High temperature resistant fireproof communication cable
Patent Information
- Application Number
- CN202521970656.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-14
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-09-14
AI Technical Summary
[0003]在传统通信线缆设计中，普通聚乙烯和聚氯乙烯材料因其良好的绝缘性能和成本优势而被广泛使用，然而，这些材料在高温环境下的表现并不理想：普通PE材料的工作温度通常不超过70-90℃，PVC材料在高温下不仅容易软化、老化，还会释放大量有毒烟雾和腐蚀性气体；高温防护方面，常规耐高温电缆多采用硅橡胶、氟塑料等材料作为绝缘层，硅橡胶通常可长期工作在180-200℃温度范围，氟塑料如聚四氟乙烯可耐受260℃以上高温，但这些材料在遭遇明火或更高温度时，仍然可能发生分解或碳化，失去绝缘性能
[0014]1.本实用新型导体采用单根直径0.65mm铜丝绞成缆芯，保障传输载体基础稳定性；第一层绝缘为PE材料，避免普通PE信号易损耗问题，确保常温下信号传输稳定；第二层绝缘采用加成型耐高温硅橡胶，可耐受200℃高温不损坏；外侧两层防火玻纤布能在400℃环境下保护线缆，相较传统硅橡胶遇明火易分解、PVC高温释放毒气的不足，大幅提升高温绝缘稳定性与防火屏障效果，保障极端环境下线缆正常工作。
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Figure CN224803620U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of communication cables, and in particular to a high-temperature resistant and fireproof communication cable. Background Technology
[0002] As the cornerstone of modern information transmission, communication cables are widely used in various fields of national economy and national defense construction. With the rapid development of technologies such as 5G, Internet of Things, and Industrial Internet, communication cables not only need to ensure the stability and reliability of signal transmission, but also face severe challenges in various complex and harsh environments, especially the safe operation in high-temperature environments and high fire risk scenarios.
[0003] In traditional communication cable design, ordinary polyethylene and polyvinyl chloride materials are widely used due to their good insulation properties and cost advantages. However, these materials do not perform well in high-temperature environments: the working temperature of ordinary PE materials is usually no more than 70-90℃, and PVC materials are not only prone to softening and aging at high temperatures, but also release a large amount of toxic fumes and corrosive gases. In terms of high-temperature protection, conventional high-temperature resistant cables mostly use materials such as silicone rubber and fluoroplastics as insulation layers. Silicone rubber can usually work in the temperature range of 180-200℃ for a long time, and fluoroplastics such as polytetrafluoroethylene can withstand temperatures above 260℃. However, these materials may still decompose or carbonize and lose their insulation properties when exposed to open flames or higher temperatures.
[0004] In summary, existing communication cable technology still has many shortcomings in dealing with high-temperature and high-fire-risk environments. There is an urgent need to develop a new type of high-temperature and fire-resistant communication cable that can balance normal-temperature signal transmission performance, high-temperature insulation stability, and effective fire protection to meet the increasingly demanding application requirements of modern communication systems. Utility Model Content
[0005] To ensure the normal operation of cables and the stability of signal transmission in extreme environments, and to improve the safe operation capability in complex and harsh environments, this application provides a high-temperature resistant and fireproof communication cable.
[0006] This application provides a high-temperature resistant and fireproof communication cable, which adopts the following technical solution: It includes conductors, wherein multiple conductors are stranded into a cable core, and each conductor is a single copper wire with a diameter of 0.65mm; a first insulation layer and a second insulation layer are sequentially arranged on the conductors from the inside to the outside; a fireproof wrapping layer is provided outside the second insulation layer, the fireproof wrapping layer being made of fireproof fiberglass cloth; a shielding layer is provided outside the fireproof wrapping layer, and a sheath layer is provided outside the shielding layer, the sheath layer comprising low-smoke halogen-free insulation material.
[0007] Optionally, the first insulating layer is made of PE material, and the second insulating layer is made of silicone material.
[0008] Optionally, the fireproof fiberglass cloth is configured as two layers, with the inner layer being alkali-free fiberglass tape and the outer layer being intumescent fireproof fiberglass cloth.
[0009] Optionally, the shielding layer includes copper-faced aluminum foil and braided copper wire, wherein the copper-faced aluminum foil and the braided copper wire are sequentially wrapped around the fireproof wrapping layer from the inside out.
[0010] Optionally, the sheath layer further includes aramid fiber braid and aluminum-plastic composite tape, wherein the aramid fiber braid and the aluminum-plastic composite tape are disposed inside the low-smoke halogen-free insulating material and are arranged sequentially from the outside to the inside.
[0011] Optionally, the PE material is modified high-density polyethylene with 0.5%-1% antioxidant added by mass; the silicone material is addition-cured high-temperature resistant silicone rubber.
[0012] Optionally, the copper-faced aluminum foil is a single-sided copper-plated aluminum foil substrate, and a longitudinal wrapping process is adopted during wrapping. The overlap width is 15%-20% of the width of the copper-faced aluminum foil, and the overlap is bonded with conductive adhesive to ensure shielding continuity; the braided copper wire is a tin-plated soft copper wire.
[0013] In summary, this application includes the following beneficial technical effects:
[0014] 1. The conductor of this utility model uses a single copper wire with a diameter of 0.65mm twisted into a cable core to ensure the basic stability of the transmission carrier; the first layer of insulation is made of PE material, avoiding the problem of easy loss of ordinary PE signals and ensuring stable signal transmission at room temperature; the second layer of insulation uses addition-cured high-temperature resistant silicone rubber, which can withstand high temperatures of 200℃ without damage; the two outer layers of fireproof fiberglass cloth can protect the cable in an environment of 400℃. Compared with the shortcomings of traditional silicone rubber, which is easy to decompose when exposed to open flame and PVC, which releases toxic gases at high temperatures, this significantly improves the high-temperature insulation stability and fire barrier effect, ensuring the normal operation of the cable in extreme environments.
[0015] 2. The shielding layer of this utility model adopts single-sided copper-plated aluminum foil and tin-plated soft copper wire braiding to ensure shielding continuity, effectively isolate electromagnetic interference, avoid signal transmission being affected by external factors, and solve the problem of weak anti-interference ability of traditional cables; the sheath layer is mainly composed of low-smoke halogen-free insulation material, combined with aramid fiber braiding and aluminum-plastic composite tape, avoiding the hazards of toxic fumes released by traditional PVC at high temperatures, reducing damage to personnel and equipment in case of fire, ensuring signal transmission stability, and improving safe operation capability in complex and harsh environments. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application;
[0017] Figure 2 This is a cross-sectional view of an embodiment of this application;
[0018] Figure 3 This is a schematic diagram of the fireproof wrapping layer in an embodiment of this application;
[0019] Figure 4 This is a schematic diagram of the sheath layer in an embodiment of this application.
[0020] Reference numerals: 1. Conductor; 101. Copper wire; 2. First insulation layer; 201. PE material; 3. Second insulation layer; 301. Silicone material; 4. Fireproof wrapping layer; 401. Alkali-free fiberglass tape; 402. Expandable fireproof fiberglass cloth; 5. Shielding layer; 501. Copper-faced aluminum foil; 502. Braided copper wire; 6. Sheath layer; 601. Low-smoke halogen-free insulation material; 602. Aramid fiber braid; 603. Aluminum-plastic composite tape; 7. Grounding wire. Detailed Implementation
[0021] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.
[0022] This application discloses a high-temperature resistant and fireproof communication cable. For example... Figure 1 , Figure 2 As shown, it includes a conductor 1, which is configured as multiple conductors, and the multiple conductors 1 are twisted into a cable core. The conductor 1 is a single copper wire 101 with a diameter of 0.65mm. The conductor 1 is provided with a first insulation layer 2 and a second insulation layer 3 from the inside to the outside. The first insulation layer 2 is made of PE material 201, and the second insulation layer 3 is made of silicone material 301. The PE material 201 is modified high-density polyethylene with 0.5%-1% antioxidant added by mass.
[0023] See Figure 2 , Figure 3 As shown, the silicone material 301 is addition-cured high-temperature resistant silicone rubber; a fireproof wrapping layer 4 is provided on the outside of the second insulating layer 3. The fireproof wrapping layer 4 is made of fireproof fiberglass cloth, which is set in two layers. The inner layer of the fireproof fiberglass cloth is alkali-free fiberglass tape 401, and the outer layer of the fireproof fiberglass cloth is expanded fireproof fiberglass cloth 402; a shielding layer 5 is provided on the outside of the fireproof wrapping layer 4. The shielding layer 5 includes copper-faced aluminum foil 501 and braided copper wire 502.
[0024] See Figure 1 , Figure 2As shown, copper-faced aluminum foil 501 and braided copper wire 502 are wrapped around the fireproof wrapping layer 4 from the inside out. The copper-faced aluminum foil 501 is a single-sided copper-plated aluminum foil substrate. The wrapping process adopts a longitudinal wrapping process, and the overlap width is 15%-20% of the width of the copper-faced aluminum foil 501. The overlap is bonded with conductive adhesive to ensure the continuity of shielding. The braided copper wire 502 is a tin-plated soft copper wire. A grounding wire 7 is provided between the copper-faced aluminum foil 501 and the braided copper wire 502. A sheath layer 6 is provided on the outside of the shielding layer 5.
[0025] See Figure 2 , Figure 4 As shown, the sheath layer 6 includes a low-smoke halogen-free insulating material 601, which is of Class B1. The sheath layer 6 also includes aramid fiber braid 602 and aluminum-plastic composite tape 603. The aramid fiber braid 602 and the aluminum-plastic composite tape 603 are arranged inside the low-smoke halogen-free insulating material 601, and are arranged sequentially from the outside to the inside.
[0026] The implementation principle of a high-temperature fireproof communication cable in this application embodiment is as follows: multiple single-stranded 0.65mm straight copper wires 101 are stranded to form the core structure of conductor 1, which further improves the structural stability and tensile strength of the core, providing a stable and reliable core carrier for the signal transmission of the entire cable and ensuring the basic integrity of the signal transmission path.
[0027] A first insulating layer 2 is uniformly wrapped around the outside of conductor 1. This insulating layer is made of modified high-density polyethylene with 0.5%-1% antioxidant by mass. The modified PE material 201 not only retains excellent insulation performance, but also improves aging resistance through antioxidants, which can effectively block signal crosstalk between conductors 1 and signal interference between conductor 1 and the external environment.
[0028] A second insulation layer 3 is continuously wrapped around the outside of the first insulation layer 2. This layer is made of addition-cured high-temperature resistant silicone rubber. Addition-cured high-temperature resistant silicone rubber has excellent high-temperature resistance characteristics and can work for a long time in a high-temperature environment of 200℃ without softening, aging or damage to insulation performance. This ensures that the cable can maintain stable insulation function under medium and high temperature conditions and ensures that the signal transmission path is not interrupted.
[0029] A fireproof wrapping layer 4 is wrapped around the outside of the second insulation layer 3. This wrapping layer has a double-layer structure. The inner layer is an alkali-free glass fiber tape 401, and the outer layer is an intumescent fireproof glass fiber cloth 402. When the ambient temperature reaches 400℃, the inner alkali-free glass fiber tape 401 can maintain the strength of the basic structure, and the outer intumescent fireproof glass fiber cloth 402 will expand to form a dense fireproof and heat-insulating layer when exposed to high temperature. The double-layer structure works together to build an effective fire barrier, preventing damage to the conductor 1 and insulation layer inside the cable due to high temperature, while also isolating the cable core from direct burning by external open flames.
[0030] A single-sided copper-plated aluminum foil substrate 501 is wrapped using a longitudinal wrapping process. During longitudinal wrapping, the overlap width is strictly controlled to be 15%-20% of the aluminum foil width, and conductive adhesive is used to bond the overlap to ensure the continuity of the shielding layer 5 and avoid shielding gaps caused by discontinuous overlaps. Tin-plated soft copper wire 502 is braided on the outside of the aluminum foil to form a double shielding structure of "copper-faced aluminum foil + braided copper wire". This structure can effectively absorb and reflect external electromagnetic signals and isolate the influence of electromagnetic interference on the internal transmission signals of the cable.
[0031] The sheath layer 6 is mainly composed of B1-grade low-smoke halogen-free insulation material 601, with aramid fiber braid 602 and aluminum-plastic composite tape 603 sequentially laminated from the outside to the inside. The aluminum-plastic composite tape 603 can prevent external moisture and corrosive gases from penetrating into the cable, playing a role in moisture protection and corrosion prevention. The aramid fiber braid 602 enhances the tensile and abrasion resistance of the sheath layer 6 with its high strength characteristics, resisting damage to the cable from external mechanical impacts. The B1-grade low-smoke halogen-free insulation material 601 has excellent fire-retardant properties, can achieve 40 minutes of burning without spreading, and does not release toxic fumes or corrosive gases when burning, ensuring the safe operation and signal transmission stability of the cable in complex and harsh environments such as humidity, mechanical impact, and the initial stage of fire.
[0032] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A high-temperature resistant and fireproof communication cable, comprising a conductor (1), characterized in that: The conductor (1) is configured as multiple strands, and the multiple conductors (1) are twisted into a cable core. The conductor (1) is a single copper wire (101) with a diameter of 0.65mm. The conductor (1) is provided with a first insulation layer (2) and a second insulation layer (3) from the inside to the outside. A fireproof wrapping layer (4) is provided on the outside of the second insulation layer (3). The fireproof wrapping layer (4) is made of fireproof fiberglass cloth. A shielding layer (5) is provided on the outside of the fireproof wrapping layer (4). A sheath layer (6) is provided on the outside of the shielding layer (5). The sheath layer (6) includes a low-smoke halogen-free insulating material (601).
2. The high-temperature resistant and fireproof communication cable according to claim 1, characterized in that: The first insulating layer (2) is made of PE material (201), and the second insulating layer (3) is made of silicone material (301).
3. The high-temperature resistant and fireproof communication cable according to claim 1, characterized in that: The fireproof fiberglass cloth is configured with two layers, the inner layer of which is an alkali-free fiberglass tape (401), and the outer layer of which is an expanded fireproof fiberglass cloth (402).
4. The high-temperature resistant and fireproof communication cable according to claim 1, characterized in that: The shielding layer (5) includes a copper-faced aluminum foil (501) and a braided copper wire (502), which are wrapped around the fireproof wrapping layer (4) from the inside to the outside.
5. The high-temperature resistant and fireproof communication cable according to claim 1, characterized in that: The sheath layer (6) also includes aramid fiber braid (602) and aluminum-plastic composite tape (603). The aramid fiber braid (602) and the aluminum-plastic composite tape (603) are arranged inside the low-smoke halogen-free insulating material (601) and arranged sequentially from the outside to the inside.
6. The high-temperature resistant and fireproof communication cable according to claim 4, characterized in that: The copper-plated aluminum foil (501) is a single-sided copper-plated aluminum foil substrate. When wrapping, a longitudinal wrapping process is adopted, and the overlap width is 15%-20% of the width of the copper-plated aluminum foil (501). The overlap is bonded with conductive adhesive to ensure shielding continuity. The braided copper wire (502) is a tin-plated soft copper wire.