A seismic isolation device

Abstract

The application provides an isolation device, which comprises a first connecting plate, at least three supporting members, a mounting core and a second connecting plate; the first connecting plate and the second connecting plate are horizontally arranged, the mounting core is vertically arranged between the first connecting plate and the second connecting plate and located at a central position; the supporting members are vertically arranged around the mounting core between the first connecting plate and the second connecting plate, and the lower end surface of the supporting members has a first geometric structure; a second geometric structure matched with the first geometric structure is arranged at the connecting position between the upper surface of the second connecting plate and the lower end surface of the supporting members, so that the isolation capacity is improved and the service life is long; the technical scheme provided by the application has the advantages of simple structure, convenient installation, low cost, favorable maintenance of electrical equipment and strong engineering application feasibility; the supporting members of the application are made of carbon steel or alloy steel, and the mounting core is made of lead metal, so that the supporting members can be reset to the initial state by the action of self weight without affecting the normal operation of the electrical equipment.

Description

Technical Field

[0001] This invention relates to the field of power grid disaster prevention and mitigation technology, specifically to a seismic isolation device. Background Technology

[0002] Earthquakes severely damage electrical equipment such as transformers and high-voltage reactors, causing significant disruption to the power system, resulting in substantial economic losses and severely impacting post-disaster reconstruction efforts in earthquake-stricken areas. Transformers and high-voltage reactors are the main electrical equipment in substations. Under earthquake conditions, the primary forms of damage are the toppling and displacement of the transformers and reactors themselves, or the breakage and misalignment of high-voltage bushings. With increased attention to earthquake disasters, reinforcement measures have been implemented for the connection between power transformers and high-voltage reactors and their foundations in earthquake-prone areas, mitigating some damage to the equipment itself. However, the porcelain bushings on the equipment can still suffer severe damage under strong earthquakes. In ultra-high-voltage substations, transformers and reactors, due to their larger mass and higher center of gravity, experience a more pronounced amplification of the dynamic load on the bushings. For heavy electrical equipment like transformers and reactors, seismic isolation technology is an effective way to reduce their seismic response. Current seismic isolation technology mainly uses multiple isolation devices to form an isolation layer, suitable for situations with small static displacements but short-lived and large dynamic displacements. It is primarily used to isolate high-frequency vibrations, but a drawback is that the rubber will age and creep.

[0003] When the operating temperature is below -30℃, the elasticity of the rubber used in the seismic isolation device decreases significantly, making it unsuitable for use in extremely cold conditions. Furthermore, rubber is not heat-resistant, and the operating temperature should not exceed 70℃. The creep effect of rubber means that although the seismic isolation bearing will partially return to its initial state after displacement, some residual deformation will occur. Rubber seismic isolation bearings experience significant displacement under seismic forces, and it is difficult for them to fully return to their original position when the force disappears. Rubber aging causes a gradual deterioration in its physicochemical and mechanical properties, reducing the load-bearing capacity of the seismic isolation device. This results in a weak isolation capability of the isolation layer composed of multiple seismic isolation devices, and in severe cases, the seismic isolation device will become unusable, leading to a short lifespan. Summary of the Invention

[0004] To overcome the shortcomings of weak seismic isolation capacity and short lifespan in the prior art, this invention provides a seismic isolation device, including a first connecting plate, at least three supporting members, a mounting core, and a second connecting plate. The first and second connecting plates are arranged parallel to each other. The mounting core is vertically disposed between the first and second connecting plates and located at the center. The supporting members are vertically disposed around the mounting core between the first and second connecting plates, and the lower end face of the supporting members has a first geometric structure. The upper surface of the second connecting plate, where it connects to the lower end face of the supporting members, has a second geometric structure that matches the first geometric structure. The mounting core can automatically recover after deformation. This not only improves the seismic isolation capacity but also extends the service life.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] This invention provides a vibration isolation device, which is disposed between a transformer / reactor and a foundation, and includes a first connecting plate, at least three supporting members, a mounting core, and a second connecting plate;

[0007] The first connecting plate and the second connecting plate are arranged in parallel;

[0008] The mounting core is vertically disposed between the first connecting plate and the second connecting plate, and is located at the center position;

[0009] The support member is vertically arranged between the first connecting plate and the second connecting plate around the mounting core, and the lower end face of the support member has a first geometric structure. The upper surface of the second connecting plate and the lower end face of the support member are provided with a second geometric structure that matches the first geometric structure.

[0010] The mounting core can automatically recover after deformation.

[0011] When the vibration isolation device is used for vibration isolation, the first geometric structure slides to the high point of the second geometric structure, and when the vibration isolation ends, the first geometric structure slides to the low point of the second geometric structure.

[0012] The first geometric structure is an arc-shaped protrusion, and the second geometric structure is an arc-shaped groove that mates with the arc-shaped protrusion, and the arc-shaped protrusion can slide on the arc-shaped groove.

[0013] It also includes multiple bolts, and the upper ends of the support member and the mounting core are both fixed to the first connecting plate by bolts.

[0014] The heights of the at least three supporting members and the mounting core are all equal.

[0015] The materials used for the first connecting plate, the second connecting plate, and the supporting components include carbon steel and alloy steel.

[0016] The thickness of the first connecting plate is less than the thickness of the second connecting plate.

[0017] The mounting core is made of lead metal.

[0018] The required horizontal stiffness of the transformer / reactor is determined based on the shear area of ​​the mounting core and the radius of curvature of the arc-shaped groove.

[0019] The first connecting plate is fixedly connected to the transformer / reactor, and the second connecting plate is fixedly connected to the foundation.

[0020] Compared with the closest existing technology, the technical solution provided by the present invention has the following beneficial effects:

[0021] The vibration isolation device provided by this invention is installed between a transformer / reactor and a foundation, including a first connecting plate, at least three supporting members, a mounting core, and a second connecting plate; the first connecting plate and the second connecting plate are arranged in parallel; the mounting core is vertically arranged between the first connecting plate and the second connecting plate and is located at the center; the supporting members are arranged vertically around the mounting core between the first connecting plate and the second connecting plate, and the lower end face of the supporting members has a first geometric structure, and the upper surface of the second connecting plate is provided with a second geometric structure that matches the first geometric structure at the connection between it and the lower end face of the supporting members; the mounting core can automatically recover after deformation, which not only improves the vibration isolation capacity but also has a long service life;

[0022] The technical solution provided by this invention has a simple structure, is easy to install, has low cost, is beneficial to the maintenance of electrical equipment, and has strong feasibility for engineering applications.

[0023] The supporting components of this invention are all made of carbon steel or alloy steel, and the mounting core is made of lead metal. The lead metal undergoes shear deformation, and friction is generated between the supporting components, which increases structural damping, dissipates seismic energy, and reduces the seismic response of the equipment. By adjusting the size of the shear surface of the mounting core and the radius of curvature of the contact surface of the supporting components, the horizontal stiffness required for normal operation and wind resistance of the equipment can be provided. The transformer and reactor designed with the seismic isolation device reduce the natural frequency of the equipment and avoid resonance between the equipment and seismic waves, thereby protecting the structural safety of the power facilities. After an earthquake, the self-weight of the transformer and reactor allows the seismic isolation device to return to its initial state without affecting the normal operation of the electrical equipment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the vibration isolation device in an embodiment of the present invention;

[0025] Figure 2 This is a top view of the first connecting plate in an embodiment of the present invention;

[0026] Figure 3 This is a cross-sectional view of the first connecting plate in an embodiment of the present invention;

[0027] Figure 4 This is a top view of the second connecting plate in an embodiment of the present invention;

[0028] Figure 5 This is a cross-sectional view of the second connecting plate in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the support component in an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the mounting core in an embodiment of the present invention;

[0031] In the diagram, 1 is the first connecting plate, 2 is the supporting component, 3 is the mounting core, 4 is the second connecting plate, and 5 is the bolt. Detailed Implementation

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

[0033] This invention provides a vibration isolation device, installed between a transformer / reactor and the foundation, such as... Figure 1 As shown, it includes a first connecting plate 1, at least three supporting members 2, a mounting core 3, and a second connecting plate 4;

[0034] The first connecting plate 1 and the second connecting plate 4 are horizontally arranged; the mounting core 3 is vertically arranged between the first connecting plate 1 and the second connecting plate 4, and is located in the center position;

[0035] The support member 2 is vertically arranged between the first connecting plate 1 and the second connecting plate 4 around the mounting core 3, and the lower end face of the support member 2 has a first geometric structure. The upper surface of the second connecting plate 4 and the lower end face of the support member 2 are provided with a second geometric structure that matches the first geometric structure.

[0036] The mounting core 3 can automatically recover after deformation.

[0037] When the seismic isolation device is used for seismic isolation, the first geometric structure slides to the high point of the second geometric structure, and when the seismic isolation ends, the first geometric structure slides to the low point of the second geometric structure.

[0038] The first geometric structure is an arc-shaped protrusion, and the second geometric structure is an arc-shaped groove that mates with the arc-shaped protrusion, and the arc-shaped protrusion can slide on the arc-shaped groove.

[0039] The vibration isolation device provided in this embodiment of the invention also includes a plurality of bolts 5, and the upper ends of the support member 2 and the mounting core 3 are both fixed to the first connecting plate 1 by bolts 5.

[0040] At least three supporting components 2 and mounting core 3 have the same height.

[0041] The top view and sectional view of the first connecting plate 1 are shown below. Figure 2 and Figure 3 As shown, the top view and sectional view of the second connecting plate 4 are respectively as follows: Figure 4 and Figure 5 As shown.

[0042] The materials used for the first connecting plate 1, the second connecting plate 4, and the supporting member 2 include carbon steel and alloy steel. The thickness of the first connecting plate 1 is less than the thickness of the second connecting plate 4.

[0043] Schematic diagram of support component 2 is shown below Figure 6 As shown in the diagram, the installation core 3 is illustrated below. Figure 7 As shown, the mounting core 3 is made of lead metal, but other metal materials with good shear energy dissipation capabilities can also be used.

[0044] The required horizontal stiffness of the transformer / reactor is determined based on the shear area of ​​the mounting core 3 and the radius of curvature of the arc-shaped groove.

[0045] The first connecting plate 1 is fixedly connected to the transformer / reactor, and the second connecting plate 4 is fixedly connected to the foundation.

[0046] Under the action of seismic waves, the superstructure of the seismic isolation device generates horizontal vibration, and the first connecting plate 1 and the second connecting plate 4 generate relative displacement. The mounting core 3 provides additional damping due to shear deformation, and the support member 2 and the second connecting plate 4 provide additional damping due to friction, dissipating seismic energy. The contact surface between the mounting core 3 and the support member 2 provides initial stiffness, maintaining the normal operation of the equipment. After the earthquake, under the self-weight of the superstructure of the seismic isolation device, the device returns to its initial shape.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Those skilled in the art can still make modifications or equivalent substitutions to the specific implementation of the present invention by referring to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are within the protection scope of the claims of the present invention pending approval.

Claims

1. An isolation device, characterized in that The shock isolation device is arranged between a transformer / reactor and a foundation, and comprises a first connecting plate, at least three support members, a mounting core and a second connecting plate; The first connecting plate and the second connecting plate are arranged in parallel; The mounting core is arranged vertically between the first connecting plate and the second connecting plate and is located at a central position; The support members are arranged around the mounting core and are arranged vertically between the first connecting plate and the second connecting plate, and the lower end surface of the support members has a first geometric structure, and the upper surface of the second connecting plate and the lower end surface of the support members are provided with a second geometric structure matched with the first geometric structure; The mounting core can automatically recover after deformation; When the shock isolation device is used for shock isolation, the first geometric structure slides to the high point of the second geometric structure, and when the shock isolation ends, the first geometric structure slides to the low point of the second geometric structure; The first geometric structure is an arc convex, the second geometric structure is an arc groove matched with the arc convex, and the arc convex can slide on the arc groove; The mounting core is made of lead metal.

2. The shock isolation device of claim 1, wherein A plurality of bolts are further included, and the upper end of each of the support members and the mounting core is fixed to the first connecting plate through the bolts.

3. The vibration isolation device according to claim 1 or 2, characterized in that The height of each of the at least three support members and the mounting core is equal.

4. The shock isolation device of claim 1, wherein The materials used by the first connecting plate, the second connecting plate and the support members include carbon steel and alloy steel.

5. The shock isolation device of claim 1, wherein The thickness of the first connecting plate is smaller than the thickness of the second connecting plate.

6. The shock isolation device of claim 1, wherein The horizontal stiffness required by the transformer / reactor is determined based on the shear area of the mounting core and the curvature radius of the arc groove.

7. The shock isolation device of claim 1, wherein The first connecting plate is fixedly connected with the transformer / reactor, and the second connecting plate is fixedly connected with the foundation.

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