A seismic isolation support and power supply system

Abstract

The present application provides a seismic isolation bearing and power supply system, including: an upper bearing plate, a lower bearing plate, a slider, a fixing device, and a telescopic combination component. When subjected to an earthquake, the seismic isolation bearing first consumes most of the seismic energy through the frictional sliding of the upper bearing plate and the lower bearing plate with the slider. When the vertical seismic action is large, the telescopic combination component increases the vertical stiffness of the bearing through the connection of the vertical connecting rod, and at the same time, through the effective connection with the fixing device, the combined structure can utilize the weight of the fixing device itself and the anchoring of the fixing device to the ground to further increase the vertical pull-out stiffness of the bearing, thereby preventing the bearing from being pulled out or overturned due to vertical earthquakes, and protecting the long-term effectiveness of the seismic isolation bearing.

Description

Technical Field

[0001] The present application relates to an earthquake protection device, and more particularly to a seismic isolation support and a power supply system. Background Art

[0002] As an important node in the UHV DC transmission project, the converter station can realize voltage rise and fall and AC / DC conversion, and the converter transformer is a key equipment in the station, and its safety affects the safety and stability of the entire transmission line. Due to the electrical performance requirements, cantilever components such as bushings and low-strength materials such as ceramics are used in converter transformers, making them highly vulnerable to earthquakes and easy to be damaged. Therefore, the safety of key electrical equipment such as converter transformers is particularly important, which requires the use of seismic isolation bearings to protect them.

[0003] Sliding friction pendulum isolation bearings have been used in seismic isolation of building structures. Their main components are upper and lower bearing plates and sliders. The upper and lower surfaces of the sliders can dissipate energy through sliding friction with the bearing plates. The isolation principle is to reduce the input of seismic energy by sliding the bearings, and to dissipate seismic energy by friction. Finite element software and shaking table tests have shown that after the converter transformer is equipped with sliding friction pendulum isolation bearings, its seismic response is significantly reduced, which is beneficial to reduce the seismic damage to the converter transformer.

[0004] However, the structural characteristics of the sliding friction pendulum seismic isolation bearing make it unable to withstand large vertical seismic effects. When the vertical seismic effect is large, the eccentric swing of the transformer may cause the sliding friction pendulum seismic isolation bearing to be pulled up, and the upper bearing plate is separated from the middle slider, causing the bearing to temporarily fail and generate impact loads, resulting in a further increase in the seismic response. Summary of the invention

[0005] The present application provides a seismic isolation bearing and power supply system to solve the problem that when the vertical seismic action is large, the eccentric swing of the transformer may cause its bearing to be pulled up, the upper bearing plate to separate from the middle slider, causing the bearing to temporarily fail and generate impact loads, resulting in a further increase in seismic response.

[0006] In the first aspect, the present application provides a seismic isolation bearing, comprising: an upper bearing plate, a lower bearing plate, a slider, a fixing device, and a telescopic combination component, wherein the slider is arranged between the upper bearing plate and the lower bearing plate; the side surface of the upper bearing plate is connected to the fixing device through the telescopic combination component; the side surface of the lower bearing plate is connected to the fixing device through the telescopic combination component; the telescopic combination component is a telescopic connecting rod mechanism composed of a plurality of connecting rods; at least two groups of the telescopic combination components are symmetrically arranged on both sides of the upper bearing plate with the upper bearing plate as the center.

[0007] Electrical equipment, such as converter transformers, is placed on the upper support plate. Therefore, the upper support plate, the lower support plate and the slider need to be made of very strong materials, such as stainless steel. The upper support plate and the lower support plate can be of any shape, and their area can meet the needs of placing electrical equipment. The upper support plate and the lower support plate can both slide and rub with the slider. When an earthquake comes, the input seismic energy is consumed by the sliding friction between the upper support plate and the lower support plate and the slider to protect the safety of the electrical equipment placed on the upper support plate. The fixing device needs to be anchored to the ground so that it can provide support in the vertical direction. The telescopic combination component can be telescopically moved in the horizontal direction, so as not to affect the sliding friction between the upper support plate and the lower support plate and the slider. At least two groups of telescopic combination components are arranged in symmetrical positions to ensure that they play an anti-pullout role in the vertical direction. When the vertical vibration of the earthquake is large, the upper support plate and the lower support plate are connected to the fixing device through the telescopic combination component, thereby preventing the upper support plate from being separated from the middle slider, causing the failure of the seismic isolation bearing.

[0008] Optionally, the telescopic combination component includes cross braces, vertical connecting rods, and a connecting device, wherein the cross braces are interconnected through the connecting device to form a diamond mesh structure; the cross braces are connected to the upper support plate to form an upper layer of the telescopic combination component, and the cross braces are connected to the lower support plate to form a lower layer of the telescopic combination component; the vertical connecting rods connect the upper and lower layers of the telescopic combination component together through the connecting device.

[0009] The diamond mesh structure is easy to implement and maintain, and the diamond mesh structure can have good telescopic mobility in the horizontal direction. The cross braces that make up the diamond mesh structure can be of the same specifications and sizes, which is convenient for processing and manufacturing, and is also relatively easy to repair and replace in the future. The vertical connecting rod connects the upper and lower layers of the telescopic combination component together, while not affecting the telescopic movement in the horizontal direction, increasing the supporting force in the vertical direction, so that when the vertical vibration of the earthquake is large, the upper support plate not only plays an anti-pullout role through the connection of the fixing device, but the vertical connecting rod also increases the anti-pullout strength.

[0010] Optionally, the connecting device is a hinge.

[0011] The telescopic combined component is connected in an articulated manner so that it can telescope in the horizontal direction.

[0012] Optionally, the upper support plate and the lower support plate are quadrilaterals; the fixing device includes a base and four side walls; the lower support plate is placed on the bottom of the fixing device; the four sides of the upper support plate are connected to the four side walls of the fixing device through four groups of connecting rods of the telescopic combination components; the four sides of the lower support plate are connected to the four side walls of the fixing device through four groups of connecting rods of the telescopic combination components.

[0013] The upper support plate and the lower support plate are arranged in a quadrilateral shape, which is easy to process and manufacture, and most electrical equipment is also quadrilateral, so the utilization rate of the upper support plate area is relatively large. The fixing device needs to use a very strong material, such as a stainless steel box, which is easy to install, and its own weight can increase the vertical pull-out strength. The four sides of the upper support plate and the lower support plate are provided with four groups of telescopic assembly components connected to the four side walls of the fixing device, which can further increase the vertical pull-out strength.

[0014] Optionally, the connecting rod of the telescopic combination component is connected to the fixing device in a hinged manner; the connecting rod of the telescopic combination component is connected to the upper support plate and the lower support plate in a hinged manner.

[0015] The connecting rod of the telescopic combined component can be telescopically moved by being connected in an articulated manner.

[0016] Optionally, the upper support plate and the lower support plate both include friction surfaces, and the friction surfaces are arc-shaped concave surfaces; the upper surface and lower surface of the slider are convex surfaces, the upper surface of the slider contacts the friction surface of the upper support plate, and the lower surface of the slider contacts the friction surface of the lower support plate.

[0017] The arc concave radii of the upper support plate and the lower support plate are equal, and the arc concave radii are also equal to the convex radii of the upper and lower surfaces of the slider. After adding the arc friction surface, the upper and lower support plates have centripetal restoring forces. When the earthquake vibration is small, the slider will only slide in the middle part of the arc friction surface; when the vibration becomes larger, the slider will slide to the edge of the arc friction surface; when the vibration becomes smaller, the slider will slide back to the middle part of the arc friction surface. This makes the upper and lower support plates have the function of automatic reset, and only when the earthquake vibration is large, the swing displacement of the upper and lower support plates will be relatively large. At the same time, the friction damping force and the centripetal restoring force are proportional to the pressure of the upper structure acting on the seismic isolation support, that is, the heavier the electrical equipment on the upper support plate, the greater the friction damping force generated, so that it has the characteristics of large vertical stiffness and high vertical bearing capacity.

[0018] In a second aspect, the present application also provides a power supply system, comprising a transformer and the above-mentioned seismic isolation support, wherein the transformer is placed on the seismic isolation support.

[0019] When subjected to earthquake action, the seismic isolation bearing first consumes most of the seismic energy through the friction sliding between the upper bearing plate and the lower bearing plate and the slider, reducing the seismic energy input to the transformer, thereby reducing its seismic response. When the vertical earthquake action is large, the telescopic composite component increases the vertical strength of the seismic isolation bearing through the connection of the vertical connecting rod, and at the same time effectively connects with the stainless steel box of the fixing device, so that the composite structure can use the weight of the fixing device itself and the anchoring of the fixing device to the ground to further increase the vertical pull-out strength of the seismic isolation bearing, prevent the seismic isolation bearing from being pulled up or overturned due to vertical earthquakes, protect the long-term effectiveness of the seismic isolation bearing, and improve the seismic resistance of the power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 A cross-sectional view of the seismic isolation support described in this application;

[0022] Figure 2 A top view of the seismic isolation support described in this application;

[0023] Figure 3 This is a schematic diagram of the connection method of the telescopic combined components of the seismic isolation support described in this application;

[0024] Figure 4 This is a schematic diagram of the arrangement of the seismic isolation bearings described in this application;

[0025] Illustration Description:

[0026] Among them, 1-upper support plate, 2-lower support plate, 3-slider, 4-fixing device, 5-cross support rod, 6-vertical connecting rod, 7-connecting device, 8-telescopic combined component. DETAILED DESCRIPTION

[0027] The following embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following embodiments do not represent all implementations consistent with the present application. They are only examples of devices and systems consistent with some aspects of the present application as detailed in the claims.

[0028] In the first aspect, the present application provides a seismic isolation support, see Figure 4This is a schematic diagram of the arrangement of the seismic isolation bearings described in the present application. It includes: an upper bearing plate 1, a lower bearing plate 2, a slider 3, a fixing device 4, and a telescopic assembly member 8. Electrical equipment, such as a converter transformer, etc., needs to be placed on the upper bearing plate 1. Therefore, the upper bearing plate 1, the lower bearing plate 2 and the slider 3 need to be made of very strong materials, such as stainless steel. For ease of processing, the upper bearing plate 1 and the lower bearing plate 2 are set to be square, and most of the electrical equipment is also square, so that the area of ​​the upper bearing plate 1 can be effectively utilized. The fixing device 4 also needs to be made of very strong materials, such as stainless steel. According to the shapes of the upper bearing plate 1 and the lower bearing plate 2, the fixing device 4 is set to a cubic structure, including a square base and four side walls.

[0029] During the assembly process, the fixture 4 is first placed at the location where the converter transformer is to be installed in the converter station, and anchored to the ground. Then the lower support plate 2 is placed at the center of the base of the fixture 4, the slider 3 is placed at the center of the lower support plate 2, and finally the upper support plate 1 is placed on the slider 3. Figure 1 shown.

[0030] When the lower support plate 2 is placed at the center of the base of the fixture 4, the four sides of the lower support plate 2 are parallel to the four side walls of the fixture 4. When the upper support plate 1 is placed on the slider 3, the four sides of the upper support plate 1 and the four sides of the lower support plate 2 are parallel and aligned.

[0031] The upper bearing plate 1 and the lower bearing plate 2 are both provided with concave spherical friction surfaces with equal radius, and the upper and lower surfaces of the slider 3 are convex surfaces with equal radius to the concave spherical surface, so that the upper and lower surfaces of the slider 3 can slide and rub with the upper bearing plate 1 and the lower bearing plate 2, and the input seismic energy can be consumed by sliding friction. At the same time, the friction damping force and the centripetal restoring force are proportional to the pressure of the upper structure acting on the seismic isolation bearing, that is, the heavier the electrical equipment on the upper bearing plate 1, the greater the friction damping force generated, so that it has the characteristics of large vertical stiffness and high vertical bearing capacity.

[0032] During assembly, the cross braces 5 are hingedly connected in sequence by the connecting device 7 to form a diamond-shaped mesh telescopic structure. The connecting device 7 is a hinge. Figure 2 As shown. The combined rhombus mesh telescopic structure should be able to telescope horizontally. The size of the combined rhombus mesh is determined by the distance from one side of the lower support plate 2 to the corresponding side wall of the fixing device 4.

[0033] During assembly, a group of diamond-shaped mesh telescopic structures is made for the upper support plate 1, and a group of diamond-shaped mesh telescopic structures is made for the lower support plate 2. Then, the two groups of diamond-shaped mesh telescopic structures are hingedly connected by a vertical connecting rod 6 to form a telescopic combined component 8. Figure 3As shown, check whether the assembled components can still telescope in the horizontal direction. If not, it is necessary to adjust the connections that cannot telescope to ensure that they can telescope in the horizontal direction and have a fixed effect in the vertical direction.

[0034] During assembly, the telescopic combination components 8 are made into four groups, and then each of them is hingedly connected on the four sides of the upper support plate 1 and the lower support plate 2. The upper layer of the telescopic combination component 8 is hingedly connected to the upper support plate, the lower layer of the telescopic combination component 8 is hingedly connected to the lower support plate 2, and the other ends of the telescopic combination components 8 are hingedly connected to the inner wall of the stainless steel box of the corresponding fixing device 4. After the installation is completed, the upper support plate is leveled and the electrical equipment is installed on the upper part.

[0035] In an illustrative embodiment, the upper support plate 1 and the lower support plate 2 are configured as triangles, and the fixing device 4 is configured as a triangular prism structure with an open top, including a base and three side walls.

[0036] During the assembly process, the fixture 4 is first placed at the location where the converter transformer is to be installed in the converter station and anchored to the ground. Then the lower support plate 2 is placed at the center of the base of the fixture 4, the slider 3 is placed at the center of the lower support plate 2, and finally the upper support plate 1 is placed on the slider 3.

[0037] When the lower support plate 2 is placed at the center of the base of the fixture 4, the three sides of the lower support plate 2 are parallel to the three side walls of the fixture 4. When the upper support plate 1 is placed on the slider 3, the three sides of the upper support plate 1 and the three sides of the lower support plate 2 are parallel and aligned.

[0038] During assembly, the telescopic combination components 8 are made into three groups as described in the above scheme, and then are respectively hingedly connected on the three sides of the upper support plate 1 and the lower support plate 2. The upper layer of the telescopic combination component 8 is hingedly connected to the upper support plate, the lower layer of the telescopic combination component 8 is hingedly connected to the lower support plate 2, and the other ends of the telescopic combination components 8 are hingedly connected to the inner walls of the corresponding fixing devices 4. After the installation is completed, the upper support plate is leveled and the electrical equipment is installed on the upper part.

[0039] When an earthquake occurs, the seismic isolation bearing first consumes most of the seismic energy through the friction and sliding of the upper bearing plate 1 and the lower bearing plate 2 and the slider 3, reducing the seismic energy input to the electrical equipment, thereby reducing the seismic response of the structure. When the vertical earthquake action is large, the telescopic composite component 8 increases the vertical strength of the bearing through the connection of the vertical connecting rod 6, and at the same time effectively connects with the stainless steel box of the fixing device 4, so that the composite structure can use the weight of the fixing device 4 itself and the anchoring of the fixing device 4 to the ground to further increase the vertical pull-out strength of the bearing, prevent the bearing from being pulled up or overturned due to vertical earthquakes, and protect the long-term effectiveness of the seismic isolation bearing.

[0040] In a second aspect, the present application provides a power supply system, including a converter transformer and the above-mentioned seismic isolation support. The seismic isolation support is first installed according to the above-mentioned method, and then electrical equipment such as the converter transformer is installed on the seismic isolation support.

[0041] When the power supply system is subjected to an earthquake, the performance of the seismic isolation bearing can not only meet the seismic reduction and isolation requirements of the converter transformer under multi-dimensional earthquake input, but also solve the problem of the upper bearing plate 1 and the slider 3 being pulled out due to excessive vertical seismic action, thereby ensuring that the seismic isolation bearing continues to efficiently exert its seismic isolation effect, reduces the seismic response of the converter transformer, reduces the seismic damage to the converter transformer, and protects the safety of the power supply system.

[0042] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the general concept of this application and do not constitute a limitation on the protection scope of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without creative work belong to the protection scope of this application.

Claims

1. A seismic isolation bearing, characterized in that: include: An upper support plate (1), a lower support plate (2), a sliding block (3), a fixing device (4), and a telescopic combined component (8), wherein: The sliding block (3) is arranged between the upper support plate (1) and the lower support plate (2); The side surface of the upper support plate (1) is connected to the fixing device (4) via the telescopic combined component (8); The side surface of the lower support plate (2) is connected to the fixing device (4) via the telescopic combined component (8); The telescopic combined component (8) is a telescopic connecting rod mechanism composed of a plurality of connecting rods; The telescopic combined component (8) comprises a cross brace (5), a vertical connecting rod (6), and a connecting device (7), wherein: The cross braces (5) are connected to each other through the connecting device (7) to form a diamond-shaped network structure; The cross brace (5) is connected to the upper support plate (1) to form the upper layer of the telescopic combined component (8), and the cross brace (5) is connected to the lower support plate (2) to form the lower layer of the telescopic combined component (8); The vertical connecting rod (6) connects the upper layer and the lower layer of the telescopic combined component (8) together through the connecting device (7); At least two groups of telescopic combined components (8) are symmetrically arranged on both sides of the upper support plate (1) with the upper support plate (1) as the center.

2. The seismic isolation support according to claim 1, characterized in that: The connecting device (7) is a hinge.

3. The seismic isolation support according to claim 1, characterized in that: The upper support plate (1) and the lower support plate (2) are quadrilaterals; The fixing device (4) comprises a base and four side walls; The lower support plate (2) is placed on the bottom of the fixing device (4); The four sides of the upper support plate (1) are connected to the four side walls of the fixing device (4) through four groups of connecting rods of the telescopic combined components (8); The four sides of the lower support plate (2) are connected to the four side walls of the fixing device (4) via four groups of connecting rods of the telescopic combined components (8).

4. The seismic isolation bearing according to claim 1 or 3, characterized in that: The connecting rod of the telescopic combined component (8) is connected to the fixing device (4) in an articulated manner; The connecting rod of the telescopic combined component (8) is connected to the upper support plate (1) in a hinged manner; The connecting rod of the telescopic combined component (8) is connected to the lower support plate (2) in a hinged manner.

5. The seismic isolation bearing according to claim 1, characterized in that: The upper support plate (1) and the lower support plate (2) both comprise friction surfaces, and the friction surfaces are arc-shaped concave surfaces; The upper surface and the lower surface of the slider (3) are convex surfaces; the upper surface of the slider (3) contacts the friction surface of the upper support plate (1); and the lower surface of the slider (3) contacts the friction surface of the lower support plate (2).

6. A power supply system, characterized in that: It comprises a transformer and the seismic isolation support according to any one of claims 1 to 5, wherein the transformer is placed on the seismic isolation support.

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