A water-resistant, salt spray-resistant, and radiation-resistant power cable

Abstract

This utility model discloses a water-blocking, salt spray-resistant, and radiation-resistant power cable, comprising a low-smoke halogen-free sheath. The low-smoke halogen-free sheath has a low-smoke halogen-free wrapping tape inside. The inner surface of the low-smoke halogen-free wrapping tape has an inner water-blocking section. Inside the inner water-blocking section is an inner filling section. Inside the inner filling section is an aluminum-plastic longitudinal sheath. Multiple conductors are arranged around the inner perimeter of the aluminum-plastic longitudinal sheath. The surface of each conductor is wrapped with an outer water-blocking tape. The surface of the outer water-blocking tape is covered with low-smoke halogen-free insulation material. Alkali-free filler rope is filled between the low-smoke halogen-free insulation material and the aluminum-plastic longitudinal sheath. In this utility model, the entire inner filling section is made of neoprene rubber, which has excellent sealing performance, thus blocking moisture from entering the conductor. Simultaneously, the inner water-blocking section is made of superabsorbent polymer resin, which absorbs moisture, thereby preventing moisture from seeping into the cable.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a water-blocking, salt spray-resistant, and radiation-resistant power cable. Background Technology

[0002] With the development of manufacturing industries and changes in the ecological environment, various special cables have emerged in the cable manufacturing industry. Photovoltaic power generation, as a clean energy source, produces no pollutants or greenhouse gases and can significantly reduce emissions of harmful gases such as carbon dioxide, playing a vital role in mitigating climate change and improving air quality. Photovoltaic power generation sites are generally located in the high-temperature, arid, or saline-alkali land of Northwest China. These environments present harsh conditions such as strong radiation and high salt spray. In view of these circumstances, cables suitable for operation in such environments have been developed.

[0003] However, existing photovoltaic power cables may not have strong water-blocking properties, allowing water to seep into the cable; their salt spray resistance is not high, causing the conductor to be corroded by salt spray; and their UV resistance and high temperature resistance may also be low, which may lead to accelerated aging and shortened service life under long-term operation in harsh environments with strong radiation. Therefore, they do not meet the current requirements. To address this, we propose a power cable with water-blocking properties, salt spray resistance, and radiation resistance. Utility Model Content

[0004] The purpose of this invention is to provide a water-blocking, salt spray-resistant, and radiation-resistant power cable to solve the problems mentioned in the background art, such as the photovoltaic power cable having weak water-blocking performance, which allows water to seep into the cable; low salt spray resistance, which may cause the conductor to be corroded by salt spray; and low resistance to ultraviolet rays and high temperatures, which may lead to accelerated aging and shortened service life under long-term operation in harsh environments with strong radiation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a water-blocking, salt spray-resistant, and radiation-resistant power cable, comprising a low-smoke halogen-free sheath, wherein the interior of the low-smoke halogen-free sheath is provided with a low-smoke halogen-free wrapping tape, the inner surface of the low-smoke halogen-free wrapping tape is provided with an inner water-blocking part, the inner water-blocking part is provided with an inner filling part, the inner filling part is provided with an aluminum-plastic longitudinal sheath, the interior of the aluminum-plastic longitudinal sheath is provided with multiple conductors around its perimeter, the surface of the conductors is wrapped with an outer water-blocking tape, the surface of the outer water-blocking tape is covered with a low-smoke halogen-free insulating material, and an alkali-free filling rope is filled between the low-smoke halogen-free insulating material and the aluminum-plastic longitudinal sheath.

[0006] Preferably, the inner filling portion includes a rubber insulating layer covering the surface of the aluminum-plastic longitudinal cladding layer, and the surface of the rubber insulating layer is provided with a plurality of annular inlay grooves arranged axially, and the inner sides of the annular inlay grooves are provided with a plurality of side grooves.

[0007] Preferably, the inner water-blocking part includes an inner water-blocking layer covering the surface of the rubber insulation layer, and a plurality of fixing rings are axially arranged on the inner surface of the inner water-blocking layer, and a plurality of lateral fixing strips are provided on both sides of the fixing rings.

[0008] Preferably, the fixing ring is inserted into the annular inlay groove, and the side fixing strip is snapped into the side groove.

[0009] Preferably, the alkali-free filling rope is made of alkali-free glass fiber twisted into a strip structure, and the cross-sectional diameter of the alkali-free filling rope is 20mm.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. This utility model uses alkali-free filler rope made of alkali-free glass fiber twisted into a strip structure. Alkali-free glass fiber has strong corrosion resistance. The alkali-free filler rope is set as a strip structure and low-smoke halogen-free insulation material is wrapped inside. Since the cross-sectional diameter of the alkali-free filler rope is 20mm, the thickness of the overall alkali-free filler rope is set to be at least 20mm. This further improves the overall corrosion resistance of the cable and reduces the corrosive effect of salt spray on the cable in the environment.

[0012] 2. This utility model is an environmentally friendly insulating material made of polyolefin material through irradiation crosslinking treatment of low-smoke halogen-free insulation material, low-smoke halogen-free wrapping tape, and low-smoke halogen-free wrapping tape. This material does not release halogen-containing toxic gases when burning and has the characteristics of flame retardancy, low smoke, and environmental protection. The cable uses these materials as the main external protective layer, which increases the maximum operating temperature of the cable to 120°C. Thus, the entire cable can be used in harsh conditions such as deserts with strong ultraviolet radiation and high temperature.

[0013] 3. The inner filling part of this utility model is made of neoprene rubber, which has good sealing performance and can block water vapor from the outside of the conductor. At the same time, the inner water-blocking part is made of superabsorbent polymer, which can absorb water vapor and thus prevent water vapor from seeping into the inside of the cable. Attached Figure Description

[0014] Figure 1 This is a frontal sectional view of the overall structure of this utility model;

[0015] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0017] Figure 4 This utility model Figure 3Enlarged view of the structure at point B;

[0018] Figure 5 This utility model Figure 3 Cross-sectional view of the three-dimensional structure.

[0019] In the diagram: 1. Conductor; 2. Outer water-blocking tape; 3. Low-smoke halogen-free insulation material; 4. Alkali-free filler rope; 5. Aluminum-plastic longitudinal sheath; 6. Low-smoke halogen-free wrapping tape; 7. Low-smoke halogen-free sheath; 8. Inner filling part; 801. Rubber insulation layer; 802. Annular inlay groove; 803. Side groove; 9. Inner water-blocking part; 901. Inner water-blocking layer; 902. Fixing ring; 903. Side fixing strip. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1 to 5 An embodiment of this utility model provides: a water-blocking, salt spray-resistant, and radiation-resistant power cable, including a low-smoke halogen-free sheath 7, a low-smoke halogen-free wrapping tape 6 inside the low-smoke halogen-free sheath 7, an inner water-blocking part 9 on the inner surface of the low-smoke halogen-free wrapping tape 6, an inner filling part 8 inside the inner water-blocking part 9, an aluminum-plastic longitudinal wrapping layer 5 inside the inner filling part 8, a plurality of conductors 1 around the inner perimeter of the aluminum-plastic longitudinal wrapping layer 5, an outer water-blocking tape 2 wrapped around the surface of the conductors 1, a low-smoke halogen-free insulating material 3 covering the surface of the outer water-blocking tape 2, and an alkali-free filling rope 4 filling the space between the low-smoke halogen-free insulating material 3 and the aluminum-plastic longitudinal wrapping layer 5;

[0022] The surface of conductor 1 is tin-plated, which protects the copper wire from oxidation caused by environmental factors outdoors and ensures the electrical performance of the cable. The surface of conductor 1 is also wrapped with an outer water-blocking tape 2, which is made of highly waterproof polyethylene material to prevent water vapor from entering the conductor 1.

[0023] The alkali-free filler rope 4 is made of alkali-free glass fiber twisted into a strip structure. The cross-sectional diameter of the alkali-free filler rope 4 is 20mm. The alkali-free glass fiber in this configuration has strong corrosion resistance. The overall alkali-free filler rope 4 is set as a strip structure and wraps the low-smoke halogen-free insulation material 3 inside. Since the cross-sectional diameter of the alkali-free filler rope 4 is 20mm, the overall thickness of the wrapping of the alkali-free filler rope 4 is set to be at least 20mm. This further improves the overall corrosion resistance of the cable and reduces the corrosive effect of salt spray on the cable in the environment.

[0024] Among them, the low-smoke halogen-free insulation material 3, the low-smoke halogen-free wrapping tape 6 and the low-smoke halogen-free wrapping tape 6 are all environmentally friendly insulation materials that have undergone radiation cross-linking treatment of polyolefin materials. When burning, this material does not release halogen-containing toxic gases and has the characteristics of flame retardancy, low smoke and environmental protection. The cable uses these materials as the main external protective layer, which increases the maximum operating temperature of the cable to 125°C. Thus, the entire cable can be used in harsh conditions such as deserts with strong ultraviolet radiation and high temperature.

[0025] The inner filling part 8 includes a rubber insulating layer 801 covering the surface of the aluminum-plastic longitudinal wrapping layer 5. The surface of the rubber insulating layer 801 is provided with a plurality of annular inlay grooves 802 arranged axially. Both sides of the annular inlay grooves 802 are provided with a plurality of side grooves 803. The inner water blocking part 9 includes an inner water blocking layer 901 covering the surface of the rubber insulating layer 801. The inner surface of the inner water blocking layer 901 is provided with a plurality of fixing rings 902 arranged axially. Both sides of the fixing rings 902 are provided with a plurality of side fixing strips 903.

[0026] The inner filling part 8 is made of neoprene rubber, which has good sealing performance and can therefore block moisture from entering the conductor 1. Meanwhile, the inner water-blocking part 9 is made of superabsorbent polymer, which can absorb moisture and prevent it from seeping into the cable. The surface of the rubber insulation layer 801 is provided with annular grooves 802. During the overall cable manufacturing process, the inner water-blocking layer 901 covers the surface of the rubber insulation layer 801, and multiple fixing rings 902 inside the inner water-blocking layer 901 are inserted into the annular grooves 802. This design allows the inner water-blocking layer 901 to be fixed to the surface of the rubber insulation layer 801 by the fixing ring 902, and the side fixing strip 903 to be fixed in the side groove 803. The snap-fit ​​between the side fixing strip 903 and the side groove 803 further improves the fixing performance of the inner water-blocking layer 901 on the surface of the rubber insulation layer 801. With this design, the inner filling part 8 and the inner water-blocking part 9 can be tightly fitted together, further improving the water-blocking performance of the inner filling part 8 and the inner water-blocking part 9.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A water-resistant, salt spray-resistant, and radiation-resistant power cable, comprising a low-smoke halogen-free sheath (7), characterized in that: The low-smoke halogen-free sheath (7) has a low-smoke halogen-free wrapping tape (6) inside. The inner surface of the low-smoke halogen-free wrapping tape (6) has an inner water-blocking part (9). The inner water-blocking part (9) has an inner filling part (8) inside. The inner filling part (8) has an aluminum-plastic longitudinal wrapping layer (5) inside. The aluminum-plastic longitudinal wrapping layer (5) has multiple conductors (1) around its inner perimeter. The surface of the conductors (1) is wrapped with an outer water-blocking tape (2). The surface of the outer water-blocking tape (2) is covered with a low-smoke halogen-free insulating material (3). Alkali-free filling rope (4) is filled between the low-smoke halogen-free insulating material (3) and the aluminum-plastic longitudinal wrapping layer (5).

2. The power cable with water-blocking performance, salt-fog resistance and irradiation resistance according to claim 1, characterized in that: The inner filling part (8) includes a rubber insulation layer (801) covering the surface of the aluminum-plastic longitudinal wrapping layer (5). The surface of the rubber insulation layer (801) is provided with a plurality of annular inlay grooves (802) arranged axially. Both sides of the annular inlay grooves (802) are provided with a plurality of side grooves (803).

3. The power cable with water-blocking performance, salt-fog resistance and irradiation resistance according to claim 2, characterized in that: The inner water-blocking part (9) includes an inner water-blocking layer (901) covering the surface of the rubber insulation layer (801). Multiple fixing rings (902) are arranged axially on the inner surface of the inner water-blocking layer (901), and multiple side fixing strips (903) are provided on both sides of the fixing rings (902).

4. The power cable with water-blocking performance, salt-fog resistance and irradiation resistance according to claim 3, characterized in that: The fixing ring (902) is inserted into the annular inlay groove (802), and the side fixing strip (903) is snapped into the side groove (803).

5. The power cable with water-blocking, salt-fog, and irradiation resistance according to claim 4, characterized in that: The alkali-free filling rope (4) is made of alkali-free glass fiber twisted into a strip structure, and the cross-sectional diameter of the alkali-free filling rope (4) is 20 mm.

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