A kind of rare earth aluminum alloy device special coaxial cable with rated voltage 0.6 / 1KV

Abstract

This invention relates to a rare-earth aluminum alloy coaxial cable for equipment with a rated voltage of 0.6 / 1KV. It includes an inner conductor, an inner insulation layer structure, an outer sheath, an outer conductor, and a filler layer structure. The inner conductor is a rare-earth aluminum alloy conductor. The inner insulation layer structure consists of a first inner insulation layer and a second inner insulation layer located outside the inner conductor, with a shielding layer between the first and second inner insulation layers. Silicon carbide rare-earth aluminum alloy monofilaments are wound around the inner conductor. This cable forms the inner and outer conductors by twisting silicon carbide rare-earth aluminum alloy monofilaments wound around the inner conductor, and a second independent stranded unit is formed in the outer conductor by unidirectional winding. This allows the outer conductor to have high tensile strength and adapt to bending requirements. It meets the high-voltage pulse power technology requirements of equipment and can satisfy instantaneous current carrying capacity of hundreds of thousands of amperes. It increases the high-temperature strength and creep resistance of the aluminum alloy, improving the thermal stability, strength, and heat resistance of the aluminum alloy cable.

Description

Technical Field

[0001] This invention relates to the field of coaxial cables, and in particular to a rare earth aluminum alloy coaxial cable with a rated voltage of 0.6 / 1KV specifically for equipment. Background Technology

[0002] Currently, due to copper's excellent electrical properties, domestic cables generally use copper as the conductor. However, copper is much more expensive than aluminum. Many researchers have been developing aluminum to replace copper in order to achieve more optimized resource utilization. However, ordinary aluminum core cables have poor mechanical properties and corrosion resistance, while rare earth aluminum alloy conductors have creep resistance, high flexibility, strong ductility, and low rebound characteristics. Under the same current carrying capacity, with the increasing demand for cables in my country, using rare earth aluminum alloy conductor cables to replace copper conductor cables has the benefits of reducing material costs and optimizing resource utilization, meeting the needs of my country's power construction. At present, ordinary aluminum alloy conductor cables have poor overall impact resistance and heat dissipation performance, and there is a risk of fire due to high temperature during cable use.

[0003] The production process of new rare earth aluminum alloy cables is complex, requiring meticulous and rigorous control at each stage. Rare metals and rare earth elements are expensive, and their extraction and processing present significant technical challenges and costs. Due to the high cost, the selling price is also relatively high, and market promotion and awareness need to be addressed. The technical standards and specifications for new rare earth aluminum alloy cables also need improvement, and issues such as the installation, wiring, and maintenance procedures for the finished cables need to be resolved. Furthermore, the shielding copper wire of the signal core wraps the two sets of signal cores together, causing electromagnetic interference between them and resulting in low anti-interference performance. Additionally, the lack of filler between the power and signal cores leads to excessive flexibility, easy bending, and low compressive strength, making the internal copper wires prone to breakage. Summary of the Invention

[0004] The purpose of this invention is to provide a rare earth aluminum alloy coaxial cable with a rated voltage of 0.6 / 1KV specifically for equipment, which solves the problems of low anti-interference performance and low pressure resistance of existing equipment-specific coaxial cables.

[0005] The technical solution adopted by this invention to solve its technical problem is: a rare earth aluminum alloy coaxial cable with a rated voltage of 0.6 / 1KV, comprising an inner conductor, an inner insulation layer structure, and an outer sheath, characterized in that: an outer conductor is disposed between the inner insulation layer structure and the outer sheath, and a filling layer structure is disposed between the inner insulation layer structure and the inner conductor, wherein the inner conductor is a rare earth aluminum alloy conductor, and the inner insulation layer structure comprises a first inner insulation layer and a second inner insulation layer disposed outside the inner conductor, wherein the first inner insulation layer and the second inner insulation layer are polyvinyl chloride layers, and a shielding layer is disposed between the first inner insulation layer and the second inner insulation layer.

[0006] The inner conductor is wound with a silicon carbide rare earth aluminum alloy monofilament.

[0007] The shielding layer is an aluminum-coated aramid fiber shielding braided layer.

[0008] The pressure-relief structure includes a pressure-relief ring and a set of bearing blocks disposed in the pressure-relief ring.

[0009] An outer flame-retardant layer is provided between the outer sheath and the outer conductor.

[0010] A waterproof layer is provided between the outer flame-retardant layer and the outer conductor.

[0011] The beneficial effects of this invention are as follows: The cable forms an inner conductor and an outer conductor by winding silicon carbide rare-earth aluminum alloy monofilaments together within the inner conductor. A second independent stranded unit is formed within the outer conductor by winding in the same direction, enabling the outer conductor to possess high tensile strength and adapt to bending requirements. It meets the high-voltage pulse power requirements of equipment, satisfying instantaneous current carrying capacity of hundreds of thousands of amperes. It increases the high-temperature strength and creep resistance of the aluminum alloy, improving the thermal stability, strength, and heat resistance of the aluminum alloy cable.

[0012] The present invention will now be described in more detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention.

[0014] Figure 2 for Figure 1 A schematic diagram of the structure of the middle filling layer.

[0015] Figure 3 for Figure 1 A schematic diagram of the structure of the inner conductor.

[0016] In the figure: 1. Inner conductor, 2. Outer sheath, 3. Outer conductor, 4. First inner insulation layer, 5. Second inner insulation layer, 6. Shielding layer, 7. Pressure ring, 8. Bearing block assembly, 9. Outer flame retardant layer, 10. Waterproof layer, 11. Silicon carbide rare earth aluminum alloy monofilament. Detailed Implementation

[0017] The terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end" used in the application text to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] Example 1, such as Figure 1-3 As shown, a rare-earth aluminum alloy coaxial cable with a rated voltage of 0.6 / 1KV is provided, comprising an inner conductor 1, an inner insulation layer structure, and an outer sheath 2. An outer conductor 3 is disposed between the inner insulation layer structure and the outer sheath. A filling layer structure is disposed between the inner insulation layer structure and the inner conductor. The inner conductor 1 is a rare-earth aluminum alloy conductor. The inner insulation layer structure consists of a first inner insulation layer 4 and a second inner insulation layer 5 disposed outside the inner conductor 1. The first inner insulation layer and the second inner insulation layer are polyvinyl chloride layers. A shielding layer 6 is disposed between the first inner insulation layer and the second inner insulation layer.

[0020] The outer sheath 2 is made of polyvinyl chloride sheath, nitrile polyvinyl chloride composite sheath, or thermoplastic elastomer sheath.

[0021] The inner conductor 1 is wound with a silicon carbide rare earth aluminum alloy monofilament 11.

[0022] The shielding layer 6 is an aluminum-coated aramid fiber shielding braided layer.

[0023] The pressure-relief structure includes a pressure-relief ring 7 and a load-bearing block assembly 8 disposed within the pressure-relief ring.

[0024] An outer flame-retardant layer 9 is provided between the outer sheath and the outer conductor.

[0025] A waterproof layer 10 is provided between the outer flame-retardant layer and the outer conductor.

[0026] The maximum allowable operating temperature of the cable conductor: 51-70°C for nitrile insulated, polyvinyl chloride insulated, or soft polyvinyl chloride and thermoplastic elastomer insulated.

[0027] Minimum ambient temperature for cable operation: not lower than -10°C for PVC insulation, and not lower than -40°C for nitrile PVC composite insulation and thermoplastic elastomer insulation.

[0028] The minimum bending radius of the cable shall not be less than 8 times the outer diameter of the cable.

[0029] This cable consists of an inner conductor and an outer conductor formed by stranding silicon carbide rare-earth aluminum alloy monofilaments within the inner conductor. A second independent stranded unit is formed within the outer conductor by winding in the same direction, giving the outer conductor high tensile strength and adaptability to bending requirements. It meets the high-voltage pulse power requirements of the equipment and can handle instantaneous current carrying capacity of hundreds of thousands of amperes. This design increases the high-temperature strength and creep resistance of the aluminum alloy, improving the thermal stability, strength, and heat resistance of the aluminum alloy cable.

[0030] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

[0031] All parts not covered in this invention are the same as or can be implemented using existing technologies.

Claims

1. A rare-earth aluminum alloy coaxial cable for equipment with a rated voltage of 0.6 / 1KV, comprising an inner conductor, an inner insulation layer structure, and an outer sheath, characterized in that: An outer conductor is disposed between the inner insulation layer structure and the outer sheath, and a filling layer structure is disposed between the inner insulation layer structure and the inner conductor. The inner conductor is a rare earth aluminum alloy conductor. The inner insulation layer structure consists of a first inner insulation layer and a second inner insulation layer outside the inner conductor. The first inner insulation layer and the second inner insulation layer are polyvinyl chloride layers, and a shielding layer is disposed between the first inner insulation layer and the second inner insulation layer.

2. The rare-earth aluminum alloy coaxial cable with a rated voltage of 0.6 / 1KV as described in claim 1, characterized in that: The inner conductor is wound with a silicon carbide rare earth aluminum alloy monofilament.

3. The rare-earth aluminum alloy coaxial cable with a rated voltage of 0.6 / 1KV as described in claim 1, characterized in that: The shielding layer is an aluminum-coated aramid fiber shielding braided layer.

4. The rare-earth aluminum alloy coaxial cable with a rated voltage of 0.6 / 1KV as described in claim 1, characterized in that: The pressure-relief structure includes a pressure-relief ring and a set of bearing blocks disposed in the pressure-relief ring.

5. The rare-earth aluminum alloy coaxial cable with a rated voltage of 0.6 / 1KV as described in claim 1, characterized in that: An outer flame-retardant layer is provided between the outer sheath and the outer conductor.

6. The rare-earth aluminum alloy coaxial cable with a rated voltage of 0.6 / 1KV as described in claim 5, characterized in that: A waterproof layer is provided between the outer flame-retardant layer and the outer conductor.

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