Flexible fibre fire resistant cable

Abstract

This utility model relates to the field of fire-resistant cable technology and discloses a flexible fiber fire-resistant cable, including an outer sheath. An oxygen-barrier mineral fire-resistant mud is disposed in the middle of the inner side of the outer sheath. An alkali-free glass fiber wrapping tape is disposed inside the oxygen-barrier mineral fire-resistant mud. A mineral filler is disposed in the middle of the inner side of the alkali-free glass fiber wrapping tape. Multiple ceramicized silicone rubber outer insulations are disposed inside the mineral filler. A mica tape fire-resistant layer is disposed in the middle of the inner side of the ceramicized silicone rubber outer insulation. The conductor cross-sectional area of ​​this utility model is [square mm], and the cable has a single-core structure. It can form a porous, highly foamed thermal resistance material at high temperatures. Therefore, this cable has excellent fire resistance, high flexibility, and good electrical transmission performance. It can work stably for a long time in complex environments and meet daily use needs.

Description

Technical Field

[0001] This utility model relates to the field of fireproof cable technology, and in particular to a flexible fiber fireproof cable. Background Technology

[0002] Against the backdrop of continuous upgrading of power infrastructure construction and accelerated digital transformation, cables, as a key carrier of power transmission, directly affect power safety and system stability. With increasingly stringent requirements for cable fire resistance, flexibility, and spatial adaptability in high-rise buildings, rail transit, data centers, and other scenarios, traditional cable technology is struggling to meet diverse application needs. Cables exhibit significant shortcomings in fire resistance; while flame-retardant materials are often used for insulation, they only delay the spread of fire. When exposed to high temperatures and open flames, the insulation layer and sheath are prone to rapid charring, leading to cable failure or even short circuits, thus exacerbating fire hazards.

[0003] With increasingly stringent requirements for cable fire resistance, flexibility, and spatial adaptability in high-rise buildings, rail transit, and data centers, cable technology is struggling to meet diverse application needs. Cables have significant shortcomings in fire resistance; most are wrapped with flame-retardant materials, which can only delay the spread of fire. When exposed to high temperatures and open flames, the insulation layer and sheath are prone to rapid carbonization, leading to cable failure or even short circuits and exacerbating fire hazards. While existing fire-resistant cables have improved in fire resistance, they are insufficient in flexibility, especially when used in complex environments (such as bending and vibration), where mechanical stress can easily cause cable damage. Furthermore, the fire-resistant materials in traditional fire-resistant cables may fail at high temperatures, failing to meet long-term fire resistance requirements. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a flexible fiber fireproof cable, which aims to improve the shortcomings of existing cables in terms of flexibility, especially in complex environments such as bending and vibration, where mechanical stress can easily cause cable damage and the cable cannot meet long-term fire protection requirements.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a flexible fiber fireproof cable, comprising an outer sheath, wherein an oxygen-barrier mineral fireproof mud is provided in the middle of the inner side of the outer sheath, an alkali-free glass fiber wrapping tape is provided inside the oxygen-barrier mineral fireproof mud, a mineral filler is provided in the middle of the inner side of the alkali-free glass fiber wrapping tape, a plurality of ceramicized silicone rubber outer insulations are provided in the inner side of the mineral filler, a mica tape fireproofing is provided in the middle of the inner side of the ceramicized silicone rubber outer insulations, and a conductor is provided in the middle of the inner side of the mica tape fireproofing.

[0006] As a further description of the above technical solution:

[0007] The oxygen-barrier mineral fireproof putty can expand and foam at high temperatures to form a hard ceramic shell, effectively blocking heat transfer and preventing the spread of fire.

[0008] As a further description of the above technical solution:

[0009] The outer sheath is made of high flame retardant, low smoke, halogen-free flame retardant polyolefin sheath material.

[0010] As a further description of the above technical solution:

[0011] The ceramicized silicone rubber external insulation adopts a composite insulation layer consisting of wrapped fluorine-gold synthetic mica tape and extruded ceramicized silicone rubber.

[0012] As a further description of the above technical solution:

[0013] The conductor has a cross-sectional area of ​​2.5 to 240 mm². The 240 mm² square cable is a single-core structure with a circular geometry, and is made by regularly twisting several soft round copper wires of the same diameter together concentrically.

[0014] As a further description of the above technical solution:

[0015] The alkali-free glass fiber wrapping tape is used to tighten the cable and has a certain fire-proof and heat-insulating function.

[0016] As a further description of the above technical solution:

[0017] The outer sheath adopts a circular design.

[0018] This utility model has the following beneficial effects:

[0019] The cable has a conductor cross-sectional area of ​​[square meters] and a single-core structure with a circular geometry. It is composed of several soft, round copper wires of the same diameter, concentrically twisted in a regular pattern. It is fire-resistant using a double-layer mica tape made of fluorine-gold composite material. This mica tape uses fluoride ions instead of hydroxyl groups for fire resistance and has a certain degree of fire-resistant and heat-insulating function. Processed using nanotechnology, it can form a porous, highly foamed thermally resistive material at high temperatures, imparting fire resistance to the fire-retardant material. During high-temperature combustion, it produces moisture, which acts as a cooling and fire-insulating agent. Therefore, this cable possesses excellent fire resistance, high flexibility, and good electrical transmission performance. It can operate stably for a long time in complex environments and meet daily usage needs. Attached Figure Description

[0020] Figure 1 This is a front perspective view of a flexible fiber fireproof cable according to the present invention;

[0021] Figure 2 This is a partial structural exploded view of a flexible fiber fireproof cable according to the present invention;

[0022] Figure 3 This is a partial structural diagram of a flexible fiber fireproof cable according to the present invention;

[0023] Figure 4 This is a partial structural diagram of a flexible fiber fireproof cable according to the present invention.

[0024] Legend:

[0025] 1. Conductor; 2. Mica tape for fireproofing; 3. Ceramicized silicone rubber outer insulation; 4. Mineral filler; 5. Alkali-free glass fiber wrapping tape; 6. Oxygen-barrier mineral fireproof putty; 7. Outer sheath. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see the appendix Figure 1 - Appendix Figure 3 This utility model provides an embodiment of a flexible fiber fireproof cable, including an outer sheath 7. An oxygen-barrier mineral fireproof mud 6 is disposed in the middle of the inner side of the outer sheath 7. An alkali-free glass fiber wrapping tape 5 is disposed inside the oxygen-barrier mineral fireproof mud 6. A mineral filler 4 is disposed in the middle of the inner side of the alkali-free glass fiber wrapping tape 5. Multiple ceramicized silicone rubber outer insulations 3 are disposed inside the inner side of each mineral filler 4. A mica tape fireproof 2 is disposed in the middle of the inner side of each ceramicized silicone rubber outer insulation 3. A conductor 1 is disposed in the middle of the inner side of each mica tape fireproof 2. The outer sheath 7 is made of high flame-retardant, low-smoke, halogen-free flame-retardant polyolefin sheath material.

[0028] Specifically, using the outer sheath 7 as the outermost protective barrier, a layer of alkali-free glass fiber wrapping tape 5 is wrapped inside the oxygen-barrier mineral fireproof mud 6. The alkali-free glass fiber wrapping tape 5 has good insulation performance and strength. It is woven from alkali-free glass fiber and has good electrical insulation properties. It can effectively prevent current leakage and ensure the safety and stability of the cable in the process of transmitting electrical energy. At the same time, the alkali-free glass fiber wrapping tape 5 can also withstand a certain amount of tension and pressure, providing solid support for the mineral filling structure 4 inside the cable, preventing deformation and displacement due to external forces during installation and use, and ensuring the integrity and stability of the cable structure.

[0029] Please see the appendix Figure 2 - Appendix Figure 4 The ceramicized silicone rubber external insulation 3 uses a composite insulation layer of wrapped fluorinated gold synthetic mica tape and extruded ceramicized silicone rubber. The fluorinated gold mica tape uses fluoride ions instead of hydroxyl groups to synthesize artificial mica with large size and complete crystal structure under normal pressure. In addition to the characteristics of natural mica tape, such as small expansion coefficient, high dielectric strength, high resistivity and uniform dielectric constant, its main feature is high heat resistance, reaching Class A fire resistance level. The ceramicized silicone rubber external insulation has excellent fire resistance, flame retardancy, low smoke and non-toxicity. The extrusion molding process is simple. Its residue after combustion is a hard ceramicized shell. The hard shell does not melt or drip in a fire environment. It can pass the circuit integrity test at 950℃-1000℃ for 180 minutes and then cooled for 15 minutes. It is suitable for any place requiring fire protection. This material has excellent electrical insulation performance, thermal aging performance, mechanical properties and can also provide moisture protection.

[0030] The mineral filler 4 is made from minerals prepared using nanotechnology. It has advantages such as fire resistance, heat resistance, high temperature resistance, heat insulation, and heat insulation. It also has good flame retardant and heat absorption properties, making the entire cable core round and full, and blocking the entry of air as much as possible.

[0031] Oxygen-barrier mineral fireproof putty 6 can expand and foam at high temperatures to form a hard ceramic shell, effectively blocking heat transfer and preventing the spread of fire. Its main component, magnesium oxide, has a melting point as high as 2800℃, which can maintain the integrity of the cable under extreme high temperatures.

[0032] The cross-sectional area of ​​conductor 1 is 2.5–240 mm². 2 240mm 2 The square cable has a single-core structure and a circular geometry. It is made by regularly twisting several soft round copper wires of the same diameter together. The alkali-free glass fiber wrapping tape 5 serves to tighten the cable and also has a certain fireproof and heat insulation function.

[0033] The outer sheath 7 adopts a circular design and is made of high flame retardant, low smoke, halogen-free flame retardant polyolefin sheath material. This material has excellent flame retardant, halogen-free, low smoke, and non-toxic properties.

[0034] Specifically, the alkali-free glass fiber wrapping tape 5 is tightly wrapped around the cable, providing a stable restraint for the various components inside the cable. This tightening effect not only ensures the integrity of the cable structure, enabling it to maintain a stable shape when subjected to external forces, but also ensures that the cable structure is intact. The alkali-free glass fiber wrapping tape 5 is made of alkali-free glass fiber, a material with excellent high-temperature resistance and insulation properties.

[0035] The circular outer sheath 7 can evenly distribute these external forces, reduce local stress concentration, and lower the risk of cable damage.

[0036] Working Principle: The cable, with a cross-sectional area of ​​1 square millimeters, is a single-core structure with a circular geometry. It is composed of several soft, round copper wires of the same diameter, concentrically twisted in a regular pattern. It is combined with a fire-resistant mica tape 2, which uses a fluorine-gold composite double-layer mica tape. This fire-resistant mica tape 2 uses fluoride ions instead of hydroxyl groups, synthesizing large-sized, crystalline artificial mica under normal pressure. Simultaneously, the ceramicized silicone rubber outer insulation 3 possesses excellent fire-retardant, flame-retardant, low-smoke, and non-toxic properties. The extrusion molding process is simple, and the residue after combustion is a hard ceramicized shell that does not melt or drip in a fire environment. This material is based on magnesium oxide and aluminum oxide. The material, alkali-free fiberglass wrapping tape 5, is alkali-free fiberglass wrapping tape. This wrapping tape is white, smooth, undamaged, with uniform fabric, good insulation performance, and extremely strong tensile strength. It will not wrinkle or break, is resistant to sulfurization, smokeless, halogen-free, non-toxic, and non-flammable in pure oxygen. It serves to tighten the cable and also has a certain fire-resistant and heat-insulating function. Processed using nanotechnology, it can form a porous, highly foamed thermal resistance material at high temperatures, giving the fireproof sealant fireproof, heat-insulating, and sealing properties. When burning at high temperatures, it produces moisture, which plays a role in cooling and fire isolation. Therefore, this cable has excellent fire resistance, high flexibility, and good electrical transmission performance. It can work stably for a long time in complex environments and meet daily usage needs.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flexible fiberoptic fire resistant cable comprising an outer jacket (7) characterized by: The inner middle of the outer sheath (7) is provided with oxygen-barrier mineral fireproof mud (6), the inside of the oxygen-barrier mineral fireproof mud (6) is provided with alkali-free glass fiber wrapping tape (5), the inner middle of the alkali-free glass fiber wrapping tape (5) is provided with mineral filler (4), the inner side of the mineral filler (4) is provided with multiple ceramicized silicone rubber outer insulation (3), the inner middle of the ceramicized silicone rubber outer insulation (3) is provided with mica tape fireproof (2), and the inner middle of the mica tape fireproof (2) is provided with conductor (1).

2. A flexible fiberoptic fire resistant cable according to claim 1, characterized in that: The oxygen-barrier mineral fireproof mud (6) can expand and foam at high temperatures to form a hard ceramic shell.

3. A flexible fiberoptic fire resistant cable according to claim 1 wherein: The outer sheath (7) is made of high flame retardant, low smoke, halogen-free flame retardant polyolefin sheath material.

4. A flexible fiberoptic fire resistant cable according to claim 1 wherein: The ceramicized silicone rubber external insulation (3) adopts a composite insulation layer of wrapped fluorine-gold synthetic mica tape and extruded ceramicized silicone rubber.

5. A flexible fiberoptic fire resistant cable according to claim 1 wherein: The cross-sectional area of ​​the conductor (1) is 2.5 to 240 mm². 2 It is made by regularly twisting several soft round copper wires of the same diameter together concentrically.

6. A flexible fiberoptic fire resistant cable according to claim 1 wherein: The alkali-free glass fiber wrapping tape (5) is used to wrap the cable core with alkali-free glass fiber tape and tighten the cable.

7. A flexible fiberoptic fire resistant cable according to claim 1 wherein: The outer sheath (7) adopts a circular design.

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