Distribution transformer for power grid

Abstract

The invention relates to the field of transformers, in particular to a distribution transformer for a power grid, which comprises a transformer body and a device seat fixedly mounted at the lower end of the transformer body, a turnover shaft is inserted in the end part of the device seat in a penetrating manner, a frame seat is rotatably mounted on the outer surface of the turnover shaft, and a fixing frame is inserted in the upper end part of the frame seat in a penetrating manner; a fixing sleeve is slidably mounted on the outer surface of the fixing frame, a connecting frame extends from the front end of the fixing sleeve, arc-shaped clamping seats are fixedly mounted at the end of the connecting frame and the end of the fixing frame, the two arc-shaped clamping seats are symmetrically arranged, and angle clamping seats extend from the front ends and the rear ends of the arc-shaped clamping seats. And a fixing column is elastically mounted at the rear end of the fixing sleeve in a penetrating manner. According to the device, the installation efficiency is improved, use is convenient, meanwhile, the device can flexibly adapt to installation of a square electric pole or a round electric pole, the use requirement is met, and it is ensured that the transformer cannot fall off after being installed.

Description

Technical Field

[0001] The present invention relates to the field of transformers, and particularly to a distribution transformer for power grids. Background Art

[0002] Intelligent transformers are key devices in power grids and are widely used in various links such as power transmission and distribution. An intelligent line voltage regulating transformer is a device used to automatically regulate the voltage in a power line. It is equipped with an intelligent controller that can collect the voltage signal of the line in real time and compare it with a set reference voltage. When the collected voltage signal is greater than the reference voltage, and the difference reaches a certain value and after a time delay, the controller issues a control command to drive the on-load tap-changer to lower the gear, thereby reducing the output voltage; conversely, when the collected voltage signal is less than the reference voltage, the controller issues a control signal after a time delay to drive the on-load tap-changer to raise the gear and increase the output voltage, so as to realize the automatic regulation of the line voltage and keep it stable within the set range.

[0003] Existing transformers are usually installed on a utility pole for use. During the installation process, it is necessary to first fix the angle steel frame on the utility pole through bolts, and then use bolts to fix the transformer to the angle steel frame to complete the installation. This process requires secondary fixation and cannot directly install the transformer on the utility pole, resulting in low installation efficiency and inconvenience in use. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies in the background art and propose a distribution transformer for power grids.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A distribution transformer for power grids includes a transformer body and a base fixedly installed at the lower end of the transformer body. A turning shaft is penetrated and embedded at the end of the base. A frame base is rotatably installed on the outer surface of the turning shaft. A fixing frame is penetrated and embedded at the upper end of the frame base. A fixing sleeve is slidably installed on the outer surface of the fixing frame. A connecting frame extends from the front end of the fixing sleeve. Arc-shaped clamping seats are fixedly installed at the ends of the connecting frame and the fixing frame respectively. The two arc-shaped clamping seats are symmetrically arranged. Angle clamping seats extend from the front and rear ends of the arc-shaped clamping seats. A fixing column is elastically installed through the rear end of the fixing sleeve. The fixing column penetrates the rear end face of the fixing frame. Pulling ears are embedded at both ends of the turning shaft. Top seats are installed at the ends of the two pulling ears. A frame sleeve is installed between the ends of the two top seats. An adapting frame extends from the side of the arc-shaped clamping seat located on the connecting frame. The frame sleeve is slidably installed on the outer surface of the adapting frame. A synchronizing member is provided between the adapting frame and the frame sleeve.

[0006] Preferably, a main housing is slidably mounted on the outer surface of the fixed column. Main frames are fixedly installed at both the upper and lower ends of the main housing. The end of the main frame is fixed to the fixed sleeve. An adaptation groove is formed on the rear end surface of the fixed frame. The adaptation groove is strip-shaped, and the fixed column is inserted into the interior of the adaptation groove.

[0007] Preferably, a main cap is coaxially embedded on the outer surface of the fixed column. The main cap is slidably mounted inside the main housing. A main spring is wound around the outside of the fixed column. One end of the main spring is fixed to the rear end of the main cap, and the other end of the main spring is fixed to the rear end inside the main housing. A main hand ring is fixedly installed at the rear end of the fixed column.

[0008] Preferably, an ear frame is fixedly installed at the front edge of the lower end of the fixed frame. An ear column is elastically installed through the lower end of the ear frame. A positioning ear is embedded at the end of the ear column. The positioning ear abuts against the side surface of the front dial ear.

[0009] Preferably, a receiving cavity is hollowed out at the lower end of the ear frame. The ear column passes through the interior of the receiving cavity. A push plate is embedded on the outer surface of the ear column. The push plate is slidably mounted inside the receiving cavity. A positioning spring is wound around the outside of the ear column. One end of the positioning spring is fixed to the push plate, and the other end of the positioning spring is fixed to the inner wall of the receiving cavity.

[0010] Preferably, the synchronizing member includes a sub-housing installed at the upper end of the frame sleeve. A fitting column is coaxially arranged inside the sub-housing. Both ends of the fitting column penetrate through the upper and lower ends of the sub-housing respectively. The fitting column is slidably engaged with the sub-housing. The lower end of the fitting column sequentially penetrates through the upper end surface of the frame sleeve and the upper end surface of the adaptation frame. The fitting column is slidably engaged with the frame sleeve.

[0011] Preferably, a fitting groove is formed near the edge of the upper end surface of the adaptation frame. The lower end of the fitting column is inserted into the interior of the fitting groove. A sub-cap is coaxially embedded on the outer surface of the fitting column. The sub-cap is slidably mounted inside the sub-housing. A sub-spring is wound around the outside of the fitting column. One end of the sub-spring is fixed to the sub-cap, and the other end of the sub-spring is fixed to the upper end inside the sub-housing. A sub-hand ring is fixedly installed at the upper end of the fitting column. Two sub-frames symmetrically extend from the outer surface of the sub-housing. The end of the sub-frame is fixed to the frame sleeve.

[0012] Preferably, a first connecting shaft is penetrated and embedded at the end of the dial ear. The top seat is rotatably mounted on the outer surface of the first connecting shaft. Second connecting shafts extend from both the front and rear ends of the frame sleeve. The end of the top seat is rotatably mounted on the outer surface of the second connecting shaft.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. When the transformer body is hoisted to the installation position on the pole, the connecting frame can be manually toggled. At this time, the fixed sleeve slides on the fixed frame, causing the arc-shaped clamping seat to move towards the pole. When the two arc-shaped clamping seats embrace the pole, the fixed column just moves to the adaptation groove. At this time, the fixed column is pushed into the adaptation groove under the action of the main spring to fix the moved arc-shaped clamping seat, enabling the arc-shaped clamping seat to embrace the pole to complete the installation of the transformer body. This process can directly install the transformer body on the pole, effectively improving the installation efficiency and facilitating use. At the same time, when installing the transformer body on a circular pole, the arc-shaped clamping seat can adapt to the arc surface of the circular pole for clamping installation. When installing the transformer body on a square pole, the angle clamping seat can adapt to the right-angle side of the square pole for clamping installation, so as to flexibly adapt to square or circular poles for installation to meet the usage requirements.

[0014] 2. When the arc-shaped clamping seat moves towards the pole, the adaptation frame will slide within the frame sleeve to adapt to the movement of the arc-shaped clamping seat. When the arc-shaped clamping seat embraces the pole, the assembly groove on the adaptation frame just aligns with the assembly column. At this time, the assembly column is pushed into the assembly groove under the action of the auxiliary spring, making the adaptation frame and the frame sleeve form a whole. Then, release the suspended transformer body. At this time, the turning shaft will rotate under the gravity of the transformer body, and then drive the ear lever to rotate to push the top seat, so as to squeeze the arc-shaped clamping seat on the connecting frame towards the pole. At this time, the fixed column displaces within the adaptation groove to adapt to the movement of the arc-shaped clamping seat. In this way, under the gravity extrusion of the transformer body, the arc-shaped clamping seat is firmly clamped on the pole to ensure that the transformer body will not fall after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a distribution transformer for a power grid according to the present invention; Figure 2 is a schematic view of the arc-shaped clamping seat of a distribution transformer for a power grid according to the present invention; Figure 3 is an internal view of the ear frame of a distribution transformer for a power grid according to the present invention; Figure 4 is an internal view of the main housing of a distribution transformer for a power grid according to the present invention; Figure 5 is an internal view of the auxiliary housing of a distribution transformer for a power grid according to the present invention; Figure 6 is a schematic view of the top seat of a distribution transformer for a power grid according to the present invention; Figure 7 is an installation view of the transformer body of a distribution transformer for a power grid according to the present invention and a circular pole; Figure 8 is an installation view of the transformer body of a distribution transformer for a power grid according to the present invention and a square pole.

[0016] In the figure: 1, transformer body; 2, frame base; 3, fixing frame; 4, arc clamping seat; 5, device base; 6, angle clamping seat; 7, adapting frame; 8, top seat; 9, dialing ear; 10, positioning ear; 11, ear frame; 12, turning shaft; 13, secondary shell; 14, frame sleeve; 15, fixing sleeve; 16, connecting frame; 17, main shell; 18, adapting groove; 19, main cap; 20, main spring; 21, fixing column; 22, main frame; 23, secondary frame; 24, secondary spring; 25, secondary cap; 26, assembling column; 27, assembling groove; 28, accommodating cavity; 29, push plate; 30, positioning spring; 31, ear column; 32, secondary hand ring; 33, main hand ring; 34, circular electric pole; 35, square electric pole; 36, first connecting shaft; 37, second connecting shaft. Specific embodiments

[0017] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0018] As Figures 1-8A distribution transformer for a power grid as shown includes a transformer body 1 and a base 5 fixedly installed at the lower end of the transformer body 1. The transformer body 1 is a smart line voltage regulating transformer and can be adapted to the power grid for use. The base 5 serves to carry the transformer body 1. A rotating shaft 12 is inserted through the end of the base 5. A frame base 2 is rotatably installed on the outer surface of the rotating shaft 12. A fixing frame 3 is inserted through the upper end of the frame base 2. The frame base 2 serves to connect the fixing frame 3. A fixing sleeve 15 is slidably installed on the outer surface of the fixing frame 3. The fixing sleeve 15 serves to guide the arc-shaped clamping seat 4. A connecting frame 16 extends from the front end of the fixing sleeve 15. The connecting frame 16 serves to fix the arc-shaped clamping seat 4 to the fixing sleeve 15. Arc-shaped clamping seats 4 are fixedly installed at the ends of both the connecting frame 16 and the fixing frame 3. The two arc-shaped clamping seats 4 are symmetrically arranged. Angle clamping seats 6 extend from the front and rear ends of the arc-shaped clamping seat 4. When the transformer body 1 is installed on a circular electric pole 34, the arc-shaped clamping seat 4 can be used to tightly hold the circular electric pole 34 by adapting to its arc surface. When the transformer body 1 is installed on a square electric pole 35, the angle clamping seat 6 can be used to tightly hold the right-angle side of the square electric pole 35. A fixing column 21 is elastically installed through the rear end of the fixing sleeve 15. The fixing column 21 passes through the rear end face of the fixing frame 3. The fixing column 21 can fix the fixing sleeve 15, so that the two arc-shaped clamping seats 4 remain in a state of tightly holding the electric pole. Pulling ears 9 are inserted at both ends of the rotating shaft 12. Top seats 8 are installed at the ends of the two pulling ears 9. A frame sleeve 14 is installed between the ends of the two top seats 8. Under the gravity of the transformer body 1, the rotating shaft 12 will rotate, thereby driving the pulling ear 9 to rotate, so as to push the top seat 8, and squeeze the arc-shaped clamping seat 4 on the connecting frame 16 towards the electric pole, so that the arc-shaped clamping seat 4 tightly holds the electric pole. An adapting frame 7 extends from the side of the arc-shaped clamping seat 4 on the connecting frame 16. The frame sleeve 14 is slidably installed on the outer surface of the adapting frame 7. When the arc-shaped clamping seat 4 moves towards the electric pole, the adapting frame 7 will slide within the frame sleeve 14 to adapt to the movement of the arc-shaped clamping seat 4. A synchronizing member is provided between the adapting frame 7 and the frame sleeve 14.

[0019] A main housing 17 is slidably installed on the outer surface of the fixing column 21. The main housing 17 serves to carry the fixing column 21. Main frames 22 are fixedly installed at both the upper and lower ends of the main housing 17. The main frames 22 serve to fix the main housing 17. The ends of the main frames 22 are fixed to the fixing sleeve 15. An adapting groove 18 is formed on the rear end face of the fixing frame 3. The adapting groove 18 is strip-shaped. After the fixing column 21 is inserted into the adapting groove 18, it can still displace within the adapting groove 18, so that when the rotating shaft 12 rotates to squeeze the arc-shaped clamping seat 4 towards the electric pole through the top seat 8, it will not be hindered by the fixing column 21. The fixing column 21 is inserted into the interior of the adapting groove 18.

[0020] The outer surface of the fixed column 21 is coaxially inlaid with a main cap 19, and the main cap 19 is slidably installed inside the main shell 17. The outer side of the fixed column 21 is wrapped with a main spring 20, and the main cap 19 plays a role of being pushed by the main spring 20. One end of the main spring 20 is fixed to the rear end of the main cap 19, and the other end of the main spring 20 is fixed to the inner rear end of the main shell 17. The main spring 20 plays a role of pushing the fixed column 21 into the adaptation groove 18. The rear end of the fixed column 21 is fixedly installed with a main bracelet 33, and the main bracelet 33 plays a role of facilitating the pulling of the fixed column 21.

[0021] An ear frame 11 is fixedly installed at the front edge of the lower end of the fixing frame 3, and an ear column 31 is elastically installed through the lower end of the ear frame 11. The ear frame 11 plays a role in bearing the ear column 31. A positioning ear 10 is inlaid at the end of the ear column 31. The positioning ear 10 is pressed against the side of the front dial ear 9. When the transformer body 1 is lifted, the positioning ear 10 will press against the dial ear 9 to limit the frame seat 2, so that the arc clamp seat 4 can be in an upright state during the suspension process to avoid flipping down, so as to facilitate the subsequent toggling of the arc clamp seat 4 to make it hold tightly on the pole.

[0022] The lower end of the ear frame 11 is hollowed out to form an accommodating cavity 28, and the ear column 31 passes through the interior of the accommodating cavity 28. The outer surface of the ear column 31 is inlaid with a push plate 29, and the push plate 29 is slidably installed in the interior of the accommodating cavity 28. A positioning spring 30 is wound around the outer side of the ear column 31. The accommodating cavity 28 serves to carry the positioning spring 30 and the push plate 29. One end of the positioning spring 30 is fixed to the push plate 29, and the other end of the positioning spring 30 is fixed to the inner wall of the accommodating cavity 28. When the flip shaft 12 rotates under the gravity of the transformer body 1, thereby driving the dial ear 9 to rotate, the positioning ear 10 is moved by the pushing of the dial ear 9, and the positioning spring 30 is deformed at the same time, so that the positioning ear 10 can move normally to avoid the positioning ear 10 hindering the rotation of the dial ear 9.

[0023] The synchronous part includes a sub-shell 13 installed on the upper end of the frame sleeve 14, and an assembling column 26 is coaxially arranged inside the sub-shell 13. The sub-shell 13 plays a role in supporting the assembling column 26. The two ends of the assembling column 26 pass through the upper and lower ends of the sub-shell 13 respectively, and the assembling column 26 slides with the sub-shell 13. The lower end of the assembling column 26 passes through the upper end surface of the frame sleeve 14 and the upper end surface of the adaptation frame 7 in turn. The assembling column 26 slides with the frame sleeve 14. The assembling column 26 can make the frame sleeve 14 and the adaptation frame 7 form a whole, so that the flip shaft 12 rotates under the gravity of the transformer body 1 to drive the dial ear 9 to rotate. When pushing the top seat 8, the thrust of the top seat 8 can be transmitted to the arc clamp seat 4 through the frame sleeve 14 and the adaptation frame 7.

[0024] An assembly groove 27 is provided near the edge of the upper end surface of the adaptor frame 7. The lower end of the assembly post 26 is inserted into the interior of the assembly groove 27. The assembly groove 27 functions to cooperate with the assembly post 26. A secondary cap 25 is coaxially inlaid on the outer surface of the assembly post 26. The secondary cap 25 is slidably installed inside the secondary housing 13. A secondary spring 24 is wound around the outside of the assembly post 26. The secondary cap 25 functions to be pushed by the secondary spring 24. One end of the secondary spring 24 is fixed to the secondary cap 25. The secondary spring 24 functions to push the assembly post 26 into the assembly groove 27. The other end of the secondary spring 24 is fixed to the upper end inside the secondary housing 13. A secondary hand ring 32 is fixedly installed at the upper end of the assembly post 26. The secondary hand ring 32 functions to facilitate pulling of the assembly post 26. Two secondary frames 23 symmetrically extend from the outer surface of the secondary housing 13. The ends of the secondary frames 23 are fixed to the housing sleeve 14. The secondary frames 23 function to fix the secondary housing 13.

[0025] A first connecting shaft 36 is inserted through and inlaid at the end of the ear lever 9. The top seat 8 is rotatably installed on the outer surface of the first connecting shaft 36. The first connecting shaft 36 functions to connect the ear lever 9 and the top seat 8 together. Second connecting shafts 37 extend from the front and rear ends of the housing sleeve 14. The end of the top seat 8 is rotatably installed on the outer surface of the second connecting shaft 37. The second connecting shafts 37 function to connect the housing sleeve 14 and the top seat 8 together.

[0026] During installation, the transformer body 1 can be lifted by a lifting device. At this time, the positioning ear 10 will be against the dial ear 9 to limit the frame seat 2, so that the arc clamp seat 4 can be in an upright state during the suspension process to avoid flipping down, so as to facilitate the subsequent toggling of the arc clamp seat 4 to make it hug the pole tightly. When the transformer body 1 is lifted to the installation position of the pole, the connecting frame 16 can be manually toggled. At this time, the fixing sleeve 15 slides on the fixing frame 3 to make the arc clamp seat 4 move toward the pole. At the same time, the adapting frame 7 will slide in the frame sleeve 14 to adapt to the movement of the arc clamp seat 4. When the two arc clamp seats 4 are hugged on the pole, the assembling groove 27 on the adapting frame 7 is just aligned with the assembling column 26, and the fixing column 21 is just moved to the adapting groove 18. At this time, the assembling column 26 is pushed into the assembling groove 27 under the action of the auxiliary spring 24, so that the adapting frame 7 and the frame sleeve 14 form a whole. The fixing column 21 Under the action of the main spring 20, it is pushed into the adaptation groove 18 to fix the moved arc-shaped clamp seat 4, so that the arc-shaped clamp seat 4 can be held on the pole to complete the installation of the transformer body 1. Then the suspended transformer body 1 is released. At this time, the flip shaft 12 will rotate under the gravity of the transformer body 1, thereby driving the dial ear 9 to rotate. At this time, the positioning ear 10 is moved by the top of the dial ear 9, and the positioning spring 30 is deformed, so that the positioning ear 10 can move normally to avoid the positioning ear 10 hindering the rotation of the dial ear 9. Then the rotating dial ear 9 is used to push the top seat 8 to squeeze the arc-shaped clamp seat 4 on the connecting frame 16 toward the pole. At this time, the fixed column 21 is displaced in the adaptation groove 18 to adapt to the movement of the arc-shaped clamp seat 4, so that the arc-shaped clamp seat 4 is firmly held on the pole under the gravity of the transformer body 1 to ensure that the transformer body 1 will not fall after installation.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A distribution transformer for a power grid, comprising a transformer body (1) and a pedestal (5) fixedly installed at the lower end of the transformer body (1), characterized in that: The end of the base (5) is penetrated and inlaid with a turning shaft (12). The outer surface of the turning shaft (12) is rotatably installed with a frame base (2). The upper end of the frame base (2) is penetrated and inlaid with a fixing frame (3). The outer surface of the fixing frame (3) is slidably installed with a fixing sleeve (15). The front end of the fixing sleeve (15) extends with a connecting frame (16). The ends of the connecting frame (16) and the fixing frame (3) are both fixedly installed with arc-shaped clamping seats (4). The two arc-shaped clamping seats (4) are symmetrically arranged. The front and rear ends of the arc-shaped clamping seat (4) both extend with corner clamping seats (6). The rear end of the fixing sleeve (15) is penetrated and elastically installed with a fixing column (21). The fixing column (21) penetrates through the rear end face of the fixing frame (3). Both ends of the turning shaft (12) are inlaid with dial ears (9). The ends of the two dial ears (9) are both installed with top seats (8). A frame sleeve (14) is installed between the ends of the two top seats (8). The side of the arc-shaped clamping seat (4) located on the connecting frame (16) extends with an adaptor frame (7). The frame sleeve (14) is slidably installed on the outer surface of the adaptor frame (7). A synchronizing member is arranged between the adaptor frame (7) and the frame sleeve (14).

2. The distribution transformer for power grid according to claim 1, characterized in that: The outer surface of the fixing column (21) is slidably installed with a main housing (17). The upper and lower ends of the main housing (17) are both fixedly installed with main frames (22). The ends of the main frames (22) are fixed to the fixing sleeve (15). The rear end face of the fixing frame (3) is provided with an adaption groove (18). The adaption groove (18) is strip-shaped. The fixing column (21) is inserted into the interior of the adaption groove (18).

3. The distribution transformer for a power grid according to claim 2, wherein: The outer surface of the fixing column (21) is coaxially inlaid with a main cap (19). The main cap (19) is slidably installed inside the main housing (17). A main spring (20) is wound around the outside of the fixing column (21). One end of the main spring (20) is fixed to the rear end of the main cap (19). The other end of the main spring (20) is fixed to the rear end inside the main housing (17). The rear end of the fixing column (21) is fixedly installed with a main hand ring (33).

4. A distribution transformer for a power grid according to claim 1, characterized in that: An ear frame (11) is fixedly installed at the front edge of the lower end of the fixing frame (3). The lower end of the ear frame (11) is penetrated and elastically installed with an ear column (31). The end of the ear column (31) is inlaid with a positioning ear (10). The positioning ear (10) abuts against the side of the front dial ear (9).

5. A distribution transformer for a power grid according to claim 4, characterized in that: The lower end of the ear frame (11) is hollowed out to form a receiving cavity (28). The ear column (31) passes through the interior of the receiving cavity (28). A push plate (29) is inlaid on the outer surface of the ear column (31). The push plate (29) is slidably installed inside the receiving cavity (28). A positioning spring (30) is wound around the outside of the ear column (31). One end of the positioning spring (30) is fixed to the push plate (29). The other end of the positioning spring (30) is fixed to the inner wall of the receiving cavity (28).

6. A distribution transformer for a power grid according to claim 1, characterized in that: The synchronization member includes a secondary housing (13) installed at the upper end of the housing sleeve (14). A fitting column (26) is coaxially arranged inside the secondary housing (13). Both ends of the fitting column (26) penetrate through the upper and lower ends of the secondary housing (13) respectively. The fitting column (26) is in sliding fit with the secondary housing (13). The lower end of the fitting column (26) sequentially penetrates through the upper end surface of the housing sleeve (14) and the upper end surface of the adaptor frame (7). The fitting column (26) is in sliding fit with the housing sleeve (14).

7. A distribution transformer for a power grid according to claim 6, characterized in that: An assembly groove (27) is formed at the upper end surface of the adaptor frame (7) near the edge. The lower end of the fitting column (26) is inserted into the interior of the assembly groove (27). A secondary cap (25) is coaxially embedded on the outer surface of the fitting column (26). The secondary cap (25) is slidably installed inside the secondary housing (13). A secondary spring (24) is wound around the outer side of the fitting column (26). One end of the secondary spring (24) is fixed to the secondary cap (25), and the other end of the secondary spring (24) is fixed to the upper end inside the secondary housing (13). A secondary hand ring (32) is fixedly installed at the upper end of the fitting column (26). Two secondary frames (23) symmetrically extend from the outer surface of the secondary housing (13). The ends of the secondary frames (23) are fixed to the housing sleeve (14).

8. A distribution transformer for a power grid according to claim 1, characterized in that: A first connecting shaft (36) is penetrated and embedded at the end of the ear lever (9). The top seat (8) is rotatably installed on the outer surface of the first connecting shaft (36). Second connecting shafts (37) extend from both the front and rear ends of the housing sleeve (14). The end of the top seat (8) is rotatably installed on the outer surface of the second connecting shaft (37).

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