Lightning protection device with fault indication function for live working

Abstract

The application discloses a single-person operating type live-line work lightning arrester with a fault indication function, and belongs to the technical field of lightning arresters. The lightning arrester comprises a mounting frame and a base, the base is provided with a lightning arrester body, the lightning arrester body comprises a core rod, the top end of the core rod is provided with an execution assembly, the core rod is provided with a zinc oxide element in a sleeving mode, the top end of the core rod is provided with a fitting, and the fitting is provided with a butt joint assembly and a fault indication assembly. The butt joint assembly is arranged, so that a worker can independently complete the live wiring and disengagement operation of the lightning arrester and the electric wire after climbing the rod. When a fault occurs, the fault indication assembly and the execution assembly are used in cooperation, a patrol personnel can quickly complete the judgment on the fault of the device on the ground by directly visual inspection or using a telescope, meanwhile, the damage is delayed by using a dyeing protective liquid, so that time is saved between the occurrence of the fault and the arrival of a maintenance personnel at the scene, and when subsequent fault checking is carried out, the fault position and range can be judged by cutting open the protective sleeve according to the colored area.

Description

Technical Field

[0001] This invention relates to the field of surge arrester technology, and in particular to a surge arrester device with fault indication function that is operable by a single soldier and can be operated live. Background Technology

[0002] Overhead power distribution lines widely use composite-jacketed metal oxide surge arresters as overvoltage protection devices. These arresters are typically fixed to the line crossarm with bolts and require branch leads for connection. When there are adhesion defects at the interface between the core rod and the sheath, or when moisture intrudes due to aging of the seal, partial discharge can easily occur inside the core rod under voltage. The acidic substances generated by the discharge continuously corrode the epoxy resin matrix, causing pyrolysis of the core rod material, accompanied by gas generation and local temperature rise. As the degree of deterioration deepens, the mechanical strength of the core rod continuously decreases, eventually leading to brittle fracture without obvious external signs, resulting in conductor drop accidents. For such hidden faults, there are no effective early detection methods. Existing fault indication schemes are mostly aimed at the failure of the electrical performance of surge arresters, such as the aging and breakdown of valve plates. They are judged by detecting leakage current or temperature abnormalities. However, the changes in electrical parameters in the early stage of decay and fracture are weak and difficult to be captured by conventional monitoring methods. They are often only discovered after the fracture accident has occurred. For lightning arresters that have malfunctioned, it is necessary to dissect and analyze the faulty parts after disassembly. The current practice is to disassemble the faulty lightning arrester and then dissect the sheath section by section in the laboratory to check the appearance of the core rod to find the fracture point or discoloration area. However, the rotten fracture surface often appears to be loose and powdery, and the acidic corrosion products penetrate a large range along the core rod interface. It is difficult to accurately define the deterioration boundary and the initial fault point during dissection, which brings difficulties to the fault cause analysis and product improvement. To address these issues, a single-soldier-operable lightning protection device with fault indication function, capable of live-line operation, is proposed. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art by proposing a single-soldier-operable lightning protection device with fault indication function that can be operated live.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A single-soldier-operable, live-line working lightning arrester with fault indication function includes a mounting frame and a base located on the side wall of the mounting frame. The arrester body is mounted on the base. The arrester body includes a core rod protected by a housing. The outer side wall of the core rod is provided with a gas guide groove. The top of the core rod is provided with an actuation component. A zinc oxide element is sleeved on the core rod. A hardware is installed at the top of the core rod. The bottom of the core rod is provided with a ground wire connected to the base. The outer side walls of the core rod and the zinc oxide element are covered with a protective sleeve integrating a skirt assembly. The fitting is provided with a docking component at the top and a fault indicator component on the outer wall of the fitting; The docking assembly includes a bracket, a movable stop bar and a return spring on one side of the bracket, a pressing rod below the movable stop bar, and a linkage assembly on the other side of the bracket for linkage between the movable stop bar and the pressing rod, with a pressing plate on the pressing rod; The fault indication component includes a ring-shaped liquid storage chamber containing a dyeing protective solution. The bottom of the liquid storage chamber has multiple outlets, and each outlet has a sealing ring. The actuation component includes a piston cylinder arranged in a ring, a single-pass piston ring inside the piston cylinder, and a plurality of actuator rods with matching liquid outlets on the single-pass piston ring. The actuator rods are provided with a liquid discharge channel.

[0005] As a preferred embodiment, the linkage assembly includes two oppositely arranged driven mounting seats, which are respectively fixedly connected to the rotating shafts of the movable stop and the pressing rod, and a connecting rod is hinged between the two driven mounting seats.

[0006] As a preferred embodiment, the liquid storage chamber is transparent and partially exposed outside the protective sleeve, allowing maintenance personnel to directly observe the liquid level of the dyeing protective liquid. The bottom of the liquid storage chamber is provided with a guide cone surface and a sealing groove that match the actuator. The guide cone surface is used to guide the dyeing protective liquid to each outlet.

[0007] As a preferred embodiment, the bottom of the piston cylinder is open and communicates with the top of the shell in the mandrel, so that the gas generated by the fault can act on the single-pass piston ring, and a limit groove is provided on the inner side wall of the piston cylinder.

[0008] As a preferred embodiment, the outer side wall of the single-stroke piston ring is provided with a fixing pin that matches the limiting groove. The fixing pin is driven by a spring and is used to lock with the limiting groove to realize the single-stroke action of the single-stroke piston ring.

[0009] As a preferred embodiment, a sealing ring is provided on the outer side wall of the top of the actuator rod, a plug is provided at the end of the actuator rod, and a convex ring with a matching sealing groove is provided at the bottom of the plug to cooperate with the sealing groove to form a simple labyrinth structure, and a single-pass piston ring is passed through the bottom of the actuator rod.

[0010] As a preferred embodiment, the drain channel is located inside the actuator rod, and the top of the drain channel is provided with a liquid inlet. The liquid inlet is located below the sealing ring. After the single-stroke piston ring completes its stroke, the liquid inlet is located in the storage chamber, allowing the dyeing protective liquid to enter the mandrel through the drain channel.

[0011] As a preferred embodiment, the dyeing protective solution is specifically composed of an alkaline buffer solution, a colored dye, and a surfactant. The alkaline buffer solution is a sodium carbonate-sodium bicarbonate buffer solution. The mass fraction of the colored dye in the dyeing protective solution is 0.5% to 2%, and the mass fraction of the surfactant is 0.05% to 0.2%. When the dyeing protective solution enters the mandrel, it can penetrate and diffuse along the gas guide groove and microcrack channel of the mandrel, neutralize the acidic corrosion products generated by the mandrel failure, and delay the further degradation of the epoxy resin matrix.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention utilizes the combined use of a fault indication component and an execution component. By using the gas generated by a fault in the mandrel to drive the single-stroke piston ring upward, it drives the execution rod to move upward synchronously and open the liquid outlet. This allows the dyeing protective liquid to be injected into the mandrel through the drainage channel. This enables inspection personnel to quickly determine the fault of the device from the ground by direct visual inspection or by using a telescope. At the same time, it delays the further degradation of the epoxy resin matrix and the stress corrosion fracture of the glass fiber, thus gaining a valuable time window between the occurrence of the fault and the arrival of maintenance personnel on site.

[0013] 2. By setting a dyeing protective liquid, this invention can provide a significant indicator signal during the inspection process, and also accurately determine the location and scope of the fault by dissecting the protective sleeve and judging the dyed area during subsequent fault diagnosis, thus providing an accurate basis for the formulation of maintenance plans.

[0014] 3. By setting up a docking component, this invention allows workers to independently complete the live connection and disconnection of the lightning arrester and the power line after climbing the pole, without the need for a second person on the pole to assist or ground personnel to pass tools. This solves the problem of traditional lightning arrester replacement requiring multiple people to cooperate and work together on and off the pole, reducing the number of workers required and improving work efficiency. Attached Figure Description

[0015] Figure 1 This is a front structural diagram of the lightning protection device with fault indication function that can be operated by a single soldier and is capable of live-line work, as proposed in this invention. Figure 2 This is a schematic diagram of the docking component in the deployed state of the lightning protection device with fault indication function that can be operated by a single soldier and is capable of live-line work, as proposed in this invention. Figure 3 This is a schematic diagram of the rear structure of the lightning protection device with fault indication function that can be operated by a single soldier and is capable of live-line work, as proposed in this invention. Figure 4 This is a cross-sectional view of the internal structure of the surge arrester body in the single-soldier-operable live-line working surge protection device with fault indication function proposed in this invention. Figure 5This is an assembly diagram of the internal structure of the surge arrester body in the surge arrester device with fault indication function that can be operated by a single soldier and is capable of live-line work, as proposed in this invention. Figure 6 This is a cross-sectional view of the fault indication component and the execution component in the normal state of the lightning protection device with fault indication function that can be operated by a single soldier and is capable of live-line work, as proposed in this invention. Figure 7 This is a cross-sectional view of the fault indication component and the execution component in the fault-indicating lightning protection device with fault indication function that can be operated by a single soldier under energized conditions, as proposed in this invention. Figure 8 for Figure 7 Enlarged view of the structure at point A in the middle; Figure 9 This is a cross-sectional view of the execution component in the single-soldier-operable live-line working lightning protection device with fault indication function proposed in this invention; Figure 10 This is a cross-sectional view of the actuator in the single-soldier-operable live-line working lightning protection device with fault indication function proposed in this invention.

[0016] In the diagram: 1. Mounting frame; 2. Core rod; 3. Air guide groove; 4. Zinc oxide element; 5. Fittings; 6. Protective sleeve; 7. Bracket; 8. Movable stop bar; 9. Return spring; 10. Pressing rod; 11. Liquid storage chamber; 1101. Guide cone surface; 12. Liquid outlet; 13. Piston cylinder; 14. Single-stroke piston ring; 15. Actuating rod; 16. Drainage channel; 17. Driven mounting seat; 18. Connecting rod; 19. Limiting groove; 20. Fixing pin; 21. Protruding ring; 22. Liquid inlet. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] Example, refer to Figures 1 to 10 A single-soldier, live-line-operable lightning arrester with fault indication function includes a mounting frame 1 and a base located on the side wall of the mounting frame 1 for fixing the lightning arrester to the transmission line tower. The arrester body is mounted on the base. The arrester body includes a core rod 2 protected by a shell. The outer wall of the core rod 2 has a gas guide groove 3. When gas is generated inside the core rod 2 due to a fault, the gas guide groove 3 provides a priority channel for the gas to migrate along the axial direction of the core rod 2, guiding the fault gas towards the actuator. The top of the core rod 2 has... The actuator has a zinc oxide element 4 mounted on the core rod 2. The zinc oxide element 4 is a prior art technology that utilizes the nonlinear resistance characteristics of zinc oxide to achieve overvoltage protection. A hardware 5 is installed at the top of the core rod 2 to achieve mechanical and electrical connection between the core rod 2 and the wire side. A ground wire is provided at the bottom of the core rod 2 to connect to the base. A protective sleeve 6 with an integrated umbrella skirt assembly is mounted on the outer wall of the core rod 2 and the zinc oxide element 4 to provide external insulation protection for the core rod 2 and the zinc oxide element 4. The umbrella skirt assembly is used to increase the creepage distance and improve the anti-pollution flashover capability. The top of Fitting 5 is equipped with a docking component, which is used to enable rapid live docking and disconnection between the lightning protection device and the power line, supporting live operation by a single soldier. The outer wall of Fitting 5 is equipped with a fault indicator component, which is used to issue a visually identifiable fault signal when the lightning protection device malfunctions, making it easy for staff to quickly locate the fault point. The docking assembly includes a bracket 7. A movable stop bar 8 and a return spring 9 are provided on one side of the bracket 7. One end of the return spring 9 is fixedly connected to the end of the movable stop bar 8, and the other end of the return spring 9 is fixedly connected to the surface of the bracket 7. A pressing rod 10 is provided below the movable stop bar 8 for applying downward pressure to the wire. A linkage assembly is provided on the other side of the bracket 7 for linkage between the movable stop bar 8 and the pressing rod 10. When the movable stop bar 8 and the pressing rod 10 contact the wire, they unfold relative to each other to accommodate the wire to enter. After docking is completed, they close using the elastic force of the return spring 9 to lock the wire. The fault indication component includes a ring-shaped reservoir 11 for storing dyeing protective liquid. The ring-shaped arrangement is designed to be evenly distributed around the outer wall of the fitting 5, allowing the dyeing protective liquid to flow out evenly in the circumferential direction when released without damaging the function of the core rod 2 and the fitting 5. The reservoir 11 contains dyeing protective liquid, which is released into the outer wall of the protective sleeve 6 or the inside of the core rod 2 when a fault occurs to delay the expansion of damage, and forms a visually identifiable fault indication signal through color change. The bottom of the reservoir 11 is provided with multiple outlets 12, and each outlet 12 is provided with a sealing ring. The actuator includes a piston cylinder 13 arranged in a ring. A one-way piston ring 14 is provided inside the piston cylinder 13 for unidirectional axial movement along the piston cylinder 13 under the pressure of the fault gas, converting the gas pressure energy into mechanical energy. The one-way piston ring 14 is provided with multiple actuator rods 15 that match the liquid outlet 12. The liquid outlet 12 is opened by the displacement of the actuator rod 15. The actuator rod 15 is provided with a drainage channel 16 to provide a flow path for the dyeing protective liquid to flow from the liquid storage chamber 11 to the interior of the mandrel 2.

[0021] Furthermore, the linkage assembly includes two oppositely arranged driven mounting seats 17, which are fixedly connected to the rotating shafts of the movable stop bar 8 and the pressing bar 10, respectively. A connecting rod 18 is hinged between the two driven mounting seats 17 so that the movement of the pressing bar 10 matches that of the movable stop bar 8. Furthermore, the liquid storage chamber 11 is transparent and partially exposed outside the protective sleeve 6, allowing maintenance personnel to directly observe the liquid level of the dyeing protective solution. During inspections, staff can determine whether the device is in good condition by observing whether the liquid in the liquid storage chamber 11 is sufficient. The bottom of the liquid storage chamber 11 is equipped with a guide cone surface 1101 and a sealing groove that match the actuator 15. The guide cone surface 1101 is used to guide the dyeing protective solution to each outlet 12, ensuring that each outlet 12 has sufficient liquid flowing out when it is opened and avoiding local empty flow. The further advantage of adopting the above is that the partially exposed transparent liquid storage chamber 11 design eliminates the need for inspection personnel to climb the tower for inspection. Inspection personnel can quickly determine the integrity of the device by direct visual inspection or by using a telescope from the ground. If the liquid level in the liquid storage chamber 11 is normal, it indicates that the device has not been triggered and is in standby mode. If the liquid level drops significantly or is emptied, it indicates that the fault indicator component has been activated, reducing the workload and difficulty of daily inspections.

[0022] Furthermore, the bottom of the piston cylinder 13 is open and connected to the top of the shell in the mandrel 2, so that the gas generated by the fault can act on the single-stroke piston ring 14, which is used to directly introduce the gas pressure generated inside the mandrel 2 due to the fault into the bottom of the piston cylinder 13, and use the pressure of the fault gas itself as the driving force to drive the single-stroke piston ring 14 to move. A limit groove 19 is provided on the inner side wall of the piston cylinder 13 to limit the maximum stroke position of the single-stroke piston ring 14. Furthermore, the outer wall of the single-stroke piston ring 14 is provided with a fixing pin 20 that matches the limiting groove 19. The fixing pin 20 is driven by a spring and is used to lock with the limiting groove 19 to realize the single-stroke action of the single-stroke piston ring 14. When the single-stroke piston ring 14 reaches the end of its stroke, the fixing pin 20 is engaged in the limiting groove 19 to lock the single-stroke piston ring 14 at the end position and prevent it from returning to the initial position, thereby ensuring the irreversibility of the fault indication action. The further advantage of the above is that the one-way locking mechanism formed by the fixed pin 20 and the limiting slot 19 achieves a purely mechanical irreversible holding function. Once the fault indicator component is triggered, even if the internal air pressure of the core rod 2 subsequently drops or disappears, the one-way piston ring 14 will still be locked at the end position and will not retract. The drain channel 16 will remain open, and the liquid level in the reservoir 11 will remain in a decreasing state, thereby ensuring the permanence and reliability of the fault indicator signal and avoiding the risk of misjudgment due to the disappearance or intermittent recovery of the indicator signal caused by air pressure fluctuations. At the same time, the purely mechanical locking method does not rely on any external energy or electronic components and has reliability in a strong electromagnetic environment.

[0023] Furthermore, a sealing ring is provided on the outer side wall of the top of the actuator 15, and a plug is provided at the end of the actuator 15 to seal the inlet 22 of the drain channel 16 under normal conditions, preventing the dyeing protective liquid from flowing into the drain channel 16 in advance. The bottom of the plug is provided with a convex ring 21 that matches the sealing groove, which is used to cooperate with the sealing groove to form a simple labyrinth structure to enhance the sealing effect and prevent the dyeing protective liquid from leaking along the mating gap under normal conditions. The bottom of the actuator 15 passes through a single-pass piston ring 14. Furthermore, the drain channel 16 is located inside the actuator rod 15. The top of the drain channel 16 is provided with an inlet 22, which is located below the sealing ring. Under normal conditions, the inlet 22 is isolated from the inner wall of the outlet 12 in the storage chamber 11 by the sealing ring, ensuring sealing while preventing the dyeing protective liquid from entering the drain channel 16. After the single-stroke piston ring 14 finishes its stroke, the inlet 22 moves upward with the actuator rod 15 and enters the storage chamber 11, allowing the dyeing protective liquid to flow into the drain channel 16 through the inlet 22. After the single-stroke piston ring 14 finishes its stroke, the inlet 22 is located in the storage chamber 11, allowing the dyeing protective liquid to enter the core rod 2 through the drain channel 16. The dyeing protective liquid enters the core rod 2 and will permeate and diffuse along the air guide groove 3 of the core rod 2 and the micro-crack channel caused by the fault, achieving a protective effect. At the same time, the liquid level in the storage chamber 11 will drop, providing a significant indication signal. The further advantage of the above-mentioned method is that, through the coordinated use of the single-stroke piston ring 14, the actuator 15, and the liquid storage chamber 11, the gas generated by the failure of the mandrel 2 pushes the single-stroke piston ring 14 to move upward, causing the actuator 15 to move upward synchronously. The plug disengages from the slot and opens the outlet 12, while the inlet 22 enters the liquid storage chamber 11. The dyeing protective liquid flows into the drainage channel 16 through the outlet 12 and is injected into the air guide groove 3 of the mandrel 2 along the inside of the actuator 15. When the single-stroke piston ring 14 reaches the end of its stroke, the fixing pin 20 engages with the limiting slot 19 to lock it. The outlet 12 and the inlet 22 remain fully open synchronously until the liquid storage chamber 11 is emptied. The entire action chain is completed in one go by the single upward movement of the single-stroke piston ring 14, and each link is completely synchronized in time, thereby simultaneously achieving the functions of fault indication and emergency protection.

[0024] Furthermore, the dyeing protective solution is specifically composed of an alkaline buffer solution, a colored dye, and a surfactant. The alkaline buffer solution is a sodium carbonate-sodium bicarbonate buffer solution. The mass fraction of the colored dye in the dyeing protective solution is 0.5% to 2%, which provides a visually identifiable blue color to the dyeing protective solution. The mass fraction of the surfactant is 0.05% to 0.2%, which is used to reduce the surface tension of the dyeing protective solution and enhance its wetting and penetration ability on the gas guide groove 3 and microcrack channels of the core rod 2. When the dyeing protective solution enters the core rod 2, it can penetrate and diffuse along the gas guide groove 3 and microcrack channels of the core rod 2, and neutralize the acidic corrosion products generated by the failure of the core rod 2, thus delaying the further degradation of the epoxy resin matrix. It should be noted that the colored dyes are specifically alkali-resistant dyes from existing technologies, such as phthalocyanine blue and sea blue, and the color of the colored dyes needs to be different from the color of the protective sleeve 6.

[0025] The further advantage of using the above-mentioned alkaline buffer solution is that it can actively neutralize the acidic corrosion products such as nitric acid generated by partial discharge during the decay and fracture of the core rod 2, intervene in the fault deterioration chain, and transform the acidic environment that was originally continuously degrading the epoxy resin into a neutral or weakly acidic environment. This delays the further degradation of the epoxy resin matrix and the stress corrosion fracture of the glass fiber, thus gaining a valuable time window between the occurrence of the fault and the arrival of maintenance personnel on site. The colored dye allows the dyeing protective solution to penetrate into the interior of the core rod 2. During subsequent fault diagnosis, the location and extent of the fault can be accurately determined by opening the protective sleeve 6 and judging from the colored area, providing an accurate basis for the formulation of maintenance plans.

[0026] When this invention is used, the mounting frame 1 is fixed to the transmission line tower. The worker presses the wire into the docking assembly. During this process, the movable stop 8 rotates downward under the pressure of the wire, overcoming the force of the return spring 9 to rotate and open, and drives the upper driven mounting seat 17 to rotate. When the upper driven mounting seat 17 rotates, the connecting rod 18 moves downward, pushing the lower driven mounting seat 17 to rotate relative to it, so that the pressing rod 10 rotates upward, allowing the pressing plate to open. After the wire slides into the inside of the pressing plate, the return spring 9 drives the movable stop 8 to automatically return and close. At this time, the pressing plate presses the wire tightly, completing the electrical connection. Under normal operating conditions, the single-pass piston ring 14 of the actuator is located at the initial position at the bottom of the piston cylinder 13. The protruding ring 21 of the plug is embedded in the sealing groove at the bottom of the liquid storage chamber 11 to form a simple labyrinth seal. The liquid outlet 12 is closed by the plug, and the liquid inlet 22 is located below the sealing ring and isolated outside the liquid storage chamber 11. The dyeing protective liquid is sealed and stored in the liquid storage chamber 11, does not participate in electrical operation, and does not intervene in the voltage protection function. The zinc oxide element 4 normally plays the role of overvoltage protection. When the core rod 2 malfunctions due to moisture, overvoltage, or material aging, the acidic corrosion products generated by partial discharge erode the epoxy resin matrix, causing the core rod 2 material to pyrolyze and produce organic gas. The gas pressure gradually increases, and the gas migrates along the gas guide groove 3 on the outer wall of the core rod 2 to the top of the inner shell of the core rod 2. It then enters the piston cylinder 13 through the open end at the bottom of the piston cylinder 13 and acts on the lower surface of the single-stroke piston ring 14. When the gas pressure reaches the action threshold, it pushes the single-stroke piston ring 14 upward, and the actuator rod 15 moves upward accordingly. The plug disengages from the slot and opens the liquid outlet 12. The liquid inlet 22 moves upward with the actuator rod 15 and enters the liquid storage chamber 11. Under the action of gravity, the dyeing protective liquid is collected by the guide cone surface 1101 to each liquid outlet 12, flows into the drainage channel 16, and then injects into the core rod 2 along the inside of the actuator rod 15. It then permeates and diffuses along the gas guide groove 3 and the microcrack channel. During this process, the alkaline buffer solution neutralizes the acidic corrosion inside the core rod 2, delaying the further degradation of the epoxy resin. When the single-stroke piston ring 14 reaches the end of its stroke, the fixing pin 20 engages with the limiting slot 19, locking the single-stroke piston ring 14 at the end position, keeping the outlet 12 and inlet 22 fully open. The dyeing protective liquid continues to be discharged until the storage chamber 11 is emptied, thus permanently maintaining the fault indication signal. Before the maintenance personnel arrive, the dyeing protective liquid has already played a neutralizing and protective role inside the core rod 2, delaying the continued deterioration of the fault and buying valuable time for emergency repairs. When the inspection personnel check, they can quickly determine the fault of the lightning protection device by observing the transparent storage chamber 11 and finding that the liquid level in the storage chamber 11 has dropped significantly or been emptied. After replacing the faulty lightning protection device, maintenance personnel can accurately determine the location and extent of the fault by cutting open the protective sleeve 6 and observing the coloring marks inside the core rod 2.

[0027] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A single-soldier-operable lightning arrester with fault indication function, capable of live-line work, comprising a mounting frame (1) and a base located on the side wall of the mounting frame (1), characterized in that, The base is provided with a surge arrester body, the surge arrester body includes a core rod (2) protected by a shell, the outer side wall of the core rod (2) is provided with a gas guide groove (3), the top of the core rod (2) is provided with an actuation component, a zinc oxide element (4) is sleeved on the core rod (2), a hardware (5) is installed on the top of the core rod (2), the bottom of the core rod (2) is provided with a ground wire connected to the base, and the outer side walls of the core rod (2) and the zinc oxide element (4) are sleeved with a protective sleeve (6) integrating a skirt assembly. The fitting (5) is provided with a docking component at the top and a fault indicator component on the outer side wall of the fitting (5); The fault indication component includes a ring-shaped liquid storage chamber (11), which contains a dyeing protective liquid. The dyeing protective liquid is specifically composed of an alkaline buffer solution, a colored dye, and a surfactant. The bottom of the liquid storage chamber (11) is provided with multiple liquid outlets (12), and each liquid outlet (12) is provided with a sealing ring. The actuation component includes a piston cylinder (13) arranged in an annular shape, a single-pass piston ring (14) is provided inside the piston cylinder (13), and an actuation rod (15) with multiple matching liquid outlets (12) is provided on the single-pass piston ring (14), and a liquid discharge channel (16) is provided inside the actuation rod (15).

2. The lightning protection device with fault indication function, operable by a single soldier, and capable of live-line operation, as described in claim 1, is characterized in that... The docking assembly includes a bracket (7), a movable stop bar (8) and a return spring (9) are provided on one side of the bracket (7), a pressing rod (10) is provided below the movable stop bar (8), and a linkage assembly is provided on the other side of the bracket (7) for linkage between the movable stop bar (8) and the pressing rod (10), and a pressing plate is provided on the pressing rod (10).

3. The lightning protection device with fault indication function, operable by a single soldier, and capable of live-line operation, as described in claim 2, is characterized in that... The linkage assembly includes two oppositely arranged driven mounting seats (17), which are fixedly connected to the rotating shafts of the movable stop (8) and the pressing rod (10), respectively, and a connecting rod (18) is hinged between the two driven mounting seats (17).

4. The lightning protection device with fault indication function, operable by a single soldier, capable of live-line operation, as described in claim 1, is characterized in that... The liquid storage chamber (11) is transparent and partially exposed outside the protective sleeve (6), allowing maintenance personnel to directly observe the liquid level of the dyeing protective liquid. The bottom of the liquid storage chamber (11) is provided with a flow guide cone (1101) matching the actuator (15) and a sealing groove. The flow guide cone (1101) is used to guide the dyeing protective liquid to each outlet (12).

5. The lightning protection device with fault indication function, operable by a single soldier, capable of live-line operation, as described in claim 1, is characterized in that... The bottom of the piston cylinder (13) is open and communicates with the top of the shell in the mandrel (2), so that the gas generated by the fault can act on the single-pass piston ring (14). A limit groove (19) is provided on the inner side wall of the piston cylinder (13).

6. The lightning protection device with fault indication function, operable by a single soldier, capable of live-line operation, as described in claim 4, is characterized in that... The outer side wall of the single-stroke piston ring (14) is provided with a fixing pin (20) that matches the limiting groove (19). The fixing pin (20) is driven by a spring and is used to lock with the limiting groove (19) to realize the single-stroke action of the single-stroke piston ring (14).

7. The lightning protection device with fault indication function, operable by a single soldier, capable of live-line operation, as described in claim 3, is characterized in that... The outer side wall of the top of the actuator (15) is provided with a sealing ring, and the end of the actuator (15) is provided with a plug. The bottom of the plug is provided with a convex ring (21) that matches the sealing groove, which is used to cooperate with the sealing groove to form a simple labyrinth structure. The bottom of the actuator (15) passes through a single-pass piston ring (14).

8. The lightning protection device with fault indication function, operable by a single soldier, capable of live-line operation, as described in claim 1, is characterized in that... The drain channel (16) is located inside the actuator (15). The top of the drain channel (16) is provided with an inlet (22). The inlet (22) is located below the sealing ring. After the single-stroke piston ring (14) finishes its stroke, the inlet (22) is located inside the storage chamber (11), allowing the dyeing protective liquid to enter the mandrel (2) through the drain channel (16).

9. The lightning protection device with fault indication function, operable by a single soldier, capable of live-line operation, as described in claim 1, is characterized in that... The alkaline buffer solution is a sodium carbonate-sodium bicarbonate buffer solution. The mass fraction of the colored dye in the dyeing protective solution is 0.5% to 2%, and the mass fraction of the surfactant is 0.05% to 0.2%. When the dyeing protective solution enters the mandrel (2), it can penetrate and diffuse along the air guide groove (3) and microcrack channel of the mandrel (2), and neutralize the acidic corrosion products generated by the failure of the mandrel (2), thus delaying the further degradation of the epoxy resin matrix.

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