CN103700442A - 一种阻水中压铝合金电力电缆 - Google Patents
一种阻水中压铝合金电力电缆 Download PDFInfo
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Abstract
本发明公开了一种阻水中压铝合金电力电缆,该阻水中压铝合金电力电缆包括绝缘线芯、外包层,所述绝缘线芯至少一根,绝缘线芯外包裹外包层构成一种阻水中压铝合金电力电缆;其特征是:所述每根绝缘线芯由内而外包括铝合金导体内芯(1)、内屏蔽层(2)、绝缘层(3)、外屏蔽层(4)、半导电阻水带(5)、无缝金属套(6),所述外包层从内而外分为绕包层(7)、内护层(8)、铠装层(9)及外护层(10)。本发明铝合金电力电缆导体内芯采用铝合金料,铝合金导体内芯屈服强度高、回弹量小、无记忆效用,易于安装,同等质量的本发明与铜芯电缆相比电阻小,且合金材料比铜成本低。
Description
技术领域
本发明属于电线电缆技术领域,具体涉及一种一种阻水中压铝合金电力电缆。
背景技术
电力电缆作为输送电力的载体,在输电线路中占有极为重要的地位。传统中压电缆主要采用铜芯电力电缆,但是铜芯电力电缆成本高,同时铜芯电缆屈服强度低、回弹量高、有记忆效果、重量大等缺点,影响铜芯电缆敷设。国家铜资源日益紧张,濒临匮乏,铝导线效果好,质量轻,价格低廉,以铝代铜已成今后发展趋势。普通铝芯电缆机械性能及蠕变性较差,难以大范围普及,铝合金电缆克服了普通纯铝电缆机械性能及蠕变性能差等缺点,市场前景广阔。现有的铝合金电缆存在一定的问题,如不具备防水阻水功能,容易导致电缆绝缘渗水,电缆结构设计不合理等,所以对铝合金电缆应进一步提升其各种性能来满足市场需求。
发明内容
本发明的目的在于:针对现有铝合金电缆的缺陷,提供一种一种阻水中压铝合金电力电缆,结构合理,质量轻,成本低,机械性能强。
为了实现上述目的,本发明的技术解决方案如下:该一种阻水中压铝合金电力电缆包括绝缘线芯、外包层,所述绝缘线芯至少一根,绝缘线芯外包裹外包层构成一种阻水中压铝合金电力电缆;所述每根绝缘线芯由内而外包括铝合金导体内芯、内屏蔽层、绝缘层、外屏蔽层、半导电阻水带和无缝金属套;其中,所述外包层从内而外分为绕包层、内护层、铠装层及外护层。
其中,铝合金导体内芯采用抗拉强度≥90Mpa、 断裂伸长率≥ 10%、 体积电阻率≤ 0.028264Ω·m/mm2 的铝合金材料,铝合金导体内芯绞合时在铝合金单线中并入有阻水纱。
其中,所述无缝金属套是铝套、铝合金套、铅套或铅合金套,无缝金属套是光套或用以增加电缆的弯曲性能的波纹套。
其中,所述内护层采用高密度聚乙烯材料,所述铠装层是钢带铠装或是钢丝铠装,所述外护层采用聚氯乙烯材料。
其中,所述绝缘线芯大于一根时,绝缘线芯间填充填充层,填充物为阻水绳。
本发明具有以下的有益效果:(1)本发明一种阻水中压铝合金电力电缆,通过在导体中加入阻水纱、绝缘屏蔽外入半导电阻水带、在缆芯中加入阻水绳,使电缆具有优异的纵向阻水性能;(2)本发明绝缘线芯半导电阻水带外设有无缝金属套,既具有接地、屏蔽性能,还具有阻水性能;(3)本发明结构合理,质量轻,成本低,机械性能强,有效地防止电缆渗水,使导体具有阻水功能;(4)绝缘线芯外裹绕包层、内护层及外护层,是为了保护绝缘线芯不受侵蚀,加装铠装层是为了增强机械强度,便于地下直埋或者穿管;(5)绝缘线芯大于一根时,绝缘线芯间填充填充层,填充物为阻水绳,使电缆具有优异的纵向阻水性能。
附图说明
为了使本发明的内容更容易被清楚地理解,下面结合附图,对本发明作进一步详细的说明。
图1为本发明的一种结构示意图。
图2为本发明的另一种结构示意图。
图中:1铝合金导体内芯,2内屏蔽层,3绝缘层,4外屏蔽层,5半导电阻水带,6无缝金属套,7绕包层、8内护层、9铠装层、10外护层、11填充层。
具体实施方式
如图1所示,该一种阻水中压铝合金电力电缆包括绝缘线芯、外包层,所述绝缘线芯至少一根,绝缘线芯外包裹外包层构成一种阻水中压铝合金电力电缆;其特征是:所述每根绝缘线芯由内而外包括铝合金导体内芯1、内屏蔽层2、绝缘层3、外屏蔽层4、半导电阻水带5、无缝金属套6,所述外包层从内而外分为绕包层7、内护层8、铠装层9及外护层10。
其中,铝合金导体内芯1采用抗拉强度≥90Mpa、 断裂伸长率≥ 10%、 体积电阻率≤ 0.028264Ω·m/mm2 的铝合金材料,铝合金导体内芯绞合时在铝合金单线中并入有阻水纱。
其中,所述无缝金属套6是铝套、铝合金套、铅套或铅合金套。
其中,无缝金属套6是光套或用以增加电缆的弯曲性能的波纹套。
其中,所述内护层8采用高密度聚乙烯材料,所述铠装层9是钢带铠装或是钢丝铠装,所述外护层10采用聚氯乙烯材料。
如图2所示,所述绝缘线芯大于一根时,绝缘线芯间填充填充层11,填充物为阻水绳。
Claims (6)
1.一种阻水中压铝合金电力电缆,该一种阻水中压铝合金电力电缆包括绝缘线芯、外包层,所述绝缘线芯至少一根,绝缘线芯外包裹外包层构成一种阻水中压铝合金电力电缆;其特征是:所述每根绝缘线芯由内而外包括铝合金导体内芯(1)、内屏蔽层(2)、绝缘层(3)、外屏蔽层(4)、半导电阻水带(5)、无缝金属套(6),所述外包层从内而外分为绕包层(7)、内护层(8)、铠装层(9)及外护层(10)。
2. 根据权利要求1所述的一种阻水中压铝合金电力电缆,其特征是:铝合金导体内芯(1)采用抗拉强度≥90Mpa、 断裂伸长率≥ 10%、 体积电阻率≤ 0.028264Ω·m/mm2 的铝合金材料,铝合金导体内芯绞合时在铝合金单线中并入有阻水纱。
3. 根据权利要求1所述的一种阻水中压铝合金电力电缆,其特征是:所述无缝金属套(6)是铝套、铝合金套、铅套或铅合金套。
4. 根据权利要求1所述的一种阻水中压铝合金电力电缆,其特征是:无缝金属套(6)是光套或用以增加电缆的弯曲性能的波纹套。
5. 根据权利要求1所述的一种阻水中压铝合金电力电缆,其特征是:所述内护层(8)采用高密度聚乙烯材料,所述铠装层(9)是钢带铠装或是钢丝铠装,所述外护层(10)采用聚氯乙烯材料。
6. 根据权利要求1所述的一种阻水中压铝合金电力电缆,其特征是:所述绝缘线芯大于一根时,绝缘线芯间填充填充层(11),填充物为阻水绳。
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