Moistureproof photovoltaic cable structure

Abstract

The utility model discloses a moisture-proof photovoltaic cable structure which comprises a conductor, an aluminum foil shielding layer is arranged on the outer wall of the conductor, an inner layer moisture-proof mechanism is arranged between the conductor and the aluminum foil shielding layer, and a crosslinked polyethylene inner sheath is arranged on the outer wall of the aluminum foil shielding layer. A middle reinforcing structure is arranged between the aluminum foil shielding layer and the cross-linked polyethylene inner sheath, and an outer layer protection structure is arranged on the outer wall of the cross-linked polyethylene inner sheath. According to the utility model, the inner-layer moisture-proof mechanism is used for isolating moisture from the conductor through the conductor insulating layer, the moisture-absorption expansion belt expands after encountering water, gaps are filled to block moisture diffusion, and the aluminum foil shielding layer forms a physical moisture-proof barrier through metal tightness. A nano waterproof coating of the enhanced moisture-proof mechanism forms a film on the outer side of the moisture absorption expansion belt, and water molecules are repelled by using nano-scale surface tension; the water-blocking yarn is spirally wound on the surface of the crosslinked polyethylene inner sheath, and forms a longitudinal water-blocking tape after being expanded when encountering water, so that water is prevented from axially permeating along the cable.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a moisture-proof photovoltaic cable structure. Background Technology

[0002] As a key component of solar power generation systems, photovoltaic cables are exposed to the outdoors for extended periods, facing risks such as rainwater infiltration and moisture penetration. Traditional photovoltaic cables typically employ a single insulation layer design, offering limited moisture resistance. Particularly at points of surface damage, moisture can easily lead to insulation aging and short-circuit faults, affecting the stability and lifespan of the photovoltaic system. Therefore, there is an urgent need to design a multi-layered, highly moisture-proof photovoltaic cable structure. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a moisture-proof photovoltaic cable structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A moisture-proof photovoltaic cable structure includes a conductor, an aluminum foil shielding layer on the outer wall of the conductor, an inner moisture-proof mechanism between the conductor and the aluminum foil shielding layer, a cross-linked polyethylene inner sheath on the outer wall of the aluminum foil shielding layer, an intermediate reinforcing structure between the aluminum foil shielding layer and the cross-linked polyethylene inner sheath, an outer protective structure on the outer wall of the cross-linked polyethylene inner sheath, and an enhanced moisture-proof mechanism on the outer wall of the conductor.

[0006] Preferably, the inner moisture-proof mechanism includes a conductor insulation layer and a moisture-absorbing expansion band. The conductor insulation layer is wrapped around the outside of the conductor, the moisture-absorbing expansion band is wrapped around the outside of the conductor insulation layer, and the aluminum foil shielding layer is tightly attached to the moisture-absorbing expansion band.

[0007] Preferably, the intermediate reinforcing structure includes an aramid fiber braided layer and a polyurethane buffer layer, wherein the aramid fiber braided layer is wound around the outside of the aluminum foil shielding layer, and the polyurethane buffer layer is coated on the surface of the aramid fiber braided layer.

[0008] Preferably, the outer protective structure includes a corrugated aluminum sheath and a UV-resistant polyethylene outer sheath, with a cross-linked polyethylene inner sheath wrapped around the outside of the polyurethane buffer layer, silicone rubber sealant applied to the joints of the corrugated aluminum sheath, and a UV-resistant polyethylene outer sheath wrapped around the outside of the corrugated aluminum sheath, with UV-resistant additives added to the surface.

[0009] Preferably, the enhanced moisture-proof mechanism includes a nano-waterproof coating, a humidity sensing strip, a flame-retardant filling layer, and water-resistant yarn. The nano-waterproof coating is applied between the moisture-absorbing expansion strip and the aluminum foil shielding layer. The humidity sensing strip is embedded in the inner wall of the corrugated aluminum sheath. The flame-retardant filling layer fills the gap between the conductor insulation layer and the moisture-absorbing expansion strip. The water-resistant yarn is spirally wound on the surface of the cross-linked polyethylene inner sheath. The outer wall of the UV-resistant polyethylene outer sheath is printed with a warning label layer.

[0010] The beneficial effects of this utility model are as follows:

[0011] An inner moisture-proof mechanism isolates moisture from the conductor through the conductor insulation layer. The moisture-absorbing expansion strip expands upon contact with water, filling gaps and blocking moisture diffusion. The aluminum foil shielding layer forms a physical moisture barrier through its metallic seal. A nano-waterproof coating enhances the moisture-proof mechanism by forming a thin film on the outside of the moisture-absorbing expansion strip, using nanoscale surface tension to repel water molecules. Water-blocking yarn is spirally wound around the surface of the cross-linked polyethylene inner sheath, expanding upon contact with water to form a longitudinal water-blocking strip, preventing moisture from penetrating along the cable's axial direction.

[0012] An aramid fiber braided layer with an intermediate reinforcing structure prevents damage to the outer layer of the cable due to external pulling forces. A polyurethane buffer layer absorbs kinetic energy from impacts such as stones through elastic deformation, reducing the risk of damage to the inner structure. In the outer protective structure, the corrugated aluminum sheath is sealed using a heat-shrink process, and the silicone rubber sealant at the joints, after curing, prevents the cable from cracking or becoming brittle within a certain temperature range. A humidity sensor strip changes from blue to red when exposed to water, facilitating quick location of moisture points by maintenance personnel. Combined with a flame-retardant filler layer, this further enhances the cable's safety and reliability in complex outdoor environments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of a moisture-proof photovoltaic cable structure proposed in this utility model;

[0014] Figure 2 This is a front view of the moisture-proof photovoltaic cable structure proposed in this utility model.

[0015] Figure 3 This is a partial cross-sectional structural diagram of a moisture-proof photovoltaic cable structure proposed in this utility model.

[0016] In the diagram: 1. Conductor, 2. Conductor insulation layer, 3. Flame retardant filling layer, 4. Moisture-absorbing expansion strip, 5. Aluminum foil shielding layer, 6. Nano waterproof coating, 7. Aramid fiber braided layer, 8. Polyurethane buffer layer, 9. Cross-linked polyethylene inner sheath, 10. Water-resistant yarn, 11. Humidity sensing strip, 12. Glue sealant, 13. UV-resistant polyethylene outer sheath, 14. Corrugated aluminum sheath, 15. Warning label layer. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figure 1-3 A moisture-proof photovoltaic cable structure includes a conductor 1, an aluminum foil shielding layer 5 on the outer wall of the conductor 1, an inner moisture-proof mechanism between the conductor 1 and the aluminum foil shielding layer 5, a cross-linked polyethylene inner sheath 9 on the outer wall of the aluminum foil shielding layer 5, an intermediate reinforcing structure between the aluminum foil shielding layer 5 and the cross-linked polyethylene inner sheath 9, and an outer protective structure on the outer wall of the cross-linked polyethylene inner sheath 9. The outer wall of the conductor 1 is equipped with an enhanced moisture-proof mechanism. The inner moisture-proof mechanism isolates moisture from the conductor 1 through the conductor insulation layer 2. A moisture-absorbing expansion band 4 expands upon contact with water, filling gaps and blocking moisture diffusion. The aluminum foil shielding layer 5 forms a physical moisture barrier through its metallic seal. A nano-waterproof coating 6 of the enhanced moisture-proof mechanism forms a thin film on the outside of the moisture-absorbing expansion band 4, using nanoscale surface tension to repel water molecules. Water-blocking yarn 10 is spirally wound around the surface of the cross-linked polyethylene inner sheath 9, expanding upon contact with water to form a longitudinal water-blocking band, preventing moisture penetration along the cable axis.

[0019] In this invention, the inner moisture-proof mechanism includes a conductor insulation layer 2 and a moisture-absorbing expansion band 4. The conductor insulation layer 2 is wrapped around the outside of the conductor 1, the moisture-absorbing expansion band 4 is wrapped around the outside of the conductor insulation layer 2, and the aluminum foil shielding layer 5 is tightly attached to the moisture-absorbing expansion band 4. By setting the inner moisture-proof mechanism, the conductor insulation layer 2 isolates moisture from the conductor 1. The moisture-absorbing expansion band 4 expands in volume when it comes into contact with water, filling the gaps and blocking the diffusion of moisture. The aluminum foil shielding layer 5 forms a physical moisture-proof barrier with its metallic tightness.

[0020] The intermediate reinforcement structure includes an aramid fiber braided layer 7 and a polyurethane buffer layer 8. The aramid fiber braided layer 7 is wrapped around the outside of the aluminum foil shielding layer 5, and the polyurethane buffer layer 8 is coated on the surface of the aramid fiber braided layer 7. The aramid fiber braided layer 7 with the intermediate reinforcement structure prevents the cable from being damaged by external force. The polyurethane buffer layer 8 absorbs the kinetic energy of stone impacts through elastic deformation, reducing the risk of damage to the inner structure.

[0021] The outer protective structure includes a corrugated aluminum sheath 14 and a UV-resistant polyethylene outer sheath 13. A cross-linked polyethylene inner sheath 9 is wrapped around the outside of a polyurethane buffer layer 8. The joints of the corrugated aluminum sheath 14 are coated with silicone rubber sealant 12. The UV-resistant polyethylene outer sheath 13 is wrapped around the outside of the corrugated aluminum sheath 14, and UV-resistant additives are added to the surface. In the outer protective structure, the corrugated aluminum sheath 14 is sealed using a heat-shrink process. After the silicone rubber sealant 12 at the joints is cured, the cable will not crack or become brittle within a certain temperature range.

[0022] The enhanced moisture-proof mechanism includes a nano-waterproof coating 6, a humidity sensing strip 11, a flame-retardant filling layer 3, and a water-blocking yarn 10. The nano-waterproof coating 6 is applied between the moisture-absorbing expansion strip 4 and the aluminum foil shielding layer 5. The humidity sensing strip 11 is embedded in the inner wall of the corrugated aluminum sheath 14. The flame-retardant filling layer 3 fills the gap between the conductor insulation layer 2 and the moisture-absorbing expansion strip 4. The water-blocking yarn 10 is spirally wound around the surface of the cross-linked polyethylene inner sheath 9. The outer wall of the UV-resistant polyethylene outer sheath 13 is printed with a warning label layer 15. The nano-waterproof coating 6 of the enhanced moisture-proof mechanism forms a thin film on the outside of the moisture-absorbing expansion strip 4, using nanoscale surface tension to repel water molecules. The water-blocking yarn 10 is spirally wound around the surface of the cross-linked polyethylene inner sheath 9, and after expanding when exposed to water, it forms a longitudinal water-blocking strip to prevent moisture from penetrating along the cable axis.

[0023] Working Principle: In the idle area of ​​this device, all the components mentioned above, and their corresponding structural parts, are connected. The specific connection methods should refer to the working principle described below, and the connection between each component should be completed in the order of operation. The detailed connection methods are well-known technologies in this field. The following mainly introduces the working principle and process, and will not elaborate further. When using this device, conductor 1 transmits electrical energy. The inner moisture-proof mechanism forms a triple moisture-proof barrier through conductor insulation layer 2, moisture-absorbing expansion band 4, and aluminum foil shielding layer 5: conductor insulation layer 2 isolates moisture from conductor 1, moisture-absorbing expansion band 4 expands when damp to seal gaps, and aluminum foil shielding layer 5 reflects moisture and provides electromagnetic shielding. The aramid fiber braided layer 7 and polyurethane buffer layer 8 of the intermediate reinforcing structure improve tensile strength and impact resistance, respectively, to prevent moisture-proof failure due to damage to the outer layer. In the outer protective structure, the cross-linked polyethylene inner sheath 9 further isolates moisture, the corrugated aluminum sheath 14 achieves a seamless seal through silicone rubber sealant 12, and the UV-resistant polyethylene outer sheath 13 resists ultraviolet aging. The enhanced moisture-proof structure features a nano-waterproof coating 6 that reduces moisture adsorption due to its hydrophobic properties, water-resistant yarns 10 that prevent the longitudinal spread of moisture, a humidity-sensing strip 11 that monitors internal moisture in real time, and a flame-retardant filling layer 3 that inhibits flame spread while providing moisture protection. The entire structure, through the synergy of material properties and physical design, achieves multiple functions including moisture protection, mechanical protection, and environmental adaptability.

[0024] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A moisture-proof photovoltaic cable structure, comprising a conductor (1), characterized in that, An aluminum foil shielding layer (5) is provided on the outer wall of the conductor (1). An inner moisture-proof mechanism is provided between the conductor (1) and the aluminum foil shielding layer (5). A cross-linked polyethylene inner sheath (9) is provided on the outer wall of the aluminum foil shielding layer (5). An intermediate reinforcing structure is provided between the aluminum foil shielding layer (5) and the cross-linked polyethylene inner sheath (9). An outer protective structure is provided on the outer wall of the cross-linked polyethylene inner sheath (9). An enhanced moisture-proof mechanism is provided on the outer wall of the conductor (1).

2. The moisture-proof photovoltaic cable structure according to claim 1, characterized in that, The inner moisture-proof mechanism includes a conductor insulation layer (2) and a moisture-absorbing expansion band (4). The conductor insulation layer (2) is wrapped around the outside of the conductor (1), and the moisture-absorbing expansion band (4) is wrapped around the outside of the conductor insulation layer (2). The aluminum foil shielding layer (5) is tightly attached to the moisture-absorbing expansion band (4).

3. The moisture-proof photovoltaic cable structure according to claim 2, characterized in that, The intermediate reinforcing structure includes an aramid fiber braided layer (7) and a polyurethane buffer layer (8). The aramid fiber braided layer (7) is wrapped around the outside of the aluminum foil shielding layer (5), and the polyurethane buffer layer (8) is coated on the surface of the aramid fiber braided layer (7).

4. The moisture-proof photovoltaic cable structure according to claim 3, characterized in that, The outer protective structure includes a corrugated aluminum sheath (14) and a UV-resistant polyethylene outer sheath (13). A cross-linked polyethylene inner sheath (9) is wrapped around the outside of the polyurethane buffer layer (8). The joints of the corrugated aluminum sheath (14) are coated with silicone rubber sealant (12). The UV-resistant polyethylene outer sheath (13) is wrapped around the outside of the corrugated aluminum sheath (14). Anti-ultraviolet additives are added to the surface.

5. The moisture-proof photovoltaic cable structure according to claim 4, characterized in that, The enhanced moisture-proof mechanism includes a nano waterproof coating (6), a humidity sensing strip (11), a flame-retardant filling layer (3), and a water-blocking yarn (10). The nano waterproof coating (6) is applied between the moisture-absorbing expansion strip (4) and the aluminum foil shielding layer (5). The humidity sensing strip (11) is embedded in the inner wall of the corrugated aluminum sheath (14). The flame-retardant filling layer (3) fills the gap between the conductor insulation layer (2) and the moisture-absorbing expansion strip (4). The water-blocking yarn (10) is spirally wound on the surface of the cross-linked polyethylene inner sheath (9). The outer wall of the UV-resistant polyethylene outer sheath (13) is printed with a warning label layer (15).

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