Copper conductor for deep sea flexible direct current power transmission system
By adding tin plating, filling, shielding, water blocking, and sheathing layers to the copper conductors of the deep-sea flexible DC transmission system, the corrosion and mechanical fatigue problems of traditional copper conductors in the deep-sea environment are solved, the electromagnetic shielding performance is enhanced, the service life is extended, and the signal stability is maintained.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-03-24
AI Technical Summary
In deep-sea environments, traditional seabed copper conductors suffer from accelerated corrosion, mechanical fatigue, and electromagnetic interference under conditions of high salinity, high pressure, dynamic bending, and electromagnetic interference, resulting in short service life and signal distortion.
The copper conductor, made using Niehoff electroplating technology, has an outer tin plating layer, a filler layer, a double shielding layer, a water-blocking layer, and a sheath layer, which are respectively composed of silver-plated copper braided mesh, carbon nanotube modified polyethylene, and ultra-high molecular weight polyethylene, enhancing mechanical strength and electromagnetic shielding performance.
It improves the tensile strength and salt spray aging resistance of copper conductors, maintains 90% performance stability, achieves a shielding effectiveness of 80dB, effectively suppresses high-frequency harmonic interference, prevents seawater penetration, and extends service life.
Smart Images
Figure CN224036106U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of copper conductor technology, specifically a copper conductor for a deep-sea flexible DC transmission system. Background Technology
[0002] The deep-sea environment presents harsh service conditions: seawater salinity is as high as 3.5% NaCl, pH value is 7.5-8.4, the average annual temperature of the fully immersed area is 4-12℃, and the hydrostatic pressure in the deep sea reaches over 20MPa; at the same time, it is affected by tides, ocean currents, and typhoon waves, and the submarine copper conductor must withstand periodic bending and impact loads. Traditional submarine copper conductors have significant defects in this environment:
[0003] Accelerated corrosion: The penetration of chloride ions in seawater leads to an annual corrosion rate of 5-8 μm, and the copper core will oxidize and fail after 10-15 years.
[0004] Mechanical fatigue: Dynamic bending stress concentration reduces fatigue life to only 3×10 5 Second-rate;
[0005] Electromagnetic interference: High-frequency harmonics in flexible DC systems penetrate single-layer shielding, causing signal distortion;
[0006] To address these issues, we propose a copper conductor for a deep-sea flexible DC transmission system. Utility Model Content
[0007] To address the shortcomings of existing technologies, this invention provides a copper conductor for a deep-sea flexible DC transmission system, solving the problems mentioned in the background section.
[0008] To achieve the above objectives, this utility model provides the following technical solution: a copper conductor for a deep-sea flexible DC transmission system, comprising six copper conductors, five of which are evenly distributed on the outer side of the central copper conductor. The copper conductors are manufactured using the Niehoff electroplating process, and the conductor wires, drawn by a Niehoff multi-head wire drawing machine, have a diameter of 0.850±0.004mm, an elongation ≥30%, and a resistivity ≤0.01720Ω·mm. 2 / m, a tin-plated layer is fixedly provided on the outside of the copper conductor, a filling layer is fixedly provided on the outside of the tin-plated layer, a shielding layer is fixedly provided on the outside of the filling layer, a water-blocking layer is fixedly provided on the outside of the shielding layer, and a sheathing layer is fixedly provided on the outside of the water-blocking layer.
[0009] Preferably, the shielding layer adopts a double-layer design, with the inner layer being 0.05mm aluminum foil and the outer layer being silver-plated copper woven mesh.
[0010] Preferably, the water-blocking layer adopts a carbon nanotube modified polyethylene structure.
[0011] Preferably, the sheath layer is made of ultra-high molecular weight polyethylene.
[0012] This utility model provides a copper conductor for a deep-sea flexible DC transmission system, which has the following advantages:
[0013] By setting a sheath layer, the overall tensile strength is ≥30MPa, and the performance retention rate is ≥90% after 1000 hours of salt spray aging. By setting a shielding layer, the shielding effectiveness of the double-layer shield against 1GHz interference is ≥80dB, which meets the high-frequency harmonic suppression requirements of flexible DC systems. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0015] In the diagram: 1. Copper conductor; 2. Tin plating layer; 3. Filler layer; 4. Shielding layer; 5. Water-blocking layer; 6. Sheath layer. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] Example
[0018] like Figure 1 As shown, this utility model provides a technical solution: a copper conductor for a deep-sea flexible DC transmission system, comprising six copper conductors 1, five of which are evenly distributed on the outer side of the central copper conductor 1. The copper conductors 1 are manufactured using the Niehoff electroplating process, and the conductor single wire diameter is 0.850±0.004mm, elongation ≥30%, and resistivity ≤0.01720Ω·mm using a Niehoff multi-head wire drawing machine. 2 / m, a tin-plated layer 2 is fixedly provided on the outside of the copper conductor 1, a filling layer 3 is fixedly provided on the outside of the tin-plated layer 2, and a shielding layer 4 is fixedly provided on the outside of the filling layer 3. The shielding layer 4 adopts a double-layer design, with an inner layer of 0.05mm aluminum foil and an outer layer of silver-plated copper braided mesh. A water-blocking layer 5 is fixedly provided on the outside of the shielding layer 4. The water-blocking layer 22 adopts a carbon nanotube modified polyethylene structure. A sheath layer 6 is fixedly provided on the outside of the water-blocking layer 5. The sheath layer 23 adopts an ultra-high molecular weight polyethylene structure, which can effectively improve the tensile strength of the copper conductor.
[0019] In summary, by setting a sheath layer, the overall tensile strength is ≥30MPa, and the performance retention rate is ≥90% after 1000 hours of salt spray aging. By setting a shielding layer, the double-layer shielding has a shielding effectiveness of ≥80dB against 1GHz interference, meeting the high-frequency harmonic suppression requirements of flexible DC systems. By setting a water-blocking layer, carbon nanotube modified polyethylene with a volume resistivity ≤100Ω·m and a water absorption rate ≤0.1% prevents seawater from penetrating along the conductor longitudinally, further protecting the service life of the copper conductor.
[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A copper conductor for a deep-sea flexible DC transmission system, comprising a copper conductor, characterized in that: The number of copper conductors (1) is six, with five copper conductors (1) evenly distributed on the outer side of the central copper conductor (1). The copper conductors (1) are made using the Niehoff electroplating process, and the conductor single wire diameter is 0.850±0.004mm, elongation ≥30%, and resistivity ≤0.01720Ω·mm after being drawn by a Niehoff multi-head wire drawing machine. 2 / m, a tin-plated layer (2) is fixedly provided on the outside of the copper conductor (1), a filling layer (3) is fixedly provided on the outside of the tin-plated layer (2), a shielding layer (4) is fixedly provided on the outside of the filling layer (3), a water-blocking layer (5) is fixedly provided on the outside of the shielding layer (4), and a sheath layer (6) is fixedly provided on the outside of the water-blocking layer (5).
2. The copper conductor for a deep-sea flexible DC transmission system according to claim 1, characterized in that: The shielding layer (4) adopts a double-layer design, with the inner layer being 0.05mm aluminum foil and the outer layer being silver-plated copper woven mesh.
3. The copper conductor for a deep-sea flexible DC transmission system according to claim 1, characterized in that: The water-blocking layer (5) adopts a carbon nanotube modified polyethylene structure.
4. The copper conductor for a deep-sea flexible DC transmission system according to claim 1, characterized in that: The sheath layer (6) is made of ultra-high molecular weight polyethylene.