CN108550421A - 一种交联聚乙烯绝缘聚氯乙烯护套径向阻水电力电缆 - Google Patents
一种交联聚乙烯绝缘聚氯乙烯护套径向阻水电力电缆 Download PDFInfo
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Abstract
本发明公开了一种交联聚乙烯绝缘聚氯乙烯护套径向阻水电力电缆,包括缆芯,所述的缆芯由多根绝缘线芯绞合而成,在缆芯的空隙处填充玻璃阻水纱;在缆芯外绕包扎紧带,在扎紧带外设有径向防水层,在径向防水层外设有聚氯乙烯内护套,在聚氯乙烯内护套外编织钢带铠装层,在钢带铠装层外挤包热塑性弹性体防水层,在热塑性弹性体防水层外挤包聚氯乙烯外护套。本发明具有良好的粘结性、塑性、抗水性、防腐性和耐久性等特点。
Description
技术领域
本发明涉及电线电缆领域,具体涉及一种交联聚乙烯绝缘聚氯乙烯护套径向阻水电力电缆。
背景技术
我国海上有丰富的风能资源和广阔平坦的区域,而且距离电力负荷中心很近,使得近海风力发电技术成为近来研究和应用的热点。由于海底自然环境恶劣及其不可预见性,海上风电用海底电缆是设计技术、制造技术难度较大的电缆品种。浅海电缆不仅要求防水、耐腐蚀、抗机械牵拉及外力碰撞等特殊性能,还要求较高的电气绝缘性能和很高的安全可靠性,特别是大长度海缆更是对目前电缆行业的制造能力和技术水平提出了极大挑战。浅海用电缆广泛应用于大陆与岛屿、岛屿与岛屿之间以及穿越江河湖底的电力传输。随着自动化及我国海洋事业的快速发展,未来的数十年内,无论是海上风力发电,还是其他近海作业系统,都将对浅海电缆呈现出巨大的需求。由于浅海海底应用的特殊环境,需要电缆具有不同的导电截面、不同的机械强度、防海水渗漏与腐蚀等结构特性,并采用适应潮间带、潮下带等不同的施工方法,以满足风电产业的特殊需求。
发明内容
为了克服现有技术中存在的不足,提供一种交联聚乙烯绝缘聚氯乙烯护套径向阻水电力电缆。
为实现上述目的,本发明提供一种交联聚乙烯绝缘聚氯乙烯护套径向阻水电力电缆,包括缆芯,所述的缆芯由多根绝缘线芯绞合而成,在缆芯的空隙处填充玻璃阻水纱;在缆芯外绕包扎紧带,在扎紧带外设有径向防水层,在径向防水层外设有聚氯乙烯内护套,在聚氯乙烯内护套外编织钢带铠装层,在钢带铠装层外挤包热塑性弹性体防水层,在热塑性弹性体防水层外挤包聚氯乙烯外护套。
优选地,所述的绝缘线芯由铝合金导体、设置在铝合金导体外的阻水粉层、挤包在阻水粉层外的硅橡胶绝缘层以及设置在硅橡胶绝缘层外的聚氨酯防水薄膜构成。
优选地,所述径向防水层是由铝塑复合带纵包粘结后与热塑性内护材料粘结形成。
优选地,所述热塑性弹性体防水层的下表面设有 EVA 防水层,所述热塑性弹性体防水层的上表面和 EVA 防水层的下表面分别设有无菌热轧丙纶层。
与现有技术相比,本发明的有益效果在于:
1、本发明采用了多层阻水材料,使得电缆具有很强的阻水功能,不会因为水分浸入造成导体的氧化、腐蚀,从而影响电缆的电性能,甚至发生异常断线事故。
2、所述径向防水层是由铝塑复合带纵包粘结后与热塑性内护材料粘结形成,这样,通过由上述材料构成的径向防水层可以非常有效地挡住水分从电缆径向渗入到绝缘线芯内,从而大大地提高了径向防水层的防水性。
3、绝缘线芯的导体外涂有阻水粉以及在外层外绕包聚氨酯防水薄膜,使得绝缘线芯具有抗拉强度高,弹性和延伸率大,粘结性、抗水性和耐气候性好等特点,可以冷用,使用年限较长,阻水粉具有高吸水性,能吸收自身重量的数百倍或上千倍的无离子水;高膨胀性,吸水后的高吸水树脂凝胶体体积随即膨胀数百倍。
4、该电缆内外结合设计多层防水层,使得电缆的防水性能是现有技术中防水电缆的几百倍,具有超强的防水性能,目前市场上几乎都达不到本电缆的防水性。
附图说明
图1为本发明的结构示意图;
图2为本发明防水膜的结构示意图。
具体实施方式
下面结合附图和具体实施例,进一步阐明本发明,应理解这些实施例仅用于说明本发明而不用于限制本发明的范围,在阅读了本发明之后,本领域技术人员对本发明的各种等价形式的修改均落于本申请所附权利要求所限定的范围。
如图1所示,本发明提供一种交联聚乙烯绝缘聚氯乙烯护套径向阻水电力电缆,包括缆芯,所述的缆芯由多根绝缘线芯绞合而成,所述的绝缘线芯由铝合金导体1、设置在铝合金导体外的阻水粉层2、挤包在阻水粉层外的硅橡胶绝缘层3以及设置在硅橡胶绝缘层外的聚氨酯防水薄膜4构成;导体外涂有阻水粉以及在外层外绕包聚氨酯防水薄膜,使得绝缘线芯具有抗拉强度高,弹性和延伸率大,粘结性、抗水性和耐气候性好等特点,可以冷用,使用年限较长,阻水粉具有高吸水性,能吸收自身重量的数百倍或上千倍的无离子水;高膨胀性,吸水后的高吸水树脂凝胶体体积随即膨胀数百倍。
然后,在缆芯的空隙处填充玻璃阻水纱5;在缆芯外绕包扎紧带6,在扎紧带外设有径向防水层7,在径向防水层外设有聚氯乙烯内护套8,在聚氯乙烯内护套外编织钢带铠装层9,在钢带铠装层外挤包聚氯乙烯外护套10,在聚氯乙烯外护套外表面贴合防水膜11;该电缆内外结合设计多层防水层,使得电缆的防水性能是现有技术中防水电缆的几百倍,具有超强的防水性能,目前市场上几乎都达不到本电缆的防水性。
所述径向防水层是由铝塑复合带纵包粘结后与热塑性内护材料粘结形成,这样,通过由上述材料构成的径向防水层可以非常有效地挡住水分从电缆径向渗入到绝缘线芯内,从而大大地提高了径向防水层的防水性。
如图2所示,所述的防水膜11包括热塑性弹性体防水层12,所述热塑性弹性体防水层的下表面设有 EVA 防水层13,所述热塑性弹性体防水层的上表面和 EVA 防水层的下表面分别设有无菌热轧丙纶层14,热塑性弹性体防水层是由热塑性弹性体制作的,热塑性弹性体又称人造橡胶或合成橡胶,其具有环保、无毒的特点,还有传统交联硫化橡胶的 高弹性、耐老化、耐油性等各项优异性能;EVA 即乙烯 - 醋酸乙烯共聚物,具有良好的耐水性、耐腐蚀性、保温性和隔音性,防寒及低温性能优异,且易于进行热压、剪裁、涂胶、贴合等 加工;无菌热轧丙纶层是由丙纶混合了无菌颗粒后经热轧成型,无菌热轧丙纶具有一定的抗菌能力,能够在长期潮湿的环境中保持抗菌特性,能够抑制细菌和真菌在电缆的外表面生长,可以保证电缆外表面的干净。
以上所述仅是本发明的优选实施方式,应当指出,对于本领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干变型和改进,这些也应视为属于本发明的保护范围。
Claims (4)
1.一种交联聚乙烯绝缘聚氯乙烯护套径向阻水电力电缆,包括缆芯,所述的缆芯由多根绝缘线芯绞合而成,其特征在于:在缆芯的空隙处填充玻璃阻水纱;在缆芯外绕包扎紧带,在扎紧带外设有径向防水层,在径向防水层外设有聚氯乙烯内护套,在聚氯乙烯内护套外编织钢带铠装层,在钢带铠装层外挤包聚氯乙烯外护套,在聚氯乙烯外护套外表面贴合防水膜。
2.根据权利要求1所述的交联聚乙烯绝缘聚氯乙烯护套径向阻水电力电缆,其特征在于:所述的绝缘线芯由铝合金导体、设置在铝合金导体外的阻水粉层、挤包在阻水粉层外的硅橡胶绝缘层以及设置在硅橡胶绝缘层外的聚氨酯防水薄膜构成。
3.根据权利要求1所述的交联聚乙烯绝缘聚氯乙烯护套径向阻水电力电缆,其特征在于:所述径向防水层是由铝塑复合带纵包粘结后与热塑性内护材料粘结形成。
4.根据权利要求1所述的交联聚乙烯绝缘聚氯乙烯护套径向阻水电力电缆,其特征在于:所述的防水膜包括热塑性弹性体防水层,所述热塑性弹性体防水层的下表面设有 EVA防水层,所述热塑性弹性体防水层的上表面和 EVA 防水层的下表面分别设有无菌热轧丙纶层。
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Cited By (2)
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CN110867277A (zh) * | 2019-11-28 | 2020-03-06 | 人民电缆集团有限公司 | 环保抗拉耐磨架空绝缘电缆及四芯结构架空绝缘电缆 |
US11569003B2 (en) * | 2019-03-07 | 2023-01-31 | Hitachi Metals, Ltd. | Composite cable and composite harness |
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