Impact resistant fire resistant cable
Patent Information
- Application Number
- CN202522190936.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-16
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-10-16
AI Technical Summary
[0004]针对现有技术的不足，本实用新型提供了一种抗冲击防火电缆，解决了现有技术中部分防火电缆存在抗冲击性能不足、柔性支撑欠缺、散热性能较弱等问题
本实用新型提供一种抗冲击防火电缆，包含一中心柔性芯、4根线缆、4根缓冲筋、一阻燃填充层、一绕包带层、一屏蔽层、一带孔缓冲层、一阻燃层、一隔热层、一防火层、一外护套层以及一耐磨层。中心柔性芯包含中心圆形杆和包绕其外的四边形柔性外包层，四边形柔性外包层的四个尖端分别连接缓冲筋，缓冲筋远离外包层的一侧设置有弧形件，缓冲筋与弧形件的配合可对相邻两缓冲筋之间的阻燃填充层起到限位作用，使阻燃填充层在电缆内部保持稳定分布，防止因外力出现较大移位，从而保证电缆整体更加整圆、紧凑，进一步提升了电缆的结构稳定性、抗压性能以及康冲击性能；而四边形柔性外包层的四边向内凹陷形成半圆形容纳部，4根线缆分别嵌入其中，避免导体位移造成局部受力集中，从而提高整体结构的稳定性，也一定程度提升了电缆的抗冲击性能。电缆外部依次设置的绕包带层、屏蔽层、带孔缓冲层、阻燃层、隔热层、防火层、外护套层及耐磨层形成了多层防护体系。其中，阻燃填充层、阻燃层、隔热层与防火层协同配合构建出高效的阻燃与防火屏障，可在高温或火灾环境下有效延缓火势蔓延，保持线路的完整性与传输稳定性；屏蔽层则能够有效降低外部电磁干扰，提高电缆信号传输的可靠性；带孔缓冲层能够在电缆受外力冲击或弯曲时有效吸收机械应力和形变能量，起到缓冲吸能与减震保护作用，从而进一步提升电缆的抗冲击性能和柔韧性。而外护套层与耐磨层的配合增强了电缆的抗磨损和抗腐蚀能力，使其能够在高强度、复杂环境中长期稳定运行。因此，该抗冲击防火电缆不仅在抗压、抗冲击和防火性能等方面表现突出，还兼具优良的柔性与耐久性，可显著延长电缆的使用寿命。
Smart Images
Figure CN224773610U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cable technology, specifically to an impact-resistant and fire-resistant cable. Background Technology
[0002] Currently, fire-resistant cables are widely used in buildings, tunnels, subways, power plants, and petrochemical plants to maintain the integrity of the wiring and the function of electrical transmission even in extreme environments such as fires. With economic development, the applications of fire-resistant cables have become more diverse, leading to stricter and more varied requirements for their performance indicators. These requirements include stringent demands on impact resistance, flexible support, operating temperature, and flame retardancy. Continuously improving the overall performance of fire-resistant cables is an urgent need for economic and social development.
[0003] In view of the problems of insufficient impact resistance, lack of flexible support and weak heat dissipation of traditional fire-resistant cables, it is necessary to provide a cable with both impact resistance and fire resistance to improve the safety, reliability and service life of cables under complex working conditions. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides an impact-resistant fireproof cable, which solves the problems of insufficient impact resistance, lack of flexible support, and weak heat dissipation performance in some existing fireproof cables.
[0005] An impact-resistant fireproof cable comprises a central flexible core, four cables, four buffer ribs, a flame-retardant filling layer, a wrapping tape layer, a shielding layer, a perforated buffer layer, a flame-retardant layer, a heat insulation layer, a fireproof layer, an outer sheath layer, and a wear-resistant layer. The central flexible core includes a central circular rod and a quadrilateral flexible outer sheath surrounding the central circular rod. Each of the four sides of the quadrilateral flexible outer sheath is recessed towards the central circular rod, providing a semi-circular receiving portion. The four tips of the quadrilateral flexible outer sheath are respectively connected to… A buffer rib is provided, and an arc-shaped component is provided on the side of the buffer rib away from the quadrilateral flexible outer sheath. The four cables are respectively attached to the semi-circular receiving part of the quadrilateral flexible outer sheath. The central flexible core and the outer side of the cable are sequentially wrapped from the inside to the outside with the wrapping tape layer, the shielding layer, the perforated buffer layer, the flame retardant layer, the heat insulation layer, the fireproof layer, the outer sheath layer, and the wear-resistant layer. The flame retardant filling layer is filled in the gaps in the wrapping tape layer.
[0006] Preferably, the central circular rod is a high-toughness thermoplastic central circular rod or a nylon central circular rod, and the quadrilateral flexible outer layer is a silicone rubber quadrilateral flexible outer layer, a thermoplastic elastomer quadrilateral flexible outer layer, or a polyvinyl chloride quadrilateral flexible outer layer.
[0007] Preferably, the flame-retardant filler layer is a magnesium hydroxide flame-retardant filler layer or an aluminum hydroxide flame-retardant filler layer doped with alumina particles.
[0008] Preferably, the wrapping tape layer is a polyester nonwoven tape, a glass fiber tape, or an aramid fiber tape.
[0009] Furthermore, the shielding layer is a metal woven mesh layer, a metal foil layer, or a composite layer of metal foil and woven mesh, with a coverage density greater than 80%.
[0010] Furthermore, the perforated buffer layer is a rubber perforated buffer layer, and the perforated buffer layer has a plurality of holes with a diameter of 0.1~0.5cm evenly distributed in a ring on it.
[0011] Preferably, the flame-retardant layer is a ceramicized silicone rubber flame-retardant layer or a mica tape flame-retardant layer.
[0012] Preferably, the insulation layer is an aerogel composite material insulation layer, a ceramic fiber insulation layer, or a glass fiber insulation layer.
[0013] Preferably, the fireproof layer is a multi-layered mica tape fireproof layer or a phenolic FRP fireproof layer.
[0014] Preferably, the outer sheath is a polycarbonate plastic outer sheath with flame-retardant polyurethane foam adhesive on the outside.
[0015] Compared with the prior art, the present invention has the following beneficial effects: This utility model provides an impact-resistant fireproof cable, comprising a central flexible core, four cables, four buffer ribs, a flame-retardant filling layer, a wrapping tape layer, a shielding layer, a perforated buffer layer, a flame-retardant layer, a heat insulation layer, a fireproof layer, an outer sheath layer, and a wear-resistant layer. The central flexible core includes a central circular rod and a quadrilateral flexible outer sheath surrounding it. The four tips of the quadrilateral flexible outer sheath are connected to buffer ribs. An arc-shaped component is provided on the side of the buffer rib furthest from the outer sheath. The cooperation between the buffer rib and the arc-shaped component limits the flame-retardant filling layer between adjacent buffer ribs, ensuring a stable distribution of the flame-retardant filling layer within the cable and preventing significant displacement due to external forces. This ensures the cable is more rounded and compact, further improving its structural stability, compressive strength, and impact resistance. The four sides of the quadrilateral flexible outer sheath are recessed inward to form a semi-circular receiving portion, into which the four cables are embedded, preventing conductor displacement and localized stress concentration, thereby improving the overall structural stability and enhancing the cable's impact resistance to a certain extent. The cable's exterior is constructed with a multi-layered protective system consisting of a wrapping tape layer, a shielding layer, a perforated buffer layer, a flame-retardant layer, a heat insulation layer, a fireproof layer, an outer sheath layer, and an abrasion-resistant layer. The flame-retardant filling layer, flame-retardant layer, heat insulation layer, and fireproof layer work together to create a highly efficient flame-retardant and fireproof barrier, effectively slowing the spread of fire in high-temperature or fire environments and maintaining the integrity and transmission stability of the line. The shielding layer effectively reduces external electromagnetic interference, improving the reliability of cable signal transmission. The perforated buffer layer effectively absorbs mechanical stress and deformation energy when the cable is subjected to external impact or bending, providing buffering, energy absorption, and shock absorption protection, thereby further enhancing the cable's impact resistance and flexibility. The combination of the outer sheath layer and the abrasion-resistant layer enhances the cable's wear and corrosion resistance, enabling long-term stable operation in high-intensity, complex environments. Therefore, this impact-resistant fire-resistant cable not only excels in pressure resistance, impact resistance, and fire resistance but also possesses excellent flexibility and durability, significantly extending its service life. Attached Figure Description
[0016] Figure 1 This is a structural schematic diagram of the impact-resistant fireproof cable described in this utility model.
[0017] in: 10-Central flexible core, 20-Cable, 30-Buffer rib, 40-Flame-retardant filling layer, 50-Wrapping tape layer, 60-Shielding layer, 70-Perforated buffer layer, 80-Flame-retardant layer, 90-Heat insulation layer, 91-Fireproof layer, 92-Outer sheath layer, 93-Abrasion-resistant layer, 11-Central circular rod, 12-Quadrilateral flexible outer sheath, 13-Semi-circular receiving part, 14-Arc-shaped component. Detailed Implementation
[0018] The embodiments described below are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0019] See Figure 1 This embodiment provides an impact-resistant fireproof cable, which includes a central flexible core 10, four cables 20, four buffer ribs 30, a flame-retardant filling layer 40, a wrapping tape layer 50, a shielding layer 60, a perforated buffer layer 70, a flame-retardant layer 80, a heat insulation layer 90, a fireproof layer 91, an outer sheath layer 92, and a wear-resistant layer 93. The central flexible core 10 includes a central circular rod 11 and a quadrilateral flexible outer sheath 12 wrapped around the central circular rod 11. Each of the four sides of the quadrilateral flexible outer sheath 12 is recessed towards the central circular rod 11 and has a semi-circular receiving portion 13. The four tips of the quadrilateral flexible outer sheath 12 are... Each of the four cables 20 is connected to a buffer rib 30. An arc-shaped component 14 is provided on the side of the buffer rib 30 away from the quadrilateral flexible outer sheath 12. The four cables 20 are respectively attached to the semi-circular receiving portion 13 of the quadrilateral flexible outer sheath 12. The central flexible core 10 and the outer side of the cable 20 are wrapped from the inside to the outside with the wrapping tape layer 50, the shielding layer 60, the perforated buffer layer 70, the flame retardant layer 80, the heat insulation layer 90, the fireproof layer 91, the outer sheath layer 92, and the wear-resistant layer 93. The flame retardant filling layer 40 is filled in the gaps in the wrapping tape layer 50.
[0020] In this embodiment, the central circular rod 11 of the central flexible core 10 is a high-toughness thermoplastic plastic central circular rod 11 or a nylon central circular rod 11, and the quadrilateral flexible outer sheath 12 is a silicone rubber quadrilateral flexible outer sheath 12, a thermoplastic elastomer quadrilateral flexible outer sheath 12, or a polyvinyl chloride quadrilateral flexible outer sheath 12. More preferably, in this embodiment, the central circular rod 11 is a nylon central circular rod 11. The nylon central circular rod 11 has high mechanical strength, toughness, and fatigue resistance, while also possessing good flexibility and impact resistance. When the cable is subjected to external compression, impact, or bending during installation or use, the nylon central circular rod 11 can effectively disperse the external force, preventing deformation or breakage of the central structure, thereby ensuring the stability of the internal structure of the cable and the safety of the conductor cable 20. The quadrilateral flexible outer sheath 12 is a silicone rubber quadrilateral flexible outer sheath 12. The silicone rubber quadrilateral flexible outer sheath 12 has excellent flexibility, and its good flexibility can absorb and disperse external impact forces when the cable is under stress or bending, enhancing the overall shock resistance and compression resistance. When used in conjunction with the buffer rib 30 and the cable 20, it plays a supporting, buffering, and energy-absorbing role. Through the cooperation of the nylon central circular rod 11 and the silicone rubber flexible outer sheath, the central flexible core 10 of this embodiment achieves a reasonable balance between strength, flexibility, and protective performance. It possesses both good supporting strength and impact resistance, while also taking into account flexibility, enabling the cable to maintain excellent operational stability and reliability in complex environments.
[0021] Preferably, the flame-retardant filler layer 40 is a magnesium hydroxide flame-retardant filler layer 40 or an aluminum hydroxide flame-retardant filler layer 40 doped with alumina particles. In this embodiment, the flame-retardant filler layer 40 is a magnesium hydroxide flame-retardant filler layer 40 doped with alumina particles. This flame-retardant filler layer 40 has excellent flame-retardant properties and good thermal stability. When the cable operates in a high-temperature or fire environment, magnesium hydroxide can decompose endothermically to generate water vapor, thereby absorbing heat and inhibiting the spread of flames. At the same time, the doped alumina particles can further enhance the mechanical strength and structural stability of the filler layer, and can also achieve a certain amount of heat transfer, transferring the heat on the cable 20 to the outer periphery. It should be noted that the flame-retardant filler layer 40 can provide efficient flame-retardant protection in fire environments, delaying the damage of fire to the internal conductors of the cable and ensuring the integrity of the cable line and its electrical transmission function. On the other hand, by filling the gap between the central flexible core 10 and the wrapping tape layer 50, it can also stabilize the position of the cable 20, improve the overall structural compactness and roundness, thereby enhancing the cable's compressive strength and impact resistance, and ensuring the cable's long-term safe and reliable operation under complex working conditions.
[0022] Preferably, the wrapping tape layer 50 is a polyester nonwoven tape, a glass fiber tape, or an aramid fiber tape. In this embodiment, the wrapping tape layer 50 is a polyester nonwoven tape. The polyester nonwoven tape has good flexibility and mechanical strength, and can tightly wrap around the central flexible core 10 and the outside of the cable 20, serving to fix the cable 20, maintain structural stability, and fill gaps.
[0023] Furthermore, the shielding layer 60 is a metal braided mesh layer, a metal foil layer, or a composite layer of metal foil and braided mesh, with a coverage density greater than 80%. In this embodiment, the shielding layer 60 is a metal braided mesh layer with a coverage density greater than 80%, which can effectively cover the outside of the wrapping tape layer 50 and form complete electromagnetic shielding for the internal conductor cable 20. The metal braided mesh layer has good flexibility, which can maintain the continuity of shielding as the cable bends, and at the same time has high mechanical strength, which can enhance the tensile strength of the cable to a certain extent.
[0024] Furthermore, the perforated buffer layer 70 is a rubber perforated buffer layer 70, with multiple holes of 0.1~0.5cm in diameter evenly distributed in a ring on the perforated buffer layer 70. The rubber perforated buffer layer 70 has good flexibility and elasticity, and can effectively absorb mechanical stress and deformation energy when the cable is subjected to external impact or bending, thereby achieving buffering and shock absorption. The perforation further enhances the compressibility and deformation adaptability of the rubber perforated buffer layer 70, enabling it to evenly distribute external stress when under force, reducing direct impact on the internal conductor and other structural layers.
[0025] Preferably, the flame-retardant layer 80 is a ceramicized silicone rubber flame-retardant layer 80 or a mica tape flame-retardant layer 80. Specifically, in this embodiment, the flame-retardant layer 80 is a ceramicized silicone rubber flame-retardant layer 80. The ceramicized silicone rubber flame-retardant layer 80 can form a stable ceramicized protective layer under high-temperature conditions, which can effectively block the damage of flames and heat to the internal structure.
[0026] Preferably, the heat insulation layer 90 is an aerogel composite material heat insulation layer 90, a ceramic fiber heat insulation layer 90, or a glass fiber heat insulation layer 90. In this embodiment, the heat insulation layer 90 is an aerogel composite material heat insulation layer 90. The aerogel composite material heat insulation layer 90 has excellent high-temperature resistance and can effectively isolate heat from being transferred to the inside of the cable in a fire or high-temperature environment, thereby protecting the conductor cable 20 and its internal structure from high-temperature damage.
[0027] Preferably, the fireproof layer 91 is a multi-layered mica tape fireproof layer 91 or a phenolic FRP fireproof layer 91. In this embodiment, the fireproof layer 91 is a multi-layered mica tape fireproof layer 91. The multi-layered mica tape fireproof layer 91 has excellent high-temperature resistance and insulation properties. The multi-layered structure can form a stable protective barrier in fire or high-temperature environments, effectively isolating flames and heat from damaging the internal conductors and functional layers, ensuring the cable's line integrity and electrical transmission performance.
[0028] Preferably, the outer sheath layer 92 is a polycarbonate plastic outer sheath layer 92 with flame-retardant polyurethane foam on the outside. Polycarbonate plastic has high mechanical strength, wear resistance and impact resistance, which can provide robust external protection for the cable; the flame-retardant polyurethane foam covering further enhances the fire resistance of the cable, and can effectively block the spread of flames and delay the transfer of heat to the inside in fire or high temperature environments.
[0029] Preferably, the wear-resistant layer 93 is a polyurethane wear-resistant layer 93. The buffer rib 30 and the arc-shaped member 14 are made of elastic rubber. The buffer rib 30, through the flexible rubber properties, can deform to a certain extent when the cable is subjected to external impact or compression, thereby absorbing and dispersing the mechanical stress acting on the central flexible core 10 and the conductor cable 20; while the arc-shaped member 14, in conjunction with the buffer rib 30, can further enhance the positioning and limiting effect on the flame-retardant filling layer 40, so that the flame-retardant filling layer 40 remains stably distributed inside the cable, preventing displacement due to external forces.
[0030] Preferably, the cable 20 includes a conductor and, from the inside out, an inner insulation layer, an inner shielding layer, and an inner fireproof layer sequentially covering the outside of the conductor. The inner insulation layer is a cross-linked polyethylene inner insulation layer, providing good electrical insulation performance and preventing short circuits in the conductor; the inner shielding layer uses metal foil or metal braided mesh to effectively shield electromagnetic interference and ensure stable signal transmission; the inner fireproof layer is a magnesium hydroxide composite layer or mica tape, which can delay heat absorption and flame propagation in a fire environment.
[0031] This utility model provides an impact-resistant fireproof cable, comprising a central flexible core 10, four cables 20, four buffer ribs 30, a flame-retardant filling layer 40, a wrapping tape layer 50, a shielding layer 60, a perforated buffer layer 70, a flame-retardant layer 80, a heat insulation layer 90, a fireproof layer 91, an outer sheath layer 92, and a wear-resistant layer 93. The central flexible core 10 includes a central circular rod 11 and a quadrilateral flexible outer sheath 12 surrounding it. The four tips of the quadrilateral flexible outer sheath 12 are respectively connected to buffer ribs 30. An arc-shaped component 14 is provided on the side of the buffer rib 30 away from the outer sheath. The cooperation between the buffer rib 30 and the arc-shaped component 14 can limit the flame-retardant filling layer 40 between two adjacent buffer ribs 30, so that the flame-retardant filling layer 40 is stably distributed inside the cable, preventing large displacement due to external forces. This ensures that the overall cable is more round and compact, further improving the structural stability, compressive strength, and impact resistance of the cable. The four sides of the quadrilateral flexible outer sheath 12 are recessed inward to form a semi-circular receiving part 13, in which the four cables 20 are respectively embedded. This avoids conductor displacement causing local stress concentration, thereby improving the overall structural stability and also improving the impact resistance of the cable to a certain extent. The cable's exterior is sequentially layered with a wrapping tape 50, a shielding layer 60, a perforated buffer layer 70, a flame-retardant layer 80, a heat insulation layer 90, a fireproof layer 91, an outer sheath layer 92, and an abrasion-resistant layer 93, forming a multi-layered protective system. The flame-retardant filling layer 40, flame-retardant layer 80, heat insulation layer 90, and fireproof layer 91 work together to create a highly efficient flame-retardant and fireproof barrier, effectively delaying the spread of fire in high-temperature or fire environments and maintaining the integrity and transmission stability of the line. The shielding layer 60 effectively reduces external electromagnetic interference and improves the reliability of cable signal transmission. The perforated buffer layer 70 effectively absorbs mechanical stress and deformation energy when the cable is subjected to external impact or bending, providing buffering, energy absorption, and shock absorption protection, thereby further enhancing the cable's impact resistance and flexibility. The combination of the outer sheath layer 92 and the abrasion-resistant layer 93 enhances the cable's wear and corrosion resistance, enabling it to operate stably for extended periods in high-intensity, complex environments. Therefore, this impact-resistant fireproof cable not only excels in pressure resistance, impact resistance, and fire resistance, but also possesses excellent flexibility and durability, which can significantly extend the service life of the cable.
[0032] The above-disclosed embodiments are merely some preferred embodiments of the present utility model, and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent changes made in accordance with the scope of the present utility model patent application shall still fall within the scope of the present utility model.
Claims
1. A fire resistant cable resistant to impacts, characterized in that: It comprises a central flexible core, four cables, four buffer ribs, a flame-retardant filling layer, a wrapping tape layer, a shielding layer, a perforated buffer layer, a flame-retardant layer, a heat insulation layer, a fireproof layer, an outer sheath layer, and a wear-resistant layer. The central flexible core includes a central circular rod and a quadrilateral flexible outer sheath surrounding the central circular rod. Each of the four sides of the quadrilateral flexible outer sheath is recessed towards the central circular rod, forming a semi-circular receiving portion. A [missing information - likely a device or component] is connected to each of the four pointed ends of the quadrilateral flexible outer sheath. The buffer rib has an arc-shaped component on the side away from the quadrilateral flexible outer sheath. The four cables are respectively attached to the semi-circular receiving part of the quadrilateral flexible outer sheath. The central flexible core and the outer side of the cables are wrapped from the inside to the outside with the wrapping tape layer, the shielding layer, the perforated buffer layer, the flame retardant layer, the heat insulation layer, the fireproof layer, the outer sheath layer, and the wear-resistant layer. The flame retardant filling layer is filled in the gaps within the wrapping tape layer.
2. The impact-resistant fire resistant cable of claim 1, wherein, The central circular rod is a high-toughness thermoplastic plastic central circular rod or a nylon central circular rod, and the quadrilateral flexible outer layer is a silicone rubber quadrilateral flexible outer layer, a thermoplastic elastomer quadrilateral flexible outer layer, or a polyvinyl chloride quadrilateral flexible outer layer.
3. The impact resistant fire resistant cable of claim 1, wherein, The flame-retardant filler layer is a magnesium hydroxide flame-retardant filler layer or an aluminum hydroxide flame-retardant filler layer doped with alumina particles.
4. The impact resistant, fire resistant cable of claim 1, wherein, The wrapping tape layer is a polyester nonwoven tape, a glass fiber tape, or an aramid fiber tape.
5. The impact-resistant fire resistant cable of claim 4, wherein, The shielding layer is a metal woven mesh layer, a metal foil layer, or a composite layer of metal foil and woven mesh, with a coverage density greater than 80%.
6. The impact-resistant, fire-resistant cable of claim 4, wherein, The perforated buffer layer is a rubber perforated buffer layer, and multiple holes with a diameter of 0.1~0.5cm are evenly distributed in a ring on the perforated buffer layer.
7. The impact resistant, fire resistant cable of claim 1, wherein, The flame-retardant layer is a ceramicized silicone rubber flame-retardant layer or a mica tape flame-retardant layer.
8. The impact resistant, fire resistant cable of claim 1, wherein, The insulation layer is an aerogel composite material insulation layer, a ceramic fiber insulation layer, or a glass fiber insulation layer.
9. The ruggedized fire resistant cable of claim 1, wherein, The fireproof layer is a multi-layered mica tape fireproof layer or a phenolic FRP fireproof layer.
10. The ruggedized fire resistant cable of claim 1, wherein, The outer sheath is a polycarbonate plastic outer sheath with flame-retardant polyurethane foam adhesive on the outside.