CN205595109U - 耐辐射耐水解电缆 - Google Patents
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Abstract
本实用新型公开了一种耐辐射耐水解电缆，包括铜线芯、绕包层和聚醚醚酮绝缘层，多条包覆有聚酰亚胺漆的铜丝绞合形成所述铜线芯，所述绕包层包覆于多条所述铜线芯外，所述聚醚醚酮绝缘层包覆于所述绕包层外。本实用新型采用220级聚酰亚胺漆包铜线芯，具有优良的机械性能、良好的热稳定性、较高的耐辐射性能和良好的介电性能；采用聚醚醚酮作为绝缘护套层，耐热性、耐辐射性、耐水解性、电气绝缘性优异，氧指数也较高，燃烧时发烟量少且无毒；本电缆能长期使用于水蒸气多、环境温度高、辐射剂量强的地方。
Description
技术领域
本实用新型涉及一种电缆。尤其涉及一种耐辐射耐水解电缆。
背景技术
由于核电站的特殊性，其中所使用的电缆要求比较高，包括电缆的电气性能、阻燃性能(单根垂直燃烧试验和成束燃烧试验)、烟密度性能(透光率)、低烟性能(电导率和PH值)、抗辐射量、耐水解性等，普通辐照交联聚乙烯和低烟无卤聚烯烃均不能同时满足要求。
实用新型内容
本实用新型的目的就在于为了解决上述问题而提供一种耐辐射耐水解电缆。
本实用新型通过以下技术方案来实现上述目的：
一种耐辐射耐水解电缆，包括铜线芯、绕包层和聚醚醚酮绝缘层，多条包覆有聚酰亚胺漆的铜丝绞合形成所述铜线芯，所述绕包层包覆于多条所述铜线芯外，所述聚醚醚酮绝缘层包覆于所述绕包层外。
作为优选，所述聚酰亚胺漆包层为220级聚酰亚胺。
聚酰亚胺是一类主链含酰亚胺环重复单元的耐高温芳杂环聚合物，由芳香族二元胺和二酐在二甲基乙酰胺等极性溶剂中，于室温下制得可溶解的聚酰胺酸中间体，经脱水剂作用或250～300℃加热，脱水环化(酰亚胺化)得到聚酰亚胺，固化后的制品可在180～230℃长期使用，具有突出的耐高温、耐辐射和耐化学介质腐蚀性，电绝缘性能、机械性能和尺寸稳定性优良。220级聚酰亚胺可在220℃环境下连续工作，在耐高温、耐严寒、耐冷冻剂、耐化学性、耐辐射等方面有优良性能。
聚醚醚酮简称PEEK，是在主链结构中含有一个酮键和两个醚键的重复单元所构成的高聚物，属特种高分子材料，具有耐高温、耐化学药品腐蚀等物理化学性能，是一类半结晶高分子材料，熔点334℃，软化点168℃，拉伸强度132～148MPa，可用作耐高温结构材料和电绝缘材料。
本实用新型的有益效果在于：
本实用新型所述耐辐射耐水解电缆具有如下优点：
1、采用220级聚酰亚胺漆包铜线芯，具有优良的机械性能、良好的热稳定性、较高的耐辐射性能和良好的介电性能；
2、采用聚醚醚酮作为绝缘护套层，耐热性、耐辐射性、耐水解性、电气绝缘性优异，氧指数也较高，燃烧时发烟量少且无毒；
3、本电缆能长期使用于水蒸气多、环境温度高、辐射剂量强的地方。
附图说明
图1是本实用新型所述耐辐射耐水解电缆的径向截面剖视结构示意图；
图2是本实用新型所述耐辐射耐水解电缆的生产方法的工艺流程图；
图3是本实用新型所述耐辐射耐水解电缆生产过程中的挤包绝缘步骤涉及的产品结构示意图。
具体实施方式
下面结合附图对本实用新型作进一步说明：
如图1所示，本实用新型所述耐辐射耐水解电缆包括铜线芯、绕包层3和聚醚醚酮绝缘层4，多条包覆有220级聚酰亚胺漆2的铜丝1绞合形成所述铜线芯，绕包层3包覆于多条所述铜线芯外，聚醚醚酮绝缘层4包覆于绕包层3外。这里的绕包层3根据需要采用常规的绕包层即可。
为了说明本实用新型所述耐辐射耐水解电缆的可生产性，下面以优选的生产方法来进行具体说明，但下述生产方法只是一种优选实施例，并不是本实用新型的唯一生产方法，更不是创新技术方案，不是保护对象。
如图2所示，本实用新型所述耐辐射耐水解电缆的生产方法，包括以下步骤：
(1)拉丝退火：将铜杆拉丝并退火得到铜丝；铜杆为纯度99.95％的型号为“T1/R”(根据GB/T3952-2008要求，T1表示牌号，R表示热态)的无氧铜杆，采用永雄机械的铜大拉机、多头连续拉线连续退火工艺制备铜丝，制备的单丝退火均匀，线径波动小，减少了工序周转，缩短了生产周期，降低了能耗，大大提高了生产效率；
(2)漆包：在铜丝表面形成聚酰亚胺漆膜，得到漆包线；具体方法为：利用毛毡毛细管原理将大量的220级聚酰亚胺漆吸附在毛毡上，铜丝通过毛毡时表面吸附220级聚酰亚胺漆，此漆在铜丝表面形成漆膜，漆膜在表面张力的作用下均匀的覆盖在铜丝上，进入烘炉后，220级聚酰亚胺漆上的溶剂蒸发，形成坚硬的固体薄膜即聚酰亚胺漆膜；
(3)束线：将多条漆包线绞合形成铜线芯；由于漆包线直径极小，且根数较多，为了保证绞线后产品单丝直径、绞合外径、节距、直流电阻满足要求，需要重点解决绞线时放线与绞线的张力控制，防止张力过大引起冷拉的，使得导体拉伸强度减小，因此采用主动放线一次绞合的工艺，该工艺能有效消除漆包线因绞合时产生冷拉，从而提高绞线品质，最终满足铜线芯的物理性能和电性能要求；
(4)绕包：按常规方式在多条铜线芯外绕包形成绕包层；
(5)挤包绝缘：在绕包层外挤包聚醚醚酮作为绝缘层，得到耐辐射耐水解电缆；具体方法为：挤包螺杆采用Φ70mm、长径比L/D＝24：1、压缩比为3.0:1的螺杆；模具采用在380℃的加工温度下洛氏硬度为52-54的模具；先对绕包层及多条铜线芯进行预热，预热温度为120-200℃；再挤包，如图3所示，挤包机内各位置的温度为：进料口即加料段I的温度为350℃，压缩段II的温度为370℃，机头即均化段III的温度为380℃，模具温度390℃。这里的加料段I、压缩段II、均化段III均以挤包螺杆为参照。
上述实施例只是本实用新型的较佳实施例，并不是对本实用新型技术方案的限制，只要是不经过创造性劳动即可在上述实施例的基础上实现的技术方案，均应视为落入本实用新型专利的权利保护范围内。
Claims (2)
1.一种耐辐射耐水解电缆，其特征在于：包括铜线芯、绕包层和聚醚醚酮绝缘层，多条包覆有聚酰亚胺漆的铜丝绞合形成所述铜线芯，所述绕包层包覆于多条所述铜线芯外，所述聚醚醚酮绝缘层包覆于所述绕包层外。
2.根据权利要求1所述的耐辐射耐水解电缆，其特征在于：所述聚酰亚胺漆包层为220级聚酰亚胺。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107359005A (zh) * | 2016-05-10 | 2017-11-17 | 金杯塔牌电缆有限公司 | 耐辐射耐水解电缆及生产方法 |
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Address after: 610000, Jintai Road, industrial zone, Xindu District, Sichuan, Chengdu, 39 Patentee after: JINBEI TA PAI CABLES CO.,LTD. Address before: 615000, Jintai Road, industrial zone, Xindu District, Sichuan, Chengdu, 39 Patentee before: CHENGDU SANDIAN CABLE CO.,LTD. |
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Address after: No.39 Jintai Road, East Industrial District, Xindu District, Chengdu, Sichuan 610000 Patentee after: Jinbei electric (Chengdu) Co.,Ltd. Address before: No.39 Jintai Road, East Industrial District, Xindu District, Chengdu, Sichuan 610000 Patentee before: JINBEI TA PAI CABLES CO.,LTD. |
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