High strength aerial insulated cable

Abstract

The application relates to the cable technical field and discloses a high-strength overhead insulated cable, which comprises an outer insulation sleeve, a steel core wire arranged at a middle position in the outer insulation sleeve, a plurality of inner insulation sleeves arranged at equal intervals in a ring shape outside the steel core wire, a conductor in a spiral shape arranged in the inner insulation sleeve, a plurality of disc bodies installed at equal intervals in the outer insulation sleeve, a plurality of annular grooves processed at equal intervals on the outer surface of the outer insulation sleeve, a ring arranged in the annular groove, a plurality of blind holes opened at equal intervals in a ring shape on the annular side surface of the disc body, a positioning pin inserted in the blind hole, and the positioning pin penetrating through the outer insulation sleeve and being in contact with the inner wall of the ring in the annular groove. The application has the following beneficial effects: a plurality of disc bodies are arranged at equal intervals in the outer insulation sleeve, the disc bodies are fixedly connected with the steel core wire, the steel core wire is formed into multi-point segmented support, the tension is dispersed, local stress concentration is avoided, the inner disc body and the outer structure are rigidly linked through the positioning pin, and the state of the steel core wire can be directly reflected.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to a high-strength overhead insulated cable. Background Technology

[0002] Overhead insulated cables, a commonly used type of specialized cable in power transmission lines, are equipped with an insulation layer and an outer protective sheath. Their manufacturing process references mature cross-linked cable manufacturing processes, resulting in a well-structured design and excellent insulation performance. They are widely used in urban and rural power grid construction and long-distance outdoor power transmission. Compared to traditional bare conductors, overhead insulated cables, with their outer insulation structure, can prevent leakage and short-circuit faults caused by contact with trees, cross-line connections, and damp environments such as rain and snow. Their operational safety and environmental adaptability are superior, making them the mainstream cable choice in current overhead power transmission systems.

[0003] In terms of structural design, overhead insulated cables all have steel core wires running through them as the core load-bearing components. During the installation and long-term operation of the cables, they are continuously subjected to the tensile forces caused by their own weight, line tension, wind traction, and environmental temperature deformation. The built-in steel core wires bear most of the tensile load, thereby improving the overall tensile strength and structural stability of the overhead cables. This prevents problems such as overall tensile deformation and excessive line sag during installation and use, ensuring the long-term stable operation of the transmission lines.

[0004] Under long-term, complex outdoor conditions, overhead cables are constantly exposed to sunlight, rain, strong winds, and alternating hot and cold environments. Repeated tension, external disturbances, and natural aging of the material easily lead to fatigue damage in the internal steel core wires, resulting in fractures. Because the steel core wires are completely encased within the cable insulation and sheath, their condition cannot be directly observed from the outside. When a steel core wire breaks, the outer insulation sheath often remains intact, without obvious damage or cracks, making the fault highly concealed and difficult to detect from the outside immediately. Subsequent line maintenance and fault diagnosis require personnel to rely on segmented inspection and step-by-step checks to pinpoint the fracture location. This process is cumbersome and time-consuming, increasing the difficulty of line maintenance and workload, prolonging line outages, affecting the continuity and stability of regional power supply, and causing inconvenience to power maintenance work. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a high-strength overhead insulated cable to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-strength overhead insulated cable includes an outer insulating sleeve with a circular cross-section. A steel core wire is located at the center of the outer insulating sleeve and is concentrically arranged with the outer insulating sleeve. Multiple inner insulating sleeves are arranged in a ring at equal intervals outside the steel core wire. The inner insulating sleeves are arranged in a spiral shape and contain a spiral conductor. Multiple discs are installed at equal intervals inside the outer insulating sleeve. The steel core wire passes through the discs and is fixedly connected to them. The inner insulating sleeves pass through the discs and slide in cooperation with them. Multiple annular grooves are machined at equal intervals on the outer surface of the outer insulating sleeve. Rings are installed in the annular grooves. Multiple blind holes are opened at equal intervals on the annular side of the discs. The blind holes are arranged along the radial direction of the discs. A positioning pin is inserted into each blind hole. One end of the positioning pin passes through the outer insulating sleeve and contacts the inner wall of the ring in the annular groove. By equidistantly arranging multiple discs inside the outer insulation sleeve and fixing the discs to the steel core wire, the steel core wire is supported at multiple points, dispersing tension, avoiding local stress concentration, and reducing the risk of breakage caused by long-term tension, wind sway, and fatigue. The discs and the inner insulation sleeve adopt a sliding fit, which does not affect the spiral arrangement of the conductor, but also constrains the position of the inner insulation sleeve, preventing the conductor from being scattered, squeezed, or displaced. An annular groove is opened on the outside of the outer insulation sleeve and a ring is installed. With the help of positioning pins, the internal discs and the external structure are rigidly linked, so that the condition of the steel core wire can be visually reflected from the outside, solving the problem of invisible internal fractures and hidden faults in traditional cables.

[0007] Specifically, the outer surface of the ring has multiple small holes arranged in a ring at equal intervals. These small holes are concentrically arranged with the positioning pin. Between two rings, multiple tie plates are arranged in a ring at equal intervals. Each tie plate has a circular hole at both ends aligned with the small holes. A screw is inserted into the channel formed by the circular hole and the small hole, with one end of the screw threadedly connected to the positioning pin. By setting tie plates between adjacent rings and fastening them to the positioning pin with screws, an external rigid tie structure is formed between adjacent discs. When the internal steel core wire breaks, the tie plate can directly bear the cable tension, preventing the cable from sagging, pulling out, or deforming due to the broken steel core wire. This achieves the safety effect of not interrupting the cable even when the core is broken, improving the reliability of power supply under fault conditions.

[0008] Specifically, the locating pin has a threaded hole on the side near the small hole. One end of the screw passes through the round hole and the small hole in sequence and is threaded into the threaded hole. Multiple through holes are equally spaced in a ring within the annular groove. The threaded end of the locating pin is inserted into one of the through holes. The threaded hole at the end of the locating pin allows for a stable threaded connection, ensuring that the tie plate, ring, locating pin, and disc form a strong whole with high connection strength and resistance to loosening. The through holes in the annular groove provide guidance and limitation for the locating pin, preventing radial movement and ensuring the stability and reliability of the internal and external linkage structure, thus improving the accuracy of fault indication.

[0009] Specifically, one end of the locating pin with the threaded hole is machined with a first arc-shaped surface, which fits against the inner wall of the ring. The first arc-shaped surface at the end of the locating pin ensures a perfect fit with the inner wall of the ring, resulting in a large contact area and uniform force distribution.

[0010] Specifically, two symmetrically arranged ribs are installed on the side of the tie plate opposite to the outer insulation sleeve. The ribs are arranged perpendicular to each other and along the length of the tie plate, forming an integral structure with it. The integrally formed ribs on the surface of the tie plate improve its bending, tensile, and deformation resistance, making it less prone to bending and breakage when subjected to cable tension. The ribs are distributed along the length, resulting in more reasonable stress distribution and enabling it to withstand repeated loads from outdoor wind swaying and thermal expansion and contraction over a long period, thus improving the overall structural durability.

[0011] Specifically, the side of the tie plate facing the outer insulating sleeve is machined with a second arc-shaped surface, which fits into the outer surface of the outer insulating sleeve. The inner side of the tie plate also has a second arc-shaped surface that fits completely against the outer wall of the outer insulating sleeve, ensuring a tight and secure installation. The design of the second arc-shaped surface increases the contact area, making the tie plate more stable.

[0012] Specifically, a central hole is provided at the center of one side of the disc body. The inner diameter of the central hole is equal to the outer diameter of the steel core wire. The steel core wire passes through the central hole and is fixed to the disc body within the area of ​​the central hole. The central hole matching the steel core wire ensures that the steel core wire is concentrically fixed and securely connected to the disc body, preventing the steel core wire from skewing or shifting. This also ensures uniform stress distribution in the fixed area, disperses the tension in the steel core wire, further reduces the probability of fatigue fracture, and improves the overall structural strength and service life of the cable.

[0013] Specifically, the disc body has multiple spiral holes on one side, and the spiral angle of the spiral holes is the same as that of the inner insulating sleeve. The multiple spiral holes are arranged symmetrically about the central hole. The inner insulating sleeve passes through the spiral holes and slides in fit with the inner wall of the spiral holes. The spiral holes on the disc body with the spiral angle of the inner insulating sleeve allow the inner insulating sleeve to pass through smoothly and maintain its spiral shape without damaging the conductor stranding structure. The sliding fit does not restrict the normal expansion, contraction and bending of the conductor, while constraining the radial position of the conductor.

[0014] Specifically, the outer insulating sleeve is filled with insulating filler, which fills the gaps between the inner and outer insulating sleeves and between the inner insulating sleeve and the steel core wire. The disc body is disposed within the insulating filler. The insulating filler completely fills the gaps between the steel core wire, the inner insulating sleeve, and the disc body, making the internal structure dense, stable, and non-shaking. The insulating filler improves the overall insulation performance, moisture resistance, and compressive strength, while fixing the disc body's position to prevent displacement and ensuring the long-term reliability of the internal and external linkage structure.

[0015] Specifically, the depth of the annular groove is equal to the thickness of the ring, and the width of the annular groove is equal to the width of the ring. A strip-shaped slit is formed on the annular side of the ring, and the strip-shaped slit of the ring is welded. The dimensions of the annular groove perfectly match the ring, ensuring that the surface of the ring is flat, without protrusion or scratching after insertion, and does not affect cable laying, conduit insertion, or bundling. The strip-shaped slit of the ring is welded to facilitate assembly.

[0016] The beneficial effects of this invention are: By fixing the reel to the steel core wire, the steel core wire can be positioned at multiple points and subjected to segmented force inside the cable, avoiding local stress concentration and reducing the probability of the steel core wire breaking due to long-term pulling, fatigue, and vibration. This improves the overall tensile strength and service life of the cable. At the same time, the conductor is arranged in a spiral around the steel core wire, so that when the steel core wire between two adjacent reels breaks, the spiral conductor acts as a buffer, reducing the probability of the conductor being pulled apart.

[0017] The control panel is rigidly linked to the outer insulation sleeve via locating pins. A ring then restricts the position of the locating pins. When the internal steel core wire breaks, the signal is directly transmitted to the outer insulation sleeve via the locating pins, causing visible signs such as deformation, protrusion, or misalignment on the surface of the outer insulation sleeve. This allows for quick identification of the fault location without disassembly, solving the problem of concealed and undetectable steel core wire breaks in traditional cables. The evenly distributed control panels enable segmented cable monitoring. Once external deformation occurs in a segment, the status of the steel core wire within that segment can be directly identified, eliminating the need for segmented testing and step-by-step troubleshooting. This simplifies the maintenance process, shortens fault location time, and makes steel core wire breakage faults easier to detect and locate, reducing power outage maintenance time and lowering the workload and cost of line maintenance.

[0018] When the steel core wire between two adjacent coils breaks, multiple tie plates are installed between two adjacent rings, and screws are threaded through the rings and connected to the positioning pins. This completes the use of multiple tie plates to restrict the relative position of the two adjacent coils, so that the area where the steel core wire breaks is supported by multiple tie plates to bear the tensile force. There is no need to cut or reconnect the cable, making cable maintenance convenient. Attached Figure Description

[0019] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a high-strength overhead insulated cable according to the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 1 Enlarged view at point B in the middle; Figure 4 This is a cross-sectional view of a high-strength overhead insulated cable according to the present invention; Figure 5 for Figure 4 Enlarged view at point C; Figure 6 This is a schematic diagram of the assembly of the inner insulating sleeve, steel core wire, conductor and reel in a high-strength overhead insulated cable according to the present invention; Figure 7 This is an exploded structural diagram of the steel core wire, conductor, inner insulating sleeve, insulating filler and outer insulating sleeve in a high-strength overhead insulated cable of the present invention; Figure 8 This is an exploded structural diagram of the positioning pin, tie plate, and ring in a high-strength overhead insulated cable according to the present invention. Figure 9 for Figure 8 Enlarged view at point D; Figure 10 This is a perspective view of the reel body in a high-strength overhead insulated cable according to the present invention; In the diagram: 100, outer insulating sleeve; 101, insulating filler; 102, steel core wire; 103, conductor; 1031, inner insulating sleeve; 104, annular groove; 1041, through hole; 200, ring; 201, locating pin; 202, disc; 2021, blind hole; 2022, center hole; 2023, spiral hole; 203, small hole; 300, tie plate; 301, rib; 302, screw; 303, round hole. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] Please see Figures 1 to 10 This invention provides a technical solution: a high-strength overhead insulated cable, comprising an outer insulating sleeve 100 with a circular cross-section, a steel core wire 102 disposed in the center of the outer insulating sleeve 100, the steel core wire 102 being concentrically arranged with the outer insulating sleeve 100, a plurality of inner insulating sleeves 1031 arranged in a ring at equal intervals outside the steel core wire 102, the inner insulating sleeves 1031 being spirally arranged, and a spirally arranged conductor 103 disposed within the inner insulating sleeves 1031, and a plurality of discs 202 equally spaced inside the outer insulating sleeve 100, each disc 202 having a central hole 2022 at the center of one side, the inner diameter of the central hole 2022 being equal to the outer diameter of the steel core wire 102, the steel core wire 102 passing through the central hole 2022 and being located at the center. The area of ​​hole 2022 is connected and fixed to the disc body 202. Multiple spiral holes 2023 are opened on one side of the disc body 202. The spiral angle of the spiral holes 2023 is the same as the spiral angle of the inner insulating sleeve 1031. The multiple spiral holes 2023 are arranged symmetrically about the central hole 2022. The inner insulating sleeve 1031 passes through the spiral holes 2023 and slides in cooperation with the inner wall of the spiral holes 2023. With the help of the fixed connection structure between the disc body 202 and the steel core wire 102, the steel core wire 102 forms a multi-point support and segmented load-bearing force mode inside the cable, which disperses the overall tensile force and avoids excessive local stress concentration. This reduces the risk of breakage of the steel core wire 102 under long-term tension, fatigue vibration and external disturbance, and improves the overall tensile strength and service life of the cable. Meanwhile, the conductor 103 is spirally arranged around the steel core wire 102. When the steel core wire 102 between two adjacent sections of the disc 202 breaks, the spiral conductor 103 can play a buffering and stress-relieving role, absorb instantaneous tension, reduce the possibility of the conductor 103 being directly broken, and improve the safety and continuity of the cable under fault conditions.

[0022] The outer insulating sleeve 100 is filled with insulating filler 101, which fills the gap between the inner insulating sleeve 1031 and the outer insulating sleeve 100 and the gap between the inner insulating sleeve 1031 and the steel core wire 102. The disc body 202 is set inside the insulating filler 101. The insulating filler 101 filling the outer insulating sleeve 100 can fully fill the gap between the steel core wire 102, the inner insulating sleeve 1031 and the disc body 202, making the internal structure of the cable more compact, stable and free from loosening and shaking. This filling structure can improve the overall insulation strength, moisture resistance and compressive strength of the cable, and at the same time play a role in positioning and fixing the disc body 202, preventing the disc body 202 from shifting or misaligning during long-term use, and ensuring the long-term stable and reliable linkage between the internal disc body 202 and the external indicating structure.

[0023] The outer insulating sleeve 100 has multiple annular grooves 104 machined at equal intervals on its outer surface. A ring 200 is installed within each annular groove 104. The depth of the annular groove 104 is equal to the thickness of the ring 200, and the width of the annular groove 104 is equal to the width of the ring 200. A strip-shaped slit is formed on the annular side of the ring 200, and the strip-shaped slit is welded. Multiple blind holes 2021 are equally spaced on the annular side of the disc body 202. The blind holes 2021 are arranged radially along the disc body 202. A positioning pin 201 is inserted into each blind hole 2021. One end of the positioning pin 201 penetrates the outer insulating sleeve 100 and contacts the inner wall of the ring 200 within the annular groove 104. Specifically, the end of the positioning pin 201 with the threaded hole has a first arc-shaped surface, which contacts the inner wall of the ring 200. With the walls closely fitted, the disc 202 forms a stable rigid linkage structure with the outer insulation sleeve 100 through the positioning pin 201, and the ring 200 reliably limits and constrains the positioning pin 201, so that the internal force and displacement can be transmitted to the outside. When the internal steel core wire 102 breaks, loosens or displaces, its force change will be directly transmitted to the surface of the outer insulation sleeve 100 through the disc 202 and the positioning pin 201, so that the corresponding position of the outer insulation sleeve 100 shows obvious abnormal signs such as obvious deformation, local bulge, misalignment or irregular bulge. Maintenance personnel can quickly identify the steel core wire 102 breakage fault without peeling off the insulation layer or disassembling the cable, which solves the problem that the steel core wire 102 is wrapped inside the traditional overhead cable, the breakage state is hidden and cannot be judged from the outside.

[0024] With the equidistant and evenly distributed discs 202, segmented status monitoring of the entire cable can be achieved. Once external deformation occurs in a certain section, the fault location of the steel core wire 102 inside that section can be directly located. This eliminates the need for the cumbersome traditional segmented detection and step-by-step troubleshooting methods, simplifying the maintenance process and shortening the fault location time. Thanks to the advantages of easy detection, easy location, and easy judgment of steel core wire 102 fracture faults, the power outage maintenance time can be reduced, the difficulty, workload, and maintenance costs of line operation and maintenance can be reduced, and the operational reliability and emergency repair efficiency of overhead transmission lines can be improved.

[0025] The outer surface of the ring 200 has multiple small holes 203 arranged in a ring at equal intervals. The small holes 203 are concentrically arranged with the positioning pins 201. Between two rings 200, there are multiple tie plates 300 arranged in a ring at equal intervals. Both ends of the tie plates 300 have round holes 303 aligned with the small holes 203. Screws 302 are inserted into the channel formed by the round holes 303 and the small holes 203. One end of the screw 302 is threaded to the positioning pin 201. The side of the positioning pin 201 closest to the small holes 203 has a threaded hole. One end of the pin 201 passes through the round hole 303 and the small hole 203 in sequence and is threaded into the threaded hole. Multiple through holes 1041 are equally spaced in a ring shape within the annular groove 104. The threaded end of the positioning pin 201 is inserted into the through hole 1041. Two symmetrically arranged ribs 301 are installed on the side of the tie plate 300 facing away from the outer insulating sleeve 100. The ribs 301 are arranged perpendicular to the tie plate 300 and are arranged along the length of the tie plate 300. The ribs 301 and the tie plate 300 are integrally formed. 01. To improve the mechanical strength of the tie plate 300 structure, the side of the tie plate 300 facing the outer insulating sleeve 100 is machined with a second arc-shaped surface, which fits against the outer surface of the outer insulating sleeve 100. The second arc-shaped surface increases the contact area between the tie plate 300 and the outer insulating sleeve 100. When the steel core wire 102 between two adjacent discs 202 breaks, an emergency load-bearing system can be formed by multiple tie plates 300 set between adjacent rings 200. The screws 302 passing through the rings 200 and the positioning pins 201 are used to achieve fastening. The connection allows multiple tie plates 300 to jointly constrain the relative positions of two adjacent discs 202, forming a stable external tie structure. At this time, the tensile force originally borne by the steel core wire 102 can be directly and evenly borne by multiple tie plates 300, avoiding situations such as cable loosening, sagging, or tensile deformation due to the breakage of the steel core wire 102. There is no need to perform complex maintenance operations such as cutting, stripping, and reconnecting the cable, which can maintain the normal use of the cable, simplify the maintenance process, reduce the difficulty of emergency repair and construction costs, and improve the efficiency of emergency line restoration.

[0026] Working principle: Through the three-in-one structure of internal segmented support, internal and external rigid linkage, and external emergency bearing, it achieves high-strength load-bearing capacity, visual indication of steel core wire 102 breakage, and safe operation with no cable breakage even when the core is broken.

[0027] When the cable is working normally, the internal steel core wire 102 serves as the main load-bearing component. Through the equally spaced discs 202, it achieves multi-point fixation and segmented force distribution, disperses tension, avoids local stress concentration, and reduces the risk of fatigue fracture. The spiral conductor 103 and the inner insulating sleeve 1031 pass through the spiral holes 2023 on the discs 202, which can maintain the normal twisted shape and be radially constrained to prevent scattering and displacement. The insulating filler 101 fills all the internal gaps, making the overall structure dense and stable, while improving insulation, moisture resistance and pressure resistance.

[0028] Externally, the reel 202 is rigidly linked with the outer insulation sleeve 100 and the ring 200 through the positioning pin 201. The positioning pin 201 is reliably limited by the ring 200, so that the stress and displacement state of the internal steel core wire 102 can be directly transmitted to the cable surface. When the steel core wire 102 breaks or loosens due to long-term stress, its displacement change will be transmitted to the outer insulation sleeve 100 through the reel 202 and the positioning pin 201, so that the corresponding position will show intuitive and visible signs such as bulge, deformation, and misalignment. Maintenance personnel can quickly find and locate the fault section without breaking the cable, so as to realize segmented monitoring and rapid troubleshooting.

[0029] When the steel core wire 102 between two adjacent coils 202 breaks, the tensile force originally borne by the steel core wire 102 will automatically transfer to the external tie plate 300. The tie plate 300 is fastened to the ring 200 and the positioning pin 201 by screws 302, forming a rigid tie structure between the two rings 200, which firmly restricts the relative position of the adjacent coils 202, directly bears the cable tension, and prevents the cable from sagging, deforming or breaking. At this time, the cable can still be powered and operated normally without cutting or rewiring. It can be restored to use with only simple maintenance, improving the efficiency of emergency repair and the continuity of power supply.

[0030] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-strength overhead insulated cable, comprising an outer insulating sleeve (100), characterized in that: The outer insulating sleeve (100) has a circular cross-section. A steel core wire (102) is provided in the center of the outer insulating sleeve (100). The steel core wire (102) is arranged concentrically with the outer insulating sleeve (100). Multiple inner insulating sleeves (1031) are arranged in a ring at equal intervals outside the steel core wire (102). The inner insulating sleeves (1031) are arranged in a spiral shape. A spiral conductor (103) is provided inside the inner insulating sleeve (1031). Multiple disks (202) are installed at equal intervals inside the outer insulating sleeve (100). The steel core wire (102) passes through the disks (202) and is connected and fixed to the disks (202). The outer insulating sleeve (1031) penetrates the disk body (202) and slides in fit with the disk body (202). The outer surface of the outer insulating sleeve (100) is machined with multiple annular grooves (104) at equal intervals. A ring (200) is installed in the annular groove (104). Multiple blind holes (2021) are opened at equal intervals in annular on the annular side of the disk body (202). The blind holes (2021) are arranged along the radial direction of the disk body (202). A positioning pin (201) is inserted in the blind hole (2021). One end of the positioning pin (201) penetrates the outer insulating sleeve (100) and contacts the inner wall of the ring (200) in the annular groove (104).

2. The high-strength overhead insulated cable according to claim 1, characterized in that: The outer surface of the ring (200) is provided with a plurality of small holes (203) at equal intervals in an annular shape. The small holes (203) are arranged concentrically with the positioning pin (201). Between the two rings (200), there are a plurality of tie plates (300) arranged at equal intervals in an annular shape. Both ends of the tie plate (300) are provided with round holes (303) aligned with the small holes (203). Screws (302) are inserted into the channel formed by the round holes (303) and the small holes (203). One end of the screw (302) is threadedly connected to the positioning pin (201).

3. A high-strength overhead insulated cable according to claim 2, characterized in that: The locating pin (201) has a threaded hole on the side near the small hole (203). One end of the screw (302) passes through the round hole (303) and the small hole (203) in sequence and is threaded into the threaded hole. Multiple through holes (1041) are opened in a ring at equal intervals in the annular groove (104). One end of the locating pin (201) with the threaded hole is inserted into the through hole (1041).

4. A high-strength overhead insulated cable according to claim 3, characterized in that: The locating pin (201) has a first arc-shaped surface machined at one end of the threaded hole, and the first arc-shaped surface fits against the inner wall of the ring (200).

5. A high-strength overhead insulated cable according to claim 2, characterized in that: Two symmetrically arranged ribs (301) are installed on the side of the tie plate (300) away from the outer insulating sleeve (100). The ribs (301) are arranged perpendicular to each other with the tie plate (300). The ribs (301) are arranged along the length direction of the tie plate (300) and the ribs (301) and the tie plate (300) are integrally formed.

6. A high-strength overhead insulated cable according to claim 5, characterized in that: The side of the tie plate (300) facing the outer insulating sleeve (100) is processed with a second arc-shaped surface, which is in contact with the outer surface of the outer insulating sleeve (100).

7. A high-strength overhead insulated cable according to claim 1, characterized in that: A central hole (2022) is provided in the middle of one side of the disc (202). The inner diameter of the central hole (2022) is equal to the outer diameter of the steel core wire (102). The steel core wire (102) passes through the central hole (2022) and is connected and fixed to the disc (202) in the area of ​​the central hole (2022).

8. A high-strength overhead insulated cable according to claim 7, characterized in that: The disc body (202) has multiple spiral holes (2023) on one side. The spiral angle of the spiral holes (2023) is the same as that of the inner insulating sleeve (1031). The multiple spiral holes (2023) are arranged symmetrically about the central hole (2022). The inner insulating sleeve (1031) passes through the spiral holes (2023) and slides with the inner wall of the spiral holes (2023).

9. A high-strength overhead insulated cable according to claim 1, characterized in that: The outer insulating sleeve (100) is filled with insulating filler (101), which is used to fill the gap between the inner insulating sleeve (1031) and the outer insulating sleeve (100) and the gap between the inner insulating sleeve (1031) and the steel core wire (102). The disc body (202) is disposed inside the insulating filler (101).

10. A high-strength overhead insulated cable according to claim 1, characterized in that: The depth of the annular groove (104) is equal to the thickness of the ring (200), the width of the annular groove (104) is equal to the width of the ring (200), a strip-shaped slit is formed on the annular side of the ring (200), and the strip-shaped slit of the ring (200) is welded.

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