Corrosion-resistant power transmission line cable and preparation method thereof

Abstract

The invention relates to the technical field of power transmission line cables, and particularly discloses a corrosion-resistant power transmission line cable and a preparation method thereof.The corrosion-resistant power transmission line cable comprises a copper core, an armor layer is fixedly connected to the side face of the copper core, a filling layer is arranged between the copper core and the armor layer, and an outer layer component is fixedly connected to the side face of the armor layer; the side surface of the outer layer component is fixedly connected with a supporting component, and the inner side of the outer sheath is uniformly provided with ferrules. According to the corrosion-resistant power transmission line cable and the preparation method thereof, the cable is lifted away from the cushion layer ground, a continuous and uniform suspended ventilation gap is formed, direct contact between the cable outer sheath and soil, accumulated water and a saline-alkali medium is physically isolated, a contact path of a corrosive medium is cut off from the source, active corrosion-proof protection of the cable is achieved, the operation is simple, and the cost is low. No special tool is needed, batch installation can be rapidly completed on site, the construction efficiency of cable laying is improved, and the device is suitable for various on-site construction environments such as the field and cable trenches.

Description

A corrosion-resistant power transmission line cable and its preparation method Technical Field

[0001] This invention relates to the field of power transmission line cable technology, specifically to a corrosion-resistant power transmission line cable and its preparation method. Background Technology

[0002] Transmission line cables are core infrastructure in modern power systems used for transmitting and distributing high-power electrical energy. They are specialized power cables, distinct from overhead bare conductors, primarily suited for concealed installations such as underground, tunnels, and underwater installations. Like the "blood vessels" of the power system, they bear the core function of safely, stably, and efficiently transmitting electrical energy. Compared to overhead transmission lines, transmission line cables have significant advantages, including less land occupation, less susceptibility to weather conditions and external interference, higher power supply reliability, better concealment, and less impact on urban space and landscape. They can also adapt to the needs of various special power transmission scenarios, such as cross-sea and cross-river projects, urban core areas, industrial and mining areas, and new energy grid connection. They are widely used in urban underground power grid renovation, power extraction from large hub substations, cross-sea and cross-river power transmission projects, and rail transit power supply, making them indispensable key equipment for supporting modern power grid construction and ensuring a stable power supply for social production and daily life.

[0003] Chinese patent CN219872933U discloses a wire and cable with an anti-corrosion structure, including a wire body and a protective cylinder sleeved on the outer wall of the wire body. The wire body consists of: a heat-dissipating adhesive layer, an insulating rubber sheet, a copper core, a wrapping layer, a flame-retardant layer, an anti-corrosion layer, a buffer rubber cylinder, a buffer layer, and a filling layer. By covering the outer wall of the wire body with the protective cylinder, damage to the wire body from external objects is effectively prevented. Reinforcing ribs enhance the overall toughness of the wire body, effectively preventing breakage when subjected to external deformation forces, thus improving the wire body's resistance. In this technical solution, by covering the outer wall of the wire body with the protective cylinder... The outer wall of the cable body effectively prevents external objects from damaging the cable body, improving the resistance of the cable body and preventing water from entering through the break, thus improving the corrosion resistance of the cable body. However, when installing and laying cables in saline-alkali environments, the cables are in direct contact with the saline-alkali soil. The saline-alkali media in the soil can easily corrode the outer surface of the cable, causing the cable to corrode and age, affecting the service life of the cable. At the same time, although brackets are used to support and isolate the cables in actual work, rainwater can easily adhere to and remain on the cable surface for a long time during rainy days, and cannot be quickly drained, further aggravating the cable's moisture corrosion. It is difficult to meet the long-term corrosion protection requirements of cables in saline-alkali environments. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a corrosion-resistant transmission line cable and its manufacturing method, comprising a copper core, an armor layer fixedly connected to the side of the copper core, a filler layer disposed between the copper core and the armor layer, an outer layer component fixedly connected to the side of the armor layer, and a support component fixedly connected to the side of the outer layer component; the outer layer component includes an outer sheath, with ferrules evenly distributed on the inner side of the outer sheath, buffer grooves evenly formed on the side of the ferrules, the side of the ferrules fixedly connected to the inner side of the outer sheath, and the inner side of the ferrules fixedly connected to the side of the armor layer. A connecting member is fixedly connected between two adjacent collars, and buffer grooves are evenly distributed on the side of the connecting member; further, the supporting component includes a supporting shell, the inner side of which is fixedly connected to the side of the outer sheath, and mounting grooves are evenly distributed on the side of the supporting shell. A mounting shaft is threadedly connected to the inner side of the mounting groove, and a supporting frame is fixedly connected to the side of the mounting shaft. The supporting frame can rotate through the mounting shaft and be stored in the mounting groove. An adjustment mechanism is connected to the side of the supporting frame away from the mounting shaft via a snap-fit. A through hole is provided on the inner side of the mounting groove, located below the supporting shell. Water guiding mechanisms are provided on the inner sides of both through holes; further, the adjusting mechanism includes an adjusting frame, the side of the adjusting frame away from the clearance groove is connected to the side of the support frame away from the mounting shaft by a snap fastener, clearance grooves are provided on both sides of the adjusting frame, an adjusting shaft is threadedly connected to the inner side of the adjusting frame, a limit frame is fixedly connected to one end of the adjusting shaft, and both sides of the limit frame are slidably connected to the inner side of the adjusting frame; further, the water guiding mechanism includes a water guiding pipe, the side of the water guiding pipe is slidably connected to the inner side of the through hole, and a mesh plate one and a mesh plate two are fixedly connected to the upper and lower sides of the water guiding pipe, respectively. A guide vane is rotatably connected between mesh plate one and mesh plate two. A connecting shaft is fixedly connected to the side of the guide vane near mesh plate two. Scrapers are fixedly connected to both sides of the connecting shaft. The side of the scraper away from the connecting shaft contacts the side of mesh plate two near the guide vane. A connecting plate is fixedly connected to the end of the water guide pipe away from the through hole. A sliding shaft is fixedly connected to both sides of the connecting plate. The end of the sliding shaft away from the connecting plate is slidably connected to the inner side of the support frame. A connecting spring is sleeved on the sliding shaft. One end of the connecting spring is fixedly connected to the connecting plate, and the other end of the connecting spring is fixedly connected to the support frame.

[0005] This invention provides a corrosion-resistant power transmission line cable and its preparation method. It has the following advantages: 1. This corrosion-resistant power transmission line cable and its preparation method lift the cable off the ground, forming a continuous and uniform suspended ventilation gap. This physically isolates the cable's outer sheath from direct contact with soil, water, and saline-alkali media, cutting off the contact path of corrosive media at the source. This achieves active corrosion protection for the cable. The deployment is simple, requires no special tools, and allows for rapid batch installation on-site, improving the efficiency of cable laying and adapting to various on-site construction environments such as the field and cable trenches.

[0006] 2. The corrosion-resistant transmission line cable and its manufacturing method feature a figure-eight symmetrical support structure that distributes stress evenly, preventing the cable from tipping over or sagging in certain areas. This ensures a consistent cable elevation throughout the entire cable length. Through physical suspension and isolation, it avoids long-term direct contact between the cable sheath and damp soil, accumulated water, and corrosive media, upgrading from passive corrosion protection to active corrosion isolation and significantly delaying the aging of the outer sheath.

[0007] 3. The corrosion-resistant transmission line cable and its preparation method can flexibly adjust the cable lifting height and control the suspended isolation gap according to different laying scenarios such as hardened ground, soft soil, low-lying areas, and saline-alkali land. This not only ensures the core effect of active corrosion isolation, but also solves the problem that traditional fixed-height support feet cannot adapt to complex terrain and differentiated corrosion protection needs.

[0008] 4. The corrosion-resistant transmission line cable and its preparation method have a ring structure supporting the outer shell that reduces the contact area with the cable outer sheath. The ring-shaped guide groove realizes the directional convergence and full collection of rainwater and condensate. Combined with the swirling flow of the water guide pipe to accelerate drainage, it solves the problem of water accumulation and sludge at the bottom of the cable and soaking of the sheath. It actively controls water and prevents corrosion, and slows down the corrosion and aging rate of the outer sheath.

[0009] 5. The corrosion-resistant power transmission line cable and its preparation method, with mesh plate one and mesh plate two, prevents mud and sand impurities from entering the pipe. At the same time, the water flow itself drives the scraper to achieve online automatic cleaning of mesh plate two, without manual disassembly and maintenance or additional power, avoiding drainage failure caused by blockage of the water pipe. Attached Figure Description

[0010] Figure 1 is a schematic diagram of the corrosion-resistant power transmission line cable of the present invention; Figure 2 is an axonometric view of the present invention; Figure 3 is a schematic diagram of the copper core of the present invention; Figure 4 is a schematic diagram of the outer layer component of the present invention; Figure 5 is a schematic diagram of the support component of the present invention; Figure 6 is a schematic diagram of the adjustment mechanism of the present invention; Figure 7 is a schematic diagram of the water guiding mechanism of the present invention; Figure 8 is a schematic diagram of the structure at point A in Figure 7 of the present invention.

[0011] In the diagram: 1. Outer component; 11. Outer sleeve; 12. Ring; 13. Buffer groove one; 14. Connector; 15. Buffer groove two; 2. Support component; 21. Support shell; 22. Mounting groove; 23. Support frame; 24. Mounting shaft; 25. Adjustment mechanism; 251. Adjustment frame; 252. Clearance groove; 253. Adjustment shaft; 254. Limiting frame; 27. Through hole; 28. Water guiding mechanism; 281. Water guiding pipe; 282. Mesh plate one; 283. Connecting plate; 284. Mesh plate two; 285. Guide vane; 286. Sliding shaft; 287. Connecting spring; 288. Connecting shaft; 289. Scraper; 3. Armor layer; 4. Copper core; 5. Filling layer. Detailed Implementation

[0012] Please refer to Figures 1-3. This invention provides a corrosion-resistant power transmission line cable, including a copper core 4, an armor layer 3 fixedly connected to the side of the copper core 4, a filler layer 5 disposed between the copper core 4 and the armor layer 3, an outer layer component 1 fixedly connected to the side of the armor layer 3, and a support component 2 fixedly connected to the side of the outer layer component 1. In embodiment one, please refer to Figure 4. This invention also includes the outer layer component 1. After the cable is laid in place, a buffer protection is added between the outermost outer sheath 11 and the inner armor layer 3. Loops 12 are evenly arranged on the inner side of the outer sheath 11, and buffer grooves 13 are evenly formed on the side of the loops 12. A connector 14 is fixedly connected between two adjacent loops 12, and buffer grooves 15 are evenly formed on the side of the connector 14. The buffer loops 1... The sidewall of component 2 is uniformly provided with several buffer grooves 13, and the sidewall of connector 14 is uniformly provided with several buffer grooves 15. When the outer sheath 11 is subjected to external compression, the compression force is transmitted through the outer sheath 11 to the buffer ring 12. After being compressed, the buffer ring 12 between the outer sheath 11 and the armor layer dissipates the radial compression force through the deformation and contraction of the buffer grooves 13, avoiding direct rigid compression between the outer sheath 11 and the armor layer, and preventing the outer sheath 11 from wearing out or failing due to excessive contact stress. At the same time, the stress between adjacent buffer rings 12 can be synchronously transmitted to connector 14, and the radial and axial compression stress is further absorbed through the deformation of the buffer grooves 15 on connector 14, forming a multi-level buffer protection and improving the protection of the outer sheath 11. Resistance to compression and breakage; Example 2, please refer to Figure 5, the invention also includes a support component 2, for laying scenarios in ordinary weakly corrosive soil and hardened ground of cable trenches, a set of foldable support anti-slip feet is symmetrically arranged at equal intervals of 2m along the cable axis; when the cable is laid in place, the cable is first laid straight on the fine sand pad at the bottom of the cable trench, and then the support mechanism is unfolded: the side of the support shell 21 is evenly provided with mounting grooves 22, the inner side of the mounting groove 22 is threaded with a mounting shaft 24, and the side of the mounting shaft 24 is fixedly connected with a support frame 23. By rotating the mounting shafts 24 on both sides of the bottom of the support shell 21, the support frame 23 is driven to rotate along the inner side of the mounting groove 22, so that the support frame 23 is disengaged from the mounting groove 22 in the storage state. After the symmetrical support frames 23 on the left and right sides are simultaneously unfolded, they form a stable V-shaped support structure, which completes the positioning support of the cable. At the same time, the water guiding mechanism 28 can guide the water on the cable in rainy weather. In the third embodiment, please refer to Figure 6. The present invention also includes an adjustment mechanism 25. Rotating the mounting shafts 24 on both sides of the bottom of the support housing 21 drives the support frame 23 to rotate out of the storage mounting groove 22, completing the initial unfolding. The inner side of the adjustment frame 251 is threaded with an adjustment shaft 253. One end of the adjustment shaft 253 is fixedly connected to a limit frame 254. The side of the adjustment frame 251 away from the clearance groove 252 is connected to the side of the support frame 23 away from the mounting shaft 24 through a buckle. Both sides of the limit frame 254 are slidably connected to the inner side of the adjustment frame 251.According to the preset lifting height of the cable, the adjusting frame 251 is pulled and slid along the guide of the support frame 23 for adjustment; after adjustment, the limit buckle between the adjusting frame 251 and the support frame 23 automatically engages and locks, accompanied by a click sound, completing the locking and fixing of the height position; after locking, the mechanism cannot retract in the reverse direction, ensuring the long-term stability of the support height and support state. After the symmetrical support frames 23 on the left and right sides are adjusted synchronously, they form a figure-eight stable support structure, raising the cable to the target suspension height; after the height is locked, the adjusting shaft 253 on the adjusting frame 251 is rotated, and the adjusting shaft 253 slides along the inner side of the adjusting frame 251 through threaded transmission, thereby driving the limit frame 254 connected to the adjusting shaft 253 to slide along the guide grooves on both sides of the adjusting frame 251, so that the limit frame 254... The anchoring end of 4 is inserted into the soil and cushion layer of the support surface to form an anchoring limit; through the fitting and fixing of the limiting frame 254 with the soil, the adjusting frame 251 and the support frame 23 are integrally limited and locked, completely preventing the support mechanism from slipping or shifting. In embodiment four, please refer to Figures 7-8. The present invention also includes a water guiding mechanism 28. The side of the water guiding pipe 281 is slidably connected to the inner side of the through hole 27. Both sides of the connecting plate 283 are fixedly connected to sliding shafts 286. A connecting spring 287 is sleeved on the sliding shaft 286. The end of the sliding shaft 286 away from the connecting plate 283 is slidably connected to the inner side of the support frame 23. One end of the connecting spring 287 is fixedly connected to the connecting plate 283, and the other end of the connecting spring 287 is fixedly connected to the support frame 23. When rotated and installed... When shaft 24 drives two sets of support frames 23 to rotate out of the mounting groove 22 and form a figure-eight shape to provide stable support for the cable, the rotation of the support frame 23 synchronously triggers the water guiding mechanism 28. The connecting springs 287, which are sleeved on the sliding shafts 286 on both sides of the bottom connecting plate 283, release elastic tension as the support frame 23 unfolds, pulling the water guiding pipe 281 to slide out along the inside of the through hole 27 of the support shell 21, so that the water guiding pipe 281 enters the preset drainage working position and forms a flow guide with the water collection structure at the bottom of the cable. The inner side of the support shell 21 adopts an annular fitting structure, and the inner wall is provided with a continuous annular flow guiding groove. This reduces the contact area between the support shell 21 and the cable outer sheath 11, reduces contact stress, avoids wear of the sheath caused by long-term contact of the support structure, and ensures the integrity of the anti-corrosion layer. In terms of integrity, during rainy weather or in high humidity environments, rainwater and condensation on the cable surface can flow in a direction along the annular guide groove inside the supporting shell 21 and be guided into the through hole 27 to collect accumulated water. The upper and lower sides of the water guide pipe 281 are respectively fixedly connected to the mesh plate 1 282 and the mesh plate 284. The guide vane 285 is rotatably connected between the mesh plate 1 282 and the mesh plate 284. After the collected water is coarsely filtered by the mesh plate 1 282 at the top of the water guide pipe 281, it enters the pipe. The downward spiral guide vane 285, which is coaxially set along the inner wall of the water guide pipe 281, forms a vortex and accelerates the downward flow. Finally, it is directionally discharged from the bottom of the water guide pipe 281 to the ground outside the cable, avoiding the accumulation of water in the gap at the bottom of the cable and the corrosion and aging problems caused by long-term immersion of the outer sheath 11.A connecting shaft 288 is fixedly connected to the side of the guide vane 285 near the second mesh plate 284. Scrapers 289 are fixedly connected to both sides of the connecting shaft 288. When the rainfall intensity is high and the water flow rate entering the water pipe 281 is high, the high-speed water flow will drive the spiral guide vane 285 to rotate between the first mesh plate 282 and the second mesh plate 284. The spiral guide vane 285, through the connecting shaft 288 at the bottom, synchronously drives the scrapers 289 on both sides to rotate in a circular motion, causing the scrapers 289 to continuously contact and scrape the top surface of the second mesh plate 284 at the bottom of the water pipe 281, achieving online automatic cleaning of impurities attached to the second mesh plate 284. Simultaneously, the bottom of the water pipe 281 is equipped with… The mesh plate 284 prevents external sewage, sludge, and sediment from entering the pipe. In extreme conditions such as rising ground water, rainwater backflow, and water accumulation in backfill soil, when external water attempts to flow back upward from the outlet of the water guide pipe 281, the continuous spiral structure of the spiral guide vanes 285 inside the pipe forms a barrier, blocking the direct backflow channel and preventing external water from flowing back to the bottom of the cable. This keeps the gap at the bottom of the cable dry and ensures long-term stability of the corrosion protection effect. Example 5: A method for preparing a corrosion-resistant transmission line cable, including the following steps: S1: Copper core 4 corrosion protection preparation, selecting electrical copper and aluminum conductor single wires, after degreasing, pickling, and passivation pretreatment. S1: Preparation of anti-corrosion coating; pre-treated single wires are layered and tightly stranded, and water-blocking and anti-corrosion composite paste is filled into the single wires and interlayer gaps during the stranding process. The outer layer of the stranded wires is wrapped with semi-conductive anti-corrosion and water-blocking tape to obtain an anti-corrosion copper core 4 with a compaction coefficient ≥93%; S2: Preparation of insulation system, using a three-layer co-extrusion process, a conductor shielding layer, a modified corrosion-resistant cross-linked polyethylene insulation layer, and an insulation shielding layer are extruded sequentially on the outside of the anti-corrosion copper core 4 to form a complete insulation system; the insulation layer substrate is compounded with antioxidants, metal ion passivators, and hydrolysis-resistant additives, and cross-linking is completed after extrusion, with a cross-linking degree ≥80%; S3: Preparation of cabling and filling layer 5, for multi-core transmission cables, the cable is formed by adding a semi-conductive anti-corrosion and water-blocking tape to the outer layer of the copper core 4. The multiple insulated cores of the insulation system are stranded together with anti-corrosion filler rope to form a cable. The gaps between the cores are completely filled to form an anti-corrosion filler layer 5. After the cable is formed, it is wrapped with a composite anti-corrosion and water-blocking tape to form a fully enclosed buffer water-blocking and anti-corrosion layer; S4: Inner liner extrusion. A 0.8-1.5mm thick high-density polyethylene inner liner is extruded outside the buffer water-blocking and anti-corrosion layer to form a continuous protective barrier; S5: Armor layer 3 anti-corrosion preparation. For cables with direct burial and high mechanical protection requirements, the armor substrate is first pretreated with nano-epoxy anti-corrosion primer, and then the armor layer is formed. The gaps of the armor layer 3 are simultaneously filled with anti-corrosion lubricating grease to form an armor layer 3 that has both mechanical protection and anti-corrosion capabilities.S6: Outer sheath 11 extrusion: A high-weather-resistant and corrosion-resistant outer sheath 11, compounded with anti-UV, anti-oxidation, and corrosion-resistant additives, is extruded outside the armor layer 3. The sheath eccentricity is controlled to ≤8%, forming the core radial anti-corrosion barrier of the cable. In highly corrosive environments, an 80-200μm heavy-duty anti-corrosion coating is added to the outer sheath 11. The finished cable undergoes electron beam irradiation cross-linking modification, with the irradiation dose controlled at 120-200kGy. After completing electrical, mechanical, and corrosion-resistant tests on the finished cable, anti-corrosion sealing treatment is applied to both ends of the cable. Specific workflow: After the cable is laid in place, a buffer protection is added between the outermost outer sheath 11 and the inner armor layer 3. Loops 12 are evenly arranged on the inner side of the outer sheath 11. The side of the ring 12 is uniformly provided with buffer grooves 13. A connector 14 is fixedly connected between two adjacent rings 12. The side of the connector 14 is uniformly provided with buffer grooves 15. The side wall of the buffer ring 12 is uniformly provided with several buffer grooves 13, and the side wall of the connector 14 is uniformly provided with several buffer grooves 15. When the outer sheath 11 is subjected to external compression, the compression force is transmitted to the buffer ring 12 through the outer sheath 11. After being compressed, the buffer ring 12 between the outer sheath 11 and the armor layer dissipates the radial compression force through the deformation and contraction of the buffer grooves 13, avoiding direct rigid compression between the outer sheath 11 and the armor layer, and avoiding the problem of the outer sheath 11 wearing out or failing due to excessive contact stress. At the same time, the adjacent buffer grooves 13 are uniformly provided with buffer grooves 13. The stress between the punch rings 12 can be synchronously transferred to the connector 14. The radial and axial compressive stress is further absorbed by the deformation of the buffer groove 15 on the connector 14, forming a multi-level buffer protection and improving the compressive and damage resistance of the outer sheath 11. For laying scenarios in ordinary weakly corrosive soil and hardened ground of cable trench, a set of foldable support anti-slip feet is symmetrically set at equal intervals of 2m along the cable axis. When laying the cable, first place the cable straight on the fine sand pad at the bottom of the cable trench, and then perform the support mechanism deployment operation: rotate the mounting shafts 24 on both sides of the bottom of the support shell 21, and drive the support frame 23 to rotate along the inner side of the mounting groove 22 through the mounting shafts 24, so that the support frame 23 is disengaged from the mounting groove 22 in the storage state, and the left and right sides are opened. After the symmetrical support frames 23 are simultaneously deployed, they form a figure-eight stable support structure, completing the positioning and support of the cable. Rotating the mounting shafts 24 on both sides of the bottom of the support housing 21 drives the support frame 23 to rotate out of the storage mounting slot 22, completing the initial deployment. According to the preset lifting height of the cable, the adjusting frame 251 is pulled to slide along the guide of the support frame 23 for adjustment. After the adjustment is in place, the limit buckle between the adjusting frame 251 and the support frame 23 automatically engages and locks, accompanied by a click sound, completing the locking and fixing of the height level. After locking, the mechanism cannot retract in the opposite direction, ensuring the long-term stability of the support height and support state. After the symmetrical support frames 23 on the left and right sides are simultaneously adjusted, they form a figure-eight stable support structure, lifting the cable to the target suspension height.After the height is locked, the adjusting shaft 253 on the adjusting frame 251 is rotated, and the adjusting shaft 253 slides along the inner side of the adjusting frame 251 through threaded transmission. This drives the limiting frame 254 connected to the adjusting shaft 253 to slide along the guide grooves on both sides of the adjusting frame 251, so that the anchoring end of the limiting frame 254 is inserted into the soil and cushion layer of the support surface, forming an anchoring limit. Through the fitting and fixing of the limiting frame 254 with the soil, the adjusting frame 251 and the support frame 23 are integrally limited and locked, completely preventing the support mechanism from slipping or shifting. When the rotating mounting shaft 24 drives the two sets of support frames 23 to rotate out of the mounting groove 22 and form a figure-eight shape to provide stable support for the cable, the rotation of the support frame 23 synchronously triggers the guide. The water mechanism 28, with connecting springs 287 sleeved on the sliding shafts 286 on both sides of the bottom connecting plate 283, releases elastic tension as the support frame 23 unfolds, pulling the water guide pipe 281 to slide out along the inner side of the through hole 27 of the support shell 21, so that the water guide pipe 281 enters the preset drainage working position and forms a guide with the water collection structure at the bottom of the cable; the inner side of the support shell 21 adopts an annular fitting structure, and the inner wall is provided with a continuous annular guide groove; reducing the contact area between the support shell 21 and the cable outer sheath 11, reducing contact stress, avoiding sheath wear caused by long-term contact of the support structure, and ensuring the integrity of the anti-corrosion layer; in rainy weather or high humidity environment, rainwater and condensation on the cable surface can flow along the support shell 21 The inner annular guide channel directs the flow of water into the through hole 27 for collection. After coarse filtration by the mesh plate 282 at the top of the water pipe 281, the collected water enters the pipe. The downward spiral guide vanes 285, coaxially arranged along the inner wall of the water pipe 281, create a swirling flow, accelerating the downward flow. Finally, the water is discharged directionally from the bottom of the water pipe 281 to the ground outside the cable, preventing water from accumulating in the gaps at the bottom of the cable and causing corrosion and aging of the outer sheath 11 due to long-term immersion. When rainfall is heavy and the water flow rate into the water pipe 281 is high, the high-speed water flow drives the spiral guide vanes 285 to rotate between the mesh plate 282 and the mesh plate 284. The spiral guide vanes 285 are connected at the bottom... Shaft 288 synchronously drives the scrapers 289 on both sides to rotate in a circular motion, so that the scrapers 289 continuously contact and scrape the top surface of the mesh plate 284 at the bottom of the water guide pipe 281, realizing online automatic cleaning of impurities attached to the mesh plate 284; at the same time, the mesh plate 284 at the bottom of the water guide pipe 281 prevents external sewage, sludge, and sediment from entering the pipe; in extreme working conditions such as rising ground water, rainwater backflow, and water accumulation in backfill soil, when external water attempts to flow back upward from the outlet of the water guide pipe 281, the continuous spiral structure of the spiral guide vanes 285 inside the pipe forms a barrier, blocking the straight-through backflow channel, preventing external water from flowing back to the bottom of the cable, keeping the gap at the bottom of the cable dry, and ensuring long-term stable corrosion protection effect.

[0013] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A corrosion-resistant power transmission line cable, characterized in that, The system includes a copper core (4), an armor layer (3) fixedly connected to the side of the copper core (4), a filling layer (5) between the copper core (4) and the armor layer (3), an outer component (1) fixedly connected to the side of the armor layer (3), and a support component (2) fixedly connected to the side of the outer component (1): the outer component (1) includes an outer sheath (11), a collar (12) is uniformly arranged on the inner side of the outer sheath (11), a buffer groove (13) is uniformly opened on the side of the collar (12), the side of the collar (12) is fixedly connected to the inner side of the outer sheath (11), the inner side of the collar (12) is fixedly connected to the side of the armor layer (3), a connector (14) is fixedly connected between two adjacent collars (12), and a buffer groove (15) is uniformly opened on the side of the connector (14).

2. The corrosion-resistant power transmission line cable according to claim 1, characterized in that: The support component (2) includes a support shell (21). The support shell (21) has mounting grooves (22) evenly distributed on its side. The mounting groove (22) is threaded with a mounting shaft (24). The mounting shaft (24) is fixedly connected to a support frame (23) on its side. The side of the support frame (23) away from the mounting shaft (24) is connected to an adjustment mechanism (25) by a snap fastener. The mounting groove (22) has through holes (27) on its inner side. Water guiding mechanisms (28) are provided on the inner sides of the through holes (27) on both sides below the support shell (21).

3. The corrosion-resistant power transmission line cable according to claim 2, characterized in that: The inner side of the support shell (21) is fixedly connected to the side of the outer sheath (11), and the support frame (23) can be rotated through the mounting shaft (24) and stored in the mounting slot (22).

4. The corrosion-resistant power transmission line cable according to claim 2, characterized in that: The adjustment mechanism (25) includes an adjustment frame (251), with clearance grooves (252) on both sides of the adjustment frame (251). An adjustment shaft (253) is threadedly connected to the inner side of the adjustment frame (251), and a limit frame (254) is fixedly connected to one end of the adjustment shaft (253).

5. The corrosion-resistant power transmission line cable according to claim 4, characterized in that: The side of the adjusting frame (251) away from the relief groove (252) is connected to the side of the support frame (23) away from the mounting shaft (24) by a buckle, and both sides of the limiting frame (254) are slidably connected to the inner side of the adjusting frame (251).

6. The corrosion-resistant power transmission line cable according to claim 2, characterized in that: The water guiding mechanism (28) includes a water guiding pipe (281). The side of the water guiding pipe (281) is slidably connected to the inside of the through hole (27). The upper and lower sides of the water guiding pipe (281) are respectively fixedly connected to a mesh plate one (282) and a mesh plate two (284). A guide vane (285) is rotatably connected between the mesh plate one (282) and the mesh plate two (284). A connecting shaft (288) is fixedly connected to the side of the guide vane (285) close to the mesh plate two (284). Scrapers (289) are fixedly connected to both sides of the connecting shaft (288). A connecting plate (283) is fixedly connected to the end of the water guiding pipe (281) away from the through hole (27). A sliding shaft (286) is fixedly connected to both sides of the connecting plate (283). A connecting spring (287) is sleeved on the sliding shaft (286).

7. A corrosion-resistant power transmission line cable according to claim 6, characterized in that: The scraper (289) is in contact with the side of the mesh plate (284) away from the connecting shaft (288) and the side of the mesh plate (284) near the guide vane (285). The sliding shaft (286) is slidably connected to the inner side of the support frame (23) at one end away from the connecting plate (283). One end of the connecting spring (287) is fixedly connected to the connecting plate (283), and the other end of the connecting spring (287) is fixedly connected to the support frame (23).

8. A method for preparing a corrosion-resistant transmission line cable, as described in claim 7, characterized in that, Includes the following steps: S1: Copper core (4) anti-corrosion preparation: Select electrical copper and aluminum conductor single wires, and after degreasing, pickling and passivation pretreatment, prepare anti-corrosion coating; the pretreated single wires are layered and tightly twisted, and water-blocking anti-corrosion composite paste is filled in the single wires and interlayer gaps during the twisting process. The outer layer of the twisted wires is wrapped with semi-conductive anti-corrosion water-blocking tape to obtain an anti-corrosion copper core (4) with a compaction coefficient ≥93%; S2: Insulation system preparation: Using a three-layer co-extrusion process, a conductor shielding layer, a modified corrosion-resistant cross-linked polyethylene insulation layer, and an insulation shielding layer are extruded sequentially on the outside of the anti-corrosion copper core (4) to form a complete insulation system; the insulation layer substrate is compounded with antioxidants, metal ion passivators, and hydrolysis-resistant additives, and cross-linking is completed after extrusion, with a cross-linking degree ≥80%; S3: Cable formation and filling layer (5) preparation: For multi-core power transmission cables, multiple insulated cores with insulation system are combined with anti-corrosion filling rope to form a cable. Stranding, the gaps between the wire cores are completely filled to form an anti-corrosion filling layer (5). After the cable is made, the composite anti-corrosion and water-blocking tape is wrapped around the whole to form a fully wrapped buffer water-blocking and anti-corrosion layer; S4: Inner lining extrusion, a 0.8-1.5mm thick high-density polyethylene inner lining is extruded outside the buffer water-blocking and anti-corrosion layer to form a continuous protective barrier; S5: Armor (3) anti-corrosion preparation, for cables with direct burial and high mechanical protection requirements, the armor substrate is first pretreated with nano epoxy anti-corrosion primer, and then the armor layer is formed. The gaps between the armor layers (3) are simultaneously filled with anti-corrosion lubricating grease to form an armor layer (3) that has both mechanical protection and anti-corrosion capabilities; S6: Outer sheath (11) extrusion, an outer sheath (11) with high weather resistance and corrosion resistance compounded with anti-ultraviolet, anti-oxidation and corrosion-resistant additives is extruded outside the armor layer (3). The sheath eccentricity is controlled to ≤8% to form the core radial anti-corrosion barrier of the cable.

9. The method for preparing a corrosion-resistant transmission line cable according to claim 8, characterized in that: In highly corrosive environments, an 80-200μm heavy-duty anti-corrosion coating is added to the outside of the outer sheath (11); The finished cable undergoes electron beam irradiation crosslinking modification, with the irradiation dose controlled at 120-200 kGy. After completing specific electrical, mechanical, and corrosion resistance tests on the finished cable, both ends of the cable are treated with anti-corrosion sealing.

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