CN108461208A - 一种高强度绝缘电力电缆 - Google Patents
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Abstract
本发明公开了一种高强度绝缘电力电缆,包括聚乙烯绝缘填芯,所述的绝缘填芯上设有三个紧连在一起的孔槽,每个孔槽内对于设有铝合金导体,在聚乙烯绝缘填芯外绕包扎紧带,在扎紧带外挤包无机隔热防火层,在无机隔热防火层外贴有钛酸钡薄膜,包裹在钛酸钡薄膜表面的表面镀炭的聚酯纤维布,在聚酯纤维布外设有阻燃瓦楞复合纸板,在阻燃瓦楞复合纸板外设有皱纹铝护套。本发明具有低烟、无毒、无卤、阻燃的特性;在承受机械外力时,抗电磁干扰;成本低、性能指标好。
Description
技术领域
本发明涉及电线电缆领域,具体涉及一种高强度绝缘电力电缆。
背景技术
火灾是指在时间和空间上失去控制的燃烧所造成的灾害。在各种灾害中,火灾是最经常、最普遍地威胁公众安全和社会发展的主要灾害之一。
随着社会的不断发展,在社会财富日益增多的同时,导致发生火灾的危险性也在增多,火灾的危害性也越来越大。
为了从无情的火场中挽救更多的生命、财产和信息,防火电缆的应用成为重中之重,而目前市场上的防火电缆按结构特性可以分为刚性和柔性两种。由于刚性矿物绝缘电缆刚性矿物绝缘电缆(Mineral Insulated Cable)简称MI电缆在可靠性、生产及敷设方面的缺陷,在欧美发达国家中逐渐退市,柔性矿物绝缘防火电缆成为防火领域的主流电缆产品。一般电缆金属套采用铜套,工艺较为复杂,效率低,且成本较高,隔离层经常采用受热温度较低的材质,无法形成隔离,使得绝缘材质受热被破会,经常导致电缆短路等现象。
发明内容
为了克服现有技术中存在的不足,提供一种高强度绝缘电力电缆。
为实现上述目的,本发明提供一种高强度绝缘电力电缆,包括聚乙烯绝缘填芯,所述的绝缘填芯上设有三个紧连在一起的孔槽,每个孔槽内对于设有铝合金导体,在聚乙烯绝缘填芯外绕包扎紧带,在扎紧带外挤包无机隔热防火层,在无机隔热防火层外贴有钛酸钡薄膜,包裹在钛酸钡薄膜表面的表面镀炭的聚酯纤维布,在聚酯纤维布外设有阻燃瓦楞复合纸板,在阻燃瓦楞复合纸板外设有皱纹铝护套。
优选地,所述的阻燃瓦楞复合纸板表面和背面由内向外依次设置有第一阻燃真空孔层和外部阻燃层,中部设置有第二阻燃真空孔层。
优选地,所述第一阻燃真空孔层和第二阻燃真空孔层中均设置有若干被抽成真空的孔洞。
优选地,所述外部阻燃层为无机阻燃剂。
与现有技术相比,本发明的有益效果在于:
1、采用绝缘填芯改变了传统的绝缘层结构,既起到固定导体的作用,又起到填充的作用,还有绝缘的作用;
2、通过在聚酯纤维布表面镀有炭,具有良好的电磁波屏蔽效果,并且配合有钛酸钡薄膜具有高的介电常数,当电磁波穿过钛酸钡薄膜时电磁波的速度被减小,有更短的波长,使得电场的强度会有可观的下降;
3、阻燃瓦楞复合纸板通过二层阻燃,从而杜绝瓦楞复合纸板作为纸易发生火灾的隐患,提高了安全性,使得电缆的成本降低,提供了电缆的耐火性能;
4、外护套采用波纹铝护套,不但简化了工艺提高了效率,而且使产品成本大幅下降,通过隔离套采用膨胀耐火层,在火焰侵袭下膨胀层发泡固化,形成厚厚的屏障阻隔了火焰对铝管的直接喷射,不但铝管的完整性得以保存,而且使玻璃纤维带受热温度提高至1100℃以下,使玻璃纤维带绝缘的稳定性得到提高,使得电缆强度高、低密度、耐高温绝缘性好、隔热效果好,还具有一定的屏蔽效果和抗干扰效果;
5、无机隔热防火层,使得电缆从内到外具有防火绝缘性,得到了多重防火保护;在额定电压下能超负荷2.5倍且照常起到绝缘作用;长期工作温度范围是:-40摄氏度到1200摄氏度,照常绝缘;在800—1200摄氏度明火的烧蚀下,1.5小时内不短路,不引发电火,更不会助燃;在明火烧蚀过程中,不仅难燃无焰,而且不再放出窒息有毒气体,具有低烟、无毒、无卤、阻燃的特性;在承受机械外力时,抗电磁干扰;成本低、性能指标好;适合用于各种电线电缆的绝缘层。
附图说明
图1为本发明的结构示意图。
图2为阻燃瓦楞复合纸板的结构示意图。
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,本发明提供一种高强度绝缘电力电缆,包括聚乙烯绝缘填芯1,所述的绝缘填芯上设有三个紧连在一起的孔槽2,每个孔槽内对于设有铝合金导体3,在聚乙烯绝缘填芯外绕包扎紧带4,在扎紧带外挤包无机隔热防火层5,在无机隔热防火层外贴有钛酸钡薄膜6,包裹在钛酸钡薄膜表面的表面镀炭的聚酯纤维布7,在聚酯纤维布外设有阻燃瓦楞复合纸板8,在阻燃瓦楞复合纸板外设有皱纹铝护套9。
如图2所示,所述的阻燃瓦楞复合纸板8表面和背面由内向外依次设置有第一阻燃真空孔层81和外部阻燃层82,中部设置有第二阻燃真空孔层83;所述第一阻燃真空孔层和第二阻燃真空孔层中均设置有若干被抽成真空的孔洞84;所述外部阻燃层为无机阻燃剂。
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)
1.一种高强度绝缘电力电缆,其特征在于:包括聚乙烯绝缘填芯,所述的绝缘填芯上设有三个紧连在一起的孔槽,每个孔槽内对于设有铝合金导体,在聚乙烯绝缘填芯外绕包扎紧带,在扎紧带外挤包无机隔热防火层,在无机隔热防火层外贴有钛酸钡薄膜,包裹在钛酸钡薄膜表面的表面镀炭的聚酯纤维布,在聚酯纤维布外设有阻燃瓦楞复合纸板,在阻燃瓦楞复合纸板外设有皱纹铝护套。
2.根据权利要求1所述的高强度绝缘电力电缆,其特征在于:所述的阻燃瓦楞复合纸板表面和背面由内向外依次设置有第一阻燃真空孔层和外部阻燃层,中部设置有第二阻燃真空孔层。
3.根据权利要求2所述的高强度绝缘电力电缆,其特征在于:所述第一阻燃真空孔层和第二阻燃真空孔层中均设置有若干被抽成真空的孔洞。
4.根据权利要求2所述的高强度绝缘电力电缆,其特征在于:所述外部阻燃层为无机阻燃剂。
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CN203013308U (zh) * | 2012-12-14 | 2013-06-19 | 常州东芝舒电变压器有限公司 | 用于变压器升高座内的电缆 |
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CN105845265A (zh) * | 2016-05-26 | 2016-08-10 | 石策略 | 一种抗干扰电缆 |
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CN208315266U (zh) * | 2018-02-13 | 2019-01-01 | 江苏荣宜电缆有限公司 | 一种高强度绝缘电力电缆 |
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Patent Citations (6)
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CN203013308U (zh) * | 2012-12-14 | 2013-06-19 | 常州东芝舒电变压器有限公司 | 用于变压器升高座内的电缆 |
CN203410128U (zh) * | 2013-03-20 | 2014-01-29 | 江苏天成纸业有限公司 | 一种阻燃瓦楞复合纸板 |
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