WO2021120565A1 - 一种耐火电缆制作方法 - Google Patents

一种耐火电缆制作方法 Download PDF

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Publication number
WO2021120565A1
WO2021120565A1 PCT/CN2020/097064 CN2020097064W WO2021120565A1 WO 2021120565 A1 WO2021120565 A1 WO 2021120565A1 CN 2020097064 W CN2020097064 W CN 2020097064W WO 2021120565 A1 WO2021120565 A1 WO 2021120565A1
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Prior art keywords
layer
fire
yarn
manufacturing
resistant
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PCT/CN2020/097064
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English (en)
French (fr)
Inventor
罗英宝
童建芳
仲华
姜正权
王文强
黄霁月
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浙江正导电缆有限公司
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Publication of WO2021120565A1 publication Critical patent/WO2021120565A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion

Definitions

  • the invention relates to the technical field of cable manufacturing, in particular to a method for manufacturing a fire-resistant cable.
  • the manufacturing process of fire-resistant and heat-insulated composite power cable includes the following steps: a. Make the cable core, compress the round copper conductor to reduce the outer diameter of the compacted conductor by 11%, and then place it outside the compacted conductor Extrude the insulating and shielding composite layer to make the cable core for use; b. To make the optical cable unit, first make the loose tube of the optical fiber.
  • the loose tube of the optical fiber is equipped with 2-12 core optical fibers, and 4-6 loose tubes of optical fiber are enclosed A circle, the center of the circle is provided with a reinforcing member, and then the optical fiber loose tube is covered with a protective sleeve to make an optical cable unit, and water blocking is filled between the protective sleeve and the loose tube, and between the loose tube and the reinforcing member Yarn;
  • preparation of the heat insulation layer the heat insulation layer is made of the following materials by weight: EVA: 20 to 35 parts, LLDPE plastic: 10 to 25 parts, AL (OH) 3: 45 to 55 parts, Mg ( OH) 2: 25 ⁇ 40 parts, 2-5 parts of polymer additives, 5-10 parts of adhesive; d.
  • the optical cable unit and the cable core are extruded together to form a cable, and the optical cable unit and the cable
  • the core is sequentially extruded with a heat insulation layer, a refractory layer, an oxygen barrier layer, an impact resistance layer and an outer sheath layer.
  • the patent document with the publication number CN101702343B provides "a method for manufacturing a fire-resistant cable", which includes the following steps: step one, stranding the conductor; step two, wrapping the mica layer on the outer layer of the conductor; step three, in the mica Extrude the silicone rubber insulating layer outside the layer; step 4, longitudinally wrap the metal inner sheath outside the silicone rubber insulating layer and weld along the longitudinal direction; step 5, arrange multiple cable cores formed in step 4 side by side, and then place them in the gap Fill the mica rope, and the cable core formed in step 4 is longitudinally covered with a metal outer sheath and welded along the longitudinal direction; step 6, inspection.
  • the fire-resistant cable adopts inner and outer metal copper sheaths to enhance the fire-resistant and mechanical protection performance.
  • two layers of mica are used to overlap and wrap, and then the silicon rubber insulation layer is extruded, which has good electrical properties, heat resistance, and fire resistance.
  • the above methods limit the development of the conductor diameter to a smaller diameter.
  • the width of the mica layer that can be used is relatively narrow.
  • the use of wrapping method to fix the mica, in order to better coat the conductor will inevitably lead to production The speed is greatly reduced, the construction period is lengthened, and the inability to mass produce increases the production cost.
  • the fire resistance and data transmission are good, but the market promotion rate is low.
  • the wrapping In addition, in order to ensure the fire resistance, the wrapping must be complete and fully wrapped with the conductor. Higher requirements are put forward for the accuracy of wrapping equipment; the silicone rubber insulation layer is squeezed out of the mica layer, which is easier to damage and increases data transmission interference.
  • the setting of the metal inner and outer protective layer increases the difficulty and cost of manufacturing technology. To a certain extent, it also limits the deformability of the cable.
  • the technical problem to be solved by the present invention is to provide a fire-resistant cable manufacturing method with good fire resistance protection, high production efficiency, simple manufacturing and cost saving in view of the above-mentioned shortcomings of the prior art.
  • a method for manufacturing a fire-resistant cable includes the following steps:
  • Insulation production an insulated core is formed by extruding an insulating outer layer outside the conductor;
  • a mica layer of hot melt adhesive is arranged on the inner surface of the insulated wire core and fixed with a cable tie, and then sent to an oven to heat the mica layer and the insulating outer layer, The overlapping parts of the mica layers are tightly bonded to form a fire-resistant core;
  • Twisting twisting the two fire-resistant cores together to form a twisted pair
  • Extrusion sheath a thermoplastic material layer is extruded outside the braided cable core.
  • the use of a cable tie to fix includes:
  • a refractory composite tape is wrapped around the mica layer.
  • the use of a cable tie to fix includes:
  • the yarn binding device is used to bind yarns bidirectionally outside the mica layer to form a bidirectional yarn binding layer.
  • the yarn binding device includes: a frame and a front yarn releasing tube and a rear yarn releasing tube respectively arranged at the front and rear ends of the work surface of the frame, and both of the front yarn releasing tube and the rear yarn releasing tube are A yarn group and a yarn break alarm are arranged, and the yarn binding direction of the front yarn feeding drum is opposite to the yarn binding direction of the rear yarn feeding drum.
  • the two-way binding yarn layer is a refractory yarn layer.
  • the two-way binding yarn layer is made of glass fiber yarn or aramid yarn.
  • the step (1) includes using an oxygen-free copper rod to draw a multi-stranded flexible conductor.
  • the insulating outer layer is an HDPE layer.
  • a twist-free twisting machine is used to twist the two fire-resistant cores together to form a twisted pair.
  • a twist-free twisting machine is used to twist a plurality of the twisted pairs together to form a multi-pair wire.
  • the present invention has the following beneficial effects: the production process is simple, the production efficiency is high, the quality is guaranteed, the cost is low, and the fire resistance is excellent.
  • the produced cable can be used normally for a long time in the fire, ensuring the normal transmission of information, Feedback, and the signal transmission of each insulated core in a fire is not easy to interfere with each other, which is very suitable for cable equipment such as computer rooms and public places.
  • This embodiment provides a method for manufacturing a fire-resistant cable, which includes the following steps:
  • Insulation production an insulated core is formed by extruding an insulating outer layer outside the conductor;
  • a mica layer of hot melt adhesive is arranged on the inner surface of the insulated wire core and fixed with a cable tie, and then sent to an oven to heat the mica layer and the insulating outer layer, The overlapping parts of the mica layers are tightly bonded to form a fire-resistant wire core;
  • the mica layer can be used conventionally used mica tape, and its width is set according to the diameter of the conductor covered by it, and is generally set so that its width is slightly larger than the circumference of the conductor, thereby making The overlap of the mica layer can be directly tightly bonded and fixed by hot melt adhesive to ensure the wrapping effect and wrapping efficiency;
  • Twisting twisting the two fire-resistant cores together to form a twisted pair
  • Cable formation multiple twisted pairs are twisted together to form a multi-pair cable; generally, four twisted pairs are used for twisting;
  • a braid layer is woven outside the aluminum foil layer to form a braided cable core; the aluminum foil layer can prevent data transmission interference and increase fire resistance. The layer is used to cover and fix the aluminum foil layer;
  • Extrusion sheath a thermoplastic material layer is extruded outside the braided cable core to form the outermost sheath. At this point, the fire-resistant cable is finished and can be used in public places and computer rooms.
  • the fire-resistant cables produced have high heat resistance and fire resistance.
  • the insulating outer layer is first extruded and the mica layer is longitudinally covered. , On the one hand, it is conducive to the perfect fit between the mica layer and the insulating outer layer through hot melt adhesive, ensuring higher fire resistance.
  • the mica layer protects not only the conductor, but also the insulating outer layer, which is beneficial to guarantee The data transmission of the single-core wire is not interfered by other single-core wires, which prolongs the time of data transmission and power supply of the fire-resistant cable during a fire; in addition, the mica layer adopts the method of longitudinal wrapping and the insulated core combination and passes hot melt glue It can be fixed with a cable tie. Compared with the traditional wrapping method, in addition to greatly improving the wrapping efficiency and being suitable for fire resistance protection of thinner conductors, its wrapping performance is better, and it is more able to resist the late cable production process.
  • the twisting during the twisting process and the use process will not cause the loosening of the mica layer caused by the back-twisting and the reduction of the wrapping, which greatly improves the fire resistance of the cable. It is simple to manufacture, can be mass-produced, and is cost-saving. Market promotion, the effective time of data transmission in fires is guaranteed, which can contribute to maintaining power supply for a long time and providing data backup in fires.
  • the use of cable ties to fix in the step (3) includes:
  • a refractory composite tape is wrapped around the mica layer.
  • the fire-resistant composite tape can be used in the cable in the prior art, such as the fire-resistant insulation tape provided by the patent document with the publication number CN102681115B, and the fire-resistant mica tape provided by the patent document with the publication number CN205194357U, etc.
  • it can further increase the wrapping and fixing of the refractory composite tape to the mica layer on the basis of the hot melt adhesive fixation to ensure the structural stability of the mica layer coating.
  • it can also increase a certain fire resistance performance and prolong the fire Working life.
  • a single refractory composite belt can be wrapped, or two refractory composite belts can be wrapped bidirectionally.
  • the step (3) using a cable tie to fix includes:
  • the yarn binding device is used to bind yarns bidirectionally outside the mica layer to form a bidirectional yarn binding layer.
  • the two-way yarn binding can fully guarantee the fixation of the mica layer, and can avoid the twisting of the twisting during the later twisting and cable forming process, which will cause the loosening of the yarn.
  • the softness and deformation of the yarn are better than that of the composite tape.
  • the yarn tying device includes a frame and a front yarn releasing tube and a rear yarn releasing tube respectively arranged at the front and rear ends of the worktable of the frame, and yarns are placed in the front yarn releasing tube and the rear yarn releasing tube.
  • the yarn binding direction of the front yarn feeding drum is opposite to the yarn binding direction of the rear yarn feeding drum. That is, if the front yarn delivery tube is coated with the mica layer counterclockwise, the rear yarn delivery tube is clockwise coated with the mica layer to form a two-way binding of the yarn to prevent back-twisting.
  • the yarn break alarm is used to remind the yarn, which is beneficial to improve Productivity.
  • the two-way binding yarn layer is a refractory yarn layer. Conducive to enhancing fire resistance.
  • the bidirectional binding yarn layer is made of glass fiber yarn or aramid yarn. It has certain fire resistance and good deformation ability.
  • the step (1) includes using an oxygen-free copper rod to draw a multi-stranded flexible conductor.
  • the insulating outer layer is an HDPE layer.
  • a twist-free twisting machine is used to twist the two fire-resistant cores together to form a twisted pair.
  • a twist-free twisting machine is used to twist a plurality of the twisted pairs together to form a multi-pair wire.
  • the use of twist-free twisting machine can avoid damage to the structure and stability of the refractory layer.
  • the present invention greatly improves production efficiency.
  • the use of hot-melt adhesive mica tapes and cable ties can ensure the stability of product processing and use, and ensure fire resistance.
  • the use of twist-free twisting machines can avoid damage to the refractory layer structure.
  • the fire-resistant cable produced can be used normally for a long time in a fire, ensuring the normal transmission and feedback of information, and the signal transmission of each insulated core in the fire is not easy to interfere with each other, which is very suitable for computer rooms, public places, etc. Cable equipment.

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  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)

Abstract

一种耐火电缆制作方法，包括以下步骤：导体制作：绞合导体；绝缘制作：在导体外挤包绝缘外层形成绝缘线芯；耐火制作：在绝缘线芯外纵包一内表面设有热熔胶的云母层后采用扎带固定，然后送入烘箱加热使云母层与绝缘外层、云母层重合处紧密粘合形成耐火线芯；对绞：将两根耐火线芯绞合在一起形成双绞线；成缆：将多个双绞线绞合在一起形成多绞线；编织：在多绞线外纵包一铝箔层后在铝箔层外编织一层编织层形成编织缆芯；挤护套：在编织缆芯外挤包一热塑性材料层。生产效率高、制作简便、成本节约，产出的电缆耐火性能、传输性能优异，抗干扰性好。

Description

一种耐火电缆制作方法 技术领域
本发明涉及电缆制作技术领域，尤其是一种耐火电缆制作方法。
 背景技术
随着科技的发展，信息交流量越来越大，布线系统越来越密集，再加上外界影响因素，电缆使用过程中会有遭遇火灾的情况，如果电缆在火焰情况下仍能维持一段时间正常供电，就能便于逃生、救援和为关键数据的备份争取时间，然而目前市场上大部分电缆都不具有耐火性，发生火灾时，线路立即短路，导致一些信息丢失或者不能及时反馈信息以及备份的情况发生，从而引起一系列的重大损失。
目前，也有部分企业和设计人员为了提高电缆的耐火性，确保电缆能在大火中长时间正常使用，保证信息的正常传输、反馈，公开号为CN105976904A的专利文献提供了“一种低烟无卤耐火隔热复合电力电缆的制作工艺”，包括以下步骤：a、制作电缆线芯，将圆形铜导体进行压紧处理，使得压紧后的导体外径缩小11%，然后 在压紧导体外挤包绝缘屏蔽复合层，制成电缆线芯备用；b、制作光缆单元，首先制作光纤松套管，光纤松套管内设有2-12芯光纤，将4-6根光纤 松套管围成一个圆圈，圆圈中心处设置加强件，然后在光纤松套管外包覆保护套制成光缆 单元，所述的保护套与松套管之间，松套管与加强件之间填充有阻水纱；c、制备隔热层：隔热层由如下重量份的材料制备而成：EVA： 20〜35份、LLDPE塑料：10〜 25份、AL(OH)3:45〜55份、Mg(OH)2:25〜40份、高分子助剂2-5份，胶粘剂5-10份；d、 产品组合：将光缆单元与电缆线芯一起挤包后进行成缆，在光缆单元与电缆线芯外依次挤包隔热层、耐火层、隔氧层、抗冲击层和外护套层。
又如公告号为CN101702343B的专利文献提供了“一种耐火电缆的制作方法”，包括如下步骤：步骤一、绞合导体；步骤二、在导体的外层绕包云母层；步骤三、在云母层外再挤包硅橡胶绝缘层；步骤四、在硅橡胶绝缘层外纵包金属内护层并沿纵向焊缝；步骤五、并列配置多个由步骤四形成的缆芯，然后在间隙处填充云母绳，并且在步骤四形成的缆芯纵包金属外护层并沿纵向焊缝；步骤六、检验。该耐火电缆采用内、外金属铜护层，增强了耐火及机械防护性能。在绝缘设计上考虑耐温要求、耐火要求和耐电压要求，采用两层云母重叠绕包，然后挤包硅橡胶绝缘层，具有较好的电性能、耐热性能、及耐火性能。但上述方法限制了导体的直径往更加细小的发展，当导体较细时，所能使用的云母层宽度相对较窄，采用绕包的方式固定云母，为了较完美的包覆导体，势必导致生产速度大大降低，工期拉长，不能大批量的生产导致制作成本增加，耐火性、数据传输性好但市场推广率低，而且为了保证耐火性能，绕包必须完整、充分地绕包导体，这就对绕包设备的精度提出了更高的要求；硅橡胶绝缘层挤包在云母层外，较为容易损坏，增加了数据传输干扰，金属内、外护层的设置增加了制造技术难度、成本，一定程度上也限制了线缆的形变能力。
另外采用绕包的方式固定云母层，对有些数据传输型电缆后续的对绞加工过程也产生了影响，对绞时，对绞方向会出现与云母层绕包方向相反的情况，容易发生退扭，导致云母层松动，进而导致耐火性降低。
 技术问题
本发明要解决的技术问题是针对上述现有技术的不足，提供一种耐火防护性好、生产效率高、制作简便以及成本节约的耐火电缆制作方法。
 技术解决方案
为了实现上述目的，本发明采用的技术方案为：
一种耐火电缆制作方法，包括以下步骤：
（1）导体制作：绞合导体；
（2）绝缘制作：在所述导体外挤包绝缘外层形成绝缘线芯；
（3）耐火制作：在所述绝缘线芯外纵包一内表面设有热熔胶的云母层后采用扎带固定，然后送入烘箱加热使所述云母层与所述绝缘外层、所述云母层重合处紧密粘合形成耐火线芯；
（4）对绞：将两根所述耐火线芯绞合在一起形成双绞线；
（5）成缆：将多个所述双绞线绞合在一起形成多绞线；
（6）编织：在所述多绞线外纵包一铝箔层后在所述铝箔层外编织一层编织层形成编织缆芯；
（7）挤护套：在所述编织缆芯外挤包一热塑性材料层。
进一步地，所述步骤（3）中所述采用扎带固定包括：
在所述云母层外绕包耐火复合带。
进一步地，所述步骤（3）中所述采用扎带固定包括：
利用扎纱装置在所述云母层外双向扎纱形成一双向扎纱层。
进一步地，所述扎纱装置包括：机架以及分别设于机架工作台面的前、后端的前放纱筒和后放纱筒，所述前放纱筒和所述后放纱筒内均放置有纱团和断纱报警器，所述前放纱筒的扎纱方向与所述后放纱筒的扎纱方向相反。
进一步地，所述双向扎纱层为耐火纱层。
进一步地，所述双向扎纱层采用玻璃纤维纱或芳纶纱制成。
进一步地，所述步骤（1）包括采用无氧铜杆拉制成多股绞合软导体。
进一步地，所述步骤（2）中所述绝缘外层为HDPE层。
进一步地，所述步骤（4）中采用无扭对绞机将两根所述耐火线芯绞合在一起形成双绞线。
进一步地，所述步骤（5）中采用无扭对绞机将多个所述双绞线绞合在一起形成多绞线。
 有益效果
采用上述技术方案后，本发明的有益效果是：制作过程简单且生产效率高，品质有保障，成本低，耐火性能优异，生产的电缆能在大火中长时间正常使用，保证信息的正常传输、反馈，而且各个绝缘线芯在火灾中的信号传输不易相互干扰，十分适用于机房、公共场所的等电缆配备。
 本发明的实施方式
以下是本发明的具体实施例，对本发明的技术方案作进一步的描述，但本发明并不限于这些实施例。
本实施例提供一种耐火电缆制作方法，包括以下步骤：
（1）导体制作：绞合导体；
（2）绝缘制作：在所述导体外挤包绝缘外层形成绝缘线芯；
（3）耐火制作：在所述绝缘线芯外纵包一内表面设有热熔胶的云母层后采用扎带固定，然后送入烘箱加热使所述云母层与所述绝缘外层、所述云母层重合处紧密粘合形成耐火线芯；云母层选用常规使用的云母带即可，其宽度根据其包覆的导体直径设置，一般设置成其宽度略大于导体的圆周周长，进而使得云母层重合处能够通过热熔胶直接紧密粘合固定，确保包裹效果和包裹效率；
（4）对绞：将两根所述耐火线芯绞合在一起形成双绞线；
（5）成缆：将多个所述双绞线绞合在一起形成多绞线；一般线缆选择四个所述双绞线进行绞合即可；
（6）编织：在所述多绞线外纵包一铝箔层后在所述铝箔层外编织一层编织层形成编织缆芯；铝箔层即能防止数据传输干扰，又能增加耐火性，编织层用于铝箔层包覆固定；
（7）挤护套：在所述编织缆芯外挤包一热塑性材料层，形成最外部护套，至此，耐火电缆制作完毕，可以用于公共场所以及机房等。
在多年的制造经验积累中，形成了上述生产方便、高效的耐火电缆制作方法，生产出的耐火电缆具有较高耐热、耐火性，上述方案中，先挤包绝缘外层后纵包云母层，一方面是有利于云母层通过热熔胶与绝缘外层较完美的贴合，确保较高的耐火性，同时，云母层保护的不仅仅是导体，还有绝缘外层，这有利于保障单芯线的数据传输不受其他单芯线干扰，延长了火灾中该耐火线缆的数据传输、供电等的时长；此外，云母层采用纵包的方法与绝缘线芯组合并通过热熔胶和扎带完成固定，相比于传统绕包方法，除了能够较大地提高包裹效率，且适用于较细导体的耐火性防护外，其包裹性能更好，更加能够抵抗后期线缆生产过程中的绞合过程和使用过程中的扭转，不会出现退扭导致的云母层松弛，包裹性降低的现象，大大提高了线缆的耐火性能，且制作简单、能够大批量生产、成本节约、有利于市场推广，火灾中的数据传输有效时长有保障，能够为火灾中保持较长时间的供电、提供数据备份做出贡献。
为了进一步增强的包裹效果，所述步骤（3）中所述采用扎带固定包括：
在所述云母层外绕包耐火复合带。耐火复合带即选用现有技术中的电缆线中常会使用的即可，如公告号为CN102681115B的专利文献提供的光缆耐火隔热带，又如公告号为CN205194357U的专利文献提供的耐火云母带等等，一方面能够在热熔胶固定的基础上进一步增加耐火复合带对云母层的绕包固定，确保云母层包覆的结构稳定性，另一方面还能够增加一定的耐火性能，延长火灾中的工作寿命。绕包时，可绕包单根耐火复合带，也可双向绕包两根耐火复合带。
或者可选地，为了进一步增强的包裹效果，所述步骤（3）中所述采用扎带固定包括：
利用扎纱装置在所述云母层外双向扎纱形成一双向扎纱层。
双向扎纱能够充分保障云母层的固定，可避免后期对绞、成缆过程中绞合发生退扭，导致的扎纱松弛，且纱的柔软、形变程度相比与复合带更佳，更能够充分的包裹紧云母层。
所述扎纱装置包括：机架以及分别设于机架工作台面的前、后端的前放纱筒和后放纱筒，所述前放纱筒和所述后放纱筒内均放置有纱团和断纱报警器，所述前放纱筒的扎纱方向与所述后放纱筒的扎纱方向相反。即前放纱筒若采用逆时针包覆云母层，则后放纱筒采用顺时针包覆云母层，形成双向扎纱固定，可防止退扭，断纱报警器用于断纱提醒，有利于提高生产效率。
所述双向扎纱层为耐火纱层。有利于增强耐火性能。
所述双向扎纱层采用玻璃纤维纱或芳纶纱制成。具有一定的耐火性能，且形变能力好。
所述步骤（1）包括采用无氧铜杆拉制成多股绞合软导体。
所述步骤（2）中所述绝缘外层为HDPE层。
所述步骤（4）中采用无扭对绞机将两根所述耐火线芯绞合在一起形成双绞线。
所述步骤（5）中采用无扭对绞机将多个所述双绞线绞合在一起形成多绞线。使用无扭对绞机，可避免破坏耐火层结构和稳定性能。
综上设计，本发明极大提高了生产效率，使用热熔胶云母带以及扎带，可保证产品加工和使用的稳定性，保障耐火性，使用无扭对绞机，能够避免破坏耐火层结构和稳定性能，生产出的耐火电缆能在大火中长时间正常使用，保证信息的正常传输、反馈，而且各个绝缘线芯在火灾中的信号传输不易相互干扰，十分适用于机房、公共场所的等电缆配备。
本文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。

Claims (10)

  1. 一种耐火电缆制作方法，其特性在于，包括以下步骤：
    （1）导体制作：绞合导体；
    （2）绝缘制作：在所述导体外挤包绝缘外层形成绝缘线芯；
    （3）耐火制作：在所述绝缘线芯外纵包一内表面设有热熔胶的云母层后采用扎带固定，然后送入烘箱加热使所述云母层与所述绝缘外层、所述云母层重合处紧密粘合形成耐火线芯；
    （4）对绞：将两根所述耐火线芯绞合在一起形成双绞线；
    （5）成缆：将多个所述双绞线绞合在一起形成多绞线；
    （6）编织：在所述多绞线外纵包一铝箔层后在所述铝箔层外编织一层编织层形成编织缆芯；
    （7）挤护套：在所述编织缆芯外挤包一热塑性材料层。
  2. 根据权利要求1所述的一种耐火电缆制作方法，其特性在于，所述步骤（3）中所述采用扎带固定包括：
    在所述云母层外绕包耐火复合带。
  3. 根据权利要求1所述的一种耐火电缆制作方法，其特性在于，所述步骤（3）中所述采用扎带固定包括：
    利用扎纱装置在所述云母层外双向扎纱形成一双向扎纱层。
  4. 根据权利要求3所述的一种耐火电缆制作方法，其特性在于，所述扎纱装置包括：机架以及分别设于机架工作台面的前、后端的前放纱筒和后放纱筒，所述前放纱筒和所述后放纱筒内均放置有纱团和断纱报警器，所述前放纱筒的扎纱方向与所述后放纱筒的扎纱方向相反。
  5. 根据权利要求3所述的一种耐火电缆制作方法，其特性在于，所述双向扎纱层为耐火纱层。
  6. 根据权利要求3所述的一种耐火电缆制作方法，其特性在于，所述双向扎纱层采用玻璃纤维纱或芳纶纱制成。
  7. 根据权利要求1所述的一种耐火电缆制作方法，其特性在于，所述步骤（1）包括采用无氧铜杆拉制成多股绞合软导体。
  8. 根据权利要求1所述的一种耐火电缆制作方法，其特性在于，所述步骤（2）中所述绝缘外层为HDPE层。
  9. 根据权利要求1所述的一种耐火电缆制作方法，其特性在于，所述步骤（4）中采用无扭对绞机将两根所述耐火线芯绞合在一起形成双绞线。
  10. 根据权利要求1所述的一种耐火电缆制作方法，其特性在于，所述步骤（5）中采用无扭对绞机将多个所述双绞线绞合在一起形成多绞线。
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Publication number Priority date Publication date Assignee Title
CN110993192A (zh) * 2019-12-17 2020-04-10 浙江正导电缆有限公司 一种耐火电缆制作方法
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08287737A (ja) * 1995-04-17 1996-11-01 Yazaki Corp 耐火電線
CN200959252Y (zh) * 2006-09-29 2007-10-10 江苏东强股份有限公司 低烟低卤轻轨道通信电缆
CN101447252A (zh) * 2008-12-26 2009-06-03 宝胜科技创新股份有限公司 新型耐火电缆
CN202549405U (zh) * 2012-03-30 2012-11-21 安徽华源电缆集团有限公司 耐高温型计算机用电缆
CN105383993A (zh) * 2015-11-23 2016-03-09 中国电子科技集团公司第八研究所 光缆高速扎纱装置
CN105427921A (zh) * 2015-12-22 2016-03-23 广东中德电缆有限公司 耐高温耐高电压电缆
CN108565046A (zh) * 2018-06-13 2018-09-21 南京全信传输科技股份有限公司 耐火数据总线制备工艺及电缆
CN110993192A (zh) * 2019-12-17 2020-04-10 浙江正导电缆有限公司 一种耐火电缆制作方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08287737A (ja) * 1995-04-17 1996-11-01 Yazaki Corp 耐火電線
CN200959252Y (zh) * 2006-09-29 2007-10-10 江苏东强股份有限公司 低烟低卤轻轨道通信电缆
CN101447252A (zh) * 2008-12-26 2009-06-03 宝胜科技创新股份有限公司 新型耐火电缆
CN202549405U (zh) * 2012-03-30 2012-11-21 安徽华源电缆集团有限公司 耐高温型计算机用电缆
CN105383993A (zh) * 2015-11-23 2016-03-09 中国电子科技集团公司第八研究所 光缆高速扎纱装置
CN105427921A (zh) * 2015-12-22 2016-03-23 广东中德电缆有限公司 耐高温耐高电压电缆
CN108565046A (zh) * 2018-06-13 2018-09-21 南京全信传输科技股份有限公司 耐火数据总线制备工艺及电缆
CN110993192A (zh) * 2019-12-17 2020-04-10 浙江正导电缆有限公司 一种耐火电缆制作方法

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