A kind of aging-resistant aluminum stranded wire and preparation method thereof

Abstract

The present invention relates to the technical field of aluminum stranded wire preparation, and specifically discloses an aging-resistant aluminum stranded wire and a preparation method thereof, comprising a fixed tube, the outer surface of the fixed tube is provided with a fitting groove, the fitting groove is extended in a spiral shape, and a plurality of the fitting grooves are arranged at fixed intervals around the central axis of the fixed tube, and also comprises: an aluminum wire, the inner surface of the aluminum wire is tightly fitted in the fitting groove, and the aluminum wire is combined into a tubular aluminum stranded wire. By providing a groove on the second steel core and arranging the groove and the contact hole relative to each other, after the aluminum wire is twisted on the fixed tube, the aluminum wire will also achieve point contact and mutual engagement through the groove and the second steel core. Through this engagement method, the second steel core can be limited during use to avoid the second steel core being linearly distributed in the fixed tube and shifting to reduce the structural strength of the aluminum stranded wire. By distributing the second steel core linearly, the production time can be greatly reduced, and the production efficiency can be greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum stranded wire preparation, in particular to an aging-resistant aluminum stranded wire and a preparation method thereof. Background Art

[0002] Aluminum stranded wire is a power transmission material widely used in power lines, especially overhead transmission lines. It is made of multiple aluminum wires twisted together, sometimes combined with a steel core for strength. The selection of aluminum stranded wire is critical to the performance, efficiency and reliability of power transmission lines.

[0003] In the existing field of aluminum stranded wire preparation technology, traditional aluminum stranded wires usually use steel core as a reinforcing material to improve the overall mechanical strength and electrical conductivity. However, these traditional aluminum stranded wires may encounter some problems during long-term use, especially under harsh environmental conditions, such as aging, corrosion, wear, etc. These problems will affect the performance and service life of the aluminum stranded wire. First, the contact area between the steel core and the aluminum wire of the traditional aluminum stranded wire is large, which may lead to electrochemical corrosion in a humid environment, especially in coastal areas or areas with severe industrial pollution. This corrosion will not only reduce the mechanical strength of the aluminum stranded wire, but also may affect its electrical conductivity. Secondly, during the production process of traditional aluminum stranded wire, the twisting method of the steel core and the aluminum wire may lead to uneven structural strength, which may cause internal damage when the aluminum stranded wire is subjected to external force, thereby affecting its stability and reliability. In addition, when working in a high temperature environment, the traditional aluminum stranded wire may overheat due to poor heat dissipation, which will accelerate the aging process of the material and shorten the service life of the aluminum stranded wire. Summary of the invention

[0004] The present invention provides an aging-resistant aluminum stranded wire and a preparation method thereof, which solve the problems mentioned in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an aging-resistant aluminum stranded wire, comprising a fixed tube, the outer surface of the fixed tube is provided with a bonding groove, the bonding groove is extended in a spiral shape, and a plurality of bonding grooves are arranged at fixed intervals around the central axis of the fixed tube, and further comprising:

[0006] Aluminum wires, the inner surfaces of the aluminum wires are tightly fitted in the fitting grooves, the number of the aluminum wires is equal to the number of the fitting grooves, and the aluminum wires are combined into a tubular aluminum stranded wire;

[0007] A fixing belt, the ends of which are fixedly connected to a connecting seat, the fixing belt is respectively wound around the outer surfaces of both ends of the aluminum stranded wire and fixed to the connecting seat by bolts;

[0008] A first steel core, the first steel core is fixedly embedded in the inner surface of the fixed tube, and six first steel cores are arranged at fixed intervals around the central axis of the fixed tube;

[0009] A second steel core, the second steel core is fixedly embedded in the inner surface of the fixed tube, and six second steel cores are arranged at fixed intervals around the central axis of the fixed tube;

[0010] A heat dissipation pipe, wherein the heat dissipation pipe is sleeved inside the fixed pipe, the heat dissipation pipe and the fixed pipe are arranged on the same central axis, and the outer surface of the heat dissipation pipe is fixedly embedded inside the first steel core;

[0011] The support frame is fixedly connected to the outer surface of the heat dissipation pipe, and six support frames are arranged at fixed intervals around the central axis of the heat dissipation pipe.

[0012] Preferably, the inner surface of the fixing tube is penetrated with a contact hole, the contact hole is opened in the fitting groove, and the contact holes are linearly distributed in the fitting groove.

[0013] Preferably, the contact hole is arranged on the outside of the second steel core, and a groove is provided on the outer surface of the second steel core, the groove is completely aligned with the contact hole, and the surface of the groove forms a complete spiral surface with the fitting groove. By twisting the aluminum wire in the fitting groove on the outer surface of the fixed tube, the overall structural strength of the aluminum wire after twisting is greatly improved, and the possibility of displacement and friction of the aluminum wire during use is also greatly reduced, thereby ensuring the working stability and conductivity of the aluminum wire.

[0014] Preferably, the first steel core and the second steel core are arranged in an interlaced and staggered manner.

[0015] Preferably, a connecting strip is fixedly connected to the inner surface of the fixed tube, and the adjacent first steel cores and second steel cores are connected via the connecting strip, and the first steel cores and the second steel cores are combined into a hexagonal shape via the connecting strip.

[0016] Preferably, a cavity is reserved between the fixing tube and the heat dissipation tube.

[0017] Preferably, the inner side of the second steel core is arranged in the cavity between the fixed tube and the heat dissipation tube, and the inner side of the second steel core does not contact the heat dissipation tube. At the same time, the diameter of the second steel core is smaller than that of the first steel core. Since the first steel core and the second steel core are staggered and connected by a connecting strip, the first steel core and the second steel core are a whole during normal operation, which greatly improves the supporting strength of the first steel core and the second steel core, and ensures the overall structural strength of the aluminum stranded wire during operation.

[0018] Preferably, the support frame is arranged in a cavity between the fixed tube and the heat dissipation tube, the inner side of the support frame is arranged in an arc shape, the outer side of the support frame is arranged in a V shape, the two ends of the outer side of the support frame are respectively fixedly connected to the inner surfaces of two adjacent connecting strips, and the support frame is arranged on the inner side opposite to the second steel core. Since the first steel core and the second steel core are mutually embedded with the fixed tube and the heat dissipation tube, and the first steel core and the second steel core are mutually connected through the connecting strip, the first steel core and the second steel core are both limited by the cooperation of the groove and the aluminum wire during operation, so that the first steel core and the second steel core cannot be displaced.

[0019] A method for preparing an aging-resistant aluminum stranded wire comprises the following steps:

[0020] S1. Prepare the low carbon steel and ceramic powder required for production and processing;

[0021] S2, heating and softening the low carbon steel in S1, and placing the heated and softened low carbon steel into a wire drawing machine for wire drawing to form linear low carbon steel, and during the wire drawing process, spraying ceramic powder uniformly on the outer surface of the linear low carbon steel by high temperature spraying around the surface of the high temperature linear low carbon steel just drawn;

[0022] S3, performing secondary surface treatment on the surface of the linear low-carbon steel prepared in S2 by laser remelting technology;

[0023] S4, placing the linear low-carbon steel processed by laser remelting in S3 on a vibrating machine, and placing the vibrating machine and the linear low-carbon steel in an insulation box for 15 minutes for slow cooling, and starting the vibrating machine during the cooling process, and then forming the first steel core and the second steel core of the required size through a reducing machine and a cutting machine after the cooling is completed;

[0024] S5, passivating, cleaning and roasting the first steel core and the second steel core in S4, respectively, and polishing the outer surfaces of the first steel core and the second steel core after the roasting, and cleaning and drying again after the polishing to obtain the desired first steel core and the second steel core;

[0025] S6. Combining the first steel core and the second steel core obtained in S5 with a fixing tube, an aluminum wire, a heat dissipation tube, a support frame and a connecting strip to form the above-mentioned aging-resistant aluminum stranded wire.

[0026] The present invention provides an aging-resistant aluminum stranded wire and a preparation method thereof. It has the following beneficial effects:

[0027] 1. The aging-resistant aluminum stranded wire and its preparation method, by opening a groove on the second steel core, and setting the groove and the contact hole relative to each other, after the aluminum wire is twisted on the fixed tube, the aluminum wire will also achieve point contact and mutual engagement with the second steel core through the groove. Through this engagement method, the second steel core can be limited during use to avoid the second steel core being linearly distributed in the fixed tube and shifting to reduce the structural strength of the aluminum stranded wire. By distributing the second steel core linearly, the production time can be greatly reduced, and the production efficiency is greatly improved. The aluminum wire can also achieve point contact with the second steel core through the groove and the contact hole, which is different from the existing installation method of twisting the steel core and the aluminum wire, and greatly reduces the steel core. The contact area between the second steel core and the aluminum wire can greatly reduce the possibility of bimetallic corrosion, thereby greatly improving the service life of the aluminum stranded wire. By making point contact between the second steel core and the aluminum wire, the contact resistance between them can be greatly reduced, thereby improving the conductive efficiency of the aluminum stranded wire. At the same time, it can also reduce fatigue damage caused by vibration caused by wind during normal operation, thereby improving the vibration resistance of the aluminum stranded wire, thereby greatly reducing the aging speed of the aluminum stranded wire. By installing a heat dissipation pipe, the interior of the aluminum stranded wire can be made hollow, increasing the internal air circulation effect of the aluminum stranded wire, thereby providing a good heat dissipation effect for the aluminum stranded wire when the aluminum stranded wire is working, greatly reducing the aging speed of the aluminum stranded wire caused by heat.

[0028] 2. The aging-resistant aluminum stranded wire and its preparation method, since the first steel core and the second steel core are connected into a hexagonal shape by a connecting strip, the external supporting force of each second steel core is greatly improved, thereby providing better structural stability, making the aluminum stranded wire more stable when affected by external wind force, reducing the generation of vibration, thereby further improving the service life of the aluminum stranded wire, and at the same time, the hexagonal layout can also distribute the tension more evenly, thereby improving the overall tensile strength of the aluminum stranded wire.

[0029] 3. The aging-resistant aluminum stranded wire and its preparation method, by installing a support frame on the outer surface of the heat dissipation pipe, can provide a supporting force between the first steel core and the second steel core through the support frame during operation, which can not only prevent the heat dissipation pipe from undergoing large torsional deformation, but also enhance the working stability of the first steel core and the second steel core, and can also avoid excessive bending of the first steel core and the second steel core, thereby greatly improving the wind resistance of the aluminum stranded wire, avoiding violent shaking of the aluminum stranded wire in windy weather that causes strong friction between the aluminum wires, thereby greatly improving the service life of the aluminum stranded wire, and improving the aging resistance. Moreover, through the structural design of the support frame, a certain cavity can be created between the fixed tube and the heat dissipation tube, thereby further improving the heat dissipation efficiency of the aluminum stranded wire during operation.

[0030] 4. The aging-resistant aluminum stranded wire and its preparation method can significantly improve the wear resistance of the surface of the first steel core and the second steel core by thermally spraying ceramic powder on the surface of the first steel core and the second steel core, and extend the service life of the first steel core and the second steel core. At the same time, the ceramic coating can provide a protective barrier for the steel core to prevent the corrosive medium from directly contacting the steel core, thereby improving the corrosion resistance of the steel core. The ceramic coating can reduce the friction coefficient between the steel core and the aluminum wire, further reducing wear and energy loss. The density of the ceramic powder coating can be greatly improved by laser remelting technology, while reducing internal stress and greatly reducing the possibility of cracks in the ceramic powder coating, thereby greatly improving the working stability of the first steel core and the second steel core. By keeping the first steel core and the second steel core after thermal spraying the ceramic powder for 15 minutes to slowly cool them down, it can also avoid the ceramic powder coating from causing cracks on the coating surface due to too fast a cooling rate, affecting the working effect. At the same time, the auxiliary vibration machine vibrates the first steel core and the second steel core during the slow cooling process, further reducing the internal stress of the ceramic powder coating, and greatly improving the stability of the ceramic powder coating at work. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a front view of the present invention;

[0032] Figure 2 is a side view of the present invention;

[0033] Figure 3 This is a schematic diagram of the installation structure of the fixed tube and the aluminum wire of the present invention;

[0034] Figure 4 It is a structural schematic diagram of the fixed pipe of the present invention;

[0035] Figure 5 It is a schematic diagram of the split structure of the first steel core, the second steel core and the fixed tube of the present invention;

[0036] Figure 6 It is a structural schematic diagram of the connecting strip of the present invention;

[0037] Figure 7 It is a structural schematic diagram of the support frame of the present invention;

[0038] Figure 8 The present invention Figure 7 A partial enlarged view of middle A.

[0039] In the figure: 1. fixing tube; 2. fitting groove; 3. aluminum wire; 4. fixing belt; 5. first steel core; 6. second steel core; 7. heat dissipation tube; 8. support frame; 9. contact hole; 10. groove; 11. connecting strip. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] First embodiment: Figures 1 to 8 As shown, the present invention provides a technical solution: an aging-resistant aluminum stranded wire, comprising a fixed tube 1, a bonding groove 2 is provided on the outer surface of the fixed tube 1, the bonding groove 2 is extended in a spiral shape, and a plurality of bonding grooves 2 are arranged at fixed intervals around the central axis of the fixed tube 1, and further comprising:

[0042] Aluminum wires 3, the inner surfaces of the aluminum wires 3 are tightly fitted in the fitting grooves 2, the number of the aluminum wires 3 is equal to the number of the fitting grooves 2, and the aluminum wires 3 are combined into a tubular aluminum stranded wire;

[0043] A fixing belt 4, the ends of which are fixedly connected to a connecting seat, the fixing belt 4 is respectively wound around the outer surfaces of both ends of the aluminum stranded wire and fixed to the connecting seat by bolts;

[0044] A first steel core 5, the first steel core 5 is fixedly embedded in the inner surface of the fixed tube 1, and six first steel cores 5 are arranged at fixed intervals around the central axis of the fixed tube 1;

[0045] The second steel core 6 is fixedly embedded in the inner surface of the fixed tube 1, and six second steel cores 6 are arranged at fixed intervals around the central axis of the fixed tube 1;

[0046] The heat dissipation pipe 7 is sleeved inside the fixed pipe 1. The heat dissipation pipe 7 and the fixed pipe 1 are arranged on the same central axis. The outer surface of the heat dissipation pipe 7 is fixedly embedded inside the first steel core 5.

[0047] The support frame 8 is fixedly connected to the outer surface of the heat dissipation tube 7 , and six support frames 8 are arranged at fixed intervals around the central axis of the heat dissipation tube 7 .

[0048] The inner surface of the fixing tube 1 is penetrated with a contact hole 9 , which is arranged in the fitting groove 2 , and the contact holes 9 are linearly distributed in the fitting groove 2 .

[0049] The contact hole 9 is arranged outside the second steel core 6 , and a groove 10 is opened on the outer surface of the second steel core 6 . The groove 10 is completely aligned with the contact hole 9 , and the surface of the groove 10 forms a complete spiral surface with the fitting groove 2 .

[0050] During operation, by twisting the aluminum wire 3 in the fitting groove 2 on the outer surface of the fixed tube 1, the overall structural strength of the aluminum wire 3 after the twisting is completed can be greatly improved, and the possibility of displacement and friction of the aluminum wire 3 during use is also greatly reduced, thereby ensuring the working stability and conductivity of the aluminum wire 3. By opening a groove 10 on the second steel core 6 and setting the groove 10 relative to the contact hole 9, when the aluminum wire 3 is twisted on the fixed tube 1, the aluminum wire 3 can also achieve point contact and mutual engagement with the second steel core 6 through the groove 10. This engagement method can limit the second steel core 6 during use to avoid displacement of the second steel core 6 in a linear distribution in the fixed tube 1, thereby reducing the structural strength of the aluminum stranded wire. By distributing the second steel core 6 in a linear shape, the production time can be greatly reduced, thereby greatly improving the production efficiency. The aluminum wire 3 can also pass through the groove 1 0 and the contact hole 9 realize point contact with the second steel core 6, which is different from the existing installation method in which the steel core and the aluminum wire 3 are twisted with each other. The contact area between the steel core and the aluminum wire 3 is greatly reduced, thereby greatly reducing the possibility of bimetallic corrosion, and thus greatly improving the service life of the aluminum stranded wire. By making point contact between the second steel core 6 and the aluminum wire 3, the contact resistance between them can be greatly reduced, and the conductive efficiency of the aluminum stranded wire can be improved. At the same time, fatigue damage caused by vibration caused by wind during normal operation can be reduced, thereby improving the vibration resistance of the aluminum stranded wire, thereby greatly reducing the aging speed of the aluminum stranded wire. By installing the heat dissipation pipe 7, the interior of the aluminum stranded wire can be made hollow, and the internal air circulation effect of the aluminum stranded wire can be increased, thereby providing a good heat dissipation effect for the aluminum stranded wire when the aluminum stranded wire is working, and greatly reducing the aging speed of the aluminum stranded wire caused by heat.

[0051] Second embodiment: Figures 1 to 8 As shown, the first steel core 5 and the second steel core 6 are arranged in an interlaced and staggered manner.

[0052] A connecting strip 11 is fixedly connected to the inner surface of the fixed tube 1 , and the adjacent first steel cores 5 and second steel cores 6 are connected via the connecting strip 11 . The first steel core 5 and the second steel core 6 are combined into a hexagonal shape via the connecting strip 11 .

[0053] A cavity is reserved between the fixed tube 1 and the heat dissipation tube 7 .

[0054] The inner side of the second steel core 6 is arranged in the cavity between the fixed tube 1 and the heat dissipation tube 7 , and the inner side of the second steel core 6 does not contact the heat dissipation tube 7 . Meanwhile, the diameter of the second steel core 6 is smaller than that of the first steel core 5 .

[0055] During operation, since the first steel core 5 and the second steel core 6 are staggered and connected by the connecting strip 11, the first steel core 5 and the second steel core 6 are a whole during normal operation, which greatly improves the supporting strength of the first steel core 5 and the second steel core 6, and ensures the overall structural strength of the aluminum stranded wire during operation. At the same time, since the first steel core 5 and the second steel core 6 are connected into a hexagonal shape by the connecting strip 11, the external supporting force of each second steel core 6 is greatly improved, thereby providing better structural stability, making the aluminum stranded wire more stable when affected by external wind force, reducing the generation of vibration, thereby further improving the service life of the aluminum stranded wire. At the same time, the hexagonal layout can also distribute the tension more evenly, thereby improving the overall tensile strength of the aluminum stranded wire.

[0056] The support frame 8 is arranged in the cavity between the fixed tube 1 and the heat dissipation tube 7, the inner side of the support frame 8 is arranged to be arc-shaped, the outer side of the support frame 8 is arranged to be V-shaped, the two ends of the outer side of the support frame 8 are respectively fixedly connected to the inner surfaces of two adjacent connecting strips 11, and the support frame 8 is arranged on the inner side opposite to the second steel core 6.

[0057] The third embodiment: Figures 1 to 8 As shown, during operation, since the first steel core 5 and the second steel core 6 are mutually embedded with the fixing tube 1 and the heat dissipation tube 7, and the first steel core 5 and the second steel core 6 are mutually connected through the connecting strip 11, the first steel core 5 and the second steel core 6 are simultaneously limited by the cooperation of the groove 10 and the aluminum wire 3 during operation, so that the first steel core 5 and the second steel core 6 cannot be displaced. By installing the support frame 8 on the outer surface of the heat dissipation tube 7, a supporting force can be provided between the first steel core 5 and the second steel core 6 through the support frame 8 during operation, which can not only prevent the heat dissipation tube 7 from The first steel core 5 and the second steel core 6 can generate a larger torsional deformation, and at the same time, the working stability of the first steel core 5 and the second steel core 6 can be enhanced, and excessive bending of the first steel core 5 and the second steel core 6 can be avoided, thereby greatly improving the wind resistance of the aluminum stranded wire, avoiding the aluminum stranded wire from shaking violently in windy weather, causing strong friction between the aluminum wires 3, and thus greatly improving the service life of the aluminum stranded wire, and improving the aging resistance strength. Through the structural design of the support frame 8, a certain cavity can be made between the fixed tube 1 and the heat dissipation tube 7, thereby further improving the heat dissipation efficiency of the aluminum stranded wire during operation.

[0058] A method for preparing an aging-resistant aluminum stranded wire comprises the following steps:

[0059] S1. Prepare the low carbon steel and ceramic powder required for production and processing;

[0060] S2, heating and softening the low carbon steel in S1, and placing the heated and softened low carbon steel into a wire drawing machine for wire drawing to form linear low carbon steel, and during the wire drawing process, spraying ceramic powder uniformly on the outer surface of the linear low carbon steel by high temperature spraying around the surface of the high temperature linear low carbon steel just drawn;

[0061] S3, performing secondary surface treatment on the surface of the linear low-carbon steel prepared in S2 by laser remelting technology;

[0062] S4, placing the linear low-carbon steel processed by laser remelting in S3 on a vibrating machine, and placing the vibrating machine and the linear low-carbon steel in an insulation box for 15 minutes for slow cooling, and starting the vibrating machine during the cooling process, and then forming the first steel core 5 and the second steel core 6 of the required size through a reducing machine and a cutting machine after the cooling is completed;

[0063] S5, passivating, cleaning and roasting the first steel core 5 and the second steel core 6 in S4, respectively, and polishing the outer surfaces of the first steel core 5 and the second steel core 6 after the roasting, and cleaning and drying again after the polishing to obtain the final first steel core 5 and the second steel core 6;

[0064] S6. The first steel core 5 and the second steel core 6 obtained in S5 are combined with the fixing tube 1, the aluminum wire 3, the heat dissipation tube 7, the support frame 8 and the connecting strip 11 to form the above-mentioned aging-resistant aluminum stranded wire.

[0065] By thermally spraying ceramic powder on the surface of the first steel core 5 and the second steel core 6, the wear resistance of the surface of the first steel core 5 and the second steel core 6 can be significantly improved, and the service life of the first steel core 5 and the second steel core 6 can be extended. At the same time, the ceramic coating can provide a protective barrier for the steel core to prevent the corrosive medium from directly contacting the steel core, thereby improving the corrosion resistance of the steel core. The ceramic coating can reduce the friction coefficient between the steel core and the aluminum wire 3, further reducing wear and energy loss. The laser remelting technology can greatly improve the density of the ceramic powder coating, while reducing the internal stress and greatly reducing the possibility of cracks in the ceramic powder coating, thereby greatly improving the working stability of the first steel core 5 and the second steel core 6. By keeping the first steel core 5 and the second steel core 6 after thermal spraying the ceramic powder for 15 minutes to slowly cool down, it can also prevent the ceramic powder coating from causing cracks on the coating surface due to too fast a cooling speed, affecting the working effect. At the same time, the auxiliary vibration machine vibrates the first steel core 5 and the second steel core 6 during the slow cooling process, further reducing the internal stress of the ceramic powder coating, and greatly improving the stability of the ceramic powder coating at work.

[0066] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by... does not exclude the existence of other identical elements in the process, method, article or device including the element".

Claims

1. An aging-resistant aluminum stranded wire, comprising a fixing tube (1), characterized in that: The outer surface of the fixed tube (1) is provided with a fitting groove (2), the fitting groove (2) is arranged to extend in a spiral shape, and a plurality of fitting grooves (2) are arranged at fixed intervals around the central axis of the fixed tube (1), and further comprising: Aluminum wires (3), the inner surface of the aluminum wires (3) being tightly fitted in the fitting grooves (2), the number of the aluminum wires (3) being equal to the number of the fitting grooves (2), and the aluminum wires (3) being combined into a tubular aluminum stranded wire; A fixing belt (4), the ends of which are fixedly connected to a connecting seat, the fixing belt (4) being respectively wound around the outer surfaces of both ends of the aluminum stranded wire and fixed to the connecting seat by bolts; A first steel core (5), the first steel core (5) being fixedly embedded in the inner surface of the fixed tube (1), and six first steel cores (5) being arranged at fixed intervals around the central axis of the fixed tube (1); A second steel core (6), the second steel core (6) being fixedly embedded in the inner surface of the fixed tube (1), and six second steel cores (6) are arranged at fixed intervals around the central axis of the fixed tube (1); A heat dissipation pipe (7), the heat dissipation pipe (7) being sleeved inside the fixed pipe (1), the heat dissipation pipe (7) and the fixed pipe (1) being arranged on the same central axis, and the outer surface of the heat dissipation pipe (7) being fixedly embedded inside the first steel core (5); A support frame (8), the support frame (8) being fixedly connected to the outer surface of the heat dissipation pipe (7), and six of the support frames (8) are arranged at fixed intervals around the central axis of the heat dissipation pipe (7); The inner surface of the fixing tube (1) is penetrated by a contact hole (9), the contact hole (9) is arranged in the fitting groove (2), and the contact holes (9) are linearly distributed in the fitting groove (2); The contact hole (9) is arranged on the outside of the second steel core (6), and a groove (10) is provided on the outer surface of the second steel core (6), the groove (10) and the contact hole (9) are completely aligned, and the surface of the groove (10) and the fitting groove (2) form a complete spiral surface; The first steel core (5) and the second steel core (6) are arranged in an interlaced and staggered manner; A connecting strip (11) is fixedly connected to the inner surface of the fixed tube (1), and the adjacent first steel cores (5) and second steel cores (6) are connected via the connecting strip (11), and the first steel cores (5) and the second steel cores (6) are combined into a hexagonal shape via the connecting strip (11); A cavity is reserved between the fixed tube (1) and the heat dissipation tube (7); The inner side of the second steel core (6) is arranged in the cavity between the fixed tube (1) and the heat dissipation tube (7), and the inner side of the second steel core (6) does not contact the heat dissipation tube (7), and the diameter of the second steel core (6) is smaller than that of the first steel core (5); The support frame (8) is arranged in a cavity between the fixed tube (1) and the heat dissipation tube (7); the inner side of the support frame (8) is arranged in an arc shape; the outer side of the support frame (8) is arranged in a V shape; the two ends of the outer side of the support frame (8) are respectively fixedly connected to the inner surfaces of two adjacent connecting strips (11); and the support frame (8) is arranged on the inner side directly opposite to the second steel core (6).

2. A method for preparing an aging-resistant aluminum stranded wire, characterized in that: The following steps are involved: S1. Prepare the low carbon steel and ceramic powder required for production and processing; S2, heating and softening the low carbon steel in S1, and placing the heated and softened low carbon steel into a wire drawing machine for wire drawing to form linear low carbon steel, and during the wire drawing process, spraying ceramic powder uniformly on the outer surface of the linear low carbon steel by high temperature spraying around the surface of the high temperature linear low carbon steel just drawn; S3, performing secondary surface treatment on the surface of the linear low-carbon steel prepared in S2 by laser remelting technology; S4, placing the linear low-carbon steel processed by laser remelting in S3 on a vibrating machine, and placing the vibrating machine and the linear low-carbon steel in an insulation box for 15 minutes for slow cooling, and starting the vibrating machine during the cooling process, and then, after the cooling is completed, using a reducing machine and a cutting machine to form a first steel core (5) and a second steel core (6) of a desired size; S5, passivating, cleaning and roasting the first steel core (5) and the second steel core (6) in S4, respectively, and polishing the outer surfaces of the first steel core (5) and the second steel core (6) after the roasting, and cleaning and drying again after the polishing to obtain the desired first steel core (5) and the second steel core (6); S6. The first steel core (5) and the second steel core (6) obtained in S5 are combined with a fixing tube (1), an aluminum wire (3), a heat dissipation tube (7), a support frame (8) and a connecting strip (11) to form the aging-resistant aluminum stranded wire described in claim 1.

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