High-low voltage integrated ascending flanged base for transformer
By designing a high and low voltage integrated lifting seat for transformers, the problem of too small insulation distance in the existing transformer fuel tank structure is solved, and higher stability and lower cost are achieved.
Patent Information
- Application Number
- CN202421639630.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The existing transformer oil tank structure lacks a high and low voltage integrated lifting seat, resulting in too small insulation distance at the high-voltage casing connection, which is prone to jitter and discharge, and design redundancy leads to high costs.
Design a high and low voltage integrated lifting seat for transformers, including lifting seat bent plate, magnetic steel plate, flange and connecting components. By welding the components and bent plates, high-voltage and low-voltage sleeves are installed to increase insulation distance and reduce the width of the fuel tank.
By increasing the insulation distance, the discharge risk is reduced and the operation stability of the transformer is improved. At the same time, the fuel tank width is reduced, manufacturing costs are reduced, and economic benefits are improved.
Smart Images
Figure CN223023004U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of power equipment, and specifically relates to a high-low voltage integrated riser for a transformer. Background Technique
[0002] With the continuous development of the new energy power generation market, the demand for new energy box-type substations is increasing. Among them, the triangular box-type substation occupies a certain market share with its unique advantages. As an important part of the box-type substation, the transformer has an important impact on the production cost and operation stability of the entire box-type substation. For the transformer supporting the triangular box-type substation, its high and low voltage bushings are located on the same panel side. The existing transformer oil tank structure has no riser or only a high-voltage riser. In this structure, the copper busbar at the low-voltage bushing is close to the tank wall, resulting in relatively large eddy current loss of the lead wire. The insulation distance between the high-voltage bushing connection and the transformer body and the tank wall is relatively small, resulting in the high-voltage lead wire connected to the high-voltage bushing being prone to jitter and discharge during the operation of the transformer, and even burning the transformer seriously. To ensure the stable operation of the transformer, generally, the width of the transformer oil tank is increased to ensure the insulation distance, which will generate a large design redundancy and increase the cost of the transformer.
[0003] To meet the actual needs of transformer design and manufacturing, it is urgent to develop a new structure to eliminate design redundancy, ensure product quality, and improve economic benefits. Summary of the Utility Model
[0004] To solve the deficiencies in the prior art, the utility model provides a high-low voltage integrated riser for a transformer, which reduces the width of the transformer oil tank, makes the structure of the transformer oil tank more compact, reduces the manufacturing cost, and improves the economic benefits; increases the insulation distance at the high and low voltage bushings inside the oil tank, reduces the discharge risk, and improves the operation stability of the transformer; increases the assembly space for the bushings, facilitates the installation of the bushings by production personnel, and improves the production efficiency.
[0005] The utility model adopts the following technical solutions.
[0006] A high-low voltage integrated riser for a transformer includes a riser bending plate, a non-magnetic steel plate, a flange and a connecting component. The riser bending plate is formed by bending a steel plate. The inside of the riser bending plate is connected to the connecting component, and the outside of the riser bending plate is connected to the non-magnetic steel plate and the flange. A low-voltage bushing is provided on the non-magnetic steel plate, and a high-voltage bushing is provided on the flange.
[0007] The high-low voltage integrated riser for the transformer is welded on the oil tank. A transformer body is provided inside the oil tank. The transformer body is connected to the low-voltage bushing through a low-voltage lead copper busbar and a connection piece, and the transformer body is connected to the high-voltage bushing through a high-voltage lead.
[0008] Furthermore, there is an opening on the elevated seat bending plate for connecting the non-magnetic steel plate. The non-magnetic steel plate is formed by connecting a rectangular steel plate and a triangular steel plate, and the rectangular steel plate is perpendicular to the triangular steel plate.
[0009] Furthermore, there is also an opening on the elevated seat bending plate for connecting the flange. The flange is arranged above the flange opening of the elevated seat bending plate, and the high-voltage bushing is connected to the flange.
[0010] Furthermore, the elevated seat bending plate is welded to the non-magnetic steel plate and the flange;
[0011] Blocking plates are welded at both ends of the elevated seat bending plate, and the bending angle of the elevated seat bending plate is 60 - 120°.
[0012] Furthermore, the connecting component includes a support plate and a wooden part. The support plate is welded inside the elevated seat bending plate, and the wooden part is connected to the support plate.
[0013] Furthermore, the low-voltage bushing is installed on the rectangular steel plate of the non-magnetic steel plate. The high-voltage lead of the transformer body is connected to the high-voltage bushing. The number of high-voltage bushings is 3, which are respectively connected to the high-voltage leads of phases A, B, and C.
[0014] Furthermore, the number of connecting components is three groups, and the high-voltage leads of phases A, B, and C are respectively tied to the wooden parts in the connecting components.
[0015] Furthermore, the flange can be welded to the upper plate surface or the lower plate surface of the elevated seat bending plate, so that the high-voltage bushing tilts upward or downward.
[0016] The beneficial effects of the present utility model are as follows compared with the prior art:
[0017] 1. Both the high-voltage bushing and the low-voltage bushing are installed on the high-low voltage integrated elevated seat, and the insulation distance from the bushing wiring point to the transformer body becomes larger, reducing the discharge risk and improving the operation stability of the transformer;
[0018] 2. The high-low voltage integrated elevated seat can reduce the width of the transformer oil tank, making the structure of the transformer oil tank compact and reasonable. The low-voltage lead copper bar is located inside the high-low voltage integrated elevated seat, reducing the eddy current loss caused by the too small distance between the low-voltage lead copper bar and the oil tank, reducing the manufacturing cost and improving the economic benefit;
[0019] 3. The high-voltage leads of phases A, B, and C of the transformer are all fixed through the support plates and wooden parts welded inside the high-low voltage integrated elevated seat, reducing the lead shaking, ensuring the insulation distance, and improving the operation stability of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is the front view of a high-low voltage integrated elevated seat for a transformer provided by the present utility model;
[0021] Figure 2 It is a top view of a high - and - low - voltage integrated riser for a transformer provided by the present utility model;
[0022] Figure 3 It is a schematic connection diagram of a non - magnetic steel plate, a support plate and a riser bending plate in a high - and - low - voltage integrated riser for a transformer provided by the present utility model;
[0023] Figure 4 It is a structural schematic diagram of the application of the high - and - low - voltage integrated riser to a transformer provided by the present utility model Figure 1 ;
[0024] Figure 5 It is a structural schematic diagram of the application of the high - and - low - voltage integrated riser to a transformer provided by the present utility model Figure 2 。
[0025] In the figure: riser bending plate 1, blanking plate 2, non - magnetic steel plate 3, flange 4, support plate 5, oil tank 6, transformer body 7, low - voltage lead copper busbar 8, connection piece 9, high - voltage lead 10, wooden part 11, high - voltage bushing 12, low - voltage bushing 13, distance L from the coil to the tank wall. Specific embodiments
[0026] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described in this application are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the spirit of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0027] As Figures 1-5 shown, a high - and - low - voltage integrated riser for a transformer includes a riser bending plate 1, a blanking plate 2, a non - magnetic steel plate 3, a flange 4 and a connection component. The outside of the riser bending plate 1 is connected to the non - magnetic steel plate 3 and the flange 4. A low - voltage bushing 13 is provided on the non - magnetic steel plate 3, and a high - voltage bushing 12 is provided on the flange 4; The high - and - low - voltage integrated riser for the transformer is welded to the oil tank 6. A transformer body 7 is provided inside the oil tank 6. The transformer body 7 is connected to the low - voltage bushing 13 through a low - voltage lead copper busbar 8 and a connection piece 9, and the transformer body 7 is connected to the high - voltage bushing 12 through a high - voltage lead 10.
[0028] The riser bending plate 1 is formed by bending a steel plate, and blanking plates 2 are welded at both ends of the riser bending plate 1. The bending angle of the riser bending plate 1 is 60 - 120°, preferably, the bending angle of the riser bending plate 1 is 90°.
[0029] The lifting seat bending plate 1 is provided with an opening for connecting the non-magnetic steel plate 3. The non-magnetic steel plate 3 is formed by connecting a rectangular steel plate and a triangular steel plate, and the rectangular steel plate is perpendicular to the triangular steel plate. The lifting seat bending plate 1 is also provided with an opening for connecting the flange 4. The flange 4 is arranged above the flange opening of the lifting seat bending plate 1, and the high-voltage bushing 12 is connected to the flange 4. The lifting seat bending plate 1 is connected to the non-magnetic steel plate 3 and the flange 4 by welding.
[0030] A connecting component is welded inside the lifting seat bending plate 1. The connecting component includes a support plate 5 and a wooden part 11. The support plate 5 is welded inside the lifting seat bending plate 1, and the wooden part 11 is connected to the support plate 5. The low-voltage bushing 13 is installed on the rectangular steel plate of the non-magnetic steel plate 3, and the number of the low-voltage bushings 13 is three. The high-voltage lead of the transformer body 7 is connected to the high-voltage bushing 12. The number of the high-voltage bushings 12 is three, which are respectively connected to the high-voltage leads of the A, B, and C phases. The number of the connecting components is three groups, and the high-voltage leads 10 of the A, B, and C phases are respectively tied to the wooden parts 11 in the connecting components.
[0031] The flange 4 can be welded on the upper plate surface or the lower plate surface of the lifting seat bending plate 1, so that the high-voltage bushing 12 tilts upward or downward, and it can be flexibly applied to transformers with different capacities.
[0032] The high and low voltage integrated lifting seat of the transformer is applicable to the case where the high-voltage bushing 12 and the low-voltage bushing 13 of the transformer are on the same side in a triangular-shaped box-type substation. Compared with the existing transformer structure, after adopting the high and low voltage integrated lifting seat, the distance L from the transformer body 7 to the box wall can be reduced by about 50 mm, which greatly reduces the consumption of transformer oil and steel plates, and significantly reduces the manufacturing cost of the transformer.
[0033] The beneficial effects of the present utility model are as follows compared with the prior art:
[0034] 1. The high and low voltage integrated lifting seat makes the transformer oil tank structure compact and reasonable. Since the high-voltage bushing and the low-voltage bushing are both installed on the high and low voltage integrated lifting seat, the insulation distance from the bushing wiring part to the transformer body becomes larger, reducing the discharge risk and improving the operation stability of the transformer.
[0035] 2. The low-voltage lead copper bar is located inside the high and low voltage integrated lifting seat, reducing the eddy current loss caused by the too small distance between the low-voltage lead copper bar and the oil tank, and improving the economic benefit.
[0036] 3. The high-voltage leads of the A, B, and C phases of the transformer are fixed through the support plates and wooden parts welded inside the high and low voltage integrated lifting seat, reducing the lead shaking, ensuring the insulation distance, and improving the operation stability of the transformer.
[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent substitutions can still be made to the specific embodiments of the present invention, and any modification or equivalent substitution that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.
Claims
1. A high-low voltage integrated riser for a transformer, comprising a riser bent plate (1), a non-magnetic steel plate (3), a flange (4) and a connecting assembly, characterized in that: The raised seat bending plate (1) is formed by bending a steel plate, the interior of the raised seat bending plate (1) is connected to the connection assembly, and the exterior of the raised seat bending plate (1) is connected to the non-magnetic steel plate (3) and the flange (4), the non-magnetic steel plate (3) is provided with a low-voltage bushing (13), and the flange (4) is provided with a high-voltage bushing (12); The transformer is welded to the oil tank (6) by a high-low voltage integrated lifting seat, a transformer body (7) is arranged inside the oil tank (6), the transformer body (7) is connected to the low-voltage bushing (13) through a low-voltage lead copper bar (8) and a connecting piece (9), and the transformer body (7) is connected to the high-voltage bushing (12) through a high-voltage lead (10).
2. The high and low voltage integrated riser for transformer according to claim 1, characterized in that: An opening for connecting a non-magnetic steel plate (3) is provided on the raised seat bent plate (1); the non-magnetic steel plate (3) is formed by connecting a rectangular steel plate and a triangular steel plate; the rectangular steel plate is perpendicular to the triangular steel plate.
3. The high and low voltage integrated riser for transformer according to claim 2, characterized in that: The raised seat bending plate (1) is also provided with an opening for connecting the flange (4), and the flange (4) is arranged above the flange opening of the raised seat bending plate (1); The raised seat bending plate (1) is welded to the non-magnetic steel plate (3) and the flange (4).
4. The high and low voltage integrated riser for transformer according to claim 3, characterized in that: Blocking plates (2) are welded at both ends of the lifting seat bending plate (1), and the bending angle of the lifting seat bending plate (1) is 60-120 degrees.
5. The high and low voltage integrated riser for transformer according to claim 4, characterized in that: The connection assembly comprises a support plate (5) and a wood piece (11); the support plate (5) is welded inside the raised seat bent plate (1); and the wood piece (11) is connected to the support plate (5).
6. The high and low voltage integrated riser for transformer according to claim 5, characterized in that: The low-voltage bushing (13) is installed on the rectangular steel plate of the non-magnetic steel plate (3), and the number of the low-voltage bushing (13) is 3; There are three high-voltage bushings (12), which are respectively connected to the A, B, and C three-phase high-voltage leads (10).
7. The high and low voltage integrated riser for transformer according to claim 6, characterized in that: The number of connection components is three groups, and the three-phase A, B, and C high-voltage leads (10) are respectively tied to wooden pieces (11) in the connection components.
8. The high and low voltage integrated riser for transformer according to claim 7, characterized in that: The flange (4) can be welded to the upper plate surface or the lower plate surface of the raised seat bent plate (1), so that the high-voltage bushing (12) is tilted upward or downward.