Weather-resistant insulated overhead cable

Abstract

The invention discloses a weather-resistant insulating overhead cable, which relates to the technical field of cables, comprises a cable mechanism, and is characterized in that the cable mechanism comprises conductors, an insulating layer, an inner sheath layer and a steel tape armor; according to the invention, the inner sheath layer and the steel tape armoring are arranged at the outer side of the conductor in a layered manner, 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 retardance, and carbon black can enhance the wear resistance and tear resistance of the inner sheath layer and improve the weather resistance of the inner sheath layer at the same time; the anti-aging agent can effectively delay the aging speed of the inner sheath layer, the plasticizer improves the flexibility and processability of the chloroprene rubber, the inner sheath layer wraps 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 erosion of the external environment to the internal structure, and the inner sheath layer and the outer insulating layer act synergistically, so that the service life of the cable is prolonged. And the overall weather resistance of the cable is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and particularly 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 long-term exposed to the outdoor environment and need to withstand various complex climatic conditions, such as ultraviolet radiation, rain and snow erosion, high and low temperature changes, etc.

[0003] In the prior art, such as the "weather-resistant insulated overhead cable" with the patent publication number: CN218038617U, includes several conductors. An outer sheath of weather-resistant polyethylene insulation is sleeved on the outside of several said conductors, and several protection mechanisms are sleeved on the outside of the weather-resistant polyethylene insulation layer. The protection mechanism includes a convex block, a concave block, a heat-conducting insulation layer, a heat-insulating layer, a heat-insulating layer, an anti-aging layer, a wear-resistant layer, a return spring and a card joint. And with the use of the heat-conducting insulation layer, the heat-insulating layer, the heat-insulating layer, the anti-aging layer and the wear-resistant layer in cooperation, during the use of the overhead cable, the high temperature resistance, cold resistance, anti-aging and wear resistance of the overhead cable can be improved, and the firmness of the overhead cable can be further strengthened, so as to achieve the purpose of improving the weather resistance of the overhead cable and long-term use.

[0004] Existing cables, due to the single structure design, need to be laid flat along the erection line on the ground before overhead laying. During the process of laying flat and erecting, it is easy to be rolled over by passing personnel and vehicles. Existing cables basically adopt a tightly connected distribution method. Excessive rolling is likely to cause damage to the internal core conductors, and it is impossible to detect and handle them in time, thus affecting the subsequent power supply work. In view of 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 problems in the prior art that during operation, before overhead laying, it needs to be laid flat along the erection line on the ground, and during the process of laying flat and erecting, it is easy to be rolled over by passing personnel and vehicles. Existing cables basically adopt a tightly connected distribution method. Excessive rolling is likely to cause damage to the internal core conductors, and it is impossible to detect and handle them in time, thus affecting the subsequent power supply work.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A weather-resistant insulated overhead cable, including a cable mechanism, characterized in that: the cable mechanism includes a conductor, an insulating layer, an inner sheath layer and a steel tape armor, and the inner sheath layer is used to wrap and support the conductor; An outer protection mechanism is provided on the outer side of the cable mechanism. The outer protection mechanism includes an outer sheath, elastic support members, and an inner support ring body. The outer protection mechanism is used to wrap around the outside of the cable mechanism. The elastic support members are circumferentially spaced apart on the outside of the steel tape armor, and the inner support ring body penetrates through each elastic support member in the circumferential direction. An outer sheath for wrapping the elastic support members is further provided on the periphery of each elastic support member.

[0007] Preferably, it further includes an outer support mechanism. The outer support mechanism includes a mounting ring. A connecting ring is sleeved on the outside of the mounting ring. A plurality of support members are evenly distributed on the outside of the connecting ring in the circumferential direction. An inner penetrating block is fixed inside the support member. An inner penetrating sleeve penetrates through the inner penetrating block, and holes are formed in the inner penetrating sleeve. A steel wire protection strip penetrates through the holes.

[0008] Preferably, connecting frames are symmetrically arranged inside the support members. Moving frames are symmetrically arranged on one side of the connecting frames. Between adjacent moving frames, a damping rod is arranged in the middle of one side of the connecting frame. A spring member is sleeved on the outside of the damping rod, and a sliding guide wheel is arranged on the other side of the connecting frame.

[0009] Preferably, telescopic frames are respectively installed on the left and right sides of the support member. A connecting seat is connected between two adjacent telescopic frames. Elastic sheets are arranged on both sides of the support member. One part of the elastic sheet is connected to the outside of the connecting seat, and the other part of the elastic sheet is connected to the outside of the support member.

[0010] Preferably, a plurality of limit docking members are fixed on the outside of the connecting ring. A limit buckle member is detachably connected to the limit docking member; a plurality of positioning blocks are arranged at intervals inside the limit docking member. The end face of the limit buckle member extends outward to form a fastening seat, and a fastening plate is clamped and connected to the fastening seat.

[0011] Preferably, an inner support block is fixed along the length direction inside the limit buckle member. A plurality of positioning strips are arranged inside the limit buckle member. The positioning strips are staggered with respect to each positioning block. When the limit buckle member is matched with the limit docking member, the positioning strips are inserted into the gaps between adjacent positioning blocks.

[0012] Preferably, a plurality of side support members are evenly distributed on the front and back sides of the mounting ring on the outer periphery of the outer sheath.

[0013] Preferably, one end of the elastic support member is connected to a first mounting strip, and the first mounting strips are evenly distributed on the inside of the outer sheath. The other end of the elastic support member is connected to a second mounting strip, and the second mounting strips are evenly distributed on the outer wall of the steel tape armor.

[0014] Preferably, a conductor shield is provided on the outer side of the conductor. The conductor shield is arranged on the inner side of the insulating layer. An insulating shield layer is provided on the outer side of the insulating layer. A copper tape shield layer is provided on the outer side of the insulating shield layer. A filling layer is provided on the outer side of the copper tape shield layer.

[0015] Preferably, a wrapping layer is provided on the outer side of the filling layer. The wrapping layer is arranged on the inner side of the inner sheath layer.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) In the present invention, the inner sheath layer and the steel tape armor are arranged in layers on the outer side of the conductor. The inner sheath layer uses chloroprene rubber as the main raw material. 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 at the same time improve its weather resistance. The anti-aging agent 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 wraps the shield layer, playing a further protective role for the inner insulating layer and the shield layer. Its good weather resistance can resist the erosion of the external environment on the internal structure, and cooperate with the outer insulating 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, ensuring the integrity of the cable. The flame retardant performance improves the fire safety performance of the cable and reduces the risk of fire. The steel tape armor is made of galvanized steel tape, which has high strength and hardness and can provide reliable mechanical protection for the cable. The galvanized layer can effectively prevent the steel tape from rusting and improve the corrosion resistance of the steel tape, thereby extending the service life of the steel tape armor and ensuring its long-term stable operation. The steel tape armor significantly enhances the mechanical strength and compressive capacity of the cable. When the cable is subjected to external mechanical force, the steel tape armor can disperse and buffer the external force, protecting the internal conductor, insulating layer, shield layer and other structures from damage. Its high hardness can also effectively prevent the cable from being punctured by sharp objects, ensuring the normal operation of the cable. At the same time, the corrosion resistance of the galvanized steel tape makes it not easy to rust in the complex outdoor environment, maintaining good mechanical protection performance and further improving the weather resistance and service life of the cable.

[0017] (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.

[0018] (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 facilitate providing a position for installing the connection ring. A number of support members are evenly distributed on the connection ring, and a steel wire protection strip is installed through the inner penetration block and the inner penetration sleeve on the inner side of the support member. It is convenient to provide anti-scratch and anti-breakage effects on the cable through the distribution of the steel wire protection strip on the outside. Due to the design of the steel wire distribution structure of the steel wire protection strip under external force, the external protection performance is improved. It is connected through the telescopic frame and the connection seat, and elastic pieces are provided on the side to further buffer and support. Furthermore, when the steel wire protection strip penetrates into the inner side of the inner penetration sleeve, it provides a buffering and shock-absorbing effect, which is beneficial to reducing the impact force on the cable when subjected to external forces. The movable frames are symmetrically distributed at both ends of the inner side of the support member. The damping rods and the spring members are simultaneously connected to the movable frames on the connection frame, and sliding guide wheels are provided on the inner side of the connection frame, which can provide an effective guiding effect and further buffer effect during the shaking process, further reducing the impact force and improving the protection effect and ensuring the protection performance. The end connection of the connection ring is provided with a limit docking member and a limit buckle member is provided on its outside for limiting. During the limiting, the inner support block inside the limit buckle member is pressed between the two limit docking members, and an outward extrusion force is generated to cooperate with the limit buckle member to achieve a further tightening effect, making the connection ring stably installed. And a positioning strip is provided on the inner side of the limit buckle member to be docked with the positioning block on the inner side of the limit docking member to form a precise clamping connection. After the limit buckle member is clamped and connected to the outside of the limit docking member, it is buckled and connected to the fastening seat through the fastening plate to form a further stable fixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional view of a weather-resistant insulated overhead cable according to the present invention; Figure 2 is a schematic cross-sectional structure view of a weather-resistant insulated overhead cable according to the present invention; Figure 3 is a schematic internal cross-sectional structure view of a weather-resistant insulated overhead cable according to the present invention; Figure 4 is a schematic partial structure view of a weather-resistant insulated overhead cable according to the present invention; Figure 5 is a schematic partial exploded structure view of a weather-resistant insulated overhead cable according to the present invention; Figure 6 According to the present invention Figure 5 is an enlarged schematic view of part A in.

[0020] In the figure: 1. Cable mechanism; 101. Conductor; 102. Conductor shield; 103. Insulation layer; 104. Insulation shield layer; 105. Copper tape shield layer; 106. Filling layer; 107. Wrapping layer; 108. Inner sheath layer; 109. Steel tape armor; 2. Outer protection mechanism; 201. Outer sheath; 202. First mounting strip; 203. Elastic support member; 204. Second mounting strip; 205. Inner support ring body; 3. Outer support mechanism; 301. Mounting ring; 302. Side support member; 303. Connecting ring; 304. Support member; 305. Telescopic frame; 306. Connecting seat; 307. Elastic piece; 308. Inner through block; 309. Inner through 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 buckle member; 318. Inner support block; 319. Positioning strip; 320. Tightening seat; 321. Tightening plate; 322. Steel wire protection strip. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment 1: As Figures 1-6 shown, the present invention provides a technical solution: a weather-resistant insulated overhead cable, including a cable mechanism 1, the cable mechanism 1 includes a conductor 101, an insulation layer 103, an inner sheath layer 108 and a steel tape armor 109, which are used to be arranged on the outer side of the conductor 101 in layers, the insulation layer 103 insulates the conductor 101, and the inner sheath layer 108 wraps and supports the conductor 101; An outer protection mechanism 2 is arranged on the outer side of the cable mechanism 1, and the outer protection mechanism 2 includes an outer sheath 201, an elastic support member 203 and an inner support ring body 205, which are used to wrap the outside of the cable mechanism 1. Specifically, the elastic support members 203 are distributed at intervals in the clockwise direction along the circumferential direction on the outside of the steel tape armor 109, the inner support ring body 205 penetrates through each elastic support member 203, and the outer sheath 201 is sleeved on the outside of the elastic support members 203 to realize wrapping around the periphery of each elastic support member 203.

[0023] In this embodiment, the inner sheath layer 108 and the steel tape armor 109 are arranged in layers on the outside of the conductor 101. The inner sheath layer 108 uses chloroprene rubber as the main raw material. 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, while improving its weather resistance. The anti-aging agent can effectively delay the aging speed of the inner sheath layer, and the plasticizer improves the flexibility and processing performance of chloroprene rubber. The inner sheath layer 108 is wrapped outside the shielding layer. Its good weather resistance can resist the erosion of the external environment on the internal structure, and cooperate 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, ensuring the integrity of the cable; the flame retardant performance improves the fire safety performance of the cable and reduces the risk of fire. The steel tape armor 109 is made of galvanized steel tape, which has high strength and hardness and can provide reliable mechanical protection for the cable; the galvanized layer can effectively prevent the steel tape from rusting, improve the corrosion resistance of the steel tape, thereby extending the service life of the steel tape armor and ensuring its long-term stable operation. The steel tape armor 109 significantly enhances the mechanical strength and compressive capacity of the cable. When the cable is subjected to external mechanical force, the steel tape armor can disperse and buffer the external force, protecting the internal conductor, insulation layer, shielding layer 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 tape makes it not easy to rust in the complex outdoor environment, maintaining good mechanical protection performance and further improving the weather resistance and service life of the cable.

[0024] 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.

[0025] Example 2: Figures 3-6 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.

[0026] For further information, please refer to Figure 4, between adjacent movable frames 310, a damping rod 311 is further provided in the middle of the connecting frame 313. A spring member 312 is sleeved outside the damping rod 311, and a sliding guide wheel 314 is movably installed inside the connecting frame 313. Telescopic frames 305 are symmetrically installed on the support member 304. A connecting seat 306 is connected to the telescopic frames 305. Elastic pieces 307 are provided on both sides of the support member 304. A part of each elastic piece 307 is connected to the outside of the connecting seat 306, and the other part of each elastic piece 307 is connected to the outside of the support member 304.

[0027] Further, a plurality of limit docking members 315 are fixed on the outside of the connecting ring 303. A positioning block 316 is provided inside the limit docking member 315, and the positioning block 316 is arranged along the length direction of the limit docking member 315. A limit buckle member 317 is detachably arranged on the limit docking member 315. The end face of the limit buckle member 317 extends outward to form a fastening seat 320, and the fastening seat 320 is clamped with a fastening plate 321. Further, the limit buckle member 317 is in a "U" shape. An inner support block 318 is fixed along the length direction inside the limit buckle member 317. The inner support block 318 is arranged between two limit docking members 315 when the limit buckle member 317 is engaged with the limit docking member 315. A plurality of positioning bars 319 are provided inside the limit buckle member 317. The positioning bars 319 are arranged staggered with respect to each positioning block 316, so that the positioning bars 319 can be inserted into the gap between adjacent positioning blocks 316 when the limit buckle member 317 is engaged with the limit docking member 315. A plurality of side support members 302 are evenly distributed on both sides of the installation ring 301, and the side support members 302 are evenly distributed on the outside of the outer sheath 201.

[0028] In this embodiment, by distributing the mounting ring 301 on the outside of the outer protection mechanism 2, it is beneficial to improve the mounting stability in cooperation with the side support member 302, which facilitates providing a mounting position for the connecting ring 303. A number of support members 304 are evenly distributed on the connecting ring 303, and a steel wire protection strip 322 is installed through the inner through-block 308 and the inner through-sleeve 309 on the inner side of the support member 304. The steel wire protection strip 322 provides an anti-scratch and anti-breakage effect on the cable when distributed on the outside. Under the action of external force, the steel wire distribution structure design of the steel wire protection strip 322 improves the external protection performance. The telescopic frame 305 is connected with the connecting seat 306, and elastic pieces 307 are arranged on the side to provide further buffering support. Therefore, when the steel wire protection strip 322 penetrates into the inner side of the inner through-sleeve 309, it provides a buffering and shock-absorbing effect, which is beneficial to reducing the impact force generated on the cable when receiving external force. The movable frames 310 are symmetrically distributed at both inner ends of the support member 304. The damping rods 311 and the spring members 312 are simultaneously connected to the movable frames 310 on the connecting frame 313, and sliding guide wheels 314 are arranged on the inner side of the connecting frame 313, which can provide an effective guiding function and a further buffering effect during the shaking process, further reducing the impact force and improving the protection effect and ensuring the protection performance.

[0029] The end connection of the connecting ring 303 is provided with a limit docking member 315, and a limit buckle member 317 is arranged on its outer side for limiting. When limiting, the inner support block 318 on the inner side of the limit buckle member 317 is pressed between the two limit docking members 315, and an outward extrusion force is generated to cooperate with the limit buckle member 317 to achieve a further fastening effect, so that the connecting ring 303 is stably installed. And a positioning strip 319 on the inner side of the limit buckle member 317 is docked with a positioning block 316 on the inner side of the limit docking member 315 to form a precise clamping connection. After the limit buckle member 317 is clamped and connected to the outside of the limit docking member 315, it is clamped and connected to the fastening seat 320 through the fastening plate 321 to form a further stable fixing effect.

[0030] Embodiment 3: As Figures 1-3 shown, one end of the elastic support member 203 is connected with a first mounting strip 202, and the other end of the elastic support member 203 is connected with a second mounting strip 204. The second mounting strips 204 are evenly distributed on the outer wall of the steel tape armor 109. A conductor shield 102 is arranged on the outside of the conductor 101. The conductor shield 102 is arranged on the inner side of the insulating layer 103. An insulating shield layer 104 is arranged on the outside of the insulating layer 103. A copper tape shield layer 105 is arranged on the outside of the insulating shield layer 104. A filling layer 106 is arranged on the outside of the copper tape shield layer 105. A wrapping layer 107 is arranged on the outside of the filling layer 106. The wrapping layer 107 is arranged on the inner side of the inner sheath layer 108.

[0031] In this embodiment, the first mounting strip 202 and the second mounting strip 204 are used to facilitate the distributed installation of the elastic support member 203. The conductor shield 102 is tightly wrapped around the outside of the conductor and is usually made of a semiconductive material. Its main function is to eliminate the electric field concentration on the surface of the conductor and make the electric field distribution between the conductor and the insulating layer more uniform. Since there are inevitably certain roughness and unevenness on the surface of the conductor, electric field distortion will occur when energized. The conductor shield layer can effectively mitigate this electric field distortion, prevent the insulating layer from accelerating aging and breakdown 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 adhesion between the conductor and the insulating layer, making the two combine more tightly and ensuring the stability of the cable structure. The insulating layer 103 is one of the key structures for the cable to achieve power transmission and ensure electrical safety. It mainly plays the role of isolating the conductor from the outside world, preventing current leakage and electric shock. By selecting materials with high insulation resistance, low dielectric constant, and excellent electrical insulation performance, it can effectively prevent the current from conducting to the outside of the cable, ensuring that the current is only transmitted in the conductor and guaranteeing the reliability and safety of power transmission. In addition, the insulating layer also needs to have good heat resistance, aging resistance, and mechanical properties to withstand various stresses and environmental factors during the laying and use of the cable, avoid damage to the insulating layer caused by temperature changes, mechanical external forces, etc., and maintain the long-term stable insulation performance of the cable. The insulation shield layer 104 is located outside the insulating layer and is also made of a semiconductive material. Its function corresponds to that of the conductor shield layer, mainly to uniform the electric field on the surface of the insulating layer and eliminate the possible electric field concentration problem at the interface between the insulating layer and other structures. When the cable is running, electric field distortion is likely to occur at the interface between the insulating layer and the subsequent structure. The insulation shield layer can effectively improve this situation, prevent partial discharge from occurring, avoid the insulating layer from being electro-corroded, thereby protecting the insulating layer and extending the service life of the cable. At the same time, the insulation shield layer can also play a buffering and protecting role, reducing the direct impact of external mechanical forces on the insulating layer and maintaining the integrity of the internal structure of the cable. The copper tape shield layer 105 is formed by winding or braiding copper tape and is an important structure for the electromagnetic shielding and grounding protection of the cable. In terms of electromagnetic shielding, it can effectively block external electromagnetic interference from entering the cable interior, 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 electromagnetic field generated by the current inside the cable from interfering with external electronic devices, meeting the requirements of some application scenarios with high electromagnetic environment requirements. In terms of grounding protection, when an insulation fault occurs in the cable, the copper tape shield layer can serve as a channel for short-circuit current, quickly conducting the fault current into the ground, avoiding electric shock to personnel and equipment damage, and improving the safety of cable operation. In addition, the copper tape shield 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 materials and fills the gaps between the various structures inside the cable.Its main function is to make the cable structure more compact and round, ensuring the relative position stability of each part of the cable structure during the production, laying and use processes, and avoiding the dislocation and deformation of the internal structure caused by the loose structure, which may affect the cable performance. By filling the voids with the filling layer 106, the mechanical stress on the cable can also be dispersed, reducing the damage to the internal structure caused by external forces; in addition, the filling layer material generally also has certain buffering and shock-absorbing properties, which can further protect the key structures such as the conductors and insulation layers inside the cable, and at the same time improve the flexibility of the cable to a certain extent, facilitating the installation and laying of the cable. The wrapping layer 107 is wrapped around the outside of the cable with materials such as non-woven fabric and polyester tape, playing a role in protecting and fixing the internal structure of the cable. On the one hand, the wrapping layer 107 can prevent the filling layer material from scattering and maintain the integrity of the internal structure of the cable; on the other hand, it can restrain the various layers of the internal structure of the cable, enhancing the overall mechanical strength of the cable, so that when the cable is subjected to external forces, the internal structure is not easily displaced or loosened. In addition, the wrapping layer 107 can also isolate external moisture, dust and other impurities to a certain extent, reducing their erosion of the internal structure of the cable, which has a certain auxiliary effect on improving the weather resistance and service life of the cable; at the same time, the surface characteristics of the wrapping layer 107 material also contribute to the subsequent coating of structures such as the outer sheath, making the combination between the various layers of the cable structure more compact.

[0032] 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 uniforming 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 internal cable 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.

[0033] 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.

[0034] 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.

[0035] 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A weather-resistant insulated overhead cable, comprising a cable mechanism (1), characterized in that: The cable mechanism (1) includes a conductor (101), an insulating layer (103), an inner sheath layer (108), and a steel tape armor (109), and the inner sheath layer (108) is used to wrap and support the conductor (101). An outer protection mechanism (2) is arranged outside the cable mechanism (1). The outer protection mechanism (2) includes an outer sheath (201), an elastic support member (203), and an inner support ring body (205). The outer protection mechanism (2) is used to wrap the outside of the cable mechanism (1). The elastic support members (203) are distributed at intervals in the circumferential direction outside the steel tape armor (109). The inner support ring body (205) penetrates each elastic support member (203) in the circumferential direction, and an outer sheath (201) for wrapping the elastic support member (203) is further arranged on the periphery of each elastic support member (203). It further includes an outer support mechanism (3). The outer support mechanism (3) includes a mounting ring (301). A connecting ring (303) is sleeved outside the mounting ring (301). A plurality of support members (304) are evenly distributed in the circumferential direction outside the connecting ring (303). An inner penetrating block (308) is fixed inside the support member (304). An inner penetrating sleeve (309) penetrates the inner penetrating block (308). A hole (3091) is formed in the inner penetrating sleeve (309), and a steel wire protection strip (322) penetrates the hole (3091). Connecting frames (313) are symmetrically arranged inside the support members (304). Moving frames (310) are 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 moving frames (310). A spring member (312) is sleeved outside the damping rod (311). 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, wherein: Expansion frames (305) are respectively installed on the left and right sides of the support member (304). A connecting seat (306) is connected between two adjacent expansion frames (305). Elastic sheets (307) are arranged on both sides of the support member (304). The elastic sheets (307) are connected to the outside of the connecting seat (306), and the elastic sheets (307) are connected to the outside of the support member (304).

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

4. The weather-resistant insulated overhead cable according to claim 3, characterized in that: An inner support block (318) is fixedly arranged along the length direction on the inner side of the limit snap part (317). A plurality of positioning bars (319) are arranged on the inner side of the limit snap part (317). The positioning bars (319) are arranged staggeredly relative to the respective positioning blocks (316). When the limit snap part (317) is matched with the limit docking part (315), the positioning bars (319) are inserted into the gaps between adjacent positioning blocks (316).

5. The weather-resistant insulated overhead cable according to claim 1, wherein: On the outer periphery of the outer sheath (201), a plurality of side support parts (302) are evenly distributed on the front and rear sides of the mounting ring (301).

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

7. The weather-resistant insulated overhead cable according to claim 1, wherein: A conductor shield (102) is arranged on the outer side of the conductor (101). The conductor shield (102) is arranged on the inner side of the insulating layer (103). An insulating shield layer (104) is arranged on the outer side of the insulating layer (103). A copper tape shield layer (105) is arranged on the outer side of the insulating shield layer (104). A filling layer (106) is arranged on the outer side of the copper tape shield layer (105).

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

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