An outlet device for a self-coupled power transformer

Abstract

The present application relates to the technical field of transformer, and particularly relates to a wire outlet device for autotransformer, which comprises a transformer body, an outer sleeve, a conductive rod and a sleeve type umbrella skirt insulator, the conductive rod is connected with the wire outlet of the internal coil of the transformer body, the outer sleeve is fixedly connected outside the transformer body, the outer part of the conductive rod movably sleeves a base flange, a butt joint assembly for locking is arranged below the outer part of the sleeve type umbrella skirt insulator, a screw-in locking assembly for connecting the sleeve type umbrella skirt insulator is arranged outside the butt flange, through the screw thread transmission of the screw-in ring plate and the threaded sleeve, the plug-in limiting of the limiting long rod and the circular slot is matched, the insulator is kept from rotating in the whole feeding process, the defect that the insulator rotates synchronously with the screw thread in the existing direct screw thread connection mode is avoided, and the coaxiality of the installation of the insulator and the conductive rod is ensured.

Description

Technical Field

[0001] This invention relates to the technical field of transformers, and in particular to a line-out device for an autotransformer. Background Technology

[0002] In the field of manufacturing transformers and inductors such as intelligent large transformers, DC converter transformers, and intelligent reactors, the outgoing line device of autotransformers is the core component for power transmission on the high-voltage side of the transformer. Among them, the shed insulators sleeved on the outside of the conductive rod are the core components for ensuring insulation protection and structural support of the outgoing line. Their installation alignment accuracy and assembly stability directly determine the overall operational safety and insulation reliability of the transformer.

[0003] Currently, for the on-site installation of this type of sleeve-type shed insulator, the industry generally adopts a direct threaded connection assembly method: a threaded structure is set at the mating end of the insulator, which is directly screwed into the threaded adapter at the end of the transformer outer sleeve. The circumferential rotation of the insulator is converted into axial feed motion by manually rotating the insulator body, thereby completing the mating installation and locking of the insulator. However, in the actual on-site assembly process, this direct threaded connection installation method has significant technical defects: this assembly method requires the entire insulator to rotate circumferentially, and the insulator rotation feed process... During the process, continuous circumferential rotation can easily cause deviations in the coaxiality between the insulator and the internal conductive rods, thus increasing the difficulty of on-site alignment and assembly. At the same time, it is impossible to guarantee the alignment accuracy between the insulator and the surrounding supporting limiting and protective components during on-site installation, which can easily lead to misalignment and incompatibility of supporting components, resulting in extremely poor installation consistency. This is not conducive to the standardized mass assembly of transformers. Therefore, it is urgent to develop an autotransformer output device that can achieve automatic axial feeding installation of the insulator in a circumferentially fixed state, ensure installation coaxiality and accuracy, and simplify the installation process, so as to solve many problems existing in the current technology. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a line-out device for an autotransformer.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a lead-out device for an autotransformer, comprising a transformer body, an outer sleeve, a conductive rod, and a sleeve-type shed insulator. The conductive rod is connected to the lead-out coil inside the transformer body. The outer sleeve is fixedly connected to the outside of the transformer body and is sleeved around the conductive rod. A base flange is movably fitted around the outside of the conductive rod. The base flange is fixedly connected to the outside of the transformer body. A mating flange is bolted to the outside of the base flange. A sealing ring is provided between the mating surfaces of the base flange and the mating flange. A locking assembly is provided below the outside of the sleeve-type shed insulator. The mating assembly includes an inner pad plate. The inner pad is fixedly connected to the cavity below the shed of the sleeve-type shed insulator. It is used to form an elastic buffer at the connection between the sleeve-type shed insulator and the mating flange to reduce the rigid contact stress between the two and prevent the root of the shed of the sleeve-type shed insulator from being squeezed and damaged due to rigid connection. The inner wall of the inner pad is fixedly connected to a threaded sleeve. The sleeve-type shed insulator, the inner pad, and the threaded sleeve are all provided with through holes for placing conductive rods. An elastic silicone pad is fixedly connected to the end of the inner pad away from the inside of the shed of the sleeve-type shed insulator. The elastic silicone pad is made of silicone rubber that is resistant to transformer oil and has stable elastic buffering performance. The threaded sleeve is located inside the inner pad and the elastic silicone pad.

[0006] As a preferred embodiment of the present invention, a screw-in locking assembly for connecting a sleeve-type shed insulator is provided on the outside of the mating flange. The screw-in locking assembly includes a protective base, which is fixedly connected to the end of the outer sleeve away from the transformer body. The protective base is movably sleeved on the outside of the conductive rod. An outer ring groove is opened on the outside of the protective base, and a rotating collar is movably connected inside the outer ring groove. A screw-in ring plate is fixedly connected above the outer side of the rotating collar. The inner ring of the screw-in ring plate is a threaded groove that is adapted to the thread of the threaded sleeve. By connecting the threaded sleeve... The lower end of the sleeve is inserted into the threaded groove of the screw-in ring plate. Rotating the rotating collar drives the screw-in ring plate to rotate synchronously. The rotation of the screw-in ring plate drives the threaded sleeve to rotate, and synchronously drives the threaded sleeve and the inner pad plate to move downward. A limiting support for placing the elastic silicone pad is fixedly connected to the outside of the rotating collar. The limiting support is located below the elastic silicone pad. When the sleeve-type shed insulator moves downward, it synchronously drives the elastic silicone pad so that its lower end fits against the outside of the limiting support. During the continuous contraction of the elastic silicone pad, it also helps the sleeve-type shed insulator to descend. For buffering, two positioning side platforms are fixedly connected to the outside of the rotating collar. These two positioning side platforms are arranged in a ring-like, equally spaced configuration outside the rotating collar. Each positioning side platform is convex in shape, and a round shaft is fixedly fitted inside each platform. A rotating handle is rotatably connected to the outside of the round shaft. The rotating handle rotates outside the positioning side platform via the round shaft. A limiting side is provided on the side of the positioning side platform facing the clockwise rotation direction of the rotating collar. This limiting side acts as a stop to limit the rotation angle of the rotating handle, ensuring a stable rigidity between the rotating handle and the rotating collar when the rotating handle drives the rotating collar to rotate clockwise. To prevent the rotating handle from flipping backward and failing, a storage base is provided on the outside of each positioning side platform. The storage base is fixedly connected to the outside of the rotating collar. The rotating handle rotates inward around the circular shaft. After the rotating handle rotates into the inside of the storage base, friction will lock the rotating handle onto the outside of the rotating collar. Four rotating assist rods are fixedly connected to the outside of the rotating collar. The four rotating assist rods are arranged in pairs, and the two pairs of rotating assist rods are arranged in a ring symmetrically outside the rotating collar. The rotating assist rods are used to assist the rotating collar in rotating outside the protective base.

[0007] As a preferred technical solution of the present invention, a track ring groove is provided on the upper surface of the docking flange, and a guide and fixing component for assisting the rotating collar to stop is provided on the outside of the rotating collar. The guide and fixing assembly includes an outer mounting plate and a vertical screw. The outer mounting plate is fixedly connected to the outside of the rotating collar, and the vertical screw is fixedly connected to the outside of the outer mounting plate on the side away from the rotating collar. The lower end of the vertical screw is movably connected to the inside of the track ring groove. The lower end face of the vertical screw maintains a clearance with the inner bottom wall of the track ring groove to avoid friction and wear during sliding. A pressure nut is threadedly connected to the outside of the vertical screw near the outer mounting plate. By rotating the pressure nut, it moves downward outside the vertical screw until it fits against the surface of the mating flange. After the pressure nut is rotated and pressed against the surface of the mating flange, the rotational position of the rotating collar can be fixed.

[0008] As a preferred technical solution of the present invention, the outer side of the inner padding plate is provided with a plurality of circumferential limiting components; Each circumferential limiting component includes a positioning base and a horizontal connecting plate. The positioning base is fixedly connected to the outer side of the base flange. A circular slot is opened on the side of the positioning base away from the transformer body. The horizontal connecting plate is fixedly connected to the outer side of the inner pad plate. A vertical bushing is fixedly connected to the lower end of the horizontal connecting plate. A limiting rod is movably connected inside the vertical bushing. By placing the lower end of the limiting rod inside the circular slot, the circumferential position of the sleeve-type shed insulator can be limited, preventing the sleeve-type shed insulator from rotating as a whole.

[0009] As a preferred embodiment of the present invention, the vertical sleeve has an inner vertical groove, and a guide ring is movably connected inside the inner vertical groove. The guide ring is fixedly sleeved on the outside of the limiting rod. The limiting rod moves stably upward or downward inside the vertical sleeve through the guide ring. The longitudinal displacement distance of the limiting rod is limited by the cooperation between the inner vertical groove and the guide ring. The positioning base has a nesting groove at one end near the limiting rod. The vertical sleeve is fixedly connected to a locking ring that matches the shape inside the nesting groove at one end near the positioning base. The locking ring is T-shaped. The vertical sleeve moves downward to move the locking ring and insert it into the inside of the nesting groove. The locking ring and the nesting groove are interference fit.

[0010] Compared with the prior art, the beneficial effects that this invention can achieve are: 1. By setting up a docking component in conjunction with a screw-in locking component, the sliding cooperation between the vertical sleeve and the limiting rod provides stable guidance for the feed. Combined with the locking ring and the nested slot, precise axial positioning is achieved, effectively controlling the installation stroke and improving installation accuracy and consistency. Through the threaded transmission cooperation between the screw-in ring plate and the threaded sleeve, the rotatable screw-in ring plate drives the threaded sleeve to automatically feed the sleeve-type umbrella skirt insulator axially for installation. With the insertion and limiting of the limiting rod and the circular slot, the insulator remains circumferentially fixed and does not rotate throughout the feed, avoiding the defect of the insulator rotating synchronously with the thread in the existing direct threaded connection method, and ensuring the coaxiality of the installation of the insulator and the conductive rod.

[0011] 2. By interlocking the limiting rod with the circular slot, the overall circumferential orientation of the sleeve-type shed insulator can be fixed when it is installed outside the conductive rod, effectively preventing circumferential rotation of the insulator and ensuring the coaxiality and stability of the subsequent threaded feed transmission. By sliding the vertical sleeve with the limiting rod, stable guidance can be provided during the axial downward movement of the sleeve-type shed insulator, making the insulator feed movement smooth and without sway, while also achieving smooth storage of the limiting rod. By interlocking the locking ring with the nested slot, precise axial positioning and installation can be completed after the sleeve-type shed insulator is fed into place, effectively controlling the installation stroke of the insulator and greatly improving the accuracy and consistency of the insulator docking installation.

[0012] 3. After the rotating collar is rotated to the preset locking position and the sleeve-type shed insulator is locked, the pressure nut is turned with a wrench to make it spiral downward along the vertical screw. The pressure nut continues to feed until its lower end face is tightly abutting the surface of the mating flange. Through the static friction between the pressure nut and the mating flange, the rotating collar is circumferentially stopped and locked, restricting its circumferential rotational freedom. This effectively prevents the rotating collar from rotating and loosening after the sleeve-type shed insulator is locked, further ensuring the long-term stability of the sleeve-type shed insulator installation and fixing.

[0013] 4. The combination of the elastic silicone pad and the limiting support forms a continuous elastic buffer, avoiding damage to the insulator skirt from rigid impacts. Finally, the threaded sleeve can be tightened again with the help of the rotating booster rod, ensuring the long-term stability and reliability of the insulator installation and locking, while greatly simplifying the installation process and improving on-site installation efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main body of the transformer of the present invention; Figure 2 This is a schematic diagram of the conductive rod of the present invention; Figure 3 This is a schematic diagram of the structure of the limiting rod and the circular groove of the present invention. Figure 4 This is a schematic diagram of the structure of the sleeve-type umbrella insulator of the present invention; Figure 5 This is a partial cross-sectional view of the inner padding platform of the present invention; Figure 6 This is a schematic diagram of the structure of the mating flange of the present invention; Figure 7 This is a schematic diagram of the rotating collar of the present invention; Figure 8 This is a schematic diagram of the positioning side platform of the present invention; Figure 9This is a partial cross-sectional view of the rotating collar of the present invention; Figure 10 This is a cross-sectional view of the vertical sleeve of the present invention.

[0015] The components are as follows: 10. Transformer body; 11. Outer sleeve; 12. Conductive rod; 13. Base flange; 14. Butt flange; 15. Sleeve-type shed insulator; 16. Track ring groove; 20. Protective base; 21. Outer ring groove; 22. Rotating collar; 23. Screw-in ring plate; 24. Positioning side platform; 25. Rotating handle; 26. Storage seat; 27. Round shaft; 28. Rotation assist rod; 29. ​​Limiting support seat; 30. Inner pad plate; 31. Threaded sleeve; 32. Elastic silicone pad; 40. Outer hanging plate; 41. Vertical screw; 42. Compression nut; 50. Positioning base; 51. Nested groove; 52. Round groove; 53. Horizontal connecting plate; 54. Vertical sleeve; 55. Inner vertical groove; 56. Guide ring sleeve; 57. Insertion ring; 58. Limiting rod. Detailed Implementation

[0016] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0017] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a lead-out device for an autotransformer includes a transformer body 10, an outer sleeve 11, a conductive rod 12, and a sleeve-type shed insulator 15. The conductive rod 12 is connected to the lead-out coil inside the transformer body 10. The outer sleeve 11 is fixedly connected to the outside of the transformer body 10 and is fitted over the conductive rod 12. A base flange 13 is movably fitted over the conductive rod 12 and is fixedly connected to the outside of the transformer body 10. A mating flange 14 is bolted to the outside of the base flange 13. A sealing ring is provided between the mating surfaces of the base flange 13 and the mating flange 14. A locking assembly is provided below the outside of the sleeve-type shed insulator 15. The mating assembly includes an inner pad 30, which is fixedly connected to the outer sleeve shed insulator 15. Inside the cavity below the shed of the sleeve-type insulator 15, an inner pad plate 30 is used to form an elastic buffer at the connection between the sleeve-type insulator 15 and the mating flange 14, so as to weaken the rigid contact stress between the two and prevent the root of the shed of the sleeve-type insulator 15 from being squeezed and damaged due to rigid connection. A threaded sleeve 31 is fixedly connected to the inner wall of the inner pad plate 30. The sleeve-type insulator 15, the inner pad plate 30 and the threaded sleeve 31 are all provided with through holes for placing the conductive rod 12. An elastic silicone pad 32 is fixedly connected to one end of the inner pad plate 30 away from the inside of the shed of the sleeve-type insulator 15. The elastic silicone pad 32 is made of silicone rubber material that is resistant to transformer oil and has stable elastic buffering performance. The threaded sleeve 31 is located inside the inner pad plate 30 and the elastic silicone pad 32.

[0018] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, the outside of the mating flange 14 is provided with a screw-in locking assembly for connecting the sleeve-type shed insulator 15. The screw-in locking assembly includes a protective base 20, which is fixedly connected to the outside of the outer sleeve 11 at the end away from the transformer body 10, and the protective base 20 is movably sleeved on the outside of the conductive rod 12. The outer side of the protective base 20 has an outer ring groove 21, and a rotating collar 22 is movably connected inside the outer ring groove 21. A screw-in ring plate 23 is fixedly connected above the outside of the rotating collar 22. The inner ring of the screw-in ring plate 23 is provided with a threaded groove that is adapted to the thread of the threaded sleeve 31. By placing the lower end of the threaded sleeve 31 into the screw-in ring plate 23... Within the threaded slot, the rotating collar 22 drives the screw-in ring plate 23 to rotate synchronously. The rotation of the screw-in ring plate 23 drives the threaded sleeve 31, and synchronously drives the threaded sleeve 31 and the inner pad plate 30 to move downwards. A limiting support 29 for placing the elastic silicone pad 32 is fixedly connected to the outside of the rotating collar 22. The limiting support 29 is located below the elastic silicone pad 32. When the sleeve-type shed insulator 15 moves downwards, it synchronously drives the elastic silicone pad 32 so that its lower end fits against the outside of the limiting support 29. During the continuous contraction of the elastic silicone pad 32, it buffers the descent of the sleeve-type shed insulator 15. The external fixed connection has two positioning side platforms 24, which are arranged in a ring-shaped equal interval outside the rotating collar 22. The positioning side platforms 24 are convex in shape, and a round shaft 27 is fixedly fitted inside the positioning side platform 24. A rotating handle 25 is rotatably connected to the outside of the round shaft 27. The rotating handle 25 rotates outside the positioning side platform 24 through the round shaft 27. A limiting long side is set on the side of the positioning side platform 24 facing the clockwise rotation direction of the rotating collar 22. The limiting long side forms a stop limit on the rotation angle of the rotating handle 25, so that when the rotating handle 25 drives the rotating collar 22 to rotate clockwise, it forms a stable rigid force support point with the rotating collar 22, preventing rotation. The handle 25 fails to flip in the reverse direction. Each positioning side platform 24 is provided with a storage seat 26 on its outside. The storage seat 26 is fixedly connected to the outside of the rotating collar 22. The rotating handle 25 rotates into the storage seat 26 with the circular shaft 27 as the axis. After the rotating handle 25 rotates into the inside of the storage seat 26, the friction force will lock the rotating handle 25 to the outside of the rotating collar 22. Four rotating assist rods 28 are fixedly connected to the outside of the rotating collar 22. The four rotating assist rods 28 are arranged in pairs. The two sets of rotating assist rods 28 are arranged in a ring symmetrically on the outside of the rotating collar 22. The rotating assist rods 28 are used to assist the rotating collar 22 in rotating outside the protective base 20.

[0019] The sleeve-type shed insulator 15, along with its lower fixed threaded sleeve 31, is placed above the screw-in ring plate 23, with the lower end of the threaded sleeve 31 inserted into the threaded groove of the inner ring of the screw-in ring plate 23. Simultaneously, the sleeve-type shed insulator 15 is fitted over the conductor rod 12. At this point, the rotating handle 25 is flipped outwards around the circular shaft 27, disengaging from the receiving seat 26. Holding the rotating handle 25 drives the rotating collar 22 to rotate outside the protective base 20. The outer ring groove 21 on the protective base 20 provides radial and axial limits to the rotating collar 22, allowing it to rotate only circumferentially around its axis. The rotation of the rotating collar 22 synchronously drives the screw-in ring plate 23 to rotate, driving the threaded sleeve 31 to rotate through the threaded engagement. This converts the circumferential rotational motion of the threaded sleeve 31 into an axial downward linear feed motion. As the threaded sleeve 31 continues to feed downwards, it simultaneously drives the elastic silicone pad 32 to move down and fit against the upper surface of the limiting support 29. As the feeding stroke continues, the elastic silicone pad 32 slowly contracts elastically under the support of the limiting support 29, providing continuous elastic buffering for the installation process of the sleeve-type shed insulator 15, and avoiding rigid impacts directly acting on the shed part of the sleeve-type shed insulator 15. After the threaded sleeve 31 continues to move down and fits against the end face of the outer tube 11, it can be fitted onto the outside of the rotating assist rod 28 with the help of an external tool, driving the rotating collar 22 and the screw-in ring plate 23 to rotate further, and performing a secondary tightening of the threaded sleeve 31, thereby stably fixing the sleeve-type shed insulator 15 to the outside of the outer tube 11, realizing the rapid installation and locking of the sleeve-type shed insulator 15.

[0020] like Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, a track ring groove 16 is provided on the upper surface of the docking flange 14. A guide and fixing assembly for assisting the rotating collar 22 in stopping is provided on the outside of the rotating collar 22. The guide and fixing assembly includes an outer mounting plate 40 and a vertical screw 41. The outer mounting plate 40 is fixedly connected to the outside of the rotating collar 22, and the vertical screw 41 is fixedly connected to the outside of the outer mounting plate 40 on the side away from the rotating collar 22. The lower end of the vertical screw 41 is movably connected to the inside of the track ring groove 16. The lower end face of the vertical screw 41 and the inner bottom wall of the track ring groove 16 maintain a clearance to avoid friction and wear during sliding. A pressure nut 42 is threadedly connected to the side of the vertical screw 41 near the outer mounting plate 40. By rotating the pressure nut 42, it moves downward outside the vertical screw 41. The pressure nut 42 moves downward until it fits against the surface of the docking flange 14. After the pressure nut 42 is rotated and pressed against the surface of the docking flange 14, the rotation position of the rotating collar 22 can be fixed.

[0021] After the rotating collar 22 has rotated into place and the sleeve-type umbrella insulator 15 has been locked and fixed, the wrench drives the pressure nut 42 to make a downward spiral feed along the vertical screw 41. The pressure nut 42 continues to feed until its lower end face is tightly abutted against the surface of the mating flange 14. Through the abutting friction between the pressure nut 42 and the mating flange 14, the rotating collar 22 is circumferentially stopped and locked, restricting its circumferential rotational freedom. This effectively prevents the rotating collar 22 from rotating and loosening after the sleeve-type umbrella insulator 15 is locked, further ensuring the stability of the installation and fixing of the sleeve-type umbrella insulator 15.

[0022] like Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 and Figure 10 As shown, the inner pad plate 30 is provided with three circumferential limiting components on its exterior. Each circumferential limiting component includes a positioning base 50 and a horizontal connecting plate 53. The positioning base 50 is fixedly connected to the outer side of the base flange 13. A circular slot 52 is opened on the side of the positioning base 50 away from the transformer body 10. The horizontal connecting plate 53 is fixedly connected to the outer side of the inner pad plate 30. A vertical sleeve 54 is fixedly connected to the lower end of the horizontal connecting plate 53. A limiting rod 58 is movably connected inside the vertical sleeve 54. By placing the lower end of the limiting rod 58 inside the circular slot 52, the circumferential position of the sleeve-type shed insulator 15 can be limited to prevent the sleeve-type shed insulator 15 from rotating as a whole. An inner vertical slot 53 is opened inside the vertical sleeve 54. 5. A guide ring 56 is movably connected inside the inner vertical slot 55. The guide ring 56 is fixedly sleeved on the outside of the limiting rod 58. The limiting rod 58 moves stably upward or downward inside the vertical sleeve 54 through the guide ring 56. The longitudinal displacement distance of the limiting rod 58 is limited by the cooperation between the inner vertical slot 55 and the guide ring 56. A nesting slot 51 is opened at one end of the positioning base 50 near the limiting rod 58. A locking ring 57 that matches the internal shape of the nesting slot 51 is fixedly connected at one end of the vertical sleeve 54 near the positioning base 50. The locking ring 57 is T-shaped. The vertical sleeve 54 drives the locking ring 57 to move downward and insert it into the interior of the nesting slot 51. The locking ring 57 and the nesting slot 51 are interference fit.

[0023] During the installation of the sleeve-type shed insulator 15 onto the outside of the conductive rod 12, hold the sleeve-type shed insulator 15 and simultaneously move the vertical sleeve 54 and the limiting rod 58. Align the limiting rod 58 directly above the circular slot 52 and lower it, allowing the limiting rod 58 to engage inside the circular slot 52. Insert the three limiting rods 58 into the three corresponding circular slots 52 to complete the overall circumferential positioning of the sleeve-type shed insulator 15, preventing circumferential rotation of the sleeve-type shed insulator 15 outside the conductive rod 12. At this time, the rotation of the rotating collar 22 and the rotating ring plate 23 drives the sleeve-type shed insulator 15 to move axially downward. During the downward movement of the sleeve-type shed insulator 15, the horizontal connecting plate 53 is driven simultaneously, causing the vertical sleeve 54 to slide down along the outer wall of the limiting rod 58, and the limiting rod 58 is housed inside the vertical sleeve 54. The vertical sleeve 54 continues to slide down along the limiting rod 58, and the locking ring 57 is driven to insert into the nesting slot 51, thereby completing the axial positioning and installation of the entire sleeve-type shed insulator 15.

[0024] Working principle: In use: Step 1: Sleeve the entire sleeve-type shed insulator 15 over the conductor rod 12. Hold the insulator and simultaneously drive the vertical sleeve 54 and the limiting rod 58. After the limiting rod 58 is aligned with the top of the circular slot 52, lower it and insert it into the slot. Insert the three sets of limiting rods 58 into the three circular slots 52 respectively to fix the circumferential orientation of the insulator and prevent it from rotating circumferentially. At the same time, align the threaded sleeve 31 at the lower end of the insulator and place it into the threaded slot of the inner ring of the screw-in ring plate 23 to complete the pre-connection before feeding.

[0025] Step 2: Rotate the handle 25 outward around the axis 27, disengaging it from the storage base 26. Hold the handle 25 to drive the rotating collar 22 to rotate. The outer ring groove 21 on the protective base 20 limits the rotating collar 22, allowing it to rotate only in the circumferential direction. The rotating collar 22 simultaneously drives the screw-in ring plate 23 to rotate, and through the threaded engagement, drives the threaded sleeve 31 to convert the circumferential rotation into axial downward linear feed, causing the insulator to move continuously downward. During the feed, the insulator drives the vertical sleeve 54 to slide steadily down along the outer wall of the limiting rod 58 through the horizontal connecting plate 53, storing the limiting rod 58 inside the tube. At the same time, it drives the elastic silicone pad 32 to move down to fit against the upper surface of the limiting support 29. The elastic pad continuously contracts with the feed stroke, providing a buffer for the insulator installation and avoiding rigid impact damage to the skirt.

[0026] Step 3: When the insulator is continuously fed to the preset position, the vertical sleeve 54 drives the locking ring 57 to insert into the nesting slot 51, completing the axial positioning and installation of the insulator as a whole; after the threaded sleeve 31 moves down to fit against the end face of the outer sleeve 11, it is fitted onto the outside of the rotating assist rod 28 with the help of an external tool, driving the rotating collar 22 and the screw-in ring plate 23 to rotate further, performing a secondary tightening of the threaded sleeve 31, and fixing the entire sleeve-type umbrella skirt insulator 15 stably to the outside of the outer sleeve 11, completing the rapid installation and locking of the insulator.

[0027] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A lead-out device for an autotransformer, comprising a transformer body (10), an outer sleeve (11), a conductive rod (12), and a sleeve-type shed insulator (15), wherein the conductive rod (12) is connected to the lead-out coil inside the transformer body (10), the outer sleeve (11) is fixedly connected to the outside of the transformer body (10), and the outer sleeve (11) is sleeved on the outside of the conductive rod (12), characterized in that, The conductive rod (12) is movably fitted with a base flange (13), which is fixedly connected to the outside of the transformer body (10). The base flange (13) is fixedly connected to a docking flange (14) by bolts. A docking assembly for locking is provided below the outside of the sleeve-type shed insulator (15). The docking assembly includes an inner pad plate (30), which is fixedly connected to the cavity below the umbrella skirt of the sleeve-type umbrella skirt insulator (15), and a threaded sleeve (31) is fixedly connected to the inner wall of the inner pad plate (30). The outside of the docking flange (14) is provided with a screw-in locking assembly for connecting the sleeve-type shed insulator (15). The screw-in locking assembly includes a protective base (20). The protective base (20) is fixedly connected to the outside of the outer sleeve (11) at the end away from the transformer body (10). The protective base (20) is movably sleeved on the outside of the conductive rod (12). An outer ring groove (21) is opened on the outside of the protective base (20). A rotating collar (22) is movably connected inside the outer ring groove (21). A screw-in ring plate (23) is fixedly connected above the outside of the rotating collar (22).

2. The outgoing line device for an autotransformer according to claim 1, characterized in that, The inner pad plate (30) is fixedly connected to an elastic silicone pad (32) at one end of the inner side of the sleeve-type umbrella skirt insulator (15) away from the sleeve-type umbrella skirt insulator. The rotating collar (22) is externally fixedly connected to a limiting support (29) for placing the elastic silicone pad (32).

3. The outgoing line device for an autotransformer according to claim 1, characterized in that, The rotating collar (22) is fixedly connected to two positioning side platforms (24). The two positioning side platforms (24) are arranged in a ring shape and equally spaced outside the rotating collar (22). A round shaft (27) is fixedly sleeved inside the positioning side platform (24). A rotating handle (25) is rotatably connected to the outside of the round shaft (27). The rotating handle (25) rotates outside the positioning side platform (24) through the round shaft (27). Each positioning side platform (24) is provided with a storage seat (26) on its exterior, and the storage seat (26) is fixedly connected to the exterior of the rotating collar (22).

4. The outgoing line device for an autotransformer according to claim 3, characterized in that, The rotating collar (22) is fixedly connected to four rotating assist rods (28). The four rotating assist rods (28) are arranged in pairs, and the two sets of rotating assist rods (28) are arranged in a ring symmetrically outside the rotating collar (22). The rotating assist rods (28) are used to assist the rotating collar (22) in rotating outside the protective base (20).

5. The outgoing line device for an autotransformer according to claim 1, characterized in that, The upper surface of the docking flange (14) is provided with a track ring groove (16), and the outside of the rotating collar (22) is provided with a guide and fixing component to assist the rotating collar (22) in stopping. The guide fixing assembly includes an outer mounting plate (40) and a vertical screw (41). The outer mounting plate (40) is fixedly connected to the outside of the rotating collar (22), and the vertical screw (41) is fixedly connected to the outside of the outer mounting plate (40) away from the rotating collar (22). The lower end of the vertical screw (41) is movably connected to the inside of the track ring groove (16), and a pressure nut (42) is threadedly connected to the outside of the vertical screw (41) near the outer mounting plate (40).

6. The outgoing line device for an autotransformer according to claim 1, characterized in that, The inner pad platform (30) is provided with several circumferential limiting components on its exterior; Each circumferential limiting component includes a positioning base (50) and a horizontal connecting plate (53). The positioning base (50) is fixedly connected to the outer side of the base flange (13). A circular slot (52) is opened on the side of the positioning base (50) away from the transformer body (10). The horizontal connecting plate (53) is fixedly connected to the outer side of the inner pad plate (30). A vertical sleeve (54) is fixedly connected to the lower end of the horizontal connecting plate (53). A limiting rod (58) is movably connected inside the vertical sleeve (54).

7. A line-out device for an autotransformer according to claim 6, characterized in that, The vertical sleeve (54) has an inner vertical groove (55) inside, and a guide ring (56) is movably connected inside the inner vertical groove (55). The guide ring (56) is fixedly sleeved on the outside of the limiting rod (58).

8. A line-out device for an autotransformer according to claim 7, characterized in that, The positioning base (50) has a nested slot (51) at one end near the limiting rod (58), and the vertical sleeve (54) is fixedly connected to a locking ring (57) that matches the internal shape of the nested slot (51) at one end near the positioning base (50).

Images