Tensile corrosion-resistant aluminum alloy high-voltage cable

Abstract

The utility model discloses a tensile corrosion-resistant aluminum alloy high-voltage cable, which relates to the field of high-voltage cables and comprises a cable core, a composite tensile layer is wrapped outside the cable core, the composite tensile layer is formed by laminating a plurality of tensile fiber layers and a plurality of reinforced resin matrixes, a composite corrosion-resistant sheath is wrapped outside the composite tensile layer, and the composite corrosion-resistant sheath is wrapped outside the cable core. The composite anti-corrosion sheath is composed of an inner anti-corrosion coating, a reinforced fiber mesh layer, an anti-corrosion blocking layer and a protection layer. The problem that the high-voltage cable is poor in corrosion resistance and tensile performance is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage cables, and particularly relates to a tensile-resistant and corrosion-resistant aluminum alloy high-voltage cable. Background Technique

[0002] High-voltage cables are a type of power cable specifically used to transmit electricity with voltage levels between 1 kV and 1000 kV. High-voltage cables have a large transmission capacity and can meet the requirements of the power system for high-power transmission, transmitting the electric energy generated by power plants from the production site to the consumption site, including urban power grids, regional power grids, and long-distance power transmission between countries.

[0003] For example, the Chinese authorized patent "A High-Voltage Cable" with the publication number CN208706320U includes a first fixing sleeve, reinforcing ribs, a protection device, an alumina insulation coating, a waterproof protection sleeve, a copper core, an epoxy resin anti-static coating, and a heat dissipation device. The outside of the first fixing sleeve is evenly provided with a heat dissipation device, the first fixing sleeve is evenly coated with an epoxy resin anti-static coating, the inside of the first fixing sleeve is evenly embedded with reinforcing ribs, the inside of the first fixing sleeve is evenly distributed with waterproof protection sleeves, and a protection device is connected between adjacent waterproof protection sleeves. The waterproof protection sleeve is evenly coated with an alumina insulation coating, and a copper core is arranged inside the waterproof protection sleeve; the heat dissipation device is composed of a first heat dissipation hole, a heat conduction column, a second heat dissipation hole, and a second fixing sleeve, and the outside of the second fixing sleeve is evenly provided with the first heat dissipation hole.

[0004] Although the above-mentioned prior art can achieve the heat dissipation of high-voltage cables, the overall tensile resistance and corrosion resistance are poor. Corrosion will cause defects such as cracks and holes in the cable insulation layer, thereby reducing its insulation performance. When the tensile resistance of the high-voltage cable is insufficient, it is prone to break under external forces. This will not only affect the normal operation of the cable but also may cause power interruption, bringing serious losses to the power system. Therefore, it does not meet the existing requirements, and for this reason, we propose a tensile-resistant and corrosion-resistant aluminum alloy high-voltage cable. Content of the Utility Model

[0005] The purpose of the utility model is to provide a tensile-resistant and corrosion-resistant aluminum alloy high-voltage cable to solve the problems of poor corrosion resistance and tensile performance of high-voltage cables mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A tensile-resistant and corrosion-resistant aluminum alloy high-voltage cable includes a cable core, the outside of the cable core is wrapped with a composite tensile layer, the composite tensile layer is composed of multiple layers of tensile fiber layers and multiple layers of reinforced resin matrix layers stacked together, the outside of the composite tensile layer is wrapped with a composite anti-corrosion sheath, and the composite anti-corrosion sheath is composed of an inner anti-corrosion coating, a reinforced fiber mesh layer, an anti-corrosion barrier layer, and a protective layer.

[0007] Preferably, the fibers of the tensile fiber layer are laid at a fixed angle and density to form an intersecting network structure. After laying each layer of the tensile fiber layer, the adjacent tensile fiber layers are tightly bonded through the penetration and curing process of the reinforcing resin matrix.

[0008] Preferably, the inner anti-corrosion coating is attached to the inner wall of the reinforced fiber mesh layer through a spraying device, the anti-corrosion barrier layer is wrapped around the outside of the reinforced fiber mesh layer through an extrusion device, and the protective layer is wrapped around the outer wall of the anti-corrosion barrier layer through an extrusion device.

[0009] Preferably, at least four annularly distributed sector conductors are provided inside the cable core, a central conductor is provided at the central position between the plurality of sector conductors, and there is a gap between the sector conductors and the central conductor.

[0010] Preferably, both the sector conductor and the central conductor are composed of a conductor and an inner insulating layer, and the inner insulating layer is wrapped around the outer wall of the conductor through an extrusion device.

[0011] Preferably, a reinforcing core is inserted at the central position of the central conductor.

[0012] Preferably, the gap between the sector conductor and the central conductor is filled with epoxy resin.

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

[0014] 1. By providing a composite tensile layer, the composite tensile layer is composed of multiple layers of tensile fiber layers and a reinforcing resin matrix laminated together. The combination of multiple fiber reinforcing layers and a high-performance resin matrix enables the composite tensile layer to have extremely high tensile strength and stiffness, and can effectively resist the tensile force of the cable under various working conditions. Compared with traditional metal materials, the fiber-reinforced composite material has a lighter weight and lower cost, which helps to reduce the overall weight of the cable and lower the production cost. The use of a high-performance resin matrix improves the heat resistance, corrosion resistance, and fatigue resistance of the composite layer, ensuring that the cable can maintain stable performance in harsh environments. By adjusting the material, arrangement, and density of the fibers and the formula of the resin matrix, the performance of the composite tensile layer can be flexibly designed to meet specific requirements in different application scenarios.

[0015] 2. The utility model is provided with a composite anti-corrosion sheath as the outer sheath of the high-voltage cable, which is composed of an inner anti-corrosion coating, a reinforcing fiber mesh layer, an anti-corrosion barrier layer and a protective layer. The composite anti-corrosion sheath not only enhances the anti-corrosion ability of the cable, but also improves the insulation performance, heat resistance performance and electromagnetic shielding performance of the cable, providing a more reliable guarantee for power transmission. The addition of the reinforcing fiber mesh layer and the middle barrier layer significantly improves the mechanical strength and impact resistance of the sheath, protecting the cable from external damage. The existence of the outer wear-resistant protective layer effectively resists mechanical wear and the erosion of the external environment, maintaining the beauty of the cable appearance and the integrity of its functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the utility model;

[0017] Figure 2 is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3 is a schematic diagram of the composite tensile layer structure of the utility model;

[0019] Figure 4 is a schematic diagram of the composite anti-corrosion sheath structure of the utility model.

[0020] In the figure: 1, cable core; 2, sector conductor; 3, center conductor; 4, composite tensile layer; 41, tensile fiber layer; 42, reinforced resin matrix; 5, composite anti-corrosion sheath; 51, inner anti-corrosion coating; 52, reinforcing fiber mesh layer; 53, anti-corrosion barrier layer; 54, protective layer; 6, strengthening core; 7, conductor; 8, inner insulation layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] Please refer to Figures 1-4 , an embodiment provided by the present utility model: a tensile and corrosion-resistant aluminum alloy high-voltage cable, including a cable core 1, the outside of the cable core 1 is wrapped with a composite tensile layer 4, the composite tensile layer 4 is composed of multiple layers of tensile fiber layers 41 and multiple layers of reinforced resin matrix 42 stacked, and the outside of the composite tensile layer 4 is wrapped with a composite anti-corrosion sheath 5, and the composite anti-corrosion sheath 5 is composed of an inner anti-corrosion coating 51, a reinforcing fiber mesh layer 52, an anti-corrosion barrier layer 53 and a protective layer 54.

[0023] The addition of the composite tensile layer 4 not only enhances the tensile strength of the cable but also helps improve the voltage resistance, insulation performance, and electromagnetic shielding performance of the cable, providing a more reliable guarantee for power transmission. The multi-layer anti-corrosion structure, combined with high-performance anti-corrosion materials, provides comprehensive anti-corrosion protection for the cable and extends the service life of the cable.

[0024] Please refer to Figure 2 and Figure 3 , the fibers of the tensile fiber layer 41 are laid at a fixed angle and density to form an interlaced network structure. After laying each layer of the tensile fiber layer 41, through the penetration and curing process of the reinforcing resin matrix 42, the adjacent tensile fiber layers 41 are tightly bonded. The tensile fiber layer 41 uses high-strength and high-modulus aramid fibers as the core tensile material, which has extremely high tensile strength and stiffness and is light in weight; the reinforcing resin matrix 42 selects high-performance resins such as epoxy resin or thermosetting polyimide as the matrix material, which has excellent mechanical properties, heat resistance, and corrosion resistance, can effectively bond the fibers and transfer the load, tightly bond the fiber layers together to form an integral composite structure, and at the same time provide additional stiffness and strength support.

[0025] Please refer to Figure 2 and Figure 4 , the inner anti-corrosion coating 51 is attached to the inner wall of the reinforced fiber mesh layer 52 through a spraying device, the anti-corrosion barrier layer 53 is wrapped around the outside of the reinforced fiber mesh layer 52 through an extrusion device, and the protective layer 54 is wrapped around the outer wall of the anti-corrosion barrier layer 53 through an extrusion device. The inner anti-corrosion coating 51 uses polytetrafluoroethylene, which has excellent chemical corrosion resistance, high temperature resistance, and low friction coefficient, and directly covers the cable conductor or insulation layer to form the first anti-corrosion barrier to prevent corrosive substances from directly contacting the core part of the cable; the reinforced fiber mesh layer 52 is made of a glass fiber woven network structure, which not only has high strength but also provides a certain degree of flexibility, enhances the mechanical strength of the sheath, prevents external impacts and squeezes from damaging the inside of the cable, and at the same time maintains the integrity of the sheath; the anti-corrosion barrier layer 53 uses a ceramicized polymer material, which has high chemical stability and barrier performance, further blocks corrosive substances, and at the same time serves as a support for the reinforced fiber mesh layer to ensure the stability of the entire sheath structure; the protective layer 54 selects polyethylene material, which has good wear resistance, anti-aging performance, and weather resistance, is protected from mechanical wear and the external environment, and extends the service life of the cable.

[0026] Please refer to Figure 1 and Figure 2, at least four sector conductors 2 distributed annularly are provided inside the cable core 1. A center conductor 3 is provided at the central position among the multiple sector conductors 2. There is a gap between the sector conductor 2 and the center conductor 3. Both the sector conductor 2 and the center conductor 3 are composed of a conductor 7 and an inner insulating layer 8. The inner insulating layer 8 is wrapped on the outer wall of the conductor 7 through an extrusion device. A strengthening core 6 is inserted through the central position of the center conductor 3. The gap between the sector conductor 2 and the center conductor 3 is filled with epoxy resin. The conductor 7 uses AA8030 series aluminum alloy as the core conductor material. Through special alloying treatment (adding elements such as copper, iron, magnesium, and silicon) and annealing process, not only the conductivity is improved (about 61.8% of that of copper), but also the tensile strength and corrosion resistance are significantly enhanced; the high conductivity, high strength, excellent anti-creep performance, and corrosion resistance ensure that the cable maintains stable performance under long-term overload and complex environments. The inner insulating layer 8 uses cross-linked polyethylene, which has excellent electrical insulation performance, high temperature resistance, and mechanical strength, and can effectively prevent current leakage and ensure the safety of power transmission.

[0027] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A tensile and corrosion-resistant aluminum alloy high-voltage cable, comprising a cable core (1), characterized in that: The cable core (1) is wrapped with a composite tensile layer (4) on the outside, the composite tensile layer (4) being composed of a plurality of tensile fiber layers (41) and a plurality of reinforced resin matrices (42) stacked on top of each other, the composite tensile layer (4) being wrapped with a composite anti-corrosion sheath (5) on the outside, the composite anti-corrosion sheath (5) being composed of an inner anti-corrosion coating (51), a reinforced fiber mesh layer (52), an anti-corrosion barrier layer (53) and a protective layer (54).

2. The tensile and corrosion-resistant aluminum alloy high-voltage cable according to claim 1 is characterized in that: The fibers of the tensile fiber layer (41) are laid at a fixed angle and density to form a staggered mesh structure, and after each layer of the tensile fiber layer (41) is laid, adjacent tensile fiber layers (41) are tightly bonded through the penetration and curing process of the reinforcing resin matrix (42).

3. The tensile and corrosion-resistant aluminum alloy high-voltage cable according to claim 1 is characterized in that: The inner anti-corrosion coating (51) is attached to the inner wall of the reinforcing fiber mesh layer (52) by means of a spraying device, the anti-corrosion barrier layer (53) is wrapped around the outside of the reinforcing fiber mesh layer (52) by means of an extrusion device, and the protective layer (54) is wrapped around the outer wall of the anti-corrosion barrier layer (53) by means of an extrusion device.

4. The tensile and corrosion-resistant aluminum alloy high-voltage cable according to claim 1 is characterized in that: At least four annularly distributed sector-shaped conductors (2) are arranged inside the cable core (1); a central conductor (3) is arranged at the center between the plurality of sector-shaped conductors (2); and a gap exists between the sector-shaped conductors (2) and the central conductor (3).

5. The tensile and corrosion-resistant aluminum alloy high-voltage cable according to claim 4 is characterized in that: The sector-shaped conductor (2) and the circular core conductor (3) are both composed of a conductor (7) and an inner insulating layer (8), and the inner insulating layer (8) is wrapped around the outer wall of the conductor (7) by an extrusion device.

6. The tensile and corrosion-resistant aluminum alloy high-voltage cable according to claim 4, characterized in that: A reinforcing core (6) is inserted into the center of the circular conductor (3).

7. The tensile and corrosion-resistant aluminum alloy high-voltage cable according to claim 4, characterized in that: The gap between the sector-shaped conductor (2) and the central conductor (3) is filled with epoxy resin.

Images