A porcelain bottle mounting structure of an oil-immersed transformer

Abstract

The utility model discloses a porcelain bottle mounting structure of oil -immersed transformer relates to transformer technical field, including transformer shell and porcelain bottle, and the transformer shell top wall is equipped with a plurality of porcelain bottle mounting hole, and its outer periphery interval week cloth porcelain bottle mounting assembly. The component contains the stud of shell top wall, the adjusting plate of sleeving in stud, locking nut and the pressure plate of connecting adjusting plate, and the adjusting plate one end is equipped with the expansion slot, and the slot bottom wall has expansion hole, and the pressure plate one end is equipped with the screw rod of cooperation with expansion hole, and the other end can press the porcelain bottle bottom pressure tight step, and the screw rod is on screw joint adjusting nut. Through the rotation adjusting plate, expansion adjusting pressure plate, can adapt to different size porcelain bottle, break the size limitation of traditional bolt fixed, and the installation versatility is improved greatly, reduces special purpose spare parts and mould investment, reduces production and inventory cost, and the adjustment operation is convenient, and the assembly and maintenance efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically to a porcelain insulator mounting structure for an oil-immersed transformer. Background Technology

[0002] In the assembly process of oil-immersed transformers, porcelain insulators, as critical insulating components, directly affect the insulation performance and operational safety of the equipment due to the stability of their connection with the transformer casing. Currently, the industry commonly uses bolts to install porcelain insulators at the mounting holes on the top wall of the transformer casing, directly locking the bottom of the insulator to the top wall of the casing with bolts.

[0003] However, the sizes of porcelain insulators that fit different models and specifications of oil-immersed transformers vary, especially the position and size of the clamping step at the bottom of the insulator. Traditional bolt-fixing structures lack adjustability, and one installation structure can only accommodate one specific size of porcelain insulator. When different sizes of porcelain insulators need to be installed, the transformer casing top wall with different mounting hole positions must be replaced accordingly, or custom-made special fixing connectors must be used. This not only increases production costs and inventory management difficulties but also reduces assembly efficiency, resulting in extremely poor versatility and making it difficult to meet diverse assembly needs. Utility Model Content

[0004] To address the shortcomings in the prior art, this utility model provides a porcelain insulator mounting structure for an oil-immersed transformer.

[0005] The technical solution adopted by this utility model is: a porcelain insulator mounting structure for an oil-immersed transformer, including a transformer shell and a porcelain insulator. A plurality of porcelain insulator mounting holes are provided at intervals on the top wall of the transformer shell. A plurality of porcelain insulator mounting components are arranged at intervals around the outer periphery of the porcelain insulator mounting holes. The porcelain insulator mounting components include studs provided on the top wall of the transformer shell, an adjusting plate fitted on the studs, a locking nut threaded with the studs, and a pressure plate connected to the adjusting plate. One end of the adjusting plate is provided with a telescopic groove that cooperates with the extension and retraction of the pressure plate, and telescopic holes are provided on both sides of the bottom wall of the telescopic groove; One end of the pressure plate is provided with a screw that expands and contracts with the telescopic hole, and the other end of the pressure plate can press against the pressing step at the bottom of the porcelain bottle. An adjusting nut is screwed onto the screw.

[0006] Furthermore, the stud is integrally formed with the top wall of the transformer housing.

[0007] Furthermore, the porcelain bottle mounting assembly consists of three parts, which are evenly spaced around the outer periphery of the porcelain bottle mounting hole.

[0008] Furthermore, the pressure plate is provided with an adapted arc-shaped concave surface at one end of the pressing step.

[0009] Furthermore, a stepped ring is provided around the outer periphery of the porcelain bottle mounting hole, a sealing groove is provided on the stepped ring, and a sealing ring is provided inside the sealing groove.

[0010] Furthermore, the contact surface between the pressure plate and the porcelain bottle pressing step is provided with an elastic buffer layer, which is made of vulcanized rubber or silicone and has a thickness of 2–5 mm.

[0011] The beneficial effects of this utility model are: 1. Improved installation versatility: This application utilizes the rotational engagement of the stud and the adjusting plate, and the telescopic engagement of the adjusting plate's telescopic groove and the pressure plate's screw, to flexibly adjust the circumferential position and radial extension length of the pressure plate. This allows the same set of installation components to be adapted to porcelain insulators of different sizes (especially those with differences in the position and size of the bottom clamping step), breaking the limitation of the traditional bolt-fixed structure of "one device, one set" and greatly enhancing the adaptability of the installation structure.

[0012] 2. Reduced operating costs: There is no need to design and manufacture transformer housing top walls with specific hole positions or customize special connectors for different sized porcelain insulators, which reduces the types of parts and investment in production molds; at the same time, it reduces the risk of inventory backlog of special parts, simplifies the inventory management process, and optimizes costs in the entire process from production to warehousing.

[0013] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages.

[0014] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0017] Figure 3 An exploded view of the assembly components for a porcelain insulator.

[0018] Figure 1-3 In the middle: 1. Transformer casing; 2. Porcelain insulator; 3. Porcelain insulator mounting hole; 4. Porcelain insulator mounting assembly; 5. Stud; 6. Adjusting plate; 7. Locking nut; 8. Pressure plate; 9. Expansion groove; 10. Expansion hole; 11. Screw; 12. Pressing step; 13. Adjusting nut; 14. Adaptive arc concave surface; 15. Step ring; 16. Sealing ring; 17. Elastic buffer layer. Detailed Implementation

[0019] 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.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0021] This utility model provides a porcelain insulator mounting structure for an oil-immersed transformer.

[0022] In this embodiment, refer to Figure 1-3 The porcelain insulator mounting structure of the oil-immersed transformer includes a transformer housing 1 and a porcelain insulator 2. A plurality of porcelain insulator mounting holes 3 are spaced apart on the top wall of the transformer housing. A plurality of porcelain insulator mounting components 4 are spaced apart around the outer periphery of the porcelain insulator mounting holes 3. The porcelain insulator mounting components 4 include studs 5 set on the top wall of the transformer housing, an adjusting plate 6 fitted on the studs 5, a locking nut 7 threaded with the studs, and a pressure plate 8 connected to the adjusting plate. One end of the adjusting plate is provided with a telescopic groove 9 that cooperates with the extension and retraction of the pressure plate, and telescopic holes 10 are provided on both sides of the bottom wall of the telescopic groove. One end of the pressure plate is provided with a screw 11 that is in conjunction with the telescopic hole, and the other end of the pressure plate can be pressed against the pressing step 12 at the bottom of the porcelain bottle. An adjusting nut 13 is screwed onto the screw.

[0023] In the above technical solution, the stud is fixed to the top wall of the transformer housing, and the adjusting plate is fitted onto the stud and can rotate around it to achieve circumferential position adjustment; the telescopic groove at the end of the adjusting plate forms a sliding fit with the screw at one end of the pressure plate, and the screw can extend and retract axially along the telescopic hole at the bottom wall of the telescopic groove to achieve radial length adjustment of the pressure plate; the locking nut is used to fix the rotational position of the adjusting plate, and the adjusting nut is used to lock the telescopic position of the pressure plate. Finally, the fixing is completed by pressing the pressing step at the bottom of the porcelain insulator with the other end of the pressure plate.

[0024] The above structural fixing method breaks the size limitations of traditional bolt fixing structures. It achieves adaptation to porcelain bottles with different bottom clamping step sizes and positions through dual adjustment of "rotation and extension", greatly improving installation versatility. There is no need to customize special installation structures for different porcelain bottles, reducing the types of parts and mold investment, and lowering production and inventory costs. The adjustment operation only requires turning the nut and rotating the adjustment plate, simplifying the assembly process and improving assembly and maintenance efficiency.

[0025] Specifically, the stud is integrally formed with the top wall of the transformer housing.

[0026] In this embodiment, the stud and the top wall of the transformer housing are integrally formed (such as casting or welding), making the stud an integral part of the top wall of the housing. There is no assembly gap between the two, and the clamping force on the stud can be directly transmitted to the main body of the housing, avoiding force transmission loss caused by assembly connection.

[0027] Specifically, there are three porcelain bottle mounting components, which are evenly spaced around the outer periphery of the porcelain bottle mounting holes.

[0028] In this embodiment, three porcelain bottle mounting components are distributed at 120° intervals around the porcelain bottle mounting holes, forming a triangular clamping layout. Utilizing the geometric stability of the triangle, the clamping force of the three pressure plates on the bottom of the porcelain bottle is evenly distributed in the circumferential direction, and the force of any one pressure plate can be balanced and supported by the other two pressure plates.

[0029] Specifically, the pressure plate is provided with an adapted arc-shaped concave surface 14 at one end of the pressing step.

[0030] In this embodiment, the end of the pressure plate that presses the porcelain bottle is provided with an adaptive arc-shaped concave surface. The curvature of the concave surface matches the outer arc of the pressing step at the bottom of the porcelain bottle, so that the pressure plate and the porcelain bottle change from traditional line contact to surface contact, increasing the contact area while forming a radial limiting structure.

[0031] Specifically, a stepped ring 15 is provided around the outer periphery of the porcelain bottle mounting hole, a sealing groove 16 is provided on the stepped ring 15, and a sealing ring 17 is provided inside the sealing groove 16.

[0032] In this embodiment, the stepped ring on the outer periphery of the porcelain bottle mounting hole provides an axial support surface for the bottom of the porcelain bottle, enabling rapid axial positioning of the porcelain bottle; the sealing groove on the stepped ring is embedded with a sealing ring, and when the bottom of the porcelain bottle is pressed against the stepped ring, the sealing ring is compressed and undergoes elastic deformation, filling the micro gap between the porcelain bottle and the stepped ring, forming a radial sealing barrier.

[0033] Specifically, the contact surface between the pressure plate and the porcelain bottle pressing step is provided with an elastic buffer layer, which is made of vulcanized rubber or silicone and has a thickness of 2–5 mm.

[0034] In this embodiment, a 2-5mm thick vulcanized rubber or silicone elastic buffer layer is provided on the contact surface between the pressure plate and the porcelain bottle. The deformation characteristics of the elastic material are used to absorb the clamping impact force during assembly and the vibration energy during equipment operation, while filling the rough texture and small gaps of the contact surface.

[0035] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A porcelain insulator mounting structure for an oil-immersed transformer, comprising a transformer casing and porcelain insulators, wherein a plurality of porcelain insulator mounting holes are spaced apart on the top wall of the transformer casing, characterized in that: The porcelain insulator mounting hole is surrounded by several porcelain insulator mounting components at intervals. Each porcelain insulator mounting component includes a stud provided on the top wall of the transformer housing, an adjusting plate fitted on the stud, a locking nut threaded with the stud, and a pressure plate connected to the adjusting plate. One end of the adjusting plate is provided with a telescopic groove that cooperates with the extension and retraction of the pressure plate, and telescopic holes are provided on both sides of the bottom wall of the telescopic groove; One end of the pressure plate is provided with a screw that expands and contracts with the telescopic hole, and the other end of the pressure plate can press against the pressing step at the bottom of the porcelain bottle. An adjusting nut is screwed onto the screw.

2. The porcelain insulator mounting structure for an oil-immersed transformer according to claim 1, characterized in that: The stud is integrally formed with the top wall of the transformer casing.

3. The porcelain insulator mounting structure for an oil-immersed transformer according to claim 1, characterized in that: The porcelain bottle mounting components consist of three parts, which are evenly spaced around the outer periphery of the porcelain bottle mounting holes.

4. The porcelain insulator mounting structure for an oil-immersed transformer according to claim 1, characterized in that: The pressure plate is provided with a matching arc-shaped concave surface at one end of the pressing step.

5. The porcelain insulator mounting structure for an oil-immersed transformer according to claim 1, characterized in that: A stepped ring is provided around the outer periphery of the mounting hole of the porcelain bottle, a sealing groove is provided on the stepped ring, and a sealing ring is provided inside the sealing groove.

6. The porcelain insulator mounting structure for an oil-immersed transformer according to claim 1, characterized in that: The contact surface between the pressure plate and the porcelain bottle pressing step is provided with an elastic buffer layer, which is made of vulcanized rubber or silicone and has a thickness of 2–5 mm.

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