Anti-aging cable with long service life

Abstract

The utility model relates to the technical field of cables, and discloses a long-life anti-aging cable, which comprises conductor core wires, an inner insulating layer, a shielding layer, a buffer layer, an anti-aging filling layer, an insulating reinforcing layer, an anti-oxidation outer sheath, a reinforcing fiber layer, a thermal barrier tape, an anti-corrosion coating, a waterproof isolating membrane and an outer sheath which are arranged from inside to outside. The conductor core wire is located at the axis position of the cable and wrapped by the inner insulating layer, and the shielding layer and the buffer layer are wound outside the inner insulating layer. An anti-aging filling layer is arranged on the outer side of the buffer layer and made of modified ethylene propylene diene monomer. According to the utility model, the inner insulating layer, the shielding layer, the buffer layer and the modified ethylene propylene diene monomer aging-resistant filling layer are sequentially arranged outside the conductor, and the double protection of the insulating reinforcing layer and the anti-oxidation outer sheath is matched, so that the anti-oxidation, anti-crack and mechanical properties of the cable are remarkably improved; the structure enables the cable to operate stably in severe environments such as humid and high temperature, and the service life can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a long-life, aging-resistant cable. Background Technology

[0002] With the widespread development of industrial equipment, energy engineering, and urban infrastructure, cables play a vital role in long-distance power transmission, underground laying, and in complex climates and highly corrosive environments. Especially in areas with high temperature, high humidity, salt spray, and strong ultraviolet radiation, the service life and performance stability of cables become key factors in ensuring the safe and economical operation of systems. Therefore, developing a cable product with excellent aging resistance and long service life has become an important direction in current cable technology research and engineering applications.

[0003] Existing cable structures typically employ a standard combination of conductor cores, insulation layers, and an outer sheath. The inner layer is often made of conventional insulation materials such as polyvinyl chloride (PVC) and polyethylene (PE). While these materials provide some insulation and protection during short-term use, they are prone to aging, cracking, or deterioration in insulation performance when exposed to high temperatures, strong light, humidity, or acidic / alkaline environments over extended periods. Furthermore, traditional cables lack structural resistance to mechanical shock and multi-layered protection, making it difficult to meet the safety requirements of long-term operation under complex conditions.

[0004] Especially in terms of aging resistance, existing technologies struggle to balance flexibility, heat resistance, and oxidation resistance. Their simple structural layers and weak protection mechanisms lead to rapid aging and short service life of cables in harsh environments, resulting in frequent replacements and high maintenance costs. This severely restricts their widespread application in demanding applications. Therefore, a high-lifespan, aging-resistant cable is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a high-life, aging-resistant cable, aiming to improve the deficiencies of traditional cables in terms of structural resistance to mechanical impact and multi-layered protection design, which makes it difficult to meet the long-term operational safety requirements under complex working conditions.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-life, aging-resistant cable, comprising, from the inside out, a conductor core, an inner insulation layer, a shielding layer, a buffer layer, an aging-resistant filling layer, an insulation reinforcement layer, an anti-oxidation outer sheath, a reinforcing fiber layer, a heat-barrier strip, an anti-corrosion coating, a waterproof isolation membrane, and an outer sheath.

[0007] The conductor core is located at the center of the cable axis and is wrapped with an inner insulation layer. A shielding layer and a buffer layer are wrapped around the outside of the inner insulation layer.

[0008] Furthermore, the buffer layer is provided with an aging-resistant filling layer on the outside. The aging-resistant filling layer is made of modified EPDM rubber to improve its aging life and crack resistance. The aging-resistant filling layer is wrapped with an insulating reinforcement layer and an anti-oxidation outer sheath in sequence.

[0009] Furthermore, the antioxidant outer sheath is made of nano-grade polyvinyl chloride composite material to extend the service life of the cable in high temperature and high humidity environments. The antioxidant outer sheath is wrapped with a reinforcing fiber layer to enhance the overall tensile strength of the cable.

[0010] Furthermore, the reinforcing fiber layer is woven from high-modulus aramid fibers to enhance the overall structural resistance to deformation. A heat-barrier strip is provided on the outside of the reinforcing fiber layer to prevent high temperatures from penetrating into the cable.

[0011] Furthermore, the heat barrier tape adopts a ceramic fiber paper laminate structure, which has excellent heat reflection and heat conduction suppression capabilities. The outer side of the heat barrier tape is provided with an anti-corrosion coating to inhibit the corrosion of the cable by the external acid and alkaline environment.

[0012] Furthermore, the anti-corrosion coating is a silicone coating with a thickness of 0.2-0.5 mm, which effectively prevents chemical corrosion, and a waterproof isolation membrane is wrapped around the outside of the anti-corrosion coating.

[0013] Furthermore, the waterproof isolation membrane adopts a multi-layer polyamide membrane structure, which has excellent moisture resistance and sealing performance. An outer protective layer is provided on the outside of the waterproof isolation membrane for overall protection of the cable structure.

[0014] Furthermore, the outer protective layer is made of weather-resistant polyolefin material, which has properties such as UV resistance and resistance to high and low temperature alternation, and is suitable for long-term outdoor laying.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, by sequentially setting a multi-layer composite functional structure around the conductor core, including an inner insulation layer, a shielding layer, a buffer layer, and an aging-resistant filling layer, the aging resistance and mechanical damage resistance of the cable are significantly improved while ensuring the stability of the basic electrical performance of the cable. Among them, the aging-resistant filling layer is made of modified EPDM rubber, which has excellent anti-oxidation and anti-cracking properties, delaying the physical degradation process of the material over time, and is particularly suitable for long-term laying in harsh environments. In addition, the double-covering structure of the insulation reinforcement layer and the anti-oxidation outer sheath effectively improves the cable's safe and stable operation in humid, high-temperature, and high-salt-spray environments, thereby greatly extending the overall service life of the cable.

[0017] 2. In this utility model, the outermost layer of the structure comprises a reinforcing fiber layer, a heat-barrier strip, an anti-corrosion coating, a waterproof isolation membrane, and an outer sheath, forming a stable barrier system through these five layers of external protection. The reinforcing fiber layer utilizes aramid braiding technology to effectively improve the cable's tensile and compressive strength; the heat-barrier strip, based on a ceramic fiber laminate structure, effectively blocks external high-temperature heat sources; the anti-corrosion coating and the waterproof isolation membrane work together to resist external chemical erosion and humidity effects; finally, the weather-resistant outer sheath provides comprehensive structural coverage, exhibiting excellent UV resistance and climate adaptability. This layered protection structure makes the cable safer and more reliable in complex outdoor environments. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a high-life, aging-resistant cable proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the inner insulation layer structure of a high-life, aging-resistant cable proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the reinforcing fiber layer structure of a high-life, aging-resistant cable proposed in this utility model.

[0021] Legend:

[0022] 1. Conductor core wire; 2. Inner insulation layer; 3. Shielding layer; 4. Buffer layer; 5. Aging-resistant filler layer; 6. Insulation reinforcement; 7. Anti-oxidation outer sheath; 8. Reinforcing fiber layer; 9. Heat barrier tape; 10. Anti-corrosion coating; 11. Waterproof isolation membrane; 12. Outer sheath. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figure 1 , Figure 2 and Figure 3 The present invention provides an embodiment of a high-life, aging-resistant cable, comprising, from the inside out, a conductor core 1, an inner insulation layer 2, a shielding layer 3, a buffer layer 4, an aging-resistant filling layer 5, an insulation reinforcement layer 6, an anti-oxidation outer sheath 7, a reinforcing fiber layer 8, a heat-barrier strip 9, an anti-corrosion coating 10, a waterproof isolation membrane 11, and an outer sheath 12.

[0025] The conductor core 1 is located at the cable axis and serves as the core for current transmission. It is wrapped with an inner insulation layer 2, made of cross-linked polyethylene, providing basic insulation protection. A shielding layer 3 and a buffer layer 4 are wound around the inner insulation layer 2. The shielding layer 3 is a copper wire braided structure, effectively suppressing electromagnetic interference. The buffer layer 4 is made of foamed polyethylene, absorbing mechanical stress. An aging-resistant filler layer 5 is located outside the buffer layer 4, made of modified EPDM rubber to improve its aging life and crack resistance. An insulation reinforcement layer 6 and an anti-oxidation outer sheath 7 are sequentially wrapped around the aging-resistant filler layer 5. The insulation reinforcement layer 6 is a mica tape wrapping structure, improving insulation performance. The anti-oxidation outer sheath 7 is made of nano-grade polyvinyl chloride composite material to extend the cable's service life in high-temperature and high-humidity environments. A reinforcing fiber layer 8 is wound around the anti-oxidation outer sheath 7 to enhance the overall tensile strength of the cable. Tensile strength; the reinforcing fiber layer 8 is made of high-modulus aramid fiber weaving, which enhances the overall structural resistance to deformation; a heat barrier strip 9 is set on the outside of the reinforcing fiber layer 8 to prevent high temperature from penetrating into the cable; the heat barrier strip 9 adopts a ceramic fiber paper laminate structure, which has excellent heat reflection and thermal conductivity suppression capabilities; an anti-corrosion coating 10 is set on the outside of the heat barrier strip 9 to inhibit the corrosion of the cable by external acid and alkali environments; the anti-corrosion coating 10 is a silicone coating with a thickness of 0.2-0.5mm, which effectively prevents chemical corrosion; a waterproof isolation membrane 11 is wrapped around the outside of the anti-corrosion coating 10; the waterproof isolation membrane 11 adopts a multi-layer polyamide membrane structure, which has excellent moisture resistance and sealing performance; an outer sheath 12 is set on the outside of the waterproof isolation membrane 11 to protect the overall cable structure; the outer sheath 12 is made of weather-resistant polyolefin material, which has properties such as UV resistance and resistance to high and low temperature alternation, and is suitable for long-term outdoor laying.

[0026] Specifically, the cable achieves all-round protection through a multi-layer composite structure design; the inner insulation layer 2 and the insulation reinforcement layer 6 provide double insulation protection; the shielding layer 3 suppresses electromagnetic interference; the buffer layer 4 absorbs mechanical stress; the aging-resistant filling layer 5 and the anti-oxidation outer sheath 7 enhance weather resistance; the reinforcing fiber layer 8 ensures mechanical strength; the heat barrier strip 9 prevents heat conduction; the anti-corrosion coating 10 and the waterproof isolation membrane 11 resist chemical corrosion and moisture penetration; and the outer sheath 12 provides final protection. This design significantly improves the cable's service life in harsh environments and has excellent electrical performance, mechanical strength, and aging resistance.

[0027] Working Principle: When this cable is needed, electrical signals are transmitted with the conductor core 1 as the center. The outer inner insulation layer 2 provides electrical insulation to prevent electric shock and current leakage. The shielding layer 3 suppresses electromagnetic interference to ensure stable signal transmission. The buffer layer 4 absorbs external impacts to avoid mechanical damage. The aging-resistant filler layer 5, made of modified EPDM rubber, serves as the main aging protection material, enhancing the cable's resistance to high temperatures, ultraviolet radiation, and oxidation. The insulation reinforcement layer 6 and the anti-oxidation outer sheath 7 provide double-layer reinforcement, effectively improving resistance to external corrosion. The subsequently wound reinforcing fiber layer 8 provides the cable with overall tensile and compressive strength, ensuring that the structure does not deform during dragging or burial. The heat barrier tape 9 acts as a heat insulation component, preventing high temperatures from entering the interior and damaging the insulation structure. The outermost layers are, in sequence, an anti-corrosion coating 10, a waterproof isolation membrane 11, and an outer sheath 12, forming a complete sealed protection system that effectively prevents water vapor, acid and alkali substances, and ultraviolet radiation from corroding the cable, ensuring stable use in harsh environments such as outdoors, underground, and in humid conditions, achieving the goal of long service life.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-life, aging-resistant cable, characterized in that, It includes, from the inside out, a conductor core (1), an inner insulation layer (2), a shielding layer (3), a buffer layer (4), an aging-resistant filling layer (5), an insulation reinforcement layer (6), an anti-oxidation outer sheath (7), a reinforcing fiber layer (8), a heat-barrier strip (9), an anti-corrosion coating (10), a waterproof isolation membrane (11), and an outer sheath (12). The conductor core (1) is located at the center of the cable axis and is wrapped with an inner insulation layer (2). The inner insulation layer (2) is wrapped with a shielding layer (3) and a buffer layer (4).

2. The high-life, aging-resistant cable according to claim 1, characterized in that: The buffer layer (4) is provided with an aging-resistant filling layer (5) on the outside. The aging-resistant filling layer (5) is made of modified EPDM rubber to improve its aging life and crack resistance. The aging-resistant filling layer (5) is wrapped with an insulating reinforcing layer (6) and an anti-oxidation outer sheath (7) in sequence.

3. The high-life, aging-resistant cable according to claim 2, characterized in that: The antioxidant outer sheath (7) is made of nano-grade polyvinyl chloride composite material to extend the service life of the cable in high temperature and high humidity environment. The antioxidant outer sheath (7) is wrapped with a reinforcing fiber layer (8) to enhance the overall tensile strength of the cable.

4. The high-life, aging-resistant cable according to claim 3, characterized in that: The reinforcing fiber layer (8) is made of high modulus aramid fiber weaving to enhance the overall structural resistance to deformation. A heat barrier strip (9) is provided on the outside of the reinforcing fiber layer (8) to prevent high temperature from penetrating into the cable.

5. A high-life, aging-resistant cable according to claim 4, characterized in that: The heat barrier strip (9) adopts a ceramic fiber paper laminate structure, which has excellent heat reflection and heat conduction suppression capabilities. The outer side of the heat barrier strip (9) is provided with an anti-corrosion coating (10) to suppress the corrosion of the cable by the external acid and alkali environment.

6. A high-life, aging-resistant cable according to claim 5, characterized in that: The anti-corrosion coating (10) is a silicone coating with a thickness of 0.2-0.5 mm, which effectively prevents chemical corrosion. The anti-corrosion coating (10) is wrapped with a waterproof isolation membrane (11) on the outside.

7. A high-life, aging-resistant cable according to claim 6, characterized in that: The waterproof isolation membrane (11) adopts a multi-layer polyamide membrane structure, which has excellent moisture resistance and sealing performance. An outer protective layer (12) is provided on the outside of the waterproof isolation membrane (11) for overall protection of the cable structure.

8. A high-life, aging-resistant cable according to claim 7, characterized in that: The outer protective layer (12) is made of weather-resistant polyolefin material, which has the properties of UV resistance and high and low temperature alternation resistance, and is suitable for long-term outdoor laying.

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