High-strength high-conductivity stranded wire
By adopting a combined structure of core wire, transition layer and aluminum wire layer in the stranded wire and applying anti-corrosion grease on the surface, the problems of low conductivity and easy corrosion of the stranded wire are solved, and higher conductivity, mechanical strength and service life are achieved.
Patent Information
- Application Number
- CN202421708508.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The stranded wire has a low conductivity and is easily corroded under the conditions that meet mechanical strength, and has a short service life.
At least one core wire is twisted to form a core layer, and the core wire can be made of aluminum wire or steel wire; a transition layer is wrapped around the core layer, formed by twisted by a plurality of first aluminum wires and a plurality of first steel wires around the core layer; a second aluminum wire layer is coated outside the transition layer to improve conductivity and mechanical strength, and anti-corrosion grease is applied to the surfaces of the core wire, the first steel wire and the first truncated wire to improve corrosion resistance.
It improves the conductivity and mechanical strength of the stranded wire, extends the service life, and enhances corrosion resistance.
Smart Images
Figure CN222939682U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric wires, and particularly relates to a high-strength and high-conductivity stranded wire. Background Art
[0002] With the rapid development of electric power in various countries around the world, power users have higher and higher requirements for electrical equipment. Especially in the aspect of power transmission, it is required that various electrical equipment make full use of existing transmission lines and corresponding transmission facilities, and improve the transmission efficiency and capacity as much as possible, reduce the loss of transmission lines, and extend the service life of transmission wires. As a key material in transmission lines, the mechanical properties, electrical properties and service life of stranded wires are directly related to the safe operation of transmission lines and power loss. Therefore, it is crucial to improve the comprehensive performance of stranded wire products.
[0003] Due to the long transmission distance, the stranded wire needs to have good mechanical strength to meet the erection requirements. However, at present, the conductivity of the stranded wire is relatively low under the condition of meeting its mechanical strength, resulting in large power loss during transportation. And because the stranded wire is mostly erected in the air and exposed to sunlight and rain for a long time, it is easily eroded by rainwater. The rainwater contains acidic or alkaline substances, which will corrode the stranded wire. At present, the anti-corrosion ability of the stranded wire is poor, it is easily corroded, and its service life is short. Summary of the Utility Model
[0004] The main purpose of the utility model is to propose a high-strength and high-conductivity stranded wire, aiming to solve the technical problems that the conductivity of the stranded wire is relatively low under the condition of meeting its mechanical strength, and it is easily corroded and has a short service life.
[0005] To achieve the above purpose, the high-strength and high-conductivity stranded wire proposed by the utility model includes:
[0006] A core layer, which is formed by stranding at least one core wire; wherein, the core wire is an aluminum wire or a steel wire;
[0007] A transition layer, which is wound around the outside of the core layer. The transition layer is formed by stranding a plurality of first aluminum wires and a plurality of first steel wires around the core layer. At least one first aluminum wire is arranged between any two adjacent first steel wires. The surfaces of the core wire, the first steel wire and the first aluminum wire are all coated with anti-corrosion grease;
[0008] An aluminum wire layer, which is wound around the outside of the transition layer. The aluminum wire layer is formed by stranding a plurality of second aluminum wires around the transition layer.
[0009] In an embodiment, the number of the transition layers is multiple, and the multiple transition layers are stacked in sequence from inside to outside. The aluminum wire layer is wound around the outside of the outermost transition layer.
[0010] In one embodiment, two first aluminum wires are arranged between any two adjacent first steel wires in the same transition layer.
[0011] In one embodiment, the pitch diameter ratio of the first aluminum wires and the first steel wires in each transition layer is less than 12, and the pitch diameter ratio of the first aluminum wires and the pitch diameter ratio of the first steel wires in any one transition layer are not greater than the pitch diameter ratio of the first aluminum wires and the pitch diameter ratio of the first steel wires in the transition layer located inside it;
[0012] and / or,
[0013] The stranding direction of the first aluminum wires and the first steel wires in any one transition layer is opposite to the stranding direction of the first aluminum wires and the first steel wires in another adjacent transition layer.
[0014] In one embodiment, the number of aluminum wire layers is multiple, and the multiple aluminum wire layers are stacked on the outside of the transition layer in sequence from the inner layer to the outer layer.
[0015] In one embodiment, the pitch diameter ratio of the second aluminum wires in each aluminum wire layer is less than 12, and the pitch diameter ratio of the second aluminum wires in any one aluminum wire layer is not greater than the pitch diameter ratio of the second aluminum wires in the aluminum wire layer located inside it;
[0016] and / or,
[0017] The stranding direction of the second aluminum wires in any one aluminum wire layer is opposite to the stranding direction of the second aluminum wires in another adjacent aluminum wire layer.
[0018] In one embodiment, the stranding direction of the first steel wires and the stranding direction of the first aluminum wires in the transition layer located on the innermost side are opposite to the stranding direction of the core wire in the core layer;
[0019] and / or,
[0020] The stranding direction of the first steel wires and the stranding direction of the first aluminum wires in the transition layer located on the outermost side are opposite to the stranding direction of the second aluminum wires in the aluminum wire layer located on the innermost side.
[0021] In one embodiment, the surfaces of the second aluminum wires in at least one aluminum wire layer close to the transition layer are all coated with the anti-corrosion grease.
[0022] In one embodiment, the surfaces of the second aluminum wires in all the aluminum wire layers are all coated with the anti-corrosion grease.
[0023] In one embodiment, the dropping point of the anti-corrosion grease is not less than 180 °C.
[0024] The technical solution of the present utility model forms a core layer by twisting at least one core wire. The core wire can be selected from aluminum wire or steel wire. The core wire can be selected as steel wire. Compared with aluminum wire, steel wire has better mechanical strength but poorer conductivity. The core layer formed by twisting steel wires has better mechanical strength, so that the high-strength and high-conductivity stranded wire of the present utility model has better mechanical strength. The core wire can be selected as aluminum wire. The core layer formed by twisting aluminum wires has higher conductivity, thus improving the conductivity of the high-strength and high-conductivity stranded wire of the present utility model. A transition layer is wound around the core layer. The transition layer is formed by twisting multiple first aluminum wires and multiple first steel wires around the core layer. At least one first aluminum wire is arranged between any two adjacent first steel wires. The first steel wire serves as the skeleton of the transition layer, which can strengthen the structural strength of the transition layer, thereby improving the mechanical strength of the high-strength and high-conductivity stranded wire of the present utility model, making it have good mechanical strength to meet the usage requirements. The first aluminum wires twisted in the transition layer can make the transition layer have good conductivity. By increasing the first aluminum wires between any two adjacent first steel wires, on the basis of the good mechanical strength of the transition layer, the conductivity of the transition layer can be further improved, thereby improving the conductivity of the high-strength and high-conductivity stranded wire of the present utility model. And an aluminum wire layer formed by twisting second aluminum wires is further coated outside the transition layer, which can further improve the conductivity of the high-strength and high-conductivity stranded wire of the present utility model.
[0025] In addition, the surfaces of the core wires in the core layer, the surfaces of the first steel wires and the first aluminum wires in the transition layer are all coated with anti-corrosion grease. The anti-corrosion grease can isolate the core wires, the first steel wires and the first aluminum wires from the outside world, thus preventing the core wires, the first steel wires and the first aluminum wires from being corroded by external corrosive liquids or corrosive gases. The high-strength and high-conductivity stranded wire of the present utility model has good corrosion resistance and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to the structures shown in these drawings.
[0027] Figure 1 It is a schematic structural diagram of an embodiment of the high-strength and high-conductivity stranded wire provided by the present utility model;
[0028] Figure 2 It is a schematic structural diagram of another embodiment of the high-strength and high-conductivity stranded wire provided by the present utility model;
[0029] Figure 3 It is a schematic structural diagram of another embodiment of the high-strength and high-conductivity stranded wire provided by the present utility model;
[0030] Figure 4 Schematic diagram of another embodiment of the high-strength and high-conductivity stranded wire provided by the present utility model;
[0031] Figure 5 Schematic diagram of another embodiment of the high-strength and high-conductivity stranded wire provided by the present utility model;
[0032] Figure 6 Schematic diagram of another embodiment of the high-strength and high-conductivity stranded wire provided by the present utility model.
[0033] Explanation of the reference numerals in the drawings:
[0034] 100, high-strength and high-conductivity stranded wire; 10, core layer; 11, core wire; 20, transition layer; 21, first aluminum wire; 22, first steel wire; 30, aluminum wire layer; 31, second aluminum wire; 40, anti-corrosion grease.
[0035] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments
[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0037] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0038] In addition, if descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or inability to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0039] The present utility model provides a high-strength and high-conductivity stranded wire 100.
[0040] Please refer to Figures 1 to 6 , in an embodiment of the present utility model, the high-strength and high-conductivity stranded wire 100 includes a core layer 10, a transition layer 20, and an aluminum wire layer 30; wherein, the core layer 10 is formed by stranding at least one core wire 11; the core wire 11 is an aluminum wire or a steel wire; the transition layer 20 is wound around the outer side of the core layer 10, and the transition layer 20 is formed by stranding a plurality of first aluminum wires 21 and a plurality of first steel wires 22 around the core layer 10, and at least one first aluminum wire 21 is arranged between any two adjacent first steel wires 22, and an anti-corrosion grease 40 is coated on the surfaces of the core wire 11, the first steel wire 22, and the first aluminum wire 21; the aluminum wire layer 30 is wound around the outer side of the transition layer 20, and the aluminum wire layer 30 is formed by stranding a plurality of second aluminum wires 31 around the transition layer 20.
[0041] The technical solution of the present utility model forms the core layer 10 by stranding at least one core wire 11, and the core wire 11 can be selected as an aluminum wire or a steel wire. As Figures 1 to 5 shown, the core wire 11 can be selected as a steel wire. The steel wire has better mechanical strength compared with the aluminum wire, but its conductivity is poor. The core layer 10 formed by stranding the steel wire has better mechanical strength, so that the high-strength and high-conductivity stranded wire 100 of the present utility model has better mechanical strength; as Figure 6As shown, the core wire 11 can be made of aluminum wire. The core layer 10 formed by stranding aluminum wires has a higher conductivity, thereby improving the conductivity of the high-strength and high-conductivity stranded wire 100 of the present utility model. An intermediate layer 20 is wound around the core layer 10. The intermediate layer 20 is formed by stranding a plurality of first aluminum wires 21 and a plurality of first steel wires 22 around the core layer 10. At least one first aluminum wire 21 is arranged between any two adjacent first steel wires 22. The first steel wires 22 serve as the framework of the intermediate layer 20, which can strengthen the structural strength of the intermediate layer 20, thereby improving the mechanical strength of the high-strength and high-conductivity stranded wire 100 of the present utility model, enabling it to have good mechanical strength to meet the usage requirements. Stranding the first aluminum wires 21 in the intermediate layer 20 can make the intermediate layer 20 have good conductivity. By increasing the first aluminum wires 21 between any two adjacent first steel wires 22, on the basis of the intermediate layer 20 having good mechanical strength, the conductivity of the intermediate layer 20 can be further improved, thereby improving the conductivity of the high-strength and high-conductivity stranded wire 100 of the present utility model. Moreover, an aluminum wire layer 30 formed by stranding second aluminum wires 31 is further coated outside the intermediate layer 20, which can further improve the conductivity of the high-strength and high-conductivity stranded wire 100 of the present utility model.
[0042] Additionally, the surfaces of the core wire 11 in the core layer 10, the surfaces of the first steel wires 22 and the first aluminum wires 21 in the intermediate layer 20 are all coated with anti-corrosion grease 40. The anti-corrosion grease 40 can isolate the core wire 11, the first steel wires 22 and the first aluminum wires 21 from the outside world, thereby preventing the core wire 11, the first steel wires 22 and the first aluminum wires 21 from being corroded by external corrosive liquids or corrosive gases. The high-strength and high-conductivity stranded wire 100 of the present utility model has good corrosion resistance and a long service life.
[0043] In an embodiment of the present utility model, the number of intermediate layers 20 is multiple. The multiple intermediate layers 20 are sequentially stacked from the inside to the outside, and the aluminum wire layer 30 is wound around the outside of the outermost intermediate layer 20.
[0044] Specifically, according to the usage requirements of mechanical strength, the intermediate layer 20 is set to be multiple layers. The multiple intermediate layers 20 can further strengthen the mechanical strength of the high-strength and high-conductivity stranded wire 100 of the present utility model.
[0045] In an embodiment of the present utility model, in the same intermediate layer 20, two first aluminum wires 21 are arranged between any two adjacent first steel wires 22. Specifically, as Figure 5 shown, in the same intermediate layer 20, two first aluminum wires 21 are arranged between any two adjacent first steel wires 22, which can not only provide good mechanical strength for the intermediate layer 20, but also enable the intermediate layer 20 to have high conductivity. The structure is reasonable, and the mechanical strength and conductivity are excellent.
[0046] In an embodiment of the present utility model, the pitch diameter ratio of the first aluminum wire 21 and the first steel wire 22 in each transition layer 20 is less than 12, and the pitch diameter ratio of the first aluminum wire 21 and the pitch diameter ratio of the first steel wire 22 in any transition layer 20 are not greater than the pitch diameter ratio of the first aluminum wire 21 and the pitch diameter ratio of the first steel wire 22 in the transition layer 20 located inside it.
[0047] Specifically, the pitch diameter ratio of the first aluminum wire 21 and the first steel wire 22 being less than 12 can make the formed transition layer 20 more compact, reducing the voids inside the transition layer 20, thereby improving the compactness and stability of the high-strength and high-conductivity stranded wire 100 of the present utility model. Among two adjacent transition layers 20, the pitch diameter ratio of the first aluminum wire 21 in the outer transition layer 20 is greater than the pitch diameter ratio of the first aluminum wire 21 and the pitch diameter ratio of the first steel wire 22 in the inner transition layer 20, and the pitch diameter ratio of the first steel wire 22 in the outer transition layer 20 is greater than the pitch diameter ratio of the first aluminum wire 21 and the pitch diameter ratio of the first steel wire 22 in the inner transition layer 20, ensuring the mechanical strength of the high-strength and high-conductivity stranded wire 100 of the present utility model.
[0048] In an embodiment of the present utility model, the stranding direction of the first aluminum wire 21 and the first steel wire 22 in any transition layer 20 is opposite to the stranding direction of the first aluminum wire 21 and the first steel wire 22 in another adjacent transition layer 20.
[0049] Specifically, when current passes through the first aluminum wire 21 and the first steel wire 22, magnetic lines of force will be generated. If the stranding directions of the first aluminum wire 21 and the first steel wire 22 in two adjacent transition layers 20 are opposite, the directions of the magnetic lines of force they generate will also be opposite, thus canceling each other out, which helps to reduce the AC impedance generated by two adjacent transition layers 20, and thereby can further improve the conductivity of the high-strength and high-conductivity stranded wire 100 of the present utility model.
[0050] In an embodiment of the present utility model, the number of aluminum wire layers 30 is multiple, and the multiple aluminum wire layers 30 are stacked in sequence from the inner layer to the outer layer on the outside of the transition layer 20.
[0051] Specifically, as Figures 1 to 6 shown, there are multiple aluminum wire layers 30 wrapped around the transition layer 20. Setting multiple aluminum wire layers 30 can further improve the conductivity of the high-strength and high-conductivity stranded wire 100 of the present utility model.
[0052] In an embodiment of the present utility model, the pitch diameter ratio of the second aluminum wire 31 in each aluminum wire layer 30 is less than 12, and the pitch diameter ratio of the second aluminum wire 31 in any aluminum wire layer 30 is not greater than the pitch diameter ratio of the second aluminum wire 31 in the aluminum wire layer 30 located inside it;
[0053] Specifically, the pitch diameter ratio of the second aluminum wire 31 is less than 12, which can make the formed aluminum wire layer 30 more compact, reduce the voids in the aluminum wire layer 30, and thus improve the compactness and stability of the high-strength and high-conductivity stranded wire 100 of the present utility model. Among two adjacent aluminum wire layers 30, the pitch diameter ratio of the second aluminum wire 31 in the outer aluminum wire layer 30 is greater than that of the second aluminum wire 31 in the inner aluminum wire layer 30, ensuring the mechanical strength of the high-strength and high-conductivity stranded wire 100 of the present utility model.
[0054] In an embodiment of the present utility model, the stranding direction of the second aluminum wire 31 in any aluminum wire layer 30 is opposite to that of the second aluminum wire 31 in another adjacent aluminum wire layer 30.
[0055] Specifically, when current passes through the second aluminum wire 31, magnetic lines of force will be generated. If the stranding directions of the second aluminum wires 31 in two adjacent aluminum wire layers 30 are opposite, the directions of the magnetic lines of force they generate will also be opposite, thus canceling each other out, which helps to reduce the AC impedance generated by two adjacent aluminum wire layers 30, and thus can further improve the conductivity of the high-strength and high-conductivity stranded wire 100 of the present utility model.
[0056] In an embodiment of the present utility model, the stranding direction of the first steel wire 22 and the stranding direction of the first aluminum wire 21 in the innermost transition layer 20 are opposite to the stranding direction of the core wire 11 in the core layer 10.
[0057] Specifically, the stranding direction of the first steel wire 22 in the innermost transition layer 20 is opposite to the stranding direction of the core wire 11 in the core layer 10, and the stranding direction of the first aluminum wire 21 in the innermost transition layer 20 is opposite to the stranding direction of the core wire 11 in the core layer 10. When current passes through the first aluminum wire 21 and the first steel wire 22 in the innermost transition layer 20, magnetic lines of force will be generated, and when current passes through the core wire 11 in the core layer 10, magnetic lines of force will also be generated. Since the innermost transition layer 20 is arranged close to the core layer 10, if the stranding direction of the first steel wire 22 and the stranding direction of the first aluminum wire 21 in the innermost transition layer 20 are opposite to the stranding direction of the core wire 11 in the core layer 10, the directions of the magnetic lines of force they generate will also be opposite, thus canceling each other out, which helps to reduce the AC impedance generated by the innermost transition layer 20 and the core layer 10, and thus can further improve the conductivity of the high-strength and high-conductivity stranded wire 100 of the present utility model.
[0058] In an embodiment of the present utility model, the stranding direction of the first steel wire 22 and the stranding direction of the first aluminum wire 21 in the outermost transition layer 20 are opposite to the stranding direction of the second aluminum wire 31 in the innermost aluminum wire layer 30.
[0059] Specifically, the stranding direction of the first steel wire 22 of the outermost transition layer 20 is opposite to that of the second aluminum wire 31 of the innermost aluminum wire layer 30, and the stranding direction of the first aluminum wire 21 of the outermost transition layer 20 is opposite to that of the second aluminum wire 31 of the innermost aluminum wire layer 30. When current passes through the first aluminum wire 21 and the first steel wire 22 of the outermost transition layer 20, magnetic lines of force will be generated. When current passes through the second aluminum wire 31 of the innermost aluminum wire layer 30, magnetic lines of force will also be generated. Since the outermost transition layer 20 is close to the innermost aluminum wire layer 30, if the stranding direction of the first steel wire 22 and the first aluminum wire 21 of the outermost transition layer 20 is opposite to that of the second aluminum wire 31 of the innermost aluminum wire layer 30, the directions of the magnetic lines of force they generate will also be opposite, so as to cancel each other out, which helps to generate the AC impedance of the outermost transition layer 20 and the innermost aluminum wire layer 30, and thus can further improve the conductivity of the high-strength and high-conductivity stranded wire 100 of the present utility model.
[0060] In an embodiment of the present utility model, an anti-corrosion grease 40 is coated on the surface of each second aluminum wire 31 in at least one aluminum wire layer 30 disposed close to the transition layer 20.
[0061] Specifically, as Figure 2 , Figure 3 and Figure 6 , the outer surface of the second aluminum wire 31 in the aluminum wire layer 30 with at least one side close to the transition layer 20 is coated with the anti-corrosion grease 40. By coating the anti-corrosion grease 40 on the second aluminum wire 31 of the aluminum wire layer 30 close to the transition layer 20, the transition layer 20 and the core layer 10 can be isolated from the outside world, further avoiding the corrosion of the transition layer 20 and the core layer 10 by external corrosive liquids or corrosive gases, and providing an anti-corrosion effect on the aluminum wire layer 30 coated with the anti-corrosion grease 40, improving the corrosion resistance of the high-strength and high-conductivity stranded wire 100 of the present utility model and having a longer service life.
[0062] In an embodiment of the present utility model, an anti-corrosion grease 40 is coated on the surface of each second aluminum wire 31 in all the aluminum wire layers 30. Specifically, as Figure 4 shown, an anti-corrosion grease 40 is coated on the surface of each second aluminum wire 31 in all the aluminum wire layers 30, which can provide an anti-corrosion effect for all the aluminum wire layers 30, avoid the corrosion of all the aluminum wire layers 30 by external corrosive liquids or corrosive gases, and further improve the corrosion resistance of the high-strength and high-conductivity stranded wire 100 of the present utility model and have a longer service life.
[0063] In an embodiment of the present utility model, the dropping point of the anti-corrosion grease is not less than 180 °C. Specifically, the anti-corrosion grease with a dropping point not lower than 180 °C has good high-temperature stability. Under high-temperature conditions, the anti-corrosion grease is not easily softened, flowed or dripped, so as to maintain its adhesion and lubricity on the metal surface and ensure that the anti-corrosion effect is not affected.
[0064] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.
Claims
1. A high-strength and high-conductivity stranded wire, characterized in that: The high-strength and high-conductivity stranded wire comprises: A core layer, wherein the core layer is formed by twisting at least one core wire; wherein the core wire is an aluminum wire or a steel wire; a transition layer, the transition layer being wrapped around the outer side of the core layer, the transition layer being formed by twisting a plurality of first aluminum wires and a plurality of first steel wires around the core layer, at least one first aluminum wire being arranged between any two adjacent first steel wires, and surfaces of the core wire, the first steel wire and the first aluminum wire being coated with anti-corrosion grease; An aluminum wire layer is wrapped around the outer side of the transition layer, and the aluminum wire layer is formed by twisting a plurality of second aluminum wires around the transition layer.
2. The high-strength and high-conductivity stranded wire according to claim 1, characterized in that: The number of the transition layers is multiple, and the multiple transition layers are stacked in sequence from the inside to the outside, and the aluminum wire layer is wrapped around the outside of the outermost transition layer.
3. The high-strength and high-conductivity stranded wire according to claim 2, characterized in that: In the same transition layer, two first aluminum wires are arranged between any two adjacent first steel wires.
4. The high-strength and high-conductivity stranded wire according to claim 2, characterized in that: The pitch diameter ratio of the first aluminum wire and the first steel wire in each of the transition layers is less than 12, and the pitch diameter ratio of the first aluminum wire and the pitch diameter ratio of the first steel wire in any transition layer are not greater than the pitch diameter ratio of the first aluminum wire and the pitch diameter ratio of the first steel wire in the transition layer located inside the transition layer; and / or, The twisting direction of the first aluminum wire and the first steel wire in any transition layer is opposite to the twisting direction of the first aluminum wire and the first steel wire in another adjacent transition layer.
5. The high-strength and high-conductivity stranded wire according to claim 2, characterized in that: The number of the aluminum wire layers is multiple layers, and the multiple aluminum wire layers are sequentially stacked on the outer side of the transition layer from the inner layer to the outer layer.
6. The high-strength and high-conductivity stranded wire according to claim 5, characterized in that: The pitch diameter ratio of the second aluminum wire in each of the aluminum wire layers is less than 12, and the pitch diameter ratio of the second aluminum wire in any of the aluminum wire layers is not greater than the pitch diameter ratio of the second aluminum wire in the aluminum wire layer located inside the aluminum wire layer; and / or, The twisting direction of the second aluminum wires in any aluminum wire layer is opposite to the twisting direction of the second aluminum wires in another adjacent aluminum wire layer.
7. The high-strength and high-conductivity stranded wire according to claim 5, characterized in that: The twisting direction of the first steel wires and the first aluminum wires of the innermost transition layer are opposite to the twisting direction of the core wires of the core layer; and / or, The twisting direction of the first steel wires and the twisting direction of the first aluminum wires in the outermost transition layer are opposite to the twisting direction of the second aluminum wires in the innermost aluminum wire layer.
8. The high-strength and high-conductivity stranded wire according to any one of claims 1 to 7, characterized in that: The surface of each of the second aluminum wires in at least one aluminum wire layer disposed close to the transition layer is coated with the anti-corrosion grease.
9. The high-strength and high-conductivity stranded wire according to claim 8, characterized in that: The surface of each of the second aluminum wires in all the aluminum wire layers is coated with the anti-corrosion grease.
10. The high-strength and high-conductivity stranded wire according to any one of claims 1 to 7, characterized in that: The dropping point of the anti-corrosion grease is not less than 180°C.