A steel-tape armoured fire resistant cable
The steel-tape armored fire-resistant cable with a multi-layer structure design solves the problem of fire-resistant material failure at high temperatures in existing technologies, and achieves stable power transmission and safety assurance in complex environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI NANDA GRP ZHEJIANG CABLE CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-07-14
AI Technical Summary
Existing steel-reinforced fire-resistant cables are prone to carbonization and peeling of the refractory material at high temperatures, making them unable to provide effective fire protection continuously. This can lead to power transmission interruptions and potential secondary disasters, threatening life and property safety.
The cable adopts a multi-layer structure design, including an inner sheath, a metal armor layer, a non-metallic reinforcing fiber layer, a sealing layer, an anti-interference layer, a fire-resistant layer, and an outer sheath, which respectively provide protection for insulation, mechanical strength, waterproofing, electromagnetic shielding, and fire resistance, ensuring stable operation of the cable in complex environments.
It improves the applicability and reliability of cables in complex environments, ensures the stability and safety of power transmission, reduces maintenance costs, and enhances the mechanical strength and tensile properties of cables.
Smart Images
Figure CN224501517U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cable technology, and in particular to a steel-tape armored fire-resistant cable. Background Technology
[0002] When fire-resistant steel-tape armored cables are used, a special type of steel-tape armored fire-resistant cable is often employed. This cable has a special structure, with an outer layer of sturdy steel tape as a protective layer and an inner layer made of fire-resistant materials. This allows the cable to maintain its power transmission function even when subjected to extreme environments such as flames and high temperatures, thereby ensuring the normal operation of critical facilities or systems. The benefits of using steel-tape armored fire-resistant cables include improved safety, prevention of circuit interruption during fires, enhanced physical protection, resistance to external impacts and mechanical damage, extended cable lifespan, and reduced maintenance costs.
[0003] Steel tape armored fire-resistant cable. First, the copper or aluminum conductor is insulated, then stranded into a cable core. Next, a layer of fire-resistant material, such as mica tape, is wrapped around the cable core to provide fire protection. Then, steel tape is spirally wound around the fire-resistant layer to form a robust armor layer, enhancing the cable's mechanical strength and protective performance. Finally, an outer sheath is applied.
[0004] In existing technologies, some steel-tape armored fire-resistant cable devices achieve their fire-resistant function primarily by wrapping the cable with ordinary fire-resistant materials and coating the steel tape with a fire-retardant coating. However, these conventional fire-resistant methods have many drawbacks. Ordinary fire-resistant materials are prone to carbonization and peeling at high temperatures, failing to provide effective fire protection for the cable continuously. The fire-retardant coating's fire resistance deteriorates rapidly under high-temperature burning, failing to meet the fire resistance requirements of cables in prolonged fire scenarios. Once the cable's fire-resistant structure fails, it can not only lead to power transmission interruption but also cause secondary disasters due to cable short circuits, seriously threatening life and property safety. Therefore, a steel-tape armored fire-resistant cable is proposed to solve the above problems. Utility Model Content
[0005] The purpose of this application is to provide a steel-tape armored fire-resistant cable, which aims to improve the problem that some existing devices cannot fire-resistant steel-tape armored cables.
[0006] The steel-tape armored fire-resistant cable provided in this application adopts the following technical solution:
[0007] A steel-tape armored fire-resistant cable includes a protective mechanism, inside which a cable mechanism is provided. The cable mechanism includes an inner sheath, inside which a conductive component is provided. A metal armor layer is fixedly connected to the outside of the inner sheath, and a non-metallic reinforcing fiber layer is fixedly connected to the outside of the metal armor layer. The outside of the inner sheath is located inside the protective mechanism.
[0008] The above technical solution effectively protects the internal cable through its protective structure, the inner sheath resists external environmental influences to ensure the safety of conductive components, and the metallic armor layer provides strong mechanical protection and enhances compressive strength. The non-metallic reinforcing fiber layer further improves overall strength and toughness. In harsh environments such as fires, the cable ensures stable power transmission and is suitable for locations with high fire resistance and protection requirements.
[0009] Preferred:
[0010] The protective mechanism includes a sealing layer, an anti-interference layer fixedly connected to the outside of the sealing layer, a fire-resistant layer fixedly connected to the outside of the anti-interference layer, and an outer protective layer fixedly connected to the outside of the fire-resistant layer.
[0011] By adopting the above technical solutions: a sealing layer to prevent liquid intrusion, an anti-interference layer to reduce electromagnetic influence, a fire-resistant layer to protect the cable from high temperatures, and an outer sheath to resist wear and impact, the cable can be effectively guaranteed to operate stably in complex environments.
[0012] Preferred:
[0013] The conductive component includes a reinforcing layer, with multiple insulating layers fixedly connected inside the reinforcing layer, a conductor layer fixedly connected inside the insulating layer, and multiple filling layers fixedly connected inside the reinforcing layer.
[0014] By adopting the above technical solution: in the conductive components, the reinforcing layer enhances the overall structural strength, the insulation layer ensures safe current transmission and avoids leakage, the conductor layer conducts electricity efficiently, and the filling layer makes the interior more compact. The multi-layer cooperation improves the conductivity stability of the cable and reduces the risk of failure.
[0015] Preferred:
[0016] The outer part of the inner protective layer is fixedly connected to the inside of the sealing layer, and the outer part of the inner protective layer is sleeved inside the non-metallic reinforcing fiber layer.
[0017] By adopting the above technical solution, the inner sheath is fixed to the outside of the sealing layer to ensure a tight fit and enhance protection. At the same time, it is wrapped inside the non-metallic reinforcing fiber layer. The two work together to effectively resist external impacts and provide multi-layer protection for the cable under extreme conditions such as fire, ensuring the safe and stable operation of the cable.
[0018] Preferred:
[0019] The outer protective layer is disposed on the outside of the protective mechanism, and the inner protective layer is sleeved on the outside of the metal armor layer.
[0020] By adopting the above technical solution—with the outer sheath placed inside the protective structure to add external protection, and the inner sheath fitted inside the metal armor layer—the cable possesses good mechanical strength and protective performance, enabling it to withstand external pressure, abrasion, and harsh environments, ensuring stable power transmission.
[0021] Preferred:
[0022] The metal armor layer is fixedly connected to the inside of the sealing layer, and the inside of the sealing layer is fixedly connected to the outside of the non-metallic reinforcing fiber layer.
[0023] By adopting the above technical solution, the metal armor layer is fixed inside the sealing layer to enhance the compressive strength, and the sealing layer is fixed to the outside of the non-metallic reinforcing fiber layer. This can effectively seal and prevent moisture, and also improve the overall toughness with the fiber layer, so that the cable can operate stably in complex environments.
[0024] Preferred:
[0025] The inner protective layer is fixedly connected to the outside of the reinforcing layer, and the inner protective layer is fixedly connected to the outside of the filling layer.
[0026] By adopting the above technical solution: the inner sheath is fixed to the outside of the reinforcing layer, the reinforcing layer enhances the structural strength, and the inner sheath is connected to the outside of the filling layer, making the inside more compact. This structure makes the cable internally stable, reduces shaking and wear, ensures the safety of conductive components, and improves the overall performance of the cable.
[0027] Preferred:
[0028] The outer surface of the filler layer is disposed inside the reinforcing layer, and the outer surface of the conductor layer is disposed inside the reinforcing layer.
[0029] By adopting the above technical solution, the internal structure is made more compact and gaps are reduced by placing the filler layer inside the reinforcement layer. The conductor layer is also inside the reinforcement layer, which provides strong support and protection for it, preventing the conductor from being deformed or damaged by external influences and ensuring stable conductivity of the cable.
[0030] In summary, this application includes at least one of the following beneficial technical effects:
[0031] 1. Through the internal cable structure, the inner sheath provides insulation and buffer protection to ensure the stable operation of the conductive components. Within the conductive components, the reinforcing layer enhances the strength and rigidity of the conductor layer, the insulation layer prevents current leakage and short circuits, the conductor layer ensures efficient transmission of current and signals, the filling layer makes the internal structure compact and stable, the metal armor layer can withstand external pressure and has both physical protection and grounding protection functions, and the non-metallic reinforcing fiber layer significantly improves tensile and fatigue resistance while reducing weight. All these features comprehensively ensure that the cable can achieve stable and efficient power transmission under complex working conditions, reduce maintenance costs, and provide reliable protection for power transmission.
[0032] 2. The outermost sheath protects against external physical damage, enhancing the cable's durability. The fire-resistant layer ensures the cable's structure and insulation performance during a fire, maintaining power or signal transmission and improving safety. The anti-interference layer blocks external electromagnetic interference, ensuring the accuracy and stability of signal transmission. The sealing layer prevents the intrusion of moisture, humidity, and corrosive substances, ensuring the cable's insulation and electrical performance in harsh environments. Ultimately, this achieves efficient and stable power transmission, significantly improving the cable's applicability and reliability in complex environments. Attached Figure Description
[0033] Figure 1 This is a three-dimensional schematic diagram of a steel-tape armored fire-resistant cable proposed in this utility model;
[0034] Figure 2 This is a schematic diagram of the outer sheath of a steel-tape armored fire-resistant cable proposed in this utility model;
[0035] Figure 3 This is a schematic diagram of the inner sheath of a steel-tape armored fire-resistant cable proposed in this utility model;
[0036] Figure 4 for Figure 3 Enlarged view of point A in the middle;
[0037] Explanation of reference numerals in the attached drawings: 1. Protective structure; 11. Outer sheath; 12. Fire-resistant layer; 13. Anti-interference layer; 14. Sealing layer; 2. Cable structure; 21. Inner sheath; 22. Conductive component; 221. Reinforcing layer; 222. Insulation layer; 223. Conductor layer; 224. Filling layer; 23. Metal armor layer; 24. Non-metallic reinforcing fiber layer. Detailed Implementation
[0038] The following is in conjunction with the appendix Figure 1 - Appendix Figure 4 This application will be described in further detail below.
[0039] Example: A steel-tape armored fire-resistant cable, referring to... Figure 1 and Figure 3The cable includes a protective mechanism 1, which is the outer protective system of the cable. It is responsible for resisting the damage of complex external environment and ensuring the stable operation of the internal structure of the cable. The cable mechanism 2 is installed inside the protective mechanism 1. The cable mechanism 2 is the core part for realizing power transmission and ensuring the efficient and stable operation of the cable. The cable mechanism 2 includes an inner sheath 21, which provides additional insulation protection for the conductive components 22 inside the cable and prevents short circuits between the conductive components 22 and the external metal armor layer 23. At the same time, the inner sheath 21 can also play a certain buffering role, reducing the stress on the internal components of the cable under bending, stretching and other conditions.
[0040] Specifically, the outer protective mechanism 1 serves as the outer protective system for the cable, which can resist the damage from complex external environments and ensure the stable operation of the internal structure. The cable mechanism 2 inside the protective mechanism 1 is the core part for realizing power transmission. It includes an inner sheath 21, which provides additional insulation protection for the internal conductive components 22 of the cable, prevents short circuits between the conductive components 22 and the external metal armor layer 23, and also plays a buffering role, reducing the stress on the internal components of the cable under bending, stretching and other conditions.
[0041] The inner sheath 21 is internally equipped with a conductive component 22, which is the core of the cable for power transmission. The inner sheath 21 is externally fixedly connected with a metal armor layer 23. The metal armor layer 23 has high mechanical strength and can withstand external pressure, tension and impact, providing strong physical protection for the optical fiber cable inside the cable. The metal armor layer 23 also has a certain grounding protection function. When the cable has a fault such as leakage, it can conduct the current to the ground to ensure the safety of personnel and equipment. The metal armor layer 23 is externally fixedly connected with a non-metallic reinforcing fiber layer 24, which has the advantages of light weight, high strength and corrosion resistance. It can significantly improve the tensile strength and fatigue resistance of the cable without affecting the overall weight of the cable. The outer part of the inner sheath 21 is set inside the protective mechanism 1.
[0042] Specifically, the inner sheath 21 contains a conductive component 22, which is the core of power transmission. The inner sheath 21 is fixedly connected to a metal armor layer 23, which has high mechanical strength and can withstand external pressure, tension and impact, providing physical protection for the optical fiber cable and also has a grounding protection function. The metal armor layer 23 is fixedly connected to a non-metallic reinforcing fiber layer 24, which is lightweight, high-strength and corrosion-resistant, and can improve the cable's tensile and fatigue resistance. The outer part of the inner sheath 21 is inside the protective mechanism 1.
[0043] The protective mechanism 1 includes a sealing layer 14 to prevent moisture, dampness, and external corrosive substances from entering the cable. This ensures that the cable maintains good insulation and electrical properties even in harsh environments such as dampness and dust. In some underground or long-term outdoor cable applications, the sealing layer 14 can effectively block the penetration of underground water and prevent the cable from getting damp and causing a short circuit. An anti-interference layer 13 is fixedly connected to the outside of the sealing layer 14. It has good electromagnetic shielding performance and can effectively block the interference of external electromagnetic waves, preventing external electromagnetic signals from affecting the signals transmitted inside the cable. When the cable is laid in parallel with power equipment or communication lines, the anti-interference layer 13 can prevent electromagnetic coupling and ensure the accuracy and stability of the power or signal transmitted by the cable.
[0044] Specifically, the sealing layer 14 prevents moisture, dampness, and corrosive substances from entering the cable, ensuring its insulation and electrical performance in harsh environments. Especially in underground or outdoor settings, it can block moisture penetration and prevent short circuits. The anti-interference layer 13 outside the sealing layer 14 has good electromagnetic shielding performance, which can block external electromagnetic wave interference, prevent electromagnetic coupling, and ensure the accuracy and stability of the cable's power or signal transmission.
[0045] The anti-interference layer 13 is externally fixedly connected to a fire-resistant layer 12, which has an extremely high fire resistance temperature. In the event of a fire, it can maintain the structural integrity and insulation performance of the cable for a certain period of time, ensuring that the cable can still transmit power or signals normally, providing valuable time for personnel evacuation and fire rescue. The fire-resistant layer 12 is externally fixedly connected to an outer sheath 11, which has good weather resistance, abrasion resistance and mechanical strength, and can protect the optical fiber cable inside the cable from external physical damage, such as friction, compression and collision.
[0046] Specifically, the fire-resistant layer 12 is fixedly connected to the outside of the anti-interference layer 13. Its fire resistance temperature is extremely high. In the event of a fire, it can maintain the integrity of the cable structure and insulation performance for a certain period of time, ensuring that the cable can transmit power or signals normally, thus buying time for personnel evacuation and fire rescue. The outer sheath 11 fixedly connected to the outside of the fire-resistant layer 12 has good weather resistance, wear resistance and mechanical strength, which can protect the internal optical fiber cable from external physical damage such as friction, compression and collision.
[0047] Reference Figure 2 and Figure 4The conductive component 22 includes a reinforcing layer 221, which provides mechanical support for the conductor layer 223, enhances the overall strength and rigidity of the conductor, and prevents the conductor from deforming or breaking when subjected to external forces. Multiple insulating layers 222 are fixedly connected inside the reinforcing layer 221 to isolate the conductor from the external environment, prevent current leakage and short circuits, and ensure that the insulation performance of the cable meets relevant standards and requirements. The conductor layer 223 is fixedly connected inside the insulating layer 222. The conductor layer 223 is the core part of the cable and is responsible for transmitting current or signals. In power cables with high current transmission, a conductor layer 223 with a larger cross-sectional area is required to reduce resistance loss and heat generation. However, in some control signal transmission cables, the cross-sectional area of the conductor layer 223 is relatively small.
[0048] Specifically, through multiple insulation layers 222 and conductor layers 223, the reinforcing layer 221 provides mechanical support for the conductor layer 223, enhancing its strength and rigidity and preventing deformation or breakage. The insulation layer 222 inside the reinforcing layer 221 isolates the conductor from the outside world, preventing current leakage and short circuits, and ensuring that the insulation performance meets the standards. The conductor layer 223 inside the insulation layer 222 is the core of the cable, responsible for transmitting current or signals. High-current power cables require conductor layers 223 with large cross-sectional areas to reduce resistance loss and heat generation, while the conductor layer 223 of control signal transmission cables has a relatively small cross-sectional area.
[0049] The reinforcing layer 221 has multiple filling layers 224 fixedly connected inside to fill the gaps between the conductor layers 223, making the internal structure of the cable more compact and stable, and preventing the conductor from shifting and rubbing during cable bending or vibration. The outer sheath 21 is fixedly connected inside the sealing layer 14. The outer sheath 21 is sleeved inside the non-metallic reinforcing fiber layer 24. The outer sheath 11 is set inside the protective mechanism 1. The outer sheath 21 is sleeved inside the metal armor layer 23.
[0050] Specifically, multiple filling layers 224 are fixedly connected inside the reinforcing layer 221 to fill the gaps between the conductor layers 223, making the internal structure of the cable compact and stable, and preventing the conductor from shifting or rubbing during bending or vibration. In addition, the inner sheath 21 is fixedly connected inside the sealing layer 14 and is sleeved inside the non-metallic reinforcing fiber layer 24 and the metal armor layer 23. The outer sheath 11 is set inside the protective mechanism 1.
[0051] Reference Figures 3 to 4 The metal armor layer 23 is fixedly connected to the inside of the sealing layer 14, the inside of the sealing layer 14 is fixedly connected to the outside of the non-metallic reinforcing fiber layer 24, the inside of the inner protective layer 21 is fixedly connected to the outside of the reinforcing layer 221, the inside of the inner protective layer 21 is fixedly connected to the outside of the filling layer 224, the outside of the filling layer 224 is disposed inside the reinforcing layer 221, and the outside of the conductor layer 223 is disposed inside the reinforcing layer 221.
[0052] Specifically, the metal armor layer 23 is fixed inside the sealing layer 14, the sealing layer 14 is fixed inside the non-metallic reinforcing fiber layer 24, the inner protective layer 21 is fixed inside the reinforcing layer 221 and the filling layer 224, and the filling layer 224 and the conductor layer 223 are both located inside the reinforcing layer 221.
[0053] The implementation principle of this application embodiment is as follows: the external protective mechanism 1 resists the damage of the complex external environment and protects the internal structure. In the internal cable mechanism 2, the inner sheath 21 provides insulation protection and buffer for the conductive component 22. In the conductive component 22, the reinforcing layer 221 enhances the strength and rigidity of the conductor layer 223. The insulating layer 222 isolates the conductor to prevent current leakage and short circuit. The conductor layer 223 is responsible for transmitting current or signals. The filling layer 224 fills the gaps to make the internal structure compact and stable. The metal armor layer 23 withstands external pressure and provides physical protection and grounding protection. The non-metallic reinforcing fiber layer 24 improves the tensile and fatigue resistance of the cable without increasing the overall weight, and together ensures the efficient and stable transmission of cable power.
[0054] The outer sheath 11 serves as the outermost layer of the protective mechanism 1, resisting external physical damage. Subsequently, the fire-resistant layer 12 ensures the cable structure and insulation performance in the event of a fire, maintaining power or signal transmission. The anti-interference layer 13 blocks external electromagnetic interference, ensuring the accuracy and stability of the cable's signal transmission. The sealing layer 14 prevents moisture, humidity, and corrosive substances from entering, ensuring good insulation and electrical performance of the cable in harsh environments. Working in conjunction with the cable mechanism 2, it achieves efficient and stable power transmission.
[0055] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.
Claims
1. A steel-tape armored fire-resistant cable, comprising a protective mechanism (1), characterized in that, The protective mechanism (1) is equipped with a cable mechanism (2) inside. The cable mechanism (2) includes an inner sheath (21), inside which a conductive component (22) is disposed, and outside which a metal armor layer (23) is fixedly connected, and outside which a non-metallic reinforcing fiber layer (24) is fixedly connected, and outside which the inner sheath (21) is disposed inside the protective mechanism (1).
2. The steel-tape armored fire-resistant cable according to claim 1, characterized in that, The protective mechanism (1) includes a sealing layer (14), an anti-interference layer (13) is fixedly connected to the outside of the sealing layer (14), a fire-resistant layer (12) is fixedly connected to the outside of the anti-interference layer (13), and an outer protective layer (11) is fixedly connected to the outside of the fire-resistant layer (12).
3. The steel-tape armored fire-resistant cable according to claim 1, characterized in that, The conductive component (22) includes a reinforcing layer (221), a plurality of insulating layers (222) are fixedly connected inside the reinforcing layer (221), a conductor layer (223) is fixedly connected inside the insulating layer (222), and a plurality of filling layers (224) are fixedly connected inside the reinforcing layer (221).
4. A steel-tape armored fire-resistant cable according to claim 2, characterized in that, The outer side of the inner protective layer (21) is fixedly connected to the inside of the sealing layer (14), and the outer side of the inner protective layer (21) is sleeved inside the non-metallic reinforcing fiber layer (24).
5. A steel-tape armored fire-resistant cable according to claim 2, characterized in that, The outer protective layer (11) is disposed outside the protective mechanism (1) and the inner protective layer (21) is disposed outside the metal armor layer (23).
6. A steel-tape armored fire-resistant cable according to claim 2, characterized in that, The metal armor layer (23) is fixedly connected inside the sealing layer (14), and the inside of the sealing layer (14) is fixedly connected to the outside of the non-metallic reinforcing fiber layer (24).
7. A steel-tape armored fire-resistant cable according to claim 3, characterized in that, The inner protective layer (21) is fixedly connected to the outside of the reinforcing layer (221), and the inner protective layer (21) is fixedly connected to the outside of the filling layer (224).
8. A steel-tape armored fire-resistant cable according to claim 3, characterized in that, The outer side of the filling layer (224) is disposed inside the reinforcing layer (221), and the outer side of the conductor layer (223) is disposed inside the reinforcing layer (221).