Wear and age resistant power cable

Abstract

The utility model discloses a kind of wear-resistant aging-resistant power cable, realize the significant promotion and balance of wear resistance, aging resistance, mechanical strength, flexibility, electrical performance, environmental adaptability and other aspects performance, especially suitable for harsh environment, need to be frequently moved bending, high reliability and life requirement power transmission occasion. Including inner sheath, outer sheath and conductor, the conductor is provided with multiple groups, multiple the conductor is located in the inner sheath, the outside of the conductor is equipped with first shielding layer, insulating layer and second shielding layer in proper order, and multiple the conductor is filled with filling rope in its gap after being cabled, the outer sheath includes buffer layer, reinforcing layer and wear layer sequentially arranged on the outside of the inner sheath, and protective coating is sprayed on the surface of the wear layer.

Description

Technical Field

[0001] This utility model relates to the field of wire and cable technology, specifically to a wear-resistant and aging-resistant power cable. Background Technology

[0002] A cable is a device for transmitting electrical energy or signals, typically composed of several or groups of conductors. The most common type of cable used outdoors consists of several conductors and an insulation layer surrounding them. This type of outdoor cable has a simple structure and low production cost, but its overall performance is poor and its lifespan is short. Therefore, some companies have made various improvements to the materials and structure of cables, producing cables specifically designed for outdoor use.

[0003] For example, Chinese patent CN219512858U discloses a corrosion-resistant outdoor cable, including a cable body and connectors. An outer protective layer is fixedly disposed on the outermost side of the cable body. This outer protective layer includes an outer sheath, a filling layer, armor, and an inner sheath. Multiple bases are fixedly disposed at equal intervals on the surface of the inner sheath. A moisture-proof layer is fixedly disposed inside the inner sheath. Multiple springs are fixedly disposed between the multiple bases and the moisture-proof layer. A cavity is fixedly disposed inside the moisture-proof layer. Connectors are movably disposed at the joint of the cable body. In this invention, the cable effectively strengthens its compressive and tensile strength through multiple protective layers, prevents excessive internal temperature through the thermal insulation performance of the cavity, effectively mitigates vibrations caused by external impacts by the springs, and extends the cable's service life. The connectors effectively enhance the cable's compressive strength.

[0004] However, cables used outdoors are often damaged by various factors such as animal bites, pulling, wind, rain, and sun exposure. Simply increasing the compressive strength of the cable cannot effectively improve its service life when used outdoors. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the existing technology and provide a wear-resistant and aging-resistant power cable, which achieves a significant improvement and balance in many aspects such as wear resistance, aging resistance, mechanical strength, flexibility, electrical performance, and environmental adaptability. It is especially suitable for power transmission occasions with harsh environments, frequent movement and bending, and high requirements for reliability and lifespan.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a wear-resistant and aging-resistant power cable, including an inner sheath, an outer sheath, and conductors. The conductors are provided in multiple groups, which are located inside the inner sheath. A first shielding layer, an insulation layer, and a second shielding layer are sequentially provided on the outer side of the conductors. After the multiple groups of conductors are cabled, filler ropes are filled between them. The outer sheath includes a buffer layer, a reinforcing layer, and a wear-resistant layer sequentially disposed on the outer side of the inner sheath, and a protective coating is sprayed on the surface of the wear-resistant layer.

[0007] Furthermore, both the first and second shielding layers are made of cross-linked semi-conductive shielding material with a thickness of 0.8 mm.

[0008] Furthermore, the insulating layer material is cross-linked polyethylene.

[0009] Furthermore, the filling rope is a non-hygroscopic filling rope.

[0010] Furthermore, the inner sheath is made of high-performance polyvinyl chloride with a thickness of 1.0-1.4 mm.

[0011] Furthermore, the buffer layer is made of thermoplastic polyurethane, with a thickness of 0.3-0.8 mm.

[0012] Furthermore, the reinforcing layer is woven from a mixture of aramid fiber and high-modulus polyethylene fiber in a ratio of 7:3, with a thickness of 0.4-0.6 mm.

[0013] Furthermore, the wear-resistant layer is made of polyurethane elastomer, with nano-ceramic particles and UV absorbers added thereto.

[0014] Furthermore, the protective coating is a silicone nano-coating.

[0015] Furthermore, the conductor is made of high-purity oxygen-free copper.

[0016] By adopting the above technical solution, this utility model has the following beneficial effects: the wear-resistant layer significantly improves the hardness and wear resistance of the cable surface, effectively resisting friction and wear during laying, dragging, and use; the protective coating makes the cable surface smoother, significantly reducing sliding friction resistance, reducing oil and dust adhesion, reducing wear caused by cleaning or external forces, and improving corrosion resistance; the reinforcing layer provides extremely high tensile strength, cut resistance, and flattening resistance, can withstand installation traction and heavy object pressure, and effectively prevents sharp objects from piercing, protecting the internal structure; the buffer layer is located between the inner sheath and the reinforcing layer, and its excellent elasticity, flexibility, tear resistance, and deformation recovery ability... It can effectively absorb the internal stress generated when the cable is bent, twisted or compressed; the double-layer shield and insulation layer work together to ensure uniform electric field distribution, prevent partial discharge and surface discharge, and improve long-term electrical stability; the non-hygroscopic filler rope and dense sheath structure, namely inner sheath, buffer layer, reinforcing layer, wear-resistant layer and protective coating, effectively prevent moisture intrusion; in summary, through multi-layer composite structure design and optimized material selection, significant improvements and balances are achieved in wear resistance, aging resistance, mechanical strength, flexibility, electrical performance and environmental adaptability, etc., making it especially suitable for power transmission occasions with harsh environments, frequent movement and bending, and high requirements for reliability and lifespan. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the armored cable for outdoor use according to this utility model.

[0018] Reference numerals: 1. Inner sheath; 2. Outer sheath; 3. Conductor; 4. Filler rope;

[0019] 21. Buffer layer; 22. Reinforcing layer; 23. Wear-resistant layer; 24. Protective coating;

[0020] 31. First shielding layer; 32. Insulation layer; 33. Second shielding layer. Detailed Implementation

[0021] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] like Figure 1 As shown, in this embodiment, a wear-resistant and aging-resistant power cable is provided, including an inner sheath 1, an outer sheath 2, and a conductor 3. The conductor 3 is provided in multiple groups, and the multiple groups of conductor 3 are located inside the inner sheath 1. The outer side of the conductor 3 is provided with a first shielding layer 31, an insulation layer 32, and a second shielding layer 33 in sequence. After the multiple groups of conductor 3 are cabled, filler ropes 4 are filled in the gaps between them. The outer sheath 2 includes a buffer layer 21, a reinforcing layer 22, and a wear-resistant layer 23 in sequence disposed outside the inner sheath 1, and a protective coating 24 is sprayed on the surface of the wear-resistant layer 23.

[0023] In this embodiment, conductor 3 is made of high-purity oxygen-free copper, which is formed by layering 200 fine copper wires with a diameter of 0.2 mm to form a fifth-class conductor 3, providing excellent flexibility and resistance to bending fatigue, and is especially suitable for moving or frequently bending applications.

[0024] In this embodiment, both the first shielding layer 31 and the second shielding layer 33 are made of cross-linked semi-conductive shielding material with a thickness of 0.8 mm. Cross-linked semi-conductive shielding material can provide better heat resistance and mechanical strength. The first shielding layer 31 is used to uniformly distribute the electric field on the surface of the conductor 3, prevent partial discharge, and protect the insulation layer 32. The second shielding layer 33 works together with the shielding layer of the conductor 3 to make the electric field uniformly distributed in the insulation layer 32, eliminate surface discharge, and improve long-term electrical stability.

[0025] In this embodiment, the insulation layer 32 is made of cross-linked polyethylene. Cross-linked polyethylene has extremely high heat resistance, excellent electrical insulation properties, good mechanical strength, chemical resistance, and resistance to environmental stress cracking. The cross-linking process significantly improves the mechanical strength and deformation resistance at high temperatures, which is key to ensuring that the cable resists thermal aging and environmental aging during long-term operation.

[0026] In this embodiment, the filler rope 4 is a non-hygroscopic filler rope, such as polypropylene (PP) rope, to ensure the roundness of the cable. The non-hygroscopic filler rope 4 does not absorb moisture, thus keeping the inside of the cable dry and preventing the decline in electrical performance caused by moisture intrusion. It has a low density, which can reduce the overall weight of the cable and facilitate installation and transportation. At the same time, the non-hygroscopic filler rope 4 has good high-frequency insulation performance, which can effectively isolate different conductors 3 inside the cable and reduce signal interference. It also has high tensile strength, temperature resistance, flame retardancy and other characteristics, and can maintain stable performance in harsh environments.

[0027] In this embodiment, the inner sheath 1 is made of high-performance polyvinyl chloride with a thickness of 1.0-1.4 mm. Polyvinyl chloride has good flame retardant properties, good mechanical strength, and good insulation properties. Moreover, its production cost is low, making it economical and practical. The inner sheath 1 is used to cover the inner conductor 3, providing a circular structure, buffering mechanical stress, isolating the conductor 3 from the outer sheath 2, preventing the conductor 3 from embedding into the outer sheath 2, and providing buffering and basic protection.

[0028] In this embodiment, the buffer layer 21 is made of thermoplastic polyurethane, 0.3-0.8 mm thick. Thermoplastic polyurethane has good elasticity and flexibility, and can quickly return to its original shape after being subjected to force. It also has high strength and toughness as well as good tear resistance, and can withstand large tensile and compressive forces. It can still maintain its flexibility at low temperatures, and also has certain high temperature resistance, making it suitable for applications in different temperature ranges. This flexible material can absorb the internal stress when the cable is bent or twisted, and prevent external forces from being transmitted to the insulation layer 32 and damaging the internal conductor 3.

[0029] In this embodiment, the reinforcing layer 22 is made of a mixture of aramid fiber and high-modulus polyethylene fiber in a ratio of 7:3, with a thickness of 0.4-0.6mm. It combines the ultra-high strength of aramid fiber with the wear resistance and cut resistance of high-modulus polyethylene fiber, and can withstand the axial tension during installation and use, preventing the cable from being flattened by heavy objects and causing insulation damage. At the same time, the high-density braided layer can prevent sharp objects from puncturing it.

[0030] In this embodiment, the wear-resistant layer 23 is made of polyurethane elastomer, with added nano-ceramic particles and UV absorbers. The addition of nano-ceramic particles improves surface hardness and wear resistance, while the UV absorbers absorb ultraviolet light, enhancing aging resistance. Polyurethane elastomer is a type of polyurethane synthetic material. Due to its structure having both soft and hard chain segments, it can be molecularly designed to impart excellent properties such as high strength, good toughness, wear resistance, and oil resistance. It possesses both the high elasticity of rubber and the rigidity of plastics, offering a wide range of adjustable properties and superior wear resistance.

[0031] In this embodiment, the protective coating 24 is a silicone nano-coating, which can reduce oil and dust adhesion, reduce cleaning wear, make the surface smoother, reduce sliding friction resistance by more than 30%, and also has good corrosion resistance to improve the service life of the cable.

[0032] The wear-resistant and aging-resistant power cable provided by this utility model has the following advantages: the wear-resistant layer 23 significantly improves the hardness and wear resistance of the cable surface, effectively resisting friction and wear during laying, dragging, and use; the protective coating 24 makes the cable surface smoother, significantly reducing sliding friction resistance, reducing oil and dust adhesion, reducing wear caused by cleaning or external force, and improving corrosion resistance; the reinforcing layer 22 provides extremely high tensile strength, cut resistance, and flattening resistance, can withstand installation traction and heavy object pressure, and effectively prevents puncture by sharp objects, protecting the internal structure; the buffer layer 21 is located between the inner sheath 1 and the reinforcing layer 22, and has excellent elasticity, flexibility, tear resistance, and deformation recovery ability. It can effectively absorb the internal stress generated when the cable is bent, twisted or compressed; the double-layer shield and insulation layer 32 work together to ensure uniform electric field distribution, prevent partial discharge and surface discharge, and improve long-term electrical stability; the non-hygroscopic filler rope 4 and the dense sheath structure, namely the inner sheath 1, buffer layer 21, reinforcing layer 22, wear-resistant layer 23 and protective coating 24, effectively prevent moisture intrusion; in summary, through multi-layer composite structure design and optimized material selection, significant improvements and balances are achieved in wear resistance, aging resistance, mechanical strength, flexibility, electrical performance and environmental adaptability, etc., which are especially suitable for power transmission occasions with harsh environments, frequent movement and bending, and high requirements for reliability and lifespan.

[0033] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wear-resistant and aging-resistant power cable, characterized in that: The device includes an inner sheath (1), an outer sheath (2), and a conductor (3). The conductor (3) is provided in multiple sets, and the multiple sets of conductors (3) are located inside the inner sheath (1). The outer side of the conductor (3) is provided with a first shielding layer (31), an insulation layer (32), and a second shielding layer (33) in sequence. After the multiple sets of conductors (3) are cabled, filler ropes (4) are filled in the gaps between them. The outer sheath (2) includes a buffer layer (21), a reinforcing layer (22), and a wear-resistant layer (23) in sequence arranged outside the inner sheath (1), and a protective coating (24) is sprayed on the surface of the wear-resistant layer (23).

2. The wear-resistant and aging-resistant power cable according to claim 1, characterized in that: Both the first shielding layer (31) and the second shielding layer (33) are made of cross-linked semi-conductive shielding material with a thickness of 0.8 mm.

3. The wear-resistant and aging-resistant power cable according to claim 1, characterized in that: The insulating layer (32) is made of cross-linked polyethylene.

4. The wear-resistant and aging-resistant power cable according to claim 1, characterized in that: The filling rope (4) is a non-hygroscopic filling rope (4).

5. The wear-resistant and aging-resistant power cable according to claim 1, characterized in that: The inner sheath (1) is made of high-performance polyvinyl chloride with a thickness of 1.0-1.4 mm.

6. The wear-resistant and aging-resistant power cable according to claim 1, characterized in that: The buffer layer (21) is made of thermoplastic polyurethane, 0.3-0.8 mm thick.

7. The wear-resistant and aging-resistant power cable according to claim 1, characterized in that: The protective coating (24) is a silicone nano-coating.

8. The wear-resistant and aging-resistant power cable according to claim 1, characterized in that: The conductor (3) is made of high-purity oxygen-free copper.

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