A low-voltage outgoing line structure and transformer

Abstract

This utility model proposes a low-voltage output structure and transformer, relating to the technical field of transformer coils. It includes: an upper low-voltage coil, an upper low-voltage coil lead-out busbar, a lower low-voltage coil, a lower low-voltage coil lead-out busbar, and a housing. The upper and lower low-voltage coils are fixed inside the housing in a stacked manner. The upper low-voltage coil lead-out busbar extends from the upper end of the upper low-voltage coil and connects to the upper end of the housing. The lower low-voltage coil lead-out busbar extends from the upper end of the lower low-voltage coil and passes through the interior of the upper low-voltage coil from bottom to top, connecting to the upper end of the housing. This invention effectively reduces the lead-out busbar length and structural dimensions, preventing localized overheating.

Description

Technical Field

[0001] This utility model relates to the technical field of transformer coils, and in particular to a low-voltage output structure and transformer. Background Technology

[0002] In power systems, transformers, as one of the core devices, undertake the important tasks of voltage transformation and power transmission. Their performance directly affects the stability and reliability of the entire power system. The low-voltage outgoing line structure, as an important component of the transformer, has a crucial impact on the transformer's operating performance due to its rational design.

[0003] Currently, with the continuous development of the power industry, the performance requirements for transformers are increasing. Users hope that transformers can achieve higher power transmission in a smaller space to meet the growing power demand. Existing technology discloses a low-voltage output structure, including a lower low-voltage coil lead-out bus, an upper low-voltage coil lead-out bus, an upper low-voltage coil, a housing, and a lower low-voltage coil. The upper and lower low-voltage coils are fixed inside the housing. The lower low-voltage coil lead-out bus extends from the lower end of the coil and is led upwards to the upper cover of the housing. This design results in an excessively long lead-out bus, increasing not only its weight but also its resistance loss. Under a specific voltage, some dimensions in this structure are fixed, while the lower low-voltage... The coil leads need to be led out from the bottom to the top along the tank wall and occupy a certain space, which increases the width of the tank structure, thereby increasing the weight of the tank wall, bottom, and cover. At the same time, the amount of transformer oil inside also increases. Moreover, the lower low-voltage coil leads face the tank wall and a large current flows through it, resulting in significant stray losses at the tank wall. This can cause local overheating of the transformer oil near the tank wall, and the generated gas may trigger the transformer gas alarm, leading to a power outage for maintenance and causing significant losses to the user. Utility Model Content

[0004] To address the issues of excessively long lead-out bars, large structural dimensions, and susceptibility to localized overheating in low-voltage outgoing line structures, this invention proposes a low-voltage outgoing line structure and transformer that effectively reduces lead-out bar length and structural dimensions, preventing localized overheating.

[0005] To achieve the above-mentioned technical effects, the technical solution of this utility model is as follows:

[0006] A low-voltage output structure includes: an upper low-voltage coil, an upper low-voltage coil lead-out bar, a lower low-voltage coil, a lower low-voltage coil lead-out bar, and a housing. The upper low-voltage coil and the lower low-voltage coil are fixed inside the housing in a stacked manner. The upper low-voltage coil lead-out bar extends from the upper end of the upper low-voltage coil and connects to the upper end of the housing. The lower low-voltage coil lead-out bar extends from the upper end of the lower low-voltage coil and passes through the interior of the upper low-voltage coil from bottom to top, connecting to the upper end of the housing.

[0007] In this technical solution, the upper low-voltage coil lead-out is first led out from the upper end of the upper low-voltage coil and connected to the upper end of the enclosure. The lower low-voltage coil lead-out is then led out from its upper end and passed through the interior of the upper low-voltage coil from bottom to top to connect to the upper end of the enclosure. This shortens the length of the lower low-voltage coil lead-out, reduces its weight, lowers resistance loss, and improves power transmission efficiency. Furthermore, when the low-voltage coil voltage is constant, the distance from the lower low-voltage coil to the enclosure wall and the radial radius of the lower low-voltage coil are both constant, reducing the size of the enclosure structure and consequently reducing the amount of transformer oil inside. Moreover, the lower low-voltage coil lead-out does not pass through the enclosure walls, avoiding stray losses from the enclosure walls and localized overheating of the transformer oil. This prevents gas alarms caused by localized overheating, ensuring the reliability and stability of the transformer operation.

[0008] Preferably, the enclosure includes a bottom, walls, and a cover. The lower end of the walls is connected to the bottom, and the upper end of the walls is connected to the cover. The bottom, walls, and cover provide a stable mounting frame for the entire low-voltage outgoing line structure.

[0009] Preferably, a fixing seat is provided on the bottom of the enclosure. The upper low-voltage coil and the lower low-voltage coil are fixed on the fixing seat in a stacked manner, with a spatial gap between them and the enclosure wall. The fixing seat at the bottom of the enclosure provides stable support for the upper and lower low-voltage coils, ensuring that they do not shake or shift during operation, thus improving the stability of their operation. On the other hand, the spatial gap with the enclosure wall effectively reduces heat conduction and electromagnetic interference between the coils and the enclosure wall, reduces stray losses from the enclosure wall, avoids local overheating, and improves the safety and efficiency of transformer operation.

[0010] Preferably, the upper low-voltage coil lead-out bar includes a first lead-out line and a second lead-out line in parallel. The first lead-out line and the second lead-out line are respectively led out from the upper end of the upper low-voltage coil and connected to the box cover. This dual lead-out line design increases the current transmission path, can effectively share the current load, reduce the current density of each lead-out line, thereby reducing the resistance loss and heat generation of the lead-out line and improving the power transmission efficiency.

[0011] Preferably, the upper end of the upper low-voltage coil is provided with a first wire insertion port and a second wire insertion port. The first lead wire is led out from the first wire insertion port and connected to the upper end of the housing, and the second lead wire is led out from the second wire insertion port and connected to the housing cover. Providing dedicated first and second wire insertion ports at the upper end of the upper low-voltage coil for leading out the first and second lead wires respectively and connecting them to the housing cover ensures a more standardized and orderly routing of the lead wires, avoiding messy distribution of lead wires within the housing, reducing mutual interference between lead wires, and facilitating installation and maintenance of the lead wires, thereby improving the operability and reliability of the structure.

[0012] Preferably, the lower low-voltage coil lead-out bar includes a third lead and a fourth lead. The third and fourth leads extend from the upper end of the lower low-voltage coil and pass through the interior of the upper low-voltage coil from bottom to top to connect with the enclosure cover. This design, using the third and fourth leads extending from the upper end of the lower low-voltage coil and passing through the interior of the upper low-voltage coil from bottom to top to connect with the enclosure cover, shortens the lead-out bar length, reduces its weight, lowers resistance loss, and avoids stray losses and localized overheating problems that may occur when the lead-out bar passes through the enclosure wall.

[0013] Preferably, the lower end of the upper low-voltage coil is provided with a third and a fourth wire-passing port, the upper end of the upper low-voltage coil is provided with a fifth and a sixth wire-passing port, and the upper end of the lower low-voltage coil is provided with a seventh and an eighth wire-passing port. The center line connecting the third, fifth, and seventh wire-passing ports is parallel to the vertical direction, and the center line connecting the fourth, sixth, and eighth wire-passing ports is parallel to the vertical direction. Specific threading ports are provided at the lower end, upper end, and upper end of the upper low-voltage coil, respectively. The center line connecting the third, fifth, and seventh threading ports is parallel to the vertical direction, and the center line connecting the fourth, sixth, and eighth threading ports is also parallel to the vertical direction. This design ensures that the third and fourth leads can be threaded along a predetermined path that is consistent in the vertical direction, making the lead-out path simpler and more direct. It reduces the bending and detours of the leads during the threading process, reduces the resistance loss and heat generation of the leads, and also facilitates the installation and maintenance of the leads.

[0014] Preferably, the third lead wire is led out from the seventh wire insertion port, and then passes through the fifth wire insertion port from bottom to top along the interior of the upper low-voltage coil, and connects to the tank cover; the fourth lead wire is led out from the eighth wire insertion port, and then passes through the sixth wire insertion port from bottom to top along the interior of the upper low-voltage coil, and connects to the tank cover. This precise wire insertion method allows the lead wires to make full use of the space inside the upper low-voltage coil, avoids contact with the tank wall, effectively reduces stray losses and local overheating, and improves the efficiency and reliability of transformer operation.

[0015] Preferably, the upper low-voltage coil and the lower low-voltage coil are composed of copper wire and an insulating mesh. The copper wire has good conductivity, which can ensure efficient current transmission in the coil and reduce resistance loss. The insulating mesh provides reliable insulation protection, prevents short circuits between coils and between coils and other components, improves the safety and reliability of the transformer, and also extends the service life of the coil and reduces maintenance costs.

[0016] The present invention also proposes a transformer, including the low-voltage outgoing line structure as described above.

[0017] Compared with the prior art, the beneficial effects of this utility model's technical solution are:

[0018] This utility model proposes a low-voltage output structure and transformer. First, the upper low-voltage coil lead-out busbar extends from the upper end of the upper low-voltage coil and connects to the upper end of the enclosure. The lower low-voltage coil lead-out busbar extends from its upper end and passes through the interior of the upper low-voltage coil from bottom to top to connect to the upper end of the enclosure. This shortens the length of the lower low-voltage coil lead-out busbar, reduces its weight, lowers resistance loss, and improves power transmission efficiency. Furthermore, when the low-voltage coil voltage is constant, the distance from the lower low-voltage coil to the enclosure wall and the radial radius of the lower low-voltage coil are both constant, allowing for a reduction in the size of the enclosure structure and consequently, a reduction in the amount of transformer oil inside the enclosure. Moreover, the lower low-voltage coil lead-out busbar does not pass through the enclosure walls around the enclosure, avoiding stray losses from the enclosure walls and localized overheating of the transformer oil. This prevents gas alarms caused by localized overheating, ensuring the reliability and stability of the transformer operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a low-voltage output structure proposed in an embodiment of the present invention;

[0020] Figure 2 This is another schematic diagram of a low-voltage output structure proposed in the embodiments of this utility model;

[0021] Figure 3This is a cross-sectional view of the upper low-voltage coil structure proposed in the embodiment of this utility model;

[0022] Figure 4 This is another structural cross-sectional view of the upper low-voltage coil proposed in the embodiment of this utility model;

[0023] Figure 5 This is a cross-sectional view of the lower low-voltage coil structure proposed in an embodiment of the present invention;

[0024] Figure 6 This is another structural cross-sectional view of the lower low-voltage coil proposed in the embodiment of this utility model;

[0025] 1. Upper low-voltage coil; 2. Upper low-voltage coil lead-out bar; 21. First lead-out wire; 22. Second lead-out wire; 3. Lower low-voltage coil; 4. Lower low-voltage coil lead-out bar; 41. Third lead-out wire; 42. Fourth lead-out wire; 5. Enclosure; 51. Enclosure bottom; 511. Fixing base; 52. Enclosure wall; 53. Enclosure cover. Detailed Implementation

[0026] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0027] To better illustrate this embodiment, some parts of the accompanying drawings may be omitted, enlarged, or reduced, and do not represent actual dimensions. The descriptions of directions such as "up" and "down" are not intended to limit the scope of this utility model.

[0028] It is understandable to those skilled in the art that some well-known details may be omitted from the accompanying drawings;

[0029] The terms used to describe positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0030] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0031] Example 1

[0032] See Figure 1 This invention proposes a low-voltage output structure, comprising: an upper low-voltage coil 1, an upper low-voltage coil lead-out 2, a lower low-voltage coil 3, a lower low-voltage coil lead-out 4, and a housing 5. The upper low-voltage coil 1 and the lower low-voltage coil 3 are fixed inside the housing 5 in a stacked manner. The upper low-voltage coil lead-out 2 extends from the upper end of the upper low-voltage coil 1 and connects to the upper end of the housing 5. The lower low-voltage coil lead-out 4 extends from the upper end of the lower low-voltage coil 3 and passes through the interior of the upper low-voltage coil 1 from bottom to top, connecting to the upper end of the housing 5.

[0033] See Figure 2The enclosure 5 includes a bottom 51, a wall 52, and a cover 53. The lower end of the wall 52 is connected to the bottom 51, and the upper end of the wall 52 is connected to the cover 53. The bottom 51, wall 52, and cover 53 provide a stable mounting frame for the entire low-voltage outgoing line structure.

[0034] A fixing seat 511 is provided on the bottom 51 of the transformer tank. The upper low-voltage coil 1 and the lower low-voltage coil 3 are fixed to the fixing seat 511 in a stacked manner, with a spatial gap between them and the tank wall 52. The fixing seat on the bottom 51 provides stable support for the upper and lower low-voltage coils 1 and 3, ensuring they do not shake or shift during operation, thus improving their operational stability. Furthermore, the spatial gap with the tank wall 52 effectively reduces heat conduction and electromagnetic interference between the upper and lower low-voltage coils 1 and 3 and the tank wall 52, reducing stray losses in the tank wall 52, preventing localized overheating, and improving the safety and efficiency of the transformer operation.

[0035] See Figures 2-4 The upper low-voltage coil lead-out row 2 includes a first lead-out line 21 and a second lead-out line 22 in parallel. The first lead-out line 21 and the second lead-out line 22 are respectively led out from the upper end of the upper low-voltage coil 1 and connected to the box cover 53. This dual lead-out line design increases the current transmission path, can effectively share the current load, reduce the current density of each lead-out line, thereby reducing the resistance loss and heat generation of the lead-out line and improving the power transmission efficiency.

[0036] The upper end of the upper low-voltage coil 1 is provided with a first wire-through port and a second wire-through port. The first lead wire 21 is led out from the first wire-through port and connected to the upper end of the housing 5, and the second lead wire 22 is led out from the second wire-through port and connected to the housing cover 53. The dedicated first and second wire-through ports at the upper end of the upper low-voltage coil are used to lead out the first and second lead wires respectively and connect them to the housing cover. This precise wire-through port design makes the lead wire routing more standardized and orderly, avoiding messy distribution of lead wires inside the housing, reducing mutual interference between lead wires, and facilitating the installation and maintenance of lead wires, thus improving the operability and reliability of the structure.

[0037] In this embodiment, the upper low-voltage coil lead-out is first led out from the upper end of the upper low-voltage coil and connected to the upper end of the housing. The lower low-voltage coil lead-out is then led out from its upper end and passed through the interior of the upper low-voltage coil from bottom to top to connect to the upper end of the housing. This shortens the length of the lower low-voltage coil lead-out, reduces its weight, lowers resistance loss, and improves power transmission efficiency. Furthermore, when the low-voltage coil voltage is constant, the distance A from the lower low-voltage coil to the housing wall and the radial radius E of the lower low-voltage coil are both constant values, which can reduce the dimensions W1 and W of the housing structure, where W1 is the distance from the housing wall to the central axis of the housing. This reduces the amount of transformer oil inside the housing. Additionally, the lower low-voltage coil lead-out does not pass through the housing walls around the housing, avoiding stray losses from the housing walls and localized overheating of the transformer oil. This prevents gas alarms caused by localized overheating, ensuring the reliability and stability of the transformer operation.

[0038] Example 2

[0039] See Figure 2 , Figure 5 and Figure 6 The lower low-voltage coil lead-out bar 4 includes a third lead-out wire 41 and a fourth lead-out wire 42. The third lead-out wire 41 and the fourth lead-out wire 42 are led out from the upper end of the lower low-voltage coil 3 and pass through the interior of the upper low-voltage coil 1 from bottom to top to connect with the box cover 53. The lower low-voltage coil lead-out bar uses the third lead-out wire and the fourth lead-out wire to lead out from the upper end of the lower low-voltage coil and pass through the interior of the upper low-voltage coil from bottom to top to connect with the box cover. This design shortens the lead-out bar length, reduces the weight of the lead-out bar, reduces resistance loss, and avoids stray losses and local overheating problems that may occur when the lead-out bar passes through the box wall.

[0040] The lower end of the upper low-voltage coil 1 is provided with a third and a fourth wire-passing port, the upper end of the upper low-voltage coil 1 is provided with a fifth and a sixth wire-passing port, and the upper end of the lower low-voltage coil 3 is provided with a seventh and an eighth wire-passing port. The center line connecting the third, fifth, and seventh wire-passing ports is parallel to the vertical direction, and the center line connecting the fourth, sixth, and eighth wire-passing ports is parallel to the vertical direction. Specific threading ports are provided at the lower end, upper end, and upper end of the upper low-voltage coil, respectively. The center line connecting the third, fifth, and seventh threading ports is parallel to the vertical direction, and the center line connecting the fourth, sixth, and eighth threading ports is also parallel to the vertical direction. This design ensures that the third and fourth leads can be threaded along a predetermined path that is consistent in the vertical direction, making the lead-out path simpler and more direct. It reduces the bending and detours of the leads during the threading process, reduces the resistance loss and heat generation of the leads, and also facilitates the installation and maintenance of the leads.

[0041] The third lead wire 41 originates from the seventh wire insertion port, then passes through the fifth wire insertion port from bottom to top along the interior of the upper low-voltage coil 1, and connects to the tank cover 53. The fourth lead wire 42 originates from the eighth wire insertion port, then passes through the sixth wire insertion port from bottom to top along the interior of the upper low-voltage coil 1, and connects to the tank cover 53. This precise wire threading method allows the lead wires to fully utilize the space inside the upper low-voltage coil, avoiding contact with the tank wall, effectively reducing stray losses and localized overheating, and improving the efficiency and reliability of transformer operation.

[0042] The upper low-voltage coil 1 and the lower low-voltage coil 3 are composed of copper wire and insulating mesh. The copper wire has good conductivity, which can ensure efficient current transmission in the coil and reduce resistance loss. The insulating mesh provides reliable insulation protection, preventing short circuits between coils and between coils and other components, improving the safety and reliability of the transformer, while also extending the service life of the coil and reducing maintenance costs.

[0043] Example 3

[0044] This embodiment also proposes a transformer, including the low-voltage output structure described in the above embodiment. The low-voltage output structure includes: an upper low-voltage coil 1, an upper low-voltage coil lead-out 2, a lower low-voltage coil 3, a lower low-voltage coil lead-out 4, and a housing 5. The upper low-voltage coil 1 and the lower low-voltage coil 3 are fixed inside the housing 5 in a stacked manner. The upper low-voltage coil lead-out 2 is led out from the upper end of the upper low-voltage coil 1 and connected to the upper end of the housing 5. The lower low-voltage coil lead-out 4 is led out from the upper end of the lower low-voltage coil 3 and passes through the interior of the upper low-voltage coil 1 from bottom to top to connect to the upper end of the housing 5.

[0045] In this embodiment, the upper low-voltage coil lead-out is first led out from the upper end of the upper low-voltage coil and connected to the upper end of the housing. The lower low-voltage coil lead-out is then led out from its upper end and passed through the interior of the upper low-voltage coil from bottom to top to connect to the upper end of the housing. This shortens the length of the lower low-voltage coil lead-out, reduces its weight, lowers resistance loss, and improves power transmission efficiency. Furthermore, when the low-voltage coil voltage is constant, the distance from the lower low-voltage coil to the housing wall and the radial radius of the lower low-voltage coil are both constant, reducing the size of the housing structure and consequently reducing the amount of transformer oil inside. Moreover, the lower low-voltage coil lead-out does not pass through the housing walls around the housing, avoiding stray losses from the housing walls and localized overheating of the transformer oil. This prevents gas alarms caused by localized overheating, ensuring the reliability and stability of the transformer operation.

[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A low voltage outlet structure, characterized by, include: The upper low-voltage coil (1), the upper low-voltage coil lead-out (2), the lower low-voltage coil (3), the lower low-voltage coil lead-out (4), and the housing (5) are stacked inside the housing (5). The upper low-voltage coil (1) and the lower low-voltage coil (3) are stacked inside the housing (5). The upper low-voltage coil lead-out (2) is led out from the upper end of the upper low-voltage coil (1) and connected to the upper end of the housing (5). The lower low-voltage coil lead-out (4) is led out from the upper end of the lower low-voltage coil (3) and passes through the interior of the upper low-voltage coil (1) from bottom to top and is connected to the upper end of the housing (5).

2. The low-voltage outlet structure of claim 1, wherein, The box body (5) includes a bottom (51), a wall (52) and a lid (53). The lower end of the wall (52) is connected to the bottom (51), and the upper end of the wall (52) is connected to the lid (53).

3. The low-voltage outlet structure of claim 2, wherein, A fixing seat (511) is provided on the bottom of the box (51). The upper low-voltage coil (1) and the lower low-voltage coil (3) are fixed on the fixing seat (511) in a stacked manner and are spaced apart from the box wall (52).

4. The low-voltage outlet structure of claim 2, wherein, The upper low-voltage coil lead-out row (2) includes a first lead-out line (21) and a second lead-out line (22) in parallel. The first lead-out line (21) and the second lead-out line (22) are respectively led out from the upper end of the upper low-voltage coil (1) and connected to the box cover (53).

5. The low-voltage outgoing line structure according to claim 4, characterized in that, The upper low-voltage coil (1) is provided with a first wire hole and a second wire hole at its upper end. The first lead wire (21) is led out from the first wire hole and connected to the upper end of the box (5). The second lead wire (22) is led out from the second wire hole and connected to the box cover (53).

6. The low-voltage outgoing line structure according to claim 2, characterized in that, The lower low-voltage coil lead-out bar (4) includes a third lead-out wire (41) and a fourth lead-out wire (42). The third lead-out wire (41) and the fourth lead-out wire (42) are led out from the upper end of the lower low-voltage coil (3) and pass through the interior of the upper low-voltage coil (1) from bottom to top to connect with the box cover (53).

7. The low-voltage outgoing line structure according to claim 6, characterized in that, The lower end of the upper low-voltage coil (1) is provided with a third and a fourth wire-passing port, the upper end of the upper low-voltage coil (1) is provided with a fifth and a sixth wire-passing port, and the upper end of the lower low-voltage coil (3) is provided with a seventh and an eighth wire-passing port. The center line connecting the third, fifth, and seventh wire-passing ports is parallel to the vertical direction, and the center line connecting the fourth, sixth, and eighth wire-passing ports is parallel to the vertical direction.

8. The low-voltage outgoing line structure according to claim 7, characterized in that, The third lead wire (41) is led out from the seventh wire hole, and then passes through the fifth wire hole from bottom to top along the inside of the upper low-voltage coil (1) and is connected to the box cover (53); the fourth lead wire (42) is led out from the eighth wire hole, and then passes through the sixth wire hole from bottom to top along the inside of the upper low-voltage coil (1) and is connected to the box cover (53).

9. The low-voltage outgoing line structure according to any one of claims 1-8, characterized in that, The upper low-voltage coil (1) and the lower low-voltage coil (3) are composed of copper wire and insulating mesh.

10. A transformer, characterized in that, Includes the low-voltage outgoing line structure as described in any one of claims 1-8.

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