A high temperature resistant fireproof ceramicized silicone rubber cable

Abstract

The utility model relates to cable technical field discloses a kind of high-temperature-resistant fire-resistant ceramicized silicone rubber cables, including several conductors and support framework, the support framework is located in several conductors inside, and support framework surface is equipped with spacer sleeve, several conductor outside is collectively wound with wrapping layer, the gap between wrapping layer and several conductors is equipped with filling layer, the wrapping layer surface is wrapped with shielding layer, the shielding layer surface is wrapped with braiding layer.In the utility model, by setting support framework, conductor, wrapping layer, filling layer, shielding layer, braiding layer, armoring layer, first insulating layer, fire-resistant ceramic layer and second insulating layer, by adding high-strength support framework in cable structure.Support framework is spiral, the overall tensile strength of cable is enhanced by support framework, on the other hand, when cable is subjected to external shear force, it can play a role in dispersing stress, prevent fire-resistant ceramic layer from breaking due to stress concentration.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a high-temperature resistant, fire-resistant, ceramicized silicone rubber cable. Background Technology

[0002] High-temperature and fire-resistant ceramicized silicone rubber cable is a new type of high-polymer fire-resistant cable. At room temperature, it exhibits the good flexibility and elasticity of ordinary silicone rubber cables, as well as excellent electrical insulation, high and low temperature resistance, and weather aging resistance, enabling it to adapt to various complex environments. Upon exposure to high-temperature flames, the ceramicized silicone rubber insulation layer of this cable reacts rapidly, sintering into a hard ceramic-like shell within minutes. This hard shell acts like a robust armor, withstanding temperatures of 950℃-1000℃ for up to 90 minutes. Even after a 15-minute cooling process, it maintains the integrity of the circuit, effectively isolating flames, blocking heat conduction, preventing short circuits or open circuits in the internal conductors, and ensuring stable power and communication transmission.

[0003] However, existing high-temperature resistant and fire-resistant ceramicized silicone rubber cables still have the following drawbacks:

[0004] 1. Before ceramicization, the mechanical strength of ceramized silicone rubber is relatively low compared with traditional high-strength rubber materials at room temperature, such as tensile strength and tear strength, which limits its performance in scenarios that require large tensile or shear forces. After ceramicization, the strength and hardness of the ceramic-like shell formed are different from those of real ceramic materials, and it cannot provide sufficient mechanical protection under extreme conditions.

[0005] 2. The "ceramic" structure formed by sintering a single organosilicon chain combination of silicon oxide family is unstable. The ceramicized silicone rubber after combustion is brittle and prone to cracking, forming conductive channels, which leads to unstable fire resistance.

[0006] Therefore, this utility model proposes a high-temperature resistant, fire-resistant, ceramicized silicone rubber cable to address the above-mentioned shortcomings. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-temperature resistant, fire-resistant, ceramicized silicone rubber cable.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a high-temperature resistant, fire-resistant, ceramicized silicone rubber cable, comprising a plurality of conductors and a supporting skeleton, wherein the supporting skeleton is located inside the plurality of conductors and a spacer is provided on the surface of the supporting skeleton, a wrapping layer is wound around the outside of the plurality of conductors, a filling layer is provided in the gap between the wrapping layer and the plurality of conductors, a shielding layer is wrapped on the surface of the wrapping layer, a braided layer is wrapped on the surface of the shielding layer, an armor layer is wrapped on the surface of the braided layer, a first insulating layer is wrapped on the surface of the armor layer, a fire-resistant ceramic layer is wrapped on the surface of the first insulating layer, a buffer layer is wrapped on the surface of the fire-resistant ceramic layer, and a second insulating layer is wrapped on the surface of the buffer layer.

[0009] As a further description of the above technical solution:

[0010] The supporting frame is spiral-shaped.

[0011] As a further description of the above technical solution:

[0012] The spacer, the first insulating layer, and the second insulating layer are all made of cross-linked polyethylene material.

[0013] As a further description of the above technical solution:

[0014] The wrapping layer is made of non-woven fabric, the filling layer is made of filling rope, the shielding layer is made of metal woven mesh, and the armor layer is made of steel strip.

[0015] As a further description of the above technical solution:

[0016] The braided layer is made of aramid fiber material.

[0017] As a further description of the above technical solution:

[0018] The refractory ceramic layer is made of ceramicized silicone rubber, and the buffer layer is made of aerogel felt.

[0019] This utility model has the following beneficial effects:

[0020] 1. In this utility model, a high-strength support frame is added to the cable structure by setting up a support frame, conductor, wrapping layer, filling layer, shielding layer, braided layer, armor layer, first insulation layer, refractory ceramic layer, and second insulation layer. The support frame is spiral-shaped, which enhances the overall tensile strength of the cable and disperses stress when the cable is subjected to external shear force, preventing the refractory ceramic layer from cracking due to stress concentration. Simultaneously, a braided layer is added between the refractory ceramic layer and the conductor. This braided layer has high strength and high modulus characteristics, which can effectively improve the mechanical strength of the cable before ceramicization and maintain stable performance at high temperatures without affecting the fire resistance of the refractory ceramic layer.

[0021] 2. In this utility model, by setting a refractory ceramic layer, a buffer layer, and a second insulation layer, the buffer layer is located outside the refractory ceramic layer. When the cable is subjected to external impact or thermal stress, the flexible buffer layer can absorb some of the energy, reduce the damage to the refractory ceramic layer, and avoid cracks in the ceramic structure caused by external force, thereby ensuring stable fire resistance performance. Attached Figure Description

[0022] Figure 1 This is a main sectional view of the present invention;

[0023] Figure 2 This is a three-dimensional view of the supporting frame of this utility model;

[0024] Figure 3 For the present utility model Figure 1 Enlarged view of point A in the middle.

[0025] Legend:

[0026] 1. Support frame; 2. Spacer; 3. Conductor; 4. Wrapping layer; 5. Filler layer; 6. Shielding layer; 7. Braided layer; 8. Armoring layer; 9. First insulation layer; 10. Refractory ceramic layer; 11. Buffer layer; 12. Second insulation layer. Detailed Implementation

[0027] 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.

[0028] Reference Figures 1-3 The present invention provides an embodiment of a high-temperature resistant and fire-resistant ceramicized silicone rubber cable, comprising a plurality of conductors 3 and a support frame 1. The support frame 1 is located inside the plurality of conductors 3, and a spacer 2 is provided on the surface of the support frame 1. A wrapping layer 4 is wound around the outside of the plurality of conductors 3. A filling layer 5 is provided in the gap between the wrapping layer 4 and the plurality of conductors 3. A shielding layer 6 is wrapped on the surface of the wrapping layer 4. A braided layer 7 is wrapped on the surface of the shielding layer 6. An armor layer 8 is wrapped on the surface of the braided layer 7. A first insulation layer 9 is wrapped on the surface of the armor layer 8. A fire-resistant ceramic layer 10 is wrapped on the surface of the first insulation layer 9. A buffer layer 11 is wrapped on the surface of the fire-resistant ceramic layer 10. A second insulation layer 12 is wrapped on the surface of the buffer layer 11.

[0029] In this embodiment, the support frame 1 is spiral-shaped. The support frame 1 is made of titanium alloy or high-strength aluminum alloy. On the one hand, the support frame 1 enhances the overall tensile strength of the cable, and on the other hand, it can disperse stress when the cable is subjected to external shear force, preventing the refractory ceramic layer 10 from cracking due to stress concentration.

[0030] Spacer 2, first insulating layer 9, and second insulating layer 12 are all made of cross-linked polyethylene material.

[0031] Cross-linked polyethylene has a stable chemical structure, excellent insulation properties, and low dielectric loss, which can significantly reduce power transmission losses. After cross-linking treatment, its mechanical strength is significantly improved, and it has strong resistance to environmental stress cracking, making it suitable for complex laying environments. The spacer 2 serves to isolate the conductor 3 and support the skeleton 1. The first insulating layer 9 and the second insulating layer 12 also serve to separate and insulate.

[0032] The wrapping layer 4 is made of non-woven fabric, the filling layer 5 is made of filling rope, the shielding layer 6 is made of metal braided mesh, and the armor layer 8 is made of steel strip. Two layers of non-wet wrapping tape can be wrapped between the metal shielding layer 6 and the metal armor layer 8 to prevent different metals from forming a galvanic cell and causing chemical corrosion.

[0033] The filler rope and conductor 3 are secured by wrapping layer 4. Shielding layer 6 effectively shields electromagnetic interference, preventing external electromagnetic waves from interfering with signals within the cable, and also preventing internal signals from radiating outwards, ensuring the stability and accuracy of signal transmission. Furthermore, the metal braided mesh provides mechanical protection, enhancing the cable's tensile and abrasion resistance, improving its durability, and extending its service life. Armor layer 8 primarily provides mechanical and safety protection, significantly enhancing the cable's resistance to compression, tension, and impact, effectively resisting external mechanical damage, and preventing internal structural damage caused by compression or puncture. Simultaneously, armor layer 8 offers some protection against rodent and ant bites, making it suitable for complex laying environments.

[0034] The woven layer 7 is made of aramid fiber material.

[0035] A braided layer 7 is added between the refractory ceramic layer 10 and the conductor 3. The aramid fiber braided layer 7 has high strength and high modulus characteristics, which can effectively improve the mechanical strength of the cable before ceramicization, and can maintain stable performance in high temperature environment without affecting the fire resistance performance of the refractory ceramic layer 10.

[0036] The refractory ceramic layer 10 is made of ceramicized silicone rubber, and the buffer layer 11 is made of aerogel felt.

[0037] After adding a flexible buffer layer 11 of aerogel felt outside the refractory ceramic layer 10, when the cable is subjected to external impact or thermal stress, the flexible buffer layer 11 can absorb some of the energy, reduce damage to the refractory ceramic layer 10, and prevent cracks in the ceramic structure caused by external forces, thereby ensuring stable fire resistance. The aerogel felt can be replaced with ceramic fiber felt or other buffer materials.

[0038] Working principle: During use, the central support frame 1 enhances the overall tensile strength of the cable and disperses stress when subjected to external shear forces, preventing the refractory ceramic layer 10 from cracking due to stress concentration. The braided layer 7 effectively improves the mechanical strength of the cable before ceramization and maintains stable performance at high temperatures, without affecting the fire resistance of the refractory ceramic layer 10. The flexible buffer layer 11 absorbs some energy, reducing damage to the refractory ceramic layer 10 and preventing cracks in the ceramized structure due to external forces, thus ensuring stable fire resistance.

[0039] 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 high-temperature resistant, fire-resistant, ceramicized silicone rubber cable, characterized in that: It includes several conductors (3) and a support frame (1). The support frame (1) is located inside the several conductors (3), and the surface of the support frame (1) is provided with a spacer (2). The several conductors (3) are wrapped together with a wrapping layer (4). A filling layer (5) is provided in the gap between the wrapping layer (4) and the several conductors (3). The surface of the wrapping layer (4) is covered with a shielding layer (6). The surface of the shielding layer (6) is covered with a braided layer (7). The surface of the braided layer (7) is covered with an armor layer (8). The surface of the armor layer (8) is covered with a first insulating layer (9). The surface of the first insulating layer (9) is covered with a refractory ceramic layer (10). The surface of the refractory ceramic layer (10) is covered with a buffer layer (11). The surface of the buffer layer (11) is covered with a second insulating layer (12).

2. The high-temperature resistant, fire-resistant, ceramicized silicone rubber cable according to claim 1, characterized in that: The supporting frame (1) is spiral-shaped.

3. The high-temperature resistant and fire-resistant ceramicized silicone rubber cable according to claim 1, characterized in that: The spacer (2), the first insulating layer (9), and the second insulating layer (12) are all made of cross-linked polyethylene material.

4. The high-temperature resistant and fire-resistant ceramicized silicone rubber cable according to claim 1, characterized in that: The wrapping layer (4) is made of non-woven fabric, the filling layer (5) is made of filling rope, the shielding layer (6) is made of metal woven mesh, and the armor layer (8) is made of steel strip.

5. The high-temperature resistant, fire-resistant, ceramicized silicone rubber cable according to claim 1, characterized in that: The braided layer (7) is made of aramid fiber material.

6. The high-temperature resistant and fire-resistant ceramicized silicone rubber cable according to claim 1, characterized in that: The refractory ceramic layer (10) is made of ceramicized silicone rubber, and the buffer layer (11) is made of aerogel felt.

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