Low-voltage cable for offshore wind power generation

Abstract

The utility model relates to the technical field of cables, and discloses a low-voltage cable for offshore wind power generation, which comprises a protective layer and a plurality of cable core assemblies, an anti-torsion support is arranged in the protective layer, and the cable core assemblies are isolated by the anti-torsion support. According to the anti-torsion cable, the anti-torsion support is arranged in the cable, the anti-torsion support can isolate the cable core assembly while improving the overall anti-torsion performance of the cable, the situation that the service life of the cable is shortened due to torsion of the cable in the use process can be prevented, and the installation shaft and the reinforcing plates arranged on the peripheral side of the installation shaft are arranged; the overall shape of the cable is maintained through cooperation with the arc-shaped support, the torsion resistance of the cable can be greatly improved through the reinforcing plates distributed in the radial direction, and the torsion resistance holes are arranged to be of a triangular structure, so that the structures of the torsion resistance holes are stable, and good stress capacity is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a low-voltage cable for offshore wind power generation. Background Art

[0002] As a clean, renewable new energy, wind energy has attracted widespread attention from countries around the world. Wind energy is inexhaustible, and wind power is a clean energy that can reduce traditional petrochemical energy consumption and reduce carbon dioxide emissions.

[0003] Compared with onshore wind farms, the marine environment where offshore wind turbines are located is very complex and harsh, and they are subjected to a variety of random loads that vary with time and space, including wind, waves, currents, sea ice and tides acting on the structure, and are also threatened by earthquakes. Under such harsh environmental conditions, adverse factors such as environmental corrosion, marine biological attachment, foundation soil scouring and foundation dynamic softening, material aging, component defects and mechanical damage, fatigue and crack extension damage accumulation will lead to the attenuation of offshore wind turbine structural components and overall resistance, affecting the operational safety and durability of the wind turbine structure. As an important component for transmitting power for offshore wind turbines, high-current-carrying torsion-resistant power cables for offshore wind turbines are also affected by the harsh environment in which most wind turbines are located, which seriously affects the service life of the product. The existing low-voltage cables for offshore wind power generation have poor torsion resistance. Summary of the invention

[0004] In view of this, the purpose of the utility model is to provide a low-voltage cable for offshore wind power generation, so as to solve the problem of poor torsion resistance of the existing low-voltage cable for offshore wind power generation.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] A low-voltage cable for offshore wind power generation comprises a protective layer and a plurality of cable core assemblies. An anti-torsion bracket is arranged in the protective layer, and the cable core assemblies are isolated by the anti-torsion bracket.

[0007] In the present application, an anti-torsion bracket is provided in the cable, which can improve the overall anti-torsion performance of the cable and isolate the cable core assembly, thereby preventing the cable from being twisted during use and causing the cable life to be reduced.

[0008] Further preferably, the anti-torsion bracket includes a mounting shaft and a plurality of reinforcing plates arranged on the circumferential side of the mounting shaft, one end of the reinforcing plate is connected to the mounting shaft, and the other end is provided with an arc-shaped bracket near the protective layer, and the reinforcing plate is fixedly connected to the arc-shaped bracket.

[0009] In the present application, an installation shaft and a reinforcing plate arranged on the circumferential side of the installation shaft are provided, and the arc-shaped bracket is used to maintain the overall shape of the cable. The reinforcing plates distributed along the radial direction can greatly improve the torsional resistance of the cable.

[0010] Further preferably, an anti-torsion hole is provided in the installation shaft along the length direction.

[0011] In the present application, an anti-torsion hole is provided in the installation shaft, and an auxiliary reinforcement plate is used to improve the overall anti-torsion performance of the cable.

[0012] Further preferably, the cross section of the anti-torsion hole is triangular.

[0013] In the present application, the anti-torsion hole is set to a triangular structure, so that the structure of the anti-torsion hole is stable and has good force-bearing capacity.

[0014] Further preferably, the cross section of the anti-torsion hole is square.

[0015] Further preferably, the reinforcing plate is provided with a plurality of reinforcing ribs along the length direction.

[0016] Further preferably, the cable core assembly is flat, and comprises a pressure-resistant layer and a plurality of low-voltage core wires encapsulated in the pressure-resistant layer, and an insulating layer is provided between the low-voltage core wires and the pressure-resistant layer.

[0017] In the present application, the cable core assembly is configured to be flat, so that the cable core assembly can be used as a reinforcement plate, thereby improving the overall force-bearing performance of the device while ensuring the cable signal transmission capacity.

[0018] Beneficial effects of the utility model:

[0019] 1. In the present application, an anti-torsion bracket is provided in the cable, which can improve the overall anti-torsion performance of the cable and isolate the cable core assembly, thereby preventing the cable from being twisted during use, which may reduce the life of the cable.

[0020] 2. The present application provides an installation shaft and a reinforcing plate arranged on the circumferential side of the installation shaft, which cooperate with the arc-shaped bracket to maintain the overall shape of the cable. The reinforcing plates distributed along the radial direction can greatly improve the torsional resistance of the cable.

[0021] 3. In the present application, the anti-torsion hole is set to a triangular structure, so that the structure of the anti-torsion hole is stable and has good force-bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model cable;

[0023] Figure 2 It is a schematic cross-sectional view of the cable of the utility model;

[0024] in,

[0025] 10. Protective layer; 11. Filling layer;

[0026] 20. Cable core assembly; 21. Pressure-resistant layer; 22. Low-voltage core wire; 23. Insulation layer;

[0027] 30. Anti-torsion bracket; 31. Mounting shaft; 32. Reinforcement plate; 33. Arc bracket; 34. Anti-torsion hole; 35. Reinforcement rib. DETAILED DESCRIPTION

[0028] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0029] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the figures, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] like Figure 1-2 As shown, the present application provides a low-voltage cable for offshore wind power generation. The cable includes a protective layer 10 and a plurality of cable core assemblies 20. The protective layer 10 is used as the outermost layer to ensure the sealing of the entire cable. An anti-torsion bracket 30 is provided in the protective layer 10. The anti-torsion bracket 30 is used to isolate the cable core assembly 20.

[0031] An arc-shaped bracket 33 is provided on the inner wall of the protective layer 10. The anti-torsion bracket 30 includes a mounting shaft 31 and a plurality of reinforcing plates 32 arranged on the circumference of the mounting shaft 31. The reinforcing plates 32 are radially distributed along the mounting shaft 31. One end of the reinforcing plate 32 is connected to the mounting shaft 31, and the other end is connected to the arc-shaped bracket 33. The arc-shaped bracket 33 is also used to improve the compression resistance of the cable and ensure the structural stability of the cable. The length direction of the reinforcing plate 32 is parallel to the length direction of the mounting shaft 31. The number of reinforcing plates 32 can be set according to the number of cable core assemblies 20. In the present application, three reinforcing plates 32 and three cable core assemblies 20 are provided, and a triangular stable structure can be formed between the reinforcing plates 32. The radially distributed reinforcing plates 32 can improve the anti-torsion performance of the cable and prevent the cable from twisting.

[0032] The installation shaft 31 is provided with an anti-torsion hole 34 along the length direction. The anti-torsion hole 34 is a regular polygonal structure. The cross section of the anti-torsion hole 34 can be a regular triangle or a square. The present application opens a square hole in the installation shaft 31 to improve the anti-torsion performance of the installation shaft 31.

[0033] A plurality of reinforcing ribs 35 are arranged along the length direction of the reinforcing plate 32. In order to further improve the torsion resistance of the reinforcing plate 32, the present application arranges reinforcing ribs 35 on the reinforcing plate 32 to prevent the reinforcing plate 32 from twisting or bending.

[0034] The cable core assembly 20 is flat. The cable core assembly 20 can be arranged along the radial direction of the installation axis 31. In this way, the cable core assembly 20 can be used as a reinforcing plate. The cable core assembly 20 includes a pressure-resistant layer 21 and a plurality of low-voltage core wires 22 wrapped in the pressure-resistant layer 21. An insulating layer 23 is provided between the low-voltage core wires 22 and the pressure-resistant layer 21.

[0035] In the present application, a filling layer 11 is provided between the reinforcing plate 32 and the pressure-resistant layer 21. The filling layer 11 is used to maintain the position of the cable core assembly 20 to prevent the cable core assembly 20 from being offset.

[0036] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. A low voltage cable for offshore wind power generation, characterized in that: It comprises a protective layer (10) and a plurality of cable core assemblies (20), wherein an anti-torsion bracket (30) is arranged in the protective layer (10), and the cable core assemblies (20) are isolated by the anti-torsion bracket (30).

2. The low-voltage cable for offshore wind power generation according to claim 1, characterized in that: The anti-torsion bracket (30) comprises a mounting shaft (31) and a plurality of reinforcing plates (32) arranged on the periphery of the mounting shaft (31); one end of the reinforcing plate (32) is connected to the mounting shaft (31); and the other end of the reinforcing plate (32) is provided with an arc-shaped bracket (33) near the protective layer (10); the reinforcing plate (32) is fixedly connected to the arc-shaped bracket (33).

3. The low-voltage cable for offshore wind power generation according to claim 2, characterized in that: An anti-twist hole (34) is arranged inside the installation shaft (31) along the length direction.

4. The low-voltage cable for offshore wind power generation according to claim 3, characterized in that: The cross section of the anti-torsion hole (34) is triangular.

5. The low-voltage cable for offshore wind power generation according to claim 3, characterized in that: The cross section of the anti-torsion hole (34) is square.

6. The low-voltage cable for offshore wind power generation according to claim 2, characterized in that: The reinforcing plate (32) is provided with a plurality of reinforcing ribs (35) along the length direction.

7. The low-voltage cable for offshore wind power generation according to claim 1, characterized in that: The cable core assembly (20) is flat, and comprises a pressure-resistant layer (21) and a plurality of low-voltage core wires (22) wrapped in the pressure-resistant layer (21), and an insulating layer (23) is provided between the low-voltage core wires (22) and the pressure-resistant layer (21).

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