Wear-resistant flame-retardant photovoltaic cable

Abstract

The utility model discloses a wear-resistant flame-retardant photovoltaic cable which is high in structural strength, good in flame retardant property, wear-resistant, corrosion-resistant and aging-resistant. Comprising a cable body, a plurality of groups of cable cores are arranged in the cable body, an anti-bending block is arranged in the center of the cable body, the cable cores are arranged around the anti-bending block in a surrounding mode, and a reinforcing sheath, a flame-retardant sheath, a wear-resistant sheath and an ultraviolet-proof layer are sequentially arranged on the outer side of the cable body. And the ultraviolet-proof layer is an ultraviolet-proof coating which is coated on the outer surface of the wear-resistant sheath.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a wear-resistant and flame-retardant photovoltaic cable. Background Art

[0002] Photovoltaic cables are a crucial and indispensable component of solar photovoltaic power generation systems. Typically, the low-voltage direct current generated by photovoltaic power generation is converted to alternating current for output, and the cables connecting photovoltaic modules and AC / DC inverters are photovoltaic cables. As the backbone of power transmission in photovoltaic power generation facilities, photovoltaic cables are directly related to the safety, reliability, and advancement of solar photovoltaic power generation systems. Existing photovoltaic cable-related technologies suffer from poor torsion and bending resistance, which can easily damage the conductor at the center of the cable when squeezed by external forces. In severe cases, the cable can break, impacting normal use. Existing photovoltaic cables and photovoltaic systems are often used in harsh environmental conditions, such as high temperatures and ultraviolet radiation. Under the scorching summer sun, photovoltaic cables remain in a high-temperature state. However, existing high-temperature-resistant cables are not very effective and can even catch fire at high temperatures, resulting in poor practicality.

[0003] For example, the Chinese patent with publication number CN218957434U discloses a highly wear-resistant and flame-retardant photovoltaic cable, which relates to the field of photovoltaic cable technology and includes a photovoltaic cable body, wherein a cable core is provided inside the photovoltaic cable body, an anti-folding rod is provided at the center of the photovoltaic cable body, a polyethylene wrapping film is provided on the outside of the photovoltaic cable body, and a rubber filler 1 is provided in the gap between the photovoltaic cable body and the polyethylene wrapping film. By arranging the cable core inside the photovoltaic cable body, a better protective effect can be achieved, thereby preventing the cable core from moving. Then, by arranging anti-folding rods at the centers of the three photovoltaic cable bodies, a better supporting and fixing effect is achieved, and the anti-bending and anti-torsion effect is achieved. Furthermore, by arranging the anti-folding rod, polyethylene wrapping film, rubber filler 1 and rubber filler 2, the torsional and anti-bending properties of the photovoltaic cable are effectively improved.

[0004] However, photovoltaic systems are often used in harsh environmental conditions, such as high temperature and ultraviolet radiation. Under the scorching sun in summer, photovoltaic cables will always be in a high-temperature state. The high-wear-resistant and flame-retardant photovoltaic cables proposed in the above patents are not better in terms of high-temperature resistance. They may even catch fire at high temperatures, resulting in poor practicality. At the same time, they are prone to sunlight aging, which reduces the service life of the cables. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the defects of the existing technical problems and provide a wear-resistant and flame-retardant photovoltaic cable with high structural strength, good flame-retardant performance, wear resistance, corrosion resistance and aging resistance.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a wear-resistant and flame-retardant photovoltaic cable, comprising a cable body, a plurality of cable cores are arranged inside the cable body, an anti-folding block is provided at the center of the cable body, the cable cores are arranged around the anti-folding block, and the outer side of the cable body is provided with a reinforced sheath, a flame-retardant sheath, a wear-resistant sheath and an anti-ultraviolet layer in sequence, and the anti-ultraviolet layer is an anti-ultraviolet coating coated on the outer surface of the wear-resistant sheath.

[0007] Furthermore, the outer side of the cable core is wrapped with an insulating layer and a shielding layer in sequence, the insulating layer is a non-woven fabric layer, and the shielding layer is formed by wrapping an aluminum tape.

[0008] Furthermore, the anti-breakage block is made of high-strength rubber, and a reinforcing steel core is fixedly provided at the center of the anti-breakage block.

[0009] Furthermore, the reinforced sheath includes an armor layer, a protective layer and a buffer layer sequentially arranged on the outside of the cable body, and the armor layer is a steel belt wrapped around the outer surface of the cable body.

[0010] Furthermore, a plurality of spring pieces are provided in the protective layer, and the spring pieces are evenly distributed in the protective layer.

[0011] Furthermore, a plurality of buffer cavities are provided in the buffer layer, and the buffer cavities correspond to the spring pieces one by one.

[0012] Furthermore, the flame retardant sheath comprises a waterproof layer, a fire barrier layer and a flame retardant layer sequentially arranged on the outside of the reinforcing sheath; the flame retardant layer is a flame retardant tape filled with low-smoke halogen-free flame retardant material.

[0013] Furthermore, the waterproof layer is a water-blocking tape, and the fire-blocking layer is refractory mud wrapped outside the waterproof layer.

[0014] Furthermore, the wear-resistant sheath is wrapped around the outside of the flame-retardant sheath, and the wear-resistant sheath is made of polyvinyl chloride.

[0015] Furthermore, a plurality of wear-resistant protrusions are provided on the outer surface of the wear-resistant sleeve.

[0016] By adopting the above technical solution, the utility model has the following beneficial effects:

[0017] 1. The anti-bending block and the reinforced steel core can improve the overall strength of the cable and effectively improve the cable's torsion and bending resistance. The cable body is also equipped with fillers, which can enrich the interior of the cable body and increase the strength of the cable;

[0018] 2. The outer side of the cable body is provided with an armor layer, a protective layer and a buffer layer in sequence. The armor layer is used to protect the cable body. The protective layer is provided with shrapnel. When the cable is bent or squeezed, the shrapnel deforms to disperse the bending or squeezing force, which can effectively prevent the cable from being deformed or broken due to squeezing or bending. There are multiple buffer cavities in the buffer layer. When the cable is squeezed or bent, the buffer cavity deforms to buffer the pressure, avoiding deformation or breakage of the cable, thereby reducing damage to the cable core and improving the overall strength of the cable.

[0019] 3. The flame retardant layer is filled with low-smoke, halogen-free flame retardant materials. When burning, the flame retardant materials will release crystallized water and absorb a large amount of heat. The fire-retardant layer is refractory mud wrapped outside the waterproof layer. When the flame retardant material in the flame retardant layer burns and releases water, the refractory mud hardens under the action of water and high temperature, thereby isolating oxygen from entering the cable, further playing a flame retardant role.

[0020] 4. The waterproof layer is a water-blocking tape wrapped around the outside of the buffer layer, which effectively reduces moisture and water from entering the cable;

[0021] 5. The outer surface of the wear-resistant sheath is provided with multiple wear-resistant protrusions, which can further improve the wear resistance of the cable. At the same time, the outer surface of the wear-resistant sheath is coated with anti-ultraviolet paint, which can prevent ultraviolet rays and reduce sunlight aging while also improving the corrosion resistance of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of the wear-resistant and flame-retardant photovoltaic cable of the present invention.

[0023] Reference numerals: 1. Cable body; 2. Reinforced sheath; 3. Flame-retardant sheath; 4. Wear-resistant sheath;

[0024] 5. Anti-ultraviolet layer; 11. Anti-breakage block; 12. Cable core; 13. Insulation layer; 14. Shielding layer;

[0025] 15. Reinforced steel core; 16. Filler; 21. Armor layer; 22. Protective layer; 23. Buffer layer; 221. Shrapnel; 231. Buffer cavity; 31. Waterproof layer; 32. Fire barrier layer; 33. Flame retardant layer; 41. Wear-resistant protrusions. DETAILED DESCRIPTION

[0026] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0027] like Figure 1As shown, in this embodiment, a wear-resistant and flame-retardant photovoltaic cable is provided, including a cable body 1, a plurality of cable cores 12 are arranged inside the cable body 1, an anti-bending block 11 is provided at the center of the cable body 1, the cable cores 12 are arranged around the anti-bending block 11, and a reinforced sheath 2, a flame-retardant sheath 3 and a wear-resistant sheath 4 are provided on the outside of the cable body 1 in sequence.

[0028] In this embodiment, the outer side of the cable core 12 is wrapped with an insulating layer 13 and a shielding layer 14 in sequence. The insulating layer 13 is a non-woven fabric layer. By setting the insulating layer 13, mutual interference of electrical signals between the cable cores 12 can be avoided. The shielding layer 14 is wrapped with aluminum tape. The shielding layer 14 can avoid local discharge in the cable body 1, and also avoid the cable from being interfered with by external electromagnetic signals. The insulating layer 13 is set between the cable core 12 and the shielding layer 14, and it can also prevent the aluminum tape of the shielding layer 14 from scratching the cable core 12, thereby protecting the cable core 12.

[0029] In this embodiment, the anti-break block 11 is made of high-strength rubber, and a reinforced steel core 15 is fixedly mounted at its center. These elements enhance the cable's overall strength, effectively improving its resistance to twisting and bending. A groove is defined on the outer surface of the anti-break block 11, into which the shielding layer 14 surrounding the cable core 12 is securely mounted.

[0030] In this embodiment, a filler 16 is further provided in the cable body 1. The filler 16 can enrich the interior of the cable body 1, increase the strength of the cable, and reduce the wear of the cable core 12. At the same time, the anti-bending block 11 and the cable core 12 in the cable body 1 are displaced, thereby achieving a better supporting and fixing effect, and achieving anti-bending and anti-torsion effects.

[0031] In this embodiment, the reinforced sheath 2 includes an armor layer 21, a protective layer 22 and a buffer layer 23 arranged on the outside of the cable body 1. The armor layer 21 is a steel belt wrapped around the outer surface of the cable body 1 for protecting the cable body 1. The protective layer 22 is wrapped around the outside of the armor layer 21. A plurality of spring pieces 221 are provided in the protective layer 22. The spring pieces 221 are evenly distributed in the protective layer 22. When the cable is bent or squeezed, the spring pieces 221 are deformed to disperse the force of bending or squeezing, which can effectively prevent the cable from being deformed or broken due to squeezing or bending. The buffer layer 23 is wrapped around the outside of the protective layer 22. A plurality of buffer cavities 231 are provided in the buffer layer 23. The buffer cavities 231 correspond one-to-one to the spring pieces 221. When the cable is squeezed or bent, the buffer cavity 231 is deformed to buffer the pressure and prevent the cable from being deformed or broken, thereby reducing damage to the cable core 12 and improving the overall strength of the cable.

[0032] In this embodiment, the spring piece 221 may be an arc-shaped spring piece 221 or a V-shaped spring piece 221 .

[0033] In this embodiment, the flame retardant sheath 3 includes a waterproof layer 31, a fire barrier layer 32 and a flame retardant layer 33 arranged on the outside of the reinforced sheath 2. The flame retardant layer 33 is a flame retardant tape wrapped around the outside of the fire barrier layer 32. The flame retardant tape is filled with low-smoke halogen-free flame retardant material. When burned, the flame retardant material will release crystalline water and absorb a large amount of heat; at the same time, the dehydration reaction will produce a large amount of water vapor, which can dilute the combustible gas and thus prevent combustion. In addition, a layer of non-melting and non-combustible oxide hard shell will be formed on the surface of the material. The flame retardant material in this embodiment can be magnesium hydroxide or aluminum hydroxide.

[0034] In this embodiment, the fire-retardant layer 32 is refractory mud wrapped around the waterproof layer 31. When the flame-retardant material in the flame-retardant layer 33 burns and releases moisture, the refractory mud hardens under the action of water and high temperature, thereby isolating oxygen from entering the interior of the cable, further playing a flame-retardant role.

[0035] In this embodiment, the waterproof layer 31 is a water-blocking tape wrapped around the outside of the buffer layer 23, which effectively reduces moisture and water from entering the interior of the cable.

[0036] In this embodiment, a wear-resistant sheath 4 is wrapped around the outside of the flame-retardant sheath 3. The wear-resistant sheath 4 is made of polyvinyl chloride. A plurality of wear-resistant protrusions 41 are provided on the outer surface of the wear-resistant sheath 4, which can further improve the wear resistance of the cable. An anti-ultraviolet layer 5 is provided on the outside of the wear-resistant sheath 4. The anti-ultraviolet layer 5 is an anti-ultraviolet coating applied on the outer surface of the wear-resistant sheath 4. It can protect against ultraviolet rays and reduce sunlight aging while also improving the corrosion resistance of the cable. In this embodiment, the anti-ultraviolet coating can be fluorocarbon paint or acrylic polyurethane anti-corrosion coating.

[0037] The advantages of the present invention are: an anti-folding block 11 is provided in the center of the cable body 1, and the anti-folding block 11 is made of high-strength rubber. A reinforcing steel core 15 is fixedly provided in the center of the anti-folding block 11. The anti-folding block 11 and the reinforcing steel core 15 can improve the overall strength of the cable and effectively improve the torsion and bending resistance of the cable; a filler 16 is also provided in the cable body 1, and the filler 16 can enrich the interior of the cable body 1, increase the strength of the cable, and reduce the wear of the cable core 12. At the same time, the anti-folding block 11 and the cable core 12 in the cable body 1 are displaced, thereby achieving a better supporting and fixing effect, and achieving anti-bending and anti-corrosion properties. The outer side of the cable body 1 is provided with an armor layer 21, a protective layer 22 and a buffer layer 23 in sequence. The armor layer 21 is used to protect the cable body 1. The protective layer 22 is wrapped around the outer side of the armor layer 21. Shrapnel 221 is provided in the protective layer 22. Shrapnel 221 is evenly distributed in the protective layer 22. When the cable is bent or squeezed, the shrapnel 221 is deformed to disperse the force of bending or squeezing, which can effectively prevent the cable from being deformed or broken due to squeezing or bending. The buffer layer 23 is wrapped around the outer side of the protective layer 22. A plurality of buffer cavities 231 are provided in the buffer layer 23. The buffer cavity 231 and the shrapnel 2 21 one-to-one correspondence, when the cable is squeezed or bent, the buffer cavity 231 deforms, which plays a role in buffering the pressure, preventing the cable from being deformed or broken, thereby reducing the damage to the cable core 12 and improving the overall strength of the cable; the flame retardant layer 33 is filled with low-smoke and halogen-free flame retardant material. When burned, the flame retardant material will release crystalline water and absorb a large amount of heat; at the same time, the dehydration reaction will produce a large amount of water vapor, which can dilute the combustible gas, thereby preventing combustion, and a layer of non-melting and non-combustible oxide hard shell will be formed on the surface of the material; the fire barrier layer 32 is a refractory mud wrapped outside the waterproof layer 31 When the flame retardant material in the flame retardant layer 33 burns and releases moisture, the refractory mud hardens under the action of water and high temperature, thereby isolating oxygen from entering the interior of the cable, further playing a flame retardant role; the waterproof layer 31 is a water-blocking tape wrapped around the outside of the buffer layer 23, which effectively reduces moisture and water from entering the interior of the cable; the wear-resistant sheath 4 is made of polyvinyl chloride, and a plurality of wear-resistant protrusions 41 are provided on the outer surface of the wear-resistant sheath 4, which can further improve the wear resistance of the cable. At the same time, the outer surface of the wear-resistant sheath 4 is coated with an anti-ultraviolet paint, which can not only prevent ultraviolet rays and reduce sunlight aging, but also improve the corrosion resistance of the cable.

[0038] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wear-resistant and flame-retardant photovoltaic cable, characterized by: The invention comprises a cable body (1), wherein a plurality of cable cores (12) are provided inside the cable body (1), an anti-folding block (11) is provided at the center of the cable body (1), and the cable cores (12) are arranged around the anti-folding block (11), and the outer side of the cable body (1) is provided with a reinforcement sheath (2), a flame retardant sheath (3), a wear-resistant sheath (4) and an anti-ultraviolet layer (5) in sequence, wherein the anti-ultraviolet layer (5) is an anti-ultraviolet coating applied on the outer surface of the wear-resistant sheath (4), and the reinforcement sheath (2) comprises an armor layer (21), a protective layer (22) and a buffer layer (23) arranged in sequence on the outer side of the cable body (1), and the armor layer (21) is a steel belt wrapped around the outer surface of the cable body (1).

2. The wear-resistant and flame-retardant photovoltaic cable according to claim 1, characterized in that: The outer side of the cable core (12) is wrapped with an insulating layer (13) and a shielding layer (14) in sequence, the insulating layer (13) is a non-woven fabric layer, and the shielding layer (14) is formed by wrapping an aluminum tape.

3. The wear-resistant and flame-retardant photovoltaic cable according to claim 1, characterized in that: The anti-breakage block (11) is made of high-strength rubber, and a reinforcing steel core (15) is fixedly provided at the center of the anti-breakage block (11).

4. The wear-resistant and flame-retardant photovoltaic cable according to claim 1, characterized in that: A plurality of spring pieces (221) are provided in the protective layer (22), and the spring pieces (221) are evenly distributed in the protective layer (22).

5. The wear-resistant and flame-retardant photovoltaic cable according to claim 4, characterized in that: A plurality of buffer cavities (231) are provided in the buffer layer (23), and the buffer cavities (231) correspond one-to-one to the spring pieces (221).

6. The wear-resistant and flame-retardant photovoltaic cable according to claim 1, characterized in that: The flame retardant sheath (3) comprises a waterproof layer (31), a fire barrier layer (32) and a flame retardant layer (33) which are sequentially arranged on the outside of the reinforcing sheath (2); the flame retardant layer (33) is a flame retardant tape.

7. The wear-resistant and flame-retardant photovoltaic cable according to claim 6, characterized in that: The waterproof layer (31) is a water-blocking tape, and the fire-blocking layer (32) is refractory mud wrapped around the waterproof layer (31).

8. The wear-resistant and flame-retardant photovoltaic cable according to claim 1, characterized in that: The wear-resistant sheath (4) is wrapped around the outside of the flame-retardant sheath (3), and the wear-resistant sheath (4) is made of polyvinyl chloride.

9. The wear-resistant and flame-retardant photovoltaic cable according to claim 1, characterized in that: A plurality of wear-resistant protrusions (41) are provided on the outer surface of the wear-resistant sleeve (4).

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