WO2022193736A1 - 一种高强度柔性防火耐火电缆及其制作方法 - Google Patents

一种高强度柔性防火耐火电缆及其制作方法 Download PDF

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WO2022193736A1
WO2022193736A1 PCT/CN2021/134604 CN2021134604W WO2022193736A1 WO 2022193736 A1 WO2022193736 A1 WO 2022193736A1 CN 2021134604 W CN2021134604 W CN 2021134604W WO 2022193736 A1 WO2022193736 A1 WO 2022193736A1
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fire
resistant
layer
cable
tape
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PCT/CN2021/134604
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English (en)
French (fr)
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祁登权
龚敏
杨海艳
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重庆泰山电缆有限公司
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Publication of WO2022193736A1 publication Critical patent/WO2022193736A1/zh

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29Protection against damage caused by extremes of temperature or by flame
    • H01B7/295Protection against damage caused by extremes of temperature or by flame using material resistant to flame
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/26Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
    • H01B13/2613Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping

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  • the invention relates to a cable, in particular to a high-strength flexible fire-proof and fire-resistant cable.
  • the technical problem to be solved by the present invention is to provide a high-strength flexible fire-resistant fire-resistant cable, which is mainly used in the laying of cables with a high vertical distance such as skyscrapers (high-rise buildings), which can resist external impact. Impact, resistance to long-distance laying of its own tension, compression and high-strength flexibility.
  • the present invention provides a high-strength flexible fire-resistant and fire-resistant cable, which includes a cable core, and the cable core is provided with a flame-retardant and fire-resistant tape layer, a copper sheath, an oxygen barrier layer, and an armor in sequence.
  • the cabling core is composed of at least one insulated wire core and a filling layer, and the insulated wire core includes a conductor and a refractory layer and an insulating layer sequentially arranged outside the conductor.
  • the refractory layer adopts calcined mica tape.
  • the insulating layer adopts a ceramized silicone rubber tape.
  • the filling layer is filled with ceramic refractory filling rope.
  • the oxygen barrier layer adopts a halogen-free low-smoke flame retardant polyolefin oxygen barrier layer.
  • the armor layer is armored with galvanized steel wire.
  • outer sheath is a ceramized silicone rubber sheath.
  • two or more of the insulated wire cores are twisted into a cable, and the space between the insulated wire cores is filled with a filling layer to make it round to form the cabled core.
  • the flame-retardant and fire-resistant tape layer (5) is formed by outer wrapping of a ceramic silicon rubber composite tape.
  • the solution also provides a method for manufacturing a high-strength flexible fire-resistant fire-resistant cable, comprising the following steps:
  • insulated wire core wrap the conductor with at least one layer of calcined mica tape, and then wrap the ceramic silicon rubber tape to form the insulated wire core; 2)
  • the insulated wire core is cabled and wrapped with tape: two or more of the above
  • the insulated cores are twisted into cables, and the gaps between the insulated cores are filled with ceramic refractory filling ropes.
  • the ceramic silicon rubber composite tape is wrapped outside to ensure that the cores are round and the cable structure is stable; 3) Copper sheath production : It is produced by welding corrugated copper sheath to improve the bending performance of the cable; 4) Extruded oxygen barrier layer: The copper sheath is extruded with a halogen-free low-smoke flame retardant polyolefin oxygen barrier with high oxygen index; 5) Armored : Steel wire armor is carried out on the outside of the oxygen barrier layer, and then the steel tape and wrapping tape are reversely tied; 6) Outer sheath: Extrude the ceramic silicon rubber sheath to form the finished cable.
  • the cable of the invention has a simple structure, few production processes, and has a higher level of fire resistance and fire resistance. Good performance, can withstand large tensile force, pressure resistance and large external force impact, can be mass-produced, and the production section length can be determined according to customer needs. Mainly used in high-rise building (skyscraper) cable applications, in the case of high vertical distance, it can resist the tension of long-distance laying itself.
  • FIG. 1 is a schematic structural diagram of a high-strength flexible fire-resistant fire-resistant cable according to the present invention.
  • the present invention provides a high-strength flexible fire-resistant and fire-resistant cable, which includes a cable core, and the cable core is provided with a flame-retardant and fire-resistant tape layer 5, a copper sheath 6, and an oxygen barrier in sequence.
  • layer 7, armor layer 8 and outer sheath 9 the cabled core consists of at least one insulated wire core and filler layer 4, the insulated wire core includes conductor 1 and its refractory layer sequentially arranged outside conductor 1 2 and insulating layer 3.
  • the conductor 1 is a copper conductor
  • the cabling core includes 4 insulated wire cores, which are twisted into a cable, and the space between the insulated wire cores is filled with a filling layer 7 to make it round, forming the cabling. cable core.
  • the refractory layer 2 adopts calcined mica tape.
  • Calcined mica tape has the characteristics of small expansion coefficient, high dielectric strength, high mica content, high resistivity and uniform dielectric constant of natural mica. 1000°C).
  • the insulating layer 3 is a ceramic silicon rubber tape. Under the condition of no burning of the cable, it has good insulation and moisture-proof performance of the cable, and plays the role of heat insulation, fire prevention and fire resistance under burning conditions.
  • the filling layer 4 is filled with a ceramic refractory filling rope.
  • This material has the same performance and compatibility as ceramic silicone rubber belt, and also avoids environmental pollution and harm to human body when using glass fiber rope.
  • the copper sheath 6 has high temperature fire resistance, fire resistance and water resistance, good bending and flexibility, and also has the function of shielding and carrying short-circuit current.
  • the oxygen barrier layer 7 is an extruded halogen-free low-smoke flame retardant polyolefin oxygen barrier layer.
  • the water layer can isolate the air, and at the same time play a role in cooling, and scorch the crust, reduce the heat transfer inward, and also play the role of an isolation layer, avoiding the direct contact with the copper sheath when the steel wire is armored. damage due to contact.
  • the armoring layer 8 is armored with galvanized steel wire.
  • the steel wire mainly has strong tensile, compressive and external impact resistance, and is extremely important in the cable structure, playing the role of tensile, compressive and external impact resistance. It also has high temperature resistance and can also carry short-circuit current.
  • the outer gap of the galvanized steel wire is wrapped and reversed with the metal strip, and then the strip is overlapped to ensure that the metal wire is not loose during the production process and does not affect the production of the next process.
  • the outer sheath 9 is a ceramic silicon rubber sheath.
  • Ceramicized silicone rubber has excellent fire resistance, flame retardant, low smoke, non-toxic and other characteristics.
  • the residue after combustion is a hard ceramicized shell. /T19216. It is stipulated in the temperature of 950°C-1000°C, which is subjected to fire for 90 minutes and cooled for 15 minutes. It is suitable for any place where fire prevention is required. It plays a solid protection role in ensuring smooth power transmission in case of fire.
  • the flame-retardant and refractory tape layer 5 is formed by outer wrapping of a ceramic silicon rubber composite tape.
  • the solution also provides a method for manufacturing a high-strength flexible fire-resistant fire-resistant cable, comprising the following steps:
  • Insulated cores are cabled and wrapped with tape: two or more of the insulated cores are twisted into cables, and the gaps between the insulated cores are filled with ceramic refractory filling ropes. After cabling, ceramic silicon rubber is wrapped outside. The composite tape ensures that the core is round and the cable structure is stable.
  • Copper sheath production It is produced by welding corrugated copper sheath to improve the bending performance of the cable.
  • Extruded oxygen barrier layer A halogen-free low-smoke flame retardant polyolefin oxygen barrier layer with high oxygen index is extruded on the outside of the copper sheath.
  • Outer sheath extruded ceramic silicon rubber sheath to form the finished cable.

Abstract

一种高强度柔性防火耐火电缆及其制作方法,该电缆包括成缆缆芯,成缆缆芯外依次设置有阻燃耐火包带层(5)、铜护套(6)、隔氧层(7)、铠装层(8)和外护套(9),成缆缆芯由至少一根绝缘线芯和填充层(4)构成,绝缘线芯包括导体(1)及依次设在导体(1)外的耐火层(2)和绝缘层(3)。该高强度柔性防火耐火电缆适用于高层建筑,具有抗冲击、抗拉、抗压且具有高强度柔性的优点。

Description

一种高强度柔性防火耐火电缆及其制作方法 技术领域
本发明涉及一种电缆,特别是涉及一种高强度柔性防火耐火电缆。
背景技术
随着我国城市的快速发展,我国的高层建筑,大型写字楼、医院、综合商圈越来越多、轨道交通越来越发达,普通的耐火电缆已无法满足市场需求,而市场上耐火电缆种类繁多,结构复杂,不同环境下使用不同的耐火电缆结构,针对此现象,设计一种具有高强度的柔性防火耐火电缆以满足高层建筑的应用非常有必要性。
在全球经济的不断的发展的今天,世界各地的摩天大楼逐年增加,摩天大楼已成为各个国家城市的品牌象征,据统计全世界在建和规划建设的300米以上的摩天大楼总数为一百多座,中国占四十座,占世界摩天大厦总数的40%左右,而摩天大楼(高层建筑)场所所需电缆要求极高,研究高强度的柔性防火耐火电缆,其性能不仅要满足防火耐火性能外,还要具有高强度的抗拉和能承受极大的外力冲击性能具有较大的意义。
因此本领域技术人员致力于开发一种高强度柔性防火耐火电缆,特别是外部受力冲击、抗拉、抗压且具有高强度柔性防火耐火电缆的性能,主要应用在摩天大楼(高层建筑),针对垂直距离较高的电缆铺设,满足电缆在火焰高温下线路的完整性试验要求,以及线缆中数据传输和系统的正常通信。
发明内容
有鉴于现有技术的上述缺陷,本发明所要解决的技术问题是提供一种高强度柔性防火耐火电缆,主要应用于摩天大楼(高层建筑)这种垂直距离较高的电缆铺设,能够抗外部冲力冲击、抗自身长距离铺设的拉力、抗压且具有高强度柔性。
为实现上述目的,本发明提供了一种高强度柔性防火耐火电缆,包括成缆缆芯,所述成缆缆芯外依次设置有阻燃耐火包带层、铜护套、隔氧层、铠装层和外护套,所述成缆缆芯由至少一根绝缘线芯和填充层,所述绝缘线芯包括导体及其依次设在导体外的耐火层和绝缘层。
进一步,所述耐火层采用煅烧云母带。
进一步,所述绝缘层采用陶瓷化硅橡胶带。
进一步,所述填充层采用陶瓷化耐火填充绳填充。
进一步,所述隔氧层采用无卤低烟阻燃聚烯烃隔氧层。
进一步,所述铠装层采用镀锌钢丝铠装。
进一步,所述外护套采用陶瓷化硅橡胶护套。
进一步,两根以上的所述绝缘线芯绞合成缆,所述绝缘线芯之间的空隙填充有填充层使其圆整,形成所述成缆缆芯。
进一步,所述阻燃耐火包带层(5)采用陶瓷化硅橡胶复合带外绕包形成。
本方案还提供一种高强度柔性防火耐火电缆的制作方法,包括如下步骤:
1)绝缘线芯生产:将导体绕包至少一层煅烧云母带,然后绕包陶瓷化硅橡胶带形成绝缘线芯;2)绝缘线芯成缆、包带绕包:两根以上的所述绝缘线芯绞合成缆,绝缘线芯之间空隙采用陶瓷化耐火填充绳填充,成缆后外绕包陶瓷化硅橡胶复合带,保证线芯圆整,电缆结构稳固;3)铜护套生产:采用焊接波 纹式铜护套生产,提高电缆的弯曲性能;4)挤包隔氧层:铜护套外面挤包高氧指数的无卤低烟阻燃聚烯烃隔氧层;5)铠装:隔氧层外面进行钢丝铠装,然后反扎钢带和绕包包带;6)外护套:挤包陶瓷化硅橡胶护套形成成品电缆。
本发明的有益效果是:本发明电缆结构简单,生产工序少,具有较高等级的防火耐火性能,性能符合GB/T34926、GB/T 19666、GB/T 19216、GA 306.2、IEC 60331要求,弯曲性能好,能承受较大的拉力、抗压力和较大的外力冲击,可大批量生产,生产段长可根据客户需求而定。主要应用于在高层建筑(摩天大楼)电缆应用方面,在垂直距离较高的情况下,可以抗自身长距离铺设的拉力。
附图说明
图1是本发明一种高强度柔性防火耐火电缆的结构示意图。
具体实施方式
下面结合附图和实施例对本发明作进一步说明,需注意的是,在本发明的描述中,术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方式构造和操作,因此不能理解为对本发明的限制。术语“第一”、“第二”、“第三”等仅用于描述目的,而不能理解为指示或暗示相对重要性。
如图1所示,本发明提供了一种高强度柔性防火耐火电缆,包括成缆缆芯,所述成缆缆芯外依次设置有阻燃耐火包带层5、铜护套6、隔氧层7、铠装层8和外护套9,所述成缆缆芯由至少一根绝缘线芯和填充层4,所述绝缘线芯包括导体1及其依次设在导体1外的耐火层2和绝缘层3。本实施例中,导体1为铜 导体,成缆缆芯包括4根绝缘线芯,4根绞合成缆,绝缘线芯之间的空隙填充有填充层7使其圆整,形成所述成缆缆芯。
本实施例中,所述耐火层2采用煅烧云母带。煅烧云母带除具有天然云母的特性膨胀系数小、介电强度大、云母含量高、电阻率高和介电常数均匀以外,其主要特点是耐热等级高,可达到A级耐火水平(950~1000℃)。
本实施例中,所述绝缘层3采用陶瓷化硅橡胶带。在电缆无燃烧条件下,具有电缆良好的绝缘、防潮性能,在燃烧条件下起到隔热防火耐火作用。
本实施例中,所述填充层4采用陶瓷化耐火填充绳填充。此材料具有等同陶瓷化硅橡胶带性能和相容性之外,还避免采用玻纤绳时造成环境污染以及对人体的伤害。
本实施例中,铜护套6具有较高温度的防火、耐火性能以及防水性能,弯曲和柔软性好,还具备屏蔽和承载短路电流作用。
本实施例中,所述隔氧层7采用挤包无卤低烟阻燃聚烯烃隔氧层。燃烧时可以释放水分,水层可以隔离空气,同时起到降温的作用,并且烧焦结壳,减少热量向内传递,同时也起到隔离层作用,避免了钢丝铠装时与铜护套直接接触而造成损伤。
本实施例中,所述铠装层8采用镀锌钢丝铠装。钢丝主要具有较强的抗拉、抗压及外部冲击力外,在电缆结构中及其重要,起抗拉、抗压、抗外冲击的作用。还具有较高的耐温性能,也可承载短路电流。镀锌钢丝外面间隙绕包反扎金属带,再重叠绕包带材,保证金属丝在生产过程中不松散,确保不影响下道工序的生产。
本实施例中,所述外护套9采用陶瓷化硅橡胶护套。陶瓷化硅橡胶具有极 佳的防火、阻燃、低烟、无毒等特性,其燃烧后残余物为坚硬的陶瓷化壳体,硬壳在火灾环境中不熔且不滴落,可通过GB/T19216.中规定在950℃-1000℃温度下,受火90min,冷却15min线路完整性实验,适用于任何需要防火的场所,在保证火灾情况下电力传输通畅中起到了坚固的保护作。
本实施例中,所述阻燃耐火包带层5采用陶瓷化硅橡胶复合带外绕包形成。
本方案还提供一种高强度柔性防火耐火电缆的制作方法,包括如下步骤:
1)绝缘线芯生产:将导体绕包至少一层煅烧云母带,然后绕包陶瓷化硅橡胶带形成绝缘线芯。
2)绝缘线芯成缆、包带绕包:两根以上的所述绝缘线芯绞合成缆,绝缘线芯之间空隙采用陶瓷化耐火填充绳填充,成缆后外绕包陶瓷化硅橡胶复合带,保证线芯圆整,电缆结构稳固。
3)铜护套生产:采用焊接波纹式铜护套生产,提高电缆的弯曲性能。
4)挤包隔氧层:铜护套外面挤包高氧指数的无卤低烟阻燃聚烯烃隔氧层。
5)铠装:隔氧层外面进行钢丝铠装,然后反扎钢带和绕包包带。
6)外护套:挤包陶瓷化硅橡胶护套形成成品电缆。
以上详细描述了本发明的较佳具体实施例。应当理解,本领域的普通技术人员无需创造性劳动就可以根据本发明的构思作出诸多修改和变化。因此,凡本技术领域中技术人员依本发明的构思在现有技术的基础上通过逻辑分析、推理或者有限的实验可以得到的技术方案,皆应在由权利要求书所确定的保护范围内。

Claims (10)

  1. 一种高强度柔性防火耐火电缆,其特征是:包括成缆缆芯,所述成缆缆芯外依次设置有阻燃耐火包带层、铜护套、隔氧层、铠装层和外护套,所述成缆缆芯由至少一根绝缘线芯和填充层,所述绝缘线芯包括导体及其依次设在导体外的耐火层和绝缘层。
  2. 如权利要求1所述的一种高强度柔性防火耐火电缆,其特征是:所述耐火层采用煅烧云母带。
  3. 如权利要求1所述的一种高强度柔性防火耐火电缆,其特征是:所述绝缘层采用陶瓷化硅橡胶带。
  4. 如权利要求1所述的一种高强度柔性防火耐火电缆,其特征是:所述填充层采用陶瓷化耐火填充绳填充。
  5. 如权利要求1所述的一种高强度柔性防火耐火电缆,其特征是:所述隔氧层采用无卤低烟阻燃聚烯烃隔氧层。
  6. 如权利要求1所述的一种高强度柔性防火耐火电缆,其特征是:所述铠装层采用镀锌钢丝铠装。
  7. 如权利要求1所述的一种高强度柔性防火耐火电缆,其特征是:所述外护套采用陶瓷化硅橡胶护套。
  8. 如权利要求1所述的一种高强度柔性防火耐火电缆,其特征是:两根以上的所述绝缘线芯绞合成缆,所述绝缘线芯之间的空隙填充有填充层使其圆整,形成所述成缆缆芯。
  9. 如权利要求1所述的一种高强度柔性防火耐火电缆,其特征是:所述阻 燃耐火包带层采用陶瓷化硅橡胶复合带外绕包形成。
  10. 如权利要求1至9所述的一种高强度柔性防火耐火电缆的制作方法,其特征是:包括如下步骤:
    1)绝缘线芯生产:将导体绕包至少一层煅烧云母带,然后绕包陶瓷化硅橡胶带形成绝缘线芯;
    2)绝缘线芯成缆、包带绕包:两根以上的所述绝缘线芯绞合成缆,绝缘线芯之间空隙采用陶瓷化耐火填充绳填充,成缆后外绕包陶瓷化硅橡胶复合带,保证线芯圆整,电缆结构稳固;
    3)铜护套生产:采用焊接波纹式铜护套生产,提高电缆的弯曲性能;
    4)挤包隔氧层:铜护套外面挤包高氧指数的无卤低烟阻燃聚烯烃隔氧层;
    5)铠装:隔氧层外面进行钢丝铠装,然后反扎钢带和绕包包带;
    6)外护套:挤包陶瓷化硅橡胶护套形成成品电缆。
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