductor, a power core insulation layer coated outside the power core conductor, and a power core insulation layer coated on the power core conductor.
  • a power core semi-conductive shielding layer outside the neutral core comprising a neutral core conductor, a neutral core insulation wrapped around the neutral core conductor and a neutral core insulation wrapped around the neutral core conductor.
  • the outer neutral wire core has a semi-conductive shielding layer, and the outside of the three power wire cores and the three neutral wire cores are covered by a sheath to form a cable, and the inside of the sheath is lined with a copper tape shielding layer.
  • the three neutral wire cores are arranged in the gaps between the three power wire cores at intervals.
  • the material of the insulating layer of the power core and the insulating layer of the neutral core is cross-linked PE, and the material of the semi-conductive shielding layer of the power core and the semi-conductive shielding layer of the neutral core is EVA, the material of the sheath is plastic.
  • the insulating layer of the power core and the semi-conductive shielding layer of the power core are extruded and coated on the outside of the conductor of the power core at the same time, and the insulating layer of the neutral core and the semi-conductive shielding layer of the neutral core The conductive shield is also extruded over the neutral core conductor.
  • the power core conductor of the utility model is covered with a power core insulation layer, and the neutral core conductor is coated with a neutral core insulation layer, which effectively insulates the power core conductor and the neutral core conductor;
  • the insulating layer of the power core is externally coated with the semi-conductive shielding layer of the power core, and the insulating layer of the neutral core is externally coated with the semi-conductive shielding layer of the neutral core, which can effectively shield the power core conductor and the neutral core conductor, so that the power line There is good shielding performance between the core and the power core, between the power core and the neutral core, and between the neutral core and the neutral core, effectively preventing interference;
  • the inner lining of the sheath is lined with copper tape
  • the shielding layer can effectively prevent external interference on the power core and neutral core;
  • the three neutral wire cores of the utility model are arranged at intervals in the gap between the three power wire cores, and the shielding effect is good;
  • the insulating layer of the power core and the semi-conductive shielding layer of the power core of the utility model are extruded and coated on the outside of the power core conductor at the same time, and the insulating layer of the neutral core and the semi-conductive shielding layer of the neutral core are extruded at the same time It is coated on the outside of the neutral core conductor, which reduces the processing steps and reduces the production cost.
  • Fig. 1 is the structural representation of the utility model.
  • a frequency conversion cable including three power cores and three neutral cores
  • the power cores include a power core conductor 1, a power core insulation layer 2 coated on the outside of the power core conductor 1 and a power core
  • the neutral core includes a neutral core conductor 4, a neutral core insulation layer 5 wrapped outside the neutral core conductor 4 and a wrapping
  • the neutral core semi-conductive shielding layer 6 covering the outside of the neutral core insulation layer 5, the outside of the three power cores and the three neutral cores are covered by a sheath 7 to form a cable, and inside the sheath 7
  • the liner is lined with a copper tape shield 8 .
  • the power line core conductor 1 of the utility model is externally coated with the power line core insulating layer 2, and the neutral line core conductor 4 is externally coated with the neutral line core insulating layer 5, so that the power line core conductor 1 and the neutral line core conductor 4 are effectively Insulation treatment;
  • the power core insulation layer 2 is externally coated with the semi-conductive shielding layer 3 of the power core, and the neutral core insulation layer 5 is externally coated with the semi-conductive shielding layer 6 of the neutral core, effectively shielding the power core conductor 1 and the neutral core Neutral core conductor 4, so that there is better shielding between the power core and the power core, between the power core and the neutral core, and between the neutral core and the neutral core, effectively preventing interference ;
  • the interior of the sheath 7 is lined with a copper tape shielding layer 8, which effectively prevents external interference to the power core and the neutral core.
  • the three neutral wire cores are arranged in the gap between the three power wire cores at intervals.
  • the material of the power core insulating layer 2 and the neutral core insulating layer 5 is cross-linked PE, and the material of the power core semi-conductive shielding layer 3 and the neutral core semi-conductive shielding layer 6 is EVA , the material of the sheath 7 is plastic.
  • the power core insulating layer 2 and the power core semi-conductive shielding layer 3 are extruded and coated on the outside of the power core conductor 1 at the same time, and the neutral core insulating layer 5 and the middle
  • the neutral core semi-conductive shielding layer 6 is extruded and coated on the outside of the neutral core conductor 4 at the same time.

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  • Insulated Conductors (AREA)

Abstract

本实用新型属于电缆技术领域，特指一种变频电缆，包括三根动力线芯和三根中性线芯，所述动力线芯包括动力线芯导体、包覆在动力线芯导体外部的动力线芯绝缘层和包覆在动力线芯绝缘层外部的动力线芯半导电屏蔽层，所述中性线芯包括中性线芯导体、包覆在中性线芯导体外部的中性线芯绝缘层和包覆在中性线芯绝缘层外部的中性线芯半导电屏蔽层，所述三根动力线芯和三根中性线芯外部通过护套包覆成缆，在所述护套内部衬装有铜带屏蔽层。本实用新型线芯与线芯之间屏蔽性好，有效防止干扰。

Description

一种变频电缆 技术领域：
本实用新型属于电缆技术领域，特指一种变频电缆。
背景技术：
变频电缆主要用于变频电源和变频电机之间连接用的电缆，以及额定电压1KV及以下的输配电线路中，作输送电能用，尤其适用于造纸、冶金、金属加工、矿山、铁路和食品加工等行业。
变频电缆一般包括三根动力线和三根中性线，现有的变频电缆各个线之间屏蔽性不好，相互干扰。
发明内容：
本实用新型的目的是提供一种变频电缆，其线芯与线芯之间屏蔽性好，有效防止干扰。
本实用新型是这样实现的：
一种变频电缆，包括三根动力线芯和三根中性线芯，所述动力线芯包括动力线芯导体、包覆在动力线芯导体外部的动力线芯绝缘层和包覆在动力线芯绝缘层外部的动力线芯半导电屏蔽层，所述中性线芯包括中性线芯导体、包覆在中性线芯导体外部的中性线芯绝缘层和包覆在中性线芯绝缘层外部的中性线芯半导电屏蔽层，所述三根动力线芯和三根中性线芯外部通过护套包覆成缆，在所述护套内部衬装有铜带屏蔽层。
在上述的一种变频电缆中，三根中性线芯间隔设置在三根动力线芯的间隙中。
在上述的一种变频电缆中，三根动力线芯和三根中性线芯绞合成缆芯，缆芯外部设有铜带屏蔽层和护套。
在上述的一种变频电缆中，所述动力线芯绝缘层和中性线芯绝缘层的材料为交联PE，所述动力线芯半导电屏蔽层和中性线芯半导电屏蔽层的材料为EVA，所述护套的材料为塑料。
在上述的一种变频电缆中，所述动力线芯绝缘层和动力线芯半导电屏蔽层同时挤出包覆在动力线芯导体外部，所述中性线芯绝缘层和中性线芯半导电屏蔽层同时挤出包覆在中性线芯导体外部。
本实用新型相比现有技术突出的优点是：
1、本实用新型的动力线芯导体外部包覆动力线芯绝缘层、中性线芯导体外部包覆中性线芯绝缘层，有效对动力线芯导体和中性线芯导体进行绝缘处理；动力线芯绝缘层外部包覆动力线芯半导电屏蔽层、中性线芯绝缘层外部包覆中性线芯半导电屏蔽层，有效屏蔽动力线芯导体和中性线芯导体，使动力线芯与动力线芯之间、动力线芯与中性线芯之间、以及中性线芯与中性线芯之间具有较好的屏蔽性，有效防止干扰；护套内部衬装有铜带屏蔽层，有效防止外部对动力线芯与中性线芯的干扰；
2、本实用新型的三根中性线芯间隔设置在三根动力线芯的间隙中，屏蔽效果好；
3、本实用新型的动力线芯绝缘层和动力线芯半导电屏蔽层同时挤出包覆在动力线芯导体外部，所述中性线芯绝缘层和中性线芯半导电屏蔽层同时挤出包覆在中性线芯导体外部，减少加工工序，生产成本低。
附图说明：
图1是本实用新型的结构示意图。
附图标记：1、动力线芯导体；2、动力线芯绝缘层；3、动力线芯半导电屏蔽层；4、中性线芯导体；5、中性线芯绝缘层；6、中性线芯半导电屏蔽层；7、护套；8、铜带屏蔽层。
具体实施方式：
下面以具体实施例对本实用新型作进一步描述，参见图1：
一种变频电缆，包括三根动力线芯和三根中性线芯，所述动力线芯包括动力线芯导体1、包覆在动力线芯导体1外部的动力线芯绝缘层2和包覆在动力线芯绝缘层2外部的动力线芯半导电屏蔽层3，所述中性线芯包括中性线芯导体4、包覆在中性线芯导体4外部的中性线芯绝缘层5和包覆在中性线芯绝缘层5外部的中性线芯半导电屏蔽层6，所述三根动力线芯和三根中性线芯外部通过护套7包覆成缆，在所述护套7内部衬装有铜带屏蔽层8。
本实用新型动力线芯导体1外部包覆动力线芯绝缘层2、中性线芯导体4外部包覆中性线芯绝缘层5，有效对动力线芯导体1和中性线芯导体4进行绝缘处理；动力线芯绝缘层2外部包覆动力线芯半导电屏蔽层3、中性线芯绝缘层5外部包覆中性线芯半导电屏蔽层6，有效屏蔽动力线芯导体1和中性线芯导体4，使动力线芯与动力线芯之间、动力线芯与中性线芯之间、以及中性线芯与中性线芯之间具有较好的屏蔽性，有效防止干扰；护套7内部衬装有铜带屏蔽层8，有效防止外部对动力线芯与中性线芯的干扰。
为了更好的屏蔽效果，三根中性线芯间隔设置在三根动力线芯的间隙中。
为了使动力线芯和中性线芯更紧实不易松散，提高电缆的圆整性，以及便于包覆铜带屏蔽层8和护套7，三根动力线芯和三根中性线芯绞合成缆芯，缆芯 外部设有铜带屏蔽层8和护套7。
优选的，所述动力线芯绝缘层2和中性线芯绝缘层5的材料为交联PE，所述动力线芯半导电屏蔽层3和中性线芯半导电屏蔽层6的材料为EVA，所述护套7的材料为塑料。
为了减少加工工序，降低生产成本，所述动力线芯绝缘层2和动力线芯半导电屏蔽层3同时挤出包覆在动力线芯导体1外部，所述中性线芯绝缘层5和中性线芯半导电屏蔽层6同时挤出包覆在中性线芯导体4外部。
上述实施例仅为本实用新型的较佳实施例之一，并非以此限制本实用新型的实施范围，故：凡依本实用新型的形状、结构、原理所做的等效变化，均应涵盖于本实用新型的保护范围之内。

Claims (5)

  1. 一种变频电缆，包括三根动力线芯和三根中性线芯，其特征在于：所述动力线芯包括动力线芯导体(1)、包覆在动力线芯导体(1)外部的动力线芯绝缘层(2)和包覆在动力线芯绝缘层(2)外部的动力线芯半导电屏蔽层(3)，所述中性线芯包括中性线芯导体(4)、包覆在中性线芯导体(4)外部的中性线芯绝缘层(5)和包覆在中性线芯绝缘层(5)外部的中性线芯半导电屏蔽层(6)，所述三根动力线芯和三根中性线芯外部通过护套(7)包覆成缆，在所述护套(7)内部衬装有铜带屏蔽层(8)。
  2. 根据权利要求1所述的一种变频电缆，其特征在于：三根中性线芯间隔设置在三根动力线芯的间隙中。
  3. 根据权利要求1所述的一种变频电缆，其特征在于：三根动力线芯和三根中性线芯绞合成缆芯，缆芯外部设有铜带屏蔽层(8)和护套(7)。
  4. 根据权利要求1所述的一种变频电缆，其特征在于：所述动力线芯绝缘层(2)和中性线芯绝缘层(5)的材料为交联PE，所述动力线芯半导电屏蔽层(3)和中性线芯半导电屏蔽层(6)的材料为EVA，所述护套(7)的材料为塑料。
  5. 根据权利要求1所述的一种变频电缆，其特征在于：所述动力线芯绝缘层(2)和动力线芯半导电屏蔽层(3)同时挤出包覆在动力线芯导体(1)外部，所述中性线芯绝缘层(5)和中性线芯半导电屏蔽层(6)同时挤出包覆在中性线芯导体(4)外部。
PCT/CN2021/134372 2021-06-12 2021-11-30 一种变频电缆 WO2022257376A1 (zh)

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