Novel insulating end ring structure
The integrated insulating paper ring structure simplifies design drawings, improves assembly efficiency, and enhances the operational reliability of transformers, solving the problems of complex insulation structures and low assembly efficiency in existing technologies.
Patent Information
- Application Number
- CN202520438882.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-13
AI Technical Summary
Existing transformers have complex insulation structures, low assembly efficiency, poor equipment reliability, and are prone to partial discharge due to assembly deviations.
The integrated insulating paper ring structure, including a circular paper ring and an L-shaped cardboard, low-voltage insulating pads and high-voltage insulating pads, simplifies the design drawings, improves assembly efficiency, and avoids partial discharge caused by assembly deviations through integrated design.
Reduce the types of design drawings, improve assembly efficiency, ensure transformer quality, enhance equipment operational reliability, and avoid partial discharge.
Smart Images
Figure CN223956432U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of transformer structure, especially a novel insulation end ring structure. BACKGROUND
[0002] Power transformer is an important equipment for converting electric energy in power system. Generally speaking, the higher the voltage level is, the lower the power grid system loss is, but the requirement for main insulation level is more strict.
[0003] Among them, the transformer body insulation belongs to a part of main insulation, specifically including two aspects: one is the insulation from coil to grounding part (core and oil tank), mainly end insulation; two is the insulation from coil to other coil, mainly the main insulation between homophase coils. This kind of insulation mostly adopts the type of oil-separator and oil cylinder-oil gap.
[0004] Taking a double-winding 110kV on-load voltage regulating power transformer as an example, the transformer body insulation condition is as shown in the figure. Figure 5 Specifically, the insulation structure of the lower part of the pressing plate 106 and the upper part of the low-voltage coil 102, the upper part of the high-voltage coil 103 and the voltage regulating insulation ring 105 of the voltage regulating coil 104 is composed of low-voltage insulation end ring 108, high-voltage insulation end ring 109, high-voltage angle ring 107 and iron yoke separator 110. Among them, the low-voltage insulation end ring 108 adopts paper ring + pad block structure, in which the pad block is downward for pressing the coil. The high-voltage insulation end ring is also paper ring + pad block structure, but the paper ring is downward for pressing the coil. The paper ring is processed by 1 piece of 2mm thick paper board, as shown in the figure, with an outer diameter of D and an inner diameter of d. A plurality of conventional pad blocks 111 and slotted pad blocks 112 are uniformly distributed on the paper ring, and the slotted pad block 112 is as shown in the figure, with the total number of single-phase pad blocks consistent with the number of coil pad blocks, usually 12, 16, 20, 24, etc. Among them, the iron yoke separator 110 is as shown in the figure, with its size parameters related to the transformer body insulation. Specifically, the arc surface radius RA cooperates with the slotted pad block 112; B=M0 / 2-5, B is the integer downward of 5 calculated, M0 is the center distance between adjacent two-phase core columns of the core 101; C is generally 150-230mm. Figure 6 Figure 7 Figure 8
[0005] Therefore, the above-mentioned insulation structure design is as follows:
[0006] 1. The structure design is complex, three drawings of low-voltage insulation end ring, high-voltage insulation end ring and iron yoke separator need to be designed, and the matching relationship needs to be considered, resulting in relatively complex structure design.
[0007] 2. The assembly efficiency is low, it needs to be paid attention that the pad blocks on the low-voltage insulation end ring are installed downward, while the pad blocks of the high-voltage insulation end ring are installed upward and cooperate with the iron yoke separator, resulting in low worker assembly efficiency.
[0008] 3. The device has low reliability, the assembly gap between the high-voltage insulation end ring and the iron yoke partition plate is about 5mm, if the assembly is improper or the production and manufacturing deviation is caused, the gap is increased or reduced, partial cavity and residual air may be caused, the partial discharge probability is increased, and the device reliability is affected. Practical new type
[0009] In order to solve the above problems of the prior art, the utility model provides a novel insulation end ring structure, optimizes the structure design, improves the assembly efficiency and the device reliability.
[0010] In order to achieve the above purpose, the utility model adopts the technical scheme that:
[0011] Firstly, the utility model provides a novel insulation end ring structure, including integrated insulation paper ring, low-voltage insulation pad and high-voltage insulation pad, the integrated insulation paper ring includes circular ring paper ring and L-shaped paper board connected with the outer edge of the circular ring paper ring, the horizontal side of the L-shaped paper board is flush with the circular ring paper ring, and the vertical side is perpendicular to the circular ring paper ring, the low-voltage insulation pad is uniformly distributed along the inner diameter of the circular ring paper ring, and the high-voltage insulation pad is uniformly distributed along the outer diameter of the circular ring paper ring.
[0012] The inner diameter of the circular ring paper ring corresponds to the inner diameter of the low-voltage coil, the outer diameter of the circular ring paper ring corresponds to the outer diameter of the voltage regulating coil, and the integrated insulation paper ring is located below the pressing plate.
[0013] The utility model has the advantages that through the optimization of the structure design that the paper ring part of the low-voltage insulation end ring and the high-voltage insulation end ring is integrally formed with the iron yoke partition plate, only one drawing needs to be designed, the design drawing type is reduced, the design efficiency is improved, and material waste is reduced. Meanwhile, only one integrally formed insulation end ring needs to be placed, and one-time adjustment and installation are needed, without the assembly and adjustment of the low-voltage insulation end ring, the high-voltage insulation end ring, the iron yoke partition plate and other components, the worker assembly efficiency is improved. In addition, the integrally formed insulation end ring design avoids partial discharge caused by assembly process or production and manufacturing process deviation, ensures the quality of the transformer, and improves the device reliability.
[0014] Optionally, the integrated insulation paper ring is stacked by two paper boards.
[0015] Optionally, the integrated insulation paper ring is bonded by two 1mm paper boards.
[0016] According to the above description, by changing the original 2mm paper board into two 1mm paper boards bonded, the paper board bending is facilitated.
[0017] Optionally, the L-shaped paperboard is bent at a preset distance from the outer edge of the circular paper ring.
[0018] Optionally, the distribution of the low-voltage insulation pads is consistent with the number of low-voltage coil pads, and the distribution of the high-voltage insulation pads is consistent with the number of high-voltage coil pads.
[0019] Optionally, two long holes are arranged on the vertical side of the L-shaped paperboard. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 A cooperation schematic view of a novel insulation end ring structure of an embodiment of the present application in a transformer;
[0021] Figure 2 A front view of a novel insulation end ring structure of an embodiment of the present application;
[0022] Figure 3 A side view of a novel insulation end ring structure of an embodiment of the present application;
[0023] Figure 4 A top view of a novel insulation end ring structure of an embodiment of the present application;
[0024] Figure 5 A cooperation schematic view of a body insulation structure of the prior art in a transformer;
[0025] Figure 6 A structural schematic view of a high-voltage insulation end ring of the prior art;
[0026] Figure 7 A structural schematic view of a slotted pad of the prior art;
[0027] Figure 8 A structural schematic view of an iron yoke partition plate of the prior art.
[0028] BRIEF DESCRIPTION OF DRAWINGS
[0029] 1, integral insulation paper ring; 11, circular paper ring; 12, L-shaped paperboard; 121, long hole;
[0030] 2, low-voltage insulation pad;
[0031] 3, high-voltage insulation pad;
[0032] 101, iron core; 102, low-voltage coil; 103, high-voltage coil; 104, voltage regulating coil; 105, voltage regulating insulation ring; 106, pressing plate; 107, high-voltage angle ring; 108, low-voltage insulation end ring; 109, high-voltage insulation end ring; 110, iron yoke partition plate; 111, conventional pad; 112, slotted pad. DETAILED DESCRIPTION
[0033] In order to better understand the above technical solutions, the exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided so that the present application can be more clearly and thoroughly understood, and the scope of the present application can be completely conveyed to those skilled in the art.
[0034] Embodiment one
[0035] Please refer to Figures 1 to 4 , the novel insulation end ring structure provided in the embodiment includes an integrated insulation paper ring 1, a low-voltage insulation pad 2 and a high-voltage insulation pad 3.
[0036] As shown in Figure 2 , the integrated insulation paper ring 1 includes a circular ring paper ring 11 and an L-shaped paperboard 12 connected to the outer edge of the circular ring paper ring 11, the horizontal side of the L-shaped paperboard 12 is flush with the circular ring paper ring 11, and the vertical side is perpendicular to the circular ring paper ring 11. The low-voltage insulation pad 2 is uniformly distributed along the inner diameter of the circular ring paper ring 11, and the high-voltage insulation pad 3 is uniformly distributed along the outer diameter of the circular ring paper ring 11. The matching structure of the three can be referred to Figure 3 and Figure 4 .
[0037] Among them, the inner diameter of the circular ring paper ring 11 corresponds to the inner diameter of the low-voltage coil 102, specifically, the inner diameter d1 of the circular ring paper ring 11 is equal to the inner diameter of the low-voltage coil 102 plus 4mm. The outer diameter of the circular ring paper ring 11 corresponds to the outer diameter of the voltage regulating coil 104, specifically, the outer diameter of the circular ring paper ring 11 is the same as the outer diameter of the voltage regulating coil 104.
[0038] Therefore, as shown in Figure 1 , the integrated insulation paper ring 1 is located below the pressing plate 106, and correspondingly, the low-voltage insulation pad 2 and the high-voltage insulation pad 3 are arranged on the integrated insulation paper ring 1 away from the pressing plate 106 on one side, and are located at the upper part corresponding to the low-voltage coil 102, the high-voltage angle ring 107 and the voltage regulating insulation ring 105.
[0039] Among them, since it is not easy to bend directly using a 2mm paperboard, in the embodiment, the integrated insulation paper ring 1 is stacked by two paperboards, preferably, the integrated insulation paper ring 1 is bonded by two 1mm paperboards, so as to facilitate bending.
[0040] Among them, the L-shaped paperboard 12 is bent at a preset distance from the outer edge of the circular ring paper ring 11. Among them, the preset distance is C in Figure 8 , which is usually 150-230mm. As shown inFigure 2 and 4 As shown in the figure, the L-shaped paperboard 12 is equivalent to the function of the iron yoke partition, the bending angle RB is 90°; B=M0 / 2-5, the calculated B is rounded down to 5, M0 is the distance between the centers of two adjacent iron core columns of the iron core 101; the height of the vertical part is 350mm; E is the distance between the two webs of the iron core 101+40mm.
[0041] Wherein, the number of low-voltage insulation blocks 2 and the number of high-voltage insulation blocks 3 can not be consistent. However, the distribution of low-voltage insulation blocks 2 on the circular paper ring 11 is consistent with the number of low-voltage coil 102 blocks, and the distribution of high-voltage insulation blocks 3 on the circular paper ring 11 is consistent with the number of high-voltage coil 103 blocks. This consistency includes position and quantity, such as 12, 16, 20, 24, etc.
[0042] As shown in the figure, the L-shaped paperboard 12 is equivalent to the function of the iron yoke partition, the bending angle RB is 90°; B=M0 / 2-5, the calculated B is rounded down to 5, M0 is the distance between the centers of two adjacent iron core columns of the iron core 101; the height of the vertical part is 350mm; E is the distance between the two webs of the iron core 101+40mm. Figure 3 As shown in the figure, the L-shaped paperboard 12 is equivalent to the function of the iron yoke partition, the bending angle RB is 90°; B=M0 / 2-5, the calculated B is rounded down to 5, M0 is the distance between the centers of two adjacent iron core columns of the iron core 101; the height of the vertical part is 350mm; E is the distance between the two webs of the iron core 101+40mm.
[0043] In summary, the embodiment has the following advantages:
[0044] 1. The embodiment optimizes the structure design of the integral molding of the paper ring part of the low-voltage insulation end ring 108 and the high-voltage insulation end ring 109 and the iron yoke partition 110, compared with the previous three insulation structures, only one drawing needs to be designed, reducing the types of design drawings, improving the design efficiency, and reducing material waste.
[0045] 2. The embodiment only needs to place one integral molded insulation end ring and adjust and install it once, without assembling and adjusting multiple components such as the low-voltage insulation end ring 108, the high-voltage insulation end ring 109, and the iron yoke partition 110, improving the assembly efficiency of workers.
[0046] 3. The integral molded insulation end ring design avoids partial discharge caused by deviations in the assembly process or production process, ensures the quality of the transformer, and improves the reliability of equipment operation.
[0047] Therefore, it should be noted that the specific selection of each module in the embodiment is a specific example for illustration, and in other equivalent embodiments, models that can meet the corresponding functions can be replaced.
[0048] In the description of the utility model, it is necessary to understand that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.
[0049] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0050] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact of the first and second features, or indirect contact of the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature, can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature, can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is lower than that of the second feature.
[0051] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.
[0052] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can modify, modify, replace and change the above embodiments within the scope of the utility model.
Claims
1. A novel insulation end ring structure characterized by, The integrated insulation paper ring, the low-voltage insulation pad and the high-voltage insulation pad, the integrated insulation paper ring comprises a circular ring paper ring and an L-shaped paperboard connected with the outer edge of the circular ring paper ring, the horizontal side of the L-shaped paperboard is flush with the circular ring paper ring, and the vertical side is perpendicular to the circular ring paper ring, the low-voltage insulation pad is uniformly distributed along the inner diameter of the circular ring paper ring, and the high-voltage insulation pad is uniformly distributed along the outer diameter of the circular ring paper ring. The inner diameter of the circular ring paper ring corresponds to the inner diameter of the low-voltage coil, the outer diameter of the circular ring paper ring corresponds to the outer diameter of the voltage regulating coil, and the integrated insulation paper ring is located below the pressing plate.
2. A novel insulation end turn structure according to claim 1, characterized in that, The integrated insulation paper ring is stacked by two paperboards.
3. A novel insulation end turn structure according to claim 2, characterized in that The integrated insulation paper ring is bonded by two paperboards with a thickness of 1mm.
4. A new type of insulation end ring structure according to any one of claims 1 to 3, characterized in that, The L-shaped paperboard is bent at a preset distance from the outer edge of the circular ring paper ring.
5. A new type of insulation end ring structure according to any one of claims 1 to 3, characterized in that, The distribution of the low-voltage insulation pad on the circular ring paper ring is consistent with the number of low-voltage coil pads, and the distribution of the high-voltage insulation pad on the circular ring paper ring is consistent with the number of high-voltage coil pads.
6. A new type of insulation end ring structure according to any one of claims 1 to 3, characterized in that, Two long holes are arranged on the vertical side of the L-shaped paperboard.