Anti-windage yaw arresting cable for power transmission and distribution line

Abstract

The utility model provides a windage yaw arresting cable for a power transmission and distribution line, which comprises two insulator strings, and umbrella skirts are arranged outside the insulator strings; the impact area is connected between the two insulator strings; the impact-resistant sheath is arranged outside the impact area in a sleeving manner; and the connecting fitting is arranged at the outer end part of the insulator chain and is used for installing the insulator chain on the power transmission tower. According to the windage yaw arresting cable for the power transmission and distribution line, the impact-resistant sheath is arranged outside the impact area, so that the impact resistance of the impact area is effectively improved, and the damage to the windage yaw arresting cable structure caused by long-term impact of a suspension insulator is reduced, so that the service life of the flexible arresting cable is prolonged, and the operation safety and reliability of the power transmission and distribution line are improved.

Description

Technical Field

[0001] This utility model relates to the field of wind deflection prevention technology for power transmission lines, and in particular to a wind deflection prevention barrier cable for power transmission and distribution lines. Background Technology

[0002] In strong winds, power lines may sway laterally due to wind force, resulting in insufficient safe distance between the conductor and the tower, potentially causing a discharge accident. Wind deflection arresting cables are devices used to prevent power line conductors from swaying and deviating from their normal position under strong winds, thus endangering the safety of the tower. They are applied in areas of transmission lines where there is a risk of wind deflection between the conductor and the tower. Wind deflection arresting cables physically restrict and prevent excessive conductor deviation, ensuring that a sufficient safe distance is always maintained between the conductor and the tower.

[0003] Patent utility model publication CN206349727U discloses a flexible arresting cable for straight towers of high-voltage overhead transmission lines. It includes an arresting cable body, which is composed of, from top to bottom, a tower extension fitting, a first flexible composite insulator with sheds, a flexible composite insulator without sheds, a second flexible composite insulator with sheds, a first connecting fitting, a cable, a second connecting fitting, a spring, and a third connecting fitting. The flexible composite insulator without sheds is the impact zone. Because no additional impact-resistant material is added to the flexible composite insulator without sheds, the flexible arresting cable suffers structural damage under long-term impact from the suspension insulator, resulting in a reduced lifespan. Utility Model Content

[0004] The technical problem this invention aims to solve is that the existing wind deflection arresting cables do not have additional impact-resistant materials added to the impact zone, which leads to structural damage to the wind deflection arresting cables under long-term impact from the suspension insulators, resulting in a decrease in the lifespan of the flexible arresting cables.

[0005] To address the aforementioned problems, this utility model provides a wind-resistant deflection arresting cable for power transmission and distribution lines, comprising: two insulator strings with awnings on the outside of the insulator strings; an impact zone connected between the two insulator strings; an impact-resistant sleeve fitted outside the impact zone; and connecting hardware provided at the outer end of the insulator strings for mounting the insulator strings on the transmission tower.

[0006] The aforementioned wind-resistant barrier cables for power transmission and distribution lines effectively improve the impact resistance of the impact zone by installing impact-resistant sheaths outside the impact zone, reduce the damage to the wind-resistant barrier cable structure caused by long-term impacts of suspension insulators, thereby extending the service life of the flexible barrier cables and improving the operational safety and reliability of power transmission and distribution lines.

[0007] To improve the cushioning performance of the impact-resistant protective sleeve, according to the above-mentioned wind deflection blocking cable of this utility model, the impact-resistant protective sleeve includes: a sleeve body, and a plurality of buffer plates provided on the inner wall of the sleeve body, the buffer plates and the inner wall of the sleeve body enclosing a buffer cavity.

[0008] Furthermore, multiple buffer cavities are arranged around the inner wall of the sheath body.

[0009] To improve the ease of installation of the impact-resistant sleeve, the impact-resistant sleeve consists of several segmented sleeve pieces.

[0010] To improve the ease of installation of the segmented impact-resistant sleeve, as an improvement to the aforementioned segmented sleeve, the sleeve pieces are assembled and installed using a plug-in structure to form an impact-resistant sleeve.

[0011] Optionally, the sheath includes a sheet body, a groove and / or a protrusion located on a first side of the sheet body, and a protrusion and / or a groove disposed on a second side opposite to the first side.

[0012] To further improve the impact resistance of the aforementioned wind deflection arresting cable, the wind deflection arresting cable according to this utility model further includes a tension buffer device installed between the insulator string and the connecting hardware.

[0013] To prevent the tension buffer device from failing, the tension buffer device further includes: a spring, a first V-shaped hook and a second V-shaped hook passing through the spring and having their openings facing each other, the opening of the V-shaped hook being hung on one side of the spring, the top of the V-shaped hook being located on the other side of the spring, the top of the first V-shaped hook being connected to a connecting hardware, and the top of the second V-shaped hook being connected to an insulator string.

[0014] To facilitate adjustment of the length of the aforementioned wind deflection arresting cable and make it suitable for different scenarios, the connecting hardware and the insulator string are connected by several PT adjustment plates, and / or the connecting hardware and the tension buffer device are connected by several PT adjustment plates.

[0015] The technical advantages of this utility model are as follows:

[0016] 1. The wind deflection blocking cable for power transmission and distribution lines of this utility model effectively improves the impact resistance of the impact zone by setting an impact-resistant sheath 3 outside the impact zone, reduces the damage to the wind deflection blocking cable structure caused by long-term impact of the suspension insulator, thereby extending the service life of the flexible blocking cable and improving the operational safety and reliability of the power transmission and distribution lines.

[0017] 2. This utility model also incorporates a buffer cavity. Compared to the impact-resistant sheath, the buffer cavity allows the impact-resistant sheath to more effectively absorb and disperse impact energy, improving the stability of the wind-deflection arresting cable when impacted. It avoids damage to the impact zone caused by localized stress concentration, thereby extending the service life of the impact zone and the entire wind-deflection arresting cable.

[0018] 3. Compared to a one-piece impact-resistant sleeve, the preferred embodiment of this invention is a segmented impact-resistant sleeve, which installers can flexibly adjust according to actual conditions. Furthermore, when a part of the impact-resistant sleeve is damaged, only the corresponding segmented sleeve piece needs to be removed and replaced, without replacing the entire impact-resistant sleeve. The segmented impact-resistant sleeve can better adapt to impact zones of different shapes and sizes. By adjusting the number and size combination of the segmented sleeve pieces, the installation requirements of various specifications of wind deflection arresting cables can be met, improving the product's versatility and applicability.

[0019] 4. To further reduce the impact of external forces such as wind deflection on the anti-wind deflection arresting cable, this invention incorporates a tension buffer device between the insulator string and the connecting hardware. Since the insulator string and connecting hardware are indirectly connected via two V-shaped hooks that compress the spring, the V-shaped hooks are continuously under tension, and the spring remains compressed. Therefore, the spring will not stretch under any circumstances, ensuring that the total length of the anti-wind deflection arresting cable does not increase, further enhancing its reliability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a wind-resistant barrier cable for power transmission and distribution lines according to an embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the impact-resistant sheath of the wind-resistant barrier cable in this embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of another impact-resistant sheath for the wind-resistant and deflection-preventing cable in this utility model embodiment;

[0023] Figure 4 This is a schematic diagram of the tension buffer device of the wind-resistant deflection arresting cable in this utility model embodiment;

[0024] Figure 5 This is a schematic diagram of the end of the wind deflection blocking cable in an embodiment of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Insulator string; 2. Impact zone; 3. Impact-resistant sheath; 4. Connecting hardware; 31. Sheath body; 32. Buffer plate; 301. Buffer cavity; 33. Sheath plate; 331. Plate body; 332. Groove; 333. Protrusion; 5. Tension buffer device; 51. Spring; 52a. First V-shaped hook; 52b. Second V-shaped hook; 6. PT adjustment plate. Detailed Implementation

[0027] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0028] like Figures 1-5 The wind-resistant barrier cable for power transmission and distribution lines provided by this utility model includes two insulator strings 1, an impact zone 2, an impact-resistant sheath 3, and connecting hardware 4. By adding an impact-resistant sheath 3 to the impact zone 2, this wind-resistant barrier cable effectively solves the problem that existing wind-resistant barrier cables lack additional impact-resistant material in the impact zone, leading to structural damage under long-term impact on the suspended insulators and a reduced lifespan of the flexible barrier cable.

[0029] like Figure 1 This illustration depicts one embodiment of the wind-deflection blocking cable for power transmission and distribution lines provided by this utility model. In this wind-deflection blocking cable, the outer surface of the insulator string 1 is provided with awnings. The awnings increase the creepage distance of the insulator string 1, improving insulation performance and effectively preventing flashover accidents caused by pollution, moisture, and other factors during the operation of the power transmission and distribution line, thus ensuring the safe and stable operation of the power transmission and distribution line. Two insulator strings 1 are arranged opposite each other, and their length, material, and other parameters can be rationally selected according to factors such as the voltage level and operating environment of the actual power transmission and distribution line. For example, in high-voltage power transmission and distribution lines, it is necessary to select insulator strings 1 with longer lengths and higher mechanical strength to ensure that they can withstand greater mechanical stress and electrical loads.

[0030] The impact zone 2, located between two insulator strings 1, is the area of ​​the anti-wind deflection cable that bears the impact force of the suspension insulators due to wind deflection. During the operation of the transmission and distribution line, the suspension insulators will impact the impact zone 2 due to factors such as wind deflection; therefore, the impact zone 2 needs to have good mechanical strength. The impact-resistant sleeve 3 is fitted over the impact zone 2, providing further protection. The impact-resistant sleeve 3 is made of highly elastic and wear-resistant silicone rubber or polymer composite materials. Silicone rubber has good flexibility and elasticity, allowing it to deform upon impact and absorb impact energy, thus protecting the impact zone 2 from direct impact damage. The impact-resistant sleeve 3 is installed in a tight fit with the impact zone 2, which can be achieved through injection molding, sleeves, etc. Preferably, a sleeve is used to fit the impact-resistant sleeve 3 over the impact zone 2. Connecting hardware 4 is located at the outer end of the insulator string 1 and is used to install the insulator string 1 on the transmission tower. The types and specifications of connecting hardware 4 are diverse, with common types including U-shaped hanging rings, ball-head hanging rings, and bowl-head hanging plates. Those skilled in the art can select appropriate connecting hardware 4 according to the structure and installation requirements of the transmission tower to ensure that the insulator string 1 can be firmly installed on the transmission tower.

[0031] When a power transmission line is affected by wind deflection, the suspension insulator will swing and impact the impact zone 2. At this time, the impact-resistant sleeve 3 absorbs the impact force. Due to its high elasticity and high wear resistance, it can absorb most of the impact energy, reducing the direct impact on the impact zone 2 and ensuring that the overall structure of the wind deflection arresting cable remains intact. Compared with existing technologies, this utility model of wind deflection arresting cable for power transmission lines effectively improves the impact resistance of the impact zone by setting the impact-resistant sleeve 3 outside the impact zone 2, reduces the damage to the wind deflection arresting cable structure caused by long-term impacts from the suspension insulator, thereby extending the service life of the flexible arresting cable and improving the operational safety and reliability of the power transmission line.

[0032] like Figure 2 Based on the above embodiment of wind-resistant barrier cable for power transmission and distribution lines, in order to further improve the impact resistance performance of the impact-resistant sheath 3, in some preferred embodiments, the impact-resistant sheath 3 adopts a buffer structure design, as follows:

[0033] The sheath body 31 is a hollow sleeve, made of highly elastic and high-strength silicone rubber. Several buffer sheets 32 are evenly distributed on the inner wall of the sheath body 31. The buffer sheets 32 have an arc-shaped structure and are arranged circumferentially along the sheath body 31. The buffer sheets 32 can be made of the same silicone rubber material as the sheath body 31, and together with the inner wall of the sheath body 31, they form multiple independent buffer cavities 301. When the impact-resistant sheath 3 is impacted, the sheath body 31 and the buffer sheets 32 undergo elastic deformation, compressing the space of the buffer cavities 301. During the deformation of the sheath body 31 and the buffer sheets 32 and the compression of the buffer cavities 301, the impact energy is gradually absorbed and dissipated. Due to the presence of the buffer cavities 301, the impact force can be more evenly distributed, avoiding damage to the impact-resistant sheath 3 and the impact zone 2 caused by localized stress concentration.

[0034] Continue to refer to Figure 2 Based on the aforementioned embodiment of wind deflection arresting cables for power transmission and distribution lines, to further enhance the impact resistance performance of the impact-resistant sheath 3, in some preferred embodiments, multiple buffer cavities 301 are arranged around the inner wall of the sheath body 31, and these buffer cavities 301 are evenly distributed circumferentially on the sheath body 31. The spacing between adjacent buffer cavities 301 is rationally designed according to the size of the impact-resistant sheath 3 and actual protection requirements.

[0035] Reference Figures 2-3 Based on the above embodiment of wind-resistant barrier cable for power transmission and distribution lines, in order to provide a more convenient, easy-to-install, maintain, and adaptable impact-resistant sheath structure for different installation scenarios, in another optional embodiment, the impact-resistant sheath 3 adopts a segmented design, as follows:

[0036] The segmented protective sleeve 33 has an overall arc-shaped sheet structure, and its curvature matches the outer surface curvature of the impact zone 2 to ensure that multiple segmented protective sleeves 33 can fit tightly against the outside of the impact zone 2 after combination. The dimensions of the segmented protective sleeve 33 are rationally designed according to the diameter and length of the impact zone 2. Adjacent segmented protective sleeves 33 are combined through a connecting structure. Common connecting structures include snap-fit ​​connections, slot connections, and bolt connections. Slot connections involve setting slots and blocks on the edges of the protective sleeves, and the connection is achieved by the blocks embedding into the slots. This connection method has good stability. Bolt connections involve setting bolt holes at the connection points of adjacent protective sleeves, and fixing the protective sleeves together with bolts and nuts (not shown in the figure).

[0037] Compared to a one-piece impact-resistant sleeve, when a portion of the segmented impact-resistant sleeve 3 is damaged, only the corresponding segmented sleeve 33 needs to be removed and replaced, eliminating the need to replace the entire impact-resistant sleeve 3. This not only saves maintenance costs but also shortens maintenance time. The segmented impact-resistant sleeve 3 can better adapt to impact zones 2 of different shapes and sizes. By adjusting the number and size combination of the segmented sleeves 33, the installation requirements of various specifications of wind deflection arresting cables can be met, improving the product's versatility.

[0038] Continue to refer to Figure 3 Based on the above-mentioned embodiment of wind deflection arresting cable for power transmission and distribution lines, in order to further improve the installation convenience and structural stability of the segmented impact-resistant sheath 3, in some embodiments, the sheath pieces 33 are assembled by plug-in structure to form the impact-resistant sheath 3.

[0039] Specifically, the sheath 33 includes a sheet body 331, which is the main body of the sheath 33. The sheet body 331 is arc-shaped, and its curvature closely matches the curvature of the outer surface of the impact area 2 to ensure a tight fit outside the impact area 2 after assembly. A groove 332 and / or a protrusion 333 are provided on the first side of the sheet body 331, and a protrusion 333 and / or a groove 332 are provided on the second side opposite to the first side. This allows adjacent sheaths 33 to be assembled through the insertion and engagement of the groove 332 and the protrusion 333. Specifically, there can be various assembly methods, such as a groove 332 on the first side and a protrusion 333 on the second side; or both a groove 332 and a protrusion 333 on the first side (partially grooved, partially protruding for staggered insertion), and corresponding protrusions 333 and grooves 332 on the second side.

[0040] The groove 332 can be designed as a rectangular, trapezoidal, or semi-circular cylinder, which facilitates the insertion and positioning of the protrusion 333. The dimensions of the groove 332 are designed according to the dimensions of the protrusion 333 to ensure a tight fit between them, preventing the sheath pieces 33 from becoming loose due to excessive gaps, nor from being too tight to be difficult to insert. The shape of the protrusion 333 is adapted to the groove 332; if the groove 332 is rectangular, the protrusion 333 is also rectangular; if the groove 332 is trapezoidal, the protrusion 333 is a corresponding trapezoid. The height of the protrusion 333 is slightly less than the depth of the groove 332 to ensure a close fit between the sheath pieces 33 after insertion.

[0041] Compared to traditional bolted or snap-fit ​​connections, the plug-in operation is more convenient, significantly reducing installation time and improving construction efficiency. During installation, no additional tools are required; the sheath pieces 33 can be assembled simply by plugging them in. The fit between the groove 332 and the protrusion 333 ensures a reliable connection between adjacent sheath pieces 33.

[0042] Reference Figures 4-5 Based on the aforementioned embodiment of wind-resistant blocking cables for power transmission and distribution lines, to further reduce the impact of external forces such as wind deflection on the insulator string 1 and the entire power transmission and distribution line system, in some embodiments, a tension buffer device 5 is installed between the insulator string 1 and the connecting hardware 4. When wind deflection or other conditions cause the insulator string 1 to be subjected to additional tension, the tension buffer device 5 can absorb and disperse this tension, preventing the tension from being directly transmitted to the connecting hardware 4 and subsequent power transmission and distribution line towers and other structures, thereby reducing the damage to line equipment caused by sudden changes in tension and improving the stability and safety of line operation.

[0043] Continue to refer to Figure 4 Based on the aforementioned embodiment of wind deflection prevention cable for power transmission and distribution lines, in order to effectively buffer the tension changes between the insulator string 1 and the connecting hardware 4 caused by external forces such as wind deflection, in some embodiments, the tension buffering device 5 includes a spring 51 and a V-shaped hook. The spring 51 is made of high-strength, high-toughness alloy spring steel. The outer and inner diameters of the spring 51 are designed according to the actual tension buffering requirements, and the inner diameter is determined according to the size of the subsequently installed V-shaped hook. The first V-shaped hook 52a and the second V-shaped hook 52b have the same structure, both being V-shaped and made of high-strength metal material. The openings of the V-shaped hooks are arranged facing each other, and the openings have a certain width to facilitate hanging on one side of the spring 51. The width of the opening is slightly larger than the wire diameter of the spring 51 to ensure that the hook can be easily hooked in and will not easily fall off. The top of the V-shaped hook is located on the other side of the spring. The top of the first V-shaped hook 52a is connected to the connecting hardware 4. The top of the second V-shaped hook 52b is connected to the insulator string 1.

[0044] When external forces such as wind deflection occur, the impact force on the anti-wind deflection arresting cable causes a sudden increase in tension. This increased tension is rapidly transmitted to the spring 51 through the second V-hook 52b. Upon being pulled by the V-hooks 52a and 52b, the spring 51 compresses, absorbing and buffering most of the increased tension through its elastic deformation. Because the insulator string and connecting hardware are indirectly compressed by the two V-hooks 52a and 52b, the V-hooks are continuously under tension, and the spring 51 remains compressed. Therefore, the spring 51 will not stretch under any circumstances, ensuring that the total length of the anti-wind deflection arresting cable does not increase and enhancing its reliability.

[0045] Reference Figure 5Based on the above-mentioned embodiment of wind deflection blocking cable for power transmission and distribution lines, in order to further optimize the line connection structure and improve the flexibility and adaptability of line adjustment, in some embodiments, the connecting hardware 4 and the insulator string 1 are connected by a number of PT adjustment plates 6, and / or the connecting hardware 4 and the tension buffer device 5 are connected by a number of PT adjustment plates 6.

[0046] The PT adjustment plate 6 is made of high-strength metal sheet. It is generally elongated and has multiple connection holes arranged in various ways, including linear and matrix arrangements. The hole diameter is designed according to the specifications of the bolts being connected. The PT adjustment plate 6 has excellent mechanical properties, capable of withstanding significant tensile and compressive forces, ensuring reliable connections. Furthermore, its multiple connection holes allow for flexible adjustments during installation to suit different wiring requirements, facilitating changes in connection length and angle.

[0047] Finally, it should be noted that, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the invention, are intended to cover non-exclusive inclusion.

[0048] In the description of the embodiments of this utility model, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0049] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0050] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wind-resistant barrier cable for power transmission and distribution lines, characterized in that, include: Two insulator strings (1), with sheds provided on the outside of the insulator strings (1); The impact zone (2) is connected between the two insulator strings (1); Impact-resistant sleeve (3) fitted outside the impact zone (2); Connection fittings (4) are provided at the outer end of the insulator string (1) for mounting the insulator string (1) on the transmission tower.

2. The wind-resistant barrier cable for power transmission and distribution lines according to claim 1, characterized in that, The impact-resistant protective sleeve (3) includes: a sleeve body (31), and a plurality of buffer pieces (32) provided on the inner wall of the sleeve body (31), wherein the buffer pieces (32) and the inner wall of the sleeve body (31) enclose a buffer cavity (301).

3. The wind-resistant barrier cable for power transmission and distribution lines according to claim 2, characterized in that, Multiple buffer cavities (301) are arranged around the inner wall of the sheath body (31).

4. The wind-resistant barrier cable for power transmission and distribution lines according to claim 1, characterized in that, The impact-resistant sheath (3) comprises: a combination of several segmented sheath pieces (33).

5. The wind-resistant barrier cable for power transmission and distribution lines according to claim 4, characterized in that, The sheath (33) is assembled by a plug-in structure to form an impact-resistant sheath (3).

6. The wind-resistant barrier cable for power transmission and distribution lines according to claim 4 or 5, characterized in that, The sheath (33) includes a sheet body (331), a groove (332) and / or a protrusion (333) located on a first side of the sheet body (331), and a protrusion (333) and / or a groove (332) disposed on a second side opposite to the first side.

7. The wind-resistant barrier cable for power transmission and distribution lines according to claim 1, characterized in that, It also includes a tension buffer device (5) disposed between the insulator string (1) and the connecting hardware (4).

8. The wind-resistant barrier cable for power transmission and distribution lines according to claim 7, characterized in that, The tension buffer device (5) includes: A spring (51), a first V-shaped hook (52a) and a second V-shaped hook (52b) passing through the spring (51) and having their openings facing each other, the openings of the V-shaped hooks being attached to one side of the spring (51), and the tops of the V-shaped hooks being located on the other side of the spring. The top of the first V-shaped hook (52a) is connected to the connecting hardware (4), and the top of the second V-shaped hook (52b) is connected to the insulator string (1).

9. The wind-resistant barrier cable for power transmission and distribution lines according to claim 7, characterized in that, The connecting fitting (4) and the insulator string (1) are connected by a plurality of PT adjustment plates (6), and / or the connecting fitting (4) and the tension buffer device (5) are connected by a plurality of PT adjustment plates (6).

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