Anti-corrosion and aging-resistant composite overhead insulated cable

Abstract

The application discloses an anti-corrosion and aging-resistant composite overhead insulated cable, and relates to the technical field of cables.The high-efficiency heat exchange support assembly is arranged on the inner insulation and the outer side;the gap between the heat-conducting support belts is filled with sealing rubber strips;the heat exchange frame is bonded with sealing gaskets on both sides;the flexible heat-conducting filling layer is filled with paraffin bags on one side;the steel wire mesh protective layer is wrapped with a cross-linked polyethylene outer layer;the cross-linked polyethylene outer layer is provided with a heat-blocking and deicing assembly;the air jacket ring is installed on the outer side of the cable;part of the heat is transferred to the heat-conducting card of the heat exchange frame through the flowing air in the cable;another part of the heat is transferred to the braided copper wire mesh through the inner heat-conducting pipe made of heat-conducting silica gel material;the heat is taken away by the air flowing outside the braided copper wire mesh;the multiple structures jointly play a role;the temperature in the cable is reduced;the cable is prevented from accelerating aging due to the excessively high temperature;and the service life of the cable is prolonged.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to an overhead insulated cable made of corrosion-resistant and aging-resistant composite materials. Background Technology

[0002] Overhead insulated cables are a new type of power transmission method that falls between traditional overhead bare conductors and underground cables. They feature a weather-resistant insulation layer extruded onto the conductor, retaining the advantages of convenient and low-cost overhead line installation while significantly improving the safety and reliability of power supply. Cross-linked polyethylene cables exhibit excellent performance in terms of aging resistance and corrosion resistance, which is the core reason why they have become the most widely used insulation material for corrosion and aging resistance.

[0003] However, the overhead insulated cables currently on the market generate heat during power transmission. Because overhead cables are directly exposed to sunlight, heat dissipation is insufficient during the process of external sunlight and internal temperature rise. As a result, the cable temperature gradually increases, and long-term use at high temperatures leads to accelerated aging and cracking of the cable insulation layer, reducing its service life and causing safety issues. Summary of the Invention

[0004] This invention provides an anti-corrosion and aging-resistant composite material overhead insulated cable, which can effectively solve the problems mentioned in the background art, such as the overhead insulated cable generating heat during power transmission, and the difficulty in heat dissipation due to direct sunlight exposure, which leads to a gradual increase in cable temperature. Long-term high-temperature use causes the cable insulation layer to age and crack, reducing its service life and causing safety issues.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a corrosion-resistant and aging-resistant composite material overhead insulated cable, comprising an inner conductive core, an inner insulation wrapped around the outer side of the inner conductive core, and a high-efficiency heat exchange support assembly disposed on the outer side of the inner insulation, the high-efficiency heat exchange support assembly comprising a heat-conducting support strip; The inner insulation is wrapped with a thermally conductive support strip on the outside, and the gaps between the thermally conductive support strips are filled with sealing strips; A heat exchange frame is movably sleeved on the outside of the heat-conducting support belt. A heat-conducting clip is welded inside the heat exchange frame at the corresponding position of the heat-conducting support belt. Sealing gaskets are adhered to both sides of the heat exchange frame. A flexible heat-conducting filling layer is filled between two opposite sealing gaskets. A paraffin bag is filled on one side of the flexible heat-conducting filling layer. The heat exchange rack and paraffin bag are wrapped with a wire mesh protective layer, and the wire mesh protective layer is wrapped with a cross-linked polyethylene outer layer. The wire mesh protective layer and the cross-linked polyethylene outer layer are symmetrically provided with central ventilation holes at the corresponding heat exchange rack positions. A ventilation collar is sleeved on the cross-linked polyethylene outer layer near the central ventilation hole. The ventilation sleeve has a lower ventilation hole below the middle ventilation hole. End sealing strips are symmetrically bonded inside the ventilation sleeve, and an expansion strip is bonded inside the ventilation sleeve at the top of the lower ventilation hole.

[0006] According to the above technical solution, the top ends of two adjacent ventilation sleeves are hinged to each other, and the bottom ends of the ventilation sleeves are symmetrically welded with connecting pieces. A water leakage hole is opened at the bottom end of the ventilation sleeve, and a fixing wire is movably installed inside the connecting piece.

[0007] According to the above technical solution, both ends of the heat exchange frame are provided with connecting grooves, and the connecting grooves are bonded with mating adhesive strips. The heat-conducting card is attached to the outside of the heat-conducting support strip.

[0008] According to the above technical solution, both the thermally conductive support strip and the sealing strip are spiral-shaped, and the outer sides of the thermally conductive support strip and the sealing strip are located within the same curved surface.

[0009] According to the above technical solution, a reinforcing hole is opened at one end of each of the three heat exchange racks. A reinforcing steel wire is installed inside the reinforcing hole. A braided copper wire mesh is wrapped around the outside of the reinforcing steel wire. An inner heat-conducting pipe is sleeved between the axially adjacent heat exchange racks. The outer side of the inner heat-conducting pipe is attached to the outer side of the heat-conducting support strip.

[0010] According to the above technical solution, the outer layer of the cross-linked polyethylene is provided with a heat-insulating and de-icing component, and the heat-insulating and de-icing component includes a protruding strip; The outer side of the cross-linked polyethylene outer layer is uniformly bonded with protruding strips, and a heat-insulating and reflective layer is uniformly coated between the protruding strips on the outer side of the cross-linked polyethylene outer layer. The heat-insulating reflective layer is fitted with an elastic C-shaped clip on the outside. Both ends of the elastic C-shaped clip are welded with adjustment plates. An adjustment hole is opened in the middle of the adjustment plate. An adjustment screw is movably installed inside the adjustment hole. A miniature electromagnet is installed at one end of the adjustment screw. A fixing nut is threaded to the other end of the adjustment screw. A conductive groove is opened in the middle of the fixing nut. A limit ring is fixedly fitted to the adjustment screw near the adjustment plate.

[0011] According to the above technical solution, an electric heating wire is installed in the middle of the outer side of the elastic C-shaped card, and conductive wires are connected to both ends of the electric heating wire near the adjustment hole. Connecting springs are uniformly welded to the outer side of the elastic C-shaped card, and a heat-conducting middle layer is bonded to the outer side of the elastic C-shaped card. The heat-conducting middle layer has spring holes corresponding to the connecting springs. The tops of several connecting springs are connected to an outer plate, and ice-breaking plates are symmetrically welded to the outer side of the outer plate.

[0012] According to the above technical solution, the elastic C-shaped card is symmetrically welded with a baffle plate at the lower ventilation hole, and the width of the baffle plate is greater than the width of the lower ventilation hole.

[0013] According to the above technical solution, the inner edge of the elastic C-type card is rounded, and a limiting slot is formed on the inner side of the elastic C-type card corresponding to the protruding strip.

[0014] According to the above technical solution, the ice-breaking plate has rounded corners at the ends, the elastic C-shaped card is coated with an insulating layer on the outside, the conductive wiring is C-shaped and surrounds the outside of the adjustment hole, and the two connection points of the miniature electromagnet are respectively connected to two adjustment screws through wires.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Equipped with a high-efficiency heat exchange support assembly, the inner center of the cable is reinforced with reinforcing steel wire, while the outer side of the inner insulation is reinforced and protected by a heat-conducting support strip, resulting in higher overall tensile strength and less susceptibility to damage; If the area where the cable is laid has strong sunlight and high temperature, a ventilation ring is installed on the outside of the cable. When the wind blows, the wind will enter the ventilation ring from the lower ventilation hole on one side. The flowing air passes through the inside of the cable. The outside air temperature is lower than the inside temperature of the cable. The heat generated by the inner conductive core during operation is transferred to the heat-conducting support strip through the inner insulation layer. The heat-conducting support strip transfers some of the heat to the heat-conducting card of the heat exchange frame, and another part of the heat is transferred to the braided copper wire mesh through the inner heat-conducting pipe of the heat-conducting silicone material. Then, the air flows away as it passes through the outside of the braided copper wire mesh, reducing the internal temperature of the cable and preventing the cable temperature from getting too high. In addition, some heat will be transferred from the outside of the flexible heat-conducting filling layer to the paraffin bag for absorption. Multiple structures work together to reduce the internal temperature of the cable, prevent the cable from aging prematurely due to excessive temperature, and extend the cable's service life.

[0016] 2. Equipped with a heat-insulating de-icing component, a flexible C-shaped clip is installed on the outside of the cable. When de-icing is required, a long rod with hooks that fit the conductive groove is connected to the conductive groove. The two hooks are connected to the conductive grooves at both ends of the flexible C-shaped clip, and the hooks are connected to the positive and negative terminals of the battery. When the micro electromagnets are energized, because the opposite polarities of the two micro electromagnets are opposite, they will push the two adjusting end plates away from each other after being energized. The flexible C-shaped clip deforms, and a gap appears between the flexible C-shaped clip and the cross-linked polyethylene outer layer. The heating wire is energized and heats up. The heat is transferred to the heat-conducting middle layer, the outer plate, and the ice-breaking plate. By pulling the long rod with hooks, the flexible C-shaped clip slides along the cable. Under the dual action of the ice-breaking plate and heating, the ice is quickly broken, preventing damage to the outer insulation layer of the cable due to excessive ice accumulation and low temperature, and further improving the safety of cable use. In summary, if the area where the cable is laid is a region with large temperature variations, both ventilation rings and flexible C-clamps should be installed simultaneously. Relying on the high-efficiency heat exchange support components and the heat-insulating and de-icing components, the two components work together to better protect the cable in harsh environments. In winter, when the temperature is low, pulling the flexible C-clamps close to the ventilation rings will block the ventilation holes through the baffle plate, preventing cold air from entering the cable. Furthermore, the paraffin inside the paraffin bag in the cable acts as a phase change material, releasing the internally stored heat at low temperatures to prevent the cable's internal temperature from becoming too low, thus better protecting the cable. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0018] In the attached diagram: Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the cable cross-section structure of the present invention; Figure 3 This is a schematic diagram of the structure of the high-efficiency heat exchange support assembly of the present invention; Figure 4 This is a schematic diagram of the installation structure of the heat exchanger frame of the present invention; Figure 5 This is the present invention. Figure 4 A schematic diagram of the structure of region A; Figure 6 This is a schematic diagram of the installation structure of the sealing strip of the present invention; Figure 7 This is a schematic diagram of the installation structure of the expansion strip of the present invention; Figure 8 This is a schematic diagram of the structure of the heat-insulating and de-icing component of the present invention; Figure 9 This is a schematic diagram of the installation structure of the thermally conductive middle layer of the present invention; Figure 10 This is a schematic diagram of the installation structure of the heating wire of the present invention; The diagram labels are: 1. Inner conductive core; 2. Inner insulation; 3. High-efficiency heat exchange support assembly; 301. Thermally conductive support strip; 302. Sealing strip; 303. Heat exchange frame; 304. Thermally conductive clip; 305. Sealing gasket; 307. Flexible thermally conductive filling layer; 308. Paraffin bag; 309. Steel wire mesh protective layer; 310. Cross-linked polyethylene outer layer; 311. Middle vent; 312. Ventilation collar; 313. Connecting piece; 314. Drain hole; 315. Fixing wire; 316. Lower vent; 317. End sealing strip; 318. Expansion strip; 319. Connecting groove; 320. Butt joint strip; 321. Reinforcing hole; 322. Reinforcing steel wire; 323. Braided copper wire mesh; 324. Inner heat-conducting pipe; 4. Heat-insulating and de-icing assembly; 401. Protruding strip; 402. Heat-insulating and reflective layer; 403. Elastic C-shaped clip; 404. Adjusting end piece; 405. Adjusting hole; 406. Adjusting screw; 407. Miniature electromagnet; 408. Fixing nut; 409. Conductive groove; 410. Limiting ring; 411. Heating wire; 412. Conductive wiring; 413. Connecting spring; 414. Heat-conducting middle layer; 415. Spring hole; 416. External plate; 417. Ice-breaking plate; 418. Baffle plate; 419. Limiting clip groove. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Example: Figure 1-10 As shown, the present invention provides a technical solution for an anti-corrosion and aging-resistant composite material overhead insulated cable, including an inner conductive core 1, an inner insulation 2 wrapped around the outer side of the inner conductive core 1, and a high-efficiency heat exchange support assembly 3 disposed on the outer side of the inner insulation 2. The high-efficiency heat exchange support assembly 3 includes a heat-conducting support strip 301, a sealing strip 302, a heat exchange frame 303, a heat-conducting clip 304, a sealing gasket 305, a flexible heat-conducting filling layer 307, a paraffin bag 308, a steel wire mesh protective layer 309, a cross-linked polyethylene outer layer 310, a middle ventilation hole 311, a ventilation collar 312, a connecting piece 313, a water leakage hole 314, a fixing wire 315, a lower ventilation hole 316, an end sealing strip 317, an expansion strip 318, a connecting groove 319, a butt joint strip 320, a reinforcing hole 321, a reinforcing steel wire 322, a braided copper wire mesh 323, and an inner heat-conducting pipe 324. The outer side of the inner insulation 2 is wrapped with a thermally conductive support strip 301. The gaps between the thermally conductive support strips 301 are filled with sealing strips 302. Both the thermally conductive support strips 301 and the sealing strips 302 are spiral-shaped. The outer sides of the thermally conductive support strips 301 and the sealing strips 302 are in the same curved surface, keeping the outer side of the inner conductive core 1 smooth and neat. A heat exchange frame 303 is movably sleeved on the outside of the heat-conducting support strip 301. A heat-conducting clip 304 is welded inside the heat exchange frame 303 corresponding to the heat-conducting support strip 301. Sealing gaskets 305 are bonded to both sides of the heat exchange frame 303. A flexible heat-conducting filler layer 307 is filled between the two opposite sealing gaskets 305. A paraffin bag 308 is filled on one side of the flexible heat-conducting filler layer 307. The heat exchange frame 303 and the paraffin bag 308 are wrapped with a wire mesh protective layer 309. The wire mesh protective layer 309 is wrapped with a cross-linked polyethylene outer layer 310. The wire mesh protective layer 309 and the cross-linked polyethylene outer layer 310 are symmetrically provided with central ventilation holes 311 at the heat exchange frame 303. A ventilation collar 312 is sleeved on the cross-linked polyethylene outer layer 310 near the central ventilation hole 311. The tops of two adjacent ventilation collars 312 are hinged to each other. Connecting pieces 313 are symmetrically welded to the bottom of the ventilation collars 312. A water leakage hole 314 is provided at the bottom of the ventilation collars 312. A fixing wire 315 is movably installed inside the connecting piece 313 to facilitate the installation of the ventilation collars 312. The ventilation collar 312 has a lower ventilation hole 316 below the middle ventilation hole 311. End sealing strips 317 are symmetrically bonded inside the ventilation collar 312. An expansion strip 318 is bonded inside the ventilation collar 312 at the top of the lower ventilation hole 316. Both ends of the heat exchange frame 303 have connecting grooves 319. A butt joint strip 320 is bonded inside the connecting grooves 319. The heat conduction clip 304 is attached to the outside of the heat conduction support strip 301, so that the gap at the connection point after the heat exchange frame 303 is assembled is smaller, reducing the entry of dust and water vapor into the cable.

[0021] Three heat exchange racks 303 have reinforcement holes 321 at opposite ends. Reinforcing steel wires 322 are installed inside the reinforcement holes 321. Braided copper wire mesh 323 is wrapped around the outside of the reinforcing steel wires 322. Inner heat-conducting pipes 324 are sleeved between axially adjacent heat exchange racks 303 at the braided copper wire mesh 323. The outside of the inner heat-conducting pipes 324 is attached to the outside of the heat-conducting support strip 301 to improve the tensile strength inside the cable.

[0022] The cross-linked polyethylene outer layer 310 is provided with a heat-insulating and de-icing component 4, which includes a protruding strip 401, a heat-insulating and reflective layer 402, an elastic C-shaped clip 403, an adjusting end piece 404, an adjusting hole 405, an adjusting screw 406, a miniature electromagnet 407, a fixing nut 408, a conductive groove 409, a limiting ring 410, a heating wire 411, a conductive wire 412, a connecting spring 413, a heat-conducting middle layer 414, a spring hole 415, an outer plate 416, an ice-breaking plate 417, a baffle plate 418, and a limiting slot 419. A protruding strip 401 is uniformly bonded to the outer side of the cross-linked polyethylene outer layer 310, and a heat-insulating and reflective layer 402 is uniformly coated between the protruding strips 401 on the outer side of the cross-linked polyethylene outer layer 310. An elastic C-shaped clip 403 is fitted onto the outer side of the heat-insulating reflective layer 402. The inner edge of the elastic C-shaped clip 403 is rounded. A limiting groove 419 is provided on the inner side of the elastic C-shaped clip 403 corresponding to the protruding strip 401 to prevent the elastic C-shaped clip 403 from shaking during installation. A baffle plate 418 is symmetrically welded to the elastic C-shaped clip 403 at the lower ventilation hole 316. The width of the baffle plate 418 is greater than the width of the lower ventilation hole 316 to facilitate the baffle plate 418 in blocking the lower ventilation hole 316. Both ends of the C-type card 403 are welded with adjustment end pieces 404. An adjustment hole 405 is opened in the middle of the adjustment end piece 404. An adjustment screw 406 is movably installed inside the adjustment hole 405. A miniature electromagnet 407 is installed at one end of the adjustment screw 406. A fixing nut 408 is threaded to the other end of the adjustment screw 406. A conductive groove 409 is opened in the middle of the fixing nut 408. A limit ring 410 is fixedly sleeved on the adjustment screw 406 near the adjustment end piece 404.

[0023] A heating wire 411 is installed on the middle of the outer side of the elastic C-type card 403. The two ends of the heating wire 411 are connected to conductive wires 412 near the adjustment hole 405. Connecting springs 413 are evenly welded on the outer side of the elastic C-type card 403. A heat-conducting middle layer 414 is bonded to the outer side of the elastic C-type card 403. The heat-conducting middle layer 414 has spring holes 415 corresponding to the connecting springs 413. The tops of several connecting springs 413 are connected to an outer plate 416. An ice-breaking plate 417 is symmetrically welded on the outer side of the outer plate 416. The ends of the ice-breaking plate 417 are rounded. An insulating layer is coated on the outer side of the elastic C-type card 403. The conductive wires 412 are C-shaped and surround the outer side of the adjustment hole 405. The two connection points of the miniature electromagnet 407 are connected to two adjusting screws 406 through wires to ensure that the miniature electromagnet 407 can work normally.

[0024] The working principle and usage process of this invention are as follows: When producing cables, the inner conductive core 1 is wrapped with inner insulation 2 by an extruder. The outer side of the inner insulation 2 is wrapped with a heat-conducting support strip 301, which is a steel strip. The spiral steel strips are filled with sealing strips 302. The outer side of the reinforcing steel wire 322 is wrapped with a braided copper wire mesh 323. Then, the inner heat-conducting tubes 324 are sleeved at equal intervals on the outer side of the braided copper wire mesh 323. Next, the inner conductive cores 1 are evenly arranged on the outside of the braided copper wire mesh 323. The heat exchange frame 303 is sleeved in the gap between the inner heat-conducting tubes 324. The heat-conducting card 304 is clipped to the outside of the heat-conducting support strip 301. The connecting groove 319 of the heat-conducting card 304 is filled with the mating rubber strip 320. The three heat-conducting cards 304 are spliced ​​together, and a prefabricated flexible heat-conducting filling layer 307 is placed between the splicing structures of the heat-conducting cards 304 in the axial direction. The flexible heat-conducting filling layer 307 is filled with a paraffin bag 308. Then, the steel wire mesh protective layer 309 is wrapped by a wrapping machine. The outer side of the steel wire mesh protective layer 309 is wrapped with a cross-linked polyethylene outer layer 310 by an extruder to complete the production of the cable body. The inner center of the cable is reinforced by a reinforcing steel wire 322, while the outer side of the inner insulation 2 is reinforced and protected by the heat-conducting support strip 301. The overall tensile strength of the cable is higher and it is not easy to be damaged. Choose to install other structures based on the environment in which the cable is laid. If the area where the cable is laid is not prone to freezing and the temperature is not high, the cable itself can be used directly. If the area where the cable is laid has strong sunlight and high temperature, a heat-insulating and reflective layer 402 is coated on the outside of the cross-linked polyethylene outer layer 310 to reduce the heat absorbed by the cable from sunlight. Press the outside of the cable. Since the heat exchange frame 303 is hollow, there is a noticeable indentation when pressing. At this time, the wire mesh protective layer 309 and the cross-linked polyethylene outer layer 310 at the heat exchange frame 303 are symmetrically opened with ventilation holes 311. Take the ventilation sleeve 312 and snap it into the ventilation hole 311. The end sealing strip 317 tightly squeezes the cross-linked polyethylene outer layer 310. The connecting piece 313 is directly below and perpendicular to the horizontal plane. The connecting piece 313 is fixed by the fixing wire 315. During cable use, when wind blows, the air enters the ventilation ring 312 from the lower ventilation hole 316 on one side, then enters the cavity inside the heat exchange frame 303 from the middle ventilation hole 311 on the same side, and then exits from the lower ventilation hole 316 on the other side. As the flowing air passes through the inside of the cable, and the outside air temperature is lower than the inside temperature of the cable, the heat generated by the inner conductive core 1 during operation is transferred to the thermally conductive support strip 301 through the inner insulation layer 2. The thermally conductive support strip 301 transfers some of the heat to the thermally conductive card 304 of the heat exchange frame 303, and the air flows through the thermally conductive card 304. The heat is carried away by the inner heat-conducting pipe 324 made of thermally conductive silicone material, and then the heat is carried away by the airflow as it passes over the outside of the braided copper wire mesh 323, thus reducing the internal temperature of the cable and preventing the cable temperature from getting too high. In addition, some heat is transferred from the outside of the flexible thermally conductive filling layer 307 to the paraffin bag 308 for absorption. The flexible thermally conductive filling layer 307 is made of halogen-free flame-retardant material with added metal powder. The multiple structures work together to reduce the internal temperature of the cable, prevent the cable from aging faster due to excessive temperature, and extend the service life of the cable. During rainy weather, a small amount of rainwater may enter the ventilation ring 312. Because the middle ventilation hole 311 is higher than the lower ventilation hole 316, the rainwater will not enter the heat exchange frame 303. The accumulated rainwater will be quickly discharged through the drain hole 314. A small amount of rainwater will also be absorbed by the expansion strip 318, blocking the passage between the middle ventilation hole 311 and the lower ventilation hole 316. This prevents rainwater from entering the cable due to heavy rain or cable shaking. Even if a small amount of rainwater enters the cable, the sealing gaskets 305 at both ends of the heat exchange frame 303 will further prevent water from approaching the inner insulation 2. Combined with the sealing effect of the sealing strip 302 between the heat-conducting support strips 301, safety is fully guaranteed, and short circuits caused by water ingress are prevented. If the area where the cable is laid has a low temperature and the outside of the cable is prone to icing, an adjusting screw 406 is passed through the adjusting hole 405 of the adjusting end piece 404 at the bottom of the elastic C-type clip 403. A limiting ring 410 is fitted against the inner side of the adjusting end piece 404. A fixing nut 408 is threaded onto one end of the adjusting screw 406. Pulling the limiting ring 410 tightly fits the adjusting end piece 404. With the two adjusting screws 406 installed, the miniature electromagnets 407, under the action of the elastic C-type clip 403, approach and press against each other, causing ice to accumulate on the outside of the cable. When de-icing is required, a long rod with hooks that fit the conductive groove 409 is connected to the conductive groove 409. The two hooks are respectively connected to the conductive grooves 409 at both ends of the elastic C-type clip 403. When the hook connects to the positive and negative terminals of the battery, the miniature electromagnet 407 is energized. Since the polarities of the two miniature electromagnets 407 are opposite, they will push the two adjusting end plates 404 away from each other after being energized. The elastic C-type card 403 deforms, and a gap appears between the elastic C-type card 403 and the cross-linked polyethylene outer layer 310. The heating wire 411 is energized and heats up. The heat is transferred to the heat-conducting middle layer 414, the outer plate 416 and the ice-breaking plate 417. By pulling the long rod with the hook, the elastic C-type card 403 slides along the cable. Under the dual action of the ice-breaking plate 417 and the heating, the ice is broken quickly, preventing the cable from being damaged due to excessive ice and low temperature, and further improving the safety of the cable. The heat-conducting middle layer 414 is made of foam metal, which greatly reduces weight while ensuring heat conduction. When the ice-breaking plate 417 slides along the cable, if the end of the ice-breaking plate 417 hits the outside of the cable, or if the ice layer is too hard and difficult to remove in one go, the outer plate 416 will be pushed away from the outside of the cable, and the connecting spring 413 in the spring hole 415 will extend to prevent the outside of the cable from being scratched and damaged by the ice-breaking plate 417. If the area where the cable is laid is a region with large temperature variations, then both the ventilation collar 312 and the flexible C-type clip 403 should be installed. Relying on the high-efficiency heat exchange support component 3 and the heat-insulating de-icing component 4, the cable can be better protected in harsh environments. In winter when the temperature is low, the flexible C-type clip 403 can be pulled close to the ventilation collar 312, and the ventilation hole 316 can be blocked by the shielding plate 418 to prevent cold air from entering the cable and prevent the internal temperature of the cable from becoming too low. In addition, the paraffin inside the paraffin bag 308 inside the cable is used as a phase change material to release the internal heat stored at low temperatures, preventing the internal temperature of the cable from becoming too low and better protecting the cable.

[0025] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A corrosion-resistant and aging-resistant composite material overhead insulated cable, comprising an inner conductive core (1), characterized in that: The inner conductive core (1) is wrapped with an inner insulation (2) on the outside, and a high-efficiency heat exchange support assembly (3) is provided on the outside of the inner insulation (2). The high-efficiency heat exchange support assembly (3) includes a heat-conducting support strip (301). The inner insulation (2) is wrapped with a thermally conductive support strip (301) on the outside, and the gaps between the thermally conductive support strips (301) are filled with sealing strips (302). A heat exchange frame (303) is movably sleeved on the outside of the heat-conducting support strip (301). A heat-conducting clip (304) is welded inside the heat exchange frame (303) at the location corresponding to the heat-conducting support strip (301). Sealing gaskets (305) are bonded to both sides of the heat exchange frame (303). A flexible heat-conducting filling layer (307) is filled between two opposite sealing gaskets (305). A paraffin bag (308) is filled on one side of the flexible heat-conducting filling layer (307). The heat exchange rack (303) and paraffin bag (308) are wrapped with a wire mesh protective layer (309), and the wire mesh protective layer (309) is wrapped with a cross-linked polyethylene outer layer (310). The wire mesh protective layer (309) and the cross-linked polyethylene outer layer (310) are symmetrically provided with central ventilation holes (311) at the heat exchange rack (303). A ventilation collar (312) is sleeved on the cross-linked polyethylene outer layer (310) near the central ventilation hole (311). The ventilation sleeve (312) has a lower ventilation hole (316) below the middle ventilation hole (311). The ventilation sleeve (312) has end sealing strips (317) symmetrically bonded inside. The ventilation sleeve (312) has an expansion strip (318) bonded at the top of the lower ventilation hole (316).

2. The corrosion-resistant and aging-resistant composite material overhead insulated cable according to claim 1, characterized in that, The top ends of two adjacent ventilation rings (312) are hinged to each other, and the bottom ends of the ventilation rings (312) are symmetrically welded with connecting pieces (313). The bottom ends of the ventilation rings (312) are provided with water leakage holes (314), and the connecting pieces (313) are movably installed with fixing wires (315).

3. The corrosion-resistant and aging-resistant composite material overhead insulated cable according to claim 1, characterized in that, The heat exchange rack (303) has connecting grooves (319) at both ends, and a mating strip (320) is bonded inside the connecting groove (319). The heat-conducting card (304) is attached to the outside of the heat-conducting support strip (301).

4. The corrosion-resistant and aging-resistant composite material overhead insulated cable according to claim 1, characterized in that, Both the thermally conductive support strip (301) and the sealing strip (302) are spiral-shaped, and the outer sides of the thermally conductive support strip (301) and the sealing strip (302) are within the same curved surface.

5. The corrosion-resistant and aging-resistant composite material overhead insulated cable according to claim 1, characterized in that, The three heat exchange racks (303) have a reinforcing hole (321) at one end opposite to each other. A reinforcing steel wire (322) is installed inside the reinforcing hole (321). A woven copper wire mesh (323) is wrapped around the outside of the reinforcing steel wire (322). An inner heat-conducting pipe (324) is sleeved between the axially adjacent heat exchange racks (303) of the woven copper wire mesh (323). The outer side of the inner heat-conducting pipe (324) is attached to the outer side of the heat-conducting support strip (301).

6. The corrosion-resistant and aging-resistant composite material overhead insulated cable according to claim 1, characterized in that, The cross-linked polyethylene outer layer (310) is provided with a heat-insulating and de-icing component (4), which includes a protruding strip (401). The outer side of the cross-linked polyethylene outer layer (310) is uniformly bonded with protruding strips (401), and the outer side of the cross-linked polyethylene outer layer (310) is uniformly coated with a heat-insulating and reflective layer (402) between the protruding strips (401). The heat-insulating reflective layer (402) is sleeved with an elastic C-shaped clip (403). Both ends of the elastic C-shaped clip (403) are welded with adjustment end pieces (404). An adjustment hole (405) is opened in the middle of the adjustment end piece (404). An adjustment screw (406) is movably installed inside the adjustment hole (405). A miniature electromagnet (407) is installed at one end of the adjustment screw (406). A fixing nut (408) is threaded to the other end of the adjustment screw (406). A conductive groove (409) is opened in the middle of the fixing nut (408). A limit ring (410) is fixedly sleeved on the adjustment screw (406) near the adjustment end piece (404).

7. The corrosion-resistant and aging-resistant composite material overhead insulated cable according to claim 6, characterized in that, A heating wire (411) is installed in the middle of the outer side of the elastic C-type card (403). The two ends of the heating wire (411) are connected to conductive wires (412) near the adjustment hole (405). A connecting spring (413) is uniformly welded on the outer side of the elastic C-type card (403). A heat-conducting middle layer (414) is bonded to the outer side of the elastic C-type card (403). A spring hole (415) is opened on the heat-conducting middle layer (414) corresponding to the connecting spring (413). The top of several connecting springs (413) are connected to an outer plate (416). An ice-breaking plate (417) is symmetrically welded on the outer side of the outer plate (416).

8. The corrosion-resistant and aging-resistant composite material overhead insulated cable according to claim 6, characterized in that, The elastic C-type card (403) is symmetrically welded with a baffle plate (418) at the lower ventilation hole (316), and the width of the baffle plate (418) is greater than the width of the lower ventilation hole (316).

9. The corrosion-resistant and aging-resistant composite material overhead insulated cable according to claim 6, characterized in that, The inner edge of the elastic C-type card (403) is rounded, and a limiting slot (419) is provided on the inner side of the elastic C-type card (403) corresponding to the protruding strip (401).

10. The corrosion-resistant and aging-resistant composite material overhead insulated cable according to claim 7, characterized in that, The ice-breaking plate (417) has rounded corners at the end, the elastic C-type clip (403) is coated with an insulating layer on the outside, the conductive wire (412) is C-shaped and surrounds the outside of the adjustment hole (405), and the two connection points of the miniature electromagnet (407) are respectively connected to the two adjustment screws (406) through wires.

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