CN110890175A - 一种皱纹铝套径向阻水低压电力电缆 - Google Patents

一种皱纹铝套径向阻水低压电力电缆 Download PDF

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CN110890175A
CN110890175A CN201910983483.4A CN201910983483A CN110890175A CN 110890175 A CN110890175 A CN 110890175A CN 201910983483 A CN201910983483 A CN 201910983483A CN 110890175 A CN110890175 A CN 110890175A
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余静成
黄晓军
张宇航
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Anhui Shangwei Cable Co Ltd
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Abstract

本发明涉及低压电力电缆技术领域,具体涉及一种皱纹铝套径向阻水低压电力电缆,包括数根导体,导体的外侧设置有半导电屏蔽层,半导电屏蔽层的外侧设置有绝缘层,数根导体的外侧绕包有成缆绕包层,成缆绕包层的外侧设置有径向阻水带,径向阻水带的外侧挤制有PE内护套层;PE内护套层外侧焊接有皱纹铝护套层;皱纹铝护套层的外侧涂抹有防腐沥青层,防腐沥青层的外侧设置有抗侧压力层,抗侧压力层的内部设置有多个空腔;空腔的内部填充有弹性金属丝;抗侧压力层外侧设置有外护套层;本发明提供了一种皱纹铝套径向阻水低压电力电缆,结构柔软,具备屏蔽电缆短路电流、径向防水以及承受抗侧压力的作用。

Description

一种皱纹铝套径向阻水低压电力电缆
技术领域
本发明涉及低压电力电缆技术领域,具体涉及一种皱纹铝套径向阻水低压电力电缆。
背景技术
电力电缆是用于传输和分配电能的电缆,电力电缆常用于城市地下电网、发电站引出线路、工矿企业内部供电及过江海水下输电线;在电力线路中,电缆所占比重正逐渐增加,电力电缆是在电力系统的主干线路中用以传输和分配大功率电能的电缆产品。
现有的低压电力电缆中,由于导体在绞制时,表面难免会有凹凸;凸起部分的电位较高,容易造成局部放电,且电缆的径向防水功能也一般;另一方面,由于低压电力电缆较高压电缆相比较,结构较为简单,电缆的抗侧压力性能低。
发明内容
为解决上述背景技术中提出的问题,本发明提供了一种皱纹铝套径向阻水低压电力电缆,结构柔软,具备屏蔽电缆感应电流、径向防水以及承受抗侧压力的作用。
为实现上述目的,本发明提供如下技术方案:一种皱纹铝套径向阻水低压电力电缆,包括数根导体,导体由退火铜丝制成;导体的外侧设置有半导电屏蔽层,半导电屏蔽层的外侧设置有绝缘层,数根导体的外侧绕包有成缆绕包层,成缆绕包层的外侧设置有径向阻水带,径向阻水带的外侧挤制有PE内护套层;PE内护套层外侧焊接有皱纹铝护套层;皱纹铝护套层的外侧涂抹有防腐沥青层,防腐沥青层的外侧设置有抗侧压力层,抗侧压力层采用弹性橡胶制成;抗侧压力层的内部设置有多个空腔;空腔的内部填充有弹性金属丝;抗侧压力层外侧设置有外护套层,外护套层采用嵌有凯夫拉纤维的聚氨酯制成。
进一步的,半导电屏蔽层采用EVA和导电炭黑混合制成,所述EVA和所述导电炭黑的质量比为1:1。
进一步的,绝缘层采用交联聚乙烯材料制成。
进一步的,径向阻水带包括尼龙基布以及粘合在所述尼龙基布上的吸水树脂组成。
进一步的,皱纹铝护套层采用经过压延的厚度均匀的铝板氩弧焊焊接制成。
进一步的,多个空腔在所述抗侧压力层的圆周方向上均匀分布。
进一步的,成缆绕包层采用阻水无纺布制成。
与现有技术相比,本发明的有益效果是:
1、导体的外侧设置有半导电屏蔽层,半导电屏蔽层与导体紧密接触,可以均匀导体的外表面电场,避免因导体表面不光滑以及绞合产生的气隙而造成导体和绝缘层发生局部放电;成缆绕包层的外侧设置有径向阻水带,径向阻水带的外侧挤制有PE内护套层;通过在PE内护套层内设置径向阻水带其水密封高于单一的PE内护套层数百倍。
2、PE内护套层外侧焊接有皱纹铝护套层,皱纹铝护套有着承受电缆短路电流、径向防水以及承受抗侧压力的作用。
3、防腐沥青层的外侧设置有抗侧压力层,抗侧压力层采用弹性橡胶制成;抗侧压力层的内部设置有多个空腔;空腔的内部填充有弹性金属丝;弹性橡胶可以吸收部分侧压力,提高电缆的抗侧压能力;弹性金属丝在具备吸收侧压力的同时,可以提升抗侧压力层整体的机械强度,防止变形过度;抗侧压力层外侧设置有外护套层,外护套层采用嵌有凯夫拉纤维的聚氨酯制成;凯夫拉纤维化学名为聚对苯二甲酰对苯二胺,这种新型材料密度低、强度高、韧性好、耐高温、易于加工和成型,其强度为同等质量钢铁的5倍,但密度仅为钢铁的五分之一,增强电缆的抗扭曲柔韧性能。
附图说明
附图用来提供对本发明的进一步理解,并且构成说明书的一部分,与本发明的实施例一起用于解释本发明,并不构成对本发明的限制。在附图中:
图1为本发明实施例的结构示意图。
图中:1、导体;2、半导电屏蔽层;3、绝缘层;4、成缆绕包层;5、径向阻水带;6、PE内护套层;7、皱纹铝护套层;8、防腐沥青层;9、抗侧压力层;901、空腔;902、弹性金属丝;10、外护套层。
具体实施方式
为了使本发明的目的、技术方案进行清楚、完整地描述,及优点更加清楚明白,以下结合附图对本发明实施例进行进一步详细说明。应当理解,此处所描述的具体实施例是本发明一部分实施例,而不是全部的实施例,仅仅用以解释本发明实施例,并不用于限定本发明实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
在本发明的描述中,需要说明的是,术语“中心”、“中”“上”、“下”、“左”、“右”、“内”、“外”、“顶”、“底”、“侧”、“竖直”、“水平”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。此外,术语“一”、“第一”、“第二”、“第三”、“第四”、“第五”、“第六”仅用于描述目的,而不能理解为指示或暗示相对重要性。
在本发明的描述中,需要说明的是,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以具体情况理解上述术语在本发明中的具体含义。
出于简明和说明的目的,实施例的原理主要通过参考例子来描述。在以下描述中,很多具体细节被提出用以提供对实施例的彻底理解。然而明显的是,对于本领域普通技术人员,这些实施例在实践中可以不限于这些具体细节。在一些实例中,没有详细地描述公知方法和结构,以避免无必要地使这些实施例变得难以理解。另外,所有实施例可以互相结合使用。
请参阅图1,本发明提供以下技术方案:一种皱纹铝套径向阻水低压电力电缆,包括数根导体1,导体1由数根退火铜丝绞制而成;导体1的外侧设置有半导电屏蔽层2,半导电屏蔽层2的外侧设置有绝缘层3,数根导体1的外侧绕包有成缆绕包层4,成缆绕包层4的外侧设置有径向阻水带5,径向阻水带5的外侧挤制有PE内护套层6;PE内护套层6外侧焊接有皱纹铝护套层7;皱纹铝护套层7的外侧涂抹有防腐沥青层8,防腐沥青层8可以防止皱纹铝护套层7发生氧化反应;防腐沥青层8的外侧设置有抗侧压力层9,抗侧压力层9采用弹性橡胶制成;抗侧压力层9的内部设置有多个空腔901;空腔901的内部填充有弹性金属丝902;抗侧压力层9可以采用注塑成型方式生产也可以采用其他途径,抗侧压力层9的外侧挤包有外护套层10,外护套层10采用嵌有凯夫拉纤维的聚氨酯制成。根据以上实施例,半导电屏蔽层2与导体1紧密接触,可以均匀导体1的外表面电场,避免因导体1表面不光滑以及绞合产生的气隙而造成导体1和绝缘层3发生局部放电;通过在PE内护套层6内设置径向阻水带5其水密封高于单一的PE内护套层6数百倍;皱纹铝护套层7有着承受电缆短路电流、径向防水以及承受抗侧压力的作用;当电缆受侧压力时,弹性橡胶制成的抗侧压力层9内部的空腔901可以发生形变吸收部分冲击力,空腔901的内部填充的弹性金属丝902在具备吸收侧压力的同时,可以提升抗侧压力层9整体的机械强度,防止变形过度;弹性金属丝902可以采用铜丝或者铝丝;外护套层10采用嵌有凯夫拉纤维的聚氨酯制成;凯夫拉纤维化学名为聚对苯二甲酰对苯二胺,这种新型材料密度低、强度高、韧性好、耐高温、易于加工和成型,其强度为同等质量钢铁的5倍,但密度仅为钢铁的五分之一,增强电缆的抗扭曲柔韧性能。
为保证半导电屏蔽层2具备良好的屏蔽电流的能力;根据以上实施例,具体的,请参阅图1,半导电屏蔽层2采用EVA和导电炭黑混合制成,EVA和导电炭黑的质量比为1:1。
为使绝缘层3具备良好的绝缘性能,且具备低烟无卤特性,根据以上实施例,具体的,请参阅图1,绝缘层3采用交联聚乙烯材料制成。
为使径向阻水带5在具备吸水性能的同时,也具备一定强度,防止变形,采用具有一定强度的尼龙基布;根据以上实施例,具体的,请参阅图1,径向阻水带5包括尼龙基布以及粘合在所述尼龙基布上的吸水树脂组成。
为使皱纹铝护套层7具备良好的径向阻水能力,皱纹铝护套层7采取氩弧焊焊接而成,一般电力电缆采用的挤包铝护套是采用挤出工艺,若控制不当容易造成铝护套厚度不均,容易产生微孔、砂眼等现象,这就使铝护套强度极为不均,降低铝护套的径向防水性能,根据以上实施例,具体的,请参阅图1,皱纹铝护套层7采用经过压延的厚度均匀的铝板氩弧焊焊接制成。
为使抗侧压力层9在各个方向均可吸收侧压力,根据以上实施例,具体的,请参阅图1,多个空腔901在抗侧压力层9的圆周方向上均匀分布。
为使成缆绕包层4也具备一定的阻水能力,根据以上实施例,具体的,请参阅图1,成缆绕包层4采用阻水无纺布制成,阻水无纺布属于现有技术,再次不再赘述。
最后应说明的是:以上所述仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (7)

1.一种皱纹铝套径向阻水低压电力电缆,包括数根导体(1),其特征在于:所述导体(1)由退火铜丝制成;所述导体(1)的外侧设置有半导电屏蔽层(2),所述半导电屏蔽层(2)的外侧设置有绝缘层(3),数根所述导体(1)的外侧绕包有成缆绕包层(4),所述成缆绕包层(4)的外侧设置有径向阻水带(5),所述径向阻水带(5)的外侧挤制有PE内护套层(6);所述PE内护套层(6)外侧焊接有皱纹铝护套层(7);所述皱纹铝护套层(7)的外侧涂抹有防腐沥青层(8),所述防腐沥青层(8)的外侧设置有抗侧压力层(9),所述抗侧压力层(9)采用弹性橡胶制成;所述抗侧压力层(9)的内部设置有多个空腔(901);所述空腔(901)的内部填充有弹性金属丝(902);所述抗侧压力层(9)外侧设置有外护套层(10),所述外护套层(10)采用嵌有凯夫拉纤维的聚氨酯制成。
2.根据权利要求1所述的一种皱纹铝套径向阻水低压电力电缆,其特征在于:所述半导电屏蔽层(2)采用EVA和导电炭黑混合制成,所述EVA和所述导电炭黑的质量比为1:1。
3.根据权利要求1所述的一种皱纹铝套径向阻水低压电力电缆,其特征在于:所述绝缘层(3)采用交联聚乙烯材料制成。
4.根据权利要求1所述的一种皱纹铝套径向阻水低压电力电缆,其特征在于:所述径向阻水带(5)包括尼龙基布以及粘合在所述尼龙基布上的吸水树脂组成。
5.根据权利要求1所述的一种皱纹铝套径向阻水低压电力电缆,其特征在于:所述皱纹铝护套层(7)采用经过压延的厚度均匀的铝板氩弧焊焊接制成。
6.根据权利要求1所述的一种皱纹铝套径向阻水低压电力电缆,其特征在于:多个所述空腔(901)在所述抗侧压力层(9)的圆周方向上均匀分布。
7.根据权利要求1所述的一种皱纹铝套径向阻水低压电力电缆,其特征在于:所述成缆绕包层(4)采用阻水无纺布制成。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114940784A (zh) * 2022-03-16 2022-08-26 重庆大学 一种阻水性电缆半导电屏蔽层材料及其制备方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114940784A (zh) * 2022-03-16 2022-08-26 重庆大学 一种阻水性电缆半导电屏蔽层材料及其制备方法

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