High-flexibility wind power generation cable

Abstract

The invention relates to the technical field of wind power cables, in particular to a high-flexibility wind power generation cable which sequentially comprises a conductive cable core, a waterproof layer, a high-flexibility sheath, a low-temperature-resistant protective layer and a weather-resistant outer sleeve from inside to outside, and the conductive cable core is composed of a main conductive conductor and a plurality of auxiliary conductive conductors which are twisted around the main conductive conductor. The high-flexibility sheath is of an inner-outer double-layer structure, a gap exists between the inner layer and the outer layer, and the high-flexibility sheath is in circumferential limiting fit with the waterproof layer and the low-temperature-resistant protection layer correspondingly through the inner layer and the outer layer. According to the high-flexibility wind power generation cable, the high-flexibility sheath is arranged and is matched with the conductive cable core made of the high-flexibility aluminum alloy monofilaments, so that the wind power generation cable has high flexibility, good flexibility can still be kept in a severe outdoor environment, and the high-flexibility wind power generation cable is prevented from being damaged due to the low-temperature-resistant protective layer, the weather-resistant outer sleeve and the corrosion-resistant protective film. Therefore, the wind power generation cable can better adapt to different use environments, and the application range is widened.

Description

Technical Field

[0001] The invention relates to the technical field of wind power cables, in particular to a highly flexible wind power generation cable. Background Art

[0002] Wind energy is a renewable and clean energy source. Wind power generation is the most mature and large-scale power resource. In recent years, my country's wind power generation industry has developed rapidly, with the total installed capacity and annual new installed capacity of wind power ranking among the top in the world. With the national policy leaning towards clean energy, the wind power market has begun to explode, and the demand for wind power cables has also increased sharply.

[0003] Since the environment where wind power generation equipment is installed and used is relatively harsh, especially the cables used in offshore wind power generation systems, they not only need to be resistant to high and low temperatures, as well as highly flexible and flame retardant, but also need to be able to prevent salt corrosion in seawater, hydrolysis, and antibacterial and acid resistance. Due to the long coastline of my country, the environment is complex and diverse, and the climate is even more complex and changeable, so the temperature difference in the environment is large. In order to ensure the normal operation of wind power generation facilities, the structure and materials of the existing cables in the wind turbine cabin should be improved, especially the technical requirements for its low temperature resistance, high flexibility, corrosion resistance and weather resistance should be improved. It can be seen that ordinary medium-voltage cables for wind power generation can no longer meet market demand. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes a highly flexible wind power generation cable.

[0005] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0006] A highly flexible wind power generation cable comprises, from the inside to the outside, a conductive cable core, a waterproof layer, a highly flexible sheath, a low-temperature resistant protective layer, and a weather-resistant outer jacket. The conductive cable core consists of a main conductive conductor and a plurality of secondary conductive conductors twisted around the main conductive conductor. The highly flexible sheath is an inner and outer double-layer structure with a gap between the inner and outer layers. The highly flexible sheath is circumferentially limited with the waterproof layer and the low-temperature resistant protective layer through the inner and outer layers.

[0007] As a preferred technical solution of the present invention, the exteriors of the plurality of secondary conductive conductors are coated with an insulating layer, and the insulating layer is a thermoplastic elastomer.

[0008] As a preferred technical solution of the present invention, the main conductive conductor and the secondary conductive conductor are highly flexible aluminum alloy monofilaments.

[0009] As a preferred technical solution of the present invention, the waterproof layer is a waterproof sheath made of aluminum-plastic composite material.

[0010] As a preferred technical solution of the present invention, the high-flexibility sheath includes an inner sleeve that is circumferentially limited with the waterproof layer, an outer sleeve that is circumferentially limited with the low-temperature resistant protective layer, and a connecting strip edge connected to the inner sleeve and the outer sleeve, the connecting strip edge is an arc-shaped structure, and there are several connecting strip edges evenly distributed along the circumference. Two adjacent connecting strip edges and the inner sleeve and the outer sleeve form a flexible cavity. The inner sleeve, the outer sleeve, and the connecting strip edge are an integrated structure, and the high-flexibility sheath is made of rubber material.

[0011] The beneficial effects of the present invention are:

[0012] The present invention provides a highly flexible wind power generation cable. By providing a highly flexible sheath and cooperating with a conductor cable core made of a highly flexible aluminum alloy monofilament, the wind power generation cable has high flexibility, ensuring that it can still maintain good flexibility in harsh outdoor environments. In addition, through the low-temperature resistant protective layer, weather-resistant outer jacket and corrosion-resistant protective film, the wind power generation cable can better adapt to different usage environments and improve the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0014] Figure 1 It is a schematic diagram of the shaft side structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the high-flexibility sheath in the present invention;

[0017] Figure 4 It is a schematic diagram of the structure of the low-temperature resistant protective layer in the present invention.

[0018] In the figure: 1. main conductive conductor; 2. secondary conductive conductor; 3. insulating layer; 4. waterproof layer; 41. inner groove; 5. highly flexible sheath; 51. inner sleeve; 52. outer sleeve; 53. connecting edge; 54. flexible cavity; 55. inner convex edge; 56. outer convex edge; 6. low temperature resistant protective layer; 61. outer groove; 7. weather resistant outer sleeve; 8. corrosion resistant protective film. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0020] like Figures 1 to 4As shown, a highly flexible wind power generation cable includes, from the inside to the outside, a conductive cable core, a waterproof layer 4, a highly flexible sheath 5, a low temperature resistant protective layer 6, and a weather resistant jacket 7. The conductive cable core is composed of a main conductive conductor 1 and a plurality of secondary conductive conductors 2 twisted around the main conductive conductor 1. In this embodiment, six secondary conductive conductors 2 are provided. The conductive cable core is coated with an insulating layer 3 made of a thermoplastic elastomer, which not only acts as an insulator, but also has a certain elasticity and flexibility. Further, in order to ensure the high flexibility of the cable, the main conductive conductor 1 and the secondary conductive conductor 2 in this embodiment are made of highly flexible aluminum alloy monofilaments. The waterproof layer 4 is a waterproof jacket made of aluminum-plastic composite material. The low temperature resistant protective layer 6 is a protective jacket made of silicone rubber material, and it is coated on the outside of the highly flexible jacket 5. Therefore, it can effectively protect the highly flexible jacket 5 inside it in a low temperature environment and is not affected by the external low temperature environment. The outer wall of the weather resistant jacket 7 is provided with a corrosion resistant protective film 8. The cooperation of the two makes the wind power generation cable have weather and corrosion resistance.

[0021] As a further improvement of this embodiment, the high-flexibility sheath 5 is a double-layer structure with a gap between the inner and outer layers. The high-flexibility sheath 5 is circumferentially limited with the waterproof layer 4 and the low-temperature resistant protective layer 6 through the inner and outer layers.

[0022] As a further improvement of the above embodiment, the high-flexibility sheath 5 includes an inner sleeve 51 that is circumferentially limited with the waterproof layer 4, an outer sleeve 52 that is circumferentially limited with the low-temperature resistant protective layer 6, and a connecting edge 53 connected to the inner sleeve 51 and the outer sleeve 52. The connecting edge 53 is an arc-shaped structure, and there are several connecting edges 53 evenly distributed along the circumference. In this embodiment, there are sixteen connecting edges 53; two adjacent connecting edges 53 and the inner sleeve 51 and the outer sleeve 52 form a flexible cavity 54, and the inner sleeve 51, the outer sleeve 52, and the connecting edge 53 are an integrated structure, and the high-flexibility sheath 5 is made of rubber material. The outer wall of the inner sleeve 51 is evenly distributed with four inner convex edges 55, and the outer wall of the outer sleeve 52 is evenly distributed with four outer convex edges 56. The four inner convex edges 55 and the four outer convex edges 56 are staggered in the axial direction to ensure that when twisting or bending occurs due to external force, the inner and outer sides can interact with each other and be evenly stressed. The outer wall of the waterproof layer 4 is provided with four inner grooves 41 that match the four inner convex edges 55. The inner wall of the low temperature resistant protective layer 6 is provided with four outer grooves 61 that match the four outer convex edges 56.

[0023] When in use, the weather-resistant jacket 7 and corrosion-resistant protective film 8 on the outside of the wind power cable can protect the cable from the adverse external environment, and the low-temperature resistant protective layer 6 can ensure that the cable works normally in a low-temperature environment; the high-flexibility sheath 5 can provide the cable with high flexibility, ensuring that the cable always maintains its flexibility; the waterproof layer 4 can ensure that external water or water vapor cannot penetrate into the conductive cable core inside it; the conductive cable core not only plays the role of conducting electricity, but also has high flexibility itself.

[0024] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A highly flexible wind power cable, characterized in that: The invention comprises, from the inside to the outside, a conductive cable core, a waterproof layer (4), a highly flexible sheath (5), a low-temperature resistant protective layer (6), and a weather-resistant outer jacket (7); the conductive cable core is composed of a main conductive conductor (1) and a plurality of secondary conductive conductors (2) twisted around the main conductive conductor (1); the highly flexible sheath (5) is an inner and outer double-layer structure, and there is a gap between the inner and outer layers; the highly flexible sheath (5) is circumferentially limitedly matched with the waterproof layer (4) and the low-temperature resistant protective layer (6) through the inner layer and the outer layer.

2. A highly flexible wind power generation cable according to claim 1, characterized in that: The exterior of a plurality of secondary conductive conductors (2) is covered with an insulating layer (3), wherein the insulating layer (3) is a thermoplastic elastomer.

3. A highly flexible wind power cable according to claim 1, characterized in that: The main conductive conductor (1) and the secondary conductive conductor (2) are highly flexible aluminum alloy monofilaments.

4. A highly flexible wind power generation cable according to claim 1, characterized in that: The waterproof layer (4) is a waterproof sheath made of an aluminum-plastic composite material.

5. A highly flexible wind power generation cable according to claim 1, characterized in that: The highly flexible protective sleeve (5) comprises an inner sleeve (51) which is circumferentially limited with the waterproof layer (4), an outer sleeve (52) which is circumferentially limited with the low-temperature resistant protective layer (6), and a connecting edge (53) connected to the inner sleeve (51) and the outer sleeve (52); the connecting edge (53) is an arc-shaped structure; a plurality of connecting edges (53) are evenly distributed along the circumference; two adjacent connecting edges (53) and the inner sleeve (51) and the outer sleeve (52) form a flexible cavity (54); the inner sleeve (51), the outer sleeve (52) and the connecting edge (53) are an integrated structure; and the highly flexible protective sleeve (5) is made of rubber material.

6. A highly flexible wind power generation cable according to claim 5, characterized in that: The outer wall of the inner sleeve (51) is evenly distributed with four inner convex edges (55) on the circumference, and the outer wall of the outer sleeve (52) is evenly distributed with four outer convex edges (56) on the circumference. The four inner convex edges (55) and the four outer convex edges (56) are staggered in the axial direction.

7. A highly flexible wind power generation cable according to claim 6, characterized in that: Four inner grooves (41) matching with the four inner convex edges (55) are arranged on the outer wall of the waterproof layer (4).

8. A highly flexible wind power generation cable according to claim 6, characterized in that: Four outer grooves (61) matching with the four outer convex edges (56) are arranged on the inner wall of the low-temperature resistant protective layer (6).

9. A highly flexible wind power generation cable according to claim 1, characterized in that: The low temperature resistant protective layer (6) is a protective sleeve made of silicone rubber material.

10. A highly flexible wind power cable according to claim 1, characterized in that: A corrosion-resistant protective film (8) is provided on the outer wall of the weather-resistant outer jacket (7).

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