CN107945918A - 交联聚乙烯绝缘皱纹铝套聚氯乙烯护套纵向阻水阻燃电缆 - Google Patents

交联聚乙烯绝缘皱纹铝套聚氯乙烯护套纵向阻水阻燃电缆 Download PDF

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CN107945918A
CN107945918A CN201711464838.6A CN201711464838A CN107945918A CN 107945918 A CN107945918 A CN 107945918A CN 201711464838 A CN201711464838 A CN 201711464838A CN 107945918 A CN107945918 A CN 107945918A
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王琴
张传省
马壮
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Wuxi Jiangnan Cable Co Ltd
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    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
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    • H—ELECTRICITY
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    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
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    • H01B7/02—Disposition of insulation
    • H01B7/0275—Disposition of insulation comprising one or more extruded layers 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
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; 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
    • H01B7/186—Sheaths comprising longitudinal lapped non-metallic layers
    • H—ELECTRICITY
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    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
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    • 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
    • H01B7/1875—Multi-layer sheaths
    • H—ELECTRICITY
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    • 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
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
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    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • H01B7/2825—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
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    • 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
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Abstract

本发明公开了一种交联聚乙烯绝缘皱纹铝套聚氯乙烯护套纵向阻水阻燃电缆，包括分割导体，在分割导体外先右向绕包半导电尼龙带再在半导电特多龙带外左向绕包PPD带，PPD带外采用三层共挤方式依次挤包半导电内屏蔽层、绝缘层以及半导电外屏蔽层，半导电绝缘屏蔽层外绕包半导电阻水带，半导电阻水带外绕包与半导电阻水带绕包方向相反的半导电缓冲阻水带，在半导电缓冲阻水带外设有皱纹铝护套，皱纹铝护套的外表面涂覆沥青后挤包聚氯乙烯外护套。本发明具有强度高、耐冲击、耐环境老化预应力裂开、耐腐蚀、耐低温、易焊接、施工简便，严格密封无渗漏，还具有容重轻、强度高、绝热、阻燃、阻水、防腐、不吸水、施工简便快捷等优异特点。

Description

交联聚乙烯绝缘皱纹铝套聚氯乙烯护套纵向阻水阻燃电缆
技术领域
本发明涉及电缆导体领域，具体是一种交联聚乙烯绝缘皱纹铝套聚氯乙烯护套纵向阻水阻燃电缆。
背景技术
随着火灾事故的频发，人们对电线电缆火灾危险性认识不断加深，有关部门对电线电缆防火阻燃等性能的要求也越来越高。由于电缆火灾具有蔓延快、扑救难、产生二次危害、恢复时间长等特点会给国民经济及人民群众的生命财产带来巨大的损失。因此人们对电线电缆的阻燃、防火特性、安全可靠性提出了更加苛刻的运行条件。如防火、防爆、过载能力强,使用寿命长，在火灾条件下，消防电梯、消防泵需保持一定时间内的正常运行，电缆在燃烧后低烟低卤低毒,甚至无烟无卤无毒等特殊要求。电缆阻燃、防火措施是减少电缆着火延燃的重要手段，关键在以防为主，各类阻燃电缆、耐火电缆、防火电缆得到广泛应用。
任何物质发生燃烧都必须具备以下三个条件：可燃物、氧化剂和温度（引火源）。空气中含有的氧气是一种氧化剂，因此，在电缆结构设计中，减少电缆之间间隙以此来减少空气的存在是一种常用的方法，因此，现有技术常采用在电缆填充中设置玻璃纤维绳、玻璃纤维带、云母带、石棉绳等阻燃或者耐火材料的方法，能提高电缆的阻燃、耐火性能。为了减少线芯之间的间隙，现有技术中也常常使用扇形导体，挤包绝缘形成扇形线芯后成缆，可以使线芯之间间隙降到最小，但与护层之间的间隙仍然存在。尤其是扇形导体的加工在生产过程中存在很多难题和弊端：一是工艺难度大，为了满足扇形导体足够的可曲性和稳定性，对导体结构的设计、工装模具、设备的特性要求均较高；二是为防止水分渗入要求导体必须采用紧压导体，以提高导线的填充系数，缩小外径，减少导体间间隙，而扇形导体是扇形紧压，每层的形状不同，紧压的难度增加；三是扇形导体的各个角加工过程中容易引起电场集中和损伤电缆绝缘层。
发明内容
本发明为了解决现有技术中存在的问题，提供了一种交联聚乙烯绝缘皱纹铝套聚氯乙烯护套纵向阻水阻燃电缆。
本发明所述的一种交联聚乙烯绝缘皱纹铝套聚氯乙烯护套纵向阻水阻燃电缆，其特征在于：包括分割铜股块组合而成的分割铜导体，在每个分割铜导体外先右向绕包分割半导电特多龙带再在分割半导电特多龙带整体外左向绕包PPD带，PPD带外采用三层共挤方式依次挤包半导电内屏蔽层、绝缘层以及半导电外屏蔽层，半导电绝缘屏蔽层外绕包半导电阻水带，半导电阻水带外绕包与半导电阻水带绕包方向相反的半导电缓冲阻水带，在半导电缓冲阻水带外设有皱纹铝护套，皱纹铝护套的内径与半导电缓冲阻水带的外径相同;皱纹铝护套的外表面涂覆沥青后挤包聚氯乙烯外护套。
进一步改进，所述的半导电内屏蔽层与半导电外屏蔽层采用超净半导电屏蔽料制成，能够有效导出电流，还具有超光滑表面特性，其性能稳定，能起到良好的均匀电场的作用，防止半导电屏蔽层由于表面缺陷可能引起严重的电场集中，导致局部放电或绝缘击穿的问题，抑制电缆绝缘材料中的空间电荷积聚并且降低其电导率；
进一步改进，所述的绝缘层采用超净交联聚乙烯绝缘料。
与现有技术相比，本发明的有益效果在于：
1、在每个分割铜导体外先右向绕包分割半导电特多龙带再在分割半导电特多龙带整体外左向绕包PPD带，使得导体之间没有间隙，使得电缆的阻水性能更好；
2、半导电特多龙带不仅起到绑扎的作用，还起到隔离、屏蔽作用，还具有极高的抗拉强度，很好的耐渗透性及高耐温性，具有长期稳定性；
3、再在每个半导电特多龙带外整体绕包PPD带，使得导体之间没有间隙，使得电缆的抗拉强度好，长度长，在成缆铠装工序中可降低停机次数和断带次数，可降低生产成本和操作工的工作强度；PPD聚丙烯绕包带比PVC绕包带容易储存，价格便宜，节约生产成本，同时还提高生产效率；
4、在半导电绝缘屏蔽层外再次方向相反的绕包两层阻水层，很好的保护了缆芯的阻水性能，半导电阻水带半导电无纺布带是由聚酯无纺布纤维双面涂覆均匀电特性的半导电化合物而成，具有很强的阻水性能；半导电缓冲阻水带由聚酯无纺布纤维双面涂覆均匀电特性的半导电化合物而成，且具有很好的垫衬性能、缓冲性能以及阻水性能；
5、皱纹铝护套采用氩弧焊接技术焊接最高为700℃（焊接点），由于氩气和氦气不断吹向焊接点，使散热迅速，避免了绝缘线芯烫伤（实测证明焊接点处缓冲层表面温度为60℃，缆线芯外屏蔽表面为33℃）；而且氩气和氦气属惰性气体从而保护焊接点处铝不被氧化，确保了铝护套焊接处与整体电阻率和机械强度的一致性；可任意调节铝护套与绝缘屏蔽的间隙，使绝缘屏蔽、半导电缓冲层、铝护套三者紧密接触，避免了因接触不良的容性充电电容而造成的电晕放电。
附图说明
图1为本发明的结构示意图。
具体实施方式
下面结合附图对本发明作进一步说明。
如图1所示的一种交联聚乙烯绝缘皱纹铝套聚氯乙烯护套纵向阻水阻燃电缆，包括分割铜股块1组合而成的分割铜导体，在每个分割铜导体外先右向绕包分割半导电特多龙带2再在分割半导电特多龙带整体外左向绕包PPD带3，PPD带外采用三层共挤方式依次挤包半导电内屏蔽层4、绝缘层5以及半导电外屏蔽层6，半导电绝缘屏蔽层外绕包半导电阻水带7，半导电阻水带外绕包与半导电阻水带绕包方向相反的半导电缓冲阻水带8，在半导电缓冲阻水带外设有皱纹铝护套9，皱纹铝护套的内径与半导电缓冲阻水带的外径相同;皱纹铝护套的外表面涂覆沥青后挤包聚氯乙烯外护套10。
所述的半导电内屏蔽层与半导电外屏蔽层采用超净半导电屏蔽料制成，能够有效导出电流，还具有超光滑表面特性，其性能稳定，能起到良好的均匀电场的作用，防止半导电屏蔽层由于表面缺陷可能引起严重的电场集中，导致局部放电或绝缘击穿的问题，抑制电缆绝缘材料中的空间电荷积聚并且降低其电导率；
所述的绝缘层采用超净交联聚乙烯绝缘料，有其独特的绝缘特性、优良的力学性能、耐热性。
半导电阻水带半导电无纺布带是由聚酯无纺布纤维双面涂覆均匀电特性的半导电化合物而成，具有很强的阻水性能；半导电缓冲阻水带由聚酯无纺布纤维双面涂覆均匀电特性的半导电化合物而成，且具有很好的垫衬性能、缓冲性能以及阻水性能。
本发明具体应用途径很多，以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以作出若干改进，这些改进也应视为本发明的保护范围。

Claims (3)

1.一种交联聚乙烯绝缘皱纹铝套聚氯乙烯护套纵向阻水阻燃电缆，其特征在于：包括分割铜股块组合而成的分割铜导体，在每个分割铜导体外先右向绕包分割半导电特多龙带再在分割半导电特多龙带整体外左向绕包PPD带，PPD带外采用三层共挤方式依次挤包半导电内屏蔽层、绝缘层以及半导电外屏蔽层，半导电绝缘屏蔽层外绕包半导电阻水带，半导电阻水带外绕包与半导电阻水带绕包方向相反的半导电缓冲阻水带，在半导电缓冲阻水带外设有皱纹铝护套，皱纹铝护套的内径与半导电缓冲阻水带的外径相同;皱纹铝护套的外表面涂覆沥青后挤包聚氯乙烯外护套。
2.根据权利要求1所述的交联聚乙烯绝缘皱纹铝套聚氯乙烯护套纵向阻水阻燃电缆，其特征在于：所述的半导电内屏蔽层与半导电外屏蔽层采用超净半导电屏蔽料制成。
3.根据权利要求1所述的交联聚乙烯绝缘皱纹铝套聚氯乙烯护套纵向阻水阻燃电缆，其特征在于：所述的绝缘层采用超净交联聚乙烯绝缘料。
CN201711464838.6A 2017-12-28 2017-12-28 交联聚乙烯绝缘皱纹铝套聚氯乙烯护套纵向阻水阻燃电缆 Withdrawn CN107945918A (zh)

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CN205789312U (zh) * 2016-07-07 2016-12-07 远东电缆有限公司 智慧能源用hccv超高压交联聚乙烯绝缘电力电缆
CN107154285A (zh) * 2017-03-29 2017-09-12 江苏上上电缆集团有限公司 一种高电能传输装备用电缆的制造方法及电缆
CN208225542U (zh) * 2017-12-28 2018-12-11 无锡江南电缆有限公司 交联聚乙烯绝缘皱纹铝套聚氯乙烯护套纵向阻水阻燃电缆

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