A copper busbar routing structure for the three-phase low-voltage coil of an oil-immersed transformer.
By replacing the "匚"-shaped copper busbar with an L-shaped copper busbar in the three-phase low-voltage coil of an oil-immersed transformer, the problem of high processing difficulty was solved, and efficient processing and cost reduction of the copper busbar wiring structure were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENJIANG DAQO POWER TRANSFORMER CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-07-17
AI Technical Summary
The copper busbar routing structure of the existing three-phase low-voltage coil of oil-immersed transformer has the problems of high processing difficulty and long processing time, especially the bending processing of the "匚"-shaped copper busbar is more difficult.
The L-shaped copper busbar is used instead of the "匚"-shaped copper busbar. The lower end of the vertical copper busbar three is bent to form the end horizontal copper busbar three, which is then welded to the vertical copper busbar two. The other end extends to the left to form the end horizontal copper busbar two. Only two welding parts and one welding point are required.
It significantly reduces the difficulty of processing and welding, shortens the processing time, and improves the processing efficiency of copper busbar wiring structures, resulting in good economic benefits.
Smart Images
Figure CN224519654U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer technology, specifically to a copper busbar routing structure for the three-phase low-voltage coil of an oil-immersed transformer. Background Technology
[0002] A transformer is a static electrical device that uses the principle of electromagnetic induction to convert alternating current (AC) energy of one voltage level into AC energy of another. The main function of a transformer in a power system is to transform voltage to facilitate power transmission. Transformers can be classified into dry-type transformers and oil-immersed transformers according to their cooling method. An oil-immersed transformer mainly consists of a core, oil tank, cooling system, protection system, and lead-out devices. The core includes an iron core, coils, insulation components, and leads. The coils are wound around the iron core, and the leads include high-voltage leads, low-voltage leads, and a neutral wire.
[0003] like Figures 1-4As shown in the figure, a copper bar wiring structure for a three-phase low-voltage coil of an oil-immersed transformer includes a bracket 1, a first longitudinal copper bar 2, a second longitudinal copper bar 3, a third longitudinal copper bar 4, and a third end transverse copper bar 8. The bracket 1 includes two columns 1-1 corresponding to the left and right sides, and the two columns 1-1 are fixedly connected together by a number of transverse braces 1-2 spaced in the gap between them. A transverse clamping plate assembly 6 is provided on the rear side of the transverse brace 1-2. The first longitudinal copper bar 2, the second longitudinal copper bar 3, and the third longitudinal copper bar 4 are arranged in parallel at intervals on the rear side of the bracket 1, and the three are vertically and correspondingly clamped and fixed on the rear side of the transverse brace 1-2 through the transverse clamping plate assembly 6. The upper end of the first longitudinal copper bar 2 on the right side is bent to form a first end transverse copper bar 2-1 extending horizontally to the outside of the right side of the bracket 1, and the lower end is bent to form a third end transverse copper bar 2-3 extending horizontally to the outside of the right side of the bracket 1. The upper end of the third longitudinal copper bar 4 on the left side is bent to form a first end transverse copper bar 4-1 extending horizontally to the outside of the left side of the bracket 1, and the lower end is bent to form a transverse copper bar connecting section 4-3 extending horizontally to the left. The upper end of the second longitudinal copper bar 3 between the first longitudinal copper bar 2 and the third longitudinal copper bar 4 is bent to form a first end transverse copper bar 3-1 extending horizontally to the outside of the right side of the bracket 1, and the lower end is bent to form a third end transverse copper bar 3-3 extending horizontally to the outside of the left side of the bracket 1. The left end of the first end transverse copper bar 2-1 and the left end of the first end transverse copper bar 3-1 are fixedly clamped on the upper end of the rear side of the column 1-1 on the right side of the bracket 1 through a set of longitudinal clamping plate assemblies 5. The third end transverse copper bar 8 is horizontally perpendicular to the rear side of the bracket 1, and the left end of the third end transverse copper bar 2-3 and the left end of the third end transverse copper bar 8 are fixedly clamped on the lower end of the rear side of the column 1-1 on the right side of the bracket 1 through a set of longitudinal clamping plate assemblies 5. The right end of the first end transverse copper bar 4-1 is fixedly clamped on the upper end of the rear side of the column 1-1 on the left side of the bracket 1 through a set of longitudinal clamping plate assemblies 5. The middle of the third end transverse copper bar 3-3, the left end of the transverse copper bar connecting section 4-3, and the left end of the third end transverse copper bar 8 are fixedly clamped on the lower end of the rear side of the column 1-1 on the left side of the bracket 1 through a set of longitudinal clamping plate assemblies 5, and the copper bar connecting section 4-3 is located above the third end transverse copper bar 3-3, and the left end of the third end transverse copper bar 8 is located below the third end transverse copper bar 3-3. The copper bar connecting section 4-3 and the left end of the third end transverse copper bar 8 are welded and connected together by a "C"-shaped copper bar 7. An A-phase copper bar outgoing line joint 2-2 extending upward is welded to the right end of the upper side of the first end transverse copper bar 2-1. A B-phase copper bar outgoing line joint 3-2 extending upward is welded to the right end of the upper side of the first end transverse copper bar 3-1. A C-phase copper bar outgoing line joint 4-2 extending upward is welded to the right end of the upper side of the first end transverse copper bar 4-1;On the right end of the upper side of the first front-end horizontal copper bar 2-1, there is a tap a at the first end of the A-phase low-voltage coil. On the right end of the upper side of the second front-end horizontal copper bar 3-1, there is a tap b at the first end of the B-phase low-voltage coil. On the left end of the upper side of the third front-end horizontal copper bar 4-1, there is a tap c at the first end of the C-phase low-voltage coil. On the right end of the upper side of the third rear-end horizontal copper bar 8, there is a tap x at the end of the A-phase low-voltage coil. On the right end of the upper side of the first rear-end horizontal copper bar 2-3, there is a tap y at the end of the B-phase low-voltage coil. On the left end of the upper side of the second rear-end horizontal copper bar 3-3, there is a tap z at the end of the C-phase low-voltage coil. Since when the tap c at the first end of the C-phase low-voltage coil and the tap x at the end of the A-phase low-voltage coil are connected by the third longitudinal copper bar 4, the lower end of the third longitudinal copper bar 4 is welded and connected to the left end of the third rear-end horizontal copper bar 8 through the horizontal copper bar connection section 4-3 and the "C"-shaped copper bar 7, which involves three components and two welding points, and the bending process of the "C"-shaped copper bar 7 is relatively difficult, resulting in a more cumbersome and time-consuming overall manufacturing process for the copper bar wiring structure of the three-phase low-voltage coil. Therefore, the present utility model proposes a copper bar wiring structure for the three-phase low-voltage coil of an oil-immersed transformer in order to solve the above technical problems.; Summary of the Invention
[0004] The purpose of the present utility model is to overcome the defects existing in the prior art and provide a copper bar wiring structure for the three-phase low-voltage coil of an oil-immersed transformer. By bending the lower end of the third longitudinal copper bar to form a third rear-end horizontal copper bar that horizontally extends to the outside of the right side of the bracket, one end of the L-shaped copper bar is welded and connected to the lower end of the second longitudinal copper bar, and the other end horizontally extends to the outside of the left side of the bracket to form a second rear-end horizontal copper bar. Compared with the welding connection of the lower end of the third longitudinal copper bar, the horizontal copper bar connection section, and the left end of the third rear-end horizontal copper bar through the "C"-shaped copper bar, the bending process of the L-shaped copper bar is much easier than that of the "C"-shaped copper bar, and only one end of the L-shaped copper bar is welded and connected to the lower end of the second longitudinal copper bar, only involving two welding parts and one welding point. Therefore, the processing difficulty and welding difficulty of the copper bar wiring structure of the three-phase low-voltage coil of the oil-immersed transformer are significantly reduced, which helps to reduce the welding time, reduce costs and increase efficiency, and significantly improve the processing efficiency of the copper bar wiring structure of the three-phase low-voltage coil of the oil-immersed transformer, with good economic benefits.
[0005] To achieve the above object, the technical solution of the present utility model is to design a copper bar wiring structure for the three-phase low-voltage coils of an oil-immersed transformer, including a bracket. On the rear side of the bracket, a first longitudinal copper bar, a second longitudinal copper bar, and a third longitudinal copper bar are vertically and fixedly arranged at intervals from right to left. The upper end of the first longitudinal copper bar is bent to form a first leading-end transverse copper bar extending horizontally to the outside of the right side of the bracket, and the lower end is bent to form a first trailing-end transverse copper bar extending horizontally to the outside of the right side of the bracket. The upper end of the second longitudinal copper bar is bent to form a second leading-end transverse copper bar extending horizontally to the outside of the right side of the bracket. The upper end of the third longitudinal copper bar is bent to form a third leading-end transverse copper bar extending horizontally to the outside of the left side of the bracket. The first leading-end transverse copper bar has an A-phase copper bar outgoing line joint extending upward and an A-phase low-voltage coil leading-end tap at the end. The second leading-end transverse copper bar has a B-phase copper bar outgoing line joint extending upward and a B-phase low-voltage coil leading-end tap at the end. The third leading-end transverse copper bar has a C-phase copper bar outgoing line joint extending upward and a C-phase low-voltage coil leading-end tap at the end. The end of the first trailing-end transverse copper bar has a B-phase low-voltage coil trailing-end tap. The lower end of the third longitudinal copper bar is bent to form a third trailing-end transverse copper bar extending horizontally to the outside of the right side of the bracket, and the end of the third trailing-end transverse copper bar has an A-phase low-voltage coil trailing-end tap. It further includes an L-shaped copper bar. One end of the L-shaped copper bar is welded to the lower end of the second longitudinal copper bar, and the other end extends horizontally to the outside of the left side of the bracket to form a second trailing-end transverse copper bar. The end of the second trailing-end transverse copper bar has a C-phase low-voltage coil trailing-end tap.
[0006] For the copper bar wiring structure of the three-phase low-voltage coils of the oil-immersed transformer of the present utility model, by bending the lower end of the third longitudinal copper bar to form a third trailing-end transverse copper bar extending horizontally to the outside of the right side of the bracket, and welding one end of the L-shaped copper bar to the lower end of the second longitudinal copper bar and the other end extending horizontally to the outside of the left side of the bracket to form a second trailing-end transverse copper bar. Compared with the case where the lower end of the third longitudinal copper bar is welded to the left end of the third trailing-end transverse copper bar through a transverse copper bar connecting section and a "C"-shaped copper bar, the bending processing difficulty of the L-shaped copper bar is greatly reduced compared with that of the "C"-shaped copper bar. And the L-shaped copper bar is only welded to the lower end of the second longitudinal copper bar at one end, only involving two welding parts and one welding point, thus significantly reducing the component processing difficulty and welding difficulty of the copper bar wiring structure of the three-phase low-voltage coils of the oil-immersed transformer, which helps to reduce the welding time, reduce costs and increase efficiency, and significantly improve the processing efficiency of the copper bar wiring structure of the three-phase low-voltage coils of the oil-immersed transformer, with good economic benefits.
[0007] A preferred technical solution is that the support includes two columns located on the left and right sides respectively. The two columns are fixedly connected together by at least two transverse support rods spaced apart and fixed in the gap between them. A transverse clamping plate assembly is provided on the rear side of each transverse support rod. The three longitudinal copper busbars (one, two, and three) are clamped and fixed to the rear side of the transverse support rods by the transverse clamping plate assembly. The support structure is simple in design and highly feasible to manufacture and implement.
[0008] A further preferred technical solution includes the following: the left ends of the first and second first-end horizontal copper busbars are fixedly clamped to the upper rear side of the column on the right side of the support by a set of longitudinal clamping plate assemblies; the right end of the third first-end horizontal copper busbar is fixedly clamped to the upper rear side of the column on the left side of the support by a set of longitudinal clamping plate assemblies; the middle part of the second last-end horizontal copper busbar is fixedly clamped to the lower rear side of the column on the left side of the support by a set of longitudinal clamping plate assemblies; and the left ends of the first and third last-end horizontal copper busbars are fixedly clamped to the lower rear side of the column on the right side of the support by a set of longitudinal clamping plate assemblies. All horizontally positioned copper busbars are fixedly clamped to their corresponding columns by clamping plate assemblies, ensuring good overall structural stability of the copper busbar routing structure for the three-phase low-voltage coil of an oil-immersed transformer according to this invention.
[0009] A further preferred technical solution is that the middle part of the second transverse copper busbar is parallel to and attached to the lower end of the rear side of the column on the left side of the support, and the lower end of the third longitudinal copper busbar is vertically located behind the second transverse copper busbar. This ensures that the thickness of the copper busbar routing structure for the three-phase low-voltage coil of an oil-immersed transformer in this invention is not too large in the front-to-back direction, thereby ensuring good overall compactness.
[0010] A further preferred technical solution is that both the longitudinal clamping plate assembly and the transverse clamping plate assembly include a pressure plate and a bolt assembly passing through the pressure plate, and a groove for embedding a copper busbar is formed on one side of the pressure plate. The clamping plate assembly has a clever and reasonable structural design, and the copper busbar is embedded in the corresponding groove on the pressure plate, thereby further ensuring the clamping stability of the copper busbar on the bracket.
[0011] A further preferred technical solution is that each copper busbar and its corresponding clamping plate assembly are covered with an insulating layer. This ensures good overall conductivity of the copper busbar routing structure and excellent insulation barrier performance between the copper busbar and the support frame.
[0012] A further preferred technical solution is that the first, second, and third horizontal copper busbars at the first and third ends, the third horizontal copper busbar at the first end, and the upper and lower ends of the column are all provided with horizontal support legs along the front-to-back direction. The horizontal support legs help improve the stability of the copper busbar routing structure of the three-phase low-voltage coil of the oil-immersed transformer during installation and use.
[0013] A further preferred technical solution is that a channel steel support along the front - rear direction is fixedly arranged on the lower side surface of the horizontal support leg. The channel steel support further improves the stability of the horizontal support leg and helps to extend the service life of the horizontal support leg.
[0014] The advantages and beneficial effects of the present utility model are as follows:
[0015] 1. For the copper - bar wiring structure of the three - phase low - voltage coil of an oil - immersed transformer of the present utility model, by bending the lower ends of the three longitudinal copper bars to form end transverse copper bars three that horizontally extend to the outside of the right side of the support, and welding one end of the L - shaped copper bar to the lower end of the longitudinal copper bar two and the other end horizontally extending to the outside of the left side of the support to form end transverse copper bar two. Compared with the lower end of the longitudinal copper bar three being welded together with the left end of the end transverse copper bar three through a transverse copper - bar connection section and a "U" - shaped copper bar, the bending processing difficulty of the L - shaped copper bar is greatly reduced compared with that of the "U" - shaped copper bar. And the L - shaped copper bar is only welded to the lower end of the longitudinal copper bar two at one end, only involving two welded components and one welding point, thus significantly reducing the component processing difficulty and welding difficulty of the copper - bar wiring structure of the three - phase low - voltage coil of the oil - immersed transformer, helping to reduce the welding time, reduce costs and increase efficiency, and significantly improving the processing efficiency of the copper - bar wiring structure of the three - phase low - voltage coil of the oil - immersed transformer, with good economic benefits.
[0016] 2. The copper bars in the horizontal direction are all fixedly clamped on the corresponding columns through the clamping plate assemblies, ensuring good overall structural stability of the copper - bar wiring structure of the three - phase low - voltage coil of the oil - immersed transformer of the present utility model.
[0017] 3. The middle part of the end transverse copper bar two is parallel and adhered to the lower rear side of the column on the left side of the support, and the lower end of the longitudinal copper bar three is vertically located behind the end transverse copper bar two. Ensuring that the thickness dimension of the copper - bar wiring structure of the three - phase low - voltage coil of the oil - immersed transformer of the present utility model in the front - rear direction is not too large, thus ensuring good overall compactness.
[0018] 4. Both the longitudinal clamping plate assembly and the transverse clamping plate assembly include a pressing plate and a bolt assembly passing through the pressing plate, and a groove for embedding the copper bar is provided on one side surface of the pressing plate. The structure of the clamping plate assembly is ingeniously and reasonably designed, and the copper bar is embedded in the corresponding groove on the pressing plate, thus further ensuring the clamping and installation stability of the copper bar on the support.
[0019] 5. An insulating layer is coated between each copper bar and the corresponding clamping plate assembly. Ensuring good overall electrical conductivity of the copper - bar wiring structure and having good insulating barrier performance between the copper bar and the support. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1It is the front view of the copper bar routing structure of a three-phase low-voltage coil of an oil-immersed transformer in the background art;
[0021] Figure 2 It is Figure 1 The partial enlarged view at position H in
[0022] Figure 3 It is the left view of the copper bar routing structure of a three-phase low-voltage coil of an oil-immersed transformer in the background art;
[0023] Figure 4 It is Figure 3 The partial enlarged view at position K in
[0024] Figure 5 It is the front view of the copper bar routing structure of a three-phase low-voltage coil of an oil-immersed transformer for the present utility model;
[0025] Figure 6 It is Figure 5 The partial enlarged view at position S in
[0026] Figure 7 It is the left view of the copper bar routing structure of a three-phase low-voltage coil of an oil-immersed transformer for the present utility model;
[0027] Figure 8 It is Figure 7 The partial enlarged view at position T in
[0028] Figure 9 It is Figure 5 The top view of the copper bar routing structure of a three-phase low-voltage coil of an oil-immersed transformer in a sectional view along the F-F direction;
[0029] Figure 10 It is Figure 9 The partial enlarged view at position W in
[0030] In the figure: 1. Support; 2. Longitudinal copper bar one; 3. Longitudinal copper bar two; 4. Longitudinal copper bar three; 5. Longitudinal clamping plate assembly; 6. Transverse clamping plate assembly; 7. "C"-shaped copper bar; 8. End transverse copper bar three; 9. Horizontal support leg; 10. L-shaped copper bar; 11. Insulation layer; 12. Pressure plate; 13. Bolt assembly; 14. Channel steel support; 1-1. Column; 1-2. Transverse brace; 2-1. First-end transverse copper bar one; 2-2. A-phase copper bar outgoing line joint; 2-3. End transverse copper bar one; 3-1. First-end transverse copper bar two; 3-2. B-phase copper bar outgoing line joint; 3-3. End transverse copper bar two; 4-1. First-end transverse copper bar three; 4-2. C-phase copper bar outgoing line joint; 4-3. Transverse copper bar connecting section; a. A-phase low-voltage coil first-end tap; b. B-phase low-voltage coil first-end tap; c. C-phase low-voltage coil first-end tap; x. A-phase low-voltage coil end tap; y. B-phase low-voltage coil end tap; z. C-phase low-voltage coil end tap. Detailed Implementation
[0031] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.
[0032] Example
[0033] like Figures 5-10 As shown, a copper busbar routing structure for a three-phase low-voltage coil of an oil-immersed transformer includes a support 1. Vertically fixed longitudinal copper busbars 2, 3, and 4 are arranged from right to left on the rear side of the support 1. The longitudinal copper busbar 2 has a first-end transverse copper busbar 2-1 extending horizontally to the right outside the right side of the support 1 at its upper end and a second-end transverse copper busbar 2-3 extending horizontally to the right outside the right side of the support 1 at its lower end. The longitudinal copper busbar 3 has a first-end transverse copper busbar 3-1 extending horizontally to the right outside the right side of the support 1 at its upper end. The longitudinal copper busbar 4 has a first-end transverse copper busbar 4-1 extending horizontally to the left outside the left side of the support 1 at its upper end. The first-end transverse copper busbar 2-1 has an upward-extending A-phase copper busbar outlet connector 2-2 and an A-phase low-voltage coil first-end tap a located at its end. The first transverse copper busbar 3-1 has an upwardly extending B-phase copper busbar connector 3-2 and a B-phase low-voltage coil tap b at the end. The first transverse copper busbar 4-1 has an upwardly extending C-phase copper busbar connector 4-2 and a C-phase low-voltage coil tap c at the end. The end transverse copper busbar 2-3 has a B-phase low-voltage coil end tap y at the end. The lower end of the longitudinal copper busbar 4 is bent to form an end transverse copper busbar 8 extending horizontally to the right outside the right side of the support 1. The end transverse copper busbar 8 has an A-phase low-voltage coil end tap x at the end. It also includes an L-shaped copper busbar 10, one end of which is welded to the lower end of the longitudinal copper busbar 3, and the other end extends horizontally to the left outside the left side of the support 1 to form an end transverse copper busbar 3-3. The end transverse copper busbar 3-3 has a C-phase low-voltage coil end tap z at the end.
[0034] Preferably, the bracket 1 includes two columns 1-1 located on the left and right sides respectively. The two columns 1-1 are fixedly connected together by at least two transverse support rods 1-2 fixed at intervals in the gap between them. A transverse clamping plate assembly 6 is provided on the rear side of the transverse support rod 1-2. The three longitudinal copper busbars 1-2, 2-3, and 3-4 are clamped and fixed on the rear side of the transverse support rod 1-2 by the transverse clamping plate assembly 6.
[0035] Further preferably, the left end of the first-end horizontal copper bar 2-1 and the left end of the second-end horizontal copper bar 3-1 are fixedly clamped by a set of longitudinal clamping plates 5 at the upper end of the rear side of the column 1-1 on the right side of the bracket 1. The right end of the third-end horizontal copper bar 4-1 is fixedly clamped by a set of longitudinal clamping plates 5 at the upper end of the rear side of the column 1-1 on the left side of the bracket 1. The middle part of the second-end transverse copper bar 3-3 is fixedly clamped by a set of longitudinal clamping plates 5 at the lower end of the rear side of the column 1-1 on the left side of the bracket 1. The left end of the first-end transverse copper bar 2-3 and the left end of the third-end transverse copper bar 8 are fixedly clamped by a set of longitudinal clamping plates 5 at the lower end of the rear side of the column 1-1 on the right side of the bracket 1.
[0036] Further preferably, the middle part of the second-end transverse copper bar 3-3 is parallel and adhered to the lower end of the rear side of the column 1-1 on the left side of the bracket 1. The lower end of the third longitudinal copper bar 4 is vertically located behind the second-end transverse copper bar 3-3.
[0037] Further preferably, both the longitudinal clamping plate assembly 5 and the transverse clamping plate assembly 6 include a pressing plate 12 and a bolt assembly 13 passing through the pressing plate 12, and a groove for embedding a copper bar is provided on one side surface of the pressing plate 12.
[0038] Further preferably, an insulating layer 11 is coated between each copper bar and the corresponding clamping plate assembly.
[0039] Further preferably, horizontal legs 9 in the front-rear direction are provided at the upper and lower ends of the first-end horizontal copper bar 2-1, the second-end horizontal copper bar 3-1, the third-end horizontal copper bar 4-1, the third-end transverse copper bar 8, and the column 1-1.
[0040] Further preferably, a channel steel support 14 in the front-rear direction is fixedly provided on the lower side surface of the horizontal leg 9.
[0041] In a copper bar routing structure for a three-phase low-voltage coil of an oil-immersed transformer according to the present utility model, by bending the lower end of the third longitudinal copper bar to form a third-end transverse copper bar horizontally extending to the outside of the right side of the bracket, one end of the L-shaped copper bar is welded to the lower end of the second longitudinal copper bar, and the other end extends horizontally to the outside of the left side of the bracket to form a second-end transverse copper bar. Compared with the lower end of the third longitudinal copper bar being welded together with a transverse copper bar connection section, a "C"-shaped copper bar, and the left end of the third-end transverse copper bar, the bending processing difficulty of the L-shaped copper bar is greatly reduced compared with that of the "C"-shaped copper bar, and only one end of the L-shaped copper bar is welded to the lower end of the second longitudinal copper bar, only involving two welding parts and one welding point. Thus, the component processing difficulty and welding difficulty of the copper bar routing structure for the three-phase low-voltage coil of the oil-immersed transformer are significantly reduced, which helps to reduce the welding duration, reduce costs and increase efficiency, and significantly improve the processing efficiency of the copper bar routing structure for the three-phase low-voltage coil of the oil-immersed transformer, with good economic benefits.
[0042] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A copper busbar routing structure for a three-phase low-voltage coil of an oil-immersed transformer, comprising a bracket (1), wherein longitudinal copper busbar one (2), longitudinal copper busbar two (3), and longitudinal copper busbar three (4) are vertically fixed at intervals from right to left on the rear side of the bracket (1), wherein the upper end of the longitudinal copper busbar one (2) is bent to form a first transverse copper busbar one (2-1) extending horizontally to the right side outside the right side of the bracket (1), and the lower end is bent to form a second transverse copper busbar one (2-3) extending horizontally to the right side outside the right side of the bracket (1), wherein the upper end of the longitudinal copper busbar two (3) is bent to form a first transverse copper busbar two (3-1) extending horizontally to the right side outside the right side of the bracket (1), and the upper end of the longitudinal copper busbar three (4) is bent to form a second transverse copper busbar two (3-1) extending horizontally to the left side. The first transverse copper busbar three (4-1) extending to the left side of the bracket (1) has an upward-extending A-phase copper busbar connector (2-2) and an A-phase low-voltage coil first-end tap (a) at the end; the second transverse copper busbar two (3-1) has an upward-extending B-phase copper busbar connector (3-2) and a B-phase low-voltage coil first-end tap (b) at the end; the third transverse copper busbar three (4-1) has an upward-extending C-phase copper busbar connector (4-2) and a C-phase low-voltage coil first-end tap (c) at the end; and the end transverse copper busbar one (2-3) has a B-phase low-voltage coil end tap (y) at the end. The characteristic feature is that... The lower end of the longitudinal copper busbar three (4) is bent to form a transverse copper busbar three (8) extending horizontally to the right side of the bracket (1). The transverse copper busbar three (8) has an A-phase low-voltage coil end tap (x) at its end. It also includes an L-shaped copper busbar (10). One end of the L-shaped copper busbar (10) is welded to the lower end of the longitudinal copper busbar two (3), and the other end extends horizontally to the left side of the bracket (1) to form a transverse copper busbar two (3-3). The transverse copper busbar two (3-3) has a C-phase low-voltage coil end tap (z) at its end.
2. The copper bar cabling structure for three-phase low voltage coils of oil immersed transformer as claimed in claim 1, wherein, The bracket (1) includes two columns (1-1) located on the left and right sides respectively. The two columns (1-1) are fixedly connected together by at least two transverse support rods (1-2) fixed at intervals in the gap between them. A transverse clamping plate assembly (6) is provided on the rear side of the transverse support rod (1-2). The three longitudinal copper busbars (2), (3), and (4) are clamped and fixed on the rear side of the transverse support rod (1-2) by the transverse clamping plate assembly (6).
3. The copper bar cabling structure for three-phase low voltage coils of oil immersed transformers according to claim 2, characterized in that, The left ends of the first horizontal copper busbar 1 (2-1) and the left ends of the first horizontal copper busbar 2 (3-1) are fixedly clamped to the upper rear side of the column (1-1) located on the right side of the bracket (1) by a set of longitudinal clamping plate assemblies (5). The right end of the first horizontal copper busbar 3 (4-1) is fixedly clamped to the upper rear side of the column (1-1) located on the left side of the bracket (1) by a set of longitudinal clamping plate assemblies (5). The middle part of the second horizontal copper busbar 2 (3-3) is fixedly clamped to the lower rear side of the column (1-1) located on the left side of the bracket (1) by a set of longitudinal clamping plate assemblies (5). The left ends of the first horizontal copper busbar 1 (2-3) and the left ends of the third horizontal copper busbar 3 (8) are fixedly clamped to the lower rear side of the column (1-1) located on the right side of the bracket (1) by a set of longitudinal clamping plate assemblies (5).
4. The copper bar cabling structure for three-phase low voltage coils of oil immersed transformers according to claim 3, characterized in that, The middle part of the second transverse copper busbar (3-3) is parallel to the lower end of the rear side of the column (1-1) on the left side of the bracket (1), and the lower end of the third longitudinal copper busbar (4) is vertically located on the rear side of the second transverse copper busbar (3-3).
5. The copper bar cabling structure for the three-phase low voltage coil of the oil immersed transformer according to claim 4, characterized in that, The longitudinal clamping plate assembly (5) and the transverse clamping plate assembly (6) both include a pressure plate (12) and a bolt assembly (13) passing through the pressure plate (12), and a groove for embedding copper busbars is provided on one side of the pressure plate (12).
6. The copper bar cabling structure for the three-phase low voltage coil of the oil immersed transformer according to claim 5, characterized in that, Each copper busbar and its corresponding clamping plate assembly are covered with an insulating layer (11).
7. The copper bar cabling structure for three-phase low voltage coils of oil immersed transformers according to claim 6, characterized in that, The first horizontal copper busbar (2-1), the second horizontal copper busbar (3-1), the third horizontal copper busbar (4-1), the third horizontal copper busbar (8), and the column (1-1) are all provided with horizontal support legs (9) in the front-back direction at both the upper and lower ends.
8. The copper bar cabling structure for the three-phase low voltage coil of the oil immersed transformer according to claim 7, characterized in that, The horizontal support leg (9) is fixed with a channel steel support (14) along the front-rear direction on its lower side.