Super flexible high current fire resistant cable

Abstract

The utility model relates to cable technical field, proposes a kind of super-flexible high current-carrying fireproof cable, comprising: four groups of conducting wire;Insulating layer is located at the outer surface of four groups of conducting wire;Fireproof structure is located at the outer surface of insulating layer;Elastomer filled between insulating layer and fireproof structure;Protective layer is located at the outer surface of fireproof structure;Wavy bending energy-absorbing layer is located at the outer surface of protective layer;And wear-resistant band is spirally wound to the outer surface of wavy bending energy-absorbing layer. By setting wear-resistant band for and external environment direct contact, cable can be pre-abrasion protection when cable moves, when cable bending, wavy bending energy-absorbing layer can effectively absorb and disperse the bending stress of cable, while wear-resistant band can slide and adjust with the deformation of cable appropriately, so that through wavy bending energy-absorbing layer and wear-resistant band cooperation, the effect that cable is simultaneously provided with flexibility and wear resistance is realized, effectively improve the bending effect and service life of cable.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to an ultra-flexible, high-current-carrying fireproof cable. Background Technology

[0002] A cable is a device for transmitting electrical energy or signals, typically composed of several or groups of conductors. Types of cables include power cables, control cables, compensating cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, and so on. They all consist of single or multiple strands of conductors and insulation layers, used to connect circuits, electrical appliances, etc.

[0003] A known authorized patent with publication number CN215298895U discloses an ultra-flexible high-current-carrying fireproof cable. Its background technology addresses the problem that "traditional fireproof cables have low fire resistance, insufficient strength, and poor compressive and tensile strength during use." To address this, the technical solution includes "four sets of conductors, each set of conductors having an insulation layer on its outer wall; an elastomer filling the space between the steel-plastic composite reinforcing strip layer and the insulation layer; a fireproof layer covering the outer wall of the steel-plastic composite reinforcing strip layer; a flame-retardant layer covering the outer wall of the fireproof layer; a support rod connecting the flame-retardant layer and the fireproof layer; and a gap between the fireproof layer and the flame-retardant layer, filled with inert gas."

[0004] However, the following problems were found in the implementation of the relevant technologies: Although the strength of the cable was improved by setting up an insulation layer, a steel-plastic composite reinforcing strip layer, a support rod, a flame-retardant layer, a low-smoke halogen-free rodent-proof and ultraviolet-proof sheath layer and a fireproof layer, this undoubtedly increased the difficulty of bending the cable, making it difficult for the cable to have both flexibility and wear resistance at the same time, thus reducing the bending effect and service life of the cable. Utility Model Content

[0005] This invention proposes an ultra-flexible, high-current-carrying fireproof cable, which solves the problem in related technologies that cables cannot simultaneously possess both flexibility and abrasion resistance.

[0006] The technical solution of this utility model is as follows: an ultra-flexible high current-carrying fireproof cable, comprising: four sets of conductors;

[0007] An insulating layer is installed on the outer surface of the four sets of conductors;

[0008] A fireproof structure located on the outer surface of the insulation layer;

[0009] An elastomer used to fill the space between the insulation layer and the fireproof structure;

[0010] A protective layer installed on the outer surface of a fire-resistant structure;

[0011] A wavy, curved energy-absorbing layer is provided on the outer surface of the protective layer;

[0012] And a wear-resistant strip spirally wound around the outer surface of the wavy, curved energy-absorbing layer.

[0013] Preferably, the insulating layer includes an inner insulating layer disposed on the outer surface of the conductor, a sliding layer disposed on the outer surface of the inner insulating layer, and an outer insulating layer disposed on the outer surface of the sliding layer.

[0014] Preferably, the fireproof structure includes a fireproof layer disposed on the outside of the insulation layer, and a flame-retardant layer disposed on the outer surface of the fireproof layer, wherein the protective layer is disposed on the outer surface of the flame-retardant layer.

[0015] Preferably, the protective layer is made of polyether-type TPU nanocomposite material.

[0016] Preferably, the wavy, curved energy-absorbing layer is made of silicone rubber.

[0017] Preferably, the wear-resistant belt is made of ultra-high molecular weight polyethylene material, and the wear-resistant belt has a winding spacing.

[0018] Preferably, the inner insulation layer is made of ceramic fiber woven mesh material, the slip layer is made of a coating with a low coefficient of friction, and the outer insulation layer is made of tin-plated copper woven mesh material.

[0019] The working principle and beneficial effects of this utility model are as follows:

[0020] By incorporating abrasion-resistant tape for direct contact with the external environment, the cable undergoes pre-wear protection during movement, ensuring its abrasion resistance. When the cable bends, the corrugated bending energy-absorbing layer effectively absorbs and disperses the bending stress, preventing localized stress concentration and maintaining good flexibility. Simultaneously, the abrasion-resistant tape can slide and adjust appropriately with the cable's deformation, preventing damage or failure due to excessive bending and stretching. Thus, the combination of the corrugated bending energy-absorbing layer and the abrasion-resistant tape achieves both flexibility and abrasion resistance in the cable, avoiding situations where flexibility results in poor abrasion resistance, effectively improving the cable's bending performance and service life. Attached Figure Description

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0023] Figure 2 This is a cross-sectional planar structural diagram of the conductor of this utility model;

[0024] Figure 3This utility model Figure 2 Enlarged structural diagram at point A;

[0025] Figure 4 This is a schematic diagram of the planar structure of the insulating layer of this utility model;

[0026] In the diagram: 1. Conductor; 2. Insulation layer; 201. Inner insulation layer; 202. Slip layer; 203. Outer insulation layer; 3. Elastomer; 4. Protective layer; 5. Corrugated bending energy-absorbing layer; 6. Wear-resistant tape; 7. Fireproof layer; 8. Flame-retardant layer. Detailed Implementation

[0027] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0028] Example 1

[0029] Please see Figure 1 - Figure 4 The present invention provides an ultra-flexible high current-carrying fireproof cable, comprising: four sets of conductors 1;

[0030] Insulation layer 2 is provided on the outer surface of the four sets of conductors 1;

[0031] A fireproof structure is provided on the outer surface of the insulation layer 2;

[0032] An elastomer 3 is filled between the insulation layer 2 and the fireproof structure, wherein the elastomer 3 is made of polyolefin material, composed of hydrocarbons, and can decompose into carbon dioxide and water when burned;

[0033] The protective layer 4 is provided on the outer surface of the fireproof structure. The protective layer 4 is made of polyether-type TPU nanocomposite material, which has excellent flexibility, elasticity and wear resistance.

[0034] The wavy curved energy-absorbing layer 5 is disposed on the outer surface of the protective layer 4. The wavy curved energy-absorbing layer 5 is made of any one of the following materials: TPU, TPEE, silicone rubber (liquid silicone LSR), high-performance nitrile rubber (HNBR) or hydrogenated nitrile rubber (HNBR), and its waveform is designed as a sine wave.

[0035] And a wear-resistant belt 6 spirally wound around the outer surface of the wavy, curved energy-absorbing layer 5. The wear-resistant belt 6 is made of ultra-high molecular weight polyethylene material, and the wear-resistant belt 6 has a winding gap, which can be controlled between 1 and 2 mm to leave a flexible gap.

[0036] The technical solution provided in this embodiment is as follows: During use, the insulation layer 2 provides insulation protection for the conductor 1, and the elastomer 3 prevents the conductor 1 from overheating and spontaneously combusting, thus providing mechanical protection. Simultaneously, the fire-resistant structure enhances the cable's fire resistance and reduces the impact of high-temperature combustion on the cable's internal structure. The wear-resistant strip 6 serves as the cable's first line of defense, allowing direct contact with the external environment. During cable movement, its high wear resistance replaces the protective layer 4 for friction, providing pre-wear protection and ensuring the cable's abrasion resistance. This effectively protects the cable's outer surface. The wear-resistant strip 6 can be disassembled and replaced when severely worn. The protective layer 4 further enhances the cable's abrasion resistance. When the cable is bent, the corrugated bending energy-absorbing layer 5 effectively absorbs and disperses the bending stress of the cable, making it less prone to local stress concentration during bending. This reduces the impact on the cable's internal structure and maintains good flexibility. Furthermore, since the wear-resistant band 6 is spirally wound with gaps, it can slide and adjust appropriately with the cable's deformation when the cable is bent, preventing damage or failure due to excessive bending and stretching. This helps maintain its functional integrity. Thus, through the combination of the corrugated bending energy-absorbing layer 5 and the wear-resistant band 6, the cable achieves both flexibility and wear resistance, avoiding the situation where the cable's combined flexibility (or wear resistance) results in poor wear resistance (or flexibility). This effectively improves the cable's bending performance and service life.

[0037] Furthermore, the insulation layer 2 includes an inner insulation layer 201 disposed on the outer surface of the conductor 1, a sliding layer 202 disposed on the outer surface of the inner insulation layer 201, and an outer insulation layer 203 disposed on the outer surface of the sliding layer 202. The inner insulation layer 201 is made of any one of ceramic fiber braided mesh or glass fiber braided mesh. The sliding layer 202 is made of a coating with a low coefficient of friction, such as molybdenum disulfide coating, tungsten carbide coating, aluminum titanium nitride coating, etc. In addition, the sliding layer 202 also has good heat resistance and can maintain its own properties under the operating temperature of conventional cables. The outer insulation layer 203 is made of any one of tin-plated copper braided mesh, copper braided mesh, conductive silicone rubber, conductive polyurethane, conductive EPDM rubber, conductive neoprene rubber, or conductive thermoplastic elastomer, and has good ductility to improve the flexibility and bending ability of the cable core.

[0038] Specifically, by contacting and maintaining relative stability with the conductor 1 through the inner insulation layer 201, the conductor 1 can be provided with mechanical and insulation protection. When the cable is bent, the extension properties of the outer insulation layer 203 allow the extended portion of the outer insulation layer 203 to slide relative to the inner insulation layer 201 through the sliding layer 202, which can reduce the disturbance to the conductor 1 and reduce the impact of bending on the conductor 1. Thus, the cable can maintain high flexibility while also improving the service life of the conductor 1.

[0039] Furthermore, the fireproof structure includes a fireproof layer 7 disposed on the outside of the insulation layer 2, and a flame-retardant layer 8 disposed on the outer surface of the fireproof layer 7. A protective layer 4 is disposed on the outer surface of the flame-retardant layer 8. The flame-retardant layer 8 is made of polyolefin material and is composed of hydrocarbons. When burning, it decomposes into carbon dioxide and water, thus having a flame-retardant effect.

[0040] Specifically, by setting fireproof layer 7 and flame-retardant layer 8, the fire resistance of the cable can be improved, ensuring the safety of the cable in use.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A super flexible high current fire resistant cable characterized in that, include: Four sets of wires (1); Insulation layer (2) is provided on the outer surface of the four sets of conductors (1); A fireproof structure is provided on the outer surface of the insulation layer (2); An elastomer (3) is filled between the insulation layer (2) and the fireproof structure; A protective layer (4) is provided on the outer surface of the fireproof structure. A wavy, curved energy-absorbing layer (5) is provided on the outer surface of the protective layer (4); And a wear-resistant strip (6) spirally wound around the outer surface of the wavy, curved energy-absorbing layer (5).

2. A super flexible high current fire resistant cable as claimed in claim 1, wherein, The insulation layer (2) includes an inner insulation layer (201) disposed on the outer surface of the conductor (1), a sliding layer (202) disposed on the outer surface of the inner insulation layer (201), and an outer insulation layer (203) disposed on the outer surface of the sliding layer (202).

3. The super flexible high current fire resistant cable of claim 1, wherein, The fireproof structure includes a fireproof layer (7) disposed on the outside of the insulation layer (2) and a flame-retardant layer (8) disposed on the outer surface of the fireproof layer (7), and the protective layer (4) is disposed on the outer surface of the flame-retardant layer (8).

4. The super flexible high current fire resistant cable of claim 1, wherein, The protective layer (4) is made of polyether-type TPU nanocomposite material.

5. The super flexible high current fire resistant cable of claim 1, wherein, The wavy, curved energy-absorbing layer (5) is made of silicone rubber.

6. The super flexible high current fire resistant cable of claim 1, wherein, The wear-resistant belt (6) is made of ultra-high molecular weight polyethylene material, and the wear-resistant belt (6) has a winding spacing.

7. The super flexible high current fire resistant cable of claim 2, wherein, The inner insulation layer (201) is made of ceramic fiber woven mesh material, the slip layer (202) is made of a coating with a low coefficient of friction, and the outer insulation layer (203) is made of tin-plated copper woven mesh material.

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