Tensile high-flame-retardant cable

Abstract

The utility model discloses a tensile high flame-retardant cable, comprising a cable core, the cable core comprises a wire core and a filling layer, the outside of the cable core is provided with a wrapping layer, the outside of the wrapping layer is provided with an insulating lining layer, the outside of the insulating lining layer is provided with a composite flame-retardant layer, the outside of the composite flame-retardant layer is provided with a compression-resistant layer, and the outside of the compression-resistant layer is provided with a sheath. The cable comprises an insulating lining layer, a composite flame-retardant layer is arranged outside the insulating lining layer, a compression-resistant layer is arranged outside the composite flame-retardant layer, an armor layer is arranged outside the compression-resistant layer, the composite flame-retardant layer, the compression-resistant layer and the armor layer are sequentially attached outside the insulating lining layer, an outer sheath is arranged outside the armor layer, the outer sheath and the armor layer are formed through extrusion, the flame-retardant layer of the cable adopts a composite structure, the flame-retardant performance of the cable is improved, and the cable has a good flame-retardant effect. The compression-resistant layer is arranged in the cable, impact energy is effectively absorbed when the cable is subjected to external force, the flame-retardant layer is protected, the armor layer and the tensile wires arranged in the cable enable the cable to be flexible and have better tensile performance, and the use effect of the cable is improved.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a high tensile strength and flame retardant cable. Background Technology

[0002] A cable is a conductor made of one or more mutually insulated conductors and an outer insulating protective layer. It is laid underground, in the air, etc. A cable generally consists of three parts: conductor, insulation layer, and protective layer. Flame-retardant cable refers to a cable that, under specified test conditions, is burned and, after the test fire source is removed, the spread of the flame is limited to a limited area, and the residual flame or embers can extinguish themselves within a limited time. In the event of a fire, it may be burned and unable to operate, but it can prevent the spread of fire. Tensile cables are widely used for power transmission in equipment such as reeling machines, conveyors, lifting electromagnets, electric flatbed trucks, various cranes, and large material handling machines.

[0003] Chinese Patent Publication No. CN114822961B, authorized on August 18, 2023, discloses a high-tensile-strength flame-retardant cable, comprising an outer sheath, a steel wire armor layer, a cross-linked polyethylene insulation layer, a flame-retardant sheath layer, a tensile-strength core, and a cable core; the tensile-strength core is a bundle of impregnated aramid fibers; the cable core and the impregnated aramid fiber bundle are fixed by wrapping with mica tape. This invention's high-tensile-strength flame-retardant cable has excellent tensile-strength and flame-retardant properties, and can meet the usage requirements of general scenarios.

[0004] Existing cables incorporate galvanized steel wire tensile cores to meet tensile requirements. While these cores do meet the tensile requirements, they also reduce the cable's flexibility. Forcibly bending the cable can damage the flame-retardant layer, reducing its flame-retardant effect and failing to meet usage requirements. Utility Model Content

[0005] The purpose of this utility model is to provide a high tensile strength and flame retardant cable to solve the problem mentioned in the background art that existing cables add galvanized steel wire tensile cores inside to meet tensile requirements. Although the galvanized steel wire tensile cores can meet the tensile requirements, they also reduce the flexibility of the cable. Forcibly bending the cable can easily damage the flame retardant layer, reduce the flame retardant effect of the cable, and fail to meet the usage requirements.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-tensile strength flame-retardant cable, comprising a cable core, the cable core including a conductor and a filling layer, a wrapping layer disposed on the outside of the cable core, an insulating inner lining layer disposed on the outside of the wrapping layer, and the insulating inner lining layer and the wrapping layer being extruded together, a composite flame-retardant layer disposed on the outside of the insulating inner lining layer, a pressure-resistant layer disposed on the outside of the composite flame-retardant layer, an armor layer disposed on the outside of the pressure-resistant layer, and the composite flame-retardant layer, the pressure-resistant layer and the armor layer being sequentially bonded together on the outside of the insulating inner lining layer, and an outer sheath disposed on the outside of the armor layer, and the outer sheath and the armor layer being extruded together.

[0007] Preferably, the wire core includes a conductor, an insulation layer, a shielding layer, and a graphene coating. The conductor is formed by stranding multiple finely twisted copper wires. The insulation layer is disposed outside the conductor, and the shielding layer is disposed outside the insulation layer. The insulation layer and the shielding layer are sequentially extruded outside the conductor. The outer wall of the shielding layer is provided with a graphene coating, and the graphene coating is integrally coated with the shielding layer.

[0008] Preferably, the composite flame-retardant layer includes a flame-retardant inner layer, a flame-retardant outer layer, and a heat-insulating layer. The flame-retardant outer layer is disposed outside the flame-retardant inner layer, and the heat-insulating layer is disposed between the flame-retardant inner layer and the flame-retardant outer layer. The flame-retardant inner layer, the flame-retardant outer layer, and the heat-insulating layer are pressed together as a single unit.

[0009] Preferably, the armor layer includes a base layer and a reinforcing layer, wherein the reinforcing layer is disposed outside the base layer and is woven and wound around the base layer.

[0010] Preferably, the outer sheath includes an outer sheath layer, tensile filaments, and an anti-aging coating. The tensile filaments are disposed inside the outer sheath layer, and there are at least six tensile filaments. The tensile filaments are equidistantly disposed inside the outer sheath layer. The anti-aging coating is disposed on the outer wall of the outer sheath layer and is integrally coated with the outer sheath layer.

[0011] Preferably, there are five wire cores, and the five wire cores are equidistantly arranged inside the cable core, and the filling layer is disposed in the gap between the five cable cores.

[0012] Preferably, the wrapping layer is spirally wound around the outside of the cable core.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model device incorporates a composite flame-retardant layer, a pressure-resistant layer, and tensile-resistant wires. The conductor uses finely stranded copper wire bundled together to enhance the overall strength and flexibility of the core. The composite flame-retardant layer consists of a flame-retardant inner layer, a flame-retardant outer layer, and a heat-insulating layer. The flame-retardant inner layer uses ceramicized fire-retardant silicone rubber, which has excellent flame-retardant properties and can quickly form a heat-insulating barrier to prevent the spread of flames in the event of a fire. The flame-retardant outer layer uses halogen-free, low-smoke flame-retardant polyolefin, which has excellent properties such as low smoke, low toxicity, flame retardancy, and low corrosivity. The heat-insulating layer uses inorganic flame-retardant materials, which have good heat-insulating properties and can mitigate the impact of fire on the cable's interior, thus increasing the cable's flame-retardant performance. The pressure-resistant layer uses nylon fiber, which has good buffering performance and energy absorption characteristics, and can absorb impact energy during torsion, protecting the internal structure of the cable. The tensile-resistant wires use carbon fiber braided tape, which has excellent mechanical properties and fatigue resistance, and can withstand large torque and bending stress, enhancing its tensile strength and improving the cable's performance.

[0015] This utility model device features an armor layer composed of a base layer and a reinforcing layer. The base layer is made of cold-rolled steel strip, which has good mechanical strength and corrosion resistance, and can effectively resist external pressure and tension. The reinforcing layer is made of glass fiber, which has the advantages of being lightweight, high-strength, and corrosion-resistant, and can further improve the mechanical strength of the armor layer and withstand greater tensile force. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the wire core of this utility model;

[0018] Figure 3 This is a structural diagram of the composite flame-retardant layer of this utility model;

[0019] Figure 4 This is a structural diagram of the armor layer of this utility model;

[0020] Figure 5 This is a structural diagram of the outer sheath of this utility model.

[0021] In the diagram: 1. Cable core; 2. Wire core; 3. Filler layer; 4. Wrapping layer; 5. Insulating inner lining layer; 6. Composite flame-retardant layer; 7. Compression-resistant layer; 8. Armor layer; 9. Outer sheath; 10. Tensile-resistant wire; 11. Conductor; 12. Insulation layer; 13. Shielding layer; 14. Graphene coating; 15. Flame-retardant inner layer; 16. Flame-retardant outer layer; 17. Heat insulation layer; 18. Base layer; 19. Reinforcing layer; 20. Outer sheath layer; 21. Anti-aging coating. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-5 This utility model provides an embodiment of a high-tensile strength flame-retardant cable, comprising a cable core 1, which includes a conductor core 2 and a filling layer 3. A wrapping layer 4 is disposed outside the cable core 1, and an insulating inner liner layer 5 is disposed outside the wrapping layer 4. The insulating inner liner layer 5 and the wrapping layer 4 are formed by extrusion. A composite flame-retardant layer 6 is disposed outside the insulating inner liner layer 5, a compression-resistant layer 7 is disposed outside the composite flame-retardant layer 6, and an armor layer 8 is disposed outside the compression-resistant layer 7. The composite flame-retardant layer 6, the compression-resistant layer 7, and the armor layer 8 are sequentially bonded to the outside of the insulating inner liner layer 5. An outer sheath 9 is disposed outside the armor layer 8, and the outer sheath 9 and the armor layer 8 are formed by extrusion. The core 2 is formed by forming a conductor 11, an insulation layer 12, a shielding layer 13, and a graphene coating 14. The conductor 11 is formed by twisting multiple finely stranded copper wires. The insulation layer 12 is disposed on the outside of the conductor 11, and the shielding layer 13 is disposed on the outside of the insulation layer 12. The insulation layer 12 and the shielding layer 13 are sequentially formed by extrusion on the outside of the conductor 11. The outer wall of the shielding layer 13 is provided with a graphene coating 14, and the graphene coating 14 is coated integrally with the shielding layer 13. There are five cores 2, and the five cores 2 are equidistantly arranged inside the core 1. The filling layer 3 is disposed in the gap between the five cores 1, and the wrapping layer 4 is spirally wound on the outside of the core 1.

[0024] Please see Figure 1 and Figure 3 The composite flame-retardant layer 6 includes a flame-retardant inner layer 15, a flame-retardant outer layer 16, and a heat insulation layer 17. The flame-retardant outer layer 16 is disposed outside the flame-retardant inner layer 15, and the heat insulation layer 17 is disposed between the flame-retardant inner layer 15 and the flame-retardant outer layer 16. The flame-retardant inner layer 15, the flame-retardant outer layer 16, and the heat insulation layer 17 are pressed together as one piece. The flame-retardant inner layer 15 is made of ceramicized fire-retardant silicone rubber, which has excellent flame-retardant properties and can quickly form a heat insulation barrier to prevent the spread of flames in the event of a fire. The flame-retardant outer layer 16 is made of halogen-free low-smoke flame-retardant polyolefin, which has excellent properties such as low smoke, low toxicity, flame retardancy, and low corrosivity. The heat insulation layer 17 is made of inorganic flame-retardant material, which has good heat insulation properties and can reduce the impact of fire on the inside of the cable. The combination of the flame-retardant inner layer 15, the flame-retardant outer layer 16, and the heat insulation layer 17 increases the flame-retardant performance of the cable.

[0025] Please see Figure 1 and Figure 4The armor layer 8 includes a base layer 18 and a reinforcing layer 19. The reinforcing layer 19 is disposed outside the base layer 18 and is woven and wound around the base layer 18. The base layer 18 is made of cold-rolled steel strip, which has good mechanical strength and corrosion resistance and can effectively resist external pressure and tension. The reinforcing layer 19 is made of glass fiber, which has the advantages of light weight, high strength and good corrosion resistance, and can further improve the mechanical strength of the armor layer 8.

[0026] Please see Figure 1 and Figure 5 The outer sheath 9 includes an outer sheath layer 20, tensile filaments 10, and an anti-aging coating 21. The tensile filaments 10 are disposed inside the outer sheath layer 20, and there are at least six tensile filaments 10, which are equidistantly arranged inside the outer sheath layer 20. The anti-aging coating 21 is disposed on the outer wall of the outer sheath layer 20, and the anti-aging coating 21 is coated integrally with the outer sheath layer 20. The outer sheath layer 20 is made of polyester fiber, which has excellent mechanical properties and fatigue resistance, and can enhance the strength and wear resistance of the outer sheath. The tensile filaments 10 are made of carbon fiber braided tape, which has excellent mechanical properties and fatigue resistance, and can withstand large torque and bending stress, thus enhancing its tensile strength. The anti-aging coating 21 is made of polyolefin, which can resist the corrosion of ultraviolet rays and oxidation, and extend the service life of the cable.

[0027] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-tensile strength flame-retardant cable, comprising a cable core (1), characterized in that: The cable core (1) includes a wire core (2) and a filling layer (3). The cable core (1) is provided with a wrapping layer (4) on the outside. The wrapping layer (4) is provided with an insulating inner lining layer (5) on the outside. The insulating inner lining layer (5) and the wrapping layer (4) are formed by extrusion. The insulating inner lining layer (5) is provided with a composite flame retardant layer (6) on the outside. The composite flame retardant layer (6) is provided with a pressure-resistant layer (7) on the outside. The pressure-resistant layer (7) is provided with an armor layer (8) on the outside. The composite flame retardant layer (6), the pressure-resistant layer (7) and the armor layer (8) are sequentially bonded to the outside of the insulating inner lining layer (5). The armor layer (8) is provided with an outer sheath (9) on the outside. The outer sheath (9) and the armor layer (8) are formed by extrusion.

2. The high tensile strength and flame retardant cable according to claim 1, characterized in that: The core (2) includes a conductor (11), an insulation layer (12), a shielding layer (13), and a graphene coating (14). The conductor (11) is made of multiple finely stranded copper wires. The insulation layer (12) is disposed outside the conductor (11), and the shielding layer (13) is disposed outside the insulation layer (12). The insulation layer (12) and the shielding layer (13) are extruded sequentially outside the conductor (11). The outer wall of the shielding layer (13) is provided with a graphene coating (14), and the graphene coating (14) and the shielding layer (13) are coated as a single unit.

3. The high tensile strength and flame retardant cable according to claim 1, characterized in that: The composite flame-retardant layer (6) includes a flame-retardant inner layer (15), a flame-retardant outer layer (16), and a heat insulation layer (17). The flame-retardant outer layer (16) is disposed outside the flame-retardant inner layer (15), and the heat insulation layer (17) is disposed between the flame-retardant inner layer (15) and the flame-retardant outer layer (16). The flame-retardant inner layer (15), the flame-retardant outer layer (16), and the heat insulation layer (17) are pressed together as one unit.

4. The high tensile strength and flame retardant cable according to claim 1, characterized in that: The armor layer (8) includes a base layer (18) and a reinforcing layer (19). The reinforcing layer (19) is disposed outside the base layer (18) and is woven and wrapped around the base layer (18).

5. A high-tensile strength flame-retardant cable according to claim 1, characterized in that: The outer sheath (9) includes an outer sheath (20), tensile filaments (10), and an anti-aging coating (21). The tensile filaments (10) are disposed inside the outer sheath (20), and there are at least six tensile filaments (10). The tensile filaments (10) are equidistantly disposed inside the outer sheath (20). The anti-aging coating (21) is disposed on the outer wall of the outer sheath (20), and the anti-aging coating (21) is coated integrally with the outer sheath (20).

6. The high tensile strength and flame retardant cable according to claim 1, characterized in that: The cable core (2) is provided in five parts, and the five cable cores (2) are equidistantly arranged inside the cable core (1). The filling layer (3) is provided at the gap between the five cable cores (1).

7. The high tensile strength and flame retardant cable according to claim 1, characterized in that: The wrapping layer (4) is spirally wound around the outside of the cable core (1).

Images