CN223539345U

CN223539345U - Low-voltage aluminum alloy cable for wind power tower

Info

Publication number: CN223539345U
Application number: CN202422262564.4U
Authority: CN
Inventors: 游靖华; 李文忠; 周清银; 孙勇; 管永生; 章景; 崔科
Original assignee: Hubei Longteng Hongqi Cable Group Co ltd
Current assignee: Hubei Longteng Hongqi Cable Group Co ltd
Priority date: 2024-09-14
Filing date: 2024-09-14
Publication date: 2025-11-11
Anticipated expiration: 2034-09-14

Abstract

The utility model discloses a low-voltage aluminum alloy cable for a wind power tower, which comprises an aluminum alloy conductor, wherein an aluminum pipe is concentrically and tightly sleeved on the outer side of the aluminum alloy conductor, an insulating layer is concentrically and tightly sleeved on the outer side of the aluminum pipe, a flame-retardant wrapping layer is concentrically and tightly sleeved on the outer side of the insulating layer, a flame-retardant sheath layer is concentrically and tightly sleeved on the outer side of the flame-retardant wrapping layer, the conductor is replaced by pure copper or pure aluminum to be aluminum alloy, the performance is ensured, the cost is reduced, and the aluminum pipe is used as a primary protection, so that the characteristics of high strength, good flexibility, small bending radius, non-magnetism and the like are utilized, and the applicability and the quality of the cable are ensured.

Description

Low-voltage aluminum alloy cable for wind power tower

Technical Field

The utility model relates to the technical field of cable preparation, in particular to a low-voltage aluminum alloy cable for a wind power tower.

Background

The power cable is an important component of a wind power plant collector circuit, and in general, the wind power plant cable conductor is selected from an aluminum core and a copper core. The aluminum core cable and the copper core cable have the defects of poor flexibility, easy breakage after repeated bending, poor stability, easy corrosion and oxidation, high resistivity, high energy consumption, high loss, poor ductility, inconvenient installation and the like compared with the copper core with the same section. The copper core cable has the disadvantages of high price, heavy weight and high construction and transportation cost.

The technical requirements of the special aluminum alloy cable for the wind power tower mainly comprise three aspects.

Firstly, because the cable is fixedly laid in the wind power tower, the cable needs to be used in a long-term vibration environment, and the problem of long-term vibration fatigue damage of the cable assembly must be solved, the cable should have long-term vibration fatigue resistance in a design life cycle of 25 years;

Secondly, the wind power transmission cable is intensively laid in the tower, and in order to meet the requirements of environmental protection and safety, the cable must have low smoke, zero halogen, low toxicity, high light transmittance, and excellent flame retardance and flame retardation;

Finally, the cable is also the most critical, and is used as a carrier for transmitting current, and has the function of collecting and transmitting electric energy generated by wind power, so that the cable has good and safe electrical performance, and the wind power system can normally and safely operate in various severe environments.

The existing copper core and aluminum core cable more or less fully meet the technical requirements of the special aluminum alloy cable for the wind power tower in the use process.

Disclosure of utility model

The utility model provides a low-voltage aluminum alloy cable for a wind power tower, and aims to solve the problems that the existing pure copper wire core is high in cost, the pure aluminum wire core is easy to break after repeated bending, poor in stability and high in loss, and the pure copper or pure aluminum wire core cannot meet the technical requirements of a special cable for the wind power tower.

In order to solve the technical problems, the utility model adopts the following technical scheme:

The low-voltage aluminum alloy cable for the wind power tower comprises an aluminum alloy conductor, wherein an aluminum pipe is concentrically and tightly sleeved on the outer side of the aluminum alloy conductor, an insulating layer is concentrically and tightly sleeved on the outer side of the aluminum pipe, a flame-retardant wrapping band layer is concentrically and tightly sleeved on the outer side of the insulating layer, and a flame-retardant sheath layer is concentrically and tightly sleeved on the outer side of the flame-retardant wrapping band layer.

Preferably, the aluminum alloy conductor is in a molded line concentric stranding structure.

Preferably, the aluminum pipe is seamless on the side surface, and the aluminum alloy conductor is embedded in the aluminum pipe in a sealing way.

More preferably, an oxygen barrier layer is arranged between the aluminum alloy conductor and the aluminum pipe, and the aluminum alloy conductor and the aluminum pipe form sealing fit through the oxygen barrier layer.

Further, the oxygen barrier layer is a fire-resistant mica tape.

Preferably, the insulating layer is a crosslinked polyethylene insulating sleeve.

Preferably, the flame-retardant wrapping tape layer is a low-smoke halogen-free polyolefin flame-retardant wrapping tape.

Preferably, the flame retardant sheath layer is a low smoke halogen-free polyolefin flame retardant sheath.

The utility model has the beneficial effects that:

The cable uses the aluminum alloy conductor as a wire core, so that the cost is reduced, the flexibility, the stability and the ductility of the cable are improved, the resistivity is reduced, the protection effect and the roundness of the cable are enhanced through the aluminum pipe, and the cable integrally meets the technical requirements of the aluminum alloy cable special for the wind power tower through the flame-retardant wrapping layer and the flame-retardant sheath layer.

Drawings

FIG. 1 is a schematic cross-sectional view of a cable of the present utility model;

In the figure, 1, an aluminum alloy conductor, 2, an aluminum pipe, 3, an insulating layer, 4, a flame-retardant wrapping layer, 5, a flame-retardant sheath layer and 6, an oxygen-isolating layer.

Detailed Description

Embodiments are further described below with reference to the accompanying drawings.

As shown in fig. 1, as a preferred embodiment 1, a low-voltage aluminum alloy cable for a wind power tower comprises an aluminum alloy conductor 1, wherein an aluminum pipe 2 is concentrically and closely sleeved on the outer side of the aluminum alloy conductor 1, an insulating layer 3 is concentrically and closely sleeved on the outer side of the aluminum pipe 2, a flame-retardant wrapping layer 4 is concentrically and closely sleeved on the outer side of the insulating layer 3, and a flame-retardant sheath layer 5 is concentrically and closely sleeved on the outer side of the flame-retardant wrapping layer 4.

Preferably, the aluminum alloy conductor 1 is an AA8030 aluminum alloy conductor, and the performance pair of the aluminum alloy conductor and the copper conductor is shown in table 1.

TABLE 1

As a preferred embodiment 2, the aluminum alloy conductor 1 is of a molded line concentric twisted structure. After comprehensively considering the outer diameter of a conductor, the flexibility of the conductor, the contact resistance among conductor monofilaments, the surface smoothness and the conductor tightness, a molded line concentric twisting structure is selected, the molded line concentric twisting structure has higher conductor section utilization rate than a compressed structure and a single molded line structure, the diameter can be reduced by about 10% when the sectional areas are the same, and the sectional area of the conductor can be increased by 20% -25% when the sectional areas are the same.

As a preferred embodiment 3, the aluminum pipe 2 is seamless on the side surface, and the aluminum alloy conductor 1 is sealingly embedded in the aluminum pipe 2. Ensuring the protection effect.

An oxygen barrier layer 6 is arranged between the aluminum alloy conductor 1 and the aluminum pipe 2, and the aluminum alloy conductor 1 and the aluminum pipe 2 form sealing fit through the oxygen barrier layer 6.

The oxygen barrier layer 6 is a fire-resistant mica tape. The sealing and protecting effects are ensured, and meanwhile, the influence on the cable property is avoided, so that the cable meets the use technical requirements.

As a preferred embodiment 4, the insulating layer 3 is a crosslinked polyethylene insulating sheath. In order to ensure that the cable has excellent flame retardant and flame retardant resistance, and simultaneously meets the environmental protection and safety requirements of low smoke, no halogen, low toxicity, high light transmittance and the like.

As a preferred embodiment 5, the flame retardant tape layer 4 is a low smoke halogen-free polyolefin flame retardant tape. In order to ensure that the cable has excellent flame retardant and flame retardant resistance, and simultaneously meets the environmental protection and safety requirements of low smoke, no halogen, low toxicity, high light transmittance and the like.

As a preferred embodiment 6, the flame retardant sheath layer 5 is a low smoke halogen-free polyolefin flame retardant sheath. In order to ensure that the cable has excellent flame retardant and flame retardant resistance, and simultaneously meets the environmental protection and safety requirements of low smoke, no halogen, low toxicity, high light transmittance and the like.

The working principle of the utility model is as follows:

According to the cable provided by the utility model, the aluminum alloy conductor is used as the wire core, so that the cost is reduced, the flexibility, the stability and the ductility of the cable are improved, the resistivity is reduced, the protection effect and the roundness of the cable are enhanced through the aluminum pipe, and the cable integrally meets the technical requirements of the aluminum alloy cable special for the wind power tower through the flame-retardant wrapping belt layer and the flame-retardant sheath layer.

Claims

1. The low-voltage aluminum alloy cable for the wind power tower is characterized by comprising an aluminum alloy conductor (1), wherein an aluminum pipe (2) is concentrically and tightly sleeved on the outer side of the aluminum alloy conductor (1), an insulating layer (3) is concentrically and tightly sleeved on the outer side of the aluminum pipe (2), a flame-retardant wrapping band layer (4) is concentrically and tightly sleeved on the outer side of the insulating layer (3), and a flame-retardant sheath layer (5) is concentrically and tightly sleeved on the outer side of the flame-retardant wrapping band layer (4).

2. The low-voltage aluminum alloy cable for wind power towers according to claim 1, wherein the aluminum alloy conductor (1) is of a molded line concentric stranding structure.

3. The low-voltage aluminum alloy cable for wind power towers according to claim 1, wherein the aluminum pipe (2) is seamless in side surface, and the aluminum alloy conductor (1) is hermetically embedded in the aluminum pipe (2).

4. A low-voltage aluminum alloy cable for a wind power tower according to claim 3, characterized in that an oxygen barrier layer (6) is arranged between the aluminum alloy conductor (1) and the aluminum pipe (2), and the aluminum alloy conductor (1) is in sealing fit with the aluminum pipe (2) through the oxygen barrier layer (6).

5. The low-voltage aluminum alloy cable for wind power towers according to claim 4, wherein the oxygen barrier layer (6) is a fire-resistant mica tape.

6. The low-voltage aluminum alloy cable for wind power towers according to claim 1, characterized in that the insulating layer (3) is a crosslinked polyethylene insulating sleeve.

7. The low-voltage aluminum alloy cable for wind power towers according to claim 1, wherein the flame-retardant wrapping tape layer (4) is a low-smoke halogen-free polyolefin flame-retardant wrapping tape.

8. The low-voltage aluminum alloy cable for wind power towers according to claim 1, wherein the flame-retardant sheath layer (5) is a low-smoke halogen-free polyolefin flame-retardant sheath.