CN106981339A - 一种低烟无卤阻燃中压三芯耐寒电力电缆 - Google Patents
一种低烟无卤阻燃中压三芯耐寒电力电缆 Download PDFInfo
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Abstract
本发明公开了一种低烟无卤阻燃中压三芯耐寒电力电缆,包括三根绝缘线芯,所述的绝缘线芯由导体、依次设置在导体外的由热固型半导体材料制成的导体屏蔽层、由热固型交联聚乙烯材料制成的绝缘层、由热固型半导体材料制成的绝缘屏蔽层以及软铜带屏蔽层构成;所述的三根绝缘线芯绞合成缆芯,在缆芯的空隙处挤压无机水合填充层,在缆芯外设有伴热带,伴热带外设有聚氨酯保温层,在聚氨酯保温层外设有绕包扎紧带,在绕包扎紧带外设有隔离层,在隔离层外设有金属铠装层,最后在金属铠装层外设有外护套,外护套的外表面涂有防火涂料层。本发明具有耐水、耐油、耐盐、阻燃、耐寒、防腐等优点。
Description
技术领域
本发明涉及电缆领域,具体涉及一种低烟无卤阻燃中压三芯耐寒电力电缆。
背景技术
中压交联聚乙烯绝缘电力电缆由压紧铜或铝导体、内屏蔽,绝缘层和外屏蔽及护套组成,其中交联聚乙烯是利用化学方法或者物理方法,使聚乙烯分子由线性结构转变成网状结构,即把热塑性的聚乙烯变为热固性的交联聚乙烯,但是现在市面上的中压交联聚乙烯绝缘塑料护套电力电缆阻燃能力不足;一般均采用聚氯乙烯加阻燃剂的方法制造阻燃性电缆护套,但是这种方法使电缆成本大幅度上升。另外,阻燃剂含有大量的卤元素,高温时会产生大量的卤毒烟雾气,污染环境。
由于阻燃电缆在防止火灾蔓延,提高电气线路安全水平方面具有极其重要的作用,因此,电缆的阻燃化已经成为线缆行业发展的方向。阻燃电缆的品种从最早的聚氯乙烯绝缘及护套阻燃电缆逐渐发展出具有烟雾低、酸气少的低烟阻燃电缆,直至烟雾低、酸气微量的低烟无卤阻燃电缆品种。
低烟无卤阻燃由于受到材料性能的限制,其阻燃性能很难令人满意,一般仅能达到C类阻燃级别。
另外,随着人类探索的足迹遍及全世界,电力的应用也伸向了世界的每一个角落,自然少不了涉足低温高寒的地带。当前,多数的电缆只适用于一个温度范围比较窄的常温环中,在高寒地区,这些电缆会出现硬化、开裂、脆化等严重安全问题,将不再适用于高寒环境中,这对于高寒地区的电力供应将是一个很大的难题。
发明内容
发明目的:为了克服现有技术中存在的不足,提供一种耐水、耐油、耐盐、阻燃的低烟无卤阻燃中压三芯耐寒电力电缆。
技术方案:为实现上述目的,本发明提供一种低烟无卤阻燃中压三芯耐寒电力电缆,其特征在于:包括三根绝缘线芯,所述的绝缘线芯由导体、依次设置在导体外的由热固型半导体材料制成的导体屏蔽层、由热固型交联聚乙烯材料制成的绝缘层、由热固型半导体材料制成的绝缘屏蔽层以及软铜带屏蔽层构成;所述的三根绝缘线芯绞合成缆芯,在缆芯的空隙处挤压无机水合填充层,在缆芯外设有伴热带,伴热带外设有聚氨酯保温层,在聚氨酯保温层外设有绕包扎紧带,在绕包扎紧带外设有隔离层,在隔离层外设有金属铠装层,最后在金属铠装层外设有外护套,外护套的外表面涂有防火涂料层。
进一步地,所述的导体由铝合金丝和铜丝绞合而成。
进一步地,所述的隔离层为氯乙烯材料制成的隔离层。
进一步地,所述的金属铠装层为镀锌钢带铠装层。
进一步地,所述的外护套为无卤低烟阻燃聚烯烃材料制成的护套。
进一步地,所述的防火涂料层是以过氯乙稀树脂和氯化橡胶为基料并添加多种防火添加剂制成。
与现有技术相比,本发明的有益效果在于:
1、本发明设计的线芯结构和电缆结构,既能满足电缆使用的电气和机械性能要求,又能具有良好的阻燃性能。
2、挤压的无机水合填充,遇火时会释放出大量水,并形成烧不透的矿物质填充层,更好的保护了线芯不被燃烧。
3、在电缆外设有伴热带,电缆在户外使用时,只要将伴热带接入电源,就可以持续不断地产生热量,使电缆的绝缘层和护套保持一定的温度,使得电缆不出现硬化、脆化、开裂等现象,依然可自由弯曲、移动使用,提高了电缆的使用寿命。
4、伴热带外设有聚氨酯保温层,很好的提高了伴热带加热时保温的效果,内外双重保护了电缆的耐寒性,使得电缆具有强度高、耐冲击、耐环境老化预应力裂开、耐腐蚀、耐低温、易焊接、施工简便,严格密封无渗漏,还具有容重轻、强度高、绝热、隔音、阻燃、耐寒、防腐、不吸水、施工简便快捷等优异特点,另外,聚氨酯保温材料,适应温度为+120℃—-196℃,使得电缆在冰雪天气因结冰致使通信信号传输中断,造成无法挽救的经济损失。
5、外护层采用无卤低烟阻燃聚烯烃材料作为外护层,在电缆外护层下面做双层钢带重叠绕包,这样可以在燃烧情况下使电缆护层受到的热量得到迅速分散,降低了起火的可能性,同时,这层钢带还可以防止敷设过程中的机械撞击,阻燃等级和抗机械性能大大提高,产品在燃烧时不会产生可见火焰,在燃烧过程中不会产生大量有毒烟雾。因此在火灾发生时对各项系统的启动争夺了时间,保证了人民的人身和财产安全,减少了国家损失。
6、防火涂料是以过氯乙稀树脂和氯化橡胶为基料,添加多种防火添加剂制成,具有良好的隔热阻火性能,附着力强,柔韧性好,并且有耐水、耐油、耐盐等特点,适用于多种型号和电压等级的电缆防火阻燃保护,当涂层遇火时发生膨胀,生成一层均匀致密的蜂窝状隔热层,能有效防止电缆着火延燃和扩大。
附图说明
图1为本发明的结构示意图。
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,本发明提供一种低烟无卤阻燃中压三芯耐寒电力电缆,包括三根绝缘线芯,所述的绝缘线芯由导体1、依次设置在导体外的由热固型半导体材料制成的导体屏蔽层2、由热固型交联聚乙烯材料制成的绝缘层3、由热固型半导体材料制成的绝缘屏蔽层4以及软铜带屏蔽层5构成;所述的三根绝缘线芯绞合成缆芯,在缆芯的空隙处挤压无机水合填充层6,在缆芯外设有伴热带7,伴热带外设有聚氨酯保温层8,在聚氨酯保温层外设有绕包扎紧带9,在绕包扎紧带外设有隔离层10,在隔离层外设有金属铠装层11,最后在金属铠装层外设有外护套12,外护套的外表面涂有防火涂料层13。
为了进一步提高电缆的各项性能,所述的导体1由铝合金丝和铜丝绞合而成,所述的隔离层为氯乙烯材料制成的隔离层,所述的金属铠装层为镀锌钢带铠装层,所述的外护套为无卤低烟阻燃聚烯烃材料制成的护套,所述的防火涂料层是以过氯乙稀树脂和氯化橡胶为基料并添加多种防火添加剂制成。
所述的伴热带7通过电源接孔外接电源,就可以持续不断地产生热量,使电缆的绝缘层和护套保持一定的温度,使得电缆不出现硬化、脆化、开裂等现象,依然可自由弯曲、移动使用,提高了电缆的使用寿命。
以上显示和描述了本发明的基本原理、主要特征和优点。本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明精神和范围的前提下,本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明范围内。
Claims (7)
1.一种低烟无卤阻燃中压三芯耐寒电力电缆,其特征在于:包括三根绝缘线芯,所述的绝缘线芯由导体、依次设置在导体外的由热固型半导体材料制成的导体屏蔽层、由热固型交联聚乙烯材料制成的绝缘层、由热固型半导体材料制成的绝缘屏蔽层以及软铜带屏蔽层构成;所述的三根绝缘线芯绞合成缆芯,在缆芯的空隙处挤压无机水合填充层,在缆芯外设有伴热带,伴热带外设有聚氨酯保温层,在聚氨酯保温层外设有绕包扎紧带,在绕包扎紧带外设有隔离层,在隔离层外设有金属铠装层,最后在金属铠装层外设有外护套,外护套的外表面涂有防火涂料层。
2.根据权利要求1所述的低烟无卤阻燃中压三芯耐寒电力电缆,其特征在于:所述的导体由铝合金丝和铜丝绞合而成。
3.根据权利要求1所述的低烟无卤阻燃中压三芯耐寒电力电缆,其特征在于:所述的隔离层为氯乙烯材料制成的隔离层。
4.根据权利要求1所述的低烟无卤阻燃中压三芯耐寒电力电缆,其特征在于:所述的金属铠装层为镀锌钢带铠装层。
5.根据权利要求1所述的低烟无卤阻燃中压三芯耐寒电力电缆,其特征在于:所述的外护套为无卤低烟阻燃聚烯烃材料制成的护套。
6.根据权利要求1所述的低烟无卤阻燃中压三芯耐寒电力电缆,其特征在于:所述的防火涂料层是以过氯乙稀树脂和氯化橡胶为基料并添加多种防火添加剂制成。
7.根据权利要求1所述的低烟无卤阻燃中压三芯耐寒电力电缆,其特征在于:所述的伴热带外接电源。
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CN108257719A (zh) * | 2018-02-13 | 2018-07-06 | 江苏荣宜电缆有限公司 | 一种风力发电用耐严寒扭曲软电缆 |
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