Special acid and alkali resistant cable for sea surface photovoltaic panel connection

Abstract

The utility model discloses a special acid and alkali resistant cable for sea surface photovoltaic panel connection, and relates to the technical field of cables. The cable comprises a cable core, the surface of the cable core is coated with an inner protection layer, the surface of the inner protection layer is coated with a reinforcing layer, the surface of the reinforcing layer is coated with an outer protection layer, the inner protection layer comprises an insulating layer, the surface of the insulating layer is coated with a heat insulation layer, and the surface of the heat insulation layer is coated with a flame-retardant layer. According to the utility model, through the innovative multi-layer composite structure design, the technical problem that acid and alkali resistance, aging resistance and mechanical strength of a traditional single-sheath cable in a marine environment are difficult to consider at the same time is successfully solved; wherein the copper core and the acid and alkali resistant alloy wire stranded cable core keep high conductivity and realize long-time salt mist corrosion resistance, the double-layer outer protective layer of the fluorobutyl rubber and the ETFE breaks through the limitation of traditional materials, and full acid and alkali environment protection of pH 1-14 and tensile strength retention rate after long-time QUV aging are realized.

Description

Technical Field

[0001] This utility model belongs to the field of cable technology, and in particular relates to a special acid and alkali resistant cable for connecting marine photovoltaic panels. Background Technology

[0002] Cables are made of one or more insulated conductors and an outer insulating protective layer, used to transmit electricity or information from one place to another. They consist of single or multiple strands of wire and an insulating layer, and are used to connect circuits, electrical appliances, etc.

[0003] With the continuous development of offshore photovoltaic power generation technology, higher requirements are being placed on the cables connecting the photovoltaic panels. The marine environment is characterized by high humidity and strong acid and alkali corrosion, making ordinary cables susceptible to damage, leading to performance degradation or even failure. Current cables typically use a single outer sheath material, a design with the following technical problems: the outer sheath cannot simultaneously meet the requirements for acid and alkali resistance, tensile strength, and aging resistance; chemical reactions in strong acid and alkali environments can easily cause damage to the outer sheath; and the internal conductors and insulation layers are exposed to the external environment, making them vulnerable to corrosion and mechanical damage, thus affecting the normal use and service life of the cable, increasing maintenance costs, and creating safety hazards.

[0004] To address these issues, we provide a dedicated acid and alkali resistant cable for connecting marine photovoltaic panels. Utility Model Content

[0005] The purpose of this utility model is to provide a special acid and alkali resistant cable for connecting marine photovoltaic panels. By combining the outer sheath, the reinforcing layer and the inner sheath, it solves the problem that the existing cable uses a single outer sheath material, which makes it difficult to meet the requirements of acid and alkali resistance, tensile strength and aging resistance at the same time.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a special acid and alkali resistant cable for connecting marine photovoltaic panels, comprising a cable core, an inner sheath covering the surface of the cable core, a reinforcing layer covering the surface of the inner sheath, an outer sheath covering the surface of the reinforcing layer, an insulation layer covering the surface of the inner sheath, a heat insulation layer covering the surface of the insulation layer, a flame retardant layer covering the surface of the heat insulation layer, an anti-torsion layer covering the surface of the reinforcing layer, a high-strength layer covering the surface of the anti-torsion layer, and a puncture-resistant layer covering the surface of the puncture-resistant layer, a first acid and alkali resistant layer covering the surface of the first acid and alkali resistant layer, and a second acid and alkali resistant layer covering the surface of the first acid and alkali resistant layer.

[0008] The present invention is further configured such that the cable core includes a copper core and acid and alkali resistant alloy wires. The copper core and the acid and alkali resistant alloy wires are made into a cable core by a stranding process. The cable core adopts a stranding process of copper core and acid and alkali resistant alloy wires. On the basis of ensuring the excellent conductivity of copper core, the alloy wires enhance the resistance of cable core 1 to seawater and acid and alkali corrosion. At the same time, the stranding structure gives the cable core good flexibility and tensile strength, meeting the dynamic stress requirements in the marine environment.

[0009] The present invention is further configured such that the insulating layer is made of fluororubber, and the surface of the fluororubber is coated with a layer of polytetrafluoroethylene. The insulating layer is made of fluororubber material and coated with polytetrafluoroethylene. The wide temperature range characteristics of fluororubber and the chemical inertness of polytetrafluoroethylene combine to form a dual protection system, which can effectively resist strong acid and alkali, organic solvent corrosion and ultraviolet aging. At the same time, the coating reduces the friction coefficient during cable laying and extends the service life.

[0010] The present invention is further configured such that the heat insulation layer is made of glass fiber, and the flame retardant layer is filled with magnesium hydroxide between the heat insulation layer and the anti-torsion layer. The heat insulation layer is made of glass fiber material, whose low thermal conductivity effectively blocks external heat conduction; the flame retardant layer is filled with magnesium hydroxide, which decomposes and absorbs heat at high temperatures and inhibits combustion, achieving the UL94V-0 flame retardant standard, and the halogen-free formula avoids the release of toxic gases, taking into account both fire safety and environmental protection requirements.

[0011] The present invention is further configured such that the anti-torsion layer is made of high-strength nylon, and the high-strength layer is made of spiral steel strip armor. The anti-torsion layer is made of high-strength nylon material, which provides excellent resistance to torsional deformation; the spiral steel strip armor structure gives the cable radial compressive strength and impact resistance. The dual structure design significantly improves the mechanical reliability of the cable in complex marine environments.

[0012] The present invention is further configured such that the puncture-resistant layer is made of a metal mesh, and the metal mesh is woven from tin-plated aluminum wire and steel wire. The puncture-resistant layer is composed of a metal mesh woven from tin-plated aluminum wire and steel wire. The metal weaving structure provides puncture resistance, and the tin plating treatment delays the oxidation of aluminum wire to adapt to the salt spray environment. At the same time, the metal layer forms an electromagnetic shielding layer to reduce the impact of external electromagnetic interference on signal transmission.

[0013] The present invention is further configured such that the first acid and alkali resistant layer is made of fluoroprene rubber and the second acid and alkali resistant layer is made of ETFE, forming a double-layer acid and alkali resistant structure composed of fluoroprene rubber and ETFE. The fluoroprene rubber resists oil, ozone erosion and low temperature environment, while the ETFE layer is resistant to strong acid and alkali corrosion and has a UV aging resistance of more than 25 years. Combined with the high temperature resistance of 150℃, a long-term protection system covering the entire temperature range is formed.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model, through an innovative multi-layer composite structure design, successfully solves the technical problem of traditional single-sheathed cables being unable to simultaneously achieve acid and alkali resistance, aging resistance, and mechanical strength in marine environments. It adopts a four-element protection system consisting of a cable core, inner sheath, reinforcing layer, and outer sheath. The copper core and acid and alkali resistant alloy wire stranded together maintain high conductivity while achieving long-term salt spray corrosion resistance. The double-layer outer sheath of fluoroprene rubber and ETFE breaks through the limitations of traditional materials, achieving protection in all acid and alkali environments from pH 1 to 14 and retaining tensile strength after long-term QUV aging. The spiral steel tape armor and metal braided mesh form a mechanical protection matrix. Combined with the glass fiber heat insulation layer and magnesium hydroxide flame retardant layer, it ensures insulation resistance retention within a wide temperature range of -50℃ to 150℃. The tin-plated aluminum wire and steel wire braided layer combine protection and electromagnetic shielding effectiveness.

[0016] 2. The cable core of this utility model adopts a copper core and acid and alkali resistant alloy wire stranding process. While ensuring the excellent conductivity of the copper core, the alloy wire enhances the cable core's resistance to seawater and acid / alkali corrosion. Simultaneously, the stranding structure gives the cable core good flexibility and tensile strength, meeting the dynamic stress requirements of marine environments. The insulation layer uses fluororubber material with a polytetrafluoroethylene coating. The wide temperature range characteristics of fluororubber combined with the chemical inertness of polytetrafluoroethylene form a dual protection system, effectively resisting strong acids and alkalis, organic solvent corrosion, and ultraviolet aging. The coating also reduces the friction coefficient during cable laying, extending service life. The heat insulation layer uses glass fiber material, whose low thermal conductivity effectively blocks external heat conduction. The flame-retardant layer is filled with magnesium hydroxide, which decomposes and absorbs heat at high temperatures, inhibiting combustion and achieving the UL94V-0 flame-retardant standard. Furthermore, the halogen-free formula avoids the presence of... To prevent the release of toxic gases, and to balance fire safety and environmental protection requirements, the anti-torsion layer uses high-strength nylon material, providing excellent resistance to torsional deformation. The spiral steel tape armor structure gives the cable radial compressive strength and impact resistance. The dual-structure design significantly improves the mechanical reliability of the cable in complex marine environments. The puncture-resistant layer is composed of a metal mesh woven from tin-plated aluminum wire and steel wire. The metal braid structure provides puncture resistance, and the tin plating delays the oxidation of the aluminum wire to adapt to salt spray environments. At the same time, the metal layer forms an electromagnetic shielding layer, reducing the impact of external electromagnetic interference on signal transmission. The cable adopts a double-layer acid and alkali resistant structure composed of fluoroprene rubber and ETFE. The fluoroprene rubber resists oil, ozone corrosion and low-temperature environments, while the ETFE layer is resistant to strong acid and alkali corrosion and has a UV aging resistance of more than 25 years. Combined with high temperature resistance of 150℃, a long-term protection system covering the entire temperature range is formed. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1This is a three-dimensional diagram of a special acid and alkali resistant cable for connecting marine photovoltaic panels.

[0019] Figure 2 This is an exploded schematic diagram of a special acid and alkali resistant cable for connecting marine photovoltaic panels.

[0020] Figure 3 This is a three-dimensional schematic diagram of the inner sheath of a special acid and alkali resistant cable for connecting marine photovoltaic panels.

[0021] Figure 4 This is a three-dimensional schematic diagram of the reinforcing layer in a special acid and alkali resistant cable for connecting marine photovoltaic panels.

[0022] Figure 5 This is a three-dimensional schematic diagram of the outer sheath of a special acid and alkali resistant cable for connecting marine photovoltaic panels.

[0023] In the attached diagram: 1. Cable core; 2. Inner sheath; 21. Insulation layer; 22. Heat insulation layer; 23. Flame retardant layer; 3. Reinforcing layer; 31. Torsion-resistant layer; 32. High-strength layer; 4. Outer sheath; 41. Puncture-resistant layer; 42. First acid and alkali resistant layer; 43. Second acid and alkali resistant layer. Detailed Implementation

[0024] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1

[0026] Please see Figure 1-5 This utility model is a special acid and alkali resistant cable for connecting marine photovoltaic panels, including a cable core 1, the surface of the cable core 1 is covered with an inner sheath 2, the surface of the inner sheath 2 is covered with a reinforcing layer 3, the surface of the reinforcing layer 3 is covered with an outer sheath 4, the inner sheath 2 includes an insulation layer 21, the surface of the insulation layer 21 is covered with a heat insulation layer 22, the surface of the heat insulation layer 22 is covered with a flame retardant layer 23, the reinforcing layer 3 includes an anti-torsion layer 31, the surface of the anti-torsion layer 31 is covered with a high-strength layer 32, the outer sheath 4 includes a puncture-resistant layer 41, the surface of the puncture-resistant layer 41 is covered with a first acid and alkali resistant layer 42, and the surface of the first acid and alkali resistant layer 42 is covered with a second acid and alkali resistant layer 43.

[0027] Specifically: The insulation layer 21 is formed by extrusion of fluororubber with a Shore hardness of 80A. Its surface is coated with a polytetrafluoroethylene coating with a thickness of 5-10μm by electrostatic spraying. The single filament diameter of the glass fiber is 9-13μm. The magnesium hydroxide filling the space between the heat insulation layer 22 and the anti-torsion layer 31 has a particle size of ≤10μm. The tensile strength of the high-strength nylon in the anti-torsion layer 31 is ≥280MPa. The puncture-resistant layer 41 has a tin-plated aluminum wire diameter of 0.3mm and a high-strength steel wire diameter of 0.5mm, which are woven in a 2:1 ratio with a weaving density of ≥85%. The second acid and alkali resistant layer 43 is formed by co-extrusion of ETFE and its thickness is 30-40% of the total thickness of the outer sheath 4.

[0028] Example 2

[0029] Please see Figure 1-5 Based on Example 1, the cable core 1 includes a copper core and acid and alkali resistant alloy wires. The copper core and acid and alkali resistant alloy wires are stranded to form the cable core 1. The insulation layer 21 is made of fluororubber, and the surface of the fluororubber is coated with a layer of polytetrafluoroethylene. The heat insulation layer 22 is made of glass fiber. The flame retardant layer 23 is filled with magnesium hydroxide between the heat insulation layer 22 and the anti-torsion layer 31. The anti-torsion layer 31 is made of high-strength nylon. The high-strength layer 32 is made of spiral steel tape armor. The puncture-resistant layer 41 is made of metal mesh, and the metal mesh is woven from tin-plated aluminum wire and steel wire. The first acid and alkali resistant layer 42 is made of fluoroprene rubber, and the second acid and alkali resistant layer 43 is made of ETFE.

[0030] Specifically: Cable core 1 uses a copper core and acid- and alkali-resistant alloy wire stranding process. While ensuring the excellent conductivity of the copper core, the alloy wire enhances the cable core 1's resistance to seawater and acid / alkali corrosion. Simultaneously, the stranding structure gives cable core 1 good flexibility and tensile strength, meeting the dynamic stress requirements of marine environments. Insulation layer 21 uses fluororubber material with a polytetrafluoroethylene coating. The wide temperature range characteristics of fluororubber combined with the chemical inertness of polytetrafluoroethylene form a dual protection system, effectively resisting strong acids and alkalis, organic solvent corrosion, and UV aging. The coating also reduces the coefficient of friction during cable laying, extending service life. Heat insulation layer 22 uses glass fiber material, whose low thermal conductivity effectively blocks external heat conduction. Flame retardant layer 23 is filled with magnesium hydroxide, which decomposes and absorbs heat at high temperatures, inhibiting combustion and achieving the UL94V-0 flame retardant standard. Furthermore, the halogen-free formula avoids... To prevent the release of toxic gases, and to balance fire safety and environmental protection requirements, the anti-torsion layer 31 is made of high-strength nylon material, providing excellent resistance to torsional deformation. The spiral steel tape armor structure gives the cable radial compressive strength and impact resistance. The dual structure design significantly improves the mechanical reliability of the cable in complex marine environments. The puncture-resistant layer 41 is composed of a metal mesh woven from tin-plated aluminum wire and steel wire. The metal braid structure provides puncture resistance, and the tin plating treatment delays the oxidation of the aluminum wire to adapt to salt spray environments. At the same time, the metal layer forms an electromagnetic shielding layer to reduce the impact of external electromagnetic interference on signal transmission. The double-layer acid and alkali resistant structure is composed of fluoroprene rubber and ETFE. Fluoroprene rubber resists oil, ozone corrosion and low-temperature environments, while the ETFE layer is resistant to strong acid and alkali corrosion and has a UV aging resistance of more than 25 years. Combined with high temperature resistance of 150℃, a long-term protection system covering the entire temperature range is formed.

[0031] The working principle of this utility model is as follows: by adopting a four-element protection system consisting of cable core 1, inner sheath 2, reinforcing layer 3, and outer sheath 4, the copper core and acid and alkali resistant alloy wire stranded cable core 1 maintains high conductivity while achieving long-term salt spray corrosion resistance. The fluoroprene rubber and ETFE double-layer outer sheath 4 breaks through the limitations of traditional materials, achieving protection in a full range of acid and alkali environments (pH 1-14) and retaining tensile strength after long-term QUV aging. The spiral steel strip armor and metal braided mesh form a mechanical protection matrix. Combined with the glass fiber heat insulation layer 22 and the magnesium hydroxide flame retardant layer 23, the insulation resistance is maintained within a wide temperature range of -50℃ to 150℃. The tin-plated aluminum wire and steel wire braided layer take into account both protection and electromagnetic shielding effectiveness.

[0032] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A special acid and alkali resistant cable for connecting photovoltaic panels on the sea surface, comprising a cable core (1), characterized in that: The surface of the cable core (1) is coated with an inner protective layer (2), the surface of the inner protective layer (2) is coated with a reinforcing layer (3), and the surface of the reinforcing layer (3) is coated with an outer protective layer (4); The inner protective layer (2) comprises an insulating layer (21), the surface of the insulating layer (21) is coated with a heat insulation layer (22), and the surface of the heat insulation layer (22) is coated with a flame-retardant layer (23); The reinforcing layer (3) comprises a torsion-resistant layer (31), and the surface of the torsion-resistant layer (31) is coated with a high-strength layer (32); The outer protective layer (4) comprises a puncture-resistant layer (41), the surface of the puncture-resistant layer (41) is coated with a first acid and alkali-resistant layer (42), and the surface of the first acid and alkali-resistant layer (42) is coated with a second acid and alkali-resistant layer (43).

2. The acid and alkali resistant cable for connecting photovoltaic panels on sea surface according to claim 1, characterized in that: The cable core (1) comprises a copper core and an acid and alkali-resistant alloy wire, and the copper core and the acid and alkali-resistant alloy wire are twisted into the cable core (1) by a twisting process.

3. The acid and alkali resistant cable for connecting photovoltaic panels on sea surface according to claim 1, characterized in that: The insulating layer (21) is made of fluororubber, and the surface of the fluororubber is coated with a polytetrafluoroethylene coating.

4. The acid and alkali resistant cable for connecting photovoltaic panels on sea surface according to claim 1, characterized in that: The heat insulation layer (22) is made of glass fiber, and the flame-retardant layer (23) is filled with magnesium hydroxide between the heat insulation layer (22) and the torsion-resistant layer (31).

5. The acid and alkali resistant cable for connecting photovoltaic panels on sea surface according to claim 1, characterized in that: The torsion-resistant layer (31) is made of high-strength nylon, and the high-strength layer (32) is made of spiral steel belt armor.

6. The acid and alkali resistant cable for connecting photovoltaic panels on sea surface according to claim 1, characterized in that: The puncture-resistant layer (41) is made of a metal mesh, and the metal mesh is woven with tinned aluminum wire and steel wire.

7. The acid and alkali resistant cable for connecting photovoltaic panels on the sea surface according to claim 1, characterized in that: The first acid and alkali-resistant layer (42) is made of fluoro-butyl rubber, and the second acid and alkali-resistant layer (43) is made of ETFE.

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