Aluminum-clad invar steel core alloy stranded wire and production process thereof
By placing an alloy sheath on the outside of the steel core conductor of the aluminum-clad invar core alloy stranded wire, and adopting a locking clamp design with a T-shaped clamping plate and slot structure, the existing locking clamp is difficult to disassemble and loosen and fall off. problem, achieving higher connection tightness and service life.
Patent Information
- Application Number
- CN202310894497.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-20
- Publication Date
- 2025-01-21
AI Technical Summary
The existing aluminum-clad steel core alloy stranded clamps are difficult to disassemble, assemble and repair during use, and they cannot limit and clamp the outer sides of the stranded wire, and are prone to loosening and falling off problems.
An aluminum-clad invar core alloy stranded wire is designed. By setting a first alloy sheath outside the steel core conductor, and setting a second alloy sheath between the first protective sheath and the second protective sheath, the adhesion of the conductor is improved. Adhesion and conductivity. At the same time, the T-shaped clamp plate and T-shaped slot structure are used to enable the locking clamp to be clamped on the outside of the stranded wire, and the anti-slip clamping piece, blocking rod, blocking groove and compression spring are installed on the inside to realize the limit clamp. hold.
It effectively improves the tightness of the connection between the locking clamp and the alloy stranded wire, solves the problems of loosening and falling off, and extends the service life of the stranded wire.
Smart Images
Figure CN119339994A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of conductor structures, in particular to an aluminum-clad Invar core alloy stranded wire and a production process thereof. Background Art
[0002] Aluminum clad Invar core alloy stranded wire is a power cable product. It is formed by aluminum cladding on an Invar core, and there is an alloy layer between the aluminum layer and the steel core. This alloy stranded wire is usually used in power transmission and distribution systems and has high conductivity and strength. This aluminum clad Invar core alloy stranded wire has good conductivity, corrosion resistance and mechanical strength, and is suitable for long-distance transmission lines and high-load power transmission. It is widely used in the power industry and can effectively transmit and distribute electrical energy, improving the efficiency and reliability of the power system.
[0003] At present, the locking clamps used for aluminum-clad Invar steel core alloy stranded wire mostly adopt an integrated structural design. The locking clamps adopting this integrated design have good integrity and high stability. However, during use, the existing locking clamps cannot be disassembled, connected, repaired or replaced according to the use of the aluminum-clad Invar steel core alloy stranded wire, nor can they limit and clamp the outer sides of the sleeved aluminum-clad Invar steel core alloy stranded wire. In addition, the existing locking clamps are prone to loosening and falling off during use, which has a certain impact on the service life of the aluminum-clad Invar steel core alloy stranded wire.
[0004] Based on this, the present invention designs an aluminum-clad Invar core alloy stranded wire and a production process thereof to solve the above-mentioned problems. Summary of the invention
[0005] The object of the present invention is to provide an aluminum-clad Invar core alloy stranded wire and a production process thereof to solve the above-mentioned problems.
[0006] To achieve the above object, the present invention provides the following technical solution: an aluminum-clad invar core alloy stranded wire, comprising an alloy stranded wire and a locking clamp, the outer sleeve of the alloy stranded wire is provided with a locking clamp, the alloy stranded wire comprises an alloy inner core, the outer periphery of the alloy inner core is provided with a first protective sleeve, and the outer periphery of the first protective sleeve is also provided with a second protective sleeve;
[0007] The locking clamp comprises a first clamp component, and a second clamp component is arranged on one side of the first clamp component.
[0008] Based on the above technical features, the present invention can support and protect the outside of the steel core conductor by means of the first alloy sheath sleeved on the outside of the steel core conductor, and can also improve the adhesion and conductivity between the steel core conductor and the first protective sheath. The second alloy sheath sleeved between the first protective sheath and the second protective sheath can support and protect the steel core conductor and the first protective sheath, and can also improve the adhesion and conductivity between the first protective sheath sleeved with the steel core conductor and the second protective sheath.
[0009] The present invention comprises T-shaped clamping plates respectively installed at the edges of both ends of the first arc plate, and T-shaped clamping grooves respectively opened at the edges of both sides of the second arc plate. Since the T-shaped clamping grooves match the structure of the T-shaped clamping plates, the first arc plate and the second arc plate can be sleeved and clamped on the outside of the aluminum-clad Invar steel core alloy stranded wire, and the aluminum-clad Invar steel core alloy stranded wire can also perform disassembly, assembly, connection, repair and replacement operations on the first arc plate and the second arc plate according to usage conditions. In combination with the anti-slip clamping plate, baffle rod, baffle groove and compression spring installed on the inner side of the first arc plate and the second arc plate, the outer side of the aluminum-clad Invar steel core alloy stranded wire sleeved between the first arc plate and the second arc plate can also be limited and clamped, which can effectively improve the tightness of the connection between the locking clamp and the alloy stranded wire, and can also effectively solve the problem of loosening and falling off when the locking clamp is connected to the alloy stranded wire.
[0010] Preferably, in the above-mentioned aluminum-clad Invar steel core alloy stranded wire, the first clamping member comprises a first arc-shaped plate, and T-shaped clamping plates are installed at both end edges of the first arc-shaped plate.
[0011] Based on the above technical features, in this solution, T-shaped clamps are respectively installed at the edges of both ends of the first arc-shaped plate to enable the first clamp member to be assembled and disassembled and connected with the second clamp member.
[0012] Preferably, in the above-mentioned aluminum-clad Invar steel core alloy stranded wire, the second clamping member includes a second arc-shaped plate, and T-shaped slots are respectively provided at the edges of both sides of the second arc-shaped plate, and the T-shaped slots match the T-shaped clip plate structure, and the T-shaped slots and the T-shaped clip plate are snap-fitted.
[0013] Based on the above technical features, this solution uses T-shaped slots respectively opened on the edges of both sides of the second arc plate. Since the T-shaped slots match the T-shaped card plate structure, the second arc plate can be connected together with the first arc plate.
[0014] Preferably, in the above-mentioned aluminum-clad Invar steel core alloy stranded wire, the alloy inner core comprises a steel core conductor, and the outer portion of the steel core conductor is sheathed with a first alloy sheath.
[0015] Based on the above technical features, this solution can support and protect the outside of the steel core conductor by sleeved on the outside of the steel core conductor with the first alloy sheath, and can also improve the adhesion and conductivity between the steel core conductor and the first protective sheath.
[0016] Preferably, in the above-mentioned aluminum-clad Invar core alloy stranded wire, the outer surface of the first alloy sheath is sprayed with a corrosion-resistant layer, and a plurality of groups of first winding grooves are provided around the outer side of the alloy sheath.
[0017] Based on the above technical features, this solution can improve the corrosion resistance of the first alloy sheath itself by spraying a corrosion-resistant layer on the outer surface of the first alloy sheath.
[0018] Preferably, in the above-mentioned aluminum-clad Invar core alloy stranded wire, a second alloy sheath is arranged between the first protective sheath and the second protective sheath, a plurality of groups of second winding grooves are arranged around the inner side of the second alloy sheath, the second winding grooves have the same structure as the first winding grooves, the second winding grooves, the first winding grooves and the first protective sheath are embedded in each other, a plurality of groups of third winding grooves are arranged around the outer side of the second winding groove, the third winding grooves are embedded in each other with the first protective sheath.
[0019] Based on the above technical features, this solution can improve the adhesion between the steel core conductor and the first protective cover, and can also improve the adhesion between the first protective cover and the second protective cover through the first winding groove, the second winding groove and the third winding groove structure, so that the alloy core, the first protective cover and the second protective cover can be squeezed together.
[0020] Preferably, in the above-mentioned aluminum-clad Invar steel core alloy stranded wire, the first arc plate and the second arc plate have the same structure, the inner wall of the first arc plate is provided with two groups of anti-slip clamping plates, a baffle rod is installed in the middle part of the outer side of the anti-slip clamping plate, a baffle groove is provided on the inner side of the first arc plate close to the baffle rod, the baffle groove matches the baffle rod structure, a compression spring is connected between the baffle groove and the baffle rod, a plurality of groups of buffer grooves are provided inside the anti-slip clamping plate, and W-shaped reinforcement ribs are also provided inside the plurality of groups of buffer grooves.
[0021] Based on the above technical features, this solution can play a role of limiting and clamping the outer sides of the aluminum-clad Invar core alloy stranded wire sleeved between the first arc plate and the second arc plate through the anti-slip clamping plate, baffle rod, baffle groove and compression spring installed on the inner sides of the first arc plate and the second arc plate, which can effectively improve the tightness of the connection between the locking clamp and the alloy stranded wire, and can also effectively solve the problem of looseness and falling off when the locking clamp is connected to the alloy stranded wire.
[0022] Another technical solution proposed by the present invention is a production process of aluminum-clad Invar core alloy stranded wire, comprising the following steps:
[0023] S101: First, the steel core conductor is formed by heating and rolling to obtain a desired shape and size, and then a first alloy sheath of the same specification is sheathed on the outside of the steel core conductor to increase the adhesion between the steel core conductor and the second protective sheath.
[0024] S102: Then, a second alloy sheath is sheathed on the outer side of the second protective sheath to improve adhesion between the second protective sheath and the first protective sheath and to increase the overall conductivity of the steel core conductor.
[0025] S103: Next, through a mechanical extrusion process between the steel core conductor, the first protective sleeve, and the second protective sleeve, the steel core conductor and the first protective sleeve and the second protective sleeve can be kept in a tightly combined state to form a stranded wire.
[0026] S104: Finally, it is cooled and drawn to further improve the strength and conductivity of the aluminum-clad Invar core alloy strand.
[0027] Compared with the prior art, the present invention has the following beneficial effects:
[0028] 1. This solution can support and protect the outside of the steel core conductor by using the first alloy sheath sleeved on the outside of the steel core conductor, and can also improve the adhesion and conductivity between the steel core conductor and the first protective sheath. The second alloy sheath sleeved between the first protective sheath and the second protective sheath can support and protect the steel core conductor and the first protective sheath, and can also improve the adhesion and conductivity between the first protective sheath with the steel core conductor sleeved inside and the second protective sheath.
[0029] 2. This scheme uses T-shaped clamping plates installed at the edges of both ends of the first curved plate and T-shaped clamping grooves opened at the edges of both sides of the second curved plate. Since the T-shaped clamping grooves match the structure of the T-shaped clamping plates, the first curved plate and the second curved plate can be sleeved and clamped on the outside of the aluminum-clad Invar steel core alloy stranded wire. The aluminum-clad Invar steel core alloy stranded wire can also be disassembled, connected, repaired and replaced on the first curved plate and the second curved plate according to usage. In conjunction with the anti-slip clamping plate, baffle rod, baffle groove and compression spring installed on the inner side of the first curved plate and the second curved plate, the outer side of the aluminum-clad Invar steel core alloy stranded wire sleeved between the first curved plate and the second curved plate can be limited and clamped, which can effectively improve the tightness of the connection between the locking clamp and the alloy stranded wire, and can also effectively solve the problem of loosening and falling off when the locking clamp is connected to the alloy stranded wire. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.
[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0032] Figure 2 It is a schematic diagram of disassembling the locking clamp of the present invention;
[0033] Figure 3 It is a schematic diagram of the steel core conductor structure of the present invention;
[0034] Figure 4 It is a schematic diagram of the structure of the second alloy sheath of the present invention;
[0035] Figure 5 It is a schematic diagram of the first curved plate structure of the present invention.
[0036] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0037] 100, alloy stranded wire; 101, alloy inner core; 101a, steel core conductor; 101b, first alloy sheath; 101b-1, corrosion-resistant layer; 101b-2, first winding groove; 102, first protective sleeve; 103, second protective sleeve; 200, locking clamp; 201, first clamp; 201a, first arc plate; 201a-1, anti-slip clamping sheet; 201a-2, stop rod; 201a-3, stop groove; 201a-4, compression spring; 201a-5, buffer groove; 201a-6, W-shaped reinforcement rib; 201b, T-shaped clamp; 202, second clamp; 202a, second arc plate; 202b, T-shaped clamp groove; 300, second alloy sheath; 301, second winding groove; 302, third winding groove. DETAILED DESCRIPTION
[0038] 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.
[0039] See also Figure 1-2In the invention, an aluminum-clad Invar core alloy stranded wire comprises an alloy stranded wire 100 and a locking clamp 200. The outer portion of the alloy stranded wire 100 is provided with a locking clamp 200. The alloy stranded wire 100 comprises an alloy inner core 101. The outer portion of the alloy inner core 101 is provided with a first protective sleeve 102. The outer portion of the first protective sleeve 102 is provided with a second protective sleeve 103. The locking clamp 200 comprises a first clamp component 201. A second clamp component 202 is provided on one side of the first clamp component 201.
[0040] The first clamping member 201 includes a first arc-shaped plate 201a, and T-shaped clamping plates 201b are installed at the edges of both ends of the first arc-shaped plate 201a. The T-shaped clamping plates 201b respectively installed at the edges of both ends of the first arc-shaped plate 201a are used for the disassembly and assembly connection between the first clamping member 201 and the second clamping member 202. The second clamping member 202 includes a second arc-shaped plate 202a, and T-shaped slots 202b are respectively opened at the edges of both sides of the second arc-shaped plate 202a. The T-shaped slots 202b match the structure of the T-shaped clamping plates 201b, and the T-shaped slots 202b and the T-shaped clamping plates 201b are snap-fitted. Through the T-shaped slots 202b respectively opened at the edges of both sides of the second arc-shaped plate 202a, the second arc-shaped plate 202a can be snap-fitted to the first arc-shaped plate 201a because the T-shaped slots 202b match the structure of the T-shaped clamping plates 201b.
[0041] See also Figure 3-4 In the present invention, the alloy core 101 includes a steel core conductor 101a, and the outer part of the steel core conductor 101a is provided with a first alloy sheath 101b. The first alloy sheath 101b provided on the outer part of the steel core conductor 101a can support and protect the outer part of the steel core conductor 101a, and can also improve the adhesion and conductivity between the steel core conductor 101a and the first protective sheath 102. The outer surface of the first alloy sheath 101b is sprayed with a corrosion-resistant layer 101b-1, and a plurality of groups of first winding grooves 101b-2 are also provided around the outer side of the alloy sheath 101b. The corrosion-resistant layer 101b-1 sprayed on the outer surface of the first alloy sheath 101b can improve the corrosion resistance of the first alloy sheath 101b itself.
[0042] A second alloy sheath 300 is sleeved between the first protective sheath 102 and the second protective sheath 103, and a plurality of groups of second winding grooves 301 are provided around the inner side of the second alloy sheath 300, and the second winding grooves 301 have the same structure as the first winding grooves 101b-2, and the second winding grooves 301, the first winding grooves 101b-2 and the first protective sheath 102 are embedded in each other, and a plurality of groups of third winding grooves 302 are provided around the outer side of the second winding grooves 301, and the third winding grooves 302 and the first protective sheath 102 are embedded in each other, and the adhesion between the steel core conductor 101a and the first protective sheath 102 and the adhesion between the first protective sheath 102 and the second protective sheath 103 can be improved through the structure of the first winding grooves 101b-2, the second winding grooves 301 and the third winding grooves 302, and the alloy inner core 101, the first protective sheath 102 and the second protective sheath 103 can be squeezed and fitted together.
[0043] See also Figure 5 In the embodiment, the first arc plate 201a and the second arc plate 202a have the same structure. Two groups of anti-skid clamping sheets 201a-1 are arranged on the inner wall of the first arc plate 201a. A blocking rod 201a-2 is installed in the middle of the outer side of the anti-skid clamping sheet 201a-1. A blocking groove 201a-3 is arranged on the inner side of the first arc plate 201a close to the blocking rod 201a-2. The blocking groove 201a-3 matches the structure of the blocking rod 201a-2. A compression spring 201a-4 is connected between the blocking groove 201a-3 and the blocking rod 201a-2. A plurality of buffer grooves 201a-5, a plurality of buffer grooves 201a-6 and a plurality of buffer grooves 201a-7 are arranged inside the anti-skid clamping sheet 201a-1. A W-shaped reinforcing rib 201a-6 is also provided inside 01a-5. By means of the anti-slip clamping piece 201a-1, the baffle rod 201a-2, the baffle groove 201a-3 and the compression spring 201a-4 installed on the inner side of the first arc plate 201a and the second arc plate 202a, the outer side of the aluminum-clad Invar core alloy stranded wire sleeved between the first arc plate 201a and the second arc plate 202a can be limited and clamped, which can effectively improve the tightness of the connection between the locking clamp 200 and the alloy stranded wire 100, and can also effectively solve the problem of loosening and falling off when the locking clamp 200 is connected to the alloy stranded wire 100.
[0044] In order to better demonstrate an aluminum-clad Invar steel core alloy stranded wire, this embodiment now proposes a production process of an aluminum-clad Invar steel core alloy stranded wire, including the following steps:
[0045] S101: First, the steel core conductor 101a is formed by heating and rolling to obtain a desired shape and size, and then a first alloy sheath 101b of the same specification is sheathed on the outside of the steel core conductor 101a to increase the adhesion between the steel core conductor 101a and the second protective sheath 103.
[0046] S102: Then, a second alloy sheath 300 is sheathed on the outer side of the second protective sheath 103 to improve the adhesion between the second protective sheath 103 and the first protective sheath 102 and to increase the overall conductivity of the steel core conductor 101a.
[0047] S103: Next, through the mechanical extrusion process between the steel core conductor 101a, the first protective sheath 102, and the second protective sheath 103, the steel core conductor 101a and the first protective sheath 102 and the second protective sheath 103 can be kept in a tightly combined state to form a stranded wire.
[0048] S104: Finally, it is cooled and drawn to further improve the strength and conductivity of the aluminum-clad Invar core alloy strand.
[0049] Working principle: This solution can support and protect the outside of the steel core conductor 101a by using the first alloy sheath 101b sleeved on the outside of the steel core conductor 101a, and can also improve the adhesion and conductivity between the steel core conductor 101a and the first protective sheath 102. The second alloy sheath 300 sleeved between the first protective sheath 102 and the second protective sheath 103 can support and protect the steel core conductor 101a and the first protective sheath 102, and can also improve the adhesion and conductivity between the first protective sheath 102 with the steel core conductor 101a sleeved inside and the second protective sheath 103;
[0050] In this solution, T-shaped clamping plates 201b are respectively installed at the edges of both ends of the first curved plate 201a, and T-shaped clamping grooves 202b are respectively opened at the edges of both sides of the second curved plate 202a. Since the T-shaped clamping grooves 202b match the structures of the T-shaped clamping plates 201b, the first curved plate 201a and the second curved plate 202a can be sleeved and clamped on the outside of the aluminum-clad invar steel core alloy stranded wire, and the aluminum-clad invar steel core alloy stranded wire can also disassemble, connect, repair and replace the first curved plate 201a and the second curved plate 202a according to the usage conditions, and cooperate with The anti-slip clamping plate 201a-1, the baffle rod 201a-2, the baffle groove 201a-3 and the compression spring 201a-4 installed on the inner side of the first arc plate 201a and the second arc plate 202a can also play a role of limiting and clamping the outer side of the aluminum-clad Invar core alloy stranded wire sleeved between the first arc plate 201a and the second arc plate 202a, which can effectively improve the tightness of the connection between the locking clamp 200 and the alloy stranded wire 100, and can also effectively solve the problem of loosening and falling off when the locking clamp 200 is connected to the alloy stranded wire 100.
[0051] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0052] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.
Claims
1. An aluminum-clad Invar core alloy stranded wire, comprising an alloy stranded wire (100) and a locking clamp (200), wherein the outer sleeve of the alloy stranded wire (100) is provided with a locking clamp (200), characterized in that: The alloy stranded wire (100) comprises an alloy inner core (101), a first protective sleeve (102) is sheathed around the outer periphery of the alloy inner core (101), and a second protective sleeve (103) is sheathed around the outer periphery of the first protective sleeve (102); The locking clamp (200) comprises a first clamp component (201), and a second clamp component (202) is provided on one side of the first clamp component (201).
2. The aluminum-clad Invar core alloy stranded wire according to claim 1, characterized in that: The first clamping member (201) comprises a first arc-shaped plate (201a), and T-shaped clamping plates (201b) are installed at both end edges of the first arc-shaped plate (201a).
3. The aluminum-clad Invar core alloy stranded wire according to claim 2, characterized in that: The second clamping member (202) comprises a second arc-shaped plate (202a), and T-shaped slots (202b) are respectively provided at the edges of both sides of the second arc-shaped plate (202a), and the T-shaped slots (202b) match the structure of the T-shaped clamping plate (201b), and the T-shaped slots (202b) and the T-shaped clamping plate (201b) are snap-fitted.
4. The aluminum-clad Invar core alloy stranded wire according to claim 3, characterized in that: The alloy inner core (101) comprises a steel core conductor (101a), and the outer portion of the steel core conductor (101a) is covered with a first alloy sheath (101b).
5. The aluminum-clad Invar core alloy stranded wire according to claim 4, characterized in that: The outer surface of the first alloy sheath (101b) is sprayed with a corrosion-resistant layer (101b-1), and a plurality of groups of first winding grooves (101b-2) are provided around the outer side of the alloy sheath (101b).
6. The aluminum-clad Invar core alloy stranded wire according to claim 5, characterized in that: A second alloy sheath (300) is sleeved between the first protective sheath (102) and the second protective sheath (103); a plurality of groups of second winding grooves (301) are provided around the inner side of the second alloy sheath (300); the second winding grooves (301) have the same structure as the first winding grooves (101b-2); the second winding grooves (301), the first winding grooves (101b-2) and the first protective sheath (102) are embedded in each other; a plurality of groups of third winding grooves (302) are provided around the outer side of the second winding groove (301); the third winding grooves (302) and the first protective sheath (102) are embedded in each other.
7. The aluminum-clad Invar core alloy stranded wire according to claim 6, characterized in that: The first arc plate (201a) and the second arc plate (202a) have the same structure. The inner wall of the first arc plate (201a) is provided with two groups of anti-slip clamping plates (201a-1). A blocking rod (201a-2) is installed in the middle part of the outer side of the anti-slip clamping plate (201a-1). A blocking groove (201a-3) is provided on the inner side of the first arc plate (201a) close to the blocking rod (201a-2). The blocking groove (201a-3) matches the structure of the blocking rod (201a-2). A compression spring (201a-4) is connected between the blocking groove (201a-3) and the blocking rod (201a-2). A plurality of buffer grooves (201a-5) are provided inside the anti-slip clamping plate (201a-1), and W-shaped reinforcing ribs (201a-6) are also provided inside the plurality of buffer grooves (201a-5).
8. A process for producing the aluminum-clad Invar core alloy stranded wire as claimed in any one of claims 1 to 7, comprising the following steps: S101: First, the steel core conductor (101a) is formed by heating and rolling to obtain a desired shape and size, and then a first alloy sheath (101b) of the same specification is sheathed on the outside of the steel core conductor (101a) to increase the adhesion between the steel core conductor (101a) and the second protective sheath (103). S102: Then, a second alloy sheath (300) is sheathed on the outer side of the second protective sheath (103) to provide adhesion between the second protective sheath (103) and the first protective sheath (102) and to increase the overall conductivity of the steel core conductor (101a). S103: Next, through the mechanical extrusion process between the steel core conductor (101a), the first protective sleeve (102), and the second protective sleeve (103), the steel core conductor (101a) and the first protective sleeve (102), and the second protective sleeve (103) can be kept in a tightly combined state to form a stranded wire. S104: Finally, it is cooled and drawn to further improve the strength and conductivity of the aluminum-clad Invar core alloy strand.