CN112885507A - 一种防雷防干扰电缆 - Google Patents
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Abstract
本发明涉及电缆技术领域,具体涉及一种防雷防干扰电缆,包括由内而外依次排列的线芯导体、挤包绝缘层、绕包铅层、挤包低密度保护层、绕包金属屏蔽层和挤包半导体外护层,挤包低密度保护层与绕包铅层之间设有绕包铝皮层,线芯导体的外侧包裹有云母带层,云母带层的外侧表面包裹有金属屏蔽膜,金属屏蔽膜的内侧与云母带的外侧之间形成有等间距安装的接地导。
Description
技术领域
本发明涉及电缆技术领域,具体涉及一种防雷防干扰电缆。
背景技术
众所周知,雷电作为自然界一种不可预见的天气现象,在雷击点产生巨大的电流流过,以及不可避免的雷电放电对于电力、通信、建筑等领域都有很大的影响甚至破坏,因而,被击物体或电缆外套极易在雷击过程中损坏;目前,国内电缆行业防雷电缆的设计缺陷与不足,传统电缆线在受雷击时产生很大的雷电波沿线路、金属管道等侵入变电站或建筑物而造成电缆过早损坏。
发明内容
本发明的目的在于针对现有技术中的不足,而提供一种耐雷电冲击的的防雷防干扰电缆。
本发明的目的通过以下技术方案实现:
提供一种防雷防干扰电缆,包括由内而外依次排列的线芯导体、挤包绝缘层、绕包铅层、挤包低密度保护层、绕包金属屏蔽层和挤包半导体外护层,所述挤包低密度保护层与所述绕包铅层之间设有绕包铝皮层,所述线芯导体的外侧包裹有云母带层,所述云母带层的外侧表面包裹有金属屏蔽膜,所述金属屏蔽膜的内侧与所述云母带的外侧之间形成有等间距安装的接地导体,所述绕包金属屏蔽层外侧包裹有阻燃层,所述阻燃层的内侧与所述绕包金属屏蔽层的外侧表面设有等间距的引流线,所述引流线与所述绕包金属屏蔽层电连接,所述接地导体与所述金属屏蔽膜电连接,所述挤包半导体外护层材料为低烟无卤阻燃聚烯烃料。
其中,所述绕包金属屏蔽层为铜带。
其中,所述挤包低密度保护层为低密度聚乙烯。
本发明的有益效果:绕包金属屏蔽层能够很好的阻挡热量的传递,且绕包金属屏蔽层具有形成防雷屏障的作用,同时引流线可以将雷击时穿入绕包金属屏蔽层的大电流导出,在线芯导体上设置有金属屏蔽膜和接地导体,形成第二层保护,接地导体能够将金属屏蔽膜上的大电流接地引出,提高了防雷电缆本体的防雷效果,有效的保护了电缆,提高了电缆的使用寿命。绕包金属屏蔽层绕包铝皮的双重屏蔽的保护下,电缆的抗干扰能力变强,通信保密性也非常好。并且通过设置绕包金属屏蔽层、绕包铅层和绕包铝皮层,能够将电场引起的电位差很好的补偿为等电位。整体的电缆防护层多,耐湿和耐高温性强,不易腐蚀。
附图说明
利用附图对本发明作进一步说明,但附图中的实施例不构成对本发明的任何限制,对于本领域的普通技术人员,在不付出创造性劳动的前提下,还可以根据以下附图获得其它的附图。
图1为本发明的防雷防干扰电缆的结构示意图。
图1中包括:
线芯导体1,云母带层2,接地导体3,金属屏蔽膜4,挤包绝缘层5,绕包铅层6,绕包铝皮层7,挤包低密度保护层8,绕包金属屏蔽层9,引流线10,阻燃层11,挤包半导体外护层12。
具体实施方式
结合以下实施例对本发明作进一步描述。
本发明的一种防雷防干扰电缆的具体实施方式,如图1所示,包括由内而外依次排列的线芯导体1、挤包绝缘层5、绕包铅层6、挤包低密度保护层8、绕包金属屏蔽层9和挤包半导体外护层12,所述挤包低密度保护层8与所述绕包铅层6之间设有绕包铝皮层7。
所述线芯导体1的外侧包裹有云母带层2,所述云母带层2的外侧表面包裹有金属屏蔽膜4,所述金属屏蔽膜4的内侧与所述云母带层2的外侧之间形成有等间距安装的接地导体3。所述绕包金属屏蔽层9外侧包裹有阻燃层11,所述阻燃层11的内侧与所述绕包金属屏蔽层9的外侧表面设有等间距的引流线10,所述引流线10与所述绕包金属屏蔽层9电连接,所述接地导体3与所述金属屏蔽膜4电连接,绕包金属屏蔽层9为铜带,能够很好的阻挡热量的传递,且绕包金属屏蔽层9具有形成防雷屏障的作用,同时引流线10可以将雷击时穿入绕包金属屏蔽层9的大电流导出,在线芯导体1上设置有金属屏蔽膜4和接地导体3,形成第二层保护,接地导体3能够将金属屏蔽膜4上的大电流接地引出,提高了防雷电缆本体的防雷效果,有效的保护了电缆,提高了电缆的使用寿命。绕包金属屏蔽层9绕包铝皮的双重屏蔽的保护下,电缆的抗干扰能力变强,通信保密性也非常好。并且通过设置绕包金属屏蔽层9、绕包铅层6和绕包铝皮层7,能够将电场引起的电位差很好的补偿为等电位。整体的电缆防护层多,耐湿和耐高温性强,不易腐蚀。
所述挤包半导体外护层12材料为低烟无卤阻燃聚烯烃料,本实施例中的挤包半导体外护层12具有良好的导电性,可以将巨大的雷击电流释放到大地。
挤包低密度保护层8为低密度聚乙烯,具有重量轻、性能优良等特点。
最后应当说明的是,以上实施例仅用以说明本发明的技术方案,而非对本发明保护范围的限制,尽管参照较佳实施例对本发明作了详细地说明,本领域的普通技术人员应当理解,可以对本发明的技术方案进行修改或者等同替换,而不脱离本发明技术方案的实质和范围。
Claims (3)
1.一种防雷防干扰电缆,其特征在于:包括由内而外依次排列的线芯导体、挤包绝缘层、绕包铅层、挤包低密度保护层、绕包金属屏蔽层和挤包半导体外护层,所述挤包低密度保护层与所述绕包铅层之间设有绕包铝皮层,所述线芯导体的外侧包裹有云母带层,所述云母带层的外侧表面包裹有金属屏蔽膜,所述金属屏蔽膜的内侧与所述云母带的外侧之间形成有等间距安装的接地导体,所述绕包金属屏蔽层外侧包裹有阻燃层,所述阻燃层的内侧与所述绕包金属屏蔽层的外侧表面设有等间距的引流线,所述引流线与所述绕包金属屏蔽层电连接,所述接地导体与所述金属屏蔽膜电连接,所述挤包半导体外护层材料为低烟无卤阻燃聚烯烃料。
2.根据权利要求1所述的一种防雷防干扰电缆,其特征在于:所述绕包金属屏蔽层为铜带。
3.根据权利要求1所述的一种防雷防干扰电缆,其特征在于:所述挤包低密度保护层为低密度聚乙烯。
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CN202549451U (zh) * | 2012-03-30 | 2012-11-21 | 无锡市远登电缆有限公司 | 变频电缆 |
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