A weather-resistant insulated overhead cable

Abstract

The invention discloses a weather-resistant insulated overhead cable, which relates to the technical field of cables and comprises a cable mechanism. The cable mechanism is characterized in that: the cable mechanism comprises a conductor, an insulating layer, an inner sheath layer and a steel belt armor; the invention arranges the inner sheath layer and the steel belt armor in layers on the outer side of the conductor; the inner sheath layer adopts chloroprene rubber as a main raw material; the chloroprene rubber has excellent weather resistance, ozone resistance, chemical corrosion resistance and flame retardancy; carbon black can enhance the wear resistance and tear resistance of the inner sheath layer and improve its weather resistance at the same time; an antioxidant can effectively delay the aging speed of the inner sheath layer; a plasticizer improves the flexibility and processing performance of the chloroprene rubber; the inner sheath layer is wrapped outside the shielding layer and further protects the inner insulating layer and the shielding layer; the good weather resistance of the inner sheath layer can resist the erosion of the internal structure by the external environment, and synergizes with the outer insulating layer to enhance the weather resistance of the entire cable.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, in particular to a weather-resistant insulated overhead cable. Background Art

[0002] With the continuous development of the power industry, overhead cables play an important role in power transmission. Overhead cables are exposed to the outdoor environment for a long time and need to withstand various complex climatic conditions, such as ultraviolet radiation, rain and snow erosion, and high and low temperature fluctuations.

[0003] In the prior art, for example, patent publication number CN218038617U discloses a "weather-resistant insulated overhead cable," which includes several conductors, each of which is sheathed with a weather-resistant polyethylene insulation layer. The weather-resistant polyethylene insulation layer is sheathed with several protective mechanisms, including convex blocks, concave blocks, a thermally conductive insulation layer, a heat-insulating layer, a thermal insulation layer, an aging-resistant layer, a wear-resistant layer, a return spring, and a clamping joint. Combined with the thermally conductive insulation layer, the thermal insulation layer, the heat-insulating layer, the aging-resistant layer, and the wear-resistant layer, the overhead cable's resistance to high temperatures, cold weather, aging, and wear is enhanced, while further strengthening its robustness. This improves the cable's weather resistance and ensures long-term use.

[0004] Due to the simple structural design of existing cables, they need to be laid flat on the ground along the installation line before being laid overhead. During the laying and installation process, they are easily crushed by passing people and vehicles. Existing cables are basically distributed in a tightly connected manner. Excessive crushing can easily cause damage to the internal battery conductors, and it is difficult to detect and deal with it in time, thus affecting the subsequent power supply work. To address the above problems, a weather-resistant insulated overhead cable is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a weather-resistant insulated overhead cable to solve the problem that the existing technology proposed in the above background technology needs to be laid flat on the ground along the installation line before overhead laying. During the laying and installation process, it is easy to be crushed by passing people and vehicles. The existing cables basically adopt a tightly connected distribution method. Excessive crushing can easily cause damage to the internal battery core conductors, and it cannot be discovered and dealt with in time, thus affecting the subsequent power supply work.

[0006] To achieve the above object, the present invention provides the following technical solution: a weather-resistant insulated overhead cable, comprising a cable mechanism, characterized in that: the cable mechanism comprises a conductor, an insulation layer, an inner sheath layer and a steel tape armor, the inner sheath layer being used to wrap and support the conductor;

[0007] An outer protective mechanism is arranged on the outside of the cable mechanism, and the outer protective mechanism includes an outer sheath, an elastic support member and an inner support ring body. The outer protective mechanism is used to wrap the outside of the cable mechanism, and the elastic support members are distributed at intervals along the circumferential direction on the outside of the steel belt armor. The inner support ring body penetrates each elastic support member along the circumferential direction, and an outer sheath for wrapping the elastic support member is also arranged on the periphery of each elastic support member.

[0008] Preferably, it also includes an external support mechanism, which includes a mounting ring, a connecting ring is sleeved on the outside of the mounting ring, and a number of support members are evenly distributed circumferentially on the outside of the connecting ring. An inner penetrating block is fixed on the inner side of the support member, and an inner penetrating sleeve passes through the inner penetrating block. A hole is opened on the inner penetrating sleeve, and a steel wire protection strip passes through the hole.

[0009] Preferably, a connecting frame is symmetrically arranged on the inner side of the support member, a movable frame is symmetrically arranged on one side of the connecting frame, a damping rod is arranged in the middle of one side of the connecting frame between adjacent movable frames, a spring member is sleeved on the outer side of the damping rod, and a sliding guide wheel is arranged on the other side of the connecting frame.

[0010] Preferably, telescopic frames are installed on the left and right sides of the support respectively, a connecting seat is connected between two adjacent telescopic frames, elastic sheets are provided on both sides of the support, the elastic sheets are connected to the outer side of the connecting seat, and the other part of the elastic sheet is connected to the outer side of the support.

[0011] Preferably, a plurality of limiting docking parts are fixed on the outer side of the connecting ring, and the limiting fasteners are detachably connected to the limiting docking parts; a plurality of positioning blocks are arranged at intervals on the inner side of the limiting docking parts, and the end surface of the limiting fasteners extends outward to form a fastening seat, and a fastening plate is clamped and connected to the fastening seat.

[0012] Preferably, the inner side of the limiting fastener fixes the inner support block along the length direction, and a plurality of positioning strips are provided on the inner side of the limiting fastener. The positioning strips are staggered relative to each positioning block. When the limiting fastener cooperates with the limiting docking piece, the positioning strips are inserted into the gap between adjacent positioning blocks.

[0013] Preferably, a plurality of side supports are evenly distributed on the outer periphery of the outer sheath and on the front and rear sides of the mounting ring.

[0014] Preferably, one end of the elastic support is connected to a first mounting bar, which is evenly distributed on the inner side of the outer sheath, and the other end of the elastic support is connected to a second mounting bar, which is evenly distributed on the outer wall of the steel belt armor.

[0015] Preferably, a conductor shield is provided on the outside of the conductor, the conductor shield is provided on the inside of the insulating layer, an insulating shielding layer is provided on the outside of the insulating layer, a copper tape shielding layer is provided on the outside of the insulating shielding layer, and a filling layer is provided on the outside of the copper tape shielding layer.

[0016] Preferably, a bagging layer is provided on the outer side of the filling layer, and the bagging layer is provided on the inner side of the inner sheath layer.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) In the present invention, the inner sheath layer and the steel belt armor are layered and arranged on the outside of the conductor. The inner sheath layer uses chloroprene rubber as the main raw material. Neoprene rubber has excellent weather resistance, ozone resistance, chemical corrosion resistance and flame retardancy. Carbon black can enhance the wear resistance and tear resistance of the inner sheath layer, and at the same time improve its weather resistance. The antioxidant can effectively delay the aging speed of the inner sheath layer. The plasticizer improves the flexibility and processing performance of chloroprene rubber. The inner sheath layer is wrapped outside the shielding layer to further protect the inner insulation layer and the shielding layer. Its good weather resistance can resist the erosion of the internal structure by the external environment, and work together with the outer insulation layer to enhance the overall weather resistance of the cable. The high wear resistance and tear resistance can prevent the internal structure of the cable from being damaged due to friction and pulling during installation and use, thereby ensuring the integrity of the cable. Flame retardancy It can improve the fire safety performance of the cable and reduce the risk of fire. The steel belt armor uses galvanized steel belt, which has high strength and hardness and can provide reliable mechanical protection for the cable. The galvanized layer can effectively prevent the steel belt from rusting and improve the corrosion resistance of the steel belt, thereby extending the service life of the steel belt armor and ensuring its long-term and stable function. The steel belt armor significantly enhances the mechanical strength and compressive resistance of the cable. When the cable is subjected to external mechanical force, the steel belt armor can disperse and buffer the external force to protect the internal conductor, insulation layer, shielding layer and other structures from damage. Its higher hardness can also effectively prevent the cable from being pierced by sharp objects, ensuring the normal operation of the cable. At the same time, the corrosion resistance of the galvanized steel belt makes it not easy to rust in complex outdoor environments, maintaining good mechanical protection performance, and further improving the weather resistance and service life of the cable.

[0019] (2) In the present invention, the outer sheath is used as the outermost protective structure of the cable, which mainly plays the role of resisting the external environment in all directions. In terms of material selection, high-density polyethylene with excellent weather resistance is usually used, which can effectively resist ultraviolet radiation, rain and snow erosion, wind and sand wear and corrosion by chemical substances, and prevent the internal structure of the cable from being damaged by external environmental factors, thereby greatly improving the service life of the cable. In addition, the outer sheath also has certain flame retardant properties, which can prevent the spread of fire in the event of a fire and ensure the safety of the power transmission system. At the same time, it can also play a certain insulating role, further enhancing the electrical safety of the cable and avoiding safety hazards such as leakage caused by external factors. The elastic support members in the cable mainly undertake the functions of buffering and supporting. When the cable is subjected to external mechanical forces, such as shaking caused by wind, pulling during installation or maintenance, etc., the elastic support members It can use its own elastic deformation to absorb and disperse external forces, avoiding these external forces from directly acting on key structures such as conductors and insulation layers inside the cable, preventing them from deformation, damage and other problems due to force, thereby protecting the integrity of the cable's internal structure. In complex environments, such as when temperature changes cause the cable to expand and contract, the elasticity of the elastic support can also adapt to this dimensional change, providing flexible support for the cable, ensuring that the various parts of the cable structure are always in a stable state under different working conditions, and maintaining the normal power transmission performance of the cable. The main function of the inner support ring is to maintain the stability of the cable's internal structure and regular shape. During the cable production process, it provides a support framework for internal conductors, insulation layers, shielding layers and other structures, ensuring that each layer of structure remains relatively fixed in position during laying and use, avoiding dislocation or deformation of the internal structure due to factors such as extrusion and bending, thereby ensuring the stability of the cable's electrical performance.

[0020] (3) In the present invention, by distributing the installation ring on the outside and cooperating with the side support members, it is beneficial to improve the installation stability and provide a mounting position for the connecting ring. A number of support members are evenly distributed on the connecting ring, and a steel wire protection strip is installed on the inner side of the support member through the inner penetration block and the inner penetration sleeve, so that the steel wire protection strip is distributed on the outside to provide anti-scratch and anti-damage effects for the cable. Under the action of external force, the steel wire distribution structure design of the steel wire protection strip improves the external protection performance. It is connected by the telescopic frame and the connecting seat, and the side is provided with an elastic sheet for further buffering and support, which is beneficial to provide a buffering and shock-absorbing effect when the steel wire protection strip passes through the inner side of the inner penetration sleeve, and is beneficial to reduce the impact force on the cable when the external force is applied. The movable frame is symmetrically distributed at both ends of the inner side of the support member, and the damping rod and the spring member are connected to the movable frame at the same time. It is connected to the connecting frame, and a sliding guide wheel is provided on the inner side of the connecting frame, which can provide effective guiding effect and further buffering effect during shaking, further reducing impact force, improving the protection effect, and ensuring the protection performance. A limiting docking piece is provided at the end connection of the connecting ring and a limiting clip is provided on the outside thereof for limiting. When limiting, the inner support block on the inside of the limiting clip is squeezed between the two limiting docking pieces, and the limiting clip is used to generate an outward extrusion force to cooperate with the limiting clip, so that the connecting ring is stably installed, and a positioning strip is provided on the inner side of the limiting clip, which docks with the positioning block on the inner side of the limiting docking piece to form a precise clip connection. After the limiting clip is clipped and connected to the outside of the limiting docking piece, it is fastened to the fastening seat through the fastening plate to form a further stable fixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A perspective view of a weather-resistant insulated overhead cable according to the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of a weather-resistant insulated overhead cable according to the present invention;

[0023] Figure 3 This is a schematic diagram of the internal cross-sectional structure of a weather-resistant insulated overhead cable of the present invention;

[0024] Figure 4 This is a partial structural schematic diagram of a weather-resistant insulated overhead cable according to the present invention;

[0025] Figure 5 This is a schematic diagram of the partially exploded structure of a weather-resistant insulated overhead cable according to the present invention;

[0026] Figure 6 For the present invention Figure 5 A in the figure is an enlarged structural diagram.

[0027] In the picture:

[0028] 1. Cable structure; 101. Conductor; 102. Conductor shield; 103. Insulation layer; 104. Insulation shield; 105. Copper tape shield; 106. Filling layer; 107. Bag layer; 108. Inner sheath; 109. Steel tape armor; 2. Outer sheath; 201. Outer sheath; 202. First mounting bar; 203. Elastic support member; 204. Second mounting bar; 205. Inner support ring; 3. Outer support mechanism; 301. Mounting ring; 302. Side support member; 303. Connection Ring; 304, support member; 305, telescopic frame; 306, connecting seat; 307, elastic sheet; 308, inner wearing block; 309, inner wearing sleeve; 3091, hole; 310, movable frame; 311, damping rod; 312, spring member; 313, connecting frame; 314, sliding guide wheel; 315, limit docking member; 316, positioning block; 317, limit fastener; 318, inner support block; 319, positioning strip; 320, fastening seat; 321, fastening plate; 322, wire protection strip. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] Example 1: Figures 1-6 As shown, the present invention provides a technical solution: a weather-resistant insulated overhead cable, comprising a cable structure 1, the cable structure 1 comprising a conductor 101, an insulating layer 103, an inner sheath layer 108 and a steel tape armor 109, which is layered on the outside of the conductor 101, the insulating layer 103 insulates the conductor 101, and the inner sheath layer 108 wraps and supports the conductor 101;

[0031] An outer protective mechanism 2 is provided on the outside of the cable mechanism 1. The outer protective mechanism 2 includes an outer sheath 201, elastic support members 203, and an inner support ring body 205, which is used to wrap around the outside of the cable mechanism 1. Specifically, the elastic support members 203 are spaced clockwise along the circumference outside the steel belt armor 109, the inner support ring body 205 penetrates each elastic support member 203, and the outer sheath 201 is arranged on the outside of the elastic support members 203 to wrap around the periphery of each elastic support member 203.

[0032] In this embodiment, an inner sheath layer 108 and a steel tape armor 109 are layered on the outside of the conductor 101. The inner sheath layer 108 is primarily made of chloroprene rubber, which has excellent weather resistance, ozone resistance, chemical corrosion resistance, and flame retardancy. Carbon black enhances the wear and tear resistance of the inner sheath layer, while also improving its weather resistance. Antioxidants effectively slow the aging of the inner sheath layer, and plasticizers improve the flexibility and processing properties of the chloroprene rubber. The inner sheath layer 108 is wrapped around the shielding layer. Its excellent weather resistance can resist environmental erosion of the internal structure. Working synergistically with the outer insulation layer, it enhances the overall weather resistance of the cable. Its high wear and tear resistance prevents damage to the internal structure due to friction and pulling during installation and use, thus ensuring the integrity of the cable. Its flame retardant properties enhance the fire safety of the cable, reducing the risk of fire. Steel Belt Armor 109 uses galvanized steel belts, which have high strength and hardness and can provide reliable mechanical protection for cables. The galvanized layer can effectively prevent the steel belt from rusting and improve the corrosion resistance of the steel belt, thereby extending the service life of the steel belt armor and ensuring its long-term and stable function. Steel Belt Armor 109 significantly enhances the mechanical strength and compressive resistance of the cable. When the cable is subjected to external mechanical forces, the steel belt armor can disperse and buffer the external forces, protecting the internal conductors, insulation layers, shielding layers and other structures from damage. Its high hardness can also effectively prevent the cable from being pierced by sharp objects, ensuring the normal operation of the cable. At the same time, the corrosion resistance of the galvanized steel belt makes it less likely to rust in complex outdoor environments, maintaining good mechanical protection performance, and further improving the weather resistance and service life of the cable.

[0033] The outer sheath 201, as the outermost protective structure of the cable, mainly plays a role in all-round protection against external environmental damage. In terms of material selection, high-density polyethylene with excellent weather resistance is usually used. It can effectively resist ultraviolet radiation, rain and snow erosion, wind and sand wear, and corrosion from chemical substances, preventing the internal structure of the cable from being damaged by external environmental factors, greatly improving the service life of the cable. In addition, the outer sheath 201 also has certain flame retardant properties, which can prevent the spread of fire in the event of a fire and ensure the safety of the power transmission system. At the same time, it can also play a certain insulating role, further enhancing the electrical safety of the cable and avoiding safety hazards such as leakage caused by external factors. The elastic support members in the cable mainly perform the functions of buffering and supporting. When the cable is subjected to external mechanical forces, such as shaking caused by wind, pulling during installation or maintenance, etc., the elastic support members 203 can use their own elastic deformation to absorb and disperse external forces, preventing these external forces from directly acting on key structures such as the conductor and insulation layer inside the cable, preventing them from deformation, damage, etc. due to the force, thereby protecting the integrity of the internal structure of the cable. In complex environments, such as when temperature changes cause the cable to expand and contract, the elasticity of the elastic support can adapt to this dimensional change, providing flexible support for the cable, ensuring that the various structural parts of the cable are always in a stable state under different working conditions, and maintaining the normal power transmission performance of the cable. The main function of the inner support ring 205 is to maintain the stability of the internal structure of the cable and the regularity of its shape. During the cable production process, it provides a support framework for the internal conductor, insulation layer, shielding layer and other structures, ensuring that the relative position of each layer of structure remains fixed during laying and use, avoiding misalignment or deformation of the internal structure due to factors such as squeezing and bending, thereby ensuring the stability of the electrical performance of the cable.

[0034] Example 2: Figure 3-Figure 6 As shown, it also includes an external support mechanism 3, which includes a mounting ring 301, a connecting ring 303 is sleeved on the outside of the mounting ring 301, and a number of support members 304 are evenly distributed along the clockwise direction on the outer wall of the connecting ring 303. An inner-penetrating block 308 is fixedly installed on the inner side of the support member 304, and an inner-penetrating sleeve 309 passes through the inner-penetrating block 308. A hole 3091 is opened in the inner-penetrating sleeve 309, and a steel wire protection strip 322 passes through the hole. Connecting frames 313 are symmetrically arranged at the upper and lower ends of the inner side of the support member 304, and movable frames 310 are symmetrically arranged on the connecting frame 313. The end of each movable frame 310 away from the connecting frame 313 is connected to the inner side of the support member 304.

[0035] For further information, please refer to Figure 4A damping rod 311 is further disposed in the middle of a connecting frame 313 between adjacent movable frames 310. A spring member 312 is sleeved on the outer side of the damping rod 311, and a sliding guide wheel 314 is movably mounted on the inner side of the connecting frame 313. Telescopic frames 305 are symmetrically mounted on the support member 304, and are connected to a connecting seat 306. Elastic plates 307 are disposed on both sides of the support member 304, with a portion of each elastic plate 307 connected to the outer side of the connecting seat 306, and the other portion of each elastic plate 307 connected to the outer side of the support member 304.

[0036] Furthermore, a plurality of position-limiting mating members 315 are fixed to the outside of the connecting ring 303. Positioning blocks 316 are provided on the inside of the position-limiting mating members 315, extending along the length of the position-limiting mating members 315. A position-limiting fastener 317 is detachably attached to the position-limiting mating member 315. The end surface of the position-limiting fastener 317 extends outward to form a fastening seat 320, which is engaged with a fastening plate 321. Furthermore, the position-limiting fastener 317 is U-shaped, with an inner support block 318 fixed to the inner side of the position-limiting fastener 317 along its length. The inner support block 318 is positioned between the two position-limiting docking members 315 when the position-limiting fastener 317 and the position-limiting docking member 315 are engaged. A plurality of positioning bars 319 are disposed on the inner side of the position-limiting fastener 317. The positioning bars 319 are staggered relative to the positioning blocks 316 so that they can be inserted into the gaps between adjacent positioning blocks 316 when the position-limiting fastener 317 and the position-limiting docking member 315 are engaged. A plurality of side supports 302 are evenly distributed on both sides of the mounting ring 301 and are evenly distributed on the outer side of the outer sheath 201.

[0037] In this embodiment, by distributing the installation ring 301 on the outside of the outer protection mechanism 2, cooperating with the side support member 302, it is beneficial to improve the installation stability and provide a location for the connection ring 303 to install. A number of support members 304 are evenly distributed on the connection ring 303, and the inner side of the support member 304 is penetrated by the inner through block 308 and the inner through sleeve 309 to install a steel wire protection strip 322. The steel wire protection strip 322 is distributed on the outside to provide the cable with anti-scratch and anti-damage effects. The steel wire distribution structure design of the steel wire protection strip 322 improves the external protection performance under the action of external force. It is connected through the telescopic frame 305 in cooperation with the connecting seat 306, and An elastic sheet 307 is provided on the side to further provide buffering support, which is beneficial to providing a buffering and shock-absorbing effect when the wire protection strip 322 passes through the inner side of the inner sleeve 309, and is beneficial to reducing the impact force on the cable when subjected to external force. The movable frame 310 is symmetrically distributed at both ends of the inner side of the support member 304, and the damping rod 311 and the spring member 312 are connected to the movable frame 310 on the connecting frame 313 at the same time, and a sliding guide wheel 314 is provided on the inner side of the connecting frame 313, which can provide effective guiding effect and provide further buffering effect during shaking, further reducing the impact force, improving the protection effect, and ensuring the protection performance.

[0038] The end connection of the connecting ring 303 is provided with a limiting docking piece 315 and a limiting clip 317 on the outside thereof for limiting. When limiting, the inner support block 318 on the inside of the limiting clip 317 is squeezed between the two limiting docking pieces 315, and the limiting clip 317 is used to achieve a further tightening effect by generating an outward extrusion force, so that the connecting ring 303 is stably installed, and a positioning strip 319 is provided on the inside of the limiting clip 317 to dock with the positioning block 316 on the inside of the limiting docking piece 315 to form a precise clip connection. After the limiting clip 317 is clipped and connected to the outside of the limiting docking piece 315, it is clipped and connected to the clip seat 320 through the clip plate 321 to form a further stable fixing effect.

[0039] Example 3: Figure 1-Figure 3 As shown, one end of the elastic support member 203 is connected to the first mounting bar 202, and the other end of the elastic support member 203 is connected to the second mounting bar 204. The second mounting bar 204 is evenly distributed on the outer wall of the steel strip armor 109. The outside of the conductor 101 is provided with a conductor shield 102, and the conductor shield 102 is provided on the inner side of the insulating layer 103. The outside of the insulating layer 103 is provided with an insulating shielding layer 104, and the outside of the insulating shielding layer 104 is provided with a copper tape shielding layer 105. The outside of the copper tape shielding layer 105 is provided with a filling layer 106, and the outside of the filling layer 106 is provided with a bagging layer 107. The bagging layer 107 is provided on the inner side of the inner sheath layer 108.

[0040] In this embodiment, the first mounting bar 202 cooperates with the second mounting bar 204 to facilitate the distributed installation of the elastic support 203, and the conductor shield 102 is tightly wrapped around the outside of the conductor, and is usually made of a semi-conductive material. Its main function is to eliminate the electric field concentration phenomenon on the surface of the conductor and make the electric field distribution between the conductor and the insulation layer more uniform. Since there is inevitably a certain degree of roughness and unevenness on the surface of the conductor, electric field distortion will occur when power is applied, and the conductor shielding layer can effectively alleviate this electric field distortion, avoiding accelerated aging and breakdown of the insulation layer due to excessive local electric field strength, thereby improving the electrical insulation performance and service life of the cable; at the same time, it can also enhance the bonding force between the conductor and the insulation layer, making the two more tightly combined and ensuring the stability of the cable structure. The insulation layer 103 is one of the key structures for the cable to achieve power transmission and ensure power safety. It mainly plays the role of isolating the conductor from the outside world, preventing current leakage and leakage. By selecting materials with high insulation resistance, low dielectric constant, and excellent electrical insulation properties, current can be effectively prevented from conducting outside the cable, ensuring that current is transmitted only within the conductor, thus ensuring reliable and safe power transmission. Furthermore, the insulation layer must possess excellent heat resistance, aging resistance, and mechanical properties to withstand the various stresses and environmental factors to which the cable is subjected during installation and use, preventing damage to the insulation layer due to temperature fluctuations, mechanical forces, and other factors, thereby maintaining the cable's long-term stable insulation performance. The insulating shielding layer 104, located outside the insulating layer, is also made of a semi-conductive material. Its function mirrors that of the conductor shielding layer, primarily to uniformly distribute the electric field across the surface of the insulating layer and eliminate potential electric field concentration at the interface between the insulating layer and other structures. During cable operation, electric field distortion is easily generated at the interface between the insulating layer and subsequent structures. The insulating shielding layer effectively mitigates this, preventing partial discharge and electrical corrosion, thereby protecting the insulation layer and extending the cable's service life. Furthermore, the insulating shielding layer acts as a buffer and protector, reducing the direct impact of external mechanical forces on the insulation layer and maintaining the integrity of the cable's internal structure. The copper tape shielding layer 105 is made of copper tape wrapped or woven, and is an important structure for electromagnetic shielding and grounding protection of the cable. In terms of electromagnetic shielding, it can effectively block external electromagnetic interference from entering the cable, prevent interference signals from affecting the current transmitted by the cable, and ensure the stability and accuracy of power transmission; at the same time, it can also suppress the interference of the electromagnetic field generated by the current inside the cable on external electronic equipment, meeting the needs of some application scenarios with high requirements for the electromagnetic environment. In terms of grounding protection, when an insulation fault occurs in the cable, the copper tape shielding layer can serve as a channel for short-circuit current, quickly conducting the fault current into the ground, avoiding electric shock to people and damage to equipment, and improving the safety of cable operation. In addition, the copper tape shielding layer can also play a certain mechanical protection role, enhancing the overall strength and anti-extrusion ability of the cable. The filling layer 106 is usually made of some soft and elastic rubber material, filling the gaps between the various structures inside the cable.Its primary function is to make the cable structure more compact and rounded, ensuring the relative stability of the various structural components during production, installation, and use, and preventing internal structural misalignment and deformation due to looseness, which could affect cable performance. Filling layer 106 fills gaps and disperses mechanical stress on the cable, reducing damage to the internal structure caused by external forces. Furthermore, the filling layer material generally has certain cushioning and shock-absorbing properties, further protecting key structures such as the conductor and insulation layer within the cable. It also improves the cable's flexibility to a certain extent, facilitating its installation and installation. Bag layer 107, made of materials such as non-woven fabric and polyester tape, is wrapped around the cable's exterior to protect and secure the cable's internal structure. On the one hand, bag layer 107 prevents the filling layer material from dispersing, maintaining the integrity of the cable's internal structure. On the other hand, it constrains the various layers within the cable, enhancing the cable's overall mechanical strength and preventing displacement or loosening of the internal structure when subjected to external forces. In addition, the bagging layer 107 can also isolate external impurities such as moisture, dust, etc. to a certain extent, reduce their erosion on the internal structure of the cable, and play a certain auxiliary role in improving the weather resistance and service life of the cable; at the same time, the surface properties of the bagging layer 107 material also contribute to the subsequent coating of structures such as the outer sheath, making the connection between the various layers of the cable structure tighter.

[0041] In the present invention, when the weather-resistant insulated overhead cable is in use, the insulation layer 103 primarily isolates the conductor from the outside world, preventing current leakage and leakage. By selecting materials with high insulation resistance, low dielectric constant, and excellent electrical insulation properties, this effectively prevents current from conducting outside the cable, ensuring that current is transmitted only within the conductor. The insulating shielding layer 104, located outside the insulation layer and also made of a semi-conductive material, mirrors the conductor shielding layer, primarily by uniformizing the electric field on the surface of the insulation layer. The copper tape shielding layer 105, made of wrapped or woven copper tape, is a key component of the cable's electromagnetic shielding and grounding protection. Regarding electromagnetic shielding, it effectively blocks external electromagnetic interference from entering the cable, preventing interference signals from affecting the current transmitted by the cable and ensuring stable and accurate power transmission. The filling layer 106, typically made of a soft and elastic rubber material, fills the gaps between the various internal cable structures. The bagging layer 107, made of materials such as non-woven fabric and polyester tape, is wrapped around the cable's exterior to protect and secure the cable's internal structures. The inner sheath 108, wrapped around the shielding layer, further protects the inner insulation and shielding layers. Its excellent weather resistance protects the cable's internal structures from environmental erosion. Working in synergy with the outer insulation layer, it enhances the cable's overall weather resistance. Its high abrasion and tear resistance prevents damage to the cable's internal structure due to friction and pulling during installation and use. The steel tape armor 109 significantly enhances the cable's mechanical strength and compressive strength. When the cable is subjected to external mechanical forces, the steel tape armor disperses and buffers the forces, protecting the internal conductors, insulation, and shielding layers from damage. Its high hardness also effectively prevents punctures from sharp objects, ensuring proper operation. The outer sheath 201, the cable's outermost protective layer, primarily provides comprehensive protection against environmental damage. High-density polyethylene (HDPE), with excellent weather resistance, is typically used. It effectively resists UV radiation, rain and snow erosion, wind and sand abrasion, and chemical corrosion, preventing damage to the cable's internal structure due to environmental factors and significantly extending the cable's service life. In addition, the outer sheath 201 also has certain flame retardant properties, which can prevent the spread of fire in the event of a fire and ensure the safety of the power transmission system. At the same time, it can also play a certain insulating role, further enhancing the electrical safety of the cable and avoiding safety hazards such as leakage caused by external factors. The elastic support member in the cable mainly performs the functions of buffering and supporting. When the cable is subjected to external mechanical forces, such as shaking caused by wind, pulling during installation or maintenance, etc., the elastic support member 203 can use its own elastic deformation to absorb and disperse external forces, preventing these external forces from directly acting on key structures such as the conductor and insulation layer inside the cable, preventing them from deformation, damage and other problems due to the force, thereby protecting the integrity of the cable's internal structure.In complex environments, such as when temperature changes cause the cable to expand and contract, the elasticity of the elastic support can adapt to this dimensional change, providing flexible support for the cable, ensuring that the various structural parts of the cable are always in a stable state under different working conditions, and maintaining the normal power transmission performance of the cable. The main function of the inner support ring 205 is to maintain the stability of the internal structure of the cable and the regularity of its shape. During the cable production process, it provides a support framework for the internal conductor, insulation layer, shielding layer and other structures, ensuring that the relative position of each layer of structure remains fixed during laying and use, avoiding misalignment or deformation of the internal structure due to factors such as squeezing and bending, thereby ensuring the stability of the electrical performance of the cable.

[0042] The installation ring 301 is distributed on the outside and matched with the side support member 302 to improve the installation stability and provide a location for the connection ring 303 to be installed. A number of support members 304 are evenly distributed on the connection ring 303, and the inner side of the support member 304 is penetrated by the inner through block 308 and the inner through sleeve 309 to install a steel wire protection strip 322, which is convenient for the cable to be provided with anti-scratch and anti-damage effects through the steel wire protection strip 322 distributed on the outside. The steel wire distribution structure design of the steel wire protection strip 322 improves the external protection performance under the action of external force. It is connected through the telescopic frame 305 and the connection seat 306, and the side is provided with an elastic force. The sheet 307 further provides buffering support, which is beneficial for providing a buffering and shock-absorbing effect when the wire protection strip 322 passes through the inner side of the inner sleeve 309, and is beneficial for reducing the impact force on the cable when subjected to external force. It is symmetrically distributed at both ends of the inner side of the support member 304 through the movable frame 310, and is connected to the connecting frame 313 with the movable frame 310 at the same time by using the damping rod 311 and the spring member 312, and a sliding guide wheel 314 is provided on the inner side of the connecting frame 313, which can provide effective guiding effect and provide further buffering effect during shaking, further reducing the impact force, improving the protection effect, and ensuring the protection performance.

[0043] The end connection of the connecting ring 303 is provided with a limiting docking piece 315 and a limiting clip 317 is provided on the outside thereof for limiting. When limiting, the inner support block 318 on the inside of the limiting clip 317 is squeezed between the two limiting docking pieces 315, and the limiting clip 317 is combined with the outward extrusion force to achieve a further tightening effect, so that the connecting ring 303 is stably installed, and the inner side of the limiting clip 317 is provided with a positioning strip 319 which docks with the positioning block 316 on the inner side of the limiting docking piece 315 to form a precise clamping connection. After the limiting clip 317 is clamped on the outside of the limiting docking piece 315, it is fastened to the fastening seat 320 through the fastening plate 321 to form a further stable fixing effect.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A weather-resistant insulated overhead cable, comprising a cable mechanism (1), characterized in that: The cable structure (1) comprises a conductor (101), an insulating layer (103), an inner sheath layer (108) and a steel tape armor (109), wherein the inner sheath layer (108) is used to wrap and support the conductor (101); An outer protective mechanism (2) is provided on the outside of the cable mechanism (1), the outer protective mechanism (2) comprising an outer sheath (201), an elastic support member (203) and an inner support ring body (205), the outer protective mechanism (2) being used to wrap around the outside of the cable mechanism (1), the elastic support members (203) being distributed at intervals along the circumferential direction on the outside of the steel belt armor (109), the inner support ring body (205) penetrating through each elastic support member (203) along the circumferential direction, and an outer sheath (201) for wrapping the elastic support member (203) being further provided on the periphery of each elastic support member (203); The device further comprises an external support mechanism (3), wherein the external support mechanism (3) comprises a mounting ring (301), a connecting ring (303) is sleeved on the outer side of the mounting ring (301), a plurality of support members (304) are evenly distributed along the circumferential direction on the outer side of the connecting ring (303), an inner wear block (308) is fixed on the inner side of the support member (304), an inner wear sleeve (309) passes through the inner wear block (308), a hole (3091) is provided on the inner wear sleeve (309), and a steel wire protection The strip (322) passes through the hole (3091); a connecting frame (313) is symmetrically arranged on the inner side of the support member (304); a movable frame (310) is symmetrically arranged on one side of the connecting frame (313); a damping rod (311) is arranged in the middle of one side of the connecting frame (313) between adjacent movable frames (310); a spring member (312) is sleeved on the outer side of the damping rod (311); and a sliding guide wheel (314) is arranged on the other side of the connecting frame (313).

2. The weather-resistant insulated overhead cable according to claim 1, characterized in that: Telescopic frames (305) are respectively installed on the left and right sides of the support member (304), and a connecting seat (306) is connected between two adjacent telescopic frames (305). Elastic sheets (307) are provided on both sides of the support member (304), and the elastic sheets (307) are connected to the outer sides of the connecting seat (306), and the elastic sheets (307) are connected to the outer sides of the support member (304).

3. The weather-resistant insulated overhead cable according to claim 2, characterized in that: A plurality of position-limiting docking members (315) are fixed on the outside of the connecting ring (303), and a position-limiting fastener (317) is detachably connected to the position-limiting docking member (315); a plurality of positioning blocks (316) are arranged at intervals on the inside of the position-limiting docking member (315), and the end surface of the position-limiting fastener (317) extends outward to form a fastening seat (320), and a fastening plate (321) is fastened and connected to the fastening seat (320).

4. The weather-resistant insulated overhead cable according to claim 3, characterized in that: The inner side of the limiting fastener (317) is fixed with an inner support block (318) along the length direction. A plurality of positioning strips (319) are provided on the inner side of the limiting fastener (317). The positioning strips (319) are staggered relative to each positioning block (316). When the limiting fastener (317) is engaged with the limiting docking member (315), the positioning strips (319) are inserted into the gap between adjacent positioning blocks (316).

5. The weather-resistant insulated overhead cable according to claim 1, characterized in that: A plurality of side support members (302) are evenly distributed on the outer periphery of the outer sheath (201) and on both the front and rear sides of the mounting ring (301).

6. The weather-resistant insulated overhead cable according to claim 1, characterized in that: One end of the elastic support member (203) is connected to a first mounting bar (202), and the first mounting bar (202) is evenly distributed on the inner side of the outer sheath (201); the other end of the elastic support member (203) is connected to a second mounting bar (204), and the second mounting bar (204) is evenly distributed on the outer wall of the steel strip armor (109).

7. The weather-resistant insulated overhead cable according to claim 1, characterized in that: A conductor shield (102) is provided on the outside of the conductor (101), the conductor shield (102) is provided on the inside of the insulating layer (103), an insulating shielding layer (104) is provided on the outside of the insulating layer (103), a copper tape shielding layer (105) is provided on the outside of the insulating shielding layer (104), and a filling layer (106) is provided on the outside of the copper tape shielding layer (105).

8. The weather-resistant insulated overhead cable according to claim 7, characterized in that: A bagging layer (107) is provided on the outer side of the filling layer (106), and the bagging layer (107) is provided on the inner side of the inner sheath layer (108).

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