Cable for offshore wind power generation

Abstract

The utility model relates to the technical field of cables, and discloses a cable for offshore wind power generation, which comprises a wire core, an insulating layer wrapped outside the wire core, a metal shielding layer arranged outside the insulating layer, a filling layer arranged between the metal shielding layer and the insulating layer, a heat preservation layer wrapped outside the metal shielding layer, and a first protection layer wrapped outside the heat preservation layer. According to the utility model, through the arrangement of the first protective layer, the water resistance, corrosion resistance and weather resistance of the cable can be improved, the possibility that seawater immerses the cable is reduced, and through the arrangement of the thermal insulation layer, the influence of external environment temperature change on the use of the cable can be reduced.

Description

Technical Field

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

[0002] At present, offshore wind power is developing rapidly around the world. Statistics show that by the end of 2016, the global installed capacity of offshore wind power reached 14.384 million kilowatts. With the participation of countries such as China and the United States, the development speed of this industry is expected to accelerate further in the next few years. The 13th Five-Year Plan for Wind Power Development points out that by the end of 2020, the cumulative grid-connected installed capacity of wind power will be guaranteed to reach more than 210 million kilowatts, of which the grid-connected installed capacity of offshore wind power will reach more than 5 million kilowatts (the new capacity accounts for 57% of the national new capacity). The cumulative grid-connected installed capacity of wind power in 2015-2016 was 129 million kilowatts and 148 million kilowatts respectively. It is expected that the average annual growth rate of newly added grid-connected installed capacity during the 13th Five-Year Plan period will be at least about 9%-10%. This indicates that offshore wind power has a large market during the 13th Five-Year Plan period. Compared with the restricted onshore wind power, the installed capacity of offshore wind power has achieved a substantial increase since 2016. Last year, China's newly installed offshore wind power capacity was 0.59GW, a year-on-year increase of 64%. According to the preliminary results of the detailed investigation of wind energy resources by the China Meteorological Administration, the installed capacity of wind power in the offshore area within the water depth of 5 to 25 meters and the height range of 50 meters above sea level in my country is about 200 million kWh. At the same time, the areas where offshore wind power can be developed are mainly concentrated in the eastern coastal areas of my country. Vigorously developing offshore wind power can not only meet the electricity demand in the east, but also accelerate the pace of green power generation in my country by combining land and sea wind power.

[0003] Due to the long coastline of my country, the complex and diverse environment, and the complex and changeable climate, the temperature difference in the environment is large. The environment where wind power generation equipment is installed and used is relatively harsh, especially the cables used in offshore wind power generation systems. Now there is a need for a cable that is water-resistant, low-temperature-resistant, corrosion-resistant and weather-resistant to meet the needs of offshore wind power generation systems. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a cable for offshore wind power generation, which has water resistance, low temperature resistance, corrosion resistance and weather resistance to meet the needs of offshore wind power generation systems.

[0005] The utility model solves the above technical problems through the following technical means: a cable for offshore wind power generation, including a core, an insulating layer wrapped outside the core, a metal shielding layer arranged outside the insulating layer, a filling layer arranged between the metal shielding layer and the insulating layer, a thermal insulation layer wrapped outside the metal shielding layer, and a first protective layer wrapped outside the thermal insulation layer.

[0006] Furthermore, an inner lining layer is arranged between the metal shielding layer and the filling layer, and the inner lining layer is wrapped outside the filling layer, and the metal shielding layer is wrapped outside the inner lining layer.

[0007] Furthermore, the thermal insulation layer is made of polyurethane.

[0008] Furthermore, the metal shielding layer is a copper strip that is integrally welded and then corrugated.

[0009] Furthermore, it also includes a waterproof component, which is arranged outside the first protective layer and is used to prevent seawater from penetrating into the cable.

[0010] Furthermore, the waterproof component includes a water-blocking layer and a second protective layer, the water-blocking layer is wrapped outside the first protective layer, and the second protective layer is wrapped outside the water-blocking layer.

[0011] Furthermore, the water-blocking layer is formed by stacking several layers of water-blocking yarn.

[0012] Furthermore, the outer surface of the second protective layer is coated with antifreeze paint.

[0013] Beneficial effects of the utility model:

[0014] 1. By setting the first protective layer, the water resistance, corrosion resistance and weather resistance of the cable can be improved, and the possibility of seawater intrusion into the cable can be reduced. By setting the insulation layer, the impact of changes in external ambient temperature on the use of the cable can be reduced.

[0015] 2. The possibility of seawater intrusion into the cable can be further reduced by setting the second protective layer. When an unexpected situation causes the second protective layer to rupture, the seawater will contact the water-blocking yarn. The water-blocking yarn swells when it comes into contact with water, which can reduce the intrusion of seawater. The first protective layer can then block the seawater from entering the interior of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0017] Figure 1 This is a schematic diagram of the structure of a cable for offshore wind power generation according to the utility model;

[0018] in:

[0019] 1. Wire core; 2. Insulation layer; 3. Filling layer; 4. Lining layer; 5. Metal shielding layer; 6. Thermal insulation layer; 7. First protective layer; 8. Water-blocking layer; 9. Second protective layer. DETAILED DESCRIPTION

[0020] 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.

[0021] 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 the orientation or position relationship, they are based on the orientation or position relationship shown in the figure. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position 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 the specific circumstances. In the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0023] like Figure 1 As shown, the utility model is a cable for offshore wind power generation, including a core 1, an insulating layer 2 wrapped around the core 1, a metal shielding layer 5 is arranged outside the insulating layer 2, the metal shielding layer 5 is a copper strip that is corrugated after integral welding, a filling layer 3 is arranged between the metal shielding layer 5 and the insulating layer 2, an inner lining layer 4 is arranged between the metal shielding layer 5 and the filling layer 3, and the inner lining layer 4 is wrapped outside the filling layer 3, the metal shielding layer 5 is wrapped outside the inner lining layer 4, the metal shielding layer 5 is wrapped outside the thermal insulation layer 6, the thermal insulation layer 6 is composed of polyurethane, the thermal insulation layer 6 is wrapped outside the first protective layer 7, and a waterproof component is arranged outside the first protective layer.

[0024] like Figure 1As shown, the waterproof component is arranged outside the first protective layer 7, and the waterproof component includes a water-blocking layer 8 and a second protective layer 9. The water-blocking layer 8 is wrapped outside the first protective layer 7, and the second protective layer 9 is wrapped outside the water-blocking layer 8. The water-blocking layer 8 is composed of several layers of water-blocking yarn stacked together, and the outer surface of the second protective layer 9 is coated with antifreeze paint.

[0025] The operating principle of the utility model is as follows:

[0026] The antifreeze coating can reduce the impact of ambient temperature changes on the wire core 1, and the antifreeze coating also has the functions of waterproofing, corrosion resistance, moisture resistance, and crack resistance. The second protective layer 9 is made of EPDM rubber, which has excellent aging resistance, weather resistance, ozone resistance, sunlight resistance, heat resistance, water resistance, water vapor resistance, ultraviolet resistance, and radiation resistance.

[0027] When the second protective layer 9 is accidentally damaged, seawater will be absorbed by the water-blocking layer 8 when it penetrates the cable. The water-blocking layer 8 is composed of several layers of water-blocking yarns. After absorbing water, the water-blocking yarns can rapidly expand to form a large volume of gel. The gel has a strong water-retaining capacity and can effectively prevent the growth of water trees, thereby preventing water from continuing to penetrate and diffuse, achieving the purpose of water blocking, and the seawater in the water-blocking layer 8 will be blocked by the first protective layer 7. The material of the first protective layer 7 is polyethylene, which has good low-temperature resistance and good chemical stability, and is resistant to corrosion by acid, alkali, and salt aqueous solutions at room temperature.

[0028] The cable insulation layer 6 is made of polyurethane, which has excellent performance, good toughness, cold resistance (low temperature resistance), water resistance, aging resistance, acid and alkali resistance, weather resistance, long service life, and UV resistance, and is suitable for the environment of offshore wind power generation.

[0029] The filling layer 3 is made of glass fiber, which has the characteristics of insulation, low thermal conductivity, and corrosion resistance, and can effectively further reduce the impact of ambient temperature difference on the core 1. The mechanical strength and tensile strength of glass fiber are very good, which can effectively improve the mechanical strength and tensile strength of the cable and extend the service life of the cable. By setting the metal shielding layer 5, the impact of electromagnetic waves generated by the cable on surrounding electrical equipment can be reduced.

[0030] 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 cable for offshore wind power generation, characterized in that: It comprises a wire core, the wire core is wrapped with an insulating layer, a metal shielding layer is arranged outside the insulating layer, a filling layer is arranged between the metal shielding layer and the insulating layer, the metal shielding layer is wrapped with a heat preservation layer, and the heat preservation layer is wrapped with a first protective layer.

2. The offshore wind power generation cable according to claim 1, characterized in that: An inner lining layer is arranged between the metal shielding layer and the filling layer, and the inner lining layer is wrapped outside the filling layer, and the metal shielding layer is wrapped outside the inner lining layer.

3. The offshore wind power generation cable according to claim 1, characterized in that: The thermal insulation layer is made of polyurethane.

4. The offshore wind power generation cable according to claim 1, characterized in that: The metal shielding layer is a copper strip that is embossed after being integrally welded.

5. The offshore wind power generation cable according to claim 1, characterized in that: It also includes a waterproof component, which is arranged outside the first protective layer and is used to prevent seawater from penetrating into the cable.

6. The offshore wind power generation cable according to claim 5, characterized in that: The waterproof component comprises a water-blocking layer and a second protective layer, wherein the water-blocking layer is wrapped outside the first protective layer, and the second protective layer is wrapped outside the water-blocking layer.

7. The offshore wind power generation cable according to claim 6, characterized in that: The water-blocking layer is formed by stacking several layers of water-blocking yarn.

8. The offshore wind power generation cable according to claim 6, characterized in that: The outer surface of the second protective layer is coated with antifreeze paint.

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