Graphene composite copper conductor anti-interference flame-retardant low-voltage power cable

Abstract

The utility model belongs to cable field especially, it is a kind of graphene composite copper conductor anti-interference flame-retardant low-voltage power cable, to the lack of effective temperature monitoring means of current cable, cannot grasp the temperature change in the process of cable operation in real time, anti-interference ability is limited, the weight of traditional cable is larger, the problem of installation and handling difficulty, present and propose following scheme, including graphene composite copper conductor, its inside interval inserts graphene oxide fibre sensor;Crosslinking polyethylene insulating layer covered in the graphene composite copper conductor outside;Polyimide aluminium foil composite tape shielding layer covered in the outside of multiple conductors, in the utility model, thermal response hydrogel microcapsule breaks when contacting high-temperature fire source, releases ammonium polyphosphate flame retardant, and zinc oxide reacts to generate expansion carbon layer, effectively prevents fire spread, realizes flame-retardant self-repair function, graphene oxide fibre sensor interval inserts graphene composite copper conductor inside, can monitor cable temperature change in real time.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a graphene composite copper conductor anti-interference and flame-retardant low-voltage power cable. Background Technology

[0002] In the field of low-voltage power transmission, cables serve as crucial carriers of electrical energy and signals, and their performance directly impacts the safe and stable operation of power systems. With continuous technological advancements, the performance requirements for cables are constantly increasing.

[0003] Traditional low-voltage power cables have certain deficiencies in flame-retardant properties. When exposed to high temperatures during a fire, they are prone to combustion and rapid spread, which can not only cause power outages but also potentially lead to larger safety accidents, posing a serious threat to life and property. Furthermore, traditional cables lack effective temperature monitoring methods, making it impossible to monitor temperature changes in real time during cable operation and to detect abnormal heating caused by overloads or short circuits in advance, thus increasing the risk of fire.

[0004] In terms of anti-interference, with the widespread use of electronic devices, the surrounding electromagnetic environment is becoming increasingly complex. Traditional cables have limited anti-interference capabilities and are easily affected by external electromagnetic interference, leading to unstable and distorted signal transmission, which affects the normal operation of the power system and communication quality.

[0005] Furthermore, traditional cables often focus on basic conductivity and insulation functions in their structural design, neglecting the weight and bending resistance of the cables. In applications with strict requirements on cable weight and installation space, such as aerospace and high-rise buildings, traditional cables are heavy, making installation and handling difficult, and their poor bending stiffness makes them prone to damage during bending, affecting their service life and reliability.

[0006] Therefore, developing a low-voltage power cable with excellent flame retardant properties, real-time temperature monitoring function, good anti-interference performance, and lightweight and high bending stiffness characteristics is of great practical significance. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies, such as the lack of effective temperature monitoring methods for traditional cables, the inability to monitor temperature changes during cable operation in real time, limited anti-interference capabilities of traditional cables, susceptibility to external electromagnetic interference leading to unstable and distorted signal transmission, heavy weight making installation and handling difficult, poor bending stiffness making them prone to damage during bending, and reduced cable lifespan and reliability. Therefore, this invention proposes a graphene composite copper conductor anti-interference and flame-retardant low-voltage power cable.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A graphene composite copper conductor anti-interference and flame-retardant low-voltage power cable includes a graphene composite copper conductor with graphene oxide fiber sensors embedded in it at intervals.

[0010] A cross-linked polyethylene insulating layer covering the outside of the graphene composite copper conductor;

[0011] A polyimide aluminum foil composite tape shielding layer covering the outside of multiple conductors;

[0012] A flame-retardant layer is disposed on the outer surface of the shielding layer of the polyimide aluminum foil composite tape. The flame-retardant layer includes a graphene film doped with magnetic particles and thermally responsive hydrogel microcapsules covering it.

[0013] An inner sheath covering the outside of the flame-retardant layer;

[0014] Argon arc welding is applied to the armor layer on the outer wall of the inner sheath, and its outer surface is coated with zinc oxide and forms multiple honeycomb holes, which are filled with CF / PEEK filler.

[0015] An outer sheath covering the outer side of the armor layer;

[0016] When the cable comes into contact with a high-temperature fire source, the thermally responsive hydrogel microcapsules rupture and release flame retardant, which reacts with the zinc oxide coating to form an expanded carbon layer.

[0017] In one possible design, the graphene film of the flame-retardant layer is deposited on the outer surface of the polyimide aluminum foil composite tape shielding layer, and the magnetic particles are ferrite particles.

[0018] In one possible design, the thermally responsive hydrogel microcapsules encapsulate ammonium polyphosphate flame retardant with a rupture temperature of 180℃±10℃.

[0019] In one possible design, the honeycomb cells are distributed in a hexagonal array with a diameter of 2 mm ± 0.2 mm and a spacing of 1 mm ± 0.1 mm.

[0020] In one possible design, the graphene oxide fiber sensor is embedded at intervals along the conductor axis, with a spacing of 5cm ± 1cm.

[0021] In one possible design, the graphene composite copper conductor is made of seven graphene composite copper wires twisted together.

[0022] In one possible design, the flame-retardant filler rope between the multiple conductors is a glass fiber rope with zinc oxide attached to its surface.

[0023] In this application, when the cable comes into contact with a high-temperature fire source, the thermally responsive hydrogel microcapsules rupture, thereby releasing ammonium polyphosphate flame retardant, which reacts with zinc oxide to generate an expanded carbon layer, achieving flame retardant self-healing. The graphene oxide fiber sensor can monitor temperature changes in real time. The outer wall of the armor layer is laser-etched with honeycomb holes, and the inside of the honeycomb holes is filled with carbon fiber reinforced polyetheretherketone, which reduces weight by utilizing the holes and improves bending stiffness.

[0024] Beneficial effects

[0025] The thermally responsive hydrogel microcapsules rupture upon contact with a high-temperature fire source, releasing ammonium polyphosphate flame retardant. This reacts with zinc oxide to form an expanded char layer, effectively preventing the spread of fire and achieving a flame-retardant self-healing function. Simultaneously, a graphene film doped with magnetic particles is applied as a flame-retardant layer to the outer surface of the polyimide aluminum foil composite tape shielding layer and armor layer, further enhancing the cable's flame-retardant capability and ensuring its safe operation under fire hazards.

[0026] Graphene oxide fiber sensors are interspersed within graphene composite copper conductors, enabling real-time monitoring of cable temperature changes. This helps to promptly detect abnormal heating in the cable, provide early warnings of potential safety hazards, prevent fires caused by excessive temperatures, and improve the safety and reliability of cable operation.

[0027] Multiple graphene composite copper conductors are wrapped with the same polyimide aluminum foil composite shielding layer, which can effectively shield external electromagnetic interference, ensure the stability and accuracy of the cable transmission signal, and is suitable for low-voltage power transmission scenarios with high requirements for electromagnetic environment.

[0028] The outer wall of the armor layer is laser-etched with honeycomb holes and filled with carbon fiber reinforced polyetheretherketone (CF / PEEK filler). The hole design reduces the overall weight of the cable, while the carbon fiber reinforced polyetheretherketone material improves the bending stiffness of the cable, making the cable easier to handle during installation and use, and able to withstand a certain bending stress, thus extending the cable's service life.

[0029] The graphene composite copper conductor is composed of multiple stranded power cores, each consisting of a graphene composite copper conductor and an extruded cross-linked polyethylene insulation layer. This multi-layered structure design ensures the conductor's conductivity and insulation performance. Flame-retardant layers are placed between the layers, and an argon-arc welding armor layer process is used to stabilize the overall cable structure and ensure synergistic function of each component, thus improving the cable's overall performance. Attached Figure Description

[0030] Figure 1 A three-dimensional structural schematic diagram of a graphene composite copper conductor anti-interference and flame-retardant low-voltage power cable proposed in this utility model.

[0031] Figure 2 This is a three-dimensional cross-sectional view of a graphene composite copper conductor anti-interference and flame-retardant low-voltage power cable proposed in this utility model.

[0032] Figure 3 This is a three-dimensional structural diagram of the armor layer in a graphene composite copper conductor anti-interference and flame-retardant low-voltage power cable proposed in this utility model.

[0033] In the figure: 1. Graphene composite copper conductor; 2. Graphene oxide fiber sensor; 3. Outer sheath; 4. Inner sheath; 5. Polyimide aluminum foil composite tape shielding layer; 6. Cross-linked polyethylene insulation layer; 7. Graphene film; 8. Thermally responsive hydrogel microcapsule; 9. Armor layer; 10. CF / PEEK filler; 11. Honeycomb pores. Detailed Implementation

[0034] 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.

[0035] In one embodiment: Refer to Figure 1-3 The specific implementation method of this cable is as follows:

[0036] In the field of low-voltage power transmission, in order to meet the increasingly demanding requirements for cable performance, this low-voltage power cable is manufactured, which has excellent flame retardant properties, real-time temperature monitoring function, good anti-interference performance, and lightweight and high bending stiffness characteristics.

[0037] In preparing the graphene composite copper conductor 1, multiple graphene composite copper wire profiles are first selected and tightly stranded together using a stranding process to form the graphene composite copper conductor 1 required for the power core. This structure, composed of multiple strands of graphene composite copper wire profiles, effectively improves the conductor's conductivity and mechanical strength. Next, graphene oxide fiber sensors 2 are embedded at intervals inside the graphene composite copper conductor 1. These sensors can detect temperature changes during cable operation in real time, providing a basis for subsequent temperature monitoring.

[0038] The cable body consists of multiple graphene composite copper conductors 1, with flame-retardant filler ropes filling between them. These filler ropes not only support and secure the conductors but also provide flame retardancy in high-temperature fire conditions, preventing the spread of fire. Subsequently, a cross-linked polyethylene insulation layer 6 is extruded onto the outer wall of each graphene composite copper conductor 1. The cross-linked polyethylene insulation layer 6 possesses excellent insulation properties, effectively preventing current leakage and ensuring safe and stable power transmission.

[0039] After the conductors and insulation layers are prepared, multiple graphene composite copper conductors 1 are wrapped with a polyimide aluminum foil composite tape shielding layer 5. A graphene film 7 is deposited on the outer surface of the polyimide aluminum foil composite tape shielding layer 5, and magnetic particles are doped onto the graphene film 7. The graphene film 7 with doped magnetic particles enhances the cable's electromagnetic interference resistance, effectively shielding against external electromagnetic interference and ensuring the stability of signal transmission. Subsequently, thermally responsive hydrogel microcapsules 8 are covered on the outer wall of the graphene film 7. Thermoresponsive hydrogel microcapsules 8 encapsulate ammonium polyphosphate flame retardant. When the cable comes into contact with a high-temperature fire source, the thermoresponsive hydrogel microcapsules 8 will rupture due to heat, releasing the ammonium polyphosphate flame retardant.

[0040] An inner sheath 4 is extruded onto the outer wall of the polyimide aluminum foil composite tape shielding layer 5. The inner sheath 4 protects the internal structure and prevents damage to the cable from the external environment. After the inner sheath 4 is prepared, an armor layer 9 is argon-arc welded onto its outer wall. The outer wall of the armor layer 9 is first coated with a zinc oxide coating. When the zinc oxide coating reacts with the ammonium polyphosphate flame retardant released from the thermally responsive hydrogel microcapsules 8, it can generate an expanded carbon layer, achieving flame-retardant self-healing function. Then, multiple honeycomb holes 11 are formed on the outer wall of the armor layer 9 using laser etching technology. The honeycomb holes 11 are formed with a specific arrangement and spacing to ensure the overall performance of the cable. Inside the honeycomb holes 11, CF / PEEK filler 10, i.e., carbon fiber reinforced polyetheretherketone, is embedded at intervals. This filling method can reduce the weight of the cable and improve its bending stiffness, making the cable less prone to damage during bending.

[0041] Through the above manufacturing process, this low-voltage power cable exhibits excellent flame retardant properties. When exposed to high temperatures during a fire, the thermally responsive hydrogel microcapsules 8 rupture to release ammonium polyphosphate flame retardant, which reacts with zinc oxide to form an expanded carbon layer, effectively preventing the spread of fire and ensuring the cable's safety in a fire. The graphene oxide fiber sensor 2 can monitor cable temperature changes in real time, detecting abnormal heating caused by overload or short circuit in advance, thus reducing the risk of fire. The graphene film 7, doped with magnetic particles, enhances the cable's resistance to electromagnetic interference, ensuring stable signal transmission. The armor layer 9, with honeycomb holes 11 and filled with CF / PEEK filler 10, reduces the cable's weight while improving its bending stiffness, enabling better application in aerospace and high-rise buildings where weight and installation space are critical, thus extending the cable's service life and reliability.

[0042] This application can be used in the field of cables, or in other fields applicable to this application.

[0043] In another embodiment: Reference Figure 1-3A graphene composite copper conductor anti-interference and flame-retardant low-voltage power cable is disclosed. In the cable industry, after the armor layer 9 is prepared, an outer sheath 3 is extruded onto its outer wall. The outer sheath 3 provides the final protective barrier for the cable, protecting it from external physical and chemical corrosion. Flame-retardant layers are provided between the armor layer 9 and the outer sheath 3, and between the inner sheath 4 and the polyimide aluminum foil composite shielding layer 5. These flame-retardant layers are composed of a graphene film 7 deposited on the outer surface of the corresponding structure and containing magnetic particles and thermally responsive hydrogel microcapsules 8.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A graphene composite copper conductor anti-interference and flame-retardant low-voltage power cable, characterized in that, include: A graphene-copper composite conductor (1) has an internally spaced graphene oxide fiber sensor (2). A cross-linked polyethylene insulation layer (6) covering the outside of the graphene composite copper conductor (1). A polyimide aluminum foil composite tape shielding layer covering the outside of multiple conductors (5); A flame-retardant layer is disposed on the outer surface of the polyimide aluminum foil composite tape shielding layer (5), the flame-retardant layer comprising a graphene film (7) doped with magnetic particles and a thermally responsive hydrogel microcapsule (8) covering thereon. Inner sheath (4) covering the outside of the flame retardant layer; Argon arc welded to the armor layer (9) on the outer wall of the inner sheath (4), the outer surface of which is coated with zinc oxide coating and forms a plurality of honeycomb holes (11), the honeycomb holes (11) are filled with CF / PEEK filler (10). The outer sheath (3) covering the outside of the armor layer (9); When the cable comes into contact with a high-temperature fire source, the thermally responsive hydrogel microcapsule (8) ruptures and releases a flame retardant, which reacts with the zinc oxide coating to generate an expanded carbon layer.

2. The graphene composite copper conductor anti-interference and flame-retardant low-voltage power cable according to claim 1, characterized in that: The graphene film (7) of the flame-retardant layer is deposited on the outer surface of the polyimide aluminum foil composite tape shielding layer (5), and the magnetic particles are ferrite particles.

3. The graphene composite copper conductor anti-interference and flame-retardant low-voltage power cable according to claim 1, characterized in that: The thermally responsive hydrogel microcapsules (8) encapsulate ammonium polyphosphate flame retardant, with a rupture temperature of 180℃±10℃.

4. The graphene composite copper conductor anti-interference and flame-retardant low-voltage power cable according to claim 1, characterized in that: The honeycomb holes (11) are distributed in a hexagonal array.

5. The graphene composite copper conductor anti-interference and flame-retardant low-voltage power cable according to claim 1, characterized in that: The graphene oxide fiber sensor (2) is embedded at intervals along the conductor axis.

6. The graphene composite copper conductor anti-interference and flame-retardant low-voltage power cable according to claim 1, characterized in that: The graphene composite copper conductor (1) is made of seven graphene composite copper wires twisted together.

7. The graphene composite copper conductor anti-interference and flame-retardant low-voltage power cable according to claim 1, characterized in that: The flame-retardant filler rope between multiple conductors is a glass fiber rope with zinc oxide attached to its surface.

Images