Yoke plate, device and method for replacing adjacent triangular yoke plate side insulator

Abstract

The invention relates to the technical field of power transmission line maintenance, in particular to a yoke plate, device and method for replacing an insulator adjacent to a triangular yoke plate side, and the yoke plate comprises a first yoke plate which comprises a triangular yoke plate connecting part used for being connected with the triangular yoke plate and a clamp connecting part used for being connected with an insulator replacement clamp. The clamp connecting part comprises an end clamp connecting part and a middle clamp connecting part; the triangular yoke plate connecting part comprises two triangular yoke plate connecting holes, the end clamp connecting part is provided with an end clamp connecting hole, and the middle clamp connecting part is provided with a middle clamp connecting hole. A stable anchoring point is provided for an existing insulator replacement clamp, and the safety and portability of high-altitude operation are improved.

Description

Technical Field

[0001] This invention relates to the field of power transmission line maintenance technology, and more specifically, to a connecting plate, device, and method for replacing insulators on the adjacent delta connecting plate side. Background Technology

[0002] In transmission lines, glass insulators that have spontaneously exploded need to be replaced. When replacing glass insulators on the side adjacent to the triangular coupling plate, the operating space is limited due to the close proximity to the tower. In addition, conventional insulator replacement clamps are usually installed by bridging adjacent insulators to form a force support point. However, when replacing glass insulators on the side adjacent to the triangular coupling plate, one end lacks a stable anchor point for fixing clamps, which is not conducive to the safety and portability of high-altitude operations. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a connecting plate, device, and method for replacing insulators on the side adjacent to the delta connecting plate. Through reasonable structural and dimensional design, it provides a stable anchoring point for existing insulator replacement clamps when replacing glass insulators on the side adjacent to the delta connecting plate, thereby improving the safety and portability of high-altitude operations.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A connecting plate for replacing insulators adjacent to a delta-connector plate includes: a first connecting plate, the first connecting plate including a first connecting plate body, the first connecting plate body having a delta-connector plate connecting portion for connecting with a delta-connector plate and a clamp connecting portion for connecting with an insulator replacement clamp, the clamp connecting portion including an end clamp connecting portion and an intermediate clamp connecting portion; the delta-connector plate connecting portion including two delta-connector plate connecting holes, the end clamp connecting portion having an end clamp connecting hole, the intermediate clamp connecting portion having an intermediate clamp connecting hole; the intermediate clamp connecting hole is located on the perpendicular line of a point on the line connecting the two delta-connector plate connecting holes, the end clamp connecting hole and the intermediate clamp connecting hole are located on the same side of the line connecting the two delta-connector plate connecting holes, and a notch is provided on the other side of the two delta-connector plate connecting holes.

[0005] Through this invention, the connecting plate is stably connected to the triangular connecting plate via two triangular connecting plate connection holes in the triangular connecting plate connection part. The end clamp connection part and the middle clamp connection part provide dual anchoring points for the insulator replacement clamp, ensuring balanced force. The reasonable layout of the middle clamp connection hole, end clamp connection hole and triangular connecting plate connection hole adapts to the spatial position relationship between the insulator string and the triangular connecting plate, optimizing the force transmission path. The notch design effectively avoids the surrounding structure such as the tower body, solving the problem of limited operating space on the side adjacent to the triangular connecting plate, thereby providing a stable and reliable anchoring foundation for the existing clamp and improving the safety of high-altitude operations.

[0006] Preferably, the end clamp connecting part is provided with an end clamp connecting protrusion, and the end clamp connecting hole is located on the end clamp connecting protrusion; the intermediate clamp connecting part is provided with an intermediate clamp connecting protrusion, and the intermediate clamp connecting part is located on the intermediate clamp connecting protrusion.

[0007] Through the present invention, the protruding design of the connection at both the end clamp connection and the middle clamp connection can increase the structural thickness and stress area at their respective connection holes, avoid local stress concentration caused by the connection with the insulator replacement clamp, enhance the structural strength of the connection between the first connecting plate and the insulator replacement clamp, ensure that it is not easily deformed or damaged when subjected to loads such as unilateral force, and improve the overall load-bearing capacity of the connecting plate.

[0008] Preferably, the end clamp connecting protrusion includes a rectangular first protrusion and a second protrusion with a rounded edge, the center of the second protrusion and the center of the end clamp connecting hole are the same geometric point, and the two are concentrically arranged; the middle clamp connecting protrusion includes a triangular third protrusion and a fourth protrusion with a rounded edge, the center of the fourth protrusion and the center of the middle clamp connecting hole are the same geometric point, and the two are concentrically arranged.

[0009] Through this invention, the rectangular first protrusion of the end clamp connection and the triangular third protrusion of the middle clamp connection can be adapted to the stress characteristics of the end and middle connections respectively, ensuring connection rigidity; the second protrusion of the end clamp connection with an arc-shaped edge and the fourth protrusion of the middle clamp connection with an arc-shaped edge are concentrically set with the connection hole, which can effectively disperse the stress around the connection hole, avoid stress concentration caused by sharp corners or right angles, improve the fatigue resistance and durability of the end clamp connection and the middle clamp connection, and extend the service life of the first connecting plate.

[0010] Preferably, the notch is an isosceles triangle whose vertex does not exceed the line connecting the two triangular connecting holes.

[0011] By using this invention, the notch is set as a symmetrical structure of an isosceles triangle, which ensures that the first connecting plate is subjected to balanced forces and avoids local strength reduction caused by the notch design. The apex angle of the notch shape is limited to the line connecting the two triangular connecting plate holes, so that while avoiding the tower structure, it can retain enough material for the triangular connecting plate connection part and ensure the overall rigidity of the triangular connecting plate connection part, which can adapt to the operation requirements of the narrow space on the side of the adjacent triangular connecting plate.

[0012] Preferably, the end clamp connecting part, the intermediate clamp connecting part and the insulator replacement clamp are respectively connected by a second connecting plate. One end of the second connecting plate is provided with a connecting plate connecting hole corresponding to the end clamp connecting hole or the intermediate clamp connecting hole, and the other end of the second connecting plate is provided with a clamp connecting hole for connecting with the clamp.

[0013] Through this invention, the second connecting plate serves as a transitional connector between the first connecting plate and the insulator replacement clamp. It precisely aligns with the first connecting plate via connecting holes and flexibly adapts to the insulator replacement clamp via clamp connecting holes. The design of the second connecting plate solves potential size mismatch issues that may arise when the first connecting plate and the insulator replacement clamp are directly connected. Furthermore, by connecting the end clamp connecting part and the middle clamp connecting part to the insulator replacement clamps on both sides of the insulator string via two second connecting plates, stress interference or additional torque caused by the insulator replacement clamps on both sides of the insulator string directly acting on the first connecting plate can be effectively eliminated. This ensures that the load on both sides is independently and stably transmitted to the triangular connecting plate along a preset path. Therefore, the use of the second connecting plate not only improves the overall stress balance of the first connecting plate but also enhances the compatibility of the overall device with insulator replacement clamps of different specifications by using it as a standardized transition structure. This significantly simplifies the installation and commissioning process during high-altitude operations and further improves operational convenience.

[0014] Preferably, the line connecting the end clamp connection hole and the middle clamp connection hole is parallel to the line connecting the two triangular connecting plate connection holes.

[0015] By means of this invention, the line connecting the end clamp connection hole and the middle clamp connection hole is set to be parallel to the line connecting the two triangular connecting plate connection holes, so that the tension transmitted by the insulator replacement clamps on both sides of the insulator string to the first connecting plate is consistent with the load direction borne by the triangular connecting plate, thereby reducing the additional torque in the force transmission process and reducing the torsional stress of the first connecting plate caused by the deviation of the force direction.

[0016] The present invention also provides an apparatus for replacing insulators on the side adjacent to the delta-connector plate, comprising the aforementioned connecting plate for replacing insulators on the side adjacent to the delta-connector plate, comprising two first connecting plates, the two first connecting plates fixing the delta-connector plate in a clamping state, the delta-connector plate being located between the two first connecting plates; the first connecting plates are connected to one end of insulator replacement clamps located on both sides of the insulator string via two second connecting plates, and the other ends of the insulator replacement clamps on both sides of the insulator string are respectively connected to both ends of the insulator replacement clamps.

[0017] This invention utilizes a symmetrical force-bearing structure formed by two first connecting plates clamping a triangular connecting plate. This evenly distributes the load transmitted from the insulator replacement clamps on both sides of the insulator string to the first connecting plate, effectively preventing plastic deformation of the triangular connecting plate due to concentrated force on one side. Simultaneously, the first connecting plate is connected to the insulator replacement clamps on both sides of the insulator string via a second connecting plate. The other ends of the insulator replacement clamps on both sides of the insulator string are connected to the insulator replacement fixtures, forming a closed force-bearing system. This system can stably bear the tension of the entire insulator string containing the insulator string to be replaced, as well as the tension of other insulator strings outside the system. This ensures that the insulator string remains taut during the insulator replacement process without any risk of slack or falling, significantly improving the safety and structural reliability of high-altitude operations in the confined space adjacent to the triangular connecting plate.

[0018] Preferably, the triangular connecting plate connection part also includes two first connecting bolts, which are used to connect the two first connecting plates and the triangular connecting plate by engaging with the two connecting holes of the two first connecting bolts; The end clamp connecting part and the intermediate clamp connecting part each include a second connecting bolt. The second connecting bolt is engaged with the connecting hole of the connecting plate and the connecting hole of the end clamp, or the second connecting bolt is engaged with the connecting hole of the connecting plate and the connecting hole of the intermediate clamp, to connect the second connecting plate to the end clamp connecting part or the intermediate clamp connecting part.

[0019] Through this invention, the first connecting bolt satisfies the connection requirements between the triangular connecting plate and the first connecting plate, ensuring a safe connection between the two; the second connecting bolt satisfies the connection requirements between the end clamp connecting part and the middle clamp connecting part and the second connecting plate respectively, adapting to the connection loads of the insulator replacement clamps on both sides of the insulator string and the second connecting plate respectively. Due to the detachable nature of the bolt connection, it ensures that while meeting the connection strength requirements of the overall device, it is easy to install and disassemble, improving the portability of high-altitude operations.

[0020] The present invention also provides a method for replacing insulators on the side adjacent to a delta-connector plate, which is based on the above-mentioned device for replacing insulators on the side adjacent to a delta-connector plate, and specifically includes the following steps: Step 1: Fix the triangular connecting plate in a clamped state between the two first connecting plates. Use two first connecting bolts to connect the two first connecting plates and the triangular connecting plate. Use two second connecting bolts to connect the two second connecting plates to the end clamp connecting part or the middle clamp connecting part respectively. Step 2: Install insulators and replace clamps; Step 3: Install the insulator replacement clamps on both sides of the insulator string including the insulator to be replaced. Connect one end of the insulator replacement clamps on both sides of the insulator string to the two second connecting plates respectively, and connect the other end of the insulator replacement clamps on both sides of the insulator string to the two ends of the insulator replacement clamp respectively. Step 4: Replace the insulator to be replaced with a new insulator; Step 5: Remove the insulator replacement clamp, insulator replacement clip, second connecting plate, and first connecting plate in sequence.

[0021] This invention addresses the problems of limited operating space, unstable anchoring points leading to high operational risks, and chaotic processes when replacing insulators on the adjacent triangular connecting plate side in existing technologies. The improvement lies in the following steps: First, the anchoring point is fixed, and then the force-bearing system is built. Within the limited operating space, two first connecting plates clamp the triangular connecting plate to form a reliable anchor, solving the problem of traditional insulator replacement methods lacking a stable force-bearing foundation when replacing insulators on the adjacent triangular connecting plate side, which relies on adjacent insulators as fulcrums. The force-bearing system is gradually built by installing the second connecting plate, the insulator replacement clamps on both sides of the insulator string, and the insulator replacement clamps in stages, ensuring the accurate positioning of each component during assembly. During the insulator replacement stage, the closed force-bearing system formed by the first connecting plate, the second connecting plate, the insulator replacement clamps, and the insulator replacement clamps provides stable tension control during the replacement process, safely isolating the insulator to be replaced from the overall insulator string to ensure stable replacement. After the replacement of the insulator is completed, the device is dismantled in reverse order, adhering to the "unload force before dismantling" operating procedure, reducing the risk of high-altitude component falls.

[0022] This method eliminates the need to modify existing line fittings and adapts to confined replacement work spaces through standardized procedures. It not only makes the operation process more standardized but also effectively shortens the replacement time of insulators and significantly improves the safety and efficiency of insulator replacement near the delta plate. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first connecting plate used for replacing the insulator on the adjacent delta connecting plate side in this embodiment.

[0024] Figure 2 This is a schematic diagram of the second connecting plate used for replacing the insulator on the adjacent delta connecting plate side in this embodiment.

[0025] Figure 3 This is a schematic diagram of the device for replacing the insulator on the side adjacent to the delta plate in this embodiment.

[0026] Figure 4 This is a schematic diagram showing the dimensions of the first connecting plate used for replacing the insulator on the adjacent delta connecting plate side in this embodiment. Detailed Implementation

[0027] To further understand the content of this invention, the invention will be described in detail with reference to the embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0028] Example 1 like Figure 1-2 As shown, this embodiment provides a connecting plate for replacing insulators adjacent to the delta connecting plate side, which includes: a first connecting plate 100, the first connecting plate 100 including a first connecting plate body, the first connecting plate body having a delta connecting plate connecting part 110 for connecting with a delta connecting plate 310 and a clamp connecting part for connecting with an insulator replacement clamp 320, the clamp connecting part including an end clamp connecting part 120 and an intermediate clamp connecting part 130; the delta connecting plate connecting part 110 includes two delta connecting plate connecting holes 111, the end clamp connecting part 120 has an end clamp connecting hole 121, the intermediate clamp connecting part 130 has an intermediate clamp connecting hole 131; the intermediate clamp connecting hole 131 is located on the perpendicular line of a point on the line connecting the two delta connecting plate connecting holes 111, the end clamp connecting hole 121 and the intermediate clamp connecting hole 131 are located on the same side of the line connecting the two delta connecting plate connecting holes 111, and a notch 112 is provided on the other side of the two delta connecting plate connecting holes 111.

[0029] In this embodiment, the connecting plate is stably connected to the triangular connecting plate 310 via the two triangular connecting plate connecting holes 111 of the triangular connecting plate connecting part 110. The end clamp connecting part 120 and the middle clamp connecting part 130 provide dual anchoring points for the insulator replacement clamp 320, ensuring balanced force. The reasonable layout of the middle clamp connecting hole 131, the end clamp connecting hole 121 and the triangular connecting plate connecting hole 111 adapts to the spatial positional relationship between the insulator string 330 and the triangular connecting plate 310, optimizing the force transmission path. The design of the notch 112 effectively avoids the surrounding structure such as the tower body, solving the problem of limited operating space on the side adjacent to the triangular connecting plate 310, thereby providing a stable and reliable anchoring foundation for the existing clamp and improving the safety of high-altitude operations.

[0030] In this embodiment, the end clamp connecting part 120 is provided with an end clamp connecting protrusion, and the end clamp connecting hole 121 is located on the end clamp connecting protrusion. The intermediate clamp connecting part 130 is provided with an intermediate clamp connecting protrusion, and the intermediate clamp connecting part 130 is located on the intermediate clamp connecting protrusion.

[0031] In this embodiment, the protruding connection design at the end clamp connection 120 and the middle clamp connection 130 increases the structural thickness and stress area at their respective connection holes, avoids local stress concentration caused by the connection with the insulator replacement clamp 320, enhances the structural strength of the connection between the first connecting plate 100 and the insulator replacement clamp 320, ensures that it is not easily deformed or damaged when subjected to loads such as unilateral force, and improves the overall load-bearing capacity of the connecting plate.

[0032] In this embodiment, the end clamp connecting protrusion includes a rectangular first protrusion and a second protrusion with an arc-shaped edge. The center of the second protrusion and the center of the end clamp connecting hole 121 are at the same geometric point and are concentrically arranged. The middle clamp connecting protrusion includes a triangular third protrusion and a fourth protrusion with an arc-shaped edge. The center of the fourth protrusion and the center of the middle clamp connecting hole 131 are at the same geometric point and are concentrically arranged.

[0033] In this embodiment, the rectangular first protrusion of the end clamp connection 120 and the triangular third protrusion of the intermediate clamp connection 130 can be adapted to the stress characteristics of the end and intermediate connections respectively, ensuring connection rigidity; the second protrusion of the end clamp connection 120 with an arc-shaped edge and the fourth protrusion of the intermediate clamp connection 130 with an arc-shaped edge are concentrically set with the connection hole, which can effectively disperse the stress around the connection hole, avoid stress concentration caused by sharp corners or right angles, improve the fatigue resistance and durability of the end clamp connection 120 and the intermediate clamp connection 130, and extend the service life of the first connecting plate 100.

[0034] In this embodiment, the notch 112 is an isosceles triangle whose vertex does not exceed the line connecting the two triangular connecting holes 111.

[0035] In this embodiment, the notch 112 is set as a symmetrical structure of an isosceles triangle to ensure that the first connecting plate 100 is subjected to balanced forces and to avoid local strength weakening caused by the design of the notch 112. The apex angle of the notch 112 shape is limited to the line connecting the two triangular connecting plate holes 111, so that while avoiding the tower structure, it can retain sufficient material for the triangular connecting plate connecting part 110 and ensure the overall rigidity of the triangular connecting plate connecting part 110, which can adapt to the operation requirements of the narrow space adjacent to the triangular connecting plate 310.

[0036] In this embodiment, the end clamp connecting part 120, the intermediate clamp connecting part 130 and the insulator replacement clamp 320 are respectively connected by a second connecting plate 200. One end of the second connecting plate 200 is provided with a connecting plate connecting hole 210 corresponding to the end clamp connecting hole 121 or the intermediate clamp connecting hole 131, and the other end of the second connecting plate 200 is provided with a clamp connecting hole 220 for connecting with the clamp.

[0037] In this embodiment, the second connecting plate 200 serves as a transitional connector between the first connecting plate 100 and the insulator replacement clamp 320. It precisely aligns with the first connecting plate 100 via the connecting plate connection hole 210 and flexibly adapts to the insulator replacement clamp 320 via the clamp connection hole 220. The design of the second connecting plate 200 solves the potential size mismatch problem when the first connecting plate 100 and the insulator replacement clamp 320 are directly connected. Furthermore, by connecting the end clamp connection part 120 and the middle clamp connection part 130 to the insulator replacement clamps 320 on both sides of the insulator string 330 via the two second connecting plates 200, the mutual stress interference or additional torque generated by the insulator replacement clamps 320 on both sides of the insulator string 330 acting directly on the first connecting plate 100 can be effectively eliminated, ensuring that the load on both sides is independently and stably transmitted to the triangular connecting plate 310 along a preset path. Therefore, by using the second connecting plate 200, not only is the overall stress balance of the first connecting plate 100 improved, but also the overall device's compatibility with insulator replacement clamps 320 of different specifications is enhanced by using it as a standardized transition structure, which greatly simplifies the installation and commissioning process in high-altitude operations and further improves the ease of operation.

[0038] In this embodiment, the line connecting the end clamp connection hole 121 and the middle clamp connection hole 131 is parallel to the line connecting the two triangular connecting plate connection holes 111.

[0039] In this embodiment, the line connecting the end clamp connection hole 121 and the middle clamp connection hole 131 is set to be parallel to the line connecting the two triangular connecting plate connection holes 111. This makes the tension transmitted from the insulator replacement clamps 320 on both sides of the insulator string 330 to the first connecting plate 100 consistent with the load direction borne by the triangular connecting plate 310, reducing the additional torque in the force transmission process and reducing the torsional stress of the first connecting plate 100 caused by the deviation of the force direction.

[0040] Example 2 like Figure 3 As shown, this embodiment provides a device for replacing insulators on the side adjacent to the delta plate. It includes a first connecting plate 100 and a second connecting plate 200 as described in Embodiment 1. Specifically, it includes two first connecting plates 100, which clamp a delta connecting plate 310 between them. The first connecting plates 100 are connected to one end of an insulator replacement clamp 320 located on both sides of the insulator string 330 via the two second connecting plates 200. The other ends of the insulator replacement clamps 320 on both sides of the insulator string 330 are connected to both ends of an insulator replacement clamp 340.

[0041] In this embodiment, a symmetrical force-bearing structure is formed by two first connecting plates 100 clamping a triangular connecting plate 310. This evenly distributes the load transmitted from the insulator replacement clamps 320 on both sides of the insulator string 330 to the first connecting plate 100, effectively preventing plastic deformation of the triangular connecting plate 310 due to concentrated force on one side. At the same time, the first connecting plate 100 is connected to the insulator replacement clamps 320 on both sides of the insulator string 330 through the second connecting plate 200. The other ends of the insulator replacement clamps 320 on both sides of the insulator string 330 are respectively connected to the insulator replacement clamps 340, forming a closed force-bearing system. This system can stably bear the tension of the insulator string to be replaced, the overall insulator string, and other insulator strings outside the system. This ensures that the insulator string is always taut during the insulator replacement process without any risk of slack or falling, significantly improving the safety and structural reliability of high-altitude operations in the confined space adjacent to the triangular connecting plate 310.

[0042] In this embodiment, the triangular connecting plate connecting part 110 further includes two first connecting bolts, which cooperate with the two triangular connecting plate connecting holes 111 to connect the two first connecting plates 100 and the triangular connecting plate 310. The end clamp connecting part 120 and the intermediate clamp connecting part 130 each include a second connecting bolt. The second connecting bolt engages with the connecting plate connecting hole 210 and the end clamp connecting hole 121, or engages with the connecting plate connecting hole 210 and the intermediate clamp connecting hole 131, to connect the second connecting plate 200 to the end clamp connecting part 120 or the intermediate clamp connecting part 130.

[0043] In this embodiment, the first connecting bolt satisfies the connection requirements between the triangular connecting plate 310 and the first connecting plate 100, ensuring a safe connection between them. The second connecting bolt satisfies the connection requirements between the end clamp connecting part 120 and the middle clamp connecting part 130 and the second connecting plate 200, respectively, and adapts to the connection loads of the insulator replacement clamps 320 on both sides of the insulator string 330 and the second connecting plate 200. Due to the detachable nature of the bolt connection, it ensures that the overall connection strength of the device meets the requirements while facilitating installation and disassembly, thus improving the portability of high-altitude operations.

[0044] Example 3 This embodiment provides a method for replacing insulators on the side adjacent to the delta-joint plate, which is based on the device of Embodiment 2 and specifically includes the following steps: Step 1: Fix the triangular connecting plate 310 in a clamping state between the two first connecting plates 100. The triangular connecting plate 310 is located between the two first connecting plates 100. Use two first connecting bolts to connect the two first connecting plates 100 and the triangular connecting plate 310. Use two second connecting bolts to connect the two second connecting plates 200 to the end clamp connecting part 120 or the middle clamp connecting part 130 respectively. Step 2: Install insulators and replace clamp 340; Step 3: Install the insulator replacement clamp 320 on both sides of the insulator string 330 including the insulator to be replaced, connect one end of the insulator replacement clamp 320 on both sides of the insulator string 330 to the two second connecting plates 200 respectively, and connect the other end of the insulator replacement clamp 320 on both sides of the insulator string 330 to both ends of the insulator replacement clamp 340 respectively. Step 4: Replace the insulator to be replaced with a new insulator; Step 5: Sequentially remove the insulator replacement clamp 320, the insulator replacement clip 340, the second connecting plate 200, and the first connecting plate 100.

[0045] This embodiment addresses the problems of limited operating space, unstable anchoring points leading to high operational risks, and chaotic processes when replacing insulators on the adjacent triangular connecting plate side in the existing technology. Improvements are made by first fixing the anchoring points and then constructing the load-bearing system. Within the limited operating space, two first connecting plates 100 are used to clamp the triangular connecting plate 310 to form a reliable anchor, solving the problem of traditional insulator replacement methods lacking a stable load-bearing foundation when replacing insulators on the adjacent triangular connecting plate side, which relies on adjacent insulators as fulcrums. Further improvements are made by installing the second connecting plate 200 and the insulator replacement clamps 32 on both sides of the insulator string 330 in stages. The system, consisting of 0 and insulator replacement clamp 340, gradually establishes a force-bearing system to ensure the accurate positioning of each component during assembly. During the insulator replacement phase, the closed force-bearing system formed by the first connecting plate 100, the second connecting plate 200, the insulator replacement clamp 320, and the insulator replacement clamp 340 ensures stable tension control during insulator replacement and safely isolates the insulator to be replaced from the overall insulator string to ensure stable replacement of the insulator. After the work of replacing the insulator is completed, the device is dismantled in reverse order, following the operating procedure of "relieving stress before dismantling parts," which reduces the risk of high-altitude component falls.

[0046] This method eliminates the need to modify existing line fittings and adapts to confined replacement work spaces through standardized procedures. It not only makes the operation process more standardized but also effectively shortens the replacement time of insulators and significantly improves the safety and efficiency of insulator replacement near the delta plate.

[0047] Example 4 This embodiment provides a connecting plate for replacing insulators adjacent to the delta connecting plate side, which is made of 20mm thick high-strength steel plate with a design strength of 420MPa. The delta connecting plate connection part 110 of the first connecting plate 100 has two delta connecting plate connection holes 111 with a diameter of 38mm, and the hole spacing is adapted to the installation size of the delta connecting plate 310; the end clamp connection hole 121 and the middle clamp connection hole 131 are both 32mm in diameter, and their connecting line is parallel to the connecting line of the delta connecting plate connection holes 111, and the spacing is designed according to the tension transmission requirements of the insulator string 330; the notch 112 is in the shape of an isosceles triangle, and the depth ensures that it avoids the tower structure and does not weaken the connection strength.

[0048] Optionally, in this embodiment, the center distance between the two triangular connecting plate holes 111 is 240mm, the center distance between the end clamp connecting hole 121 and the middle clamp connecting hole 131 is 540mm, the distance between the line connecting them and the line connecting the triangular connecting plate holes 111 is 175mm, and the notch 112 is an isosceles triangle with a base length of 320mm and a height of 50mm.

[0049] In this embodiment, the high-strength steel plate material and reasonable hole design ensure that the first connecting plate 100 has a bending safety factor of 3.8 and a shear safety factor of 2, and can stably withstand the force of a single porcelain insulator of 180kN; the notch 112 design effectively solves the problem of limited space, and the double connecting hole layout realizes the balanced transfer of load.

[0050] In this embodiment, the first protrusion of the end clamp connection of the end clamp connection part 120 is a rectangle of 100mm×115mm, and the second protrusion is an arc with a radius of 50mm. The arc is concentric with the end clamp connection hole 121. The third protrusion of the middle clamp connection of the middle clamp connection part 130 is a triangle with one side parallel to the line connecting the triangle connecting plate connection hole 111 and a length of 445mm. The fourth protrusion is an arc with a radius of 50mm, and the arc is concentric with the middle clamp connection hole 131.

[0051] In this embodiment, the rectangular and triangular protrusions enhance the rigidity of the connection part, and the rounded edges reduce the stress around the hole. Combined with the strength characteristics of the steel, the fatigue resistance of the first connecting plate 100 is significantly improved.

[0052] like Figure 4 As shown, the first connecting plate 100 has dimensions of 825×150×20mm to meet the above dimensional requirements, that is, the side length near the end clamp connecting hole 121 is 265mm, and the overall length is 825mm.

[0053] In this embodiment, the second connecting plate 200 has dimensions of 160×80×20mm, the diameter of the connecting plate connecting hole 210 is 32mm, the diameter of the clamp connecting hole 220 is 24mm, and the hole spacing is 80mm. This is to meet the connection requirements of the first connecting plate 100 and the insulator replacement clamps 320 on both sides of the insulator string 330. The edges at both ends of the second connecting plate 200 are set as arcs with a diameter of 40mm that are concentric with the connecting plate connecting hole 210 and the clamp connecting hole 220, respectively.

[0054] In this embodiment, the compact size of the second connecting plate 200 facilitates installation in confined spaces, and the precise hole positions ensure seamless connection with the first connecting plate 100 and the insulator replacement clamps 320 on both sides of the insulator string 330, resulting in uniform stress distribution when transferring loads.

[0055] In this embodiment, the end clamp connecting part 120 and the middle clamp connecting part 130 are respectively connected to the insulator replacement clamps 320 on both sides of the insulator string 330 through the second connecting plate 200. The connecting plate connecting hole 210 and the end clamp connecting hole 121 and the middle clamp connecting hole 131 are all rigidly connected by bolts.

[0056] In this embodiment, the independent connection design of the double second connecting plates 200 ensures that the insulator replacement clamps 320 on both sides of the insulator string 330 do not interfere with each other under force, and the rigidity of the bolt connection ensures high force transmission efficiency and avoids load loss caused by flexible connection.

[0057] In this embodiment, the device for replacing the insulator on the side adjacent to the delta plate uses two first connecting plates 100 to symmetrically clamp the delta plate 310. The insulator replacement clamp 340 spans both sides of the insulator to be replaced, forming a closed force ring with the insulator replacement clamps 320 on both sides of the insulator string 330.

[0058] In this embodiment, the first connecting bolt is an 8.8 grade M36 bolt with a smooth rod length of 65-72mm and an installation torque of 800-850N・m; the second connecting bolt is a 6.8 grade M30 bolt with a smooth rod length of 65-72mm and an installation torque of 500-550N・m.

[0059] Specifically, the stress calculation for the first connecting plate 100 in this embodiment is as follows: In this embodiment, the single-strand insulator string bears one-quarter of the tension of the six sub-conductors. The average force of a single sub-conductor is 85kN, which is calculated as 120kN here. The single-strand insulator string bears a force of 180kN, and the clamp bears a force of 90kN on one side. The first connecting plate 100 is set as two plates in two layers, both of which are made of 20mm thick high-strength steel plates. The design strength of the steel is not less than 420Mpa.

[0060] 1. Bending resistance calculation for the first connecting plate 100mm: Given that the maximum bending moment is 85.5 kN*m and the section height at the point of maximum bending moment is 265 mm, , Considering an imbalance factor of 1.2, the bending resistance of the connecting plate has a safety factor of 3.8.

[0061] 2. Shear strength verification of the first connecting plate 100: Given that the shear forces at the two points of abrupt change in shear force are 332.75 / 2 = 166.375 kN and 153.57 / 2 = 76.78 kN respectively, At the first shear plane:

[0062] At the second shear plane: , Considering an unbalance factor of 1.2, the shear resistance of the connecting plate has a safety factor of 2.

[0063] 3. Shear strength verification of the first and second connecting bolts: Assuming the first connecting bolt is an M366.8 grade bolt with a design strength of 480 MPa, a shear strength of 336 MPa, and a maximum shear force of 332.75 kN, the calculation is performed based on a single shear plane: , The safety margin is small, so we consider using grade 8.8 bolts; Assuming the second connecting bolt is an M306.8 grade bolt with a design strength of 480 MPa, a shear strength of 336 MPa, and a maximum shear force of 90 kN: , The shear strength of the second connecting bolt meets the application requirements.

[0064] 3. Tensile and shear strength checks for the second connecting plate 200:

[0065] 1. Tensile strength calculation: Given a tensile force of 90kN, perform a calculation at the weakest point of the bolt hole: , The tensile strength of the second connecting plate 200 meets the application requirements.

[0066] 2. Shear resistance check, given shear force 90kN: , The shear resistance of the second connecting plate 200 meets the application requirements.

[0067] It is readily understood that those skilled in the art can combine, split, or reorganize the embodiments provided in this application to obtain other embodiments, all of which do not exceed the protection scope of this application.

[0068] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the embodiments shown are only part of the embodiments of the present invention. The actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A connecting plate for replacing insulators adjacent to a delta connecting plate, comprising: The first connecting plate (100) includes a first connecting plate body. The first connecting plate body is provided with a triangular connecting plate connecting part (110) for connecting with a triangular connecting plate (310) and a clamp connecting part for connecting with an insulator replacement clamp (320). The clamp connecting part includes an end clamp connecting part (120) and an intermediate clamp connecting part (130). The triangular connecting plate connecting part (110) includes two triangular connecting plate connecting holes (111). The end clamp connecting part (120) is provided with an end clamp connecting hole (121), and the intermediate clamp connecting part (130) is provided with an intermediate clamp connecting hole (131). The intermediate clamp connecting hole (131) is located on the perpendicular line of a point on the line connecting the two triangular connecting plate connecting holes (111). The end clamp connecting hole (121) and the intermediate clamp connecting hole (131) are located on the same side of the line connecting the two triangular connecting plate connecting holes (111). A notch (112) is provided on the other side of the two triangular connecting plate connecting holes (111).

2. A connecting plate for replacing insulators adjacent to the delta connecting plate side according to claim 1, wherein: The end clamp connecting part (120) is provided with an end clamp connecting protrusion, and the end clamp connecting hole (121) is located on the end clamp connecting protrusion. The intermediate clamp connecting part (130) is provided with an intermediate clamp connecting protrusion, and the intermediate clamp connecting part (130) is located on the intermediate clamp connecting protrusion.

3. A connecting plate for replacing insulators adjacent to the delta connecting plate side according to claim 2, wherein: The end clamp connecting protrusion includes a first rectangular protrusion and a second protrusion with a rounded edge. The center of the second protrusion and the center of the end clamp connecting hole (121) are the same geometric point, and the two are concentrically set. The middle clamp connecting protrusion includes a third triangular protrusion and a fourth protrusion with a rounded edge. The center of the fourth protrusion and the center of the middle clamp connecting hole (131) are the same geometric point, and the two are concentrically set.

4. A connecting plate for replacing insulators adjacent to the delta connecting plate side according to claim 1, wherein: The notch (112) is an isosceles triangle whose vertex does not exceed the line connecting the two triangular connecting holes (111).

5. A connecting plate for replacing insulators adjacent to the delta connecting plate side according to claim 1, wherein: The end clamp connecting part (120), the intermediate clamp connecting part (130) and the insulator replacement clamp (320) are respectively connected by a second connecting plate (200). One end of the second connecting plate (200) is provided with a connecting plate connecting hole (210) corresponding to the end clamp connecting hole (121) or the intermediate clamp connecting hole (131), and the other end of the second connecting plate (200) is provided with a clamp connecting hole (220) for connecting with the clamp.

6. A connecting plate for replacing insulators adjacent to the delta connecting plate side according to claim 1, wherein: The line connecting the end clamp connection hole (121) and the middle clamp connection hole (131) is parallel to the line connecting the two triangular connecting plate connection holes (111).

7. An apparatus for replacing insulators adjacent to a delta-connector plate, comprising a connecting plate as described in claims 1-6 for replacing insulators adjacent to a delta-connector plate, characterized in that: It includes two first connecting plates (100), which clamp a triangular connecting plate (310) in a clamping state. The triangular connecting plate (310) is located between the two first connecting plates (100). The first connecting plate (100) is connected to one end of the insulator replacement clamp (320) located on both sides of the insulator string (330) through two second connecting plates (200). The other end of the insulator replacement clamp (320) on both sides of the insulator string (330) is connected to both ends of the insulator replacement clamp (340).

8. The device for replacing insulators adjacent to the delta-joint plate side according to claim 7, comprising: The triangular connecting plate connecting part (110) also includes two first connecting bolts, which cooperate with the two triangular connecting plate connecting holes (111) to connect the two first connecting plates (100) and the triangular connecting plate (310); The end clamp connecting part (120) and the intermediate clamp connecting part (130) each include a second connecting bolt. The second connecting bolt is engaged with the connecting plate connecting hole (210) and the end clamp connecting hole (121), or the second connecting bolt is engaged with the connecting plate connecting hole (210) and the intermediate clamp connecting hole (131) to connect the second connecting plate (200) to the end clamp connecting part (120) or the intermediate clamp connecting part (130).

9. A method for replacing insulators on the side adjacent to a delta-joint plate, characterized in that: Based on the device for replacing the insulator on the side adjacent to the delta plate as described in claims 7-8; Specifically, it includes the following steps: Step 1: Fix the triangular connecting plate (310) in a clamping state between the two first connecting plates (100), with the triangular connecting plate (310) located between the two first connecting plates (100). Use two first connecting bolts to connect the two first connecting plates (100) and the triangular connecting plate (310). Use two second connecting bolts to connect the two second connecting plates (200) to the end clamp connecting part (120) or the middle clamp connecting part (130) respectively. Step 2: Install insulator replacement clamp (340); Step 3: Install the insulator replacement clamp (320) on both sides of the insulator string (330) including the insulator to be replaced, connect one end of the insulator replacement clamp (320) on both sides of the insulator string (330) to the two second connecting plates (200) respectively, and connect the other end of the insulator replacement clamp (320) on both sides of the insulator string (330) to the two ends of the insulator replacement clamp (340) respectively; Step 4: Replace the insulator to be replaced with a new insulator; Step 5: Remove the insulator replacement clamp (320), insulator replacement clip (340), second connecting plate (200) and first connecting plate (100) in sequence.

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