Low-smoke halogen-free fireproof cable
By adopting a multi-layer fire protection design in the cable, including five cable cores, central reinforcements, five-pointed star partitions and alkali-free glass fiber filling layer, combined with flame retardant and fire-resistant protective layer and thermal insulation layer, traditional cables are solved The problems of flammability and cable core interference in fires have achieved high fire resistance and signal stability of the cable.
Patent Information
- Application Number
- CN202323558862.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-12-25
AI Technical Summary
The flammability problem of traditional cables in fires causes the fire to spread rapidly, and the mutual interference between cable cores leads to signal distortion, affecting the performance and safety of the cable system.
Adopt a layered structure of five cable cores, central reinforcement, pentagram-shaped separator and alkali-free glass fiber filling layer, combining the first flame retardant and refractory protective layer, high flame retardant and heat-retardant and refractory protective layer With mineral insulated fire protection layer, a multi-layer fire protection design is formed to improve the mechanical strength and signal stability of the cable.
Effectively suppress the spread of fire, reduce the generation of harmful gases and smoke, improve the fire resistance and signal transmission stability of cables under fire conditions, and ensure the safety and reliability of the cable system.
Smart Images
Figure CN222167992U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cables, in particular to a low-smoke, halogen-free, fire-resistant cable. Background Art
[0002] In the field of power engineering, especially in cable design, the research on fire-resistant cables has attracted much attention. The widespread use of electrical equipment in modern society has brought more frequent fire threats, especially fires caused by electrical reasons. This has put forward more stringent requirements on the fire resistance of electrical equipment, especially cables. The inherent flammability of traditional cables in fires causes the fire to spread rapidly, posing a huge threat to equipment and personnel. In addition, the lack of effective isolation of the cable core in the cable system is prone to mutual interference, which may cause signal distortion and even damage the performance of the entire cable system.
[0003] Therefore, the challenge facing current cable technology is how to improve the fire resistance of cables and ensure that cables do not become a medium for fire transmission when a fire occurs. At the same time, solving the problem of mutual interference between cable cores and ensuring the stability of signal transmission are technical problems that need to be solved urgently in the field of cable design. In this context, the research on fire-resistant cables has become crucial to ensure that the cable system can provide safer and more reliable power transmission and communication functions under fire conditions. Utility Model Content
[0004] In view of the above situation, the utility model mainly solves the technical problems existing in the fire resistance of traditional cables in the prior art and the mutual interference in multi-core cables, and provides a low-smoke halogen-free fire-resistant cable. Through a reasonably designed layer-by-layer structure, the cable core is composed of five cable cores, a central reinforcement, a five-pointed star-shaped separator and an alkali-free glass fiber filling layer, which improves the mechanical strength and structural stability of the cable. At the same time, in terms of fire protection, the superimposed design of the first flame retardant and fire-resistant protective layer, the high flame retardant and thermal insulation layer, the second flame retardant and fire-resistant protective layer, and the mineral insulation fireproof layer protects the cable in all directions, thereby providing a more reliable protection and operating environment for electrical equipment in the event of fire.
[0005] To achieve this object, the utility model provides a low-smoke halogen-free fire-resistant cable, which includes, from the inside to the outside, a cable core, a first flame-retardant fire-resistant protective layer, a highly flame-retardant heat-insulating layer, a second flame-retardant fire-resistant protective layer, a mineral insulation fireproof layer and an outer sheath, the cable core comprising five cable cores, a central reinforcement, a five-pointed star-shaped separator and an alkali-free glass fiber filling layer, the cable core is provided with a conductor, a fire-resistant mica tape and a ceramic mineral insulation layer in sequence from the inside to the outside, the central reinforcement is arranged at the center of the cable, the five-pointed star-shaped separator is fitted on the outside of the central reinforcement, and the cable core is provided between the two corners of the five-pointed star-shaped separator on a side away from the central reinforcement, and the gap between the five-pointed star-shaped separator and the cable core is filled with the alkali-free glass fiber filling layer.
[0006] Preferably, the five-pointed star-shaped separator is made of thermoplastic elastomer (TPE). TPE material has good elasticity and softness, can better fit the central reinforcement, and ensure the firmness of the separator. This design makes the cable separation more flexible, helps to adapt to the bending and stretching of the cable in different environments, and improves the durability and reliability of the cable.
[0007] Preferably, the first flame retardant and fireproof protective layer is a halogen-free flame retardant silicone rubber layer. The halogen-free flame retardant silicone rubber layer has excellent flame retardant properties, can effectively slow down the spread of flames, and reduce the generation of harmful gases and smoke. In addition, the silicone rubber material remains stable in high temperature environments, providing reliable fire protection.
[0008] Preferably, the high flame retardant insulation layer adopts a low-smoke halogen-free silicone ceramic insulation layer. The high flame retardant insulation layer adopting the low-smoke halogen-free silicone ceramic insulation layer has good thermal insulation performance, helps to prevent the spread of flames, slow down the temperature rise, and improve the fire resistance of the cable under fire conditions. At the same time, the low-smoke halogen-free design reduces the generation of harmful gases and smoke, and improves the safety of the fire scene.
[0009] Preferably, the second flame retardant and fire resistant protective layer is a high-performance glass fiber tape. As the second flame retardant and fire resistant protective layer, the high-performance glass fiber tape provides an additional layer of protection and increases the fire resistance of the cable. The glass fiber material has good tensile strength and fire resistance, can effectively resist the damage of fire sources, and ensure the structural integrity of the cable.
[0010] Preferably, the mineral insulation fireproof layer is a galvanized steel belt armor layer. As a mineral insulation fireproof layer, the galvanized steel belt armor layer provides excellent mechanical protection, resists external physical damage, and has fireproof properties. This helps prevent the cable from being damaged externally and improves the durability and reliability of the cable.
[0011] Preferably, the outer sheath is made of an inorganic hydroxide flame retardant composite material. As an outer sheath, the inorganic hydroxide flame retardant composite material has excellent flame retardant properties and effectively slows down the spread of flames. This design meets environmental protection requirements, reduces the release of harmful gases, and improves the safety of the cable in a fire.
[0012] Preferably, the central reinforcement is a glass fiber member. The glass fiber member as the central reinforcement member increases the mechanical strength and tensile strength of the cable, which helps to maintain the shape stability of the cable and improve the adaptability and durability of the cable under different working conditions.
[0013] Beneficial effects of the utility model: The low-smoke, halogen-free, fire-resistant cable provided by the utility model ensures the stability, durability and safety of the cable under extreme conditions through a reasonable layer-by-layer design. First, by adopting a cable core composed of five cable cores, a central reinforcement, a five-pointed star-shaped separator and an alkali-free glass fiber filling layer, the mechanical strength and structural stability of the cable are effectively improved. The setting of the central reinforcement increases the overall tensile strength of the cable, and the introduction of the five-pointed star-shaped separator effectively separates the cable cores, reduces the electromagnetic interference between each other, and improves the performance stability of the cable. The design of the separator helps to maintain the overall structure of the cable and prevent the chaotic arrangement of the cable core. The alkali-free glass fiber filling layer fills the gap between the five-pointed star-shaped separator and the cable core, providing additional insulation and support, which helps to maintain the shape of the cable. Secondly, the layer-by-layer design of the conductor, the fire-resistant mica tape and the ceramicized mineral insulation layer ensures the electrical conductivity and fire resistance of the cable under high temperature conditions. This not only increases the survivability of the cable in a fire, but also provides the cable with stable electrical properties. Finally, in terms of fire protection, the cable is fully protected under fire conditions through the clever superposition of the first flame retardant and fireproof protective layer, the high flame retardant and heat insulation layer, the second flame retardant and fireproof protective layer, and the mineral insulation fireproof layer. The multi-layer flame retardant and fireproof design effectively suppresses the spread of fire, reduces the emission of harmful gases and smoke, and protects the integrity and safety of the cable. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a structural schematic diagram of the low-smoke, halogen-free, fire-resistant cable provided by the utility model;
[0015] In the figure: 1-cable core, 11-conductor, 12-fire-resistant mica tape, 13-ceramic mineral insulation layer, 2-center reinforcement, 3-five-pointed star-shaped separator, 4-alkali-free glass fiber filling layer, 5-first flame retardant and fire-resistant protective layer, 6-high flame retardant and thermal insulation layer, 7-second flame retardant and fire-resistant protective layer, 8-mineral insulation fireproof layer, 9-outer sheath. DETAILED DESCRIPTION
[0016] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0017] Example
[0018] See also Figure 1 The utility model provides a low-smoke halogen-free fire-resistant cable, which includes a cable core, a first flame-retardant fire-resistant protective layer 5, a high flame-retardant heat-insulating layer 6, a second flame-retardant fire-resistant protective layer 7, a mineral insulation fireproof layer 8 and an outer sheath 9 from the inside to the outside.
[0019] See also Figure 1 The cable core comprises five cable cores 1, a central reinforcement 2, a five-pointed star-shaped separator and an alkali-free glass fiber filling layer 4. The cable core 1 is provided with a conductor 11, a fire-resistant mica tape 12 and a ceramic mineral insulation layer 13 from the inside to the outside. The conductor 11 is a copper conductor. The central reinforcement 2 is arranged at the center of the cable. The five-pointed star-shaped separator is fitted on the outside of the central reinforcement 2, and the cable core 1 is arranged between the two corners of the five-pointed star-shaped separator on the side away from the central reinforcement 2. The gap between the five-pointed star-shaped separator and the cable core 1 is filled with the alkali-free glass fiber filling layer 4. Preferably, the five-pointed star-shaped separator is made of thermoplastic elastomer (TPE). TPE material has good elasticity and softness, can better fit the central reinforcement 2, and ensure the firmness of the separator. This design makes the cable separation more flexible, helps to adapt to the bending and stretching of the cable in different environments, and improves the durability and reliability of the cable. Preferably, the central reinforcement 2 is a glass fiber piece. The glass fiber piece serves as the central reinforcement member 2, which increases the mechanical strength and tensile resistance of the cable. This helps to maintain the shape stability of the cable and improves the adaptability and durability of the cable under different working conditions.
[0020] Preferably, the first flame retardant and fireproof protective layer 5 is a halogen-free flame retardant silicone rubber layer. The halogen-free flame retardant silicone rubber layer has excellent flame retardant properties, can effectively slow down the spread of flames, and reduce the generation of harmful gases and smoke. In addition, the silicone rubber material remains stable in a high temperature environment, has excellent fire resistance, can resist open flame erosion, protect the cable core 1 structure from damage, and provide reliable fire protection.
[0021] Preferably, the high flame retardant insulation layer 6 adopts a low-smoke halogen-free silicone ceramic insulation layer. The high flame retardant insulation layer 6 adopting a low-smoke halogen-free silicone ceramic insulation layer has good thermal insulation performance, helps to prevent the spread of flames, slow down the temperature rise, and improve the fire resistance of the cable under fire conditions. At the same time, the low-smoke halogen-free design reduces the generation of harmful gases and smoke, and improves the safety of the fire scene.
[0022] Preferably, the second flame retardant and fire resistant protective layer 7 is a high-performance glass fiber tape. As the second flame retardant and fire resistant protective layer 7, the high-performance glass fiber tape provides an additional layer of protection, increases the fire resistance of the cable, and can resist open flame erosion and protect the internal structure from being damaged under large external force impact conditions. The glass fiber material has good tensile strength and fire resistance, can effectively resist fire damage, and ensure the structural integrity of the cable.
[0023] Preferably, the mineral insulation fireproof layer 8 is a galvanized steel belt armor layer. As a mineral insulation fireproof layer 8, the galvanized steel belt armor layer provides superior mechanical protection, resists external physical damage, and has fireproof properties. This helps to prevent the cable from being damaged externally and improves the durability and reliability of the cable. The role of the mineral insulation fireproof layer 8 in fire prevention is mainly to provide mechanical protection, block damage from external objects, and resist external pressure and impact that may occur in a fire. Although the mineral insulation fireproof layer 8 can block the direct spread of flames to a certain extent, it cannot completely block the transfer of heat to the inside, so other levels of fireproof design are required to work together. Therefore, in terms of fire protection, through the clever superposition of the first flame retardant and fireproof protective layer 5, the high flame retardant and heat-insulating layer 6, the second flame retardant and fireproof protective layer 7, and the mineral insulation fireproof layer 8, the cable is fully protected under fire conditions.
[0024] Preferably, the outer sheath 9 is made of an inorganic hydroxide flame retardant composite material. The inorganic hydroxide flame retardant composite material as the outer sheath 9 has excellent flame retardant properties and effectively slows down the spread of flames. This design meets environmental protection requirements, reduces the release of harmful gases, and improves the safety of the cable in a fire.
[0025] The low-smoke, halogen-free, fire-resistant cable provided by the utility model ensures the stability, durability and safety of the cable under extreme conditions through reasonable layer-by-layer design.
[0026] First, by adopting the cable core composed of five cable cores 1, a central reinforcement 2, a five-pointed star-shaped separator and an alkali-free glass fiber filling layer 4, the mechanical strength and structural stability of the cable are effectively improved. The setting of the central reinforcement 2 increases the overall tensile strength of the cable, and the introduction of the five-pointed star-shaped separator effectively separates the cable cores 1, reduces the electromagnetic interference between each other, and improves the performance stability of the cable. The design of the separator helps to maintain the overall structure of the cable and prevent the chaotic arrangement of the cable core 1. The alkali-free glass fiber filling layer 4 fills the gap between the five-pointed star-shaped separator and the cable core 1, providing additional insulation and support, which helps to maintain the shape of the cable.
[0027] Secondly, the layered design of the conductor 11, the fire-resistant mica tape 12 and the ceramicized mineral insulation layer 13 ensures the electrical conductivity and fire resistance of the cable under high temperature conditions. This not only increases the cable's ability to survive a fire, but also provides the cable with stable electrical properties.
[0028] Finally, in terms of fire protection, the cable is fully protected under fire conditions by cleverly stacking the first flame retardant and fireproof protective layer 5, the high flame retardant and heat-insulating layer 6, the second flame retardant and fireproof protective layer 7, and the mineral insulation fireproof layer 8 from the inside to the outside. The first is the first flame retardant and fireproof protective layer 5 composed of halogen-free flame retardant silicone rubber layer. The silicone rubber material remains stable in high temperature environment, has excellent fire resistance, can resist open flame burning, and protects the cable core 1 structure from damage; second, the low-smoke halogen-free silicone ceramic insulation layer is used as the high flame retardant and heat-insulating layer 6. Its excellent heat insulation performance effectively isolates the heat from transferring to the inside, and improves the fire resistance of the cable in high temperature environment. Third, the second flame retardant and fireproof protective layer 7 uses high-performance glass fiber tape to enhance the tensile strength and fire resistance of the cable, ensuring that the structure remains intact under the attack of fire. Fourth, the mineral insulation fireproof layer 8 composed of galvanized steel belt armor provides excellent mechanical protection for the cable, not only resisting external physical damage, but also having fireproof properties. These levels of flame retardant and fire-resistant designs effectively suppress the spread of fire, reduce the emission of harmful gases and smoke, and protect the integrity and safety of the cables.
[0029] The above description is only a specific implementation scheme of the utility model, but those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Therefore, equivalent changes made to the scope of the patent application of the utility model still fall within the scope covered by the utility model.
Claims
1. A low-smoke halogen-free fire-resistant cable, characterized by: It includes a cable core, a first flame retardant and fireproof protective layer, a highly flame retardant and heat-insulating layer, a second flame retardant and fireproof protective layer, a mineral insulating fireproof layer and an outer sheath from the inside to the outside. The cable core includes five cable cores, a central reinforcement, a five-pointed star-shaped separator and an alkali-free glass fiber filling layer. The cable core is provided with a conductor, a fire-resistant mica tape and a ceramicized mineral insulating layer in sequence from the inside to the outside. The central reinforcement is arranged at the center of the cable, the five-pointed star-shaped separator is fitted on the outside of the central reinforcement, and the cable core is arranged between the two corners of the five-pointed star-shaped separator on the side away from the central reinforcement, and the gap between the five-pointed star-shaped separator and the cable core is filled with the alkali-free glass fiber filling layer.
2. The low-smoke halogen-free fire-resistant cable according to claim 1, characterized in that: The five-pointed star-shaped separator is made of thermoplastic elastomer (TPE).
3. The low-smoke halogen-free fire-resistant cable according to claim 1, characterized in that: The first flame retardant and fire resistant protective layer is a halogen-free flame retardant silicone rubber layer.
4. The low-smoke halogen-free fire-resistant cable according to claim 1, characterized in that: The highly flame-retardant heat-insulating layer adopts a low-smoke halogen-free silicon ceramic adhesive heat-insulating layer.
5. The low-smoke halogen-free fire-resistant cable according to claim 1, characterized in that: The second flame retardant and fire resistant protective layer is a high performance glass fiber tape.
6. The low-smoke halogen-free fire-resistant cable according to claim 1, characterized in that: The mineral insulation fireproof layer is a galvanized steel belt armor layer.
7. The low-smoke halogen-free fire-resistant cable according to claim 1, characterized in that: The outer sheath is made of an inorganic hydroxide flame-retardant composite material.
8. The low-smoke halogen-free fire-resistant cable according to claim 1, characterized in that: The central reinforcement member is a glass fiber member.