An external shock absorbing device for a transformer valve side bushing

Abstract

The utility model discloses an external type damping device of transformer valve side bushing, including setting energy dissipation subassembly in transformer box body one side and with valve side bushing connection, energy dissipation subassembly bottom is equipped with support piece, support piece is fixed at the lower edge department of valve side bushing, energy dissipation subassembly is connected with valve side bushing through the ring that sets up on valve side bushing, energy dissipation subassembly is connected with ring through connecting rod, the utility model discloses through installing specific shock attenuation and energy dissipation mechanism outside valve side bushing, reduces the vibration influence through additional energy dissipation mechanism under the action of earthquake, and reduces the amplitude of bushing in the earthquake, reduces porcelain bushing fracture, oil leakage etc. Failure possibility, improves transformer overall anti -seismic performance.

Description

Technical Field

[0001] This utility model belongs to the field of earthquake prevention and disaster reduction technology in power engineering, and in particular relates to an external shock absorption device for transformer valve side bushing. Background Technology

[0002] Transformers are core equipment in power systems, and their safety and stability directly affect the reliable operation of the power grid. In high-voltage and ultra-high-voltage power grids, transformer valve-side bushings are key components connecting transformers to high-voltage transmission lines, bearing the combined effects of high voltage, mechanical loads, and environmental factors.

[0003] Especially under extreme conditions such as earthquakes, the valve-side bushing, due to its large height, high center of gravity, and strong rigidity, becomes the most vulnerable part of the transformer structure. Under earthquake action, the valve-side bushing may face the following main problems: First, the seismic waves may induce resonance in the bushing, significantly increasing the vibration amplitude and causing mechanical damage. In addition, severe vibration may cause porcelain bushing fracture, loose flange connection, and damage to internal oil insulation, which may lead to failure of electrical equipment in severe cases. Furthermore, the rigid connection between the transformer body and the bushing may transfer seismic energy to the inside of the transformer, affecting the overall seismic resistance of the equipment.

[0004] The following methods are currently mainly used for seismic design of transformers and their bushings:

[0005] (1) Optimize the support structure: By increasing the stiffness of the support and adding seismic fixing devices, the stability of the transformer and bushing can be improved. However, excessive stiffness may lead to the concentration of seismic impact energy, which may exacerbate the risk of damage.

[0006] (2) Use of composite materials: Some studies have proposed using flexible or high-damping materials to replace traditional ceramic sleeves in order to reduce the rigid impact under seismic action, but due to the high cost and limited engineering application, they have not been widely promoted.

[0007] (3) Internal damping design: Adding damping material or optimizing the oil-paper insulation structure inside the bushing can improve energy dissipation capacity. However, due to the size and material properties of the bushing, the vibration reduction effect of this method is limited.

[0008] Overall, existing seismic resistance measures have improved the seismic performance of transformers to some extent. However, traditional rigid fixing methods may lead to excessive concentration of impact forces, failing to effectively dissipate seismic energy. Furthermore, existing seismic resistance methods are mostly focused on the overall transformer structure, while research on external vibration damping and energy dissipation devices for valve-side bushings is limited, making it difficult to effectively mitigate the impact of local vibrations. In addition, the randomness and complexity of seismic loads mean that transformer bushings still face a significant risk of failure under actual seismic conditions. Utility Model Content

[0009] The purpose of this utility model is to overcome the defects of the prior art and provide an external shock absorption device for the valve side bushing of a transformer. By installing a specific shock absorption and energy dissipation mechanism on the outside of the valve side bushing, the impact of vibration is reduced under earthquake action through an additional energy dissipation mechanism, and the amplitude of bushing vibration during earthquakes is reduced, thereby reducing the possibility of failures such as porcelain bushing breakage and oil leakage, and improving the overall seismic performance of the transformer.

[0010] The objective of this utility model is achieved through the following technical solution:

[0011] An external vibration damping device for a transformer valve-side bushing includes an energy-dissipating component disposed on one side of the transformer housing and connected to the valve-side bushing. A support member is installed at the bottom of the energy-dissipating component and the support member is fixed at the lower edge of the valve-side bushing.

[0012] In this embodiment, an external energy-dissipating component is connected to the valve-side sleeve, and the impact of vibration is reduced through an additional energy-dissipating mechanism under earthquake action, thus protecting it.

[0013] In one embodiment, the energy-consuming component is connected to the valve-side sleeve via a collar fitted on the valve-side sleeve.

[0014] In one embodiment, the energy-consuming component is connected to the collar via a connecting rod.

[0015] In one embodiment, the energy-dissipating component includes an upper base plate connected to the connecting rod and a lower base plate connected to the support member, with the energy-dissipating component disposed between the upper base plate and the lower base plate.

[0016] In one embodiment, the energy-consuming component includes a vertical metal spring connected to the lower base plate, the other end of the vertical metal spring being connected to a slider that contacts the upper base plate, the upper base plate having baffles extending toward the lower base plate at both ends, and a horizontal metal spring being provided between the slider and the baffles on both sides of the upper base plate.

[0017] In one embodiment, the contact surface between the slider and the upper base plate is further coated with an energy-dissipating coating.

[0018] In one embodiment, a rubber sleeve is also provided on the outer edge between the upper base plate and the lower base plate.

[0019] In one embodiment, the support is fixed to the lower edge of the valve-side sleeve by expansion bolts.

[0020] In one embodiment, both the support member and the connecting rod are made of carbon fiber composite material.

[0021] The beneficial effects of this utility model are as follows:

[0022] By installing a shock-absorbing device on the outside of the valve-side bushing, the impact of vibration is reduced under seismic action through an additional energy dissipation mechanism, and the amplitude of bushing vibration during earthquakes is reduced, thereby reducing the possibility of failures such as porcelain bushing breakage and oil leakage, improving the overall seismic performance of the transformer. It does not require changes to the internal structure of the bushing, is flexible in installation, can be adapted to different models of transformer bushings, facilitates installation, maintenance and replacement, and reduces long-term operating costs. Attached Figure Description

[0023] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings. Wherein:

[0024] Figure 1 A schematic diagram (side view) of the structure of this utility model is shown.

[0025] Figure 2 This shows a schematic diagram (front view) of the structure of this utility model;

[0026] Figure 3 A schematic diagram of the energy-consuming component of this utility model is shown;

[0027] Figure 4 A schematic diagram (sectional view) of the structure of the energy-consuming component of this utility model is shown.

[0028] Figure 5 This diagram shows the detailed structure of the friction energy dissipation between the slider and the upper base plate of this utility model.

[0029] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0030] Figure label:

[0031] 1-Transformer housing, 2-Valve side bushing, 3-Energy dissipation component, 4-Connecting rod, 5-Collar ring, 6-Upper base plate, 7-Lower base plate, 8-Vertical metal spring, 9-Horizontal metal spring, 10-Slider, 11-Baffle, 12-Rubber jacket, 13-Energy dissipation coating, 14-Support component. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] This utility model provides an external shock absorption device for the transformer valve-side bushing 2, such as... Figure 1 and Figure 2 As shown, it includes an energy-consuming component 3 disposed on one side of the transformer housing 1 and connected to the valve-side bushing 2. A support 14 is installed at the bottom of the energy-consuming component 3 and the support 14 is fixed at the lower edge of the valve-side bushing 2.

[0034] Specifically, the energy-consuming component 3 is connected to the valve-side sleeve 2 through a collar 5 sleeved on the valve-side sleeve 2, the energy-consuming component 3 is connected to the collar 5 through a connecting rod 4, and the support 14 is fixed to the lower edge of the valve-side sleeve 2 by expansion bolts to ensure its stability.

[0035] It should be noted that by installing a shock-absorbing device on the outside of the valve-side bushing 2, the impact of vibration is reduced under earthquake action through an additional energy dissipation mechanism, and the amplitude of bushing vibration during earthquakes is reduced, thereby reducing the possibility of failures such as porcelain bushing breakage and oil leakage, and improving the overall seismic performance of the transformer.

[0036] In one embodiment, such as Figure 3 As shown, the energy-consuming component 3 includes an upper base plate 6 connected to the connecting rod 4 and a lower base plate 7 connected to the support member 14. The energy-consuming component 3 is disposed between the upper base plate 6 and the lower base plate 7.

[0037] Furthermore, such as Figure 4 As shown, the energy-consuming component 3 includes a vertical metal spring 8 connected to the lower base plate 7. The other end of the vertical metal spring 8 is connected to a slider 10 that contacts the upper base plate 6. The upper base plate 6 has baffles 11 extending toward the lower base plate 7 at both ends. A horizontal metal spring 9 is also provided between the slider 10 and the baffles 11 on both sides of the upper base plate 6.

[0038] It should be noted that metal springs are used for constraint and support, which deform and dissipate energy under earthquake action, thereby improving the durability and energy dissipation capacity of the device. The horizontal metal springs mainly dissipate energy in the horizontal direction of the valve side bushing 2 through deformation, while the vertical metal springs 8 mainly dissipate energy in the vertical direction of the valve side bushing 2 through deformation, thereby reducing the impact of earthquakes on the transformer and the valve side bushing 2.

[0039] Specifically, the two ends of the vertical metal spring 8 are fixedly connected to the slider 10 and the lower base plate 7 respectively, and the two horizontal metal springs 9 are fixedly connected to the two ends of the slider 10 respectively. In this way, metal springs are arranged in all four directions of the slider 10 so that the slider 10 can play an energy-dissipating and shock-absorbing role in all four directions.

[0040] Furthermore, such as Figure 5 As shown, the contact surface between the slider 10 and the upper base plate 6 is also coated with an energy-dissipating coating 13;

[0041] Specifically, the energy-consuming coating 13 can be a rubber coating or a sandpaper-like coating, etc.

[0042] In one embodiment, such as Figure 3 As shown, a rubber jacket 12 is also provided on the outer edge between the upper base plate 6 and the lower base plate 7, which fully covers the energy-consuming component 3, making the external shock-absorbing energy-consuming device weather-resistant and suitable for various operating environments, including high humidity and high salt spray areas.

[0043] It should be noted that when an earthquake occurs, ground motion is transmitted to the transformer body through the transformer foundation, further affecting the vibration response of the valve-side bushing 2. Because the valve-side bushing 2 is relatively high and stiff, its top is prone to significant vibration amplitude during earthquakes. This device connects to the transformer body and bushing via an external support 14, guiding vibration energy into the energy dissipation device without affecting the original structure. To reduce the impact of vibration on the valve-side bushing 2, the device employs multiple energy dissipation methods, including external rubber energy dissipation, friction energy dissipation, and metal spring energy dissipation. A rubber jacket 12 is installed outside the external vibration damping and energy dissipation device. When relative motion occurs due to earthquake action, the rubber jacket 12 converts vibration energy into heat energy through viscous shear action, thereby dissipating some of the earthquake energy. This mechanism can effectively reduce high-frequency vibrations. The system employs various methods to reduce the peak stress on the bushing. For example, frictional sliding energy dissipation utilizes a controllable friction device (adjustable friction plate and sliding contact surface). Slippage at the friction interface converts some seismic energy into frictional heat dissipation. This method reduces the impact of low-frequency, high-amplitude vibrations and adapts to different operating conditions by adjusting the friction coefficient. Metal spring energy dissipation involves adding horizontal and vertical metal springs inside the external vibration damping and energy dissipation device. When an earthquake causes significant deformation, the metal springs undergo plastic deformation and consume a large amount of energy. The horizontal metal spring primarily dissipates energy in the horizontal direction of the valve-side bushing 2 through deformation, while the vertical metal spring 8 primarily dissipates energy in the vertical direction of the valve-side bushing 2 through deformation. This reduces the impact of earthquakes on the transformer and valve-side bushing 2, improving the system's energy dissipation capacity and ensuring long-term stability.

[0044] In the description of this utility model, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] While specific embodiments of the present invention have been described herein with reference to them, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that different dependent claims and features herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other embodiments.

[0046] In the description of this utility model, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] While specific embodiments of the present invention have been described herein with reference to them, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that different dependent claims and features herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other embodiments.

Claims

1. An external vibration damping device for a transformer valve-side bushing, characterized in that, It includes an energy-consuming component installed on one side of the transformer housing and connected to the valve-side bushing. The energy-consuming component has a support installed at its bottom, and the support is fixed to the lower edge of the valve-side bushing.

2. The external vibration damping device for a transformer valve-side bushing according to claim 1, characterized in that, The energy-consuming component is connected to the valve-side sleeve via a collar fitted on the valve-side sleeve.

3. The external vibration damping device for a transformer valve-side bushing according to claim 2, characterized in that, The energy-consuming component is connected to the collar via a connecting rod.

4. The external vibration damping device for a transformer valve-side bushing according to claim 3, characterized in that, The energy-dissipating component includes an upper base plate connected to the connecting rod and a lower base plate connected to the support member, with the energy-dissipating component disposed between the upper base plate and the lower base plate.

5. An external vibration damping device for a transformer valve-side bushing according to claim 4, characterized in that, The energy-consuming component includes a vertical metal spring connected to the lower base plate, and a slider that contacts the upper base plate at the other end of the vertical metal spring. The upper base plate has baffles at both ends that extend toward the lower base plate. A horizontal metal spring is also provided between the slider and the baffles on both sides of the upper base plate.

6. The external vibration damping device for a transformer valve-side bushing according to claim 5, characterized in that, The contact surface between the slider and the upper base plate is also coated with an energy-dissipating coating.

7. An external vibration damping device for a transformer valve-side bushing according to claim 4, characterized in that, A rubber sleeve is also fitted around the outer edge between the upper base plate and the lower base plate.

8. The external vibration damping device for a transformer valve-side bushing according to claim 1, characterized in that, The support is fixed to the lower edge of the valve-side sleeve by expansion bolts.

9. An external vibration damping device for a transformer valve-side bushing according to claim 3, characterized in that, Both the support member and the connecting rod are made of carbon fiber composite material.

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