Marine photovoltaic cable with steel-plastic comprehensive polyethylene sheath

Abstract

The utility model discloses an offshore photovoltaic cable with a steel-plastic comprehensive polyethylene sheath, which relates to the technical field of cable structures and comprises a sheath body and a protective layer, a first drawing wire is connected to the center of the protective layer, a second drawing wire is connected to the other side of the first drawing wire, an insulating layer is connected to the inner side of the protective layer, and the cable body is located on the inner side of a filling layer. An isolation block is arranged between the cable main bodies, the outer side of the isolation block is connected with a belting layer, the outer side of the belting layer is provided with a second expansion layer, and the outer side of the second expansion layer is provided with a first expansion layer. According to the utility model, the inner side of the steel-plastic sheath main body is coated with the polyethylene powder to achieve an anti-corrosion effect, and the inner side of the sheath main body is also provided with the protective layer which is formed by connecting the first drawing wires and the second drawing wires which are distributed in a crossed manner, so that the anti-pressure capability of the protective layer is stronger, and the service life of the protective layer is prolonged. And when the sheath main body is influenced, the protection blocks share the influence, so that the strength of the sheath main body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable structures, in particular to an offshore photovoltaic cable with a steel-plastic composite polyethylene sheath. Background Art

[0002] With the rise of renewable energy, offshore photovoltaic power generation, as an important clean energy technology, is mainly used in offshore photovoltaic power generation equipment. With the rise of offshore photovoltaic power generation technology, offshore photovoltaic construction has become a key link in achieving the clean energy goal. At present, most cables are commonly seen in conventional laying methods such as overhead and buried. However, in a harsh environment like the ocean, the performance requirements for cables have been significantly improved. Steel-plastic composite pipes are a newly developed type of pipeline material in China. This pipeline has successfully solved the losses caused by pipeline corrosion every year and is completely a green and energy-saving pipeline. This composite pipe is formed by combining steel and plastic, so it has the common advantages of steel and plastic. Its compressive, tensile, corrosion-resistant, and anti-ultraviolet capabilities are beyond those of other pipelines. Therefore, this pipeline can be used in various engineering fields, and the composite steel pipe can exhibit different performance advantages according to different environments.

[0003] The existing patent (Publication No.: CN220984208U) discloses a new type of offshore photovoltaic power generation cable, which has the advantages of relatively simple structure, excellent water-blocking, UV resistance, seawater and seabird excrement corrosion and aging resistance, convenient use for offshore laying, simple process, low cost, and high production quality. The standard rated temperature of this cable can reach -40 to 125 °C, the rated voltage can reach 1500 VDC, the finished cable can withstand an alternating current of 50 Hz, a test voltage of 6.5 kV, and the insulation will not break down within 5 minutes. The steel tape armored cable can be directly laid on the sea and can withstand a certain amount of mechanical pressure and other external forces (including harsh weather such as strong winds and rough waves at sea), and the safe service life of the product is ≥ 10 years. In the process of implementing this solution, it is found that the following problems exist in the existing technology and have not been well solved:

[0004] During the use of this cable, it is protected by the armored layer. However, once the cable is damaged, leakage is likely to occur, affecting the environment around the cable. Secondly, once the central conductor is affected during use, a chain reaction often occurs, causing other parts to also have problems and affecting the use. Content of the Utility Model

[0005] In order to improve the problem that the cable is prone to leakage when damaged and the central conductor is prone to chain reaction when broken as mentioned above, the utility model provides an offshore photovoltaic cable with a steel-plastic composite polyethylene sheath.

[0006] The utility model provides an offshore photovoltaic cable with a steel-plastic composite polyethylene sheath, adopting the following technical solutions:

[0007] An offshore photovoltaic cable with a steel-plastic composite polyethylene sheath comprises a sheath body and a cable body, wherein the sheath body is a steel-plastic composite pipe, a protective layer is arranged on the inner side of the sheath body, a first wire is connected to the center of the protective layer, a second wire is connected to the other side of the first wire, and an insulating layer is connected to the inner side of the protective layer;

[0008] The cable body is located inside the filling layer, an isolation block is arranged between the cable bodies, a wrapping layer is connected to the outside of the isolation block, a second expansion layer is arranged outside the wrapping layer, and a first expansion layer is arranged outside the second expansion layer.

[0009] Through the above technical scheme, it is convenient to improve the corrosion resistance and reduce the chance of breakage by setting a sheath body with steel-plastic polyethylene. At the same time, a staggered first expansion layer and a second expansion layer are set on the inner side of the insulating layer. The staggered distribution blocks the seawater and prevents it from invading the inside. Secondly, an isolation block is set in the center of the cable body to avoid cross influence.

[0010] Optionally, in the above-mentioned offshore photovoltaic cable with a steel-plastic composite polyethylene sheath, a protective layer is evenly and equidistantly distributed on the inner side of the sheath body, the protective layer and the insulating layer are installed in an integrated manner, and the inner wall of the sheath body is evenly coated with polyethylene powder.

[0011] Through the above technical solution, it is convenient to strengthen the strength of the sheath body through the protective layer, and secondly to improve the corrosion resistance through the polyethylene powder.

[0012] Optionally, in the above-mentioned offshore photovoltaic cable with a steel-plastic composite polyethylene sheath, the protective layer is evenly and equidistantly distributed into equal-sized blocks by a first drawing, the first drawing and the second drawing are in an alternating distribution structure, and the second drawing and the first drawing form a cross-shaped structure.

[0013] Through the above technical solution, the pressure on the sheath body can be evenly distributed through the cooperation of the first wire drawing and the second wire drawing, thereby improving the strength of the sheath body and preventing it from being damaged.

[0014] Optionally, in the above-mentioned offshore photovoltaic cable with a steel-plastic composite polyethylene sheath, the first expansion layer is evenly and equidistantly distributed on the inner side of the insulating layer, the center of the first expansion layer and the edge of the second expansion layer are above the same horizontal line, and the second expansion layer is evenly and equidistantly distributed on the outer side of the wrapping layer.

[0015] Through the above technical solution, the first expansion layer cooperates with the second expansion layer to block the seawater, preventing the seawater from further invading the interior and affecting the cable body.

[0016] Optionally, in the above-mentioned marine photovoltaic cable with a steel-plastic composite polyethylene sheath, a filling layer is evenly and equidistantly distributed inside the tape layer. The filling layer is integrally installed with the cable body, and the cable body is composed of a central conductor and a covering layer outside it.

[0017] Through the above technical solution, it is convenient to protect the cable body through the filling layer and prevent the cable body from displacing during use.

[0018] Optionally, in the above-mentioned marine photovoltaic cable with a steel-plastic composite polyethylene sheath, the isolation blocks are evenly and equidistantly distributed inside the tape layer. The center of the isolation block coincides with the center of the tape layer, and the number of isolation blocks is the same as the number of cable bodies.

[0019] Through the above technical solution, it is convenient to isolate different cable bodies through the isolation blocks, prevent them from affecting each other when damaged, and protect the cable bodies.

[0020] In summary, the present utility model has at least one of the following beneficial effects:

[0021] By coating polyethylene powder on the inner side of the steel-plastic sheath body, the anti-corrosion effect is achieved. Moreover, a protective layer is also provided on the inner side of the sheath body. The protective layer is connected by the first wire drawing and the second wire drawing distributed in a crosswise manner, making the compressive capacity of the protective layer relatively strong. When the sheath body is affected, the protective blocks share the force, improving the strength of the sheath body;

[0022] By providing isolation blocks between the cable bodies, the cable bodies do not affect each other, avoiding the same damage when there is a damaged port. Secondly, a first expansion layer and a second expansion layer are alternately arranged on the outer side of the cable body. When there is a breakage, it adsorbs seawater and expands to seal the broken part, avoiding electric leakage and protecting the cable body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the overall front view structural schematic diagram of the present utility model;

[0024] Figure 2 is the front view structural schematic diagram of the first wire drawing of the present utility model;

[0025] Figure 3 is the side view structural schematic diagram of the first wire drawing of the present utility model;

[0026] Figure 4 is the side view structural schematic diagram of the first expansion layer of the present utility model.

[0027] In the figure: 1. Sheath main body; 2. Protective layer; 3. Insulating layer; 4. First expansion layer; 5. Second expansion layer; 6. Cable main body; 7. Tape layer; 8. Isolation block; 9. Filling layer; 10. First wire drawing; 11. Second wire drawing. Detailed implementation mode

[0028] The following is further described in detail in conjunction with the attached Figures 1-4 This utility model.

[0029] Please refer to the attached drawings in the specification Figures 1-4 An embodiment provided by this utility model: A marine photovoltaic cable with a steel-plastic composite polyethylene sheath, including a sheath main body 1 and a cable main body 6. The sheath main body 1 is a steel-plastic composite pipe. A protective layer 2 is arranged inside the sheath main body 1 to strengthen the strength of the sheath main body 1 and prevent it from being damaged. A first wire drawing 10 is connected to the center of the protective layer 2, and the other side of the first wire drawing 10 is connected to a second wire drawing 11. By cooperating with the first wire drawing 10 and the second wire drawing 11, the pressure of the sheath main body 1 is evenly distributed to improve the strength. The inner side of the protective layer 2 is connected to an insulating layer 3;

[0030] The cable main body 6 is located inside the filling layer 9. Isolation blocks 8 are arranged between the cable main bodies 6 to avoid mutual influence between the cable main bodies 6 and improve safety. A tape layer 7 is connected to the outside of the isolation block 8. A second expansion layer 5 is arranged outside the tape layer 7. By cooperating with the second expansion layer 5 and the first expansion layer 4, it is prevented that seawater affects the inside. A first expansion layer 4 is arranged outside the second expansion layer 5.

[0031] Referring to the attached drawings in the specification Figures 1-4 The protective layers 2 are evenly and equidistantly distributed inside the sheath main body 1. The protective layer 2 and the insulating layer 3 are integrally installed. The inner wall of the sheath main body 1 is evenly coated with polyethylene powder. The strength of the sheath main body 1 is strengthened by the protective layer 2, and secondly, the corrosion resistance is improved by the polyethylene powder.

[0032] Referring to the attached drawings in the specification Figures 1-4 The protective layer 2 is evenly and equidistantly divided into equal-sized blocks by the first wire drawing 10. The first wire drawing 10 and the second wire drawing 11 are arranged in a staggered distribution structure. The second wire drawing 11 and the first wire drawing 10 form a cross-shaped structure. By cooperating with the first wire drawing 10 and the second wire drawing 11, the pressure of the sheath main body 1 is evenly distributed to improve the strength of the sheath main body 1 and prevent it from being damaged.

[0033] Referring to the attached drawings in the specification Figures 1-4The first expansion layer 4 is evenly and equidistantly distributed on the inner side of the insulating layer 3, the center of the first expansion layer 4 and the edge of the second expansion layer 5 are above the same horizontal line, and the second expansion layer 5 is evenly and equidistantly distributed on the outer side of the tape layer 7. The first expansion layer 4 cooperates with the second expansion layer 5 to block seawater and prevent it from continuing to invade the interior and affecting the cable body 6.

[0034] See the attached drawings in the specification Figures 1-4 The filling layer 9 is evenly and equidistantly distributed on the inner side of the tape layer 7. The filling layer 9 is integrated with the cable body 6. The cable body 6 is composed of a central conductor and a covering layer on its outer side. The filling layer 9 protects the cable body 6 to prevent displacement during use.

[0035] See the attached drawings in the specification Figures 1-4 The isolation blocks 8 are evenly and equidistantly distributed on the inner side of the tape layer 7. The center of the isolation block 8 coincides with the center of the tape layer 7. The number of the isolation blocks 8 is consistent with the number of the cable bodies 6. The isolation blocks 8 are used to isolate different cable bodies 6 to prevent them from affecting each other when damaged, thereby protecting the cable bodies 6.

[0036] Working principle: When in use, first, the sheath body 1 is exposed to the outside world during use. When it encounters unexpected factors such as bumps and collisions, the sheath body 1 will be deformed, thereby squeezing the protective layer 2. The first wire drawing 10 and the second wire drawing 11 in the protective layer 2 are staggered inside it, thereby evenly distributing the pressure, increasing the compression resistance of the sheath body 1, and ensuring the long-term use of the sheath body 1;

[0037] As mentioned above, when the sheath body 1 is damaged, seawater enters the interior thereof, and then contacts the first expansion layer 4 and the second expansion layer 5. After encountering the seawater, the seawater is adsorbed and expands at the same time, so that the gaps are sealed for emergency buffering to prevent the cracks from expanding. Similarly, when the seawater enters the filling layer 9, due to the obstruction of the isolation block 8, the seawater can only affect the cable body 6 at the crack, and will not affect the cable bodies 6 on the other two sides.

[0038] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An offshore photovoltaic cable with a steel-plastic composite polyethylene sheath, comprising a sheath main body (1) and a cable main body (6), wherein the sheath main body (1) is a steel-plastic composite pipe, and is characterized in that: A protective layer (2) is provided on the inner side of the sheath body (1). A first wire (10) is connected to the center of the protective layer (2). The other side of the first wire (10) is connected to a second wire (11). An insulating layer (3) is connected to the inner side of the protective layer (2). The cable body (6) is located inside the filling layer (9). Isolation blocks (8) are provided between the cable bodies (6). A tape layer (7) is connected to the outside of the isolation blocks (8). A second expansion layer (5) is provided on the outside of the tape layer (7). A first expansion layer (4) is provided on the outside of the second expansion layer (5).

2. The offshore photovoltaic cable with a steel-plastic composite polyethylene sheath according to claim 1, characterized in that: The protective layers (2) are evenly and equidistantly distributed on the inner side of the sheath body (1). The protective layer (2) and the insulating layer (3) are integrally installed. The inner wall of the sheath body (1) is evenly coated with polyethylene powder.

3. The offshore photovoltaic cable with a steel-plastic composite polyethylene sheath according to claim 1, characterized in that: The protective layer (2) is evenly and equidistantly divided into equal-sized blocks by the first wire (10). The first wire (10) and the second wire (11) are arranged in a staggered structure. The second wire (11) and the first wire (10) form a cross-shaped structure.

4. A marine photovoltaic cable with a steel-plastic composite polyethylene sheath according to claim 1, characterized in that: The first expansion layer (4) is evenly and equidistantly distributed inside the insulating layer (3). The center of the first expansion layer (4) and the edge of the second expansion layer (5) are on the same horizontal line above. The second expansion layer (5) is evenly and equidistantly distributed on the outside of the tape layer (7).

5. The offshore photovoltaic cable with a steel-plastic composite polyethylene sheath according to claim 1, characterized in that: The filling layer (9) is evenly and equidistantly distributed inside the tape layer (7). The filling layer (9) and the cable body (6) are integrally installed. The cable body (6) is composed of a central conductor and a covering layer on its outside.

6. The marine photovoltaic cable with a steel-plastic composite polyethylene sheath according to claim 1, characterized in that: The isolation blocks (8) are evenly and equidistantly distributed inside the tape layer (7). The center of the isolation block (8) coincides with the center of the tape layer (7). The number of isolation blocks (8) is the same as the number of cable bodies (6).

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