Pole-mounted single-phase transformer

Abstract

The invention relates to a pole-mounted single-phase transformer, and relates to the technical field of intelligent power grids, the pole-mounted single-phase transformer comprises a cylindrical main body, and the cylindrical main body is provided with a low-voltage bushing and a high-voltage bushing; a plurality of supporting frames are fixedly arranged on the peripheral face, away from the low-voltage sleeve, of the cylindrical body, connecting plates are rotationally installed on the outer edges of the top face and the bottom face of the cylindrical body, and protection plates are vertically and fixedly arranged on the side face edges, away from the cylindrical body, of the connecting plates. The two connecting plates can rotate back to back to a mounting state parallel to the axis of the cylindrical main body and are fixed when equipment is mounted and applied, and the protective plates rotate to a protective state parallel to the end surface of the cylindrical main body at the same time; a scraping plate is rotationally mounted on the side face, away from the protective plate, of the connecting plate, and a driving part for driving the scraping plate to rotate is fixedly arranged on the side face, facing the protective plate, of the connecting plate; the driving piece drives the scraper to rotate, the scraper can specifically clean plants attached to the outer side face of the connecting plate, and the plants are prevented from further extending to cover the equipment.

Description

Technical Field

[0001] This application relates to the technical field of smart grids, and in particular to a pole-mounted single-phase transformer. Background Technology

[0002] In the construction and operation and maintenance system of smart grids, single-phase pole-mounted transformers (also known as single-phase power isolation transformers) are one of the key power distribution equipment. Their core feature lies in the independent deployment design of the high-voltage and low-voltage windings. This structure not only significantly improves the operational safety of the equipment and effectively avoids potential risks such as short circuits and leakage currents associated with traditional wiring cabinets, but also significantly optimizes the equipment's weight parameters. Compared to traditional transformers, this type of equipment is compact and lightweight, requires no complex installation base, and can typically be directly fixed to a single utility pole. It is widely applicable to branch line power supply scenarios in urban and rural power distribution networks, providing stable power supply for distributed users.

[0003] In related technologies, a cylindrical single-phase pole-mounted transformer comprises three parts: a cylindrical body, electrical components, and an installation and fixing mechanism. The cylindrical body, as the core load-bearing component, has low-voltage bushings precisely fitted onto its outer circumference to achieve low-voltage power output, while a high-voltage bushing is installed at the top for connection to a high-voltage line. Heat dissipation fins and several high-strength support frames are fixed to the outer circumference of the cylindrical body, and these support frames are tightly fitted and fixed to the outer circumference of the utility pole using adjustable fixing clamps. This installation structure allows for strict control of the distance between the bottom surface of the cylindrical body and the ground, ensuring compliance with the safety distance requirements in power equipment installation specifications and enabling stable deployment of the equipment in different environments.

[0004] However, when the aforementioned existing technical solutions are applied in natural outdoor environments, vines, climbing shrubs, and other plants possess strong climbing and growth characteristics, allowing them to continuously grow upwards using utility poles as support. After a certain growth period, these climbing plants gradually extend to the area of ​​the pole-mounted transformer, eventually covering the top of the equipment. This phenomenon can lead to multiple adverse consequences: firstly, it can block the heat dissipation channels of electrical components, causing abnormally high operating temperatures and reducing power supply efficiency; secondly, the conductive nature of plant branches and leaves or their ability to carry moisture can cause a decrease in the insulation performance of high-voltage and low-voltage bushings, or even short-circuit faults, seriously threatening the safety of power grid operation, thus indicating room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide a pole-mounted single-phase transformer to solve the problem in the above-mentioned related technologies where outdoor climbing plants cover the top of the equipment, blocking the heat dissipation channel and causing temperature rise and fall efficiency, and also causing the bushing insulation to drop and short circuit to cause power grid safety hazards.

[0006] The pole-mounted single-phase transformer provided in this application adopts the following technical solution: A pole-mounted single-phase transformer includes a cylindrical body. A low-voltage bushing is installed on the outer circumferential surface of the cylindrical body, and a high-voltage bushing is installed on the top. Several support frames are fixedly provided on the outer circumferential surface of the cylindrical body away from the low-voltage bushing. Connecting plates are rotatably installed on the outer edges of the top and bottom surfaces of the cylindrical body. A protective plate is vertically fixed on the side edge of the connecting plate away from the cylindrical body. When the equipment is installed and used, the two connecting plates can rotate in opposite directions to an installation state parallel to the axis of the cylindrical body and be fixed. At this time, the protective plate simultaneously rotates to a protective state parallel to the end face of the cylindrical body. A scraper is rotatably installed on the side of the connecting plate away from the protective plate, and a driving component for rotating the scraper is fixed on the side facing the protective plate. The rotating surface of the scraper is parallel to the side of the connecting plate away from the protective plate.

[0007] By adopting the above technical solution and utilizing the switching between the connecting plate and the protective plate, a protective structure parallel to the end face of the cylindrical main body is formed during equipment installation and application. This effectively shields and protects the top and bottom surfaces of the cylindrical main body, physically preventing climbing plants from approaching the core area of ​​the equipment. Simultaneously, a drive mechanism rotates a scraper, which selectively removes plants clinging to the outer side of the connecting plate, preventing further plant growth and coverage of the equipment. This design solves the problem of climbing plants blocking heat dissipation channels in the wild, leading to reduced equipment efficiency due to temperature fluctuations. It also prevents conductive plant branches and leaves or carrying moisture from causing a decrease in the insulation performance of high-voltage and low-voltage bushings and short-circuit faults. This significantly improves the operational stability of the equipment in outdoor environments, ensures power grid safety, and the structural design is compatible with existing installation methods without requiring significant modifications to the overall structure, making it highly practical.

[0008] Optionally, extension plates that are fixedly connected to both sides of the connecting plate are provided at both sides of the protective plate.

[0009] By adopting the above technical solution, the protective plate forms an enclosed protective structure, which can fill the gaps on both sides of the protective plate and the connecting plate, significantly increasing the protective coverage of the cylindrical main body end face and effectively preventing climbing plants from intruding from the side gaps. At the same time, it enhances the overall structural stability of the protective component, avoids deformation of the protective plate and connecting plate under stress, further ensures the normal operation of the cleaning component, and improves its adaptability to the field environment.

[0010] Optionally, when the protective plate is in the installation state, a number of movable wheels are fixed on the side away from the cylindrical body; when the equipment moves a short distance, the two connecting plates can rotate towards each other to a support state perpendicular to the axis of the cylindrical body and be fixed, and the two protective plates at this time can simultaneously rotate to a moving state parallel to the axis of the cylindrical body, and the sides of the two protective plates near the movable wheels can be flipped to face the ground.

[0011] By adopting the above technical solution and utilizing the bidirectional switching between the connecting plate and the protective plate, the equipment can perform both protective and mobile functions. When the equipment is moved short distances, the connecting plates rotate towards each other to the support state, while the protective plate simultaneously switches to the mobile state. After flipping, the mobile wheels touch the ground to form support, enabling convenient movement without additional hoisting equipment and significantly reducing labor and transportation costs. During installation and application, it can switch back to the protective state to ensure equipment safety, achieving "one item, two uses." This design is suitable for complex field maintenance scenarios, improves the flexibility of equipment transfer, and features simple structural switching without affecting core power supply functions, significantly enhancing practicality and adaptability.

[0012] Optionally, a support plate parallel to the protective plate is fixed on the side of the connecting plate facing the protective plate, the driving member is located between the support plate and the protective plate, and the side of the support plate away from the protective plate abuts against the end face of the cylindrical body when the connecting plate is in the installation state.

[0013] By adopting the above technical solution, the support plate can, on the one hand, abut against the end face of the cylindrical main body when the connecting plate is in the installation state, providing stable support for the connecting plate, enhancing the overall structural rigidity of the protective components, preventing the connecting plate from deforming due to external forces or its own weight, and ensuring the stable operation of the protective and cleaning functions; on the other hand, the driving component can be confined in the sealed space between the support plate and the protective plate, forming double protection, effectively blocking impurities such as outdoor dust, rainwater, and plant debris from corroding the driving component, reducing the probability of driving component failure, extending its service life, and at the same time not affecting the state switching of the protective plate and the connecting plate, thus improving the overall reliability of the equipment.

[0014] Optionally, both ends of the cylindrical body are rotatably connected to elastic locking plates with elastic elongation properties. The elastic locking plates can rotate in the direction close to the connecting plate to a first locking state parallel to the end face of the cylindrical body, and in the direction away from the connecting plate to a second locking state perpendicular to the end face of the cylindrical body. The protective plate has a first locking groove on its inner side facing the connecting plate, and the support plate has a second locking groove on its side away from the protective plate. When the elastic locking plate is in the first locking state, the end of the elastic locking plate away from the cylindrical body can be engaged in the second locking groove when the connecting plate is in the support state. When the elastic locking plate is in the second locking state, the end of the elastic locking plate away from the cylindrical body can be engaged in the first locking groove when the connecting plate is in the installation state.

[0015] By adopting the above technical solution and utilizing the two locking states of the elastic locking plate and the corresponding locking groove design, precise and stable locking of the protective components in both the installed and moving states can be achieved. This prevents the protective components from loosening or shifting during equipment operation or movement, ensuring the stable performance of protection, cleaning, and movement functions. The elastic locking plate combines rotation adjustment and elastic extension characteristics, making operation convenient and allowing for state switching without additional locking components. Furthermore, in the installed state, the elastic locking plate covers the gap between the support plate and the protective plate, further protecting the internal drive components, reducing the intrusion of external impurities, and improving the structural reliability and service life of the equipment in complex outdoor environments.

[0016] Optionally, the elastic locking plate has a traction handle fixed on the side away from the connecting plate when it is in the second locked state.

[0017] By adopting the above technical solution, the elastic locking plate can be easily switched between the first and second locking states through force traction, without the need for additional tools, greatly reducing the difficulty of operation and improving the efficiency of equipment state switching. At the same time, the handle's grip structure allows operators to apply force accurately in high-altitude or field scenarios, reducing the safety risks of operation and maintenance, and adapting to the actual needs of outdoor operation and maintenance of power grid equipment.

[0018] Optionally, the elastic locking plate has a first inclined surface at the outer edge of its end away from the cylindrical body.

[0019] By adopting the above technical solution, the first inclined surface can be used to guide the elastic locking plate end to quickly slide into the corresponding locking groove, simplifying the locking operation steps, improving the efficiency of state switching, and reducing the assembly difficulty.

[0020] Optionally, a second inclined surface is provided at the opening edge of both the first locking groove and the second locking groove.

[0021] By adopting the above technical solution, the cooperation of the first inclined surface and the second inclined surface forms a guiding structure, which can guide the elastic locking plate to quickly and accurately lock into the locking groove, reduce the difficulty of locking operation, and improve the smoothness and efficiency of state switching.

[0022] Optionally, an elastic locking member is provided on the outer periphery of the end of the elastic locking plate away from the cylindrical body, and positioning grooves for the elastic locking member to be engaged are provided on the inner walls of the first locking groove and the second locking groove.

[0023] By adopting the above technical solution, the cooperative design of the elastic locking component and the positioning groove can form a secondary positioning after the elastic locking plate is engaged in the locking groove, preventing the locking plate from loosening and slipping during equipment operation or movement, and greatly improving the stability of the locking structure. At the same time, this design requires no additional fastening components, is easy to operate, does not affect the efficiency of state switching, and is suitable for the operation and maintenance needs of complex field environments.

[0024] Optionally, the elastic snap-fit ​​component includes a compression spring and an arc-shaped protrusion. The outer periphery of the elastic locking plate is provided with a placement groove for the compression spring and the arc-shaped protrusion to be inserted. The compression spring squeezes one side of the arc-shaped protrusion, causing a part of the arc-shaped protrusion to protrude from the opening of the placement groove. The outer surface of the protruding part of the arc-shaped protrusion is an arc surface, and the arc length corresponding to this arc surface is a minor arc.

[0025] By adopting the above technical solution, the elastic snap-fit ​​structure of the compression spring and the arc-shaped protrusion can automatically snap the protrusion into the positioning groove with the help of the compression spring force, so as to achieve a stable connection between the locking plate and the locking groove. The arc surface design and inferior arc structure of the protrusion can reduce the frictional resistance when the locking plate is inserted and removed, making the state switching smoother, and no additional tools are required. It is suitable for outdoor high-altitude operation and maintenance scenarios, improving the convenience of operation and structural reliability.

[0026] In summary, this application includes the following beneficial technical effects: This application utilizes the switching between the connecting plate and the protective plate to form a protective structure parallel to the end face of the cylindrical main body during equipment installation and application, effectively shielding and protecting the top and bottom surfaces of the cylindrical main body, and physically preventing climbing plants from approaching the core area of ​​the equipment; at the same time, with the help of the driving component, the scraper is rotated, and the scraper can selectively clean the plants attached to the outer side of the connecting plate, preventing the plants from further extending and covering the equipment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram illustrating the installation and assembly of the protective components in an embodiment of this application; Figure 3 This is a schematic diagram illustrating the installation and cooperation of the connecting plate and the protective plate in an embodiment of this application; Figure 4 This is a partial cross-sectional view of the installation and mating of the drive components in an embodiment of this application; Figure 5 This is a schematic diagram illustrating the installation and cooperation of the moving wheel and the locking component in an embodiment of this application; Figure 6 This is a partial cross-sectional view of the installation and fit of the elastic locking plate in an embodiment of this application; Figure 7 yes Figure 6 An enlarged schematic diagram of part A in the middle.

[0028] In the diagram, 1. Cylindrical main body; 11. Low-pressure sleeve; 12. High-pressure sleeve; 13. Support frame; 2. Protective component; 21. Connecting plate; 22. Protective plate; 221. First locking groove; 23. Extension plate; 24. Moving wheel; 3. Cleaning component; 31. Scraper; 32. Driving component; 321. Drive motor; 322. Mobile power supply; 4. Locking component; 41. Support plate; 411. Second locking groove; 412. Positioning groove; 413. Second inclined surface; 42. Elastic locking plate; 421. Placement groove; 422. First inclined surface; 43. Traction handle; 44. Elastic snap-fit ​​component; 441. Compression spring; 442. Arc-shaped protrusion. Detailed Implementation

[0029] The present application will be further described in detail below with reference to all the accompanying drawings. Example

[0030] Reference Figure 1 A pole-mounted single-phase transformer includes a cylindrical body 1, with a low-voltage bushing 11 installed on the outer circumferential surface of the cylindrical body 1 and a high-voltage bushing 12 installed on the top; two support frames 13 are fixed on the outer circumferential surface of the cylindrical body 1 away from the low-voltage bushing 11; during the installation of the single-phase transformer, metal clamps are used to fix the support frames 13 to the utility pole, thereby realizing the installation and fixation of the single-phase transformer.

[0031] Reference Figure 2 and Figure 3 The top and bottom surfaces of the cylindrical body 1 are provided with protective components 2. The protective components 2 include connecting plates 21 that are rotatably mounted on the outer edges of the top and bottom surfaces of the cylindrical body 1. A protective plate 22 is vertically fixed at the side edge of the connecting plate 21 away from the cylindrical body 1. Extension plates 23 that are fixedly connected to the two sides of the connecting plate 21 are fixed at the two sides of the protective plate 22. When the equipment is installed and used, the two connecting plates 21 can be rotated to an installation state parallel to the axis of the cylindrical body 1 and fixed. At the same time, the protective plate 22 is rotated to a protective state parallel to the end face of the cylindrical body 1. In this way, the combined structure of the connecting plate 21, the extension plate 23 and the protective plate 22 is used to protect the top and bottom surfaces of the cylindrical body 1.

[0032] Reference Figure 3 and Figure 4 The connecting plate 21 is provided with a cleaning component 3, wherein the cleaning component 3 includes a scraper 31 rotatably mounted on the side of the connecting plate away from the protective plate 22, a drive component 32 fixed on the side of the connecting plate 21 facing the protective plate 22, the drive component 32 being a drive motor 321 fixed on the connecting plate 21 and a mobile power supply 322 embedded on the inner side of the protective plate 22. When a single-phase transformer is in normal use, the scraper 31 can be driven to rotate by the drive motor 321, and the rotating surface of the scraper 31 is parallel to the side of the connecting plate 21 away from the protective plate 22. In this way, the scraper 31 can be used to clear the plants attached to the outer side of the connecting plate 21, thereby reducing the impact of the attached plants on the performance of the single-phase transformer.

[0033] Reference Figure 3 and Figure 5 When the protective plate 22 is in the installation state, two movable wheels 24 are fixed on the side away from the cylindrical body 1, and the bottom and top surfaces of the cylindrical body 1 are provided with locking parts 4 for locking the protective plate 22 in the installation state. When the equipment moves a short distance, the two connecting plates 21 can rotate towards each other to a support state perpendicular to the axis of the cylindrical body 1 and are also fixed by the locking member 4. At this time, the two protective plates 22 rotate synchronously to a moving state parallel to the axis of the cylindrical body 1. At this time, the sides of the two protective plates 22 near the moving wheel 24 can be flipped to face the ground.

[0034] Reference Figure 4 , Figure 5 and Figure 6 The locking component 4 includes a support plate 41 fixed on the side of the connecting plate 21 facing the protective plate 22 and parallel to the protective plate 22. The drive motor 321 is located between the support plate 41 and the protective plate 22, and the side of the support plate 41 away from the protective plate 22 abuts against the end face of the cylindrical body 1 when the connecting plate 21 is in the installation state. A first locking groove 221 is provided on the inner side of the protective plate 22 facing the connecting plate 21, and a second locking groove 411 is provided on the side of the support plate 41 away from the protective plate 22. The locking component 4 also includes an elastic locking plate 42 that is rotatably connected to both ends of the cylindrical body 1 and has elastic elongation properties. The elastic locking plate 42 is a conventional telescopic structure with an internal spring, which will not be described in detail here. When the elastic locking plate 42 is in the second locking state, a traction handle 43 is fixed on the side away from the connecting plate 21. The elastic locking plate 42 can rotate in the direction close to the connecting plate 21 to the first locking state parallel to the end face of the cylindrical body 1, and in the direction away from the connecting plate 21 to the second locking state perpendicular to the end face of the cylindrical body 1. When the elastic locking plate 42 is in the first locking state and the connecting plate 21 is in the supporting state (that is, the equipment moving state), the end of the elastic locking plate 42 away from the cylindrical body 1 can be inserted into the second locking groove 411, thereby achieving the locking of the corresponding state of the protective plate 22. When the elastic locking plate 42 is in the second locking state and the connecting plate 21 is in the installation state (that is, the equipment is in normal use), the end of the elastic locking plate 42 away from the cylindrical body 1 can be inserted into the first locking groove 221, thereby locking the corresponding state of the protective plate 22. At this time, the elastic locking plate 42 can protect the driving component 32 and reduce the possibility of external impurities adhering to the outer surface of the driving component 32.

[0035] Reference Figure 6 and Figure 7 An elastic locking plate 42 is provided with an elastic snap-fit ​​member 44 on the outer periphery of the end away from the cylindrical body 1. The inner walls of the first locking groove 221 and the second locking groove 411 are both provided with positioning grooves 412 for the elastic snap-fit ​​member 44 to snap into. The outer edge of the end of the elastic locking plate 42 away from the cylindrical body 1 is provided with a first inclined surface 422, and the opening edges of the first locking groove 221 and the second locking groove 411 are both provided with second inclined surfaces 413. The elastic snap-fit ​​component 44 includes a compression spring 441 and an arc-shaped protrusion 442. The outer periphery of the elastic locking plate 42 is provided with a placement groove 421 for the compression spring 441 and the arc-shaped protrusion 442 to be placed. The compression spring 441 presses one side of the arc-shaped protrusion 442 so that a part of the arc-shaped protrusion 442 protrudes from the opening of the placement groove 421. The outer surface of the protruding part of the arc-shaped protrusion 442 is an arc surface, and the arc length corresponding to the arc surface is a minor arc. When the elastic locking plate 42 needs to be inserted into the first locking groove 221 and the second locking groove 411, the combination of the first inclined surface 422 and the second inclined surface 413 can be used to achieve faster insertion. Then the elastic snap-fit ​​member 44 can be snapped into the corresponding positioning groove 412, thereby improving the corresponding installation stability.

[0036] The implementation principle of this application embodiment is as follows: For short-distance movement, firstly, the elastic locking plate 42 is unlocked by operating the traction handle 43, and the two connecting plates 21 rotate towards each other to a support state perpendicular to the main body axis. The protective plate 22 simultaneously rotates to a movement state parallel to the main body axis, and then the elastic locking plate 42 rotates to a first locking state parallel to the end face of the main body and inserts into the second locking groove 411 of the support plate 41; then the entire device is flipped over, so that the side with the moving wheels 24 faces the ground, and the device can be moved short distances by means of the moving wheels 24.

[0037] In the installation state, the two connecting plates 21 rotate in opposite directions until they are parallel to the axis of the cylindrical body 1 and then fixed. Simultaneously, the protective plate 22 rotates to a protective state parallel to the end face of the cylindrical body 1. The connecting plates 21, extension plates 23, and protective plate 22 form a combined protective structure, protecting the top and bottom surfaces of the main body. At this time, the elastic locking plate 42 is inserted into the first locking groove 221; the elastic locking plate 42 also protects the driving component 32 between the support plate 41 and the protective plate 22, reducing the adhesion of external impurities. Finally, the support frame 13 is fixed to the utility pole using metal clamps, completing the equipment installation.

[0038] During normal use, the cleaning component 3 is activated, and the mobile power supply 322 inside the protective plate 22 supplies power to the drive motor 321. The drive motor 321 drives the scraper 31 to rotate. The rotating surface of the scraper 31 is parallel to the outer side of the connecting plate 21, which can efficiently clean the plants attached to the outer side of the connecting plate 21 and reduce the impact of plants on the performance of the transformer.

[0039] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. A pole-mounted single-phase transformer, comprising a cylindrical body (1), wherein a low-voltage bushing (11) is mounted on the outer circumferential surface of the cylindrical body (1) and a high-voltage bushing (12) is mounted on the top; a plurality of support frames (13) are fixedly provided on the outer circumferential surface of the cylindrical body (1) away from the low-voltage bushing (11), characterized in that, A connecting plate (21) is rotatably installed on the outer edges of the top and bottom surfaces of the cylindrical body (1), and a protective plate (22) is vertically fixed on the side edge of the connecting plate (21) away from the cylindrical body (1). When the equipment is installed and used, the two connecting plates (21) can rotate to a state parallel to the axis of the cylindrical body (1) and be fixed. At the same time, the protective plate (22) rotates to a protective state parallel to the end face of the cylindrical body (1). A scraper (31) is rotatably installed on the side of the connecting plate (21) away from the protective plate (22), and a driving member (32) for driving the scraper (31) to rotate is fixed on the side facing the protective plate (22). The rotating surface of the scraper (31) is parallel to the side of the connecting plate (21) away from the protective plate (22).

2. A pole-mounted single-phase transformer according to claim 1, characterized in that, The protective plate (22) is fixedly provided with extension plates (23) on both sides of the connecting plate (21).

3. A pole-mounted single-phase transformer according to claim 1, characterized in that, When the protective plate (22) is in the installation state, several moving wheels (24) are fixed on the side away from the cylindrical body (1); when the equipment moves a short distance, the two connecting plates (21) can rotate to a support state perpendicular to the axis of the cylindrical body (1) and be fixed. At this time, the two protective plates (22) rotate synchronously to a moving state parallel to the axis of the cylindrical body (1). At this time, the sides of the two protective plates (22) close to the moving wheels (24) can be flipped to face the ground.

4. A pole-mounted single-phase transformer according to claim 3, characterized in that, The connecting plate (21) has a support plate (41) parallel to the protective plate (22) fixed on its side facing the protective plate (22). The driving member (32) is located between the support plate (41) and the protective plate (22). The side of the support plate (41) away from the protective plate (22) abuts against the end face of the cylindrical body (1) when the connecting plate (21) is in the installation state.

5. A pole-mounted single-phase transformer according to claim 4, characterized in that, Both ends of the cylindrical body (1) are rotatably connected to an elastic locking plate (42) with elastic elongation properties. The elastic locking plate (42) can rotate in the direction close to the connecting plate (21) to a first locking state parallel to the end face of the cylindrical body (1), and in the direction away from the connecting plate (21) to a second locking state perpendicular to the end face of the cylindrical body (1). The protective plate (22) has a first locking groove (221) on its inner side facing the connecting plate (21), and the support plate (41) has a second locking groove (411) on its side away from the protective plate (22). When the elastic locking plate (42) is in the first locking state, the end away from the cylindrical body (1) can be inserted into the second locking groove (411) when the connecting plate (21) is in the supporting state. When the elastic locking plate (42) is in the second locking state, the end away from the cylindrical body (1) can be inserted into the first locking groove (221) when the connecting plate (21) is in the installation state.

6. A pole-mounted single-phase transformer according to claim 5, characterized in that, When the elastic locking plate (42) is in the second locking state, a traction handle (43) is fixed on the side away from the connecting plate (21).

7. A pole-mounted single-phase transformer according to claim 5, characterized in that, The elastic locking plate (42) has a first inclined surface (422) at the outer edge of the end away from the cylindrical body (1).

8. A pole-mounted single-phase transformer according to claim 5, characterized in that, The first locking groove (221) and the second locking groove (411) are both provided with a second inclined surface (413) at the opening edge.

9. A pole-mounted single-phase transformer according to claim 5, characterized in that, The elastic locking plate (42) is provided with an elastic snap-fit ​​member (44) on the outer periphery of the end away from the cylindrical body (1), and the inner walls of the first locking groove (221) and the second locking groove (411) are provided with positioning grooves (412) for the elastic snap-fit ​​member (44) to be snapped into.

10. A pole-mounted single-phase transformer according to claim 9, characterized in that, The elastic snap-fit ​​component (44) includes a compression spring (441) and an arc-shaped protrusion (442). The outer periphery of the elastic locking plate (42) is provided with a placement groove (421) for the compression spring (441) and the arc-shaped protrusion (442) to be placed. The compression spring (441) squeezes one side of the arc-shaped protrusion (442) so that a part of the arc-shaped protrusion (442) protrudes from the opening of the placement groove (421). The outer surface of the protruding part of the arc-shaped protrusion (442) is an arc surface, and the arc length corresponding to the arc surface is a minor arc.

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