Low-temperature-resistant and ice-coating-resistant enhanced overhead cable for complex climate environment
By introducing anti-freezing and de-icing mechanisms and internal reinforcement mechanisms into overhead cables, and utilizing wind disturbance and heat conduction technologies, the problems of cable embrittlement and icing at low temperatures have been solved, achieving efficient and stable de-icing and improved mechanical strength.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 河北宇琼线缆有限公司
- Filing Date
- 2026-05-11
- Publication Date
- 2026-06-09
AI Technical Summary
Existing overhead cables are prone to brittleness in low-temperature environments, and the icing mechanism relies on the surface coating. If the coating wears off and de-icing is not done in time, the cables will break. Furthermore, manual and mechanical de-icing is time-consuming and labor-intensive.
An overhead cable including an anti-freezing and de-icing mechanism and an internal reinforcement mechanism was designed. The anti-freezing and de-icing mechanism forms an openable protective structure through an outer sheath, locking ring, and slip ring. It actively de-ices by utilizing wind disturbance and achieves thermal melting and mechanical stripping by combining the heat conduction structure of honeycomb pads and ribs. The internal reinforcement mechanism provides stable support through constraint rings and support rings, restricts deformation, and constructs a three-dimensional mechanical stress relief network.
It improves the stability and mechanical strength of cables in low-temperature environments, enables timely and effective de-icing, reduces the difficulty of ice removal, and enhances the weather resistance of cables in complex climatic environments.
Smart Images
Figure CN122177570A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of power cable technology, specifically to a low-temperature and icing-resistant reinforced overhead cable for use in complex climatic environments. Background Technology
[0002] As the backbone of power transmission, overhead cables are often exposed to various harsh natural environments. In frigid regions, rain and snow are often accompanied by strong winds, and traditional cables face two major challenges: first, low-temperature embrittlement, where the toughness of cable materials decreases under extreme cold, making them prone to cracking, affecting electrical performance and service life; second, icing disasters, where thick ice layers accumulate on the surface of cables during rain, snow, and freezing weather, increasing vertical load and causing serious accidents such as line breakage and tower collapse. Chinese patent discloses an outdoor de-icing cable, application number: CN202211245044.1. When frost appears on the outside of the cable, it can push the upper end of the frost on the outside of the cable to create a notch, thereby allowing the frost to detach from the cable; reducing the weight of the cable and avoiding large-scale power outage accidents caused by the cable breaking due to excessive frost accumulation, and ensuring the stable operation of the transmission ring in cold weather. Chinese patent discloses a de-icing cable, application number: CN201820907085.5. Its heat-conducting ring heats the antifreeze layer to achieve the antifreeze effect. The heat-conducting ring is provided with a heat dissipation rectangular groove, which has certain heat dissipation conditions. This makes the cable inside the antifreeze layer have a certain stability, while the middle part of the cable is not easy to generate heat. This avoids the disadvantage of most of the heat generated by the outer cable core being directly transferred to the inner cable core, thus increasing the service life of the cable. However, current overhead cables typically enhance their low-temperature resistance by stacking materials, and their anti-icing mechanism passively relies on the hydrophobic and ice-repellent coating on the surface. The effectiveness of this coating decreases as it wears down, requiring subsequent manual or mechanical de-icing. This is not only time-consuming and labor-intensive, but also prone to causing the cable to become brittle and break due to prolonged overload caused by wind disturbances if de-icing is not done in time. Summary of the Invention
[0003] This invention provides a low-temperature and icing-resistant reinforced overhead cable for complex climatic environments. It can effectively solve the problems mentioned in the background art, where current overhead cables typically enhance their low-temperature resistance by stacking materials, and the anti-icing mechanism passively relies on the surface coating of hydrophobic and ice-repellent coatings. The effectiveness of these coatings decreases as the coating wears down, requiring subsequent manual or mechanical de-icing, which is not only time-consuming and labor-intensive, but also prone to cable embrittlement and breakage due to prolonged overload and wind disturbance caused by untimely de-icing.
[0004] To achieve the above objectives, the present invention provides the following technical solution: a low-temperature resistant and icing-resistant enhanced overhead cable for complex climatic environments, comprising a sheath, wherein a plurality of cable cores are inserted at equal angles along the circumferential direction inside the sheath, and an anti-freezing and de-icing mechanism is installed on the outside of the cable cores; The antifreeze and de-icing mechanism includes an outer cover; An outer cover is fitted onto the outer side of the sheath. A plurality of locking rings and sliding rings are evenly and equidistantly installed on the outer side of the outer cover. A plurality of locking strips are installed at equal angles along the circumferential direction on the side end faces of the locking rings. A guide rib is provided on the side end faces of the locking strips. An air groove is opened on the outer curved surface of the locking strips. A plurality of inserts are installed at equal angles along the circumferential direction on the side end faces of the sliding rings. A guide groove is opened on the side end faces of the inserts. A honeycomb pad is installed inside the sheath at the outer position of the cable core. Several telescopic pads are uniformly and equidistantly fitted on the outer side of the honeycomb pad. Several slots are set at equal angles along the circumferential direction on the outer curved surface of several telescopic pads. Several guide nozzles are set at equal angles along the circumferential direction on both sides of the inner curved surface of several telescopic pads. A locking sleeve is fitted on the outer side of the telescopic pad. Several rib rings are uniformly and equidistantly installed on the outer side of the locking sleeve. Several arc grooves are opened at equal angles along the circumferential direction on the outer curved surface of several rib rings.
[0005] Preferably, an insulating sleeve is fitted onto the outer side of the cable core, a shielding sleeve is embedded in the inner wall of the insulating sleeve, and thermally conductive silicone grease is filled inside the insulating sleeve at the position on the outer side of the cable core.
[0006] Preferably, ribs are installed at equal angles along the circumferential direction on both end faces of the rib ring, and the ribs are spirally wound around the outside of the lock sleeve, and the sheath, lock sleeve, rib ring and ribs are enclosed to form a heat exchange gap along the axial direction of the cable.
[0007] Preferably, the locking ring is fixedly connected to the outer cover, the sliding ring is slidably connected to the outer cover, and the locking ring and the sliding ring are distributed adjacent to each other.
[0008] Preferably, the card strip and the insert strip are distributed adjacent to each other, and the card strip is slidably connected to the guide groove on the adjacent insert strip through the guide rib. The cross-section of the air duct is dovetail-shaped, and the width of the air duct opening gradually increases from the bottom of the duct to the opening.
[0009] Preferably, the honeycomb pad has a honeycomb structure inside, the guide nozzle is connected to the outer side of the honeycomb pad, the arc groove is connected to the slot, the honeycomb pad is made of aramid paper, and the telescopic pad is made of rubber.
[0010] Preferably, an internal reinforcement mechanism is installed on the inner side of the sheath; The internal reinforcement mechanism includes a constraint ring; The inner wall of the lock sleeve is evenly and equidistantly equipped with several constraint rings. Support rings are installed on both sides of the constraint rings. Several side ribs are installed at equal angles along the circumferential direction on both sides of the end face of the constraint rings. Several protruding ribs are installed at equal angles along the circumferential direction on the inner wall of the lock sleeve. Grooves are provided at the corresponding positions of the protruding ribs on the outer curved surfaces of the constraint rings, support rings, and side ribs. Guide holes are opened on the end faces of several of the protruding ribs, and reinforcing ribs are inserted inside the guide holes. The outer curved surface of the honeycomb pad is evenly provided with several grooves at equal intervals. The inner wall of the telescopic pad is equipped with a hoop at the position corresponding to the groove. A guide ring is installed in the middle of the side end face of the honeycomb pad. A cable is inserted through the inner side of the guide ring. A pad is installed inside the sheath at both ends of the honeycomb pad. A center nut is rotatably installed in the middle of the side end face of the pad. Threaded heads are installed at both ends of the cable. A ring frame is rotatably installed on the outer curved surface of the pad. Several side nuts are rotatably installed on the side end face of the ring frame along the circumferential direction at equal angles. Both ends of the reinforcing rib are connected to a screw rod.
[0011] Preferably, the constraint ring and the support ring are arranged alternately along the cable axis, and the constraint ring and its surface groove and the support ring and its surface groove both form a wavy cross section. The constraint ring is a rigid ring and the support ring is an elastic ring.
[0012] Preferably, the two ends of the side rib are connected to the constraint ring and the support ring respectively, the convex rib matches the groove, and the ring groove matches the hoop.
[0013] Preferably, the reinforcing rib is connected to the side nut via a screw rod, and the cable is connected to the center nut via a threaded head.
[0014] Compared with the prior art, the advantages of the present invention are: the present invention has a scientific and reasonable structure and is safe and convenient to use; 1. Equipped with an anti-freezing and de-icing mechanism, the outer cover, locking ring, and slip ring work together to form an outer protective structure, providing stable limiting support for the clamping strip and guide rib. With the limiting and guiding function of the insert and guide groove, it can form an openable de-icing protection structure. On the one hand, in the frigid environment, the wind disturbance can cause relative displacement between segments, generating a pulling force on the external ice. Through discontinuous surface movement, the bonding force of the ice connection surface is reduced, achieving active de-icing. In addition, the dovetail-shaped concave structure of the wind duct can form natural stress concentration points inside the ice. When the ice layer generates internal stress due to temperature changes and cable swing, cracks can preferentially initiate and propagate from these stress concentration points, reducing the external force required for the ice layer to collapse as a whole. On the other hand, the openable circumferential covering structure composed of locking rings, slip rings, clamps, and guide ribs can provide all-round protection for the cable when it is not covered with ice. It can not only consume the disturbance force and tearing force borne by the cable during the swinging process through relative displacement during wind disturbance, further reducing the risk of cable embrittlement and tearing in cold environment, but also increase the difficulty of ice formation, realizing early prevention of cable icing. With the directional conduction effect of honeycomb pads, telescopic pads, slots, guide nozzles, locking sleeves, rib rings, ribs, and arc grooves, the heat emitted by the cable core can be evenly and efficiently delivered to the interface between the ice and the cable. In the early stage of icing, the heat generated by the cable core during operation can be used for thermal intervention to reduce the bonding force of the ice interface and ensure its performance stability in cold environment. In addition, the wind groove can form an airflow acceleration cavity, causing the clamp to generate high-frequency micro-vibration, further shaking off the surface ice, forming a triple de-icing mechanism of thermal melting contact surface, mechanical peeling, and vibration removal, which can achieve more timely and reliable de-icing work and avoid the accumulation of ice and the resulting increase in bonding force that is difficult to remove.
[0015] 2. The internal reinforcement mechanism, consisting of a constraint ring, a support ring, and side ribs, forms an internal support structure that provides stable auxiliary support for the cable, limits its deformation and bending, and restricts its sway. This enhances the cable's balance and stability during wind disturbances and ice accumulation. Furthermore, the elasticity of the support ring and side ribs is fully utilized, effectively employing compression and rebound mechanisms to more efficiently absorb radial impact energy, achieving stable stress relief and buffering. In addition, the honeycomb structure within the honeycomb pad automatically redistributes the internal tension when the cable deforms due to external disturbances, resulting in corresponding expansion and contraction, further resisting deformation and improving the overall stability of the cable, thus achieving efficient radial protection. With the locking and clamping functions of grooves, ribs, and ring grooves and hoops, uncontrollable misalignment and displacement of the internal structure of the cable can be avoided, ensuring the stability of the internal structure of the cable. In addition, the linkage of reinforcing ribs and cables, as well as the axial limiting functions of guide rings, pads, center nuts, threaded heads, ring frames, side nuts and screws, can form a synchronous force transmission network between adjacent constraint rings and support rings. Through the axial sliding and torsion of reinforcing ribs and cables, the axial and torsional loads can be dispersed and consumed, forming a three-dimensional omnidirectional mechanical force relief network. This comprehensively improves the mechanical strength of the cable during use, making it more compatible with complex external climatic environments such as rain, snow and strong winds, and greatly improving weather resistance.
[0016] In summary, this cable not only accurately and efficiently delivers the internal heat generated by the cable core to the icing interface, weakening the icing anchoring force, but also actively tears away the icing through its openable wrapping structure. Furthermore, it can utilize external wind to generate high-frequency micro-vibrations, actively shaking off the icing. This forms a triple de-icing mechanism of thermal melting contact, mechanical peeling, and vibration removal, achieving more timely, efficient, and stable icing protection and reducing the difficulty of icing removal. At the same time, it constructs independent stress relief channels in the radial, axial, and torsional three-dimensional directions, comprehensively improving the mechanical strength of the cable during use, enabling it to stably adapt to complex climatic environments such as rain, snow, and strong winds. 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 schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the locking ring mounting structure of the present invention; Figure 3 This is a schematic diagram of the cable core installation structure of the present invention; Figure 4 This is a schematic diagram of the card strip installation structure of the present invention; Figure 5 This is a schematic diagram of the antifreeze and de-icing mechanism of the present invention; Figure 6 This is a schematic diagram of the internal reinforcement mechanism of the present invention; Figure 7 This is a schematic diagram of the hoop installation structure of the present invention; Figure 8 This is a schematic diagram of the rib ring mounting structure of the present invention; The diagram labels are: 1. Sheath; 11. Cable core; 12. Thermal grease; 13. Shielding sleeve; 14. Insulating sleeve. 20. Anti-freezing and de-icing mechanism; 201. Outer cover; 202. Locking ring; 203. Slip ring; 204. Locking strip; 205. Guide rib; 206. Air duct; 207. Insert strip; 208. Guide groove; 209. Honeycomb pad; 210. Telescopic pad; 211. Groove; 212. Guide nozzle; 213. Locking sleeve; 214. Rib ring; 215. Rib; 216. Arc groove; 30. Internal reinforcement mechanism; 301. Constraint ring; 302. Support ring; 303. Side rib; 304. Groove; 305. Protruding rib; 306. Guide hole; 307. Reinforcing rib; 308. Ring groove; 309. Hoop; 310. Guide ring; 311. Cable; 312. Pad; 313. Center nut; 314. Threaded head; 315. Ring frame; 316. Side nut; 317. Lead screw. 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 1-8 As shown, the present invention provides a technical solution: a low-temperature and icing-resistant reinforced overhead cable for complex climatic environments, comprising a sheath 1, wherein a plurality of cable cores 11 are inserted at equal angles along the circumferential direction inside the sheath 1, an insulating sleeve 14 is sleeved on the outside of the cable cores 11, a shielding sleeve 13 is embedded in the inner wall of the insulating sleeve 14, and thermally conductive silicone grease 12 is filled inside the insulating sleeve 14 at the position outside the cable cores 11 to provide stable insulation and shielding protection, and an anti-freezing and de-icing mechanism 20 is installed on the outside of the cable cores 11; The antifreeze and de-icing mechanism 20 includes an outer cover 201; The outer sleeve 201 is sleeved on the outside of the sheath 1. A number of locking rings 202 and sliding rings 203 are evenly installed on the outer side of the outer sleeve 201 at equal intervals. The locking rings 202 are fixedly connected to the outer sleeve 201, and the sliding rings 203 are slidably connected to the outer sleeve 201. The locking rings 202 and the sliding rings 203 are distributed adjacent to each other to achieve mechanical de-icing and provide more comprehensive protection. A number of locking strips 204 are installed at equal angles along the circumferential direction on the side end face of the locking rings 202. Guide ribs 205 are provided on the side end face of the locking strips 204. Several clips 204 have wind grooves 206 on their outer curved surfaces. Several slip rings 203 have several inserts 207 installed at equal angles along the circumferential direction on their side end faces. Several inserts 207 have guide grooves 208 on their side end faces. Several clips 204 and several inserts 207 are distributed adjacent to each other. The clips 204 are slidably connected to the guide grooves 208 on the adjacent inserts 207 through guide ribs 205. The cross-section of the wind groove 206 is dovetail-shaped, and the width of the wind groove 206 gradually increases from the bottom of the groove to the opening, so as to guide the wind force and realize wind-induced de-icing. Inside the sheath 1, a honeycomb pad 209 is installed at the position outside the cable core 11. Several telescopic pads 210 are evenly and equidistantly sleeved on the outside of the honeycomb pad 209. Several slots 211 are set at equal angles along the circumferential direction on the outer curved surface of the several telescopic pads 210. Several guide nozzles 212 are set at equal angles along the circumferential direction on both sides of the inner curved surface of the several telescopic pads 210. A locking sleeve 213 is sleeved on the outside of the telescopic pads 210. A number of rib rings 214 are evenly and equidistantly installed on the outer side of the locking sleeve 213. A number of ribs 215 are installed at equal angles along the circumferential direction on both ends of the rib rings 214. The ribs 215 are spirally wrapped around the outer side of the locking sleeve 213. The sheath 1, locking sleeve 213, rib rings 214 and ribs 215 are enclosed in a number of heat exchange gaps along the axial direction of the cable to achieve stable heat conduction. A number of arc grooves 216 are opened at equal angles along the circumferential direction on the outer curved surface of the rib rings 214. The honeycomb pad 209 has a honeycomb structure inside. The guide nozzle 212 is connected to the outer side of the honeycomb pad 209. The arc grooves 216 are connected to the slots 211. The honeycomb pad 209 is made of aramid paper and the expansion pad 210 is made of rubber to conduct heat in a directional manner.
[0021] An internal reinforcement mechanism 30 is installed on the inside of the sheath 1; The internal reinforcement mechanism 30 includes a constraint ring 301; A number of constraint rings 301 are evenly and equidistantly installed on the inner wall of the lock sleeve 213. Support rings 302 are installed on both sides of the constraint rings 301. A number of side ribs 303 are installed at equal angles along the circumferential direction on both sides of the end face of the constraint rings 301. A number of protruding ribs 305 are installed at equal angles along the circumferential direction on the inner wall of the lock sleeve 213. Grooves 304 are provided at the corresponding positions of the protruding ribs 305 on the outer curved surfaces of the constraint rings 301, support rings 302 and side ribs 303. The constraint rings 301 and support rings 302 are arranged alternately along the cable axis. The constraint rings 301 and their surface grooves 304, as well as the support rings 302 and their surface grooves 304, all form a wave-shaped cross section. The constraint rings 301 are rigid rings and the support rings 302 are elastic rings to provide stable radial support force for the cable. The end faces of the protruding ribs 305 are provided with guide holes 306. Reinforcing ribs 307 are inserted inside the guide holes 306. The outer curved surface of the honeycomb pad 209 is evenly provided with several grooves 308. The inner wall of the telescopic pad 210 is equipped with a hoop 309 at the position corresponding to the grooves 308. The two ends of the side rib 303 are connected to the constraint ring 301 and the support ring 302 respectively. The protruding rib 305 fits into the groove 304. The grooves 308 fit into the hoop 309 to avoid misalignment of the internal structure of the cable. A guide ring 310 is installed in the middle of the side end face of the honeycomb pad 209. A cable strip 311 is inserted inside the guide ring 310. A pad plate 312 is installed inside the sheath 1 at the positions corresponding to both ends of the honeycomb pad 209. A center nut 313 is rotatably installed in the middle of the side end face of the pad 312. Threaded heads 314 are installed at both ends of the cable 311. A ring frame 315 is rotatably installed on the outer curved surface of the pad 312. Several side nuts 316 are rotatably installed on the side end face of the ring frame 315 at equal angles along the circumferential direction. Both ends of the reinforcing rib 307 are connected to screw rods 317. The reinforcing rib 307 is connected to the side nuts 316 through the screw rods 317. The cable 311 is connected to the center nut 313 through the threaded heads 314 to construct three-dimensional protection.
[0022] The working principle and usage process of this invention: This low-temperature and icing-resistant reinforced overhead cable for complex climatic environments can be modularly assembled after the inner and outer structures of the sheath 1 are processed separately during the production process. In actual use, the appropriate specifications of cable are selected according to the actual usage requirements, and the cable is erected. After the cable is erected to the appropriate height and the corresponding wiring connection is completed, it can be put into use. During the actual operation of the cable, the cable core 11 will generate heat as the transmission work progresses. Under the protective cover of the honeycomb pad 209, the heat will be prevented from being ineffectively conducted to the axial direction of the cable core 11. The heat emitted by the cable core 11 will spontaneously conduct radially to the relatively low temperature area outside along the internal air gap of the honeycomb pad 209, and under the conduction of the guide nozzle 212, it will be conducted to the internal gap of the telescopic pad 210. Under the guidance of the slot 211, it will be conducted to the heat exchange air gap formed by the sheath 1, the locking sleeve 213, the rib ring 214 and the rib 215. This can further promote heat dissipation of cable core 11, improve heat dissipation effectiveness, and ensure its performance stability in cold environments. Furthermore, in rainy or snowy weather, when the outside of the cable is covered with ice, heat can be radially delivered to the interface between the ice and the cable, which helps to reduce the contact point bonding degree, thereby reducing the ice anchoring force and providing a prerequisite for ice removal work. In the actual use of overhead cables, the cables will sway under the wind, and correspondingly, they will produce wave-like twisting and swaying. During this process, the expansion pad 210 will deform accordingly, twisting and expanding back and forth. Furthermore, during the reciprocating twisting and stretching process of the expansion pad 210, the internal air pressure environment will change. With the connection of the guide nozzle 212, the slot 211 and the arc groove 216, the temperature of the airflow in the air gap inside the honeycomb pad 209 will rise due to the heating of the cable core 11, forming an airflow carrying heat. The cold airflow in the heat exchange air gap formed by the sheath 1, the locking sleeve 213, the rib ring 214 and the rib 215 will converge and exchange heat rapidly inside the expansion pad 210, forming a neutral airflow. Part of the neutralized airflow is injected into the air gap inside the honeycomb pad 209 through the guide nozzle 212, while part of the neutralized airflow is injected into the heat exchange air gap formed by the sheath 1, the locking sleeve 213, the rib ring 214 and the rib 215 through the slot 211 and the arc groove 216, which accelerates the radial transfer process of the heat generated by the cable core 11. Furthermore, during the use of cables, the overhead environment itself makes the cables susceptible to wind impact. In addition, rain and snow weather are often accompanied by strong winds and hot and cold convection, which causes the cables to frequently produce S-shaped twisting and swaying during use. The twisting and swaying of the cables will cause the telescopic pad 210 to twist and expand and contract. As long as the telescopic pad 210 expands and contracts, it will drive the internal airflow in a directional manner, realize heat exchange, and make the above process stable. Meanwhile, under the limiting guidance of rib 215, the airflow injected into the heat exchange gap formed by the sheath 1, locking sleeve 213, rib ring 214 and rib 215 will flow around the cable along the axial direction, and perform heat treatment on the interface between the ice and the cable more evenly and efficiently, reducing the degree of bonding of the interface. Similarly, under the influence of wind, as the cable bends and twists due to its swing, the locking ring 202 and the slip ring 203 will both shift relative to each other, and the locking strip 204 and the insert strip 207 will be pulled accordingly. Under the limiting action of the guide rib 205 and the guide groove 208, the locking strip 204 and the insert strip 207 will slide relative to each other. On the one hand, this can increase the difficulty of ice formation when the cable is not covered with ice, thus achieving early prevention. On the other hand, it can pull on the external ice when it is covered with ice. In addition, the heat generated by the cable core 11 will perform real-time heat treatment on the cable surface, so that the bonding surface between the ice and the cable will no longer be in contact. Combined with the swinging motion of the cable, it can promote the separation of the ice from the cable. Meanwhile, since the cross-section of the air duct 206 is dovetail-shaped, the width of the duct opening gradually increases from the bottom to the opening, forming an airflow acceleration chamber. When the cable swings or bends under the action of wind, the airflow is accelerated through the guide channel formed by the air duct 206 and impacts the back of the clip 204, causing the clip 204 to generate high-frequency micro-vibration, shaking off the surface ice. This not only promotes the rapid and stable separation of ice from the cable during icing, avoiding the accumulation of ice due to untimely cleaning, and achieving thin ice removal, but also interferes with the formation of ice when it is not iced, preventing icing in advance. In addition to the aforementioned process, it is carried out simultaneously in the early stage of icing. Under the condition of low wind force that can make the cable swing, triple synchronous de-icing can be achieved. Combined with wind vibration, it can shake off the broken ice in a timely and efficient manner, ensuring the timeliness of de-icing, reducing the load pressure on the cable, and preventing the opening and closing mechanism composed of locking ring 202, slip ring 203, clamping strip 204, guide rib 205, wind channel 206, insert strip 207 and guide channel 208 from freezing and jamming in the low temperature icing environment due to ice accumulation. In addition, the opening and closing circumferential covering structure composed of locking ring 202, slip ring 203, clamping strip 204, guide rib 205, insert strip 207 and guide groove 208 can provide all-round protection for the cable when it is not covered with ice. It can also consume the disturbance force and tearing force borne by the cable during the swinging process through relative displacement during wind disturbance, further reducing the risk of cable embrittlement and tearing in cold environment. Similarly, during the use of the cable, when the cable is subjected to wind impact and ice pressure, during the swinging process of the cable, the constraint ring 301 will cooperate with the support ring 302 and the side rib 303 to provide stable auxiliary support for the cable and limit the degree of deformation and bending of the cable, and limit its swing amplitude. The support ring 302 and the side rib 303 will also absorb radial impact energy through the compression and rebound of their own structure. In addition, the internal honeycomb structure of the honeycomb pad 209 will change the tension generated inside the cable when it is deformed by external disturbance. Through this automatic redistribution of internal forces, deformation can be further resisted and the overall stability of the cable can be improved. Meanwhile, the limiting effect of the groove 304, the rib 305, the ring groove 308, and the hoop 309 can prevent uncontrollable misalignment of the internal structure of the cable. In addition, the axial limiting effect of the reinforcing rib 307 and the cable 311 can achieve the dispersion and consumption of axial and torsional loads between adjacent constraint rings 301 and support rings 302 through the axial sliding and torsion of the reinforcing rib 307 and the cable 311, forming a three-dimensional omnidirectional mechanical stress relief network, which comprehensively improves the mechanical strength of the cable during use and makes it compatible with complex external climatic environments.
[0023] 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 low-temperature resistant and icing-resistant reinforced overhead cable for complex climatic environments, comprising a sheath (1), characterized in that: The sheath (1) has several cable cores (11) inserted at equal angles along the circumference, and the cable cores (11) are equipped with an anti-freezing and de-icing mechanism (20) on the outside. The antifreeze and de-icing mechanism (20) includes an outer cover (201); The outer sleeve (201) is sleeved on the outer side of the sheath (1). A plurality of locking rings (202) and slip rings (203) are evenly and equidistantly installed on the outer side of the outer sleeve (201). A plurality of locking strips (204) are installed at equal angles along the circumferential direction on the side end faces of the locking rings (202). A guide rib (205) is provided on the side end faces of the locking strips (204). A wind groove (206) is opened on the outer curved surface of the locking strips (204). A plurality of inserts (207) are installed at equal angles along the circumferential direction on the side end faces of the slip rings (203). A guide groove (208) is opened on the side end faces of the inserts (207). Inside the sheath (1), a honeycomb pad (209) is installed at the position outside the cable core (11). A number of telescopic pads (210) are uniformly and evenly sleeved on the outside of the honeycomb pad (209). A number of slots (211) are set at equal angles along the circumferential direction on the outer curved surface of the telescopic pads (210). A number of guide nozzles (212) are set at equal angles along the circumferential direction on both sides of the inner curved surface of the telescopic pads (210). A locking sleeve (213) is sleeved on the outside of the telescopic pads (210). A number of rib rings (214) are uniformly and evenly installed on the outside of the locking sleeve (213). A number of arc grooves (216) are opened at equal angles along the circumferential direction on the outer curved surface of the rib rings (214).
2. The low-temperature resistant and icing-resistant reinforced overhead cable for complex climatic environments according to claim 1, characterized in that, An insulating sleeve (14) is fitted on the outside of the cable core (11), and a shielding sleeve (13) is embedded in the inner wall of the insulating sleeve (14). The inside of the insulating sleeve (14) located on the outside of the cable core (11) is filled with thermally conductive silicone grease (12).
3. The low-temperature resistant and icing-resistant reinforced overhead cable for complex climatic environments according to claim 1, characterized in that, The two end faces of the rib ring (214) are each equipped with a number of ribs (215) at equal angles along the circumferential direction. The ribs (215) are spirally wrapped around the outside of the lock sleeve (213), and the sheath (1), lock sleeve (213), rib ring (214) and ribs (215) are enclosed in a number of heat exchange gaps along the axial direction of the cable.
4. The low-temperature resistant and icing-resistant reinforced overhead cable for complex climatic environments according to claim 1, characterized in that, The locking ring (202) is fixedly connected to the outer cover (201), and the sliding ring (203) is slidably connected to the outer cover (201), with the locking ring (202) and the sliding ring (203) distributed adjacent to each other.
5. A low-temperature resistant and icing-resistant reinforced overhead cable for complex climatic environments according to claim 1, characterized in that, The card strip (204) and the insert strip (207) are distributed adjacent to each other, and the card strip (204) is slidably connected to the guide groove (208) on the adjacent insert strip (207) through the guide rib (205). The cross section of the air groove (206) is dovetail shaped, and the width of the air groove (206) gradually increases from the bottom of the groove to the opening.
6. The low-temperature resistant and icing-resistant reinforced overhead cable for complex climatic environments according to claim 1, characterized in that, The honeycomb pad (209) has a honeycomb structure inside. The guide nozzle (212) is connected to the outer side of the honeycomb pad (209). The arc groove (216) is connected to the slot (211). The honeycomb pad (209) is made of aramid paper, and the telescopic pad (210) is made of rubber.
7. A low-temperature resistant and icing-resistant reinforced overhead cable for complex climatic environments according to claim 1, characterized in that, An internal reinforcement mechanism (30) is installed on the inner side of the sheath (1). The internal reinforcement mechanism (30) includes a constraint ring (301); The inner wall of the lock sleeve (213) is evenly and equidistantly equipped with several constraint rings (301). Support rings (302) are installed on both sides of the constraint rings (301). Several side ribs (303) are installed at equal angles along the circumferential direction on both sides of the end face of the constraint rings (301). Several protruding ribs (305) are installed at equal angles along the circumferential direction on the inner wall of the lock sleeve (213). Grooves (304) are provided at the corresponding positions of the protruding ribs (305) on the outer curved surfaces of the constraint rings (301), support rings (302) and side ribs (303). Guide holes (306) are opened on the end faces of several protruding ribs (305). Reinforcing ribs (307) are inserted inside the guide holes (306). The outer curved surface of the honeycomb pad (209) is evenly provided with several grooves (308). The inner wall of the telescopic pad (210) is equipped with a hoop (309) at the position corresponding to the groove (308). A guide ring (310) is installed in the middle of the side end face of the honeycomb pad (209). A cable (311) is inserted inside the guide ring (310). A pad (312) is installed inside the sheath (1) at both ends of the honeycomb pad (209). A center nut (313) is rotatably installed in the middle of the side end face of the pad (312). Threaded heads (314) are installed at both ends of the cable (311). A ring frame (315) is rotatably installed on the outer curved surface of the pad (312). Several side nuts (316) are rotatably installed on the side end face of the ring frame (315) along the circumferential direction at equal angles. A screw (317) is connected to both ends of the reinforcing rib (307).
8. A low-temperature resistant and icing-resistant reinforced overhead cable for complex climatic environments according to claim 7, characterized in that, The constraint ring (301) and the support ring (302) are arranged alternately along the cable axis, and the constraint ring (301) and its surface groove (304) and the support ring (302) and its surface groove (304) all form a wave-shaped cross section. The constraint ring (301) is a rigid ring and the support ring (302) is an elastic ring.
9. A low-temperature resistant and icing-resistant reinforced overhead cable for complex climatic environments according to claim 7, characterized in that, The two ends of the side rib (303) are connected to the constraint ring (301) and the support ring (302) respectively. The convex rib (305) fits into the groove (304), and the ring groove (308) fits into the hoop (309).
10. A low-temperature resistant and icing-resistant reinforced overhead cable for complex climatic environments according to claim 7, characterized in that, The reinforcing rib (307) is connected to the side nut (316) via the lead screw (317), and the cable (311) is connected to the center nut (313) via the threaded head (314).