Shockproof device applied to large oil immersed transformer

Abstract

The invention discloses an anti-vibration device applied to a large oil immersed transformer, a wheel support is arranged at the bottom of the oil immersed transformer, a wheel is arranged in the wheel support, the wheel is arranged on a rail, the anti-vibration device comprises a device body, the device body comprises an inner side clamping component and an outer side clamping component, and the outer side clamping component is arranged on the device body; the upper portions of the inner side clamping component and the outer side clamping component are used for being attached to the two sides of a wheel support, and the lower portions of the inner side clamping component and the outer side clamping component are used for being connected with the two sides of a rail in a clamped mode. And the two ends of the connecting part are detachably connected with the inner side clamping part and the outer side clamping part correspondingly, and the connecting part is arranged to clamp and fix the wheel support and the rail by adjusting the distance between the inner side clamping part and the outer side clamping part. According to the anti-vibration device, the mechanical clamping principle is adopted, vibration transmission can be effectively reduced, maintainability and reusability are improved, and dynamic adjustment is achieved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of vibration protection for large oil-immersed transformers. More specifically, the present invention relates to a vibration protection device for large oil-immersed transformers. Background Art

[0002] In traditional large oil-immersed transformer seismic protection technology, to mitigate the impact of earthquakes and other vibrations on the transformer, a welded seismic isolation plate is typically used to connect the transformer to the concrete foundation. The specific technical solution is as follows: Precisely measure and mark the surface of the transformer foundation to determine the installation position of the seismic isolation plate. The plate is then placed at the corresponding position on the foundation and initially adjusted to ensure its levelness and positional accuracy. Multiple seismic isolation plates are welded to the bottom of the transformer. The shape of the plates matches the base of the transformer, and the other end of the plates is welded directly to the anchor steel plate embedded in the concrete foundation. During the welding process, strict control of welding parameters is required to ensure welding quality and a strong connection between the seismic isolation plate, the bottom of the transformer, and the foundation.

[0003] However, existing earthquake-proof structures often suffer from the following drawbacks in practical applications: 1) High welding process requirements: The welding process requires specialized welding techniques and equipment, placing high demands on the welder's skill level. Poor welding quality can lead to weld cracking and cold welds, compromising the securement of the earthquake-proof plate and reducing its earthquake-proof performance. 2) Irreversibility: Welding is an irreversible connection method. Once completed, the earthquake-proof plate forms a permanent connection to the transformer base and concrete foundation. The weld position is fixed and cannot be dynamically adjusted to accommodate foundation settlement or minor equipment displacement. If the transformer needs maintenance, replacement, or repositioning later, removing the earthquake-proof plate is difficult and may even damage the transformer's base structure and foundation. 3) Material performance limitations: Under extreme vibration conditions, performance cannot meet requirements. Welding provides a rigid connection, directly transmitting mechanical vibrations and short-circuit electromotive force during transformer operation to the concrete foundation. This lacks a buffering mechanism, which can easily cause significant shock to the transformer. 4) High cost: The material cost of the earthquake-proof plate is relatively high, and welding also requires significant labor and equipment costs. Furthermore, to ensure welding quality, additional work such as weld inspection may be required, further increasing costs. 5) Resonance risk: When the vibration frequency is close to the foundation's natural frequency, resonance can easily occur, leading to weld cracking or damage to the foundation structure. Summary of the Invention

[0004] In order to solve one or more of the above-mentioned technical problems, the present invention provides a vibration-proof device for a large oil-immersed transformer.

[0005] The present invention provides a vibration isolation device for a large oil-immersed transformer. A wheel bracket is provided at the bottom of the oil-immersed transformer, and a wheel is provided within the wheel bracket. The wheel is then mounted on a rail. The vibration isolation device comprises: a device body, comprising an inner clamping member and an outer clamping member, wherein the upper portions of the inner clamping member and the outer clamping member are adapted to be disposed in contact with the sides of the wheel bracket, and the lower portions of the inner clamping member and the outer clamping member are adapted to engage with the sides of the rail; and a connecting member, wherein the ends of the inner clamping member and the outer clamping member are detachably connected to the inner clamping member and the outer clamping member, respectively, and the connecting member is configured to clamp and secure the wheel bracket and the rail by adjusting the distance between the inner clamping member and the outer clamping member.

[0006] In some embodiments, the inner clamping part and the outer clamping part are constructed as plate-like structures, and the bottoms of the inner clamping part and the outer clamping part are relatively formed with clamping structures, and a clamping opening matching the shape of the rail is formed between the two clamping structures, and the clamping structure and the clamping opening are used to fit the surface of the rail.

[0007] In some embodiments, the clamping structures are symmetrically disposed on both sides of the bottom of the inner clamping member and the outer clamping member.

[0008] In some embodiments, the connecting part includes a plurality of connecting bolts and nuts, and the inner clamping part and the outer clamping part are correspondingly formed with connecting holes, the two ends of the connecting bolts pass through the connecting holes, and the nuts are connected and fixed to the two ends of the connecting bolts, wherein the connecting holes are laterally symmetrically arranged on both sides of the inner clamping part and the outer clamping part.

[0009] In some embodiments, a through hole structure is formed on the inner clamping component and / or the outer clamping component, and the shape of the through hole structure is adapted to the outer contour shape of the shaft portion of the wheel bracket and / or the obstacle protrusion thereon.

[0010] In some embodiments, the bottoms of the inner clamping member and the outer clamping member are further formed with notches.

[0011] In some embodiments, both ends of the top edge of the plate-like structure are formed with downwardly inclined chamfered edges.

[0012] In some embodiments, the material of the inner clamping member and the outer clamping member is steel or iron.

[0013] In some embodiments, several device bodies are included.

[0014] In some embodiments, the device further comprises a paint layer, which is applied to the surface of the device body and the connecting components, and the color of the paint layer is the same as that of the transformer.

[0015] The shockproof device provided above has the following advantages: 1) The shockproof device according to the present invention is not rigidly connected, but fixed by clamping, that is, it adopts the mechanical clamping principle, which can effectively reduce vibration transmission; 2) The shockproof device according to the present invention is constructed as a detachable connection method, and adopts connecting parts instead of welding to improve maintainability and reusability; 3) When the shockproof device of the present invention is absorbing shock, the longitudinal compensation space and horizontal displacement compensation capacity formed between the inner clamping part and the outer clamping part can be dynamically adjusted to adapt to foundation deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an illustrative and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0017] Figure 1 This is an exemplary application scenario of the anti-vibration device according to an embodiment of the present invention, which shows the connection between the anti-vibration device and a transformer;

[0018] Figure 2 A schematic structural diagram of a shockproof device according to an embodiment of the present invention is shown;

[0019] Figure 3 for Figure 2 The side structural diagram of the shockproof device shown. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are part of the embodiments of the present disclosure, not all of them. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0021] Figure 1 The figure shows the connection between the anti-vibration device 100 and the transformer 200 according to the embodiment of the present invention. Figure 2 FIG. 1 shows the structure of the anti-vibration device 100 according to an embodiment of the present invention. Figure 1 and Figure 2As shown, a wheel bracket 201 is provided at the bottom of an oil-immersed transformer 200. A wheel 202 is provided inside the wheel bracket 201. The wheel 202 is mounted on a rail 203. The anti-vibration device 100 comprises: a device body 1, which includes an inner clamping component 11 and an outer clamping component 12. The upper portions of the inner clamping component 11 and the outer clamping component 12 are configured to fit against the sides of the wheel bracket 201, while the lower portions of the inner clamping component 11 and the outer clamping component 12 are configured to engage with the sides of the rail 203; and a connecting component 2, whose ends are detachably connected to the inner clamping component 11 and the outer clamping component 12, respectively. The connecting component 2 is configured to clamp and secure the wheel bracket 201 and the rail 203 by adjusting the distance between the inner clamping component 11 and the outer clamping component 12.

[0022] During use of the anti-vibration device 100 according to an embodiment of the present invention, the wheel 202 on the wheel bracket 201 of the transformer 200 is positioned on a rail 203. The upper portions of the inner and outer clamping components 11, 12 are attached to the bracket of the wheel 202 and fixed thereto, while the lower portions of the inner and outer clamping components 11, 12 are clamped and fixed to the sides of the rail 203. After the inner and outer clamping components 11, 12 are secured using the connecting components 2, they form a mechanically clamped fit with the wheel bracket 201 and the rail 203.

[0023] Through the above configuration, the anti-vibration device 100 according to the embodiment of the present invention has the following advantages:

[0024] 1) When the transformer 200 is operating, magnetostriction of the core, electromagnetic forces generated by coil current, and the cooler all induce internal mechanical vibrations. The vibration-isolating device 100 of this embodiment of the present invention utilizes mechanical clamping between the inner and outer clamping components 11, 12 to create a vibration compensation space. When the vibration intensity is less than the frictional force of the mechanical clamping, the vibration is transmitted to the inner and outer clamping components 11, 12, dissipating the vibration energy. When the vibration intensity is greater than the frictional force of the mechanical clamping, the vibration is retained within the vibration compensation space, allowing the vibration-isolating device 100 to continue absorbing the vibration energy. This effectively reduces the vibration amplitude transmitted to the transformer 200 casing and mounting foundation, protecting internal components and minimizing damage to the equipment caused by mechanical vibration. For example, severe vibration can damage the weld seals of the transformer 200 oil tank, leading to insulating oil leakage, fire, or insulation failure. Electrical connection components 2, such as high-voltage bushings and tap changers, can easily loosen under vibration, resulting in poor contact or discharge failure. Vibration can also amplify the operating noise of the transformer 200. Long-term vibration can cause fatigue in metal materials (such as core clamps and brackets). The anti-vibration device 100 of the present invention can effectively reduce the mechanical stress on electrical connection components 2, such as the oil tank and pipelines, high-voltage bushings, and tap changers, by buffering and suppressing vibration amplitude. This maintains sealing performance, avoids oil leaks, and extends the service life of the equipment.

[0025] 2) If the natural frequency of transformer 200 approaches an external vibration frequency (such as that caused by nearby equipment operation or traffic), resonance can easily occur, causing a sharp increase in amplitude. In severe cases, this can lead to structural deformation or even damage. By using mechanical clamping instead of a rigid connection, the anti-vibration device 100 according to an embodiment of the present invention can buffer the overall vibration frequency of transformer 200, effectively preventing resonance with the external environment.

[0026] 3) Large oil-immersed transformers 200 are typically fixed to the ground. Lateral shear forces and longitudinal shock waves during earthquakes can be directly transmitted to the equipment, causing displacement, toppling, or fracture of internal components. The seismic isolation device 100 according to an embodiment of the present invention, by providing inner and outer clamping members 11 and 12 to limit the lateral position of the transformer 200, absorbs lateral shear forces during an earthquake through the flexible deformation of the inner and outer clamping members 11 and 12, reducing the direct impact of earthquake waves on the transformer 200 and preventing the equipment from overturning or excessive displacement.

[0027] 4) The anti-vibration device 100 of the embodiment of the present invention can adapt to rails 203 and transformers 200 of different specifications. It only needs to change the dimensions of the inner clamping component 11, the outer clamping component 12 and the connecting component 2 according to specific needs. It has a certain degree of versatility and strong adaptability, and reduces the fixation problems caused by differences in equipment specifications.

[0028] 5) The anti-vibration device 100 according to the embodiment of the present invention has a relatively simple structure, and is relatively convenient for routine maintenance and overhaul, thereby reducing maintenance costs and workload.

[0029] In summary, the connection between the shockproof device 100 and the transformer 200 according to the embodiment of the present invention is not a rigid connection, but is fixed by clamping, that is, the mechanical clamping principle is adopted, which can effectively reduce the transmission of vibration. The shockproof device 100 according to the embodiment of the present invention is constructed in a detachable connection mode, and the connecting component 2 is used instead of welding to improve maintainability and reusability. When the shockproof device 100 according to the embodiment of the present invention is absorbing shock, the longitudinal compensation space and horizontal displacement compensation capacity formed between the inner clamping component 11 and the outer clamping component 12 can be dynamically adjusted to adapt to foundation deformation.

[0030] Please refer to Figure 2 In some embodiments, the inner clamping part 11 and the outer clamping part 12 can be constructed as a plate-like structure, and a clamping structure 14 is formed at the bottom of the inner clamping part 11 and the outer clamping part 12 relative to each other, and a clamping opening that matches the shape of the rail 203 is formed between the two clamping structures 14, and the clamping structure 14 and the clamping opening are used to fit the surface of the rail 203.

[0031] In the present application, the clamping structure 14 is constructed as a wedge-shaped structure, the short side of the wedge-shaped structure is used to be inserted into the rail 203, and a clamping opening 141 is formed between the two wedge-shaped structures, so that the clamping structure 14 can form a snap fit with the rail 203. Through this arrangement, a clamping opening 141 that matches the shape of the rail 203 is formed between the two clamping structures 14, which can closely fit the surface of the rail 203 and maintain a stable connection.

[0032] In some embodiments, the clamping structures 14 are symmetrically disposed on both sides of the bottom of the inner clamping member 11 and the outer clamping member 12 .

[0033] Through this arrangement, two clamping structures 14 are provided on the inner clamping part 11 and the outer clamping part 12. It can be understood that the clamping structures 14 of the inner clamping part 11 and the outer clamping part 12 are arranged in a one-to-one correspondence so as to provide a more stable clamping effect when clamping the rail 203.

[0034] Please refer to Figure 2 In some embodiments, both the inner clamping component 11 and the outer clamping component 12 are used to form a rough surface on the contact surface with the wheel bracket 201 to increase the surface roughness of the contact surface, so that the inner clamping component 11, the outer clamping component 12 and the wheel bracket 201 are more firmly clamped.

[0035] Please return Figure 2In some embodiments, the connecting component 2 may include a plurality of connecting bolts and nuts, and the inner clamping component 11 and the outer clamping component 12 are correspondingly formed with connecting holes, the two ends of the connecting bolt pass through the connecting holes, and the nuts are connected and fixed to the two ends of the connecting bolt, wherein the connecting holes are laterally symmetrically arranged on both sides of the inner clamping component 11 and the outer clamping component 12.

[0036] In the present application, the connecting bolts can be high-strength, large-sized bolts. In the present application, the connection between the inner clamping member 11 and the outer clamping member 12 via the connecting bolts can provide a strong clamping force, and transmit the clamping force to the clamp structure 14, thereby achieving a firm clamping between the wheels 202 and the rails 203.

[0037] Please refer to Figure 3 In some embodiments, a through hole structure 13 may be formed on the inner clamping part 11 and / or the outer clamping part 12, and the shape of the through hole structure 13 is adapted to the outer contour shape formed by the shaft of the wheel bracket 201 and / or the obstacle protrusion thereon.

[0038] Through the above arrangement, the through hole structure 13 is used to avoid the axis of the wheel bracket 201 and the obstacle protrusions thereon, so that the inner clamping part 11 and the outer clamping part 12 can form a better fitting effect with the two sides of the wheel bracket 201, thereby improving the stability of the clamping fit.

[0039] Please refer to Figure 3 In some embodiments, a notch groove 15 may be formed at the bottom of the inner clamping part 11 and the outer clamping part 12 to reduce the overall weight of the inner clamping part 11 and the outer clamping part 12 and facilitate installation by production personnel.

[0040] Please continue to refer to Figure 3 In some embodiments, downwardly inclined chamfered edges 16 may be formed at both ends of the top edge of the plate-like structure. This configuration optimizes the stress distribution at the edge of the plate-like structure, thereby effectively reducing stress concentration and improving the fatigue resistance and service life of the inner and outer clamping members 11 and 12.

[0041] In some embodiments, the material of the inner clamping member 11 and the outer clamping member 12 can be steel or iron. Steel is preferably used. Through this arrangement, steel or iron has higher strength and hardness and can withstand larger loads and stresses.

[0042] In some embodiments, the anti-vibration device 100 may include multiple device bodies 1, so that the anti-vibration device 100 of the present invention can be configured as a single-axis track clamping device or a dual-axis track clamping device. Specifically, when a single wheel 202 is installed in the wheel bracket 201, a single-axis track clamping device is used. When two wheels 202 are installed in the wheel bracket 201, a dual-axis track clamping device is used.

[0043] In some embodiments, the anti-vibration device 100 further includes a paint layer, which is applied to the surface of the device body 1 and the connecting component 2 , and the color of the paint layer is the same as that of the transformer 200 .

[0044] In the present application, the color of the paint layer is preferably the same as that of the transformer 200. By providing the paint layer, on the one hand, the paint layer can prevent rust and corrosion of the anti-vibration device 100 according to the embodiment of the present invention; on the other hand, the same color also makes the appearance of the anti-vibration device 100 according to the embodiment of the present invention and the transformer 200 more unified, and the appearance of the anti-vibration device 100 during use is better.

[0045] In the above description of this application, unless otherwise expressly specified or limited, terms such as "fixed," "mounted," "connected," or "connected" should be understood in a broad sense. For example, with respect to the term "connected," it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two elements or an interaction between two elements. Therefore, unless otherwise expressly specified in this application, those skilled in the art can understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0046] According to the above description of the present application, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of the present application, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0047] In addition, the terms "first" or "second" used in this application to refer to numbers or ordinal numbers are used for descriptive purposes only and should not be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0048] Although a number of embodiments of the present invention have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art may devise numerous modifications, variations, and alternatives without departing from the concept and spirit of the present invention. It should be understood that in practicing the present invention, various alternatives to the embodiments of the present invention described herein may be employed. The appended claims are intended to define the scope of the present invention and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A shockproof device for a large oil-immersed transformer, wherein a wheel bracket is provided at the bottom of the oil-immersed transformer, a wheel is provided in the wheel bracket, and the wheel is provided on a rail, wherein the wheel is provided on a rail, include: a device body comprising an inner clamping member and an outer clamping member, wherein the upper portions of the inner clamping member and the outer clamping member are adapted to be fitted with both sides of the wheel bracket, and the lower portions of the inner clamping member and the outer clamping member are adapted to be engaged with both sides of the rail; and A connecting component, both ends of which are detachably connected to the inner clamping component and the outer clamping component, respectively. The connecting component is configured to clamp and fix the wheel bracket and the rail by adjusting the distance between the inner clamping component and the outer clamping component.

2. The anti-vibration device according to claim 1, characterized in that The inner clamping part and the outer clamping part are constructed as plate-like structures, and the bottoms of the inner clamping part and the outer clamping part are relatively formed with clamping structures, and a clamping opening matching the shape of the rail is formed between the two clamping structures. The clamping structure and the clamping opening are used to fit the surface of the rail.

3. The anti-vibration device according to claim 2, characterized in that: The clamping structures are symmetrically arranged on both sides of the bottom of the inner clamping component and the outer clamping component.

4. The anti-vibration device according to any one of claims 1 to 3, characterized in that: The connecting component includes a plurality of connecting bolts and nuts, and the inner clamping component and the outer clamping component are correspondingly formed with connecting holes, both ends of the connecting bolt pass through the connecting holes, and the nuts are connected and fixed to the two ends of the connecting bolts, wherein the connecting holes are laterally symmetrically arranged on both sides of the inner clamping component and the outer clamping component.

5. The anti-vibration device according to any one of claims 1 to 3, characterized in that: A through hole structure is formed on the inner clamping component and / or the outer clamping component, and the shape of the through hole structure is adapted to the outer contour shape formed by the shaft portion of the wheel bracket and / or the obstacle protrusion thereon.

6. The anti-vibration device according to any one of claims 1 to 3, characterized in that: The bottoms of the inner clamping component and the outer clamping component are further formed with notch grooves.

7. The anti-vibration device according to claim 2, characterized in that: Both ends of the top edge of the plate-like structure are formed with downwardly inclined chamfered edges.

8. The anti-vibration device according to any one of claims 1 to 3, characterized in that: The inner clamping member and the outer clamping member are made of steel or iron.

9. The anti-vibration device according to any one of claims 1 to 3, characterized in that: It comprises several device bodies.

10. The anti-vibration device according to any one of claims 1 to 3, characterized in that: It also includes a paint layer, which is applied to the surface of the device body and the connecting component, and the color of the paint layer is the same as that of the transformer.

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