Marine anti-interference variable-frequency low-voltage power cable

Abstract

The utility model provides an anti-interference variable-frequency low-voltage power cable for a ship. The anti-interference variable-frequency low-voltage power cable comprises a plurality of main wire cores, a plurality of auxiliary wire cores, an anti-interference assembly and a protection structure layer. The insulating shielding layer, the inner waterproof layer and the inner corrosion-resistant layer are wrapped outside the main wire cores and the auxiliary wire cores, so that the insulating, waterproof and corrosion-resistant characteristics of the cable are effectively enhanced. The anti-interference assembly comprises a central core body, an annular elastic ring, a plurality of supporting columns and an annular outer shielding layer, and the cable can effectively absorb and buffer mechanical vibration through the arrangement of the central core body, the annular elastic ring and the supporting columns, and meanwhile, the annular outer shielding layer is stably supported; therefore, the anti-interference capability, the extrusion resistance capability and the tensile strength capability of the cable are improved. And the protection structure layer comprises an insulating layer, an outer waterproof layer, a metal shielding layer, an anti-corrosion layer and a wear-resistant outer sheath, so that the weather resistance, the water resistance, the corrosion resistance and the wear resistance of the cable in a complex marine environment are further improved, and efficient and stable operation of the cable in practical application is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a ship-used anti-interference variable-frequency low-voltage power cable. Background Art

[0002] With the continuous development of the shipbuilding industry and the growing demand for electricity, marine cables are key components for ship power and signal transmission, and their performance and reliability are crucial to the safe and stable operation of ships. Especially in modern ships, variable frequency motors and inverters are widely used to achieve precise control of power and signals to improve automation and production efficiency. However, this advanced electrical system also brings complex electromagnetic environment and higher anti-interference requirements.

[0003] Traditional marine cables often have difficulty effectively isolating external electromagnetic interference and noise when facing high-frequency signals generated by variable-frequency motors and inverters, resulting in a decrease in the stability of power transmission and signal transmission, which in turn affects the overall operating performance of the ship. Especially in the marine environment, complex conditions such as salt spray corrosion, mechanical vibration, and electromagnetic interference between shipboard equipment place more stringent requirements on the weather resistance, waterproofness, corrosion resistance, and anti-interference of cables. Therefore, the development of a marine variable-frequency low-voltage power cable with excellent anti-interference performance is of great significance for improving the stability, reliability, and safety of ship power and signal transmission. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides a ship-based anti-interference variable frequency low-voltage power cable, which solves the problem that some cables in the existing technology are difficult to effectively isolate external electromagnetic interference. At the same time, it also improves the cable's weather resistance, waterproofness, corrosion resistance and anti-interference properties, ensuring the stability and reliability of power transmission and signal transmission in complex marine environments.

[0005] A ship-use anti-interference variable frequency low-voltage power cable comprises a plurality of main cores, a plurality of auxiliary cores, an anti-interference component and a protective structure layer; each of the main cores and the auxiliary cores comprises a conductor and an insulating shielding layer, an inner waterproof layer and an inner corrosion-resistant layer coated on the outer side of the conductor; the anti-interference component comprises a central core, an annular elastic ring, a plurality of support columns and an annular outer shielding layer; the central core is arranged at the center of the cable, the annular elastic ring is arranged in an annular manner on the outer side of the main core and the auxiliary core, the annular outer shielding layer is bonded to the outer side of the annular elastic ring, the support columns are arranged at intervals on the inner side of the annular elastic ring, the support columns are located in the gap between the main core and the auxiliary core, and the side of the support columns away from the annular elastic ring is arranged in an arc shape, the protective structure layer is coated on the outer side of the annular outer shielding layer, and comprises an insulating layer, an outer waterproof layer, a metal shielding layer, an anti-corrosion layer and a wear-resistant outer sheath arranged from the inside to the outside.

[0006] Preferably, the central core is a cylindrical central core, and the radius of the central core is the same as the radius of the arc of the support column. When the cable is squeezed externally, the support column will tightly press against the central core, providing effective support and buffering, thereby enhancing the compression resistance and structural stability of the cable. At the same time, it can also ensure the stability of the annular elastic ring and the annular outer shielding layer, further improve the anti-interference performance and mechanical vibration resistance of the cable, and adapt to complex marine environments.

[0007] Preferably, the central core, the annular elastic ring and the support column are made of thermoplastic polyurethane material or cross-linked polyethylene material.

[0008] Preferably, the secondary core is a fan-shaped secondary core.

[0009] Preferably, the annular elastic ring is filled with an anti-interference filler.

[0010] Preferably, the number of the main cores and the number of the secondary cores are both 3.

[0011] Preferably, the outer surface of the wear-resistant outer sheath is provided with a concave cambered surface.

[0012] Preferably, the cross-section of the metal shielding layer is configured to be formed by connecting a plurality of arcs end to end, and the outer waterproof layer is configured to be water-blocking powder.

[0013] Preferably, a flexible extrusion layer is provided between the anti-corrosion layer and the wear-resistant outer sheath.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model provides a marine anti-interference variable frequency low-voltage power cable, comprising a plurality of main cores, a plurality of auxiliary cores, an anti-interference component and a protective structure layer, which improves the anti-interference ability and overall performance of the cable. The main core and the auxiliary core are coated with an insulating shielding layer, an inner waterproof layer and an inner corrosion-resistant layer, which effectively enhances the insulation, waterproof and corrosion-resistant properties of the cable. The anti-interference component comprises a central core, an annular elastic ring, a plurality of support columns and an annular outer shielding layer. The central core, the annular elastic ring and the support column are arranged so that the cable can effectively absorb and buffer mechanical vibrations, and the annular outer shielding layer can also be stably supported, thereby improving the anti-interference, extrusion resistance and tensile strength of the cable. The protective structure layer comprises an insulating layer, an outer waterproof layer, a metal shielding layer, an anti-corrosion layer and a wear-resistant outer sheath, which further improves the weather resistance, waterproofness, corrosion resistance and abrasion resistance of the cable in a complex marine environment, and ensures the efficient and stable operation of the cable in practical applications. Therefore, the marine anti-interference variable frequency low-voltage power cable not only improves the electromagnetic shielding performance of the cable, but also increases the mechanical strength and stability of the cable, meeting the high standards for power and signal transmission on modern ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic diagram of the cross-sectional structure of the ship's anti-interference variable frequency low-voltage power cable.

[0017] in:

[0018] 10-main line core, 20-auxiliary line core, 30-anti-interference component, 40-protective structure layer, 11-conductor, 12-insulating shielding layer, 13-inner waterproof layer, 14-inner corrosion-resistant layer, 31-center core, 32-annular elastic ring, 33-support column, 34-annular outer shielding layer, 35-arc, 41-insulating layer, 42-outer waterproof layer, 43-metal shielding layer, 44-corrosion-resistant layer, 45-wear-resistant outer sheath, 46-anti-interference filler, 47-concave arc surface. DETAILED DESCRIPTION

[0019] The embodiments described below are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1The present embodiment provides a ship-use anti-interference variable frequency low-voltage power cable, which comprises a plurality of main cores 10, a plurality of auxiliary cores 20, an anti-interference component 30 and a protective structure layer 40; each of the main cores 10 and the auxiliary cores 20 comprises a conductor 11 and an insulating shielding layer 12, an inner waterproof layer 13 and an inner corrosion-resistant layer 14 wrapped around the outer side of the conductor 11; the anti-interference component 30 comprises a central core 31, an annular elastic ring 32, a plurality of support columns 33 and an annular outer shielding layer 34; the central core 31 is arranged at the center of the cable, and the annular elastic ring 32 is arranged in an annular manner at The annular outer shielding layer 34 is bonded to the outer side of the annular elastic ring 32 on the outside of the main core 10 and the auxiliary core 20, and the support column 33 is arranged at intervals on the inner side of the annular elastic ring 32. The support column 33 is located in the gap between the main core 10 and the auxiliary core 20, and the side of the support column 33 away from the annular elastic ring 32 is arranged in an arc shape 35. The protective structure layer 40 is coated on the outer side of the annular outer shielding layer 34, and includes an insulating layer 41, an outer waterproof layer 42, a metal shielding layer 43, an anti-corrosion layer 44 and a wear-resistant outer sheath 45 arranged from the inside to the outside.

[0021] Preferably, the central core 31 is a cylindrical central core 31, and the radius of the central core 31 is the same as the radius of the arc 35 of the support column 33. When the cable is squeezed externally, the support column 33 will tightly press against the central core 31, providing effective support and buffering, thereby enhancing the compression resistance and structural stability of the cable. At the same time, it can also ensure the stability of the annular elastic ring 32 and the annular outer shielding layer 34, further improve the anti-interference performance and mechanical vibration resistance of the cable, and adapt to complex marine environments.

[0022] Preferably, the central core 31, the annular elastic ring 32 and the support column 33 are made of thermoplastic polyurethane material or cross-linked polyethylene material. This makes the central core 31, the annular elastic ring 32 and the support column 33 have excellent mechanical properties and durability, can effectively support the cable structure, enhance its anti-extrusion and tensile strength, and significantly extend the service life of the cable. Secondly, the better bonding of the annular outer shielding layer 34 makes the cable have excellent anti-interference performance, can effectively isolate external electromagnetic interference, ensure the stable operation of the cable in a complex electromagnetic environment, and improve the reliability of power and signal transmission. In addition, it also has excellent weather resistance and environmental adaptability, can resist salt spray corrosion in the marine environment, and maintain the long-term stable performance of the cable.

[0023] Preferably, the secondary core 20 is a fan-shaped secondary core 20. The use of the fan-shaped secondary core 20 allows the diameter of the cable to be reduced by 5%-15% compared to the traditional cable using a round secondary core 20. The reduction in cable diameter reduces the space requirement for cable installation and wiring, especially in limited space environments such as ships, which allows for more flexible arrangement and installation of cables, reducing the complexity and cost of the wiring process. Secondly, the reduced diameter means a lighter cable structure, which reduces the overall weight, reduces the burden on ship transportation and operation, and improves the efficiency of cable handling and installation. In addition, due to the design of the fan-shaped secondary core 20, the mechanical strength and flexibility of the cable are enhanced, making it easier to adapt to complex installation environments and mechanical stresses, thereby improving the durability and service life of the cable.

[0024] Preferably, the annular elastic ring 32 is filled with an anti-interference filler 46. The anti-interference filler 46 described in the present application is a graphene anti-interference filler 46, which has excellent conductivity and electromagnetic shielding performance, can effectively absorb and suppress high-frequency electromagnetic interference, and reduce electromagnetic noise inside the cable. Therefore, its setting in the annular elastic ring 32 not only improves the anti-interference ability of the cable, ensures the stability and reliability of signal transmission, but also helps to improve the performance of the cable in a complex electromagnetic environment.

[0025] Preferably, the number of the main cores 10 and the number of the secondary cores 20 are both 3. Therefore, the number of the support columns 33 is also set to 3.

[0026] Preferably, the outer surface of the wear-resistant outer sheath 45 is provided with a concave arc surface 47. The concave arc surface 47 can increase the friction between the cable and the external contact surface, and improve the anti-slip performance of the cable.

[0027] Preferably, the cross section of the metal shielding layer 43 is configured to be formed by connecting multiple arcs end to end, and the outer waterproof layer 42 is configured to be water-blocking powder. The metal shielding layer 43 connected end to end in an arc increases the contact area and coverage, effectively improving the cable's ability to block external electromagnetic interference, thereby reducing interference noise in signal transmission and ensuring the stability and reliability of power and signal transmission. At the same time, the use of water-blocking powder as the outer waterproof layer 42 enables it to be more tightly attached to the metal shielding layer 43 connected end to end in an arc, effectively preventing the intrusion of water and moisture, and significantly improving the cable's water resistance and corrosion resistance in wet and humid environments.

[0028] Preferably, a flexible extrusion layer is provided between the anti-corrosion layer 44 and the wear-resistant outer sheath 45. The flexible extrusion layer has excellent elasticity and softness, and can effectively absorb and disperse external forces to prevent them from being directly transmitted to the core structure and sheath layer of the cable, thereby improving the wear resistance and fatigue resistance of the cable. At the same time, when the cable is frequently moved or subjected to mechanical friction, the flexible extrusion layer can effectively reduce the wear of the cable surface by the external environment, protect the anti-corrosion layer 44 and the wear-resistant outer sheath 45 from external physical factors, and ensure the stability and reliability of the cable in long-term use.

[0029] The utility model provides a ship-use anti-interference variable frequency low-voltage power cable, comprising a plurality of main cores 10, a plurality of auxiliary cores 20, an anti-interference component 30 and a protective structure layer 40, which improves the anti-interference ability and overall performance of the cable. The main core 10 and the auxiliary core 20 are coated with an insulating shielding layer 12, an inner waterproof layer 13 and an inner corrosion-resistant layer 14, which effectively enhances the insulation, waterproof and corrosion-resistant properties of the cable. The anti-interference component 30 comprises a central core 31, an annular elastic ring 32, a plurality of support columns 33 and an annular outer shielding layer 34. The arrangement of the central core 31, the annular elastic ring 32 and the support column 33 enables the cable to effectively absorb and buffer mechanical vibrations, and also enables the annular outer shielding layer 34 to be stably supported, thereby improving the anti-interference, extrusion resistance and tensile strength capabilities of the cable. The protective structure layer 40 includes an insulating layer 41, an outer waterproof layer 42, a metal shielding layer 43, an anti-corrosion layer 44 and a wear-resistant outer sheath 45, which further improves the weather resistance, waterproofness, corrosion resistance and abrasion resistance of the cable in a complex marine environment, ensuring the efficient and stable operation of the cable in practical applications. Therefore, the marine anti-interference variable frequency low-voltage power cable not only improves the electromagnetic shielding performance of the cable, but also increases the mechanical strength and stability of the cable, meeting the high standard requirements of modern ship power and signal transmission.

[0030] The above disclosures are only several preferred embodiments of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A marine anti-interference variable frequency low-voltage power cable, characterized in that: It comprises a plurality of main cores, a plurality of auxiliary cores, an anti-interference component and a protective structure layer; each of the main cores and the auxiliary cores comprises a conductor and an insulating shielding layer, an inner waterproof layer and an inner corrosion-resistant layer coated on the outer side of the conductor; the anti-interference component comprises a central core, an annular elastic ring, a plurality of support columns and an annular outer shielding layer; the central core is arranged at the center of the cable, the annular elastic ring is arranged in an annular shape on the outer side of the main core and the auxiliary core, the annular outer shielding layer is bonded to the outer side of the annular elastic ring, the support columns are arranged at intervals on the inner side of the annular elastic ring, the support columns are located in the gap between the main core and the auxiliary core, and the side of the support columns away from the annular elastic ring is arranged in an arc shape, the protective structure layer is coated on the outer side of the annular outer shielding layer, and comprises an insulating layer, an outer waterproof layer, a metal shielding layer, an anti-corrosion layer and a wear-resistant outer sheath arranged from the inside to the outside.

2. The ship-use anti-interference variable frequency low-voltage power cable according to claim 1, characterized in that: The central core is a cylindrical central core, and the radius of the central core is the same as the radius of the arc of the support column.

3. The ship-use anti-interference variable frequency low-voltage power cable according to claim 1, characterized in that: The central core, the annular elastic ring and the support column are made of thermoplastic polyurethane material or cross-linked polyethylene material.

4. The ship-use anti-interference variable frequency low-voltage power cable according to claim 1, characterized in that: The secondary core is a fan-shaped secondary core.

5. The ship-use anti-interference variable frequency low-voltage power cable according to claim 1, characterized in that: The annular elastic ring is filled with anti-interference filler.

6. The ship-use anti-interference variable frequency low-voltage power cable according to claim 1, characterized in that: The number of the main cores and the number of the secondary cores are both 3.

7. The ship-use anti-interference variable frequency low-voltage power cable according to claim 1, characterized in that: The outer surface of the wear-resistant outer sheath is provided with a concave cambered surface.

8. The ship-use anti-interference variable frequency low-voltage power cable according to claim 1, characterized in that: The cross section of the metal shielding layer is configured to be formed by connecting a plurality of arcs end to end, and the outer waterproof layer is configured to be water-blocking powder.

9. The ship-use anti-interference variable frequency low-voltage power cable according to claim 1, characterized in that: A flexible extrusion layer is arranged between the anti-corrosion layer and the wear-resistant outer sheath.

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