10kv pole-mounted transformer platform complete set with safety protection function

Abstract

The utility model discloses a 10kV post transformer platform complete equipment with safety protection function belongs to the technical field of transformation equipment. The device solves the poor versatility and potential safety hidden danger problem caused by the invariable grounding system of traditional post transformer platform. Including: the transformer, fuse and lightning arrester are installed on the electric pole, the grounding busbar is fixedly installed on the electric pole, including the insulation base and the mutually isolated fixed protection grounding terminal and working grounding terminal, the protection grounding terminal is used for connecting the protection grounding down lead, and the working grounding terminal is used for connecting the working grounding down lead, one end of swing copper row can rotate, the other end is equipped with the wiring part, has the on -position of making the wiring part and working grounding terminal connection lock solid and the disconnecting position of separating and keeping safe electrical clearance, realizes the quick switching of one point common ground and the independent grounding mode of separate setting. The device is mainly used for 10kV distribution system, can adapt to different grounding requirements, and improves the safety and operation convenience.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to a complete set of equipment for a 10kV pole-mounted transformer with safety protection function. Background Technology

[0002] In the practical application and operation and maintenance of 10kV pole-mounted transformer stations, there are some aspects that need improvement. First, traditional grounding systems are usually designed and installed with a fixed mode, either a single common ground or separate independent grounding. This fixed design makes it difficult for the same equipment to adapt to the different grounding requirements of different regional power grids. For example, when upgrading the power grid or transferring equipment across regions, if the grounding mode required by the target operating area is different from the original configuration, grounding modification is necessary. This usually involves digging new grounding electrodes, laying down conductors, and changing the connection method. The process is cumbersome, consumes a lot of manpower, material resources, and time, and reduces the versatility and scheduling flexibility of the equipment.

[0003] For grounding connections, existing busbar structures often have a single function. When it is necessary to change the grounding operation mode, or to disconnect a specific grounding connection for testing or isolation during maintenance, the operation is not simple or direct enough. Sometimes tools are needed to disassemble the connection pieces, or there is a risk of misconnection or omission. There is a lack of a connection mechanism that can clearly indicate the status and facilitate quick and reliable switching. These issues pose certain challenges to on-site safe operation and maintenance and the adaptability of equipment. Utility Model Content

[0004] This utility model aims to solve the following problems: The grounding system of traditional 10kV pole-mounted transformer platforms usually adopts a fixed design, which cannot flexibly adapt to different power grid grounding requirements. For example, when switching between an ungrounded system and a low-resistance grounding system, grounding modifications are required, which involves a large amount of engineering work and is prone to safety accidents due to incorrect wiring. At the same time, exposed conductive parts lack effective protection, which may increase the risk of accidental contact. If the air gap at the installation position of the insulation-piercing grounding wire is insufficient, it is easy to cause discharge phenomena in harsh environments.

[0005] To achieve these objectives and other advantages of this utility model, the present utility model provides a complete set of 10kV pole-mounted transformer assembly with safety protection function, including a pole, a transformer installed on the pole, a fuse, and a surge arrester. The exposed conductive parts of the fuse and surge arrester are all fitted with matching insulating covers. An insulating piercing grounding wire is arranged below the fuse, and the nearest live part of the insulating piercing grounding wire maintains an air gap of more than 700mm between it and the upper terminal of the fuse. A grounding busbar is also provided, which is fixedly installed on the pole or the transformer housing. It includes an insulating base, and a protective grounding terminal and a working grounding terminal fixed to the insulating base in isolation from each other. The protective grounding terminal is used to connect the protective grounding down conductor of the transformer casing and the platform, and the working grounding terminal is used to connect the working grounding down conductor of the transformer neutral point; a swing copper busbar, one end of which is rotatably connected to the protective grounding terminal through a rotating shaft and maintains an electrical connection thereto, and the other free end of which is provided with a wiring part; the swing copper busbar has a connected position for connecting and locking the wiring part to the working grounding terminal, and a disconnected position for separating the wiring part from the working grounding terminal and maintaining a safe electrical clearance.

[0006] In grounding busbars, if the swinging copper busbar lacks a fixing structure when in the disconnected position, it is prone to displacement due to external vibration or force, which may lead to accidental contact with the working grounding terminal, damaging electrical isolation and increasing safety risks. Existing designs often rely on simple supports or suspended placement, which lacks stability and introduces uncertainty into maintenance operations. To solve this technical problem, this utility model further provides an insulating storage groove on the insulating base for accommodating and fixing the swinging copper busbar when in the disconnected position, and a buckle or locking screw for locking the swinging copper busbar is provided next to the insulating storage groove.

[0007] In grounding busbars, the creepage distance between the protective grounding terminal and the working grounding terminal may be insufficient when disconnected, especially in humid or dirty environments, easily leading to creepage and affecting insulation performance. Existing structures often use fixed partitions or no isolation design, which cannot be dynamically adjusted according to the grounding mode, limiting the improvement of safety. To solve this technical problem, this utility model further proposes an insulating partition that can be slidably installed between the protective grounding terminal and the working grounding terminal via a vertical guide rail; the insulating partition has a lowered position and a raised position; when in the lowered position, its top is lower than the swing path of the swinging copper busbar, making room for the copper busbar to connect; when in the raised position, the main body of the insulating partition stands upright between the two terminals to increase its creepage distance; the vertical guide rail is provided with a positioning structure, which consists of positioning beads set on the insulating partition, and positioning holes for the lowered position and the raised position set on the guide rail.

[0008] Internal components of grounding busbars, such as terminals and swing copper busbars, are often exposed to the external environment, easily accumulating dust, moisture, or foreign object intrusion, which may lead to decreased insulation performance or accidental contact. Existing cover structures are simple, lack sealing and observation functions, and are inconvenient for daily inspection and maintenance. Furthermore, the insulating flip cover of this invention is hinged to one side of the insulating base; the dimensions of the insulating flip cover are designed so that when closed, it can completely cover the protective grounding terminal, the working grounding terminal, the swing copper busbar, and the insulating partition; a through hole for observation is provided on the insulating flip cover opposite the protective grounding terminal and the working grounding terminal, and a transparent insulating viewing window cover is embedded inside the through hole, with a sealing ring on the edge of the insulating viewing window cover; the insulating base or the insulating flip cover is provided with a latch for locking when closed.

[0009] The connection surface between the swing copper busbar and the working grounding terminal is prone to loosening under long-term vibration or thermal expansion and contraction, leading to increased contact resistance and potentially causing overheating or electrical connection failure. Existing connection methods mostly use planar contact, which has poor vibration resistance and requires frequent maintenance. To address this technical problem, the contact surface between the free end of the swing copper busbar and the bolt in this invention is provided with multiple parallel raised ribs; the bolt connection surface of the working grounding terminal is provided with anti-slip textures that interlock with the raised ribs.

[0010] After operation, the swing copper busbar needs to be manually reset to the disconnected position. If this is forgotten or not reset properly, the grounding system may be in an incorrect state, increasing safety risks. Existing designs lack an automatic reset mechanism, relying on the accuracy of manual operation, which is prone to human error. To address this technical problem, this invention further incorporates a sleeve-type torsion spring fitted around the outside of the rotating shaft. The shaft has a fixing hole for positioning, and the inner end of the sleeve-type torsion spring is fastened to the fixing hole to achieve synchronous rotation with the shaft. The outer end of the sleeve-type torsion spring acts on a spring positioning post fixed on the insulating base. The sleeve-type torsion spring is pre-tightened, so that its torque drives the swing copper busbar to remain in or automatically reset to the disconnected position under normal conditions.

[0011] Preferably, the insulating cover is made of weather-resistant insulating material, and its inner wall shape is adapted to the outer contour of the fuse head or the lightning arrester terminal, and is fixed in place by an integrally formed snap-fit ​​structure or an external tightening band.

[0012] Preferably, the pole is a terminal double-pole structure, including a terminal pole and a straight pole, wherein the burial depth of the straight pole is 500mm greater than the burial depth of the terminal pole.

[0013] Preferably, it also includes a cable grounding outlet structure, which includes a cable protection pipe and pipe clamps for fixing the cable protection pipe. The pipe clamps are fixed to the base components of the pole or transformer platform by expansion bolts or welding.

[0014] This utility model has at least the following beneficial effects: Covering the exposed conductive parts of fuses and surge arresters with insulating covers effectively reduces the risk of accidental contact with live parts, improving operational safety. The insulating piercing grounding wire maintains an air gap of more than 700mm, avoiding discharge problems caused by insufficient gaps and enhancing the stability of the equipment in humid or polluted environments. The design of the grounding busbar and the swing copper busbar enables rapid switching of grounding modes. The on and off positions of the swing copper busbar correspond to a single common ground and separate independent grounding modes, respectively, allowing the same device to adapt to different power grid requirements without the need for civil engineering modifications, simplifying the operation and maintenance process. This structure reduces the risk of potential rise due to incorrect grounding modes, improves the versatility and reliability of the equipment, and clearly indicates the status through physical location, reducing the possibility of misoperation.

[0015] The insulating baffle moves vertically via a guide rail, rising to an upright position when disconnected. This significantly increases the creepage distance between the protective grounding terminal and the working grounding terminal, reducing the risk of creepage or arcing and improving insulation reliability. The positioning structure, through the cooperation of positioning beads and positioning holes, ensures the baffle is stably fixed in both the lowered and raised positions, preventing accidental slippage. Simultaneously, the lowered position provides space for the swinging copper busbar operation without affecting grounding mode switching. This design adapts to different operating conditions, enhances the device's adaptability to harsh environments, and is easy to operate, requiring no complex tools for adjustment.

[0016] The interlocking design of the raised ribs and anti-slip texture creates a mechanical interlock when the bolts are tightened, increasing the actual contact area and improving the stability and vibration resistance of the connection surface. This structure effectively prevents loosening of the connection due to external factors, maintains low contact resistance, reduces the risk of overheating, and enhances the reliability of the electrical connection. The raised ribs and anti-slip texture are easy to process, requiring no additional parts, achieving performance optimization at low cost, while also facilitating installation and maintenance and extending the service life of the connecting components.

[0017] The sleeve-type torsion spring provides a constant torque through pre-tightening, driving the swinging copper busbar to automatically reset to the disconnected position. This reduces the possibility of human error and ensures the safety of the grounding system when not in use. The inner end of the spring mates with the fixing hole of the rotating shaft, while the outer end acts on the spring positioning post, achieving stable force transmission and making the copper busbar reset process reliable and requiring no external intervention. This design simplifies the operation process, improves the degree of automation, and the spring's compact structure makes it easy to install and maintain, enhancing the overall durability and safety performance of the device.

[0018] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0019] Figure 1 This is a front view structural diagram of the complete set of 10kV pole-mounted transformer platform with safety protection function according to this utility model. Figure 2 This is a side view of the complete set of 10kV pole-mounted transformer platform with safety protection function according to this utility model. Figure 3 This is a schematic diagram of the grounding busbar of this utility model in the connection position. Figure 4 This is a schematic diagram of the planar structure of the grounding busbar of this utility model at the disconnected position; Figure 5 This is a side view of the grounding busbar of this utility model. Figure 6 This is a schematic diagram illustrating the principle and structure of the swing copper busbar of this utility model.

[0020] Among them, there are: pole 1, top sleeve 2, low-voltage tension insulator string 3, low-voltage cable clamp 4, surge arrester stretcher 5, transformer 6, transformer stretcher 7, JP cabinet 8, protective grounding down conductor 9, working grounding down conductor 10, ceramic rod 11, ceramic rod stretcher 12, transformer frame stretcher 13, high-voltage wire 14, fuse 15, surge arrester 16, low-voltage cable 17, grounding busbar 18, insulating base 19, protective grounding terminal 20, working grounding terminal 21, swing copper busbar 22, wiring section 23, insulating storage groove 24, insulating partition 25, descending position positioning hole 26, rising position positioning hole 27, cable grounding outlet structure 28, raised rib 29, torsion spring 30, spring positioning post 31, insulating cover 32, insulating flip cover 33, rotating shaft 34, and insulating piercing grounding wire 35. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the embodiments, so that those skilled in the art can implement it based on the description.

[0022] like Figure 1-4 As shown, this utility model discloses a complete set of 10kV pole-mounted transformer platform with safety protection function, including a pole 1, on which a transformer 6, a fuse 15, and a surge arrester 16 are installed. The exposed conductive parts of the fuse 15 and the surge arrester 16 are each fitted with a matching insulating cover 32. The insulating cover 32 can be made of weather-resistant insulating material, such as silicone rubber or epoxy resin. Its inner wall shape is adapted to the outer contour of the fuse 15's terminal block or the surge arrester 16's wiring terminal, and is securely fixed by an integrally formed snap-fit ​​structure or an external tightening strap. An insulating piercing grounding wire 35 is arranged below the fuse 15. The nearest live part of this insulating piercing grounding wire maintains an air gap of more than 700mm between it and the upper terminal block of the fuse 15, such as 700mm, 800mm, or 1000mm. The grounding busbar 18 is fixedly installed on the housing of the pole 1 or transformer 6. The grounding busbar 18 includes an insulating base 19, which can be made of nylon or bakelite. The protective grounding terminal 20 and the working grounding terminal 21 are fixedly and isolated from each other on the insulating base 19. The protective grounding terminal 20 is used to connect the protective grounding down conductor 9 of the transformer housing and the platform, and the working grounding terminal 21 is used to connect the working grounding down conductor 10 of the transformer neutral point. One end of the swing copper busbar 22 is rotatably connected to the protective grounding terminal 20 via a rotating shaft 34 and maintains an electrical connection with it. The other free end is provided with a wiring part 23. The swing copper busbar 22 can be made of T2 copper. The swing copper busbar 22 has a connected position and a disconnected position. When in the connected position, the wiring part 23 is connected to the working grounding terminal 21 and locked with bolts to realize the electrical connection between the protective grounding and the working grounding, forming a single-point common ground mode. When the work station is disconnected, the wiring part 23 is separated from the working ground terminal 21 and a safe electrical clearance is maintained, for example, the clearance is greater than 100mm, forming a separate independent grounding mode, so that the protective ground and the working ground are connected to the independent grounding electrode through their respective down conductors.

[0023] When switching grounding modes is required, the operator achieves this by changing the position of the swing copper busbar 22. In the single-point common grounding mode, the swing copper busbar 22 rotates to the connected position, making the wiring part 23 contact the working grounding terminal 21 and locking it with bolts. At this time, the protective grounding terminal 20 and the working grounding terminal 21 are electrically connected through the swing copper busbar 22, which is suitable for 10kV ungrounded systems or grounding systems through arc suppression coils. In the separate independent grounding mode, the swing copper busbar 22 rotates to the disconnected position, separating the wiring part 23 from the working grounding terminal 21, maintaining a safe electrical clearance, and isolating the protective grounding and the working grounding from each other, which is suitable for low-resistance grounding systems. The rotating shaft of the swing copper busbar 22 can be installed on the protective grounding terminal 20. A cylindrical torsion spring 30 can be sleeved on the outside of the rotating shaft. The inner end of the torsion spring 30 is fastened to the fixing hole of the rotating shaft, and the outer end acts on the spring positioning post 31 on the insulating base 19, so that the swing copper busbar 22 is held in the disconnected position under normal conditions or automatically resets to the disconnected position. An insulating partition 25 is slidably mounted between the protective grounding terminal 20 and the working grounding terminal 21 via a vertical guide rail. When the swing copper busbar 22 is in the ON position, the insulating partition 25 descends to the DR position, with its top lower than the swing path of the swing copper busbar 22. When the swing copper busbar 22 is in the OFF position, the insulating partition 25 rises to the UP position, increasing the creepage distance between the two terminals. An insulating flip cover 33 is hinged to one side of the insulating base 19. When closed, it covers the protective grounding terminal 20, the working grounding terminal 21, the swing copper busbar 22, and the insulating partition 25. A through hole is provided on the insulating flip cover 33 opposite the terminal position, and a transparent insulating viewing window is installed in the through hole for easy observation of the internal status and grounding mode.

[0024] This device reduces the risk of accidental contact by covering exposed conductive parts with an insulating cover 32; the insulating piercing grounding wire maintains a safe air gap to prevent arc discharge. Through the position switching of the swing copper busbar 22, this device achieves rapid conversion between two grounding modes: single-point common ground and separate independent grounding, solving the problems of poor versatility and safety hazards caused by the fixed nature of traditional grounding systems. In existing technologies, the grounding system of pole-mounted transformer platforms is fixed in one mode during design and installation, and cannot be flexibly switched according to the requirements of the on-site power grid. When equipment is transferred or the power grid is upgraded, grounding modifications must be made, such as secondary excavation of grounding electrodes and modification of down conductors, which involves a large amount of engineering work and is prone to safety accidents due to incorrect wiring. This implementation method, through the integrated design of the grounding busbar 18 and the movable structure of the swing copper busbar 22, transforms complex grounding modifications into simple on-site operations, avoiding the risk of potential rise due to incorrect mode, improving the equipment's ability to adapt to different grounding systems, simplifying the operation and maintenance process, and reducing the total life cycle cost.

[0025] In another embodiment, an insulating storage groove 24 is provided on the insulating base 19. This groove 24 can be located on the side, end, or top of the insulating base 19, and is used to accommodate and secure the free end of the swing copper busbar 22 when it is in the disconnected position. The insulating storage groove 24 can be made of the same material as the insulating base 19, such as nylon, bakelite, or reinforced plastic. Its shape is adapted to the contour of the free end of the swing copper busbar 22, and its depth can be 20mm to 50mm, such as 30mm, to ensure that the copper busbar can be fully embedded and remain stable. A locking device is provided next to the insulating storage groove 24. This locking device can be a snap-fit ​​or a locking screw. The snap-fit ​​can be a one-piece molded plastic snap-fit, and the locking screw can be an M4 or M5 stainless steel screw, fixed to the insulating base 19 through a threaded hole, to lock the swing copper busbar 22 in the disconnected position and prevent accidental displacement.

[0026] When the swing copper busbar 22 rotates from the connected position to the disconnected position, its free end is embedded in the insulating storage groove 24. The operator uses clips or locking screws to fix the swing copper busbar 22 in this position, ensuring that it maintains a safe electrical clearance from the working ground terminal 21. The clips can be locked by pressing the swing copper busbar 22, while the locking screws are fixed by rotating. During installation, it is necessary to ensure that the tightening force is moderate to avoid damaging the insulation material. The inner wall of the insulating storage groove 24 can be provided with anti-slip texture or rubber padding to enhance the fixing effect. At the same time, the position of the insulating storage groove 24 should be designed to avoid other conductive parts to prevent accidental contact.

[0027] This embodiment, through the insulating storage groove 24 and the locking device, provides stable housing and fixation for the swinging copper busbar 22 when in the disconnected position, preventing displacement of the copper busbar due to vibration or external force, thereby maintaining a safe electrical clearance. Grounding busbars typically lack dedicated storage structures, and the swinging copper busbar may be suspended or supported by simple supports in the disconnected state, making it prone to shaking or accidental contact, increasing operational risks. This embodiment, by integrating the insulating storage groove 24 and the locking device, ensures the reliability and safety of the disconnected state and simplifies maintenance operations.

[0028] In another embodiment, the insulating flip cover 33 is hinged to one side of the insulating base 19 by hinges. The hinges can be made of nylon or stainless steel, and there can be two or three hinges arranged symmetrically. The insulating flip cover 33 can be made of the same material as the insulating base 19, such as engineering plastics or fiber-reinforced composite materials. Its dimensions are set such that when closed, it can completely cover the protective grounding terminal 20, the working grounding terminal 21, the swing copper busbar 22, and the insulating partition 25, and can extend 10mm to 20mm (e.g., 15mm) beyond the edges of the internal components. A through hole for observation is provided on the insulating flip cover 33 opposite to the protective grounding terminal 20 and the working grounding terminal 21. The diameter of the through hole can be 20mm to 30mm (e.g., 25mm). A transparent insulating window cover is embedded inside the through hole. The insulating window cover can be made of polycarbonate or plexiglass and has a thickness of 3mm to 5mm, preferably 4mm. A sealing ring is provided on the edge of the insulating window cover. The sealing ring can be made of silicone rubber or nitrile rubber and has a cross-sectional diameter of 2mm. The insulating base 19 or the insulating flip cover 33 is provided with a latch for locking when closed. The latch can be a rotating latch made of stainless steel or engineering plastic, and the number can be one or two pairs.

[0029] When it is necessary to operate or inspect the interior of the grounding busbar, the operator can open the insulating flip cover 33 by rotating it around the hinge axis to expose the internal terminals and connecting components. When closed, the insulating flip cover 33 is locked to the insulating base 19 via a latch, forming a closed protective structure to prevent the intrusion of external foreign objects or accidental contact by personnel. The internal terminal connection status and the position of the swing copper busbar 22 can be observed through the insulating viewing window cover, while the sealing ring effectively prevents dust and moisture from entering. When locking the latch, ensure even force to guarantee a tight fit between the cover and the base.

[0030] This embodiment achieves comprehensive protection and visual management of the internal components of the grounding busbar through the insulating flip cover 33 and its associated structure. Existing grounding busbars often employ open structures or simple covers, lacking effective sealed observation functions and reliable locking mechanisms, which may lead to dust accumulation, moisture absorption, or accidental contact with internal components. This embodiment, through an insulating flip cover with a sealed viewing window and a snap-locking structure, improves the protection level while ensuring observation functionality, extending equipment lifespan, and reducing maintenance frequency.

[0031] In another embodiment, the connection surface of the free end of the swing copper busbar 22 and the bolted connection surface of the working grounding terminal 21 is provided with multiple parallel raised ribs 29. The raised ribs 29 can be integrally formed from the same T2 copper material as the copper busbar body, and the number can be 3 to 5, such as 4. The cross-sectional shape of the raised ribs 29 can be rectangular or trapezoidal, the height can be 1mm to 2mm, such as 1.5mm, the width can be 2mm to 3mm, such as 2.5mm, and the spacing between adjacent ribs can be 2mm to 5mm, such as 4mm. The bolted connection surface of the working grounding terminal 21 is provided with anti-slip textures that interlock with the raised ribs 29. The anti-slip textures can be mesh-like or straight-line textures formed by knurling or milling, and the texture depth can be 0.5mm to 1mm, such as 0.8mm.

[0032] When the swing copper busbar 22 rotates to the connection position, the operator presses the wiring part 23 firmly onto the connection surface of the working ground terminal 21 and locks it with bolts. At this time, the raised ribs 29 and the anti-slip texture form an interlocking structure. Under the action of bolt preload, the raised ribs 29 undergo slight plastic deformation and embed themselves into the anti-slip texture, increasing the actual contact area. After the bolts are fully tightened, this interlocking structure can effectively prevent relative sliding of the connection surface due to vibration or thermal expansion and contraction, maintaining a stable distribution of contact pressure. During installation, it is necessary to ensure that the direction of the raised ribs 29 and the direction of the anti-slip texture are at a certain angle, preferably perpendicular to each other, to achieve the best interlocking effect.

[0033] This embodiment improves the mechanical interlocking capability and electrical connection stability of the contact surface through the interlocking design of the raised ribs 29 and the anti-slip texture. Currently, grounding connections typically use planar contact or simple texture designs, which are prone to loosening under long-term vibration, leading to increased contact resistance or even overheating. This embodiment significantly enhances vibration resistance and contact reliability through precisely matched raised ribs and anti-slip textures, while maintaining structural simplicity without the need for additional components.

[0034] In another embodiment, a sleeve-type torsion spring 30 is sleeved on the outside of the rotating shaft of the oscillating copper busbar 22. The torsion spring 30 can be a standard part made of carbon steel or stainless steel, and its inner diameter can be adapted to the diameter of the rotating shaft, for example, the diameter of the rotating shaft can be 8mm to 12mm, such as 10mm. A fixing hole for positioning is provided on the shaft body. The fixing hole can be a through hole or a blind hole, with a diameter of 2mm to 3mm, such as 2.5mm, and a depth of 5mm to 8mm. The inner end of the sleeve-type torsion spring 30 can be a straight or L-shaped structure, fastened in the fixing hole to achieve synchronous rotation with the rotating shaft. The outer end of the sleeve-type torsion spring 30 acts on a spring positioning post 31 fixedly mounted on the insulating base 19. The spring positioning post 31 can be made of nylon or metal, with a diameter of 4mm to 6mm, such as 5mm, and a height of 10mm to 15mm. The sleeve-type torsion spring 30 is pre-tightened, and the pre-tightening angle can be from 15 degrees to 30 degrees, such as 20 degrees, so that its torque drives the swing copper busbar 22 to remain in or automatically reset to the disconnected position under normal conditions.

[0035] When the operator rotates the swing copper busbar 22 from the disconnect position to the connection position, it needs to overcome the preload of the sleeve-type torsion spring 30. At this time, the rotating shaft drives the inner end of the spring to rotate synchronously, while the outer end is fixed on the spring positioning post 31, allowing the spring to further store torsional energy. When the swing copper busbar 22 reaches the connection position and is connected and locked to the working ground terminal 21, the spring maintains a certain torque. When it is necessary to disconnect, the operator loosens the locking bolt, the torque energy stored in the sleeve-type torsion spring 30 is released, driving the rotating shaft to rotate in the opposite direction, causing the swing copper busbar 22 to automatically return to the disconnect position. During installation, it is necessary to ensure that the inner end is reliably inserted into the fixing hole and that the outer end maintains stable contact with the spring positioning post 31 to prevent the spring from dislodging.

[0036] This embodiment achieves the automatic holding and reset function of the swing copper busbar 22 in the disconnected state through the pre-tightening installation of the sleeve-type torsion spring 30. Currently, the swing copper busbars of grounding busbars mostly adopt non-powered structures or simple limiters, requiring manual reset after operation, which poses safety hazards such as forgetting to reset or incomplete reset. This embodiment, through the constant driving force of the torsion spring, ensures that the copper busbar can automatically and reliably return to the safe disconnected position, reducing the possibility of human error and improving the automation level of safety protection.

[0037] In another embodiment, the insulating cover 32 can be made of a weather-resistant insulating material, such as silicone rubber, epoxy resin, or polycarbonate, with a material thickness of 1 mm to 3 mm. Its inner wall shape is adapted to the outer contour of the fuse 15's terminal or the surge arrester 16's wiring terminal. For example, for a cylindrical terminal, the inner wall diameter can match the terminal's outer diameter; for a rectangular terminal, the inner wall can be designed as a corresponding rectangular cavity with a depth of 30 mm to 50 mm, such as 40 mm. The fixing method can be an integrally formed snap-fit ​​structure, with snaps made of the same material as the cover, and two to four snaps evenly distributed along the edge of the cover; or an external tightening strap can be used, made of nylon or stainless steel, with a width of 10 mm to 15 mm, such as 12 mm, and a tightening force of 50 N to 100 N. The insulating cover 32 is fastened to the terminal of the fuse 15 or the terminal of the surge arrester 16 by means of a buckle or a fastening strap. During installation, it is necessary to ensure that the cover completely covers the exposed conductive parts and maintains a safe distance of more than 10mm from surrounding components.

[0038] In another embodiment, pole 1 is a terminal double-pole structure, including a terminal pole and a straight pole. Both the terminal pole and the straight pole can be made of prestressed concrete, with a pole tip diameter ranging from 190mm to 230mm, such as 210mm. The embedment depth of the terminal pole can be from 1800mm to 2200mm, such as 2000mm; the embedment depth of the straight pole is 500mm greater than that of the terminal pole, i.e., from 2300mm to 2700mm, such as 2500mm. The lateral spacing between the two poles can be from 1500mm to 2500mm, such as 2000mm, and they are arranged in parallel. The terminal pole mainly bears the line terminal tension, while the straight pole mainly bears the vertical load and enhances structural stability. The pole top heights must be consistent and can be calibrated using a level.

[0039] In another embodiment, the underground cable exit structure 28 includes a cable protection conduit and clamps for securing the cable protection conduit. The cable protection conduit can be made of rigid PVC, MPP, or carbon corrugated pipe, with an inner diameter of 80mm to 150mm (e.g., 100mm), a wall thickness of 4mm to 6mm (e.g., 5mm), and a bending radius not less than 15 times the pipe diameter. The clamps can be made of galvanized steel or stainless steel strip with a double-hoop structure, a width of 30mm to 50mm (e.g., 40mm), and a thickness of 2mm to 3mm. The clamps are fixed to the base of the pole 1 or transformer platform using expansion bolts or welding. The expansion bolts can be M10 or M12, with a length of 80mm to 120mm; fillet welds can be used, with a weld leg height of 4mm to 6mm. During installation, first determine the cable exit point. Mark the pipe clamp fixing points on pole 1 or the transformer base structure. The spacing between adjacent pipe clamps can be 1500mm to 2000mm, such as 1800mm. Drill holes at the marked points using an electric drill, matching the hole diameter to the expansion bolt specifications. Insert the expansion bolts into the holes and tighten them to secure the pipe clamps; alternatively, weld the pipe clamps directly to the base structure. Then, place the cable protection pipe inside the pipe clamp, adjust the clamp straps to ensure they fit snugly against the outer wall of the protection pipe, and tighten the clamp bolts with a special tool. The cable must be laid smoothly, and an insulating sleeve should be installed at the inlet of the protection pipe to prevent cable cuts.

[0040] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for this utility model. Other modifications can be easily made by those skilled in the art.

Claims

1. A complete set of equipment for a 10kV pole-mounted transformer platform with safety protection function, comprising a pole, a transformer installed on the pole, a fuse, and a surge arrester, characterized in that, The exposed conductive parts of the fuse and surge arrester are all covered with insulating covers of matching shape; an insulating piercing grounding wire is arranged below the fuse, and the nearest live part of the insulating piercing grounding wire maintains an air gap of more than 700mm between it and the upper terminal of the fuse; A grounding busbar is also provided, which is fixedly installed on the pole or transformer housing. The grounding busbar includes an insulating base, and a protective grounding terminal and a working grounding terminal fixed to the insulating base in isolation from each other. The protective grounding terminal is used to connect the protective grounding down conductor of the transformer housing and the platform, and the working grounding terminal is used to connect the working grounding down conductor of the transformer neutral point. A swing copper busbar is provided, one end of which is rotatably connected to the protective grounding terminal through a rotating shaft and maintains an electrical connection thereto, and the other free end of which is provided with a wiring part. The swing copper busbar has a connection position for connecting and locking the wiring part to the working grounding terminal, and a disconnect position for separating the wiring part from the working grounding terminal and maintaining a safe electrical clearance.

2. The complete set of equipment for a 10kV pole-mounted transformer platform with safety protection function according to claim 1, characterized in that, The insulating base is provided with an insulating storage groove for accommodating and fixing the swinging copper busbar when the disconnection position is reached, and a buckle or locking screw for locking the swinging copper busbar is provided next to the insulating storage groove.

3. The complete set of equipment for a 10kV pole-mounted transformer platform with safety protection function according to claim 2, characterized in that, An insulating partition is slidably installed between the protective grounding terminal and the working grounding terminal via a vertical guide rail; The insulating partition has a lowered position and a raised position; when in the lowered position, its top is lower than the swing path of the swinging copper busbar, making room for the copper busbar to connect; when in the raised position, the main body of the insulating partition stands upright between the two terminals to increase its creepage distance. The vertical guide rail is provided with a positioning structure, which consists of a positioning bead set on the insulating partition, and a descending positioning hole and a rising positioning hole set on the guide rail.

4. The complete set of equipment for a 10kV pole-mounted transformer platform with safety protection function according to claim 3, characterized in that, An insulating flip cover is hinged to one side of an insulating base; the insulating flip cover is sized such that when closed, it can completely cover the protective grounding terminal, the working grounding terminal, the swing copper busbar, and the insulating partition; a through hole for observation is provided on the insulating flip cover opposite the protective grounding terminal and the working grounding terminal, and a transparent insulating window cover is embedded inside the through hole, the edge of which is provided with a sealing ring; the insulating base or the insulating flip cover is provided with a latch for locking when closed.

5. The complete set of equipment for a 10kV pole-mounted transformer platform with safety protection function according to claim 4, characterized in that, The contact surface between the free end of the swing copper busbar and the bolt is provided with multiple parallel raised ribs; the bolt connection surface of the working grounding terminal is provided with anti-slip textures that interlock with the raised ribs.

6. The complete set of equipment for a 10kV pole-mounted transformer platform with safety protection function according to claim 5, characterized in that, A sleeve-type torsion spring is sleeved on the outside of the rotating shaft; the shaft body is provided with a fixing hole for positioning, and the inner end of the sleeve-type torsion spring is fastened to the fixing hole to achieve synchronous rotation with the rotating shaft; the outer end of the sleeve-type torsion spring acts on the spring positioning post fixed on the insulating base; the sleeve-type torsion spring is pre-tightened so that its torque drives the swing copper busbar to remain in or automatically reset to the disconnected position under normal conditions.

7. The complete set of equipment for a 10kV pole-mounted transformer platform with safety protection function according to claim 1, characterized in that, The insulating cover is made of weather-resistant insulating material, and its inner wall shape is adapted to the outer contour of the fuse head or the lightning arrester terminal. It is fixed in place by an integrally formed snap-fit ​​structure or an external tightening band.

8. The complete set of equipment for a 10kV pole-mounted transformer platform with safety protection function according to claim 1, characterized in that: The pole is a terminal double-pole structure, consisting of a terminal pole and a straight pole, with the straight pole being buried 500mm deeper than the terminal pole.

9. The complete set of equipment for a 10kV pole-mounted transformer platform with safety protection function according to claim 1, characterized in that: It also includes a cable underground exit structure, which includes a cable protection pipe and pipe clamps for fixing the cable protection pipe. The pipe clamps are fixed to the base components of the pole or transformer platform by expansion bolts or welding.

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