Corrosion-resistant strand and process for its manufacture

Abstract

The application belongs to the technical field of stranded wire and discloses an anti-corrosion stranded wire and a processing technology thereof. The anti-corrosion stranded wire comprises multiple high-strength carbon steel wires arranged in parallel and closely, an aluminum-steel combined penetration layer is extruded and covered on each high-strength carbon steel wire, and multiple aluminum stranded wires are uniformly and spirally wound outside the multiple high-strength carbon steel wires. According to weight percentage, the aluminum-steel combined penetration layer comprises the following components: aluminum-based cerium-rich rare earth 0.12-0.23%, aluminum-based intermediate alloy 0.18-0.27%, and the balance is aluminum. In the application, the electrician aluminum is extruded and covered on the high-strength carbon steel wire by high temperature and high pressure, so that an aluminum-steel combined penetration layer with a thickness of about 8 µm is formed between the aluminum and the steel. The aluminum-steel combined penetration layer serves as a buffer layer, so that the originally distinctive aluminum and steel can live in harmony, there is no potential difference, and the electrochemical corrosion can be effectively alleviated or even eliminated, so that the service life of the steel-cored aluminum stranded wire is sufficiently prolonged and the probability of safety accidents is reduced.

Description

Technical Field

[0001] This invention relates to the field of stranded wire technology, and in particular to a corrosion-resistant stranded wire and its processing technology. Background Technology

[0002] Steel-cored aluminum stranded wire is widely used in power transmission lines due to its good conductivity, high mechanical strength, and long span. However, it is exposed to the air for a long time, especially in heavily polluted areas, where it suffers severe chemical and electrochemical corrosion, which directly affects the service life of the stranded wire.

[0003] On the one hand, the potential difference between the steel core and the aluminum wire leads to electrochemical corrosion, resulting in the complete corrosion of the galvanized protective layer of the steel core, followed by the gradual corrosion of the aluminum. On the other hand, under the influence of polluting media, the aluminum wire is prone to intergranular corrosion, which increases the resistance of the stranded wire, raises the temperature, and accelerates the corrosion rate. This cycle can easily lead to safety accidents. To extend the service life of steel-cored aluminum stranded wire and reduce the probability of safety accidents, it is urgent to develop a steel-cored aluminum stranded wire with high corrosion resistance. Summary of the Invention

[0004] To address the above problems, this invention provides a corrosion-resistant stranded wire and its processing technology.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a corrosion-resistant stranded wire, comprising multiple parallel and closely arranged high-strength carbon steel wires, each of which is extruded with an aluminum-steel bonded permeation layer, and multiple aluminum stranded wires are uniformly spirally wound around the outside of the multiple high-strength carbon steel wires; wherein, by weight percentage, the aluminum-steel bonded permeation layer comprises the following components: 0.12-0.23% aluminum-based cerium-rich rare earth, 0.18-0.27% aluminum-based intermediate alloy, and the balance being aluminum.

[0006] By adopting the above technical solution, the aluminum-steel bonded penetration layer is made of aluminum-based cerium-rich rare earth and aluminum-based master alloy. A conductive balance is formed between the rare earth and the corrosion-resistant alloy, which improves the aluminum's resistance to chemical corrosion. Specifically, cerium-rich rare earth is added during aluminum smelting to continuously reduce the silicon content in the molten aluminum, thus increasing its conductivity. Then, corrosion-resistant alloying elements (i.e., the constituent elements of the aluminum-based master alloy) are added. The addition of these elements reduces the aluminum's conductivity. A solution is found that satisfies both conductivity ≥ 61% IACS and resistivity ≤ 0.028264 Ω·mm. 2 / m, and a reasonable balance point that can improve corrosion resistance (i.e., 0.12-0.23% aluminum-based cerium-rich rare earth, 0.18-0.27% aluminum-based master alloy, with the balance being aluminum). This application uses high temperature and high pressure to extrude electrical aluminum onto high-strength carbon steel wire, forming an aluminum-steel bonded permeation layer. This layer acts as a buffer, allowing the originally distinct aluminum and steel to coexist harmoniously. Without a potential difference, electrochemical corrosion can be effectively mitigated or even eliminated, significantly extending the service life of the steel-cored aluminum stranded wire and reducing the probability of safety accidents.

[0007] Furthermore, by weight percentage, the aluminum-based master alloy comprises the following components: 50% aluminum-based niobium and 50% MB11; wherein the niobium content in the aluminum-based niobium is 0.009-0.0135 wt%; the constituent elements of MB11 include: niobium, zirconium, boron, titanium, and aluminum, with the following content: 0.15-0.3 wt% niobium, 0.05-0.15 wt% zirconium, 0.01-0.03 wt% boron, 0.02-0.05 wt% titanium, and the balance being aluminum.

[0008] Furthermore, the thickness of the aluminum-steel bonded permeation layer is 8-10µm.

[0009] By adopting the above technical solutions, niobium, as the main corrosion-resistant element, can refine grains and enhance the stability of the passivation film; zirconium and niobium (Nb) work synergistically to improve grain boundary corrosion resistance; boron, as a purifier of iron impurities (FeB6 precipitate) in molten aluminum, reduces electron scattering centers and improves conductivity; titanium can reduce the surface tension of molten aluminum, promote wettability with the steel core, optimize the formation of the 8-10µm aluminum-steel bonding penetration layer, eliminate the potential difference between aluminum and steel, and alleviate or even eliminate electrochemical corrosion between aluminum and steel; aluminum-based niobium can form the Al3Nb phase and strengthen the grain boundary structure; MB11 can purify impurities, optimize the passivation film, and synergistically enhance corrosion resistance; when aluminum-based niobium and MB11 are added in equal proportions, they produce a synergistic effect, which can offset the loss of conductivity and effectively enhance corrosion resistance.

[0010] This application also discloses a processing technology for corrosion-resistant stranded wire, including the following steps:

[0011] S1. Weigh out aluminum-based cerium-rich rare earth elements, ensuring that their weight percentage in the aluminum-steel bonded permeation layer is 0.12-0.23%.

[0012] S2. Prepare an aluminum-based master alloy by mixing 50% aluminum-based niobium and 50% MB11, wherein:

[0013] The niobium content in aluminum-based niobium is 0.009-0.0135 wt%, while in MB11 it is 0.15-0.3 wt% niobium, 0.05-0.15 wt% zirconium, 0.01-0.03 wt% boron, 0.02-0.05 wt% titanium, with the balance being aluminum;

[0014] S3. Select high-strength carbon steel wire, soak it in an alkaline cleaning agent at 50℃ for 10 minutes, then rinse it with clean water, then pickle it in a hydrochloric acid solution at 15% concentration and 30℃ for 5 minutes, and finally rinse it with clean water and dry it.

[0015] S4. Add the raw materials obtained from S1 and S2 to the melting furnace and melt them at 730℃. Stir for 22 minutes and pass the steel wire obtained from S3 through the extrusion die at a speed of 3m / min. The equipment pressure is 9MPa and the temperature is 700℃ to form an 8-10µm aluminum-steel bonded permeation layer.

[0016] S5. Feed the electrical aluminum into a multi-pass continuous wire drawing machine to draw aluminum wire at a speed of 20m / min, a speed of 15m / min, and a tension of 40N.

[0017] S6. The drawn aluminum wire is fed into the stranding machine. When stranding, the helical pitch is 10-15 times the diameter of the aluminum strand. The aluminum strand is wound at a speed of 12m / min and a tension of 60N.

[0018] Furthermore, the stranding machine includes a base, on the top of which are fixedly mounted in sequence a fixed plate, a first mounting seat, a second mounting seat, and a third mounting seat. There are two first mounting seats, with a mounting roller rotatably mounted between the two first mounting seats. A synchronous wheel is rotatably mounted on the second mounting seat. The base, the fixed plate, and the second mounting seat are all equipped with a power mechanism for driving the mounting roller and the synchronous wheel to rotate synchronously. The mounting roller and the synchronous wheel both have a central hole through which carbon steel wires pass. Multiple sets of mounting mechanisms for mounting aluminum wires are evenly arranged on the roller surface of the mounting roller. The synchronous wheel has through holes evenly distributed around its axis for aluminum wires to pass through. The third mounting seat has through holes for passing the stranded carbon steel wires and aluminum wires. The top of the base is also equipped with a pulling mechanism for pulling the stranded carbon steel wires and aluminum wires forward.

[0019] By adopting the above technical solution, the power mechanism drives the installation roller and the synchronous wheel to rotate synchronously, and the pulling mechanism pulls the stranded carbon steel wire and aluminum wire forward, so that the aluminum wire on the installation mechanism gradually winds around the carbon steel wire after passing through the synchronous wheel to complete the stranding of the anti-corrosion stranded wire.

[0020] Furthermore, an arc-shaped plate is fixed coaxially to the surface of the mounting roller. The mounting mechanism includes a mounting assembly and a storage assembly. Two sets of mounting assemblies are located near both ends of the arc-shaped plate. Each mounting assembly includes an L-shaped plate fixed to the top of the arc-shaped plate and side plates positioned at the top of the horizontal section of the L-shaped plate. The storage assembly includes a connecting plate positioned between the two side plates in the same mounting unit. Two connecting plates are provided and parallel to each other. The storage assembly also includes a storage roller rotatably mounted between the two connecting plates for winding and storing aluminum wire. Two parallel side plates are perforated on the side plates. The inclined trough has a connecting rod that slides and engages with the inclined trough on the side of the connecting plate away from the storage roller. The mounting mechanisms are arranged in pairs and are mirror images of each other. Multiple pairs of mounting mechanisms are evenly distributed around the mounting roller. Mounting blocks are fixed on both the side of the connecting rod away from the axis of the mounting roller and the side of the inclined trough away from the axis of the mounting roller. A retaining spring is fixed between two mounting blocks. The mounting roller has a mounting cavity, which contains a driving mechanism for driving the storage rollers in the paired mounting mechanisms away from each other. Under the action of the driving mechanism, the storage rollers in the multiple pairs of mounting mechanisms around the mounting roller move away from the axis of the mounting roller synchronously.

[0021] By adopting the above technical solution, the tension requirements of different types of stranded wires wound on steel wires vary. According to the needs, the staff can drive the storage rollers in the paired installation mechanism to move away from each other through the drive mechanism. At the same time, the storage rollers move away from the axis of the installation roller under the action of the drive mechanism, so that the relative distance between the two storage rollers and the distance from the axis of the installation roller can be adjusted. This allows the aluminum wire that passes around the other storage roller from the storage roller near the fixed plate to be tightened, so as to adjust the tension of the aluminum wire and thus process stranded wires with different tensions.

[0022] Furthermore, the drive mechanism includes a transmission assembly and a drive assembly. The number of transmission assemblies is equal to the number of mounting mechanisms and their positions correspond one-to-one. The transmission assembly includes a T-shaped rod that passes through the side wall of the mounting roller and is slidably engaged, a push rod fixed to one end of the T-shaped rod located in the mounting cavity, a push block fixed to the end of the T-shaped rod away from the axis of the mounting roller, and a push plate fixed to one side of the connecting plate. The T-shaped rod is located in the middle of the two sets of mounting mechanisms in pairs. There are two push blocks that are mirror images of each other. The cross-section of the push block and the cross-section of the push plate are both right-angled trapezoids. The sides of the push block and the push plate that are close to each other are inclined surfaces and abut against each other. The drive assembly acts on the push rods in the multiple sets of transmission assemblies and simultaneously controls the multiple sets of T-shaped rods to move toward the side that is close to or away from the axis of the mounting roller.

[0023] Furthermore, the drive assembly includes a sleeve rotatably mounted on the inner wall of the mounting cavity on the side away from the fixed plate, a rotating plate fixed to the end of the sleeve near the fixed plate, an inner driven gear fixedly sleeved on the sleeve, a drive motor fixed to the inner wall of the mounting cavity on the side away from the fixed plate, and an inner driving gear fixed to the output end of the drive motor and meshing with the inner driven gear. The rotating plate also has a central hole through which a carbon steel wire passes. The rotating plate also has an arc-shaped hole through which push rods in multiple sets of transmission assemblies slide. The arc-shaped hole is eccentrically positioned with respect to the central hole, and the end of the arc-shaped hole near the central hole is positioned close to the axis of the central hole.

[0024] By adopting the above technical solution, after the drive motor is started, the drive motor drives the inner drive gear fixed to its output end to rotate, thereby causing the inner driven gear meshing with the inner drive gear, the sleeve fixed to the inner driven gear, and the rotating plate fixed to the sleeve to rotate. Since the multiple arc-shaped holes on the rotating plate are respectively in sliding engagement with the push rods in multiple sets of transmission components, the multiple T-shaped rods move synchronously toward the side closer to or away from the axis of the mounting roller under the action of their respective push rods, so that the relative distance between the two paired storage rollers can be adjusted to adjust the tension of the aluminum wire to a suitable size.

[0025] Furthermore, a dovetail block is fixed to the bottom of the side plate, and a sliding groove is provided at the top of the horizontal section of the L-shaped plate for the dovetail block to slide. A positioning sliding hole perpendicular to and connected to the sliding groove and an installation hole fixed to and connected to the side of the positioning sliding hole away from the sliding groove are provided through the horizontal section of the L-shaped plate. A positioning assembly for fixing the side plate is provided on the horizontal section of the L-shaped plate. The positioning assembly includes a positioning rod that slides with the positioning sliding hole and abuts against the side of the dovetail block away from the storage roller, a connecting column fixed to the end of the positioning rod away from the sliding groove, an end plate fixed to the end of the connecting column away from the sliding groove, and a positioning spring sleeved on the connecting column and fixed between the inner wall of the installation hole and the end plate.

[0026] By adopting the above technical solution, when the aluminum wire on the storage roller is used up, the staff only needs to pull the end plate to make the positioning rod retract into the positioning sliding hole, so that the dovetail block slides along the slide groove, which makes it easy to disassemble the storage roller for replacement with a storage roller with a new aluminum wire coil.

[0027] Furthermore, the power mechanism includes a controller fixed to the top of the base, a drive rod rotatably mounted on a fixed plate, a first drive gear fixed to the end of the drive rod, a first power motor fixed to the fixed plate and fixed to one end of the drive rod, a first driven gear rotatably mounted to one end of the mounting roller and meshing with the first drive gear, a second drive gear rotatably mounted on a second mounting base, a second power motor fixed to the second mounting base and driving the second drive gear to rotate, and a second driven gear fixedly sleeved on a synchronous pulley and meshing with the second drive gear. The first power motor, the second power motor, and the drive motor are all electrically connected to the controller.

[0028] By adopting the above technical solution, the staff can control the first power motor and the second power motor to run synchronously through the controller. In this embodiment, the first driven gear and the second driven gear are the same size, and the first driving gear and the second driving gear are the same size, so that the mounting roller and the synchronous wheel rotate synchronously. Under the action of the pulling mechanism, the aluminum wire released by the mounting roller passes through the hole on the synchronous wheel and is twisted onto the carbon steel wire.

[0029] In summary, the present invention has the following beneficial effects:

[0030] 1. This application uses high temperature and high pressure to extrude electrical aluminum onto high-strength carbon steel wire, forming an aluminum-steel bonding and penetration layer of about 8µm thickness between the aluminum and steel. The aluminum-steel bonding and penetration layer acts as a buffer layer, allowing the originally distinct aluminum and steel to coexist harmoniously. Without the potential difference, electrochemical corrosion can be effectively alleviated or even eliminated, which significantly extends the service life of the steel-cored aluminum stranded wire and reduces the probability of safety accidents.

[0031] 2. In this application, niobium, as the main corrosion-resistant element, can refine grains and enhance the stability of the passivation film; zirconium and niobium (Nb) work synergistically to improve grain boundary corrosion resistance; boron, as a purifier of iron impurities (FeB6 precipitate) in molten aluminum, reduces electron scattering centers and improves conductivity; titanium can reduce the surface tension of molten aluminum, promote wettability with the steel core, optimize the formation of the 8-10µm aluminum-steel bonding penetration layer, eliminate the potential difference between aluminum and steel, and alleviate or even eliminate electrochemical corrosion between aluminum and steel; aluminum-based niobium can form the Al3Nb phase and strengthen the grain boundary structure; MB11 can purify impurities, optimize the passivation film, and synergistically enhance corrosion resistance; the equal addition of aluminum-based niobium and MB11 produces a synergistic effect, which can offset the loss of conductivity and effectively enhance corrosion resistance;

[0032] 3. In this application, depending on the type of stranded wire, the required tension of the wire wound on the steel wire is different. The operator can drive the storage rollers in the paired installation mechanism away from each other through the drive mechanism as needed. At the same time, the storage rollers are driven away from the axis of the installation roller simultaneously, so that the relative distance between the two storage rollers and the distance between them and the axis of the installation roller can be adjusted. This allows the aluminum wire that passes from the storage roller near the fixed plate to the other storage roller to be tightened, so as to adjust the tension of the aluminum wire and thus process stranded wires with different tensions. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0034] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0035] Figure 3 This is a schematic diagram illustrating the structure of the power mechanism in an embodiment of the present invention;

[0036] Figure 4 yes Figure 3 A schematic diagram of a local structure from another perspective;

[0037] Figure 5 This is a schematic diagram illustrating the internal structure of the mounting roller in an embodiment of the present invention;

[0038] Figure 6 yes Figure 5 Enlarged view of point B in the middle;

[0039] Figure 7 This is a schematic diagram illustrating the T-shaped rod and its connecting structure in an embodiment of the present invention;

[0040] Figure 8 This is a schematic diagram illustrating the structure of the clamping spring in an embodiment of the present invention;

[0041] Figure 9 This is a structural schematic diagram of an embodiment of the present invention used to highlight the positioning component;

[0042] Figure 10 yes Figure 9 Enlarged view of point C in the middle;

[0043] Figure 11 This is a schematic diagram illustrating the connection structure between the aluminum stranded wire and the synchronous pulley in an embodiment of the present invention.

[0044] In the diagram: 1. High-strength carbon steel wire; 11. Aluminum-steel bonded permeation layer; 12. Aluminum stranded wire; 2. Base; 21. Fixing plate; 22. First mounting seat; 23. Second mounting seat; 24. Third mounting seat; 241. Through hole; 3. Mounting roller; 31. Arc plate; 32. Mounting cavity; 4. Synchronous pulley; 41. Perforation;

[0045] 5. Power mechanism; 51. Controller; 52. Drive rod; 53. First drive gear; 54. First power motor; 55. First driven gear; 56. Second drive gear; 57. Second power motor; 58. Second driven gear; 6. Center hole;

[0046] 7. Mounting mechanism; 71. Mounting components; 711. L-shaped plate; 7111. Slide groove; 7112. Positioning slide hole; 7113. Mounting hole; 712. Side plate; 7121. Inclined groove; 7122. Dovetail block;

[0047] 72. Storage component; 721. Connecting plate; 7211. Connecting rod; 722. Storage roller; 8. Mounting block; 81. Clamping spring;

[0048] 9. Drive mechanism; 91. Transmission assembly; 911. T-shaped rod; 912. Push rod; 913. Push block; 914. Push plate;

[0049] 92. Drive assembly; 921. Sleeve; 922. Rotating plate; 9221. Arc-shaped hole; 923. Internal driven gear; 924. Drive motor; 925. Internal driving gear;

[0050] 10. Positioning assembly; 101. Positioning rod; 102. Connecting post; 103. End plate; 104. Positioning spring. Detailed Implementation

[0051] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0052] like Figure 1-11As shown in the embodiment of this application, an anti-corrosion stranded wire is disclosed, comprising multiple parallel and closely arranged high-strength carbon steel wires 1, each of which is extruded with an aluminum-steel bonded permeation layer 11, the thickness of which is 8-10µm. Multiple aluminum stranded wires 12 are uniformly spirally wound around the outer side of the multiple high-strength carbon steel wires 1; wherein, by weight percentage, the aluminum-steel bonded permeation layer 11 comprises the following components: 0.12-0.23% aluminum-based cerium-rich rare earth, 0.18-0.27% aluminum-based master alloy, and the balance being aluminum.

[0053] The aluminum-steel bonded permeation layer 11 is made of aluminum-based cerium-rich rare earth and aluminum-based master alloy. A conductive balance is formed between the rare earth and the corrosion-resistant alloy, which improves the aluminum's resistance to chemical corrosion. Specifically, cerium-rich rare earth is added during aluminum smelting to continuously reduce the silicon content in the molten aluminum, thus increasing its conductivity. Then, corrosion-resistant alloying elements (i.e., the constituent elements of the aluminum-based master alloy) are added. The addition of these elements reduces the aluminum's conductivity. A solution is found that satisfies both conductivity ≥ 61% IACS and resistivity ≤ 0.028264 Ω·mm. 2 / m, and a reasonable balance point that can improve corrosion resistance (i.e., 0.12-0.23% aluminum-based cerium-rich rare earth, 0.18-0.27% aluminum-based master alloy, and the balance being aluminum). This application uses high temperature and high pressure to extrude electrical aluminum onto high-strength carbon steel wire 1, so that an aluminum-steel bonding and penetration layer 11 with a thickness of about 8µm is formed between aluminum and steel. The aluminum-steel bonding and penetration layer 11 acts as a buffer layer, so that the originally distinct aluminum and steel can coexist harmoniously. Without potential difference, electrochemical corrosion can be effectively alleviated or even eliminated, which greatly extends the service life of the steel-cored aluminum stranded wire 12 and reduces the probability of safety accidents.

[0054] By weight percentage, the aluminum-based master alloy comprises the following components: 50% aluminum-based niobium and 50% MB11; wherein the niobium content in the aluminum-based niobium is 0.009-0.0135 wt%; the constituent elements of MB11 include: niobium, zirconium, boron, titanium and aluminum, with the following content: 0.15-0.3 wt% niobium, 0.05-0.15 wt% zirconium, 0.01-0.03 wt% boron, 0.02-0.05 wt% titanium, and the balance being aluminum.

[0055] Niobium, as the main corrosion-resistant element, can refine grains and enhance the stability of the passivation film; zirconium and niobium (Nb) work synergistically to improve grain boundary corrosion resistance; boron, as a purifier of iron impurities (FeB6 precipitate) in molten aluminum, reduces electron scattering centers and improves conductivity; titanium can reduce the surface tension of molten aluminum, promote wettability with the steel core, optimize the formation of the 8-10µm aluminum-steel bonding penetration layer 11, eliminate the potential difference between aluminum and steel, and alleviate or even eliminate electrochemical corrosion between aluminum and steel; aluminum-based niobium can form the Al3Nb phase and strengthen the grain boundary structure; MB11 can purify impurities, optimize the passivation film, and synergistically enhance corrosion resistance; when aluminum-based niobium and MB11 are added in equal proportions, they produce a synergistic effect, which can offset the loss of conductivity and effectively enhance corrosion resistance.

[0056] This embodiment also discloses a processing technology for corrosion-resistant stranded wire, including the following steps:

[0057] S1. Weigh aluminum-based cerium-rich rare earth elements, ensuring that their weight percentage in the aluminum-steel bonded permeation layer 11 is 0.12-0.23%;

[0058] S2. Prepare an aluminum-based master alloy by mixing 50% aluminum-based niobium and 50% MB11, wherein:

[0059] The niobium content in aluminum-based niobium is 0.009-0.0135 wt%, while in MB11 it is 0.15-0.3 wt% niobium, 0.05-0.15 wt% zirconium, 0.01-0.03 wt% boron, 0.02-0.05 wt% titanium, with the balance being aluminum;

[0060] S3. Select high-strength carbon steel wire 1, soak it in an alkaline cleaning agent at 50℃ for 10 minutes, then rinse it with clean water, then pickle it in a hydrochloric acid solution with a concentration of 15% and a temperature of 30℃ for 5 minutes, and finally rinse it with clean water and dry it.

[0061] S4. Add the raw materials obtained from S1 and S2 to the melting furnace, melt at 730℃, stir for 22 minutes, and pass the steel wire obtained from S3 through the extrusion die at a speed of 3m / min. The equipment pressure is 9MPa and the temperature is 700℃ to form an 8-10µm aluminum-steel bonded permeation layer 11.

[0062] S5. Feed the electrical aluminum into a multi-pass continuous wire drawing machine to draw aluminum wire at a speed of 20m / min, a speed of 15m / min, and a tension of 40N.

[0063] S6. The drawn aluminum wire is fed into the stranding machine. When stranding, the helical pitch is 10-15 times the diameter of the aluminum strand 12. The aluminum strand 12 is wound at a speed of 12m / min and a tension of 60N.

[0064] The stranding machine includes a base 2. A fixed plate 21, a first mounting base 22, a second mounting base 23, and a third mounting base 24 are sequentially fixed to the top of the base 2. Two first mounting bases 22 are provided, with a mounting roller 3 rotatably mounted between the two first mounting bases 22. A synchronous wheel 4 is rotatably mounted on the second mounting base 23. A power mechanism 5 for driving the mounting roller 3 and the synchronous wheel 4 to rotate synchronously is jointly mounted on the base 2, the fixed plate 21, and the second mounting base 23. Both the mounting roller 3 and the synchronous wheel 4 have a central hole 6 through which carbon steel wires pass. Multiple sets of mounting mechanisms 7 for mounting aluminum wires are evenly arranged on the roller surface of the mounting roller 3. Through holes 41 evenly distributed around the axis of the synchronous wheel 4 and through which aluminum wires pass. The third mounting base 24 has through holes 241 through which the stranded carbon steel wires and aluminum wires pass. A pulling mechanism (existing technology, not shown in the figure) for pulling the stranded carbon steel wires and aluminum wires forward is also provided on the top of the base 2.

[0065] The power mechanism 5 drives the mounting roller 3 and the synchronous wheel 4 to rotate synchronously. The pulling mechanism pulls the stranded carbon steel wire and aluminum wire forward, so that the aluminum wire on the mounting mechanism 7 gradually wraps around the carbon steel wire after passing through the synchronous wheel 4, thus completing the stranding of the anti-corrosion strand.

[0066] An arc-shaped plate 31, coaxially arranged with the mounting roller 3, is fixed on the roller surface of the mounting roller 3. The mounting mechanism 7 includes a mounting assembly 71 and a storage assembly 72. The mounting assembly 71 has two sets, located near the two ends of the arc-shaped plate 31 respectively. The mounting assembly 71 includes an L-shaped plate 711 fixed to the top of the arc-shaped plate 31 and a side plate 712 located at the top of the horizontal section of the L-shaped plate 711. The storage assembly 72 includes a connecting plate 721 located between the two side plates 712 in the same mounting unit. There are two connecting plates 721, which are parallel to each other. The storage assembly 72 also includes a storage roller 722 rotatably mounted between the two connecting plates 721 for winding and storing aluminum wire. Two parallel inclined grooves 7 are provided through the side plate 712. 121. A connecting rod 7211 that slides with the inclined trough 7121 is fixed on the side of the connecting plate 721 away from the storage roller 722. The mounting mechanisms 7 are arranged in pairs and are mirror images of each other. Multiple pairs of mounting mechanisms 7 are evenly distributed around the mounting roller 3. Mounting blocks 8 are fixed on both the side of the connecting rod 7211 away from the axis of the mounting roller 3 and the side of the inclined trough 7121 away from the axis of the mounting roller 3. A retaining spring 81 is fixed between the two mounting blocks 8. A mounting cavity 32 is provided inside the mounting roller 3. A driving mechanism 9 is provided inside the mounting cavity 32 to drive the storage rollers 722 in the paired mounting mechanisms 7 away from each other. Under the action of the driving mechanism 9, the storage rollers 722 in the multiple pairs of mounting mechanisms 7 around the mounting roller 3 move away from the axis of the mounting roller 3 synchronously.

[0067] Depending on the type of stranded wire, the required tension when wound on the steel wire varies. According to the needs, the operator can drive the storage rollers 722 in the paired installation mechanism 7 to move away from each other through the drive mechanism 9. At the same time, the storage rollers 722 are synchronously moved away from the axis of the installation roller 3 under the action of the drive mechanism 9. This allows the relative distance between the two storage rollers 722 and the distance between them and the axis of the installation roller 3 to be adjusted. This allows the aluminum wire that passes around the other storage roller 722 from the storage roller 722 on the side closer to the fixed plate 21 to be tightened, so as to adjust the tension of the aluminum wire and thus process stranded wires with different tensions.

[0068] The drive mechanism 9 includes a transmission assembly 91 and a drive assembly 92. The number of transmission assemblies 91 is equal to the number of sets of mounting mechanisms 7 and their positions correspond one-to-one. The transmission assembly 91 includes a T-shaped rod 911 that is slidably fitted through the side wall of the mounting roller 3, a push rod 912 that is fixed to one end of the T-shaped rod 911 located in the mounting cavity 32, a push block 913 that is fixed to one end of the T-shaped rod 911 away from the axis of the mounting roller 3, and a push plate 914 that is fixed to one side of the connecting plate 721. The T-shaped rod 911 is located in the middle of the two sets of mounting mechanisms 7. There are two push blocks 913 that are mirror images of each other. The cross-section of the push block 913 and the cross-section of the push plate 914 are both right trapezoidal. The sides of the push block 913 and the push plate 914 that are close to each other are inclined surfaces and abut against each other. The drive assembly 92 acts on the push rod 912 in the multiple sets of transmission assemblies 91 and simultaneously controls the multiple sets of T-shaped rods 911 to move toward the side that is close to or away from the axis of the mounting roller 3.

[0069] The drive assembly 92 includes a sleeve 921 rotatably mounted on the inner wall of the mounting cavity 32 away from the fixed plate 21, a rotating plate 922 fixed to the end of the sleeve 921 near the fixed plate 21, an inner driven gear 923 fixedly sleeved on the sleeve 921, a drive motor 924 fixed to the inner wall of the mounting cavity 32 away from the fixed plate 21, and an inner driving gear 925 fixed to the output end of the drive motor 924 and meshing with the inner driven gear 923. The rotating plate 922 also has a central hole 6 through which a carbon steel wire passes. The rotating plate 922 has an arc-shaped hole 9221 through which the push rods 912 in the multiple sets of transmission assemblies 91 slide. The arc-shaped hole 9221 is eccentrically positioned with the central hole 6, and the end of the arc-shaped hole 9221 near the central hole 6 is positioned close to the axis of the central hole 6.

[0070] After the drive motor 924 is started, the drive motor 924 drives the inner drive gear 925 fixed to its output end to rotate, thereby causing the inner driven gear 923 meshing with the inner drive gear 925, the sleeve 921 fixed to the inner driven gear 923, and the rotating plate 922 fixed to the sleeve 921 to rotate. Since the multiple arc-shaped holes 9221 on the rotating plate 922 are respectively in sliding engagement with the push rods 912 in the multiple sets of transmission components 91, the multiple T-shaped rods 911 move synchronously toward the side closer to or away from the axis of the mounting roller 3 under the action of their respective push rods 912, so that the relative distance between the two paired storage rollers 722 can be adjusted to adjust the tension of the aluminum wire to a suitable size.

[0071] A dovetail block 7122 is fixed to the bottom of the side plate 712. A groove 7111 for sliding engagement of the dovetail block 7122 is provided at the top of the horizontal section of the L-shaped plate 711. A positioning sliding hole 7112 perpendicular to and communicating with the groove 7111, and a mounting hole 7113 fixed to and communicating with the side of the positioning sliding hole 7112 away from the groove 7111 are provided on the horizontal section of the L-shaped plate 711. A method for fixing the side plate 712 is provided on the horizontal section of the L-shaped plate 711. The positioning assembly 10 of 2 includes a positioning rod 101 that slides with the positioning slide hole 7112 and abuts against the side of the dovetail block 7122 away from the storage roller 722, a connecting column 102 fixed to the end of the positioning rod 101 away from the slide groove 7111, an end plate 103 fixed to the end of the connecting column 102 away from the slide groove 7111, and a positioning spring 104 sleeved on the connecting column 102 and fixed between the inner wall of the mounting hole 7113 and the end plate 103.

[0072] When the aluminum wire on the storage roller 722 is used up, the operator only needs to pull the end plate 103 to retract the positioning rod 101 into the positioning sliding hole 7112, so that the dovetail block 7122 can slide along the sliding groove 7111, which makes it easy to disassemble the storage roller 722 for replacement with a storage roller 722 with a new aluminum wire coil.

[0073] The power mechanism 5 includes a controller 51 fixed to the top of the base 2, an active rod 52 rotatably mounted on the fixed plate 21, a first active gear 53 fixed to the end of the active rod 52, a first power motor 54 fixed to the fixed plate 21 and fixed to one end of the active rod 52, a first driven gear 55 rotatably mounted to one end of the mounting roller 3 and meshing with the first active gear 53, a second active gear 56 rotatably mounted on the second mounting base 23, a second power motor 57 fixed to the second mounting base 23 and driving the second active gear 56 to rotate, and a second driven gear 58 fixedly sleeved on the synchronous pulley 4 and meshing with the second active gear 56. The first power motor 54, the second power motor 57 and the drive motor 924 are all electrically connected to the controller 51.

[0074] The operator can control the first power motor 54 and the second power motor 57 to run synchronously through the controller 51. In this embodiment, the first driven gear 55 and the second driven gear 58 are the same size, and the first driving gear 53 and the second driving gear 56 are the same size, so that the mounting roller 3 and the synchronous wheel 4 rotate synchronously. Under the action of the pulling mechanism, the aluminum wire released through the mounting roller 3 passes through the hole 41 on the synchronous wheel 4 and is twisted onto the carbon steel wire.

[0075] The above description is merely a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A corrosion resistant strand characterized by: The high-strength carbon steel wire (1) is tightly arranged in parallel, and an aluminum-steel penetration layer (11) is extruded on each high-strength carbon steel wire (1), and a plurality of aluminum strands (12) are uniformly and spirally wound outside the high-strength carbon steel wire (1). The aluminum-steel penetration layer (11) comprises, in percentage by weight, 0.12-0.23% of aluminum-based cerium-rich rare earth, 0.18-0.27% of aluminum-based intermediate alloy, and the balance of aluminum. The aluminum-based intermediate alloy comprises, in percentage by weight, 50% of aluminum-based niobium and 50% of MB11. The niobium content in the aluminum-based niobium is 0.009-0.0135wt%. The MB11 comprises niobium, zirconium, boron, titanium and aluminum, and the content of each element is: 0.15-0.3wt% of niobium, 0.05-0.15wt% of zirconium, 0.01-0.03wt% of boron, 0.02-0.05wt% of titanium, and the balance of aluminum.

2. An anti-corrosion strand according to claim 1, characterized in that: The thickness of the aluminum-steel penetration layer (11) is 8-10µm.

3. A process for manufacturing the corrosion resistant strand according to any one of claims 1-2, characterized by, The method comprises the following steps: S1, weighing aluminum-based cerium-rich rare earth, so that the weight percentage in the aluminum-steel penetration layer (11) is 0.12-0.23%; S2, preparing aluminum-based intermediate alloy according to the ratio of 50% of aluminum-based niobium and 50% of MB11, wherein: The niobium content in the aluminum-based niobium is 0.009-0.0135wt%, the niobium content in the MB11 is 0.15-0.3wt%, the zirconium content is 0.05-0.15wt%, the boron content is 0.01-0.03wt%, the titanium content is 0.02-0.05wt%, and the balance is aluminum; S3, selecting high-strength carbon steel wire (1), soaking in 50℃ alkaline cleaning agent for 10min, then rinsing with clean water, then soaking in 15% hydrochloric acid solution at 30℃ for 5min, and finally rinsing with clean water and drying; S4, adding the raw materials obtained in S1 and S2 into a melting furnace, melting at 730℃ for 22min, passing the steel wire obtained in S3 through an extrusion die at a speed of 3m / min, the equipment pressure is 9MPa, and the temperature is 700℃, to form an aluminum-steel penetration layer (11) with a thickness of 8-10µm; S5, sending the electrical aluminum into a multi-pass continuous wire drawing machine to draw aluminum wire at a speed of 20m / min and a tension of 40N; S6, introducing the drawn aluminum wire into a stranding machine, and stranding the aluminum wire (12) at a spiral pitch of 10-15 times the diameter of the aluminum wire (12) at a speed of 12m / min and a tension of 60N.

4. The processing technology for an anti-corrosion stranded wire according to claim 3, characterized in that, The twisting machine comprises a base (2), the top of the base (2) is sequentially fixed with a fixed plate (21), a first mounting seat (22), a second mounting seat (23) and a third mounting seat (24) which are parallel to each other, the first mounting seat (22) is provided with two, the two first mounting seats (22) are rotatably installed with a mounting roller (3), the second mounting seat (23) is rotatably installed with a synchronous wheel (4), the base (2), the fixed plate (21) and the second mounting seat (23) are jointly installed with a power mechanism (5) for driving the mounting roller (3) and the synchronous wheel (4) to rotate synchronously, the center of the mounting roller (3) and the synchronous wheel (4) is provided with a center hole (6) for passing through the carbon steel wire, the roller surface of the mounting roller (3) is uniformly provided with a plurality of mounting mechanisms (7) for mounting the aluminum wire, the synchronous wheel (4) is provided with a plurality of through holes (41) which are uniformly distributed about the axis of the synchronous wheel (4) and are used for passing through the aluminum wire, the third mounting seat (24) is provided with a through hole (241) for passing through the twisted carbon steel wire and the aluminum wire, and the top of the base (2) is further provided with a pulling mechanism for pulling the twisted carbon steel wire and the aluminum wire forward.

5. The process of claim 3, wherein the process is characterized by: The roller surface of the mounting roller (3) is fixed with a circular arc plate body (31) which is coaxially arranged, the mounting mechanism (7) comprises a mounting assembly (71) and a storage assembly (72), the mounting assembly (71) is provided with two groups and is located at the positions close to the two ends of the circular arc plate body (31), the mounting assembly (71) comprises an L-shaped plate body (711) fixed to the top of the circular arc plate body (31) and a side plate body (712) arranged on the top of the horizontal section of the L-shaped plate body (711), the storage assembly (72) comprises a connecting plate (721) arranged between the two side plate bodies (712) in the same mounting unit, the connecting plate (721) is provided with two and is parallel to each other, the storage assembly (72) further comprises a storage roller (722) rotatably installed between the two connecting plates (721) and used for winding and storing the aluminum wire, the side plate body (712) is provided with two parallel inclined grooves (7121) penetrating through, the side of the connecting plate (721) away from the storage roller (722) is fixed with a connecting rod (7211) which is in sliding fit with the inclined groove (7121), the mounting mechanism (7) is arranged in pairs and is mirror image to each other, a plurality of pairs of mounting mechanisms (7) are uniformly distributed on the periphery of the mounting roller (3), the side of the connecting rod (7211) away from the axis of the mounting roller (3) and the side of the inclined groove (7121) away from the axis of the mounting roller (3) are both fixed with a mounting block (8), and the two mounting blocks (8) are fixed with a pressing spring (81) therebetween; The mounting roller (3) is provided with a mounting cavity (32), the mounting cavity (32) is provided with a driving mechanism (9) for driving the storage rollers (722) in the mounting mechanisms (7) arranged in pairs to move away from each other, and the storage rollers (722) in the plurality of pairs of mounting mechanisms (7) on the periphery of the mounting roller (3) move away from the axis of the mounting roller (3) synchronously under the action of the driving mechanism (9).

6. A process for the manufacture of a corrosion resistant strand as claimed in claim 5, characterized in that: The driving mechanism (9) comprises a transmission assembly (91) and a driving assembly (92), the number of the transmission assemblies (91) is equal to the number of the pairs of the mounting mechanisms (7) and the positions are one-to-one corresponding, the transmission assembly (91) comprises a T-shaped rod body (911) penetratingly arranged in the side wall of the mounting roller (3) and slidingly matched, a push rod (912) fixed at one end of the T-shaped rod body (911) in the mounting cavity (32), a push block (913) fixed at the other end of the T-shaped rod body (911) away from the axis of the mounting roller (3), and a push plate (914) fixed at one side of the connecting plate (721), the T-shaped rod body (911) is located in the middle of the two pairs of the mounting mechanisms (7), the push block (913) is provided with two and mirror images, the cross section of the push block (913) and the cross section of the push plate (914) are both right trapezoidal, the side of the push block (913) and the push plate (914) close to each other is an inclined surface and abuts against each other, and the driving assembly (92) acts on the push rod (912) in the plurality of the transmission assemblies (91) and simultaneously controls the movement of the plurality of the T-shaped rod bodies (911) towards the side close to or away from the axis of the mounting roller (3).

7. A process for the manufacture of a corrosion resistant strand as claimed in claim 6, characterized in that: The driving assembly (92) comprises a sleeve (921) rotatingly mounted on the inner wall of the mounting cavity (32) away from the fixed plate (21), a rotating plate (922) fixed at one end of the sleeve (921) close to the fixed plate (21), an inner driven gear (923) fixedly sleeved on the sleeve (921), a driving motor (924) fixed on the inner wall of the mounting cavity (32) away from the fixed plate (21), and an inner driving gear (925) fixed on the output end of the driving motor (924) and meshed with the inner driven gear (923), the rotating plate (922) is also provided with a central hole (6) penetratingly arranged for the carbon steel wire to pass through, the rotating plate (922) is provided with a circular arc hole body (9221) penetratingly arranged for the push rod (912) in the plurality of the transmission assemblies (91) to slidingly match, the circular arc hole body (9221) is eccentrically arranged with the central hole (6), and one end of the circular arc hole body (9221) close to the central hole (6) is arranged near the axis of the central hole (6).

8. A process for the manufacture of a corrosion resistant strand as claimed in claim 7, characterized in that: The bottom of the side plate body (712) is fixed with a dovetail block (7122), the top of the horizontal section of the L-shaped plate body (711) is provided with a sliding groove (7111) for the dovetail block (7122) to slidingly match, the side wall of the horizontal section of the L-shaped plate body (711) is provided with a positioning sliding hole (7112) penetratingly arranged and perpendicular to the sliding groove (7111) and in communication, and the mounting hole (7113) is fixed and in communication with the positioning sliding hole (7112) on the side away from the sliding groove (7111); The horizontal section of the L-shaped plate body (711) is provided with a positioning assembly (10) for fixing the side plate body (712), the positioning assembly (10) comprises a positioning rod (101) which is in sliding fit with the positioning sliding hole (7112) and abuts against the dovetail block (7122) away from the storage roller (722), a connecting column (102) which is fixed with the positioning rod (101) away from the sliding groove (7111), an end plate (103) which is fixed with the connecting column (102) away from the sliding groove (7111), and a positioning spring (104) which is sleeved on the connecting column (102) and is fixed between the inner wall of the mounting hole (7113) and the end plate (103).

9. The process of claim 7, wherein the process is characterized by: The power mechanism (5) comprises a controller (51) fixed on the top of the base (2), a driving rod (52) rotatably installed on the fixed plate (21), a first driving gear (53) fixed on the end of the driving rod (52), a first power motor (54) fixed on the fixed plate (21) and fixed with one end of the driving rod (52), a first driven gear (55) rotatably installed on one end of the mounting roller (3) and engaged with the first driving gear (53), a second driving gear (56) rotatably installed on the second mounting seat (23), a second power motor (57) fixed on the second mounting seat (23) and driving the second driving gear (56) to rotate, and a second driven gear (58) fixedly sleeved on the synchronous wheel (4) and engaged with the second driving gear (56), the first power motor (54), the second power motor (57) and the driving motor (924) are electrically connected with the controller (51).

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