CN108389653A - 一种铝芯聚氯乙烯绝缘阻燃电力电缆 - Google Patents
一种铝芯聚氯乙烯绝缘阻燃电力电缆 Download PDFInfo
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Abstract
本发明公开了一种铝芯聚氯乙烯绝缘阻燃电力电缆,包括铝导体,在铝导体外先挤包钢带屏蔽层再绕包聚氯乙烯绝缘层,在聚氯乙烯绝缘层外挤包高电性煅烧陶土阻燃层,在高电性煅烧陶土阻燃层外挤包纳米环保防火矿物绝缘层,在纳米环保防火矿物绝缘层外挤包高强度无卤低烟聚烯烃扎带,在高强度无卤低烟聚烯烃扎带外绕包双层改良型玻纤带降温层,在双层改良型玻纤带降温层外设有阻燃瓦楞复合纸板,最后在阻燃瓦楞复合纸板外挤包陶瓷化聚烯烃外护层并涂覆纳米辐射散热降温涂料层。本发明具有屏蔽性好、抗干扰性好、绝缘性好、阻燃耐火性好等优点。
Description
技术领域
本发明涉及电缆领域,具体涉及一种铝芯聚氯乙烯绝缘阻燃电力电缆。
背景技术
随着电力工业的发展,直流电缆以其输送率高,线路损失小;调节电流和改变传送方向方便;安装、维护费用低等特点,越来越多的应用在各领域,用在地铁、核电站、商场、医院、智能大厦等电气设备的安全可靠性要求越来越高,迫切要求开发新一代的环保型直流电缆。
随着火灾事故的频发,人们对电线电缆火灾危险性认识不断加深,有关部门对电线电缆防火阻燃等性能的要求也越来越高。由于电缆火灾具有蔓延快、扑救难、产生二次危害、恢复时间长等特点会给国民经济及人民群众的生命财产带来巨大的损失。因此人们对电线电缆的阻燃、防火特性、安全可靠性提出了更加苛刻的运行条件。如防火、防爆、过载能力强,使用寿命长,在火灾条件下,消防电梯、消防泵需保持一定时间内的正常运行,电缆在燃烧后低烟低卤低毒,甚至无烟无卤无毒等特殊要求。电缆阻燃、防火措施是减少电缆着火延燃的重要手段,关键在以防为主,各类阻燃电缆、耐火电缆、防火电缆得到广泛应用。
国内耐火吊装中压电缆的发展起步较晚,各个厂家的技术设备试验水平参差不齐,加上近年来客户对中压耐火电缆的强烈需求,并对电缆的技术要求越来越高,致使许多厂家由于技术力量有限,不能设计、生产出满足高层建筑技术要求的中压耐火电力电缆产品。
发明内容
发明目的:为了克服现有技术中存在的不足,提供一种结构稳定、紧凑的抗拉强度铝芯聚氯乙烯绝缘阻燃电力电缆。
技术方案:为实现上述目的,本发明提供一种铝芯聚氯乙烯绝缘阻燃电力电缆,包括铝导体,在铝导体外先挤包钢带屏蔽层再绕包聚氯乙烯绝缘层,在聚氯乙烯绝缘层外挤包高电性煅烧陶土阻燃层,在高电性煅烧陶土阻燃层外挤包纳米环保防火矿物绝缘层,在纳米环保防火矿物绝缘层外挤包高强度无卤低烟聚烯烃扎带,在高强度无卤低烟聚烯烃扎带外绕包双层改良型玻纤带降温层,在双层改良型玻纤带降温层外设有阻燃瓦楞复合纸板,最后在阻燃瓦楞复合纸板外挤包陶瓷化聚烯烃外护层并涂覆纳米辐射散热降温涂料层。
进一步地,所述改良型玻纤带降温层为在玻璃纤维带上涂覆有防辐射涂料构成。
进一步地,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。
进一步地,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。
进一步地,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、电缆采用高电性煅烧陶土阻燃层,使得电缆得到了双重的阻燃效果,比普通电缆阻燃性提供了几十倍,还具有最好的补强性能,具有较强的电绝缘性;
2、矿物绝缘层采用纳米环保防火矿物绝缘料构成,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;
3、高强度无卤低烟聚烯烃材料高强度扎带捆绑扎紧,使电缆紧密结合成为一稳定整体结构,大大提高了电缆整体抗拉强度;
4、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。
5、外护层上涂覆有一级防火涂覆层,改变了电缆外表的燃烧特性,阻滞火灾迅速蔓延,减缓火焰传播速度,耐火阻燃性能。
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,本发明提供一种铝芯聚氯乙烯绝缘阻燃电力电缆,包括铝导体1,在铝导体外先挤包钢带屏蔽层2再绕包聚氯乙烯绝缘层3,在聚氯乙烯绝缘层外挤包高电性煅烧陶土阻燃层4,在高电性煅烧陶土阻燃层外挤包纳米环保防火矿物绝缘层5,在纳米环保防火矿物绝缘层外挤包高强度无卤低烟聚烯烃扎带6,在高强度无卤低烟聚烯烃扎带外绕包双层改良型玻纤带降温层7,在双层改良型玻纤带降温层外设有阻燃瓦楞复合纸板8,最后在阻燃瓦楞复合纸板外挤包陶瓷化聚烯烃外护层9并涂覆纳米辐射散热降温涂料层10;所述改良型玻纤带降温层为在玻璃纤维带上涂覆有防辐射涂料构成。
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。
本发明具体应用途径很多,以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以作出若干改进,这些改进也应视为本发明的保护范围。
Claims (5)
1.一种铝芯聚氯乙烯绝缘阻燃电力电缆,其特征在于:包括铝导体,在铝导体外先挤包钢带屏蔽层再绕包聚氯乙烯绝缘层,在聚氯乙烯绝缘层外挤包高电性煅烧陶土阻燃层,在高电性煅烧陶土阻燃层外挤包纳米环保防火矿物绝缘层,在纳米环保防火矿物绝缘层外挤包高强度无卤低烟聚烯烃扎带,在高强度无卤低烟聚烯烃扎带外绕包双层改良型玻纤带降温层,在双层改良型玻纤带降温层外设有阻燃瓦楞复合纸板,最后在阻燃瓦楞复合纸板外挤包陶瓷化聚烯烃外护层并涂覆纳米辐射散热降温涂料层。
2.根据权利要求1所述的铝芯聚氯乙烯绝缘阻燃电力电缆,其特征在于:所述改良型玻纤带降温层为在玻璃纤维带上涂覆有防辐射涂料构成。
3.根据权利要求1所述的铝芯聚氯乙烯绝缘阻燃电力电缆,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。
4.根据权利要求3所述的铝芯聚氯乙烯绝缘阻燃电力电缆,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。
5.根据权利要求3所述的铝芯聚氯乙烯绝缘阻燃电力电缆,其特征在于:所述外部阻燃层为无机阻燃剂。
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CN103227006A (zh) * | 2013-03-26 | 2013-07-31 | 江苏远洋东泽电缆股份有限公司 | 阻燃耐火船用电力电缆及其制造方法 |
CN203456258U (zh) * | 2013-09-27 | 2014-02-26 | 四川风发电气科技有限公司 | 油浸式变压器的主绝缘结构 |
CN204614627U (zh) * | 2015-06-05 | 2015-09-02 | 卧龙电气集团股份有限公司 | 一种AT供电330kV牵引变压器引线容性屏蔽结构 |
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