Leakage-proof insulating composite overhead conductor

Abstract

This invention discloses a leakage-proof insulated composite overhead conductor, relating to the field of power cable technology. It includes an outer sheath, inside which a conductor is installed. Both ends of the outer sheath are fitted with end caps. A rotating seat is embedded in the edge of one end face of each end cap. A wire sleeve is threaded onto the inner side of the rotating seat. Several retaining rings are evenly spaced on the inner wall of the wire sleeve, and several retaining pads are evenly spaced on the outer wall of the wire sleeve. In practical use, this invention enhances the protection at both ends while forming a bidirectional, all-around axial and radial protective layer. This effectively prevents moisture intrusion, inhibits the formation of water trees, and forms a coupled lightning protection structure, achieving a protection mechanism primarily based on conduction. It can also assist in diverting lightning current, reducing induced overvoltage, and lowering the probability of lightning strikes causing wire breakage. Simultaneously, it forms a stress dispersion mechanism, effectively preventing the conductor's insulation from being affected by external force damage.

Description

Technical Field

[0001] This invention relates to the field of power cable technology, specifically to a leakage-proof insulated composite overhead conductor. Background Technology

[0002] Overhead conductors are an important component of power transmission. Although traditional bare conductors are low in cost, they face serious risks of leakage, short circuits and electric shock in complex environments. In recent years, overhead insulated conductors have significantly improved daily operation safety due to their insulation layer. However, cable leakage is fundamentally caused by the decline in insulation performance until it breaks down. There is a need to provide a systematic anti-leakage overhead conductor structure that integrates internal electric field homogenization, external environmental isolation, physical damage resistance and controllable discharge of lightning current. However, current overhead conductors lack effective end reinforcement structures, and the ends are the main channels for moisture intrusion. Moisture easily intrudes through the ends and forms water trees under the action of the electric field, continuously damaging the insulation strength. Furthermore, they lack corresponding stress protection mechanisms, and the conductor surface is easily damaged by stress, allowing moisture to intrude. In addition, the insulation layer hinders the normal sliding of the electric arc on the conductor surface, further making the conductor prone to breakdown at weak points in thunderstorm environments, causing leakage, short circuits, or even wire breaks. Summary of the Invention

[0003] This invention provides a leakage-proof insulated composite overhead conductor, which effectively solves the problem mentioned in the background art that current overhead conductors lack effective end reinforcement protection structures. The ends are the main channels for moisture intrusion, and moisture easily intrudes through the ends, forming water trees under the action of the electric field, continuously damaging the insulation strength. Furthermore, it lacks corresponding stress protection mechanisms, and the conductor surface is easily damaged by stress, allowing moisture intrusion. In addition, the insulation layer hinders the normal sliding of the electric arc on the conductor surface, further making the conductor prone to breakdown at weak points in thunderstorm environments, causing leakage, short circuits, or even wire breaks.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a leakage-proof insulated composite overhead conductor, comprising an outer sheath, wherein a wire core is installed inside the outer sheath, and a double-end reinforcing mechanism is installed on the outside of the wire core; The double-ended reinforcing mechanism includes a head; Both ends of the outer sheath are equipped with end caps. A rotating seat is embedded and rotatably installed on one side of the end cap. A wire sleeve is installed on the inner side of the rotating seat by thread. Several retaining rings are evenly arranged at equal intervals on the inner wall of the wire sleeve. Several retaining pads are evenly arranged at equal intervals on the outer wall of the wire sleeve. A sleeve pad is sleeved on the outer side of the wire core. Several grooves are evenly opened at equal intervals on the outer wall of the sleeve pad. The inner side of the outer sheath is fitted with a ring sleeve, and the inner wall of the ring sleeve is provided with a number of inner grooves at equal intervals and evenly distributed. The outer wall of the ring sleeve is provided with a number of outer grooves at equal intervals and evenly distributed. A sleeve is installed at the other end of the end cap, and the inner wall of the sleeve is provided with a number of limiting rings at equal intervals and evenly distributed. A sealing gasket is embedded at the end of the sleeve.

[0005] Preferably, a threaded ring is threadedly installed on the outer side of the sleeve, a rotating ring is rotatably installed at one end of the threaded ring, a spring is connected to one side of the rotating ring, a connecting ring is connected to the end of the spring, a plurality of guide rods are installed at equal angles along the circumferential direction on the outer curved surface of the connecting ring, and a guide ring is connected to the end of the guide rods. A plurality of rib rings are uniformly and evenly sleeved on the outer side of the outer sheath, and a plurality of guide bars are inserted at equal angles along the circumferential direction on the side end face of the rib rings.

[0006] Preferably, a guide valve is installed on one side of both the end cap and the sleeve. The end cap and the sleeve are integrally formed. The internal spaces of the limiting ring and the sealing gasket are connected to the sleeve clamping cavity. The guide valve on the end cap is connected to the sleeve clamping cavity. The inner and outer grooves are aligned with the ring groove. The gasket and the limiting ring are aligned with the retaining ring.

[0007] Preferably, the sleeve, retaining ring, and retaining pad are integrally formed, the internal spaces of the retaining ring and retaining pad are connected to the sleeve clamping cavity, and the guide valve on the sleeve is connected to the sleeve clamping cavity. The retaining ring, retaining pad, limiting ring, and sealing gasket are all annular bladder structures.

[0008] Preferably, an insulating sleeve is fitted on the outer side of the wire core at the position inside the sleeve pad, the insulating sleeve is filled with water-blocking sand, a shielding mesh is embedded in the outer wall of the insulating sleeve, and the insulating sleeve, shielding mesh and sleeve pad are formed by three-layer co-extrusion technology in one extrusion.

[0009] Preferably, the rib ring is slidably connected to the outer sheath, the rib ring is fixedly connected to the guide bar, and the end of the guide bar is fixedly connected to the connecting ring. The guide ring is slidably connected to the end cap, and the connecting ring, guide rod, guide ring, rib ring, and guide bar are all copper-clad steel.

[0010] Preferably, a wire reinforcement mechanism is installed on the inner side of the ring sleeve; The line reinforcement mechanism includes an inner sheath; An inner sheath is fitted onto the outer side of the sleeve at the position inside the ring sleeve. Several convex ribs are evenly installed on the inner wall of the inner sheath at equal intervals. A ring skeleton is fitted onto the outer wall of the inner sheath. An interlocking sleeve is fitted onto the outer side of the ring skeleton. A connecting pad is provided on the inner wall of the interlocking sleeve at the position corresponding to the gap of the ring skeleton. Several inner spiral strips are wound around the outer wall of the interlocking sleeve at equal angles along the circumferential direction. A base sleeve is covered on the outer side of the inner spiral strips. Several outer spiral strips are wound around the outer wall of the base sleeve at equal angles along the circumferential direction. The inner wall of the base sleeve is provided with inner spiral fins at the positions corresponding to the gaps between the inner spiral bars, and the outer wall of the base sleeve is provided with outer spiral fins at the positions corresponding to the gaps between the outer spiral bars. Both the inner and outer spiral bars have guide grooves inside. The outer spiral bar is covered with a covering sleeve. Several base rings are evenly installed at equal intervals on the outer wall of the covering sleeve. Several corrugated sheets are installed at equal angles along the circumferential direction on the outer side of the base rings. A retaining strip is provided on the outer wall of the base rings at the positions corresponding to the gaps between the corrugated sheets. The inside of the ring sleeve is filled with microcapsules.

[0011] Preferably, the convex rib ring fits into the ring groove, the inner sheath fits into the sleeve gasket, the inner sheath is connected to the interlocking sleeve through a connecting gasket, and the ring skeleton is in the form of annular mesh.

[0012] Preferably, both the inner and outer spiral bars are spiral-shaped, and their rotation directions are opposite. The base sleeve is connected to the interlocking sleeve via the inner spiral fins, and the base sleeve is connected to the covering sleeve via the outer spiral fins.

[0013] Preferably, the corrugated sheet is wavy, and the corrugated sheet and the covering sleeve are evenly spaced to form several annular grooves. The base ring is located inside the annular sleeve and is distributed adjacent to the inner groove. The microcapsule wall material is melamine-formaldehyde resin, and the microcapsule core material is paraffin wax.

[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 a double-end reinforcement mechanism, the end cap, rotating seat, wire sleeve, retaining ring, retaining pad, sleeve pad, and ring groove work together to form an inner waterproof structure at the end of the wire core. This achieves double sealing of the inner side of the wire core end, and with the filling effect of water-blocking sand, it prevents water vapor from entering from the inner side of the wire core joint. At the same time, it can limit and fix the end cap on the inner side. With the limiting and locking action of the ring sleeve, inner retaining groove, outer retaining groove, sleeve, and limiting ring, it can achieve double sealing and external fixation of the outer side of the outer sheath end. This forms a multi-layer sealing mechanism and a bidirectional limiting mechanism. It can not only be used with the pilot valve to achieve rapid assembly of the conductor, but also can be equipped with a sealing gasket to achieve all-round enveloping bidirectional protection from longitudinal water blocking to radial water blocking. It can block water vapor in all directions in the outer sheath, preventing water vapor from forming water trees under the action of electric field after water vapor intrusion, which would affect the insulation. It can prevent the formation of weak points in the insulation, significantly improve the overvoltage breakdown strength, and improve the resistance to atmospheric overvoltage generated by lightning. By cooperating with connecting rings, guide rods, guide rings, rib rings, and guide bars, it can be connected to an external grounding structure to form a coupled lightning protection structure. This structure assists in intercepting direct lightning strikes, diverting lightning current, reducing induced overvoltage, and preventing the outer sheath and its inner structures from being broken down or burned under atmospheric overvoltage generated by lightning. This reduces the probability of lightning-induced wire breakage. It can also cooperate with threaded rings, swivel rings, and springs to adjust the tension of the guide bars, share the tension on the outer sheath, and keep the outer sheath and its inner structures in a relatively relaxed state. This allows the outer sheath and its inner structures to more stably and reliably cope with external stress disturbances, preventing them from being damaged under external force disturbances and affecting insulation. At the same time, during the use of the conductor, the springs can be used to relieve and buffer the tensile force on the guide bars, and can also provide auxiliary limiting tensile force to the end caps, making them more stable.

[0015] 2. Equipped with a wire reinforcement mechanism, the inner sheath and convex rib ring work together to form an internal limiting and protective structure, which improves the stability of the wire core and expands the effective heat transfer surface. It can also work with the ring skeleton, interlocking sleeve and connecting pad to form a grid-like reinforcement structure. This not only forms a continuous low thermal resistance channel between the interlocking sleeve and the wire core, allowing the heat generated by the wire core to diffuse rapidly outward along the axial direction, improving the axial heat transfer rate of the conductor and the timeliness and reliability of heat transfer, making the conductor work more smoothly, but also forms a grid-like stress relief buffer mechanism when the conductor is stretched, realizing internal stress relief. It can take into account both rigid stability and elastic stress relief, and can disperse and transfer the force radially, avoiding stress concentration and balancing the internal stress of the conductor. By combining interlocking sleeves, base sleeves, and covering sleeves, a layered stress relief structure can be formed. With the reverse conduction effect of inner and outer spiral bars and the bidirectional limiting effect of inner and outer spiral fins, a bidirectional anti-spiral distribution mechanism can be formed. This not only allows the external tensile force to be transmitted around the conductor core in a circumferential spiral in the reverse direction, further dispersing the external tensile force, but also generates a reverse force to quickly consume the external tensile force. It can also be combined with a flow guide groove to form a bidirectional anti-spiral heat exchange channel around the conductor core for auxiliary heat exchange, and simultaneously improve the heat exchange uniformity of the conductor in the axial and radial directions. In addition, the limiting and supporting effect of the base ring, retaining strips, corrugated sheets, and annular grooves not only provides a more stable stress relief buffer space for the conductor and achieves directional stress relief, but also enhances the conductor's resistance to external pressure deformation with the internal support of the base ring and the external limiting effect of the rib ring.

[0016] In summary, during practical use, this conductor, while enhancing the protection at both ends, can form a bidirectional, all-around protective shield in both the axial and radial directions. This effectively prevents moisture intrusion, inhibits the formation of water trees, and forms a coupled lightning protection structure, achieving a protection mechanism primarily based on conduction. It can also assist in diverting lightning current, reducing induced overvoltage, and lowering the probability of lightning strikes causing wire breakage. Simultaneously, it can form a stress dispersion mechanism, effectively preventing the conductor from being damaged by external forces and affecting its insulation. The conductor's heat dissipation performance is also reliably improved, preventing insulation thermal aging and having a significant effect on inhibiting water tree growth. 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 rib ring mounting structure of the present invention; Figure 3 This is a schematic diagram of the ring mounting structure of the present invention; Figure 4 This is a schematic diagram of the wire core mounting structure of the present invention; Figure 5 This is a schematic diagram of the double-end reinforcing mechanism of the present invention; Figure 6 This is a schematic diagram of the spring mounting structure of the present invention; Figure 7 This is a schematic diagram of the threaded ring mounting structure of the present invention; Figure 8 This is a schematic diagram of the inner sheath installation structure of the present invention; Figure 9 This is a schematic diagram of the line reinforcement mechanism structure of the present invention; Figure 10 This is a schematic diagram of the internal spiral fin arrangement of the present invention; The diagram is labeled as follows: 1. Outer sheath; 11. Wire core; 12. Insulating sleeve; 13. Water-blocking sand; 14. Shielding mesh; 20. Double-ended reinforcing mechanism; 201. End cap; 202. Rotary seat; 203. Wire sleeve; 204. Snap ring; 205. Snap gasket; 206. Sleeve gasket; 207. Ring groove; 208. Ring sleeve; 209. Inner snap groove; 210. Outer snap groove; 211. Sleeve; 212. Limiting ring; 213. Sealing gasket; 214. Pilot valve; 215. Threaded ring; 216. Rotary ring; 217. Spring; 218. Connecting ring; 219. Guide rod; 220. Guide ring; 221. Rib ring; 222. Guide bar; 30. Line reinforcement mechanism; 301. Inner sheath; 302. Raised rib ring; 303. Ring skeleton; 304. Interlocking sleeve; 305. Connecting pad; 306. Inner spiral bar; 307. Base sleeve; 308. Outer spiral bar; 309. Inner spiral fin; 310. Outer spiral fin; 311. Guide groove; 312. Covering sleeve; 313. Base ring; 314. Locking strip; 315. Corrugated sheet; 316. Annular groove; 317. Microcapsule. 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, a leakage-proof insulated composite overhead conductor, including an outer sheath 1, a wire core 11 installed inside the outer sheath 1, and a double-end reinforcing mechanism 20 installed outside the wire core 11. The double-ended reinforcing mechanism 20 includes a head 201; Both ends of the outer sheath 1 are equipped with end caps 201. A rotating seat 202 is embedded and rotatably installed on one side of the end face of the end cap 201. A wire sleeve 203 is installed inside the rotating seat 202 by thread. Several retaining rings 204 are evenly spaced on the inner wall of the wire sleeve 203. Several retaining pads 205 are evenly spaced on the outer wall of the wire sleeve 203. A sleeve pad 206 is sleeved on the outside of the wire core 11. Several grooves 207 are evenly spaced on the outer wall of the sleeve pad 206. The inner side of the outer sheath 1 is fitted with a ring 208. The inner wall of the ring 208 is evenly provided with several inner grooves 209 at equal intervals, and the outer wall of the ring 208 is evenly provided with several outer grooves 210 at equal intervals. The other end of the end cap 201 is fitted with a sleeve 211. The inner wall of the sleeve 211 is evenly provided with several limiting rings 212 at equal intervals. A sealing gasket 213 is embedded in the end of the sleeve 211. The wire sleeve 203, the retaining ring 204 and the retaining gasket 205 are integrally formed. The internal spaces of the retaining ring 204 and the retaining gasket 205 are connected to the cavity of the wire sleeve 203. The guide valve 214 on the wire sleeve 203 is connected to the cavity of the wire sleeve 203. The retaining ring 204, the retaining gasket 205, the limiting ring 212 and the sealing gasket 213 are all annular bladder structures for sealing and protection. Both the end cap 201 and the sleeve 203 are equipped with a pilot valve 214 on one side. The end cap 201 and the sleeve 211 are integrally formed. The internal spaces of the limiting ring 212 and the sealing gasket 213 are connected to the clamping cavity of the sleeve 211. The pilot valve 214 on the end cap 201 is connected to the clamping cavity of the sleeve 211. The inner groove 209 and the outer groove 210 are aligned with the ring groove 207. The gasket 205 and the limiting ring 212 are aligned with the retaining ring 204 for assembly.

[0021] A threaded ring 215 is threadedly installed on the outside of the sleeve 211. A rotating ring 216 is rotatably installed on one end of the threaded ring 215. A spring 217 is connected to one side of the rotating ring 216. A connecting ring 218 is connected to the end of the spring 217. Several guide rods 219 are installed at equal angles along the circumferential direction on the outer curved surface of the connecting ring 218. A guide ring 220 is connected to the end of the guide rod 219. The outer sheath 1 is uniformly fitted with several rib rings 221 at equal intervals on its outer side. Several guide bars 222 are inserted at equal angles along the circumferential direction on the side end face of the rib rings 221. The rib rings 221 are slidably connected to the outer sheath 1, and the rib rings 221 are fixedly connected to the guide bars 222. The ends of the guide bars 222 are fixedly connected to the connecting rings 218. The guide rings 220 are slidably connected to the end caps 201. The connecting rings 218, guide rods 219, guide rings 220, rib rings 221 and guide bars 222 are all made of copper-clad steel to provide auxiliary lightning protection.

[0022] An insulating sleeve 12 is fitted on the outside of the wire core 11 at the position inside the sleeve 206. The insulating sleeve 12 is filled with water-blocking sand 13. A shielding mesh 14 is embedded in the outer wall of the insulating sleeve 12. The insulating sleeve 12, the shielding mesh 14 and the sleeve 206 are extruded in one step using a three-layer co-extrusion technology to improve the insulation and shielding effect. A wire reinforcement mechanism 30 is installed inside the ring 208; The line reinforcement mechanism 30 includes an inner sheath 301; An inner sleeve 301 is fitted onto the outer side of the pad 206 at the position inside the ring 208. Several convex ribs 302 are evenly installed on the inner wall of the inner sleeve 301 at equal intervals. A ring skeleton 303 is fitted onto the outer wall of the inner sleeve 301. An interlocking sleeve 304 is fitted onto the outer side of the ring skeleton 303. A connecting pad 305 is provided on the inner wall of the interlocking sleeve 304 at the position corresponding to the gap of the ring skeleton 303. The convex ribs 302 fit into the ring groove 207. The inner sleeve 301 fits into the pad 206. The inner sleeve 301 is connected to the interlocking sleeve 304 through the connecting pad 305. The ring skeleton 303 is in the shape of a ring mesh to balance internal stress and assist in heat dissipation. The outer wall of the interlock sleeve 304 is wound with several inner spiral strips 306 at equal angles along the circumferential direction. The outer side of the inner spiral strips 306 is covered by a base sleeve 307. The outer wall of the base sleeve 307 is wound with several outer spiral strips 308 at equal angles along the circumferential direction. An inner spiral fin 309 is provided on the inner wall of the base sleeve 307 at the gap position corresponding to the inner spiral bar 306, and an outer spiral fin 310 is provided on the outer wall of the base sleeve 307 at the gap position corresponding to the outer spiral bar 308. A guide groove 311 is provided inside both the inner spiral bar 306 and the outer spiral bar 308. A covering sleeve 312 covers the outer side of the outer spiral bar 308. Both the inner spiral bar 306 and the outer spiral bar 308 are spiral in shape, and the rotation directions of the inner spiral bar 306 and the outer spiral bar 308 are opposite. The base sleeve 307 is connected to the interlocking sleeve 304 through the inner spiral fin 309, and the base sleeve 307 is connected to the covering sleeve 312 through the outer spiral fin 310, so as to disperse stress and enhance protection. A number of base rings 313 are evenly and equidistantly installed on the outer wall of the cover sleeve 312. A number of corrugated sheets 315 are installed at equal angles along the circumferential direction on the outer side of the base rings 313. A retaining strip 314 is provided on the outer wall of the base rings 313 at the gap position of the corrugated sheets 315. The inside of the ring sleeve 208 is filled with microcapsules 317. The corrugated sheets 315 are wavy and are evenly and equidistantly enclosed with the cover sleeve 312 to form a number of annular grooves 316. The base rings 313 are located inside the ring sleeve 208 and are adjacent to the inner retaining grooves 209. The wall material of the microcapsules 317 is melamine-formaldehyde resin and the core material of the microcapsules 317 is paraffin wax to enhance the resistance to external pressure deformation and further balance heat exchange.

[0023] The working principle and usage process of this invention: During the production process, the internal structure and external structure of the outer sheath 1 of this anti-leakage insulated composite overhead conductor can be processed separately and independently. After processing, they are assembled in a unified modular manner. In actual use, the appropriate specifications of the cable can be selected according to the actual usage requirements to complete the cable laying work. After the cable is laid to the appropriate height and the corresponding wiring connection work is completed, it can be put into use. During the unified modular assembly of the external structure of the outer sheath 1, each rib ring 221 is first sequentially sleeved on the outside of the outer sheath 1. Then, the wire core 11 is aligned with the end cap 201, inserted into the end cap 201, and passed out from the inside of the wire sleeve 203. The sleeve 211 is clamped on the outside of the ring sleeve 208, the end cap 201 is pressed tightly, so that the end cap 201 and the ring sleeve 208 are tightly attached. The limiting ring 212 is inserted into the outer groove 210, and the sealing gasket 213 is clamped on the outside of the outer sheath 1. Correspondingly, since the inner groove 209 and the outer groove 210 are aligned with the ring groove 207, and the pad 205 and the limiting ring 212 are aligned with the ring 204, when the limiting ring 212 is engaged in the outer groove 210, the pad 205 will be engaged in the inner groove 209 at the same time, and the ring 204 will be engaged in the ring groove 207 at the same time. At this time, non-Newtonian fluid can be injected into the pilot valve 214 on the sleeve 203 and the end cap 201 respectively. The non-Newtonian fluid injected into the guide valve 214 on the sleeve 203 enters the clamping cavity of the sleeve 203 and is then simultaneously injected into the retaining ring 204 and the retaining pad 205, giving the sleeve 203 a stable internal support force, and causing the retaining ring 204 to expand further under the pressure of the non-Newtonian fluid in the retaining pad 205, so that the retaining ring 204 fills the internal gap of the ring groove 207 more closely, and the retaining pad 205 is more stably inserted into the gap of the inner retaining groove 209, and the adhesion between the retaining pad 205 and the inner retaining groove 209 and between the retaining ring 204 and the ring groove 207 is enhanced. While fixing the end cap 201 on the inside, the double sealing and limiting of the inner side of the end of the wire core 11 is completed. The non-Newtonian fluid injected into the pilot valve 214 on the end cap 201 will enter the inner cavity of the sleeve 211, providing auxiliary support to the sleeve 211 and enhancing its pressure resistance. At the same time, the non-Newtonian fluid will be injected into the limiting ring 212 and the sealing gasket 213. The limiting ring 212 will be stably inserted into the outer groove 210 and expand under the pressure of the non-Newtonian fluid, filling the gap between it and the outer groove 210. Combined with the locking action between the gasket 205 and the inner groove 209, the ring sleeve 208 and the end cap 201 will be more stably connected. At the same time, the sealing gasket 213 will also expand under the pressure of the non-Newtonian fluid, gripping the outer sheath 1 with greater force, completing the double sealing and limiting of the outer side of the end of the outer core 11. Furthermore, during subsequent use of the conductor, it can not only achieve multiple sealing between the conductor 11 and the outer sheath 1 at the end of the conductor 11, thus achieving radial water blocking of the cable and preventing water vapor from entering the conductor through the joint, but also, with the longitudinal protection of the ring 208, achieve all-round enveloping bidirectional protection from longitudinal water blocking to radial water blocking. With the protection mechanism of water-blocking sand 13, it can prevent water vapor from entering along the gap of the conductor 11, and can block water vapor in all directions in the outer sheath 1, preventing water vapor from forming water trees under the action of electric field after entering, which would affect the insulation. Using the above method, end caps 201 can be sequentially fitted onto both ends of the outer sheath 1 to achieve double-end sealing. Then, guide ring 220 can be aligned with sleeve 211 and fitted onto the outside of end cap 201 along sleeve 211. Rotate threaded ring 215 to connect threaded ring 215 to sleeve 211 through threads, while moving it along sleeve 211. At the same time, spring 217 is pulled by rotating ring 216, causing spring 217 to drag connecting ring 218 to move synchronously. Connecting ring 218 will then pull guide bar 222 synchronously, causing guide bar 222 to gradually straighten. By rotating the threaded ring 215, the tension force on the spring 217 can be adjusted, and the tension of the guide bar 222 can be adjusted simultaneously. Furthermore, after the conductor is erected, the guide bar 222 can be used to share the tension force on the outer sheath 1, adjust the state of the outer sheath 1, and make the outer sheath 1 and its inner structure relatively relaxed, so that it can cope with external disturbances more easily. In subsequent use, the guide bar 222 will be subjected to external pulling impact force before the outer sheath 1, and share most of the pulling force, which can improve the resistance of the outer sheath 1 and its inner structure to disturbance during wind swing, and prevent it from being damaged under external disturbances, thus affecting the insulation. This can prevent the formation of weak points in the insulation, significantly improve the overvoltage breakdown strength, and enhance the resistance to atmospheric overvoltages generated by lightning. At the same time, since the connecting ring 218, the conductor rod 219, the conductor ring 220, the rib ring 221, and the conductor bar 222 are all copper-clad steel conductive structures, they can be connected to the external grounding structure during the erection of the conductor to form a coupled lightning protection structure, which can help intercept direct lightning strikes, divert lightning current, reduce induced overvoltages, and prevent the outer sheath 1 and its inner structure from being broken down and burned under atmospheric overvoltages generated by lightning, thereby reducing the probability of lightning-induced wire breakage. In addition, since the threaded ring 215 is fixedly connected to the sleeve 211, the pulling force of the guide bar 222 will act synchronously on the spring 217. During the use of the wire, while the spring 217 helps to relieve and buffer the pulling force on the guide bar 222, it can also provide auxiliary limiting pulling force to the end cap 201. Furthermore, the rotating seat 202 can be rotated to drive the wire sleeve 203 to move, so that the wire sleeve 203 tightens the sleeve pad 206 and the ring 208, making the outer sheath 1 and the end cap 201 more stable, and simultaneously enhancing the stability between the internal structures of the outer sheath 1. Similarly, during the use of the conductor, under the limiting effect of the convex rib ring 302 and the ring groove 207, the inner sheath 301 will hold the sleeve pad 206 tightly. In addition, the grid-like reinforcing structure of the ring skeleton 303 can not only form a continuous low thermal resistance channel between the interlocking sleeve 304 and the conductor 11, allowing the heat generated by the conductor 11 to diffuse outward rapidly along the axial direction, but also when the conductor is stretched, the ring skeleton 303 will deform and shrink accordingly. With the limiting effect of the retaining pad 205, it can take into account both rigid stability and elastic force release, and hold the inner conductor 11 more stably. At the same time, it can disperse and transmit the force radially to avoid stress concentration. Meanwhile, the bidirectional anti-spiral structure formed by the outer spiral bar 308 and the inner spiral bar 306, when the conductor is pulled by external force, can be combined with the elastic limiting effect of the inner spiral fin 309 and the outer spiral fin 310 to transmit the external pulling force around the conductor core 11 in the reverse direction along the circumferential spiral, further dispersing the external pulling force. At the same time, it can form a reverse force at the base sleeve 307 to quickly consume the external pulling force. It can also be combined with the flow guide groove 311 to form a bidirectional anti-spiral heat exchange channel around the conductor core 11 for auxiliary heat exchange, and simultaneously improve the heat exchange uniformity of the conductor in the axial and radial directions. In addition, the limiting and supporting functions of the base ring 313, the retaining strip 314 and the corrugated sheet 315, on the one hand, when the conductor is subjected to external compression and stretching, the corrugated sheet 315 will deform accordingly, further offsetting and dispersing the force. Combined with the internal supporting function of the base ring 313 and the external limiting function of the rib ring 221, the conductor's ability to resist external pressure deformation is improved. Moreover, it can cooperate with the annular groove 316 to form multiple annular heat exchange channels in the radial direction of the conductor, further promoting the rapid dissipation of heat generated by the core 11. In addition, the microcapsules 317 inside the ring 208 can absorb heat through solid-liquid phase change when the load increases, suppressing the sudden rise in the surface temperature of the conductor. When the load decreases, the PCM re-solidifies and releases heat, which plays a role in thermal buffering, preventing insulation thermal aging and having a significant effect on inhibiting water tree growth.

[0024] 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. An electrically leakproof insulated composite overhead conductor comprising an outer sheath (1) characterized in that: The outer sheath (1) has a wire core (11) installed inside, and a double-end reinforcing mechanism (20) is installed on the outside of the wire core (11). The double-ended reinforcing mechanism (20) includes a head (201); Both ends of the outer sheath (1) are equipped with end caps (201). A rotating seat (202) is embedded and rotatably installed on one side of the end face of the end cap (201). A wire sleeve (203) is installed on the inner side of the rotating seat (202) by thread. A number of retaining rings (204) are evenly arranged on the inner wall of the wire sleeve (203). A number of retaining pads (205) are evenly arranged on the outer wall of the wire sleeve (203). A sleeve pad (206) is sleeved on the outer side of the wire core (11). A number of grooves (207) are evenly opened on the outer wall of the sleeve pad (206). The inner side of the outer sheath (1) is fitted with a ring sleeve (208). The inner wall of the ring sleeve (208) is provided with a number of inner grooves (209) at equal intervals. The outer wall of the ring sleeve (208) is provided with a number of outer grooves (210) at equal intervals. The other end of the end cap (201) is fitted with a sleeve (211). The inner wall of the sleeve (211) is provided with a number of limiting rings (212) at equal intervals. The end of the sleeve (211) is fitted with a sealing gasket (213).

2. The leakage-proof insulated composite overhead conductor according to claim 1, characterized in that, A threaded ring (215) is threadedly installed on the outside of the sleeve (211). A rotating ring (216) is rotatably installed on one end of the threaded ring (215). A spring (217) is connected to one side of the rotating ring (216). A connecting ring (218) is connected to the end of the spring (217). Several guide rods (219) are installed at equal angles along the circumferential direction on the outer curved surface of the connecting ring (218). A guide ring (220) is connected to the end of the guide rod (219). Several rib rings (221) are evenly and equidistantly sleeved on the outside of the outer sheath (1). Several guide bars (222) are inserted at equal angles along the circumferential direction on the side end face of the rib ring (221).

3. The leakage-proof insulated composite overhead conductor according to claim 1, characterized in that, A pilot valve (214) is installed on one side of the end of the end cap (201) and the sleeve (203). The end cap (201) and the sleeve (211) are integrally formed. The internal space of the limiting ring (212) and the sealing gasket (213) are connected to the cavity of the sleeve (211). The pilot valve (214) on the end cap (201) is connected to the cavity of the sleeve (211). The inner groove (209) and the outer groove (210) are aligned with the ring groove (207). The gasket (205) and the limiting ring (212) are aligned with the retaining ring (204).

4. The leakage-proof insulated composite overhead conductor according to claim 3, characterized in that, The sleeve (203), retaining ring (204) and retaining pad (205) are integrally formed. The internal spaces of the retaining ring (204) and retaining pad (205) are connected to the cavity of the sleeve (203). The guide valve (214) on the sleeve (203) is connected to the cavity of the sleeve (203). The retaining ring (204), retaining pad (205), limiting ring (212) and sealing gasket (213) are all annular bladder structures.

5. The leakage-proof insulated composite overhead conductor according to claim 1, characterized in that, An insulating sleeve (12) is fitted on the outside of the core (11) at the position inside the sleeve (206). The insulating sleeve (12) is filled with water-blocking sand (13). A shielding mesh (14) is embedded in the outer wall of the insulating sleeve (12). The insulating sleeve (12), the shielding mesh (14) and the sleeve (206) are formed by three-layer co-extrusion technology in one extrusion.

6. The leakage-proof insulated composite overhead conductor according to claim 2, characterized in that, The rib ring (221) is slidably connected to the outer sheath (1), the rib ring (221) is fixedly connected to the guide bar (222), and the end of the guide bar (222) is fixedly connected to the connecting ring (218). The guide ring (220) is slidably connected to the end cap (201), and the connecting ring (218), guide rod (219), guide ring (220), rib ring (221) and guide bar (222) are all copper-clad steel.

7. The leakage-proof insulated composite overhead conductor according to claim 1, characterized in that, A wire reinforcement mechanism (30) is installed inside the ring (208); The line reinforcement mechanism (30) includes an inner sheath (301); An inner sleeve (301) is fitted onto the outer side of the sleeve (206) at the position inside the ring sleeve (208). Several convex rib rings (302) are evenly installed on the inner wall of the inner sleeve (301). A ring skeleton (303) is fitted onto the outer wall of the inner sleeve (301). An interlocking sleeve (304) is fitted onto the outer side of the ring skeleton (303). A connecting pad (305) is provided on the inner wall of the interlocking sleeve (304) at the gap position corresponding to the ring skeleton (303). Several inner spiral strips (306) are wound around the outer wall of the interlocking sleeve (304) at equal angles along the circumferential direction. A base sleeve (307) is covered on the outer side of the inner spiral strips (306). Several outer spiral strips (308) are wound around the outer wall of the base sleeve (307) at equal angles along the circumferential direction. The inner wall of the base sleeve (307) is provided with an inner spiral fin (309) at the gap position of the inner spiral bar (306), and the outer wall of the base sleeve (307) is provided with an outer spiral fin (310) at the gap position of the outer spiral bar (308). The inner spiral bar (306) and the outer spiral bar (308) are both provided with a guide groove (311). The outer spiral bar (308) is covered with a covering sleeve (312). Several base rings (313) are evenly installed on the outer wall of the covering sleeve (312). Several corrugated sheets (315) are installed at equal angles along the circumferential direction on the outer side of the base rings (313). A retaining strip (314) is provided on the outer wall of the base rings (313) at the gap position of the corrugated sheets (315). The ring sleeve (208) is filled with microcapsules (317).

8. The leakage-proof insulated composite overhead conductor according to claim 7, characterized in that, The convex rib ring (302) fits into the ring groove (207), the inner sheath (301) fits into the sleeve gasket (206), the inner sheath (301) is connected to the interlocking sleeve (304) through the connecting gasket (305), and the ring skeleton (303) is in the shape of a ring mesh.

9. The leakage-proof insulated composite overhead conductor according to claim 7, characterized in that, The inner spiral bar (306) and the outer spiral bar (308) are both spiral in shape, and the inner spiral bar (306) and the outer spiral bar (308) rotate in opposite directions. The base sleeve (307) is connected to the interlocking sleeve (304) through the inner spiral fin (309), and the base sleeve (307) is connected to the covering sleeve (312) through the outer spiral fin (310).

10. The leakage-proof insulated composite overhead conductor according to claim 7, characterized in that, The corrugated sheet (315) is wavy, and the corrugated sheet (315) and the covering sleeve (312) are evenly and equidistantly enclosed to form several annular grooves (316). The base ring (313) is located inside the annular sleeve (208) and is distributed adjacent to the inner groove (209). The wall material of the microcapsule (317) is melamine-formaldehyde resin, and the core material of the microcapsule (317) is paraffin wax.

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