CN113871090B - 一种无卤低烟高阻燃电力电缆 - Google Patents
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Abstract
本发明公开了一种无卤低烟高阻燃电力电缆，包括线芯导体，线芯导体外侧包覆交联聚乙烯绝缘层，交联聚乙烯绝缘层的外侧设有填充层，填充层的外侧设有第一阻水带绕包层，第一阻水带绕包层的外侧设有无卤低烟阻燃内护套，无卤低烟阻燃内护套和第一阻水带绕包层之间设有异形铜套屏蔽层，在无卤低烟阻燃内护套燃烧热量传递给异形铜套屏蔽层时，异形铜套屏蔽层会受热膨胀从而展开紧贴无卤低烟阻燃内护套的内壁，在异形铜套屏蔽层和第一阻水带绕包层之间形成真空层，该真空层能够阻隔燃烧热量传递至线芯导体，避免电缆燃烧时快速蔓延至线芯导体，导致线芯导体受损而影响电力电缆正常工作；具有无卤低烟特点的同时阻燃性能高。
Description
技术领域
本发明属于电力电缆技术领域，具体涉及一种无卤低烟高阻燃电力电缆。
背景技术
目前现有的无卤低烟高阻燃电力电缆一般主要通过在电缆上设置无卤低烟阻燃护套来提高电缆的阻燃性能及降低电缆燃烧时产生的烟量；无卤低烟阻燃护套根据需要可以设置多层，而在此基础上若要进一步提高电力电缆的阻燃性能及降低烟量，就需要从无卤低烟阻燃护套的组分上对无卤低烟阻燃护套的成分进行改性优化，这种通过对无卤低烟阻燃护套的组分进行改性来提升电力电缆的阻燃性能及降低烟量的方式，涉及到组分的改良，其改进及试验周期长且涉及到工艺的匹配，工作量大而且电缆的阻燃及降低烟量的实际性能提升程度比较小。
发明内容
针对现有技术的不足，本发明旨在提供一种在辅助使用现有无卤低烟阻燃护套的基础上，不对无卤低烟阻燃护套组分进行改性而通过对电缆的结构组成进行改良来提升电缆的阻燃及降低烟量的性能的无卤低烟高阻燃电力电缆。
为实现上述目的，本发明采用如下技术方案：
一种无卤低烟高阻燃电力电缆，包括线芯导体，线芯导体外侧包覆交联聚乙烯绝缘层，交联聚乙烯绝缘层的外侧设有填充层，填充层的外侧设有第一阻水带绕包层，第一阻水带绕包层的外侧设有无卤低烟阻燃内护套，无卤低烟阻燃内护套和第一阻水带绕包层之间设有异形铜套屏蔽层，异形铜套屏蔽层的断面呈封闭的波浪环状，异形铜套屏蔽层能在无卤低烟阻燃内护套燃烧时受热变形并在异形铜套屏蔽层和第一阻水带绕包层之间形成真空层。
本发明具有如下有益效果：
本发明无卤低烟高阻燃电力电缆，其无卤低烟阻燃内护套和第一阻水带绕包层之间设有异形铜套屏蔽层，异形铜套屏蔽层能在无卤低烟阻燃内护套燃烧时受热变形并在异形铜套屏蔽层和第一阻水带绕包层之间形成真空层；具有在辅助使用现有无卤低烟阻燃护套的基础上，不对无卤低烟阻燃护套组分进行改性而通过对电缆的结构组成进行改良来提升电缆的阻燃及降低烟量的性能、阻燃性能高的特点。
附图说明
图1为本发明无卤低烟高阻燃电力电缆在正常使用状态下的示意图；
图2为本发明无卤低烟高阻燃电力电缆的异形铜套屏蔽层结构图；
图3为本发明无卤低烟高阻燃电力电缆在燃烧时异形铜套屏蔽层受热变形后的示意图。
具体实施方式
下面结合附图及具体实施例，对本发明作进一步的描述，以便于更清楚地理解本发明要求保护的技术思想。
如图1所示的无卤低烟高阻燃电力电缆，包括线芯导体1，线芯导体1外侧包覆交联聚乙烯绝缘层2，交联聚乙烯绝缘层2的外侧设有填充层3，填充层3优选采用阻燃岩棉绳材料制成，可提升对线芯导体1的阻燃防护。填充层3的外侧设有第一阻水带绕包层4，第一阻水带绕包层4的外侧设有无卤低烟阻燃内护套6，无卤低烟阻燃内护套6本身具备一定的阻燃及降低烟量的性能，无卤低烟阻燃内护套6和第一阻水带绕包层4之间设有异形铜套屏蔽层5，如图2所示该异形铜套屏蔽层5的断面具体呈封闭的波浪环状。这种异形铜套屏蔽层5如图3所示，在无卤低烟阻燃内护套6燃烧热量传递给异形铜套屏蔽层5时，异形铜套屏蔽层5会受热膨胀从而展开紧贴无卤低烟阻燃内护套6的内壁，在无卤低烟阻燃内护套6燃烧时受热变形并在异形铜套屏蔽层5和第一阻水带绕包层4之间形成真空层10，该真空层10能够阻隔燃烧热量传递至线芯导体1，避免电缆燃烧快速蔓延至线芯导体1，导致线芯导体1受损而影响电力电缆正常工作，为电力电缆抢救争取时间，阻燃性能相对现有简单的设置无卤低烟阻燃护套方式更高。
无卤低烟阻燃内护套6的外侧设有无卤低烟阻燃外护套9，无卤低烟阻燃外护套9和无卤低烟阻燃内护套6之间设有钢带铠装层7，无卤低烟阻燃外护套9的设置可以增强一层电缆的阻燃防护，而钢带铠装层7的设置可以提高电缆的整体抗拉、抗压等机械性能。钢带铠装层7和无卤低烟阻燃外护套9之间还可以再设置第二阻水带绕包层8，进一步提高电力电缆的阻止水分进入其内部的性能。
上述无卤低烟阻燃内护套6、无卤低烟阻燃外护套9均采用无卤低烟阻燃聚烯烃材料制成，这属于现有公知技术，在此不再对该无卤低烟阻燃聚烯烃材料进行解释说明。上述第一阻水带绕包层4、第二阻水带绕包层8也属于现有公知技术部分，具体在此不再限定其具体材料。
如图2所示，异形铜套屏蔽层5与无卤低烟阻燃内护套6对应的外壁面还可以再涂覆阻燃涂层50，可以进一步提升电缆阻燃性能，减缓燃烧热量蔓延传递至线芯导体1的速度；该阻燃涂层50可以采用陶瓷涂层，如在异形铜套屏蔽层5表面涂覆厚度为200μm的陶瓷涂层。需要说明的是，这种阻燃陶瓷涂层属于公知技术内容，可直接于市场上购买获得且其涂覆工艺也均属于公知技术，在此不再对该陶瓷涂层及其涂覆工艺进行详细阐述。还可以在异形铜套屏蔽层5与第一阻水带绕包层4对应的内壁面设置阻燃涂层50，可进一步提升电缆阻燃性能，减缓燃烧热量蔓延传递至线芯导体1的速度。
对于本领域的技术人员来说，可根据以上描述的技术方案以及构思，做出其它各种相应的改变以及变形，而所有的这些改变以及变形都应该属于本发明权利要求的保护范围之内。
Claims (9)
1.一种无卤低烟高阻燃电力电缆，包括线芯导体，所述线芯导体外侧包覆交联聚乙烯绝缘层，所述交联聚乙烯绝缘层的外侧设有填充层，所述填充层的外侧设有第一阻水带绕包层，所述第一阻水带绕包层的外侧设有无卤低烟阻燃内护套，其特征在于，所述无卤低烟阻燃内护套和所述第一阻水带绕包层之间设有异形铜套屏蔽层，所述异形铜套屏蔽层的断面呈封闭的波浪环状，所述异形铜套屏蔽层能在所述无卤低烟阻燃内护套燃烧时受热变形并在所述异形铜套屏蔽层和所述第一阻水带绕包层之间形成真空层。
2.如权利要求1所述的无卤低烟高阻燃电力电缆，其特征在于，所述异形铜套屏蔽层与所述无卤低烟阻燃内护套对应的外壁面设有阻燃涂层。
3.如权利要求2所述的无卤低烟高阻燃电力电缆，其特征在于，所述异形铜套屏蔽层与所述第一阻水带绕包层对应的内壁面设有阻燃涂层。
4.如权利要求1所述的无卤低烟高阻燃电力电缆，其特征在于，所述填充层采用阻燃岩棉绳材料制成。
5.如权利要求1所述的无卤低烟高阻燃电力电缆，其特征在于，所述无卤低烟阻燃内护套的外侧设有无卤低烟阻燃外护套，所述无卤低烟阻燃外护套和所述无卤低烟阻燃内护套之间设有钢带铠装层。
6.如权利要求5所述的无卤低烟高阻燃电力电缆，其特征在于，所述钢带铠装层和所述无卤低烟阻燃外护套之间设有第二阻水带绕包层。
7.如权利要求5所述的无卤低烟高阻燃电力电缆，其特征在于，所述无卤低烟阻燃内护套、所述无卤低烟阻燃外护套均采用无卤低烟阻燃聚烯烃材料制成。
8.如权利要求3所述的无卤低烟高阻燃电力电缆，其特征在于，所述阻燃涂层采用陶瓷涂层。
9.如权利要求8所述的无卤低烟高阻燃电力电缆，其特征在于，所述陶瓷涂层在所述异形铜套屏蔽层表面的涂覆厚度为200μm。
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| CN212461187U (zh) * | 2020-07-22 | 2021-02-02 | 安徽国通电力建设有限公司 | 一种防火耐高温型电缆 |
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| JPH04282509A (ja) * | 1991-03-12 | 1992-10-07 | Japan Atom Energy Res Inst | 真空用電線 |
| CN111696716A (zh) * | 2020-06-19 | 2020-09-22 | 安徽渡江电缆集团有限公司 | 一种新能源阻燃电缆 |
| CN212461187U (zh) * | 2020-07-22 | 2021-02-02 | 安徽国通电力建设有限公司 | 一种防火耐高温型电缆 |
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