Flexible fire-resistant 1000 DEG C special cable

Abstract

The utility model discloses a flexible fire-resistant 1000 DEG C special cable, which sequentially comprises a cable core, a filling layer, a reinforcing layer and an outer sheath from inside to outside, the cable core comprises a plurality of wire cores formed by twisting, the filling layer is extruded on the outer side of the cable core to form a round structure, and the reinforcing layer is extruded on the outer side of the outer sheath. The cable core comprises a conductor, an insulating tape layer wrapped outside the conductor and an insulating rubber layer extruded outside the insulating tape layer, the reinforcing layer comprises a nickel-plated copper wire braid layer and a high silica fiber cloth wrapping layer, the nickel-plated copper wire braid layer is woven outside the filling layer, the high silica fiber cloth wrapping layer is wrapped outside the nickel-plated copper wire braid layer, and the high silica fiber cloth wrapping layer is wrapped outside the high silica fiber cloth wrapping layer. And the outer sheath is extruded on the outer side of the high silica fiber cloth wrapping layer. The flexible fire-resistant 1000 DEG C special cable of the utility model has the advantages of high flexibility, strong fire resistance, anti-interference capability, and effectively improved comprehensive performance.

Description

Technical Field

[0001] This utility model relates to the field of special cable structures, specifically a flexible fire-resistant special cable with a temperature of 1000℃. Background Technology

[0002] Flexible fire-resistant cables are a special type of cable widely used in steel, rail transportation, coal mining, and building fire protection systems. They require overall flexibility, a small bending radius, and suitability for cable arrangements in confined spaces. They possess excellent fire resistance, maintaining circuit integrity and providing continuous power for over 3 hours under high-temperature flames, thus saving valuable time for personnel evacuation and fire rescue. Compared to traditional fire-resistant cables, flexible fire-resistant cables require greater flexibility, allowing them to be bent and coiled for easy installation and use in complex wiring environments. Currently, flexible fire-resistant cables have relatively poor fire resistance, and most produce halogenated fumes after combustion, posing a significant threat to human safety and environmental pollution. Overall, their comprehensive performance needs improvement. Utility Model Content

[0003] The purpose of this invention is to provide a flexible fire-resistant special cable for 1000℃, in order to solve the problems of poor fire resistance and low overall performance of existing high-temperature cables.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a flexible fire-resistant 1000℃ special cable, comprising, from the inside out, a cable core, a filling layer, a reinforcing layer, and an outer sheath. The cable core comprises several stranded wire cores. The filling layer is extruded around the outside of the cable core to form a round structure. The wire core comprises a conductor, an insulating tape layer wrapped around the conductor, and an insulating rubber layer extruded around the insulating tape layer. The reinforcing layer comprises a nickel-plated copper wire braided layer and a high-silica fiber cloth wrapping layer. The nickel-plated copper wire braided layer is woven around the outside of the filling layer. The high-silica fiber cloth wrapping layer is wrapped around the outside of the nickel-plated copper wire braided layer. The outer sheath is extruded around the outside of the high-silica fiber cloth wrapping layer.

[0005] As a further improvement to the above technical solution:

[0006] The conductor is a Class 5 soft copper conductor, made by first bundling single strands together and then regularly twisting all the strands together.

[0007] The inner layer pitch ratio of the regular stranding is 8-12, and the outer layer pitch ratio is 12-16.

[0008] The insulating tape layer is composed of a mica layer and ceramicized silicone rubber, and the insulating tape layer has at least two layers with a wrapping overlap rate of not less than 25%.

[0009] The average thickness of the filler layer is not less than 2.0 mm.

[0010] The outer sheath is made of TPU elastomer material through extrusion, with an extrusion thickness of not less than 2.0 mm.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] This utility model discloses a flexible fire-resistant 1000℃ special cable, which uses high-temperature resistant composite mineral insulation tape, nickel-plated copper wire braiding, and high-silica fiber cloth wrapping as the main fire-resistant structure. The cable is flexible overall with a small bending radius, making it suitable for cable laying in space-constrained situations. It has the following characteristics:

[0013] 1. Excellent fire resistance: the cable can maintain the integrity of the circuit and provide continuous power supply for more than 3 hours under a high-temperature flame of 1000℃.

[0014] 2. Excellent flexibility: Compared with traditional fire-resistant cables, flexible fire-resistant 1000℃ cables have better flexibility, can be bent and coiled, and are easy to install and use in complex wiring environments.

[0015] 3. Reliable insulation performance: The cable insulation layer is made of high-temperature resistant and high-insulation-performance materials, which can maintain stable insulation performance in high-temperature environments and prevent faults such as current leakage and short circuits.

[0016] 4. Low smoke and halogen-free characteristics: During combustion, the flexible fire-resistant 1000℃ special cable produces low smoke density and does not contain harmful substances such as halogens, thus posing less risk to human life and environmental pollution.

[0017] 5. Long service life. Thanks to the use of high-quality materials and advanced manufacturing processes, the flexible fire-resistant 1000℃ cable has a long service life and can operate stably for a long time in harsh environments, reducing cable replacement and maintenance costs.

[0018] 6. Excellent anti-interference performance: The nickel-plated copper wire braided shield has excellent anti-electromagnetic interference performance, which can maintain stable signal transmission in complex electromagnetic environments and ensure the normal operation of electrical equipment.

[0019] In summary, the flexible fire-resistant 1000℃ special cable of this utility model has high flexibility, strong fire resistance, and anti-interference ability, and its overall performance is effectively improved. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0022] Reference numerals: 11. Conductor; 12. Insulating tape layer; 13. Insulating rubber layer; 2. Filler layer; 3. Reinforcing layer; 31. Nickel-plated copper wire braided layer; 32. High-silica fiber cloth wrapping layer; 4. Outer sheath. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicating orientation or position, are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[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] like Figure 1 and Figure 2 As shown, the flexible fire-resistant 1000℃ special cable of this embodiment includes, from the inside out, a cable core, a filling layer 2, a reinforcing layer 3, and an outer sheath 4.

[0028] The cable core comprises several stranded cores, including a conductor 11, an insulating tape layer 12 wrapped around the conductor 11, and an insulating rubber layer 13 extruded over the insulating tape layer 12. The conductor 11 is a Category 5 soft copper conductor, using a method of first bundling single strands and then regularly twisting all strands together. The inner layer pitch ratio of the regularly twisted strands is 8-12, and the outer layer pitch ratio is 12-16. If the cable has more than four cores, a composite twisting method is used, with a pitch ratio of 6-10, to increase the cable's flexibility and bending resistance. The insulating tape layer 12 is composed of a mica layer and ceramicized silicone rubber, capable of withstanding long-term high-temperature environments of 1000℃ to ensure the cable's insulation performance. The insulating tape layer 12 consists of at least two layers, with a wrapping overlap rate of not less than 25%.

[0029] Filler layer 2 is extruded onto the outside of the cable core, forming a rounded structure. This embedded filler layer firmly secures the insulated core, preventing misalignment and deformation during frequent bending and torsion, which could lead to cable failure. The average thickness of filler layer 2 is no less than 2.0 mm. Filler layer 2 is extruded from low-smoke halogen-free polyolefin material.

[0030] The reinforcing layer 3 includes a nickel-plated copper wire braided layer 31 and a high-silica fiber cloth wrapping layer 32. The nickel-plated copper wire braided layer 31 is woven outside the filler layer 2, and the high-silica fiber cloth wrapping layer 32 is wrapped around the outside of the nickel-plated copper wire braided layer 31. The braiding density of the nickel-plated copper wire braided layer 31 is not less than 85%, and the overlap rate of the high-silica fiber cloth wrapping layer 32 is not less than 25%. It can withstand long-term high-temperature environments of 1000℃, ensuring the cable's shielding performance and internal insulation structure, enhancing the cable's mechanical properties, and guaranteeing the cable's strength.

[0031] The outer sheath 4 is extruded onto the outside of the high-silica fiber cloth wrapping layer 32. The outer sheath 4 is made of TPU elastomer material and the extrusion thickness is not less than 2.0 mm.

[0032] The above description is merely an embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A flexible fire-resistant special cable for 1000℃, comprising, from the inside out, a cable core, a filling layer (2), a reinforcing layer (3), and an outer sheath (4), characterized in that, The cable core includes several stranded wire cores. The filling layer (2) is extruded on the outside of the cable core to form a round structure. The wire core includes a conductor (11), an insulating tape layer (12) wrapped around the conductor (11), and an insulating rubber layer (13) extruded on the insulating tape layer (12). The reinforcing layer (3) includes a nickel-plated copper wire braided layer (31) and a high-silica fiber cloth wrapping layer (32). The nickel-plated copper wire braided layer (31) is braided on the outside of the filling layer (2). The high-silica fiber cloth wrapping layer (32) is wrapped on the outside of the nickel-plated copper wire braided layer (31). The outer sheath (4) is extruded on the outside of the high-silica fiber cloth wrapping layer (32).

2. The flexible fire-resistant 1000℃ special cable according to claim 1, characterized in that: The conductor (11) is a Class 5 soft copper conductor, which is made by first bundling single strands and then regularly twisting all the strands together.

3. The flexible fire-resistant 1000℃ special cable according to claim 2, characterized in that: The inner layer pitch ratio of the regular stranding is 8-12, and the outer layer pitch ratio is 12-16.

4. The flexible fire-resistant 1000℃ special cable according to claim 1, characterized in that: The insulating tape layer (12) is composed of a mica layer and ceramicized silicone rubber. The insulating tape layer (12) has at least two layers and the wrapping overlap rate is not less than 25%.

5. The flexible fire-resistant 1000℃ special cable according to claim 1, characterized in that: The average thickness of the filler layer (2) is not less than 2.0 mm.

6. The flexible fire-resistant 1000℃ special cable according to claim 1, characterized in that: The outer sheath (4) is made of TPU elastomer material extruded, and the extrusion thickness is not less than 2.0 mm.

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