Lightning arrester mounting structure, lightning arrester and live replacement tool

Abstract

The invention relates to a tool capable of quickly replacing a plateau type self-adaptive lightning arrester in an electrified manner, and belongs to the field of electrified maintenance of power equipment. The tool comprises a handle, a fork disc, a positioning column and a limiting fork arm, one side of the fork disc is connected with the handle, the other side of the fork disc is provided with the positioning column with a built-in magnet, and the positioning column can be automatically aligned with a ferromagnetic positioning hole in the lower end of the lightning arrester under the action of magnetic attraction. At least three adjustable limiting fork arms are arranged in the circumferential direction of the fork disc, the diameter of an envelope circle of the limiting fork arms is larger than the outer diameter of a lightning arrester body, and two operation states of loading and unloading are achieved through adjusting holes and threaded fasteners. In the assembling process, the limiting fork arm makes contact with the fixing base to form limiting, and fixing is completed after the spring clamping tongue enters the clamping ring groove and rebounds. During disassembly, the movable ring pushes the spring clamping tongue to be separated, so that safe separation of the lightning arrester is realized. According to the tool, the plateau type lightning arrester can be quickly disassembled and assembled in a non-power-off state, the maintenance-free and safe operation requirements of a 10kV overhead line are met, and the tool has very high practical value and popularization significance.

Description

Technical Field

[0001] This invention belongs to the field of power equipment technology, specifically relating to a surge arrester installation structure, a surge arrester, and a live-line replacement tool. Background Technology

[0002] Surge arresters, as critical protective devices in power systems, are primarily used to limit overvoltages and protect power equipment from damage caused by lightning strikes and switching overvoltages. Especially in distribution lines with voltage levels of 10kV and above, the stable operation of surge arresters directly affects the safety and reliability of the power supply system. However, in high-altitude and plateau regions, the discharge characteristics, electrical clearances, and insulation performance of surge arresters change due to the unique environmental conditions such as thin air, low air pressure, low humidity, and high ionization. This places more stringent requirements on the structural design, installation methods, and maintenance and replacement of surge arresters. Existing tools for installing or replacing surge arresters used in plains areas often fail to meet the installation structural requirements of high-altitude surge arresters, exhibiting mismatches in mechanical interfaces, guiding accuracy, and safety clearances.

[0003] Currently, common methods for live-line replacement of surge arresters mainly involve using an insulated operating rod in conjunction with mechanical clips for disassembly and assembly, such as the scheme disclosed in "Methods and Special Tools for Live-line Replacement of Zinc Oxide Surge Arresters". These schemes typically employ a double-arm or sleeve-type structure, using claws or threads at the end of the operating rod to fix or separate it from the surge arrester. While this allows for live-line replacement to some extent, it is primarily applicable to standard flat-type surge arresters. For high-altitude surge arresters, due to differences in their dimensions, bottom positioning grooves, and mounting holes, existing tools struggle to achieve precise alignment or secure holding, often resulting in problems such as loose connections, guiding deviations, and difficulties in disassembly and assembly. Especially when operating under complex climatic conditions in high-altitude areas, if the surge arrester is not accurately aligned with the mounting hole or slips off, it can easily lead to arc discharge or a fall accident, posing a significant safety hazard.

[0004] Furthermore, existing technologies involve cumbersome procedures requiring multiple personnel and typically necessitate a power outage or the use of a specialized insulated platform before replacement work can commence. This not only increases maintenance costs but also severely impacts power supply continuity. In mountainous and plateau regions with numerous distribution line branches and complex environments, traditional live-line working methods are often unavailable due to limited site conditions, leading to delayed surge arrester maintenance and affecting line operational safety. Therefore, there is an urgent need for a specialized tool that is compact, easy to operate, and capable of safely replacing high-altitude surge arresters without power interruption.

[0005] To address the aforementioned issues, technicians have attempted to improve the tool structure, such as adding auxiliary clamps, setting mechanical limits, or adjusting the length of the operating lever. However, these improvements still cannot fundamentally solve the problem of adaptability to the special structure of high-altitude surge arresters. Traditional double-jaw or sleeve structures remain insufficient in terms of positioning accuracy and stability, failing to achieve reliable mechanical docking in complex environments. Furthermore, most existing tools do not consider automatic positioning functions under energized conditions, requiring operators to rely on experience to align the arrester with the positioning slot at its lower end, resulting in large operational errors, high workload, and low efficiency. Summary of the Invention

[0006] The purpose of this invention is to solve the problem of low efficiency in live-line replacement of existing surge arresters.

[0007] The objective of this invention is achieved through the following technical solution: A surge arrester mounting structure, comprising: The mounting base is fixed at one end by an insulator, and a surge arrester mounting hole is provided in the middle. Spring latches are provided on both sides of the fixing base, and the telescopic end extends out of the inner wall of the arrester fixing hole; A locking ring groove is provided at one end of the arrester, and the diameter of the fixed end is clearance-fitted with the diameter of the arrester fixing hole. The quick-release guide ring has guide curved surfaces on both sides, slides in the engaging ring groove, and the gap between the guide ring and the engaging ring groove is greater than the outer dimension of the spring latch. The tool positioning hole is located at the center of the other end of the surge arrester and is made of ferromagnetic material. Preferably, the fixing base has an umbrella-shaped structure.

[0008] Preferably, the fixed end includes a guide surface.

[0009] Preferably, the opening of the arrester fixing hole includes a guide surface.

[0010] Preferably, the telescopic end includes a wedge-shaped end.

[0011] Preferably, the guide surface includes an arc surface and / or a conical surface.

[0012] Based on the same inventive concept, the present invention also provides a surge arrester, which includes the surge arrester mounting structure described above.

[0013] Based on the same inventive concept, the present invention also provides a live-line replacement tool for surge arresters, comprising: handle; The fork plate is fixed to one end of the handle on one side; The positioning post, with a built-in magnet, is fixed to the other side of the fork disk, and its outer diameter is clearance-fitted with the tool positioning hole described above. The limiting fork arms are fixed to the periphery of the fork plate by a position adjustment mechanism. There are no fewer than three such arms, which are circumferentially spaced around the positioning post as the central axis. The diameter of the envelope circle between the limiting fork arms is larger than the outer diameter of the arrester body. The fixed position of the limiting fork arms on the fork plate is adjusted by the position adjustment mechanism. During the installation of the surge arrester, when the spring latch enters the engagement ring groove but does not pass the quick-release guide ring, the limiting fork arm contacts and limits the fixed seat. During the disassembly of the surge arrester, the position of the limiting fork arm does not prevent the spring latch from entering the engagement ring groove and further passing over the quick-release guide ring.

[0014] Preferably, the diameter of the envelope circle between the limiting fork arms is smaller than the inner diameter of the equalizing ring.

[0015] Preferably, the position adjustment mechanism includes at least two fixing holes on the limiting fork arm, a threaded hole on the outside of the fork disc, and a threaded fastener that mates with the threaded hole.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The high-altitude adaptive surge arrester quick-change tool proposed in this invention forms a complete technical closed loop in terms of structural design and working principle, realizing the rapid, safe, and accurate replacement of surge arresters in high-altitude environments. Its main technical features include a three-claw circumferential structure, a magnetic positioning mechanism, a spring-loaded latch and quick-release guide ring cooperation structure, and an adjustable limiting fork system. These features work synergistically to achieve the expected technical effects from multiple dimensions, including mechanical stability, electrical safety, and ease of operation.

[0017] First, the tool adopts a three-jaw structure, forming a stable circumferential support through a three-point envelopment, providing a balanced force distribution during the installation and removal of the surge arrester. Compared with traditional double-jaw or sleeve-type structures, the three-jaw structure is mechanically more stable, effectively preventing swaying or deflection of the surge arrester during vertical lifting or lowering. Its force transmission path is symmetrically distributed, forming a wraparound clamping effect, significantly improving mechanical control precision and anti-slip capability. This structural principle ensures that the surge arrester remains coaxially aligned during live operation, preventing changes in air gap caused by attitude deviations, thereby improving electrical safety during live replacement.

[0018] Secondly, the magnetic positioning mechanism with a built-in magnet in the positioning post is one of the core innovations of this invention. By embedding a permanent magnet in the positioning post at the end of the tool, and forming a magnetic attraction with the ferromagnetic positioning hole at the bottom of the surge arrester, the magnetic field automatically guides the positioning post to quickly snap into place when the tool approaches the surge arrester, achieving automatic alignment without manual visual inspection. This principle is based on the adaptive guidance effect of the magnetic field, ensuring operational accuracy and reliability even in harsh environments such as high-altitude areas with strong winds and intense sunlight. Magnetic positioning enables a self-locking coupling between the tool and the surge arrester, reducing manual adjustment steps, shortening operation time, and avoiding the risk of electric shock or detachment caused by repeated calibration.

[0019] Furthermore, the combination of the spring latch and the quick-release guide ring achieves automatic locking and releasing functions. During installation, the spring latch is pushed to both sides by the guide surface, and when it reaches the predetermined position, it springs back into the locking ring groove, thus forming a reliable lock. During disassembly, a tool drives the movable ring to slide, causing its inclined surface to push open the spring latch again, releasing the lock and releasing the surge arrester. This mechanism utilizes the principle of storing and releasing elastic potential energy to achieve automated control of mechanical locking and disengagement, avoiding the jamming, time-consuming, and misoperation problems existing in traditional threaded or pin-type connections. This structure has a long service life, smooth and reliable operation, and ensures mechanical consistency and safety during live-line replacement.

[0020] Furthermore, the adjustable mechanism of the limit fork arm, through the setting of multiple sets of fixing holes and threaded fasteners, allows the tool to adjust the envelope diameter according to different surge arrester specifications, achieving a universal design. Its limit position precisely controls the upward or downward stroke of the surge arrester. When the limit fork arm contacts the fixed base, the operator receives clear mechanical feedback, indicating that the predetermined installation position has been reached. This feature, based on the dual feedback principle of "mechanical limit + visual confirmation," significantly reduces human judgment errors and improves operational safety and assembly consistency.

[0021] In summary, this invention achieves "automatic alignment" through magnetic positioning, "stable support" through a three-claw grip, "rapid locking and releasing" through a spring latch and quick-release guide ring, and "precise limiting" through a limiting fork arm. These features form a systematic closed loop from mechanical action to electrical safety. The combined effect of its technical principles reduces surge arrester replacement time to less than ten minutes, significantly improving live-line working efficiency, reducing labor costs and the risks of working at heights, and meeting the State Grid's technical requirements for maintenance-free operation and safe operation in high-altitude areas. It possesses significant engineering promotion value and safety and economic benefits. Attached Figure Description

[0022] Figure 1 A schematic diagram of the appearance of a surge arrester having a surge arrester installation structure according to the present invention and a live replacement tool; Figure 2 For the present invention Figure 1 A 3D diagram viewed from below at an angle; Figure 3 This is a schematic diagram of the first stage of installing a surge arrester using a surge arrester live replacement tool structure according to the present invention. Figure 4 This is a schematic diagram of the second stage of installing a surge arrester using a surge arrester live replacement tool structure according to the present invention. Figure 5 This is a schematic diagram of the third stage (completed) of installing a surge arrester using a surge arrester live-line replacement tool structure according to the present invention. Figure 6 This is a schematic diagram of the first stage of disassembling a surge arrester using a live-line replacement tool structure according to the present invention. Figure 7 This is a schematic diagram of the second stage of disassembling a surge arrester using a live-line replacement tool structure according to the present invention. Figure 8 This is a schematic diagram of the third stage of disassembling a surge arrester using a live-line replacement tool structure according to the present invention. Figure 9 This is a schematic diagram of the fourth stage (completion) of disassembling a surge arrester using a live-line replacement tool structure according to the present invention. The components are as follows: 1. Fixing base, 2. Spring latch, 3. Engaging ring groove, 4. Quick-release guide ring, 5. Tool positioning hole, 11. Surge arrester fixing hole, 30. Handle, 31. Fork plate, 32. Positioning post, 33. Limiting fork arm, 34. Mounting positioning hole, 35. Removal positioning hole, 36. Fastener, 37. Buffer pad, 100. Insulator, 200. Surge arrester body, 201. Equalizing ring, 202. Fixing end. Detailed Implementation

[0023] The technical solution will be further described below with reference to the accompanying drawings and specific embodiments to help understand the content of the present invention.

[0024] Example 1 like Figure 1-7 As shown, a surge arrester mounting structure includes: The mounting base 1 is fixed at one end by an insulator 100, and a surge arrester mounting hole 11 is provided in the middle. Spring latches 2 are provided on both sides of the fixing base 1, and the telescopic end extends out of the inner wall of the arrester fixing hole 11; The locking ring groove 3 is provided at one end of the fixed end 202 of the surge arrester 200, and the diameter of the fixed end 202 is clearance-fitted with the diameter of the fixing hole 11 of the surge arrester. The quick-release guide ring 4 has guide curved surfaces on both sides, slides in the engaging ring groove 3, and the gap between it and the engaging ring groove 3 is greater than the outer dimension of the spring latch 2; Tool positioning hole 5 is located at the center of the other end of surge arrester 200 and is made of ferromagnetic material. Preferably, the fixing base 1 has an umbrella-shaped structure.

[0025] Preferably, the outer side of the fixed end 202 includes a guide surface to facilitate guidance into the arrester fixing hole 11.

[0026] Preferably, the opening of the arrester fixing hole 11 includes a guide surface. In this embodiment, a flared, gradually changing surface is used, but a funnel-shaped conical surface can also be used.

[0027] Preferably, the guide surface includes an arc surface and / or a conical surface.

[0028] like Figure 1-2 As shown, the mounting base is fixed to the external support structure by an insulator 100, and its interior center is provided with a surge arrester mounting hole 11 for accommodating the mounting end 202 of the surge arrester 200. The mounting base 202 is preferably an umbrella-shaped structure, which not only achieves guiding and sealing functions, but also effectively increases the stress-bearing area and improves wind resistance, thereby adapting to the installation stability in the strong wind environment of plateau areas.

[0029] Preferably, a return spring is provided between the spring latch and the fixing base 1; the limiting end of the spring latch engages and limits with the outer side of the fixing base 1; the telescopic end of the spring latch includes a wedge-shaped end, the inclined surface of which faces the outside of the arrester fixing hole 11 to facilitate the insertion of the fixing end 202 of the arrester 200. There are two spring latches, respectively provided on both sides of the fixing base, and their telescopic ends extend into the inner wall of the arrester fixing hole. The free end of the spring latch is preferably a wedge-shaped structure, so that it can automatically spring in or out along the guide surface during the insertion or withdrawal of the engagement ring groove, improving the smoothness of the assembly and disassembly process. The return spring of the spring latch is made of a high-elasticity metal material, which can ensure sufficient locking force and maintain good recovery performance in high-altitude and low-temperature environments.

[0030] The fixed end of the surge arrester is provided with a locking ring groove, which has a clearance fit with the arrester's fixing hole, allowing the arrester to be smoothly inserted within a limited space. The outer edge of the arrester's fixed end has a guide surface, which, in conjunction with the arc or conical guide design of the fixing hole opening, enables automatic alignment during assembly, reducing manual adjustments. A quick-release guide ring is fitted inside the locking ring groove. This guide ring has smooth guide surfaces on both sides, and the gap between it and the locking ring groove is larger than the outer dimension of the spring latch, allowing the spring latch to open outwards during disassembly, thus facilitating the smooth release of the surge arrester.

[0031] like Figure 2 As shown, a tool positioning hole 5 is provided at the center of the other end of the surge arrester 200, and ferromagnetic material is embedded in the hole. During live replacement, the positioning post 32 at the end of the matching replacement tool has a built-in magnet. Under the action of magnetic force, the positioning post 32 automatically attracts and positions itself with the tool positioning hole 5, achieving rapid alignment and precise installation. This magnetic positioning structure can significantly improve assembly accuracy in high-altitude environments with strong light or limited visibility, while avoiding uneven electrical clearance caused by human error.

[0032] When installing a surge arrester, adjust the fork arm to its maximum length (installation position). The installer holds the surge arrester replacement tool, allowing the positioning pin to automatically attach into the surge arrester's positioning hole. The surge arrester is then secured to the live replacement tool by the magnetic attraction of the positioning pin and the limiting action of the fork arm. Next, align the arrester's fixing end with the arrester's fixing hole in the mounting base. The replacement tool pushes the surge arrester upwards along the guide surface. The positions of all components are as follows: Figure 3 When the locking ring groove of the arrester's fixed end enters the arrester's positioning hole, the spring latch is pushed to both sides under the action of the guide ramp, and the position of each component is as follows: Figure 4 After the surge arrester is pushed up to the predetermined position, the spring latch automatically rebounds under the action of elastic force and engages in the engagement ring groove 3, thereby achieving a firm lock. The limiting fork arm contacts and limits the fixed seat to ensure that the spring latch 2 accurately falls into the engagement ring groove 3. The positional state of each component is as follows: Figure 5 .

[0033] During disassembly, adjust the length of the fork arm to its shortest position (disassembly state). Hold the surge arrester live replacement tool and pass it through the gap between the inner side of the equalizing ring 201 and the surge arrester body 200. Continue pushing it upwards until the positioning post 32 magnetically attaches and secures the surge arrester. The positions of each component are as follows: Figure 6 Continue pushing the surge arrester upwards. The spring latch 2 moves the quick-release guide ring 4 to the downward side of the engaging ring groove 3. Under the horizontal component force of the inclined surface of the quick-release guide ring 4, the spring latch 2 separates to both sides, and the position of each component is as follows: Figure 7 Continue pushing the surge arrester upwards. The spring latch 2 will slide past the quick-release guide ring 4 and into the engaging ring groove 3. The sound generated by the rapid reset of the spring latch 2 as it passes the quick-release guide ring 4 confirms to the operator that the spring latch 2 has passed the quick-release guide ring 4 and entered the engaging ring groove 3. The operator then stops pushing the surge arrester upwards. The positions of all components are as follows: Figure 8 Quickly pull down the live replacement tool for the surge arrester, causing the surge arrester to move downwards rapidly. The spring latch 2, under the action of the inclined surface on the lower side of the quick-release guide ring 4, quickly separates to both sides, then passes over the quick-release guide ring 4, allowing the surge arrester to smoothly detach from the fixing seat, thus achieving safe removal of the surge arrester. Figure 9 .

[0034] It should be noted that, in Figure 9 The gap between the quick-release guide ring 4 and the upper side of the locking ring groove 3 is only for easy differentiation of parts and to serve as an illustration. In actual engineering, the upper side of the locking ring groove 3 has a concave structure to accommodate the conical surface or other shaped guide surface on the upper side of the quick-release guide ring 4. This design allows the spring latch 2 to push the quick-release guide ring 4 upward and press it against the upper side of the locking ring groove 3 to form a seamless structure. This ensures that when the spring latch 2 slides over the quick-release guide ring 4 and the fixed end 202, it will not fall into the gap and enter the locking ring groove 3, thus structurally preventing the failure of the disassembly operation when removing the surge arrester.

[0035] This embodiment utilizes a combination of a guide surface, a spring latch, and a quick-release guide ring to form an automatic locking and releasing mechanism, enabling the surge arrester to be mechanically engaged without manual contact with live parts during installation and removal. The magnetic positioning structure further ensures positioning accuracy and operational safety, allowing the entire installation and removal process to be completed within ten minutes. This compact and easy-to-operate structure is particularly suitable for rapid live-line replacement of surge arresters in harsh environments such as high-altitude regions, significantly improving maintenance efficiency and operational safety.

[0036] Example 2 Based on the same inventive concept, the present invention also provides a surge arrester, which includes a surge arrester mounting structure as described in Embodiment 1.

[0037] Example 3 Based on the same inventive concept, this invention also provides a tool for live-line replacement of surge arresters. For example... Figure 1 As shown, the live-line replacement tool for the surge arrester includes: Handle 30; The fork plate 31 is fixed to one end of the handle 30 on one side; The positioning post 32 has a built-in magnet and is fixed to the other side of the fork disk 31, and its outer diameter is in clearance fit with the tool positioning hole 5 described in Embodiment 1. The limiting fork arms 33 are fixed to the periphery of the fork plate 31 by a position adjustment mechanism. There are no fewer than three such arms, which are circumferentially spaced around the positioning post 32. The diameter of the envelope circle between the limiting fork arms 33 is larger than the outer diameter of the arrester body 200 as described in Embodiment 2. The fixed position of the limiting fork arms 33 on the fork plate 31 is adjusted by the position adjustment mechanism to adapt to the different requirements of the fork arm length for installation and disassembly work.

[0038] The lower end of the limiting fork arm 33 includes a mounting positioning hole 34 and a disassembly positioning hole 35. The position of the mounting positioning hole 34 is as follows: Figure 6 As shown. A cushioning pad 37 made of flexible material is provided on the top of the limiting fork arm 33 to avoid damage to the fixing seat.

[0039] During the installation of the surge arrester, the limiting fork arm 33 is fixed to the outside of the fork disc 31 by fastener 36 passing through the mounting positioning hole 34. When the spring latch enters the engagement ring groove and does not cross the quick-release guide ring, the limiting fork arm contacts and is limited by the fixed seat. During the disassembly of the surge arrester, the limiting fork arm 33 is fixed to the outside of the fork disc 31 by fastener 36 passing through the disassembly positioning hole 35. The position of the limiting fork arm does not prevent the spring latch from entering the engagement ring groove and further passing over the quick-release guide ring.

[0040] Preferably, the diameter of the envelope circle between the limiting fork arms 33 is smaller than the inner diameter of the equalizing ring 201.

[0041] The position adjustment mechanism includes at least two fixing holes on the limiting fork arm, a threaded hole on the outside of the fork disc, and a threaded fastener that mates with the threaded hole. In this embodiment, the fixing holes include mounting positioning holes 34 and disassembly positioning holes 35. In order to be suitable for different specifications of surge arresters, there may be more than two positioning holes.

[0042] One side of the fork is fixed to one end of the handle for transmitting operating torque; the other side of the fork has a positioning post with a magnet embedded inside, fixedly connected to the center of the fork, and its outer diameter is clearance-fitted with the tool positioning hole described in Embodiment 1. Through this magnetic attraction structure, when the tool approaches the surge arrester, the positioning post can automatically adhere to the ferromagnetic positioning hole at the bottom of the surge arrester under magnetic force, achieving automatic alignment and rapid positioning without the need for repeated manual calibration, ensuring the safety and accuracy of the operation.

[0043] The fork plate has at least three limiting fork arms arranged circumferentially, symmetrically distributed around the positioning post or evenly spaced circumferentially. Each limiting fork arm is fixed to the outer edge of the fork plate by a position adjustment mechanism. The diameter of the envelope circle between the limiting fork arms is larger than the outer diameter of the arrester body as described in Example 1, and the distance between any two limiting fork arms is larger than the outer diameter of the arrester body. The position adjustment mechanism includes two or more fixing holes on the limiting fork arms, threaded holes on the outside of the fork plate, and threaded fasteners that mate with the threaded holes. By adjusting the positions of different fixing holes, the extension length of the fork arms can be changed according to the size differences of the arrester to adapt to the loading and unloading operations of different models of arresters, thereby achieving tool universality.

[0044] Preferably, the diameter of the envelope circle between the limiting fork arms is smaller than the inner diameter of the equalizing ring of the surge arrester, so as to avoid interference with the equalizing ring during live operation, and at the same time improve the reliability of fixing the surge arrester and effectively prevent accidental detachment. Each limiting fork arm is provided with a buffer pad at its end, which can effectively prevent mechanical damage to the fixing base.

[0045] During the installation of the surge arrester, the operator uses an insulated operating rod to control the handle, causing the entire tool to rise axially along the surge arrester. When the fixed end of the surge arrester is inserted into the mounting hole, and the spring latch gradually enters the engagement ring groove but has not yet passed the quick-release guide ring, the end of the limiting fork arm contacts the flared part of the mounting base, forming a mechanical limit to prevent further upward pushing and deformation or over-insertion of the latch. At this point, the operator receives a clear mechanical feedback signal confirming that the surge arrester has reached the intended installation position. Subsequently, the spring latch rebounds and enters the engagement ring groove to complete the locking process.

[0046] When disassembling the surge arrester, the limiting fork first engages and secures the arrester, ensuring its overall stability. Then, the tool continues to push upwards and then in the opposite direction. As the tool moves downwards, the quick-release guide ring's bevel pushes the spring latches to both sides, disengaging the surge arrester from the mounting hole. During this process, the limiting fork ensures the surge arrester does not sway laterally during descent. Through the dual constraints of magnetic positioning and the limiting fork, the surge arrester can be smoothly disengaged vertically, greatly improving operational safety.

[0047] The working principle of this embodiment is as follows: self-alignment is achieved through magnetic attraction, precise positioning is achieved through mechanical limiting, stable support is achieved through a three-pronged encirclement, and automatic unlocking is achieved through the inclined structure of the quick-release guide ring. These components form a synergistic system of mechanical and magnetic coupling, allowing the loading and unloading process to be completed safely without power interruption. Compared with traditional manual calibration or threaded locking methods, this embodiment not only shortens the surge arrester replacement time to less than ten minutes but also significantly reduces the danger and operational error rate of working at heights. This structure is simple and highly modular, making it particularly suitable for live-line maintenance of high-voltage lines in plateau areas, and possesses significant economic advantages and widespread application value.

[0048] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the present invention.

Claims

1. A surge arrester installation structure, characterized in that, include: The mounting base is fixed at one end by an insulator, and a surge arrester mounting hole is provided in the middle. Spring latches are provided on both sides of the fixing base, and the telescopic end extends out of the inner wall of the arrester fixing hole; A locking ring groove is provided at one end of the arrester, and the diameter of the fixed end is clearance-fitted with the diameter of the arrester fixing hole. The quick-release guide ring has guide curved surfaces on both sides, slides in the engaging ring groove, and the gap between the guide ring and the engaging ring groove is greater than the outer dimension of the spring latch. The tool positioning hole is located at the center of the other end of the surge arrester and is made of ferromagnetic material.

2. The surge arrester installation structure as described in claim 1, characterized in that, The mounting base has an umbrella-shaped structure.

3. The surge arrester installation structure as described in claim 1, characterized in that, The fixed end includes a guide surface.

4. The surge arrester installation structure as described in claim 1, characterized in that, The opening of the arrester fixing hole includes a guide surface.

5. The surge arrester installation structure as described in claim 1, characterized in that, The telescopic end includes a wedge-shaped end.

6. A surge arrester installation structure as described in claim 1, 3, or 4, characterized in that, The guide surface includes a circular arc surface and / or a conical surface.

7. A surge arrester, characterized in that, Includes a surge arrester installation structure as described in any one of claims 1-6.

8. A live-line replacement tool for surge arresters, characterized in that, include: handle; The fork plate is fixed to one end of the handle on one side; A positioning post, with a built-in magnet, is fixed to the other side of the fork, and its outer diameter is clearance-fitted with the tool positioning hole as described in any one of claims 1-6; The limiting fork arms are fixed to the periphery of the fork plate by a position adjustment mechanism. There are no fewer than three such arms, which are circumferentially spaced around the positioning post as the central axis. The diameter of the envelope circle between the limiting fork arms is larger than the outer diameter of the arrester body as described in claim 7. The fixed position of the limiting fork arms on the fork plate is adjusted by the position adjustment mechanism. During the installation of the surge arrester, when the spring latch enters the engagement ring groove but does not pass the quick-release guide ring, the limiting fork arm contacts and limits the fixed seat. During the disassembly of the surge arrester, the position of the limiting fork arm does not prevent the spring latch from entering the engagement ring groove and further passing over the quick-release guide ring.

9. A surge arrester live-line replacement tool as described in claim 8, characterized in that, The diameter of the envelope circle between the limiting forks is smaller than the inner diameter of the equalizing ring.

10. A surge arrester live-line replacement tool as described in claim 8, characterized in that, The position adjustment mechanism includes at least two fixing holes on the limiting fork arm, a threaded hole on the outside of the fork disc, and a threaded fastener that mates with the threaded hole.

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