CN103000278A - 一种柔性防火多芯电缆 - Google Patents
一种柔性防火多芯电缆 Download PDFInfo
- Publication number
- CN103000278A CN103000278A CN2012105448941A CN201210544894A CN103000278A CN 103000278 A CN103000278 A CN 103000278A CN 2012105448941 A CN2012105448941 A CN 2012105448941A CN 201210544894 A CN201210544894 A CN 201210544894A CN 103000278 A CN103000278 A CN 103000278A
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- cable
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- flexible fireproof
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- 238000009413 insulation Methods 0.000 claims description 9
- 230000001586 eradicative Effects 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 10
- 239000002184 metal Substances 0.000 abstract description 10
- 239000000919 ceramic Substances 0.000 abstract description 7
- 239000000843 powder Substances 0.000 abstract description 6
- 229920002379 silicone rubber Polymers 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
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- 238000005452 bending Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Chemical compound 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Abstract
本发明公开了一种柔性防火多芯电缆，包括缆芯，其缆芯是由若干根绝缘线芯绞合而成；其绝缘线芯由导体、绕包在导体外的云母带以及依次挤包在云母带外的绝缘层、内护层构成。在缆芯的空隙处设有填充层，在缆芯外绕包绝缘带，缆芯最外层挤包外护套。本发明使用聚烯烃外护层，与金属护层相比柔软性更高，更容易弯曲，加工、敷设方便，耐酸、耐碱、耐腐蚀优异；另外，云母带外挤包绝缘，与金属加工相比，具有保护作用，不会使云母粉剥落；采用陶瓷化耐火硅橡胶内护层，这种坚硬的陶瓷状壳体具有较好的绝缘性能，同时还可以非常有效的阻挡火焰的继续燃烧，可以保障火灾中通讯、电力线路的通畅。
Description
一种柔性防火多芯电缆
[0001]
技术领域
[0002] 本发明涉及电线电缆领域，具体是指一种柔性防火多芯电缆。
背景技术
[0003] 由于大楼内人口密集，除了其安全及消防设施必须完备以外，一旦发生火灾，其控制电力、监视、导引及警报等系统之线路必须能维持正常的功能。防火电缆在现代化的都市建筑里起着极重要的作用，现有防火电缆往往采用BTTZ氧化镁矿物绝缘电缆，其制造工艺落后复杂，导体采用实芯铜杆，护套为铜管拉拔，因此，电缆呈刚性，柔软性差，难以弯曲，力口工、敷设难度较大。由于外护套采用铜管拉拔而成，受厂房面积限制，电缆制造长度有限，使 用时需增加中间接头，接触电阻增大，降低了输电的效率，增加了输电故障隐患点，难以符合《电力工程电缆设计规范》等相关规范要求。氧化镁矿物绝缘电缆受加工外径限制，很难采用多芯电缆。
[0004] 中国专利CN200410083982.1公开了 “一种柔性防火电缆及其生产工艺和生产设备”，其主要结构是：“将一组金属线芯均匀分布，其纵向被云母带绝缘层相互隔离、并包裹，外面再包裹金属带，金属带环向合拢、并由纵向的一条焊缝封闭，组成柔性防火电缆，若要求电缆有更好的弯曲性能时，在光滑的金属护套上轧制纹络。”这种结构电缆燃烧时云母烧结变硬可以起到绝缘的作用，不管是合成云母带、金云母带、白云母带或其他矿物绝缘带，其加工方法都是将云母粉或矿物绝缘粉利用粘合剂进行粘贴，因此较硬，在金属护套合拢、纵向焊接、轧制纹络等金属加工过程中，云母粉均极易剥落，只要存在剥落均丧失了绝缘的功能，达不到使用要求。采用金属作护层，要求金属具有一定的厚度，与塑料护层相比其柔软性相对较差，电缆更难以弯曲，金属护层耐酸、耐碱、耐腐蚀等性能也相对较差。
[0005] 综上所述，现有技术存在不足之处在于：1、电缆柔软性差，难以弯曲，加工、敷设难度较大；2、在金属护套合拢、纵向焊接、轧制纹络等金属加工过程中，云母粉均极易剥落，只要存在剥落均丧失了绝缘的功能，达不到使用要求；3采用金属护层，耐酸、耐碱、耐腐蚀等性能也相对较差；4、防火耐火性能差，容易导致火灾。
发明内容
[0006] 本发明要解决的技术问题是提供一种柔软性好、防火耐火性好、耐酸、耐碱、耐腐蚀的柔性防火多芯电缆。
[0007] 本发明所述的一种柔性防火多芯电缆，包括缆芯，其缆芯是由若干根绝缘线芯绞合而成；在缆芯的空隙处设有填充层，在缆芯外绕包绝缘带，缆芯最外层挤包外护套。
[0008] 所述的绝缘线芯为三根或三根以上；其绝缘线芯由导体、绕包在导体外的云母带以及依次挤包在云母带外的绝缘层、内护层构成。
[0009] 本发明的有益效果在于：本发明使用聚烯烃外护层，与金属护层相比柔软性更高，更容易弯曲，加工、敷设方便，耐酸、耐碱、耐腐蚀优异；另外，云母带外挤包绝缘，与金属加工相比，具有保护作用，不会使云母粉剥落；本发明采用陶瓷化耐火硅橡胶内护层，可以在500°C以上的高温和火焰烧蚀下，燃烧2〜4min后即开始烧结成坚硬的陶瓷状壳体，而且烧蚀时间越长、温度越高，陶瓷化效果越明显，烧蚀温度可以达到1200〜1500°C，这种坚硬的陶瓷状壳体具有较好的绝缘性能，同时还可以非常有效的阻挡火焰的继续燃烧，可以保障火灾中通讯、电力线路的通畅。陶瓷化硅橡胶在常温下无毒、无味，具备硅橡胶的特征，具有很好的柔软性和弹性，使电缆也具有更好的柔软性，更容易弯曲。
附图说明
[0010] 图1为本发明的结构示意图。
[0011] 具体实施方式： 如图1所示，本发明所述的一种柔性防火多芯电缆，包括缆芯，其缆芯是由三根绝缘线芯绞合而成；所述的绝缘线芯由导体1、绕包在导体I外的云母带2以及依次挤包在云母带2外的绝缘层3、陶瓷化硅橡胶内护层4构成；在缆芯的空隙处设有填充层5，在缆芯外绕包陶瓷化硅橡胶绝缘带6，缆芯最外层挤包无卤低烟阻燃聚烯烃外护套7。
[0012] 本发明提供了一种柔性防火多芯电缆结构形式和实施方法，以上所述仅是本发明的优选实施方法，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 (3)
1. 一种柔性防火多芯电缆，包括缆芯，其特征在于：其缆芯是由若干根绝缘线芯绞合而成；在缆芯的空隙处设有填充层（5)，在缆芯外绕包绝缘带（6)，缆芯最外层挤包外护套(7)。
2.根据权利要求1所述的柔性防火多芯电缆，其特征在于：所述的绝缘线芯为三根或三根以上。
3.根据权利要求1所述的柔性防火多芯电缆，其特征在于：所述的绝缘线芯由导体(I)、绕包在导体（I)外的云母带（2)以及依次挤包在云母带（2)外的绝缘层（3)、内护层（4) 构成。
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| CN103928112A (zh) * | 2013-09-17 | 2014-07-16 | 安徽华天电缆有限公司 | 一种低烟无卤聚烯烃护套电缆 |
| CN103943246A (zh) * | 2014-04-24 | 2014-07-23 | 广州电气输配电有限公司 | 一种环保型绕包式陶瓷化硅橡胶耐火电缆及其制作方法 |
| CN104616788A (zh) * | 2015-01-30 | 2015-05-13 | 云南正晓电缆有限公司 | 耐火控制电缆 |
| CN104616746A (zh) * | 2015-01-12 | 2015-05-13 | 江苏亨通线缆科技有限公司 | 便于施工的铝合金软电缆 |
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| CN110449473A (zh) * | 2019-07-09 | 2019-11-15 | 昆明电缆集团电线有限公司 | 一种稳定生产高质量电线电缆的方法 |
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