Grading ring special for partial discharge test of transformer
By designing an equalizing ring suitable for transformer partial discharge testing, the problem of the lack of universality of existing equalizing rings is solved, enabling convenient installation and adjustment, and improving test efficiency and result accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-03-10
AI Technical Summary
The lack of universality of existing equalizing rings leads to the need for redesign and manufacturing for different transformer models, increasing costs and affecting testing efficiency.
A voltage equalizing ring for transformer partial discharge testing was designed, comprising a connecting plate, a mounting mechanism, and an adjustment mechanism. Through the combination of the mounting and control parts, convenient installation and adjustment are achieved, adapting to transformers of different models and specifications.
The versatility of the equalizing ring has been improved, costs have been reduced, test efficiency and accuracy have been increased, and the convenience and stability of the test have been ensured.
Smart Images
Figure CN223986139U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of equalizing ring technology, specifically to an equalizing ring for transformer partial discharge testing. Background Technology
[0002] In the operation and maintenance of power systems, transformers, as core power equipment, are directly affected by the reliability of their insulation performance, which in turn impacts the safe and stable operation of the entire system. Partial discharge is one of the key factors affecting the insulation performance of transformers. It gradually erodes the transformer's insulation materials, shortens its service life, and may even lead to serious power accidents. Therefore, conducting partial discharge tests on transformers to accurately detect their insulation condition and promptly identify potential faults has become an important task in the power industry.
[0003] In the partial discharge test of transformers, the equalizing ring plays an indispensable and important role. The equalizing ring can effectively improve the electric field distribution on the transformer surface, avoid partial discharge phenomena caused by electric field concentration, and thus ensure the accuracy and reliability of the test results;
[0004] Due to the wide variety of transformer models and specifications, and the significant differences in structure and size among different transformers, existing equalizing rings mostly lack universality and are often only compatible with specific transformer models or specifications. When dealing with different transformers, it is necessary to redesign and manufacture dedicated equalizing rings, which increases costs and affects the efficiency of the test. When conducting partial discharge tests on various transformer models, it is necessary to frequently change different equalizing rings, which further affects the test efficiency. Therefore, a dedicated equalizing ring for transformer partial discharge testing is proposed. Utility Model Content
[0005] (a) Technical problems to be solved
[0006] To address the shortcomings of existing technologies, this utility model provides a dedicated equalizing ring for transformer partial discharge testing. This solves the problem that when dealing with different transformers, it is necessary to redesign and manufacture dedicated equalizing rings, which increases costs and affects the efficiency of the test. Furthermore, when conducting partial discharge tests on various transformer models, it is necessary to frequently replace different equalizing rings, which in turn affects the efficiency of the test.
[0007] (II) Technical Solution
[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: it includes two connecting plates, an upper equalizing ring and a lower equalizing ring, two sets of mounting mechanisms are respectively provided on the outer walls of the two connecting plates, and an adjustment mechanism is provided between the two connecting plates;
[0009] The installation mechanism includes an installation section and a control section;
[0010] The mounting section includes two sets of adjusting plates and two sets of mounting blocks, and the control section includes two threaded rods and two lifting rings.
[0011] Two sets of connecting rods are fixedly installed on the opposite sides of the two connecting plates. The opposite sides of the two sets of connecting rods are slidably connected to the adjacent sides of the two sets of adjusting plates. The outer walls of the two sets of adjusting plates are fixedly connected to the outer walls of the two sets of mounting blocks. The outer walls of the two sets of mounting blocks are bolted to the inner sides of the upper and lower equalizing rings, respectively.
[0012] Preferably, the adjusting mechanism includes a fixed rod, the bottom surface of which is fixedly connected to the top surface of the lower connecting plate, a lifting sleeve is slidably sleeved on the outer wall of the fixed rod, the top surface of the lifting sleeve is fixedly connected to the bottom surface of the upper connecting plate, a limit block is fixedly provided on the outer wall of the fixed rod, and the outer wall of the limit block is slidably connected to the inner side of the lifting sleeve.
[0013] Preferably, the two threaded rods are fixedly connected to the adjacent side of the two connecting plates and the opposite side of the two connecting plates, respectively. The outer walls of the two threaded rods are slidably connected to the inner sides of the two lifting rings, respectively. The outer walls of the two lifting rings are respectively hinged with two sets of control plates, and the outer walls of the two sets of control plates are respectively hinged to the outer walls of the two sets of adjustment plates.
[0014] Preferably, two control nuts are rotatably mounted on opposite sides of the two lifting rings via two bearing seats, and the inner sides of the two control nuts are threadedly connected to the outer walls of the two threaded rods.
[0015] Preferably, two limiting plates are slidably provided on the opposite sides of the two lifting rings, extending to the side of the two lifting rings near the two connecting plates. The opposite sides of the two limiting plates are fixedly connected to the opposite sides of the two connecting plates. Two sets of guide rails are fixedly provided on the opposite sides of the two sets of connecting rods. The outer walls of the two sets of guide rails are slidably connected to the inner sides of the two sets of adjusting plates.
[0016] Preferably, the outer wall of the fixed rod is provided with an extrusion groove, the outer wall of the lifting sleeve is provided with an extrusion bolt extending to the inner wall of the extrusion groove, the outer wall of the lifting sleeve is fixedly provided with a fixing nut, and the inner side of the fixing nut is threadedly connected to the outer wall of the extrusion bolt.
[0017] (III) Beneficial Effects
[0018] This utility model provides a voltage equalizing ring specifically for transformer partial discharge testing. It has the following beneficial effects:
[0019] (I) The voltage equalizing ring for partial discharge testing of this transformer has an installation mechanism divided into an installation section and a control section, which enables convenient and efficient installation, greatly reducing the time and labor costs required for installation. It also ensures the stability of the voltage equalizing ring during installation and use through limit plates and guide rails. At the same time, the control section can adjust the installation section to adapt to different models and specifications of voltage equalizing rings, reducing costs, improving versatility, and bringing convenience to the test work.
[0020] (II) The transformer partial discharge test special equalizing ring and adjustment mechanism allow for flexible and convenient adjustment of the distance between the upper and lower equalizing rings by manually controlling the lifting sleeve to move up and down. The lifting sleeve is reliably fixed by the compression bolts and fixing nuts, and the sliding connection between the limit block and the lifting sleeve enhances the stability during adjustment. This allows the equalizing ring to better adapt to different transformer structures, effectively improve the electric field distribution, avoid electric field concentration, improve the equalization effect, and ensure the accuracy and reliability of the partial discharge test results. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0022] Figure 2 This is a schematic diagram of the installation mechanism of this utility model;
[0023] Figure 3 This is a schematic diagram of the adjustment mechanism of this utility model;
[0024] Figure 4 This is a schematic diagram of the installation mechanism of this utility model;
[0025] Figure 5 This utility model Figure 2 Enlarged structural diagram of area A in the middle;
[0026] Figure 6 This utility model Figure 3 Enlarged structural diagram of region B.
[0027] In the diagram: 1. Connecting plate; 2. Upper equalizing ring; 3. Mounting mechanism; 31. Adjusting plate; 32. Mounting block; 33. Connecting rod; 34. Control plate; 35. Lifting ring; 36. Guide rail; 37. Limiting plate; 38. Control nut; 39. Threaded rod; 4. Adjusting mechanism; 41. Lifting sleeve; 42. Fixing rod; 43. Limiting block; 44. Fixing nut; 45. Extrusion bolt; 5. Lower equalizing ring. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] Please see Figure 1-6 The present invention provides a technical solution: including two connecting plates 1, an upper equalizing ring 2 and a lower equalizing ring 5, two sets of mounting mechanisms 3 are respectively provided on the outer walls of the two connecting plates 1, and an adjustment mechanism 4 is provided between the two connecting plates 1;
[0030] Installation mechanism 3 includes an installation section and a control section;
[0031] The mounting section includes two sets of adjusting plates 31 and two sets of mounting blocks 32, and the control section includes two threaded rods 39 and two lifting rings 35.
[0032] Two sets of connecting rods 33 are fixedly installed on opposite sides of two connecting plates 1. The opposite sides of the two sets of connecting rods 33 are slidably connected to the adjacent sides of two sets of adjusting plates 31. The outer walls of the two sets of adjusting plates 31 are fixedly connected to the outer walls of two sets of mounting blocks 32. The outer walls of the two sets of mounting blocks 32 are bolted to the inner sides of the upper equalizing ring 2 and the lower equalizing ring 5. Two threaded rods 39 are fixedly connected on opposite sides of two connecting plates 1. The outer walls of the two threaded rods 39 are slidably connected to the inner sides of two lifting rings 35. Two sets of control plates 34 are hinged to the outer walls of the two lifting rings 35. The outer walls of the two control plates 34 are respectively connected to the inner sides of the two sets of adjusting plates 31. The outer wall of the section plate 31 is hinged. Two control nuts 38 are rotatably provided on the opposite side of the two lifting rings 35 through two bearing seats. The inner sides of the two control nuts 38 are threadedly connected to the outer walls of the two threaded rods 39. Two limit plates 37 are slidably provided on the opposite side of the two lifting rings 35, extending to the side of the two lifting rings 35 near the two connecting plates 1. The adjacent side of the two limit plates 37 is fixedly connected to the opposite side of the two connecting plates 1. Two sets of guide rails 36 are fixedly provided on the opposite side of the two sets of connecting rods 33. The outer walls of the two sets of guide rails 36 are slidably connected to the inner sides of the two sets of adjusting plates 31.
[0033] The adjusting mechanism 4 includes a fixed rod 42, the bottom surface of which is fixedly connected to the top surface of the lower connecting plate 1. A lifting sleeve 41 is slidably sleeved on the outer wall of the fixed rod 42, the top surface of which is fixedly connected to the bottom surface of the upper connecting plate 1. A limit block 43 is fixedly installed on the outer wall of the fixed rod 42, and the outer wall of the limit block 43 is slidably connected to the inner side of the lifting sleeve 41. An extrusion groove is opened on the outer wall of the fixed rod 42. An extrusion bolt 45 is provided through the outer wall of the lifting sleeve 41 and extends to the inner wall of the extrusion groove. A fixing nut 44 is fixedly installed on the outer wall of the lifting sleeve 41, and the inner side of the fixing nut 44 is threadedly connected to the outer wall of the extrusion bolt 45.
[0034] When in use, the two control nuts 38 are manually rotated when installing the upper equalizing ring 2 and the lower equalizing ring 5. When the two control nuts 38 rotate, the two lifting rings 35 can move up and down through the two threaded rods 39 and the two limit plates 37. When the two lifting rings 35 move up and down, the positions of the two sets of adjustment plates 31 can be adjusted through the two sets of control plates 34, so that the two sets of mounting blocks 32 can contact the inner sides of the upper equalizing ring 2 and the lower equalizing ring 5 respectively. At this time, the two sets of mounting blocks 32 can be connected and fixed to the inner sides of the upper equalizing ring 2 and the lower equalizing ring 5 through the two sets of bolts.
[0035] After the upper equalizing ring 2 and the lower equalizing ring 5 are installed, if the distance between them needs to be adjusted, simply control the lifting sleeve 41 to move up and down manually. During the up and down movement of the lifting sleeve 41, the distance between the upper equalizing ring 2 and the lower equalizing ring 5 can be adjusted. After the adjustment is completed, manually control the compression bolt 45 to rotate. When the compression bolt 45 rotates, the inner wall of the groove can be squeezed by the fixing nut 44, thereby fixing the lifting sleeve 41.
[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A special grading ring for partial discharge test of transformer, comprising two connecting plates (1), an upper grading ring (2) and a lower grading ring (5), characterized in that: Two outer walls of the two connecting plates (1) are respectively provided with two groups of mounting mechanisms (3), and an adjusting mechanism (4) is arranged between the two connecting plates (1); The mounting mechanism (3) comprises a mounting part and a control part; The mounting part comprises two groups of adjusting plates (31) and two groups of mounting blocks (32), and the control part comprises two threaded rods (39) and two lifting rings (35); Two groups of connecting rods (33) are fixedly arranged on the far side surfaces of the two connecting plates (1) respectively, the far side surfaces of the two groups of connecting rods (33) are slidably connected to the near side surfaces of the two groups of adjusting plates (31), the outer walls of the two groups of adjusting plates (31) are fixedly connected to the outer walls of the two groups of mounting blocks (32), and the outer walls of the two groups of mounting blocks (32) are boltedly connected to the inner side surfaces of the upper and lower equalizing rings (2) and (5).
2. The partial discharge test dedicated grading ring for transformer of claim 1, wherein: The adjusting mechanism (4) comprises a fixing rod (42), the bottom surface of the fixing rod (42) is fixedly connected to the top surface of the lower connecting plate (1), a lifting sleeve (41) is slidably sleeved on the outer wall of the fixing rod (42), the top surface of the lifting sleeve (41) is fixedly connected to the bottom surface of the upper connecting plate (1), a limiting block (43) is fixedly arranged on the outer wall of the fixing rod (42), and the outer wall of the limiting block (43) is slidably connected to the inner side surface of the lifting sleeve (41).
3. The partial discharge test dedicated grading ring for transformer of claim 1, wherein: The near side surfaces of the two threaded rods (39) are fixedly connected to the far side surfaces of the two connecting plates (1) respectively, the inner side surfaces of the two threaded rods (39) are slidably connected to the outer walls of the two lifting rings (35), and the outer walls of the two lifting rings (35) are hingedly provided with two groups of control plates (34).
4. The partial discharge test dedicated grading ring for transformer of claim 3, wherein: The far side surfaces of the two lifting rings (35) are rotatably provided with two control nuts (38) through two bearing seats respectively, the inner side surfaces of the two control nuts (38) are threadedly connected to the outer walls of the two threaded rods (39).
5. The partial discharge test dedicated grading ring for transformer of claim 3, wherein: The far side surfaces of the two lifting rings (35) are slidably and penetratively provided with two limiting plates (37) extending to the sides of the two lifting rings (35) close to the two connecting plates (1), the near side surfaces of the two limiting plates (37) are fixedly connected to the far side surfaces of the two connecting plates (1), and the far side surfaces of the two groups of connecting rods (33) are fixedly provided with two groups of guide rails (36).
6. The partial discharge test dedicated grading ring for transformer of claim 2, wherein: The outer wall of the fixing rod (42) is provided with an extrusion groove, the outer wall of the lifting sleeve (41) is penetratively provided with an extrusion bolt (45) extending to the inner wall of the extrusion groove, and the outer wall of the lifting sleeve (41) is fixedly provided with a fixing nut (44), and the inner side surface of the fixing nut (44) is threadedly connected to the outer wall of the extrusion bolt (45).