Flame-retardant fireproof power cable
By using separators and multi-layer sheath design, combined with specific materials, the problem of insufficient mechanical strength and flexibility of existing cables in complex environments has been solved, resulting in a cable with high strength, flexibility, and flame-retardant and fire-resistant properties, thus improving the stability and safety of the cable.
Patent Information
- Application Number
- CN202422954871.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing flame-retardant and fire-resistant power cables are difficult to balance mechanical strength, flexibility and service life in complex environments, and are prone to rapid combustion in the event of a fire, leading to power outages and the spread of fire.
The cable employs a partition design, comprising a central flexible core, flexible connecting rods, and a flexible arc-shaped plate structure. Combined with inner and outer sheaths, inner and outer shielding layers, heat dissipation layers, and flame-retardant layers, it utilizes materials such as ceramicized halogen-free polyolefin and alkali-free glass fiber filler rope to enhance the cable's structural stability, flexibility, and flame-retardant performance.
It improves the cable's structural stability, flexibility, crack resistance, and flame retardant properties, extends its service life, reduces cable temperature, and enhances its adaptability and current carrying capacity.
Smart Images
Figure CN223552293U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cable technology, specifically to a flame-retardant and fire-resistant power cable. Background Technology
[0002] In power transmission and distribution systems, power cables are critical components, and their performance directly affects the stability and security of the power system. With the continuous growth of electricity demand and the increasing demands for safety and reliability in power systems, the performance requirements for power cables are also rising, especially in terms of flame retardancy and fire resistance. Traditional power cable designs often focus on conductivity and basic insulation protection. However, in complex and variable operating environments, such as high temperature, humidity, and flammability, the limitations of traditional cables are becoming increasingly apparent. Particularly in the event of a fire, the rapid combustion of cables can not only lead to power outages but also exacerbate the spread of fire, posing a serious threat to personnel and property safety.
[0003] To address these challenges, the cable industry is developing flame-retardant and fire-resistant cables, aiming to improve their stability and safety under extreme conditions. These cables typically enhance their flame-retardant and fire-resistant capabilities by improving conductor materials, strengthening insulation performance, and adding flame-retardant materials. However, these methods often fail to simultaneously achieve optimal mechanical strength, flexibility, and service life. Therefore, it is necessary to provide a flame-retardant and fire-resistant power cable that combines strong flame-retardant and fire-resistant properties with high mechanical strength, flexibility, and service life. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a flame-retardant and fire-resistant power cable, which solves the problem that the overall performance of some existing flame-retardant and fire-resistant power cables is not strong enough.
[0005] A flame-retardant and fire-resistant power cable includes a cable core comprising multiple stranded copper conductors and an inner insulation layer, an inner shielding layer, and an inner heat dissipation layer disposed outside the copper conductors. It also includes a sheath comprising a separator and an outer sheath disposed outside the separator. The separator comprises a central flexible core, flexible connecting rods uniformly connected to the outer side of the central flexible core, and flexible arc-shaped plates disposed at the ends of the flexible connecting rods. Gaps exist between adjacent flexible arc-shaped plates. The cable core is disposed between two of the flexible connecting rods. The outer sheath comprises an outer shielding layer, a flame-retardant layer, an outer heat dissipation layer, and a copper sheath with a corrugated surface disposed outside the flexible arc-shaped plates. A wear-resistant layer is disposed outside the copper sheath.
[0006] Preferably, the separator is filled with a filling material.
[0007] Furthermore, the filling material is a ceramicized halogen-free polyolefin, a ceramicized fire-resistant and refractory filling rope, or an alkali-free glass fiber filling rope.
[0008] Preferably, a tensile steel wire is provided inside the central flexible core.
[0009] Preferably, the filling material contains fine steel wires.
[0010] Preferably, the inner insulation layer is a polyimide composite film insulation layer with PTFE coated on both sides of the copper conductor.
[0011] Preferably, the inner shielding layer is an aluminum foil shielding layer, and the outer shielding layer is a copper wire braided shielding layer.
[0012] Preferably, both the inner heat dissipation layer and the outer heat dissipation layer are made of thermally conductive rubber.
[0013] Preferably, the wear-resistant layer is an environmentally friendly epoxy-based anti-corrosion and wear-resistant coating layer.
[0014] Preferably, the wear-resistant layer is provided with a plurality of dividing mark grooves at predetermined intervals, and the dividing mark grooves are coated with colored pigments.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] This utility model provides a flame-retardant and fire-resistant power cable. By incorporating a separator comprising a central flexible core, a flexible connecting rod, and a flexible arc-shaped plate structure, the cable core is stably supported and separated, improving the overall structural stability of the cable and reducing mutual compression and damage to the cable core during transportation and use. Secondly, the flexible design of the separator and the textured copper sheath on the outer sheath surface enable the cable to maintain high strength and stability while also possessing good flexibility. This allows the cable to easily cope with various complex environments and bending requirements during laying and use, improving its adaptability and service life. The copper sheath also enhances the cable's crack resistance. Thirdly, the wear-resistant layer enhances the wear resistance of the copper sheath, effectively preventing performance degradation due to wear during long-term use. Furthermore, the inner and outer heat dissipation layers not only reduce the cable's temperature during operation but also improve its current carrying capacity and stability. Finally, the combination of the flame-retardant layer and the copper sheath significantly enhances the cable's flame-retardant and fire-resistant properties. Therefore, this flame-retardant and fire-resistant power cable exhibits excellent performance in terms of structural stability, flexibility, abrasion resistance, heat dissipation, and flame-retardant and fire-resistant properties. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the flame-retardant and fire-resistant power cable described in this utility model;
[0018] Figure 2 This is a side view of the copper sheath described in this utility model.
[0019] in:
[0020] 10-Cable core, 11-Copper conductor, 12-Inner insulation layer, 13-Inner shielding layer, 14-Inner heat dissipation layer, 21-Separator, 22-Outer sheath, 211-Central flexible core, 212-Flexible connecting rod, 213-Flexible arc plate, 214-Tension steel wire, 215-Filling material, 222-Outer shielding layer, 223-Flame retardant layer, 224-Outer heat dissipation layer, 225-Copper sheath. Detailed Implementation
[0021] 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.
[0022] See Figure 1 as well as Figure 2 This embodiment provides a flame-retardant and fire-resistant power cable, comprising a cable core 10 and a sheath disposed outside the cable core 10. The cable core 10 includes multiple stranded copper conductors 11 and an inner insulation layer 12, an inner shielding layer 13, and an inner heat dissipation layer 14 disposed outside the copper conductors 11. The sheath includes a separator 21 and an outer sheath 22 disposed outside the separator 21. The separator 21 includes a central flexible core 211 and outer sheaths uniformly connected to the central flexible core 211. The flexible connecting rod 212 on the side and the flexible arc plate 213 disposed at the end of the flexible connecting rod 212, with a gap between adjacent flexible arc plates 213, the cable core 10 is disposed between the two flexible connecting rods 212 respectively, the outer sheath 22 includes an outer shielding layer 222, a flame retardant layer 223, an outer heat dissipation layer 224 disposed on the outside of the flexible arc plate 213, and a copper sheath 225 with a corrugated surface, the copper sheath 225 having a wear-resistant layer disposed on the outside.
[0023] Preferably, the separator 21 is filled with a filler material 215. Specifically, the filler material 215 is a ceramicized halogen-free polyolefin, a ceramicized fire-resistant and fire-retardant filler rope, or an alkali-free glass fiber filler rope. These filler materials 215 not only possess excellent flame-retardant and fire-resistant properties, effectively preventing the spread of fire and protecting the integrity of the cable's internal structure during a fire, but also have good mechanical strength and thermal stability, further enhancing the overall structural strength of the cable and improving its durability and service life in complex environments. It should also be noted that the ceramicized halogen-free polyolefin filler material 215 forms a hard ceramic-like protective layer during combustion, effectively isolating heat transfer and slowing the spread of fire. The ceramicized fire-resistant and fire-retardant filler rope, with its excellent high-temperature resistance and fire-resistant properties, provides an additional safety barrier for the cable. The alkali-free glass fiber filler rope, with its high strength, corrosion resistance, and low thermal conductivity, further enhances the mechanical strength and thermal stability of the cable.
[0024] Preferably, a tensile steel wire 214 is disposed within the central flexible core. The addition of the tensile steel wire 214 enables the cable to maintain a more stable structural shape when coping with complex environments and bending requirements, reduces performance degradation caused by external forces such as bending and stretching, and further enhances the overall structural stability of the cable.
[0025] In order to further improve the tensile strength of the cable, the filler material 215 is provided with fine steel wires.
[0026] Preferably, the inner insulation layer 12 is a polyimide composite film insulation layer with PTFE coated on both sides of the copper conductor 11. It should be noted that PTFE has excellent electrical properties, chemical stability, and high-temperature resistance, effectively improving the insulation strength and voltage withstand rating of the cable, ensuring stable operation of the cable in complex electrical environments such as high voltage and high frequency. Simultaneously, the addition of the polyimide composite film further enhances the mechanical strength of the inner insulation layer 12, increasing the cable's service life. In this embodiment, the outer shielding layer 222 is provided with a low-smoke halogen-free flame-retardant irradiated cross-linked polyolefin outer insulation layer. The low-smoke halogen-free flame-retardant irradiated cross-linked polyolefin not only possesses excellent flame-retardant properties, effectively preventing the spread of fire and protecting the integrity of the cable's internal structure in the event of a fire, but also meets environmental protection requirements, producing very little smoke and harmful gases during combustion, minimizing the impact on the environment and personnel safety. The application of irradiated cross-linking technology further improves the thermal stability and mechanical strength of the outer insulation layer, enabling it to maintain stable performance in harsh environments such as high temperature and humidity.
[0027] Preferably, the inner shielding layer 13 is an aluminum foil shielding layer, and the outer shielding layer 222 is a copper wire braided shielding layer. The aluminum foil shielding layer has excellent conductivity and electromagnetic shielding effect, effectively preventing leakage of the electromagnetic field inside the cable and reducing the impact of electromagnetic interference on cable performance. Simultaneously, the aluminum foil shielding layer also possesses good flexibility and mechanical strength, adapting to the bending and stretching requirements of the cable during laying and use, maintaining a stable shielding effect. The copper wire braided shielding layer has excellent electromagnetic shielding effect, effectively resisting interference from external electromagnetic fields and protecting the transmission quality of signals and data inside the cable. At the same time, the copper wire braided structure gives the shielding layer higher mechanical strength and wear resistance, enabling it to maintain stable shielding performance in complex environments.
[0028] Preferably, both the inner heat dissipation layer 14 and the outer heat dissipation layer 224 are made of thermally conductive rubber. Thermally conductive rubber is a material with high thermal conductivity and excellent flexibility, capable of rapidly transferring heat generated inside the cable to the outside, effectively reducing the cable's operating temperature and improving its current carrying capacity and stability. Simultaneously, thermally conductive rubber also possesses good insulation and aging resistance, maintaining stable heat dissipation in harsh environments such as long-term high temperatures and humidity. It should be noted that when heat is generated inside the cable, the outer heat dissipation layer 224 can quickly transfer the heat from inside the cable to the copper sheath 225. The copper sheath 225, as an excellent thermally conductive material, can quickly disperse the received heat into the surrounding environment, thereby effectively reducing the cable's operating temperature.
[0029] Preferably, the wear-resistant layer is an environmentally friendly epoxy-based anti-corrosion and wear-resistant coating. This environmentally friendly epoxy-based anti-corrosion and wear-resistant coating not only possesses excellent wear resistance, effectively resisting the performance degradation of the copper sheath 225 due to friction and wear during long-term use, but also has good anti-corrosion properties, protecting the cable from corrosive substances in the environment and extending its service life. Furthermore, this environmentally friendly epoxy-based anti-corrosion and wear-resistant coating meets modern environmental protection requirements, contains no harmful substances, and is harmless to humans and the environment. It reduces environmental pollution during the cable's production, use, and disposal, aligning with the concept of sustainable development.
[0030] Preferably, the wear-resistant layer is provided with a plurality of dividing mark grooves at predetermined intervals, and the dividing mark grooves are coated with colored pigment. The colored pigment makes it easy for users to observe the number of dividing mark grooves, thereby cutting the corresponding length of power cable, eliminating the need to carry other tools for measurement, making the operation simpler and more convenient.
[0031] Preferably, the number of cable cores 10 in this embodiment is 5, but other numbers are also possible, which will not be elaborated here.
[0032] This utility model provides a flame-retardant and fire-resistant power cable. By setting a separator 21, which includes a central flexible core, a flexible connecting rod 212, and a flexible arc plate 213, the cable core 10 is stably supported and separated. This not only improves the overall structural stability of the cable but also reduces mutual compression and damage to the cable core 10 during transportation and use. Furthermore, the flexible design of the separator 21 and the textured copper sheath 225 on the surface of the outer sheath 22 enable the cable to maintain high strength and stability while also possessing good flexibility, making the cable more flexible during laying and use. The cable can easily cope with various complex environments and bending requirements, improving its adaptability and service life. The copper sheath also enhances its crack resistance. Furthermore, the wear-resistant layer enhances the wear resistance of the copper sheath 225, effectively preventing performance degradation due to wear during long-term use. In addition, the inner heat dissipation layer 14 and outer heat dissipation layer 224 not only reduce the cable's temperature during operation but also improve its current carrying capacity and stability. The combination of the flame-retardant layer 223 and the copper sheath 225 significantly enhances the cable's flame-retardant and fire-resistant properties. Therefore, this flame-retardant and fire-resistant power cable exhibits excellent performance in terms of structural stability, flexibility, crack resistance, wear resistance, heat dissipation, and flame-retardant and fire-resistant properties.
[0033] 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 flame-retardant and fire-resistant power cable, comprising a cable core, wherein the cable core comprises multiple stranded copper conductors and an inner insulation layer, an inner shielding layer, and an inner heat dissipation layer disposed outside the copper conductors, characterized in that, It also includes a sheath, which includes a separator and an outer sheath disposed outside the separator. The separator includes a central flexible core, flexible connecting rods uniformly connected to the outside of the central flexible core, and flexible arc plates disposed at the ends of the flexible connecting rods. There is a gap between adjacent flexible arc plates. The cable cores are respectively disposed between two of the flexible connecting rods. The outer sheath includes an outer shielding layer, a flame retardant layer, an outer heat dissipation layer, and a copper sheath with a corrugated surface disposed outside the flexible arc plates. A wear-resistant layer is disposed outside the copper sheath.
2. The flame-retardant and fire-resistant power cable as described in claim 1, characterized in that, The separator is filled with a filling material.
3. The flame-retardant and fire-resistant power cable as described in claim 2, characterized in that, The filling material is ceramicized halogen-free polyolefin, ceramicized fireproof and refractory filling rope, or alkali-free glass fiber filling rope.
4. The flame-retardant and fire-resistant power cable as described in claim 1, characterized in that, A tensile steel wire is installed inside the central flexible core.
5. The flame-retardant and fire-resistant power cable as described in claim 2, characterized in that, The filling material contains fine steel wires.
6. The flame-retardant and fire-resistant power cable as described in claim 1, characterized in that, The inner insulation layer is a polyimide composite film insulation layer with PTFE coated on both sides of the copper conductor.
7. The flame-retardant and fire-resistant power cable as described in claim 1, characterized in that, The inner shielding layer is an aluminum foil shielding layer, and the outer shielding layer is a copper wire braided shielding layer.
8. The flame-retardant and fire-resistant power cable as described in claim 1, characterized in that, Both the inner heat dissipation layer and the outer heat dissipation layer are made of thermally conductive rubber.
9. The flame-retardant and fire-resistant power cable as described in claim 1, characterized in that, The wear-resistant layer is an environmentally friendly epoxy-based anti-corrosion and wear-resistant coating layer.
10. The flame-retardant and fire-resistant power cable as described in claim 1, characterized in that, The wear-resistant layer is provided with a number of dividing mark grooves at predetermined intervals, and the dividing mark grooves are coated with colored pigments.