A building seismic isolation support

Abstract

This utility model discloses a seismic isolation bearing for buildings, relating to the field of seismic isolation technology for engineering structures. It includes a bearing body, a top plate, a piston assembly, and an inflation assembly. The top plate is fixedly connected to the piston assembly via bolts. The bearing body is connected to the top plate via a positioning rod and a connecting hole. A dustproof and vibration-damping rubber layer is provided on the top of the bearing body. The piston assembly slides and seals against the inner cavity of the bearing body through the dustproof and vibration-damping rubber. The inflation assembly is installed in the piston assembly. A wireless remote pressure sensor in the inflation assembly ensures that the piston is inflated to a set pressure within the piston cavity. An alarm is triggered when the pressure exceeds or falls below the set pressure during operation. In this utility model, a metal-coated rubber layer forms a first seal between the piston end face and the bottom of the bearing body, simultaneously forming a rubber vibration-damping layer. The outer surface of the piston forms a second seal with the inner wall of the bearing body via a sealing ring, thus effectively ensuring the sealing performance and vibration isolation effect of the bearing body.

Description

Technical Field

[0001] This utility model relates to the field of seismic isolation technology for engineering structures, and in particular to a seismic isolation bearing for buildings. Background Technology

[0002] With the advancement of technology, people have increasingly higher requirements for building safety. In the field of seismic isolation and damping control devices for building structures in my country, there are many types of damping products. However, most products are only effective against horizontal earthquakes and are not very effective in buffering vertical earthquakes (including vibrations caused by passing trains, subways, and trucks), which can cause significant damage.

[0003] When buildings are subjected to strong earthquakes or overload, many building and bridge structures may suffer damage or even collapse. In high-intensity seismic zones, relying solely on the structure's own seismic resistance is insufficient to guarantee structural safety. The emergence of seismic isolation devices has provided a new method for the seismic design of building and bridge structures, and their effectiveness has been verified in actual engineering projects. As a traditional seismic isolation device, lead-core rubber bearings have been widely used.

[0004] Although traditional lead-core rubber bearings are simple to install and have good seismic isolation effects, they still have some shortcomings. Traditional lead-core rubber bearings achieve seismic isolation by extending the fundamental natural period of the structure, but resonance caused by the long-period components of earthquakes cannot be completely avoided, and the rubber is prone to aging during use, resulting in poor quality reliability. Existing lead-core rubber bearings are exposed to various harsh environments for a long time, making them susceptible to natural damage such as collisions, temperature differences, and corrosion, resulting in poor durability. Utility Model Content

[0005] The purpose of this utility model is to provide a seismic isolation bearing for buildings. The piston assembly structure is sealed by the inner cavity of the bearing body and the metal-coated body. This single layer is sufficient to achieve a good seal. In addition, the sealing ring set on the outer surface of the piston achieves a double-layer seal between the piston assembly and the bearing body, thereby effectively ensuring the sealing and seismic isolation effect between the piston and the bearing body. At the same time, the lead core embedded in the metal-coated body can effectively increase the support strength of the piston assembly and the reliability of the seismic isolation bearing.

[0006] To achieve the above objectives, this utility model provides a building seismic isolation bearing, including a bearing body, a top plate, a piston assembly, and an inflation assembly. The top plate is fixedly connected to the piston assembly in the middle by fixing bolts, and the top plate is provided with evenly distributed connection holes for fixing. The bearing body is connected to the connection holes by a positioning rod. The top of the bearing body is provided with dustproof and vibration-damping rubber. The piston assembly passes through the dustproof and vibration-damping rubber and slides and seals with the inner cavity of the bearing body. The inflation assembly is fixedly installed on one side of the bearing body and communicates with the inner wall of the piston assembly.

[0007] Preferably, the piston assembly includes a piston, a first sealing ring, a second sealing ring, a central vibration-damping rubber pad, and an inner metal-coated body. A rubber pad is provided at the connection position between the top of the piston and the top plate. The central vibration-damping rubber pad is fixedly installed in the middle of the bottom of the piston and abuts against the support body. An annular groove is provided on the outer surface of the piston. The first sealing ring and the second sealing ring are fixedly installed in the annular groove. The bottom of the inner metal-coated body is in contact with the bottom surface of the inner cavity of the support body, and the top of the inner metal-coated body is in contact with the bottom end face of the piston, ensuring a sealed connection between the inner wall of the piston and the inner cavity of the support body.

[0008] Preferably, the interior of the cavity metal-coated body is covered with a lead core to improve its supporting strength, and the material of the cavity metal-coated body is rubber.

[0009] Preferably, the piston has four annular grooves, with two first sealing rings installed in the middle annular groove and two second sealing rings installed in the top and bottom annular grooves. The first sealing rings are O-rings and the second sealing rings are Y-rings.

[0010] Preferably, the inflation assembly includes a valve core, a wireless remote pressure sensor, and a copper tube. One end of the copper tube is welded and fixed to an inflation hole on the inner wall of the piston assembly, and the other end away from the support body is connected to the valve core. The wireless remote pressure sensor is fixedly connected to the copper tube through a connector, and the connector is welded to the copper tube.

[0011] Preferably, the inflation component calculates the rated inflation pressure value based on the set rated gravity load.

[0012] Preferably, the top of the support body is provided with a plurality of ear holes, the number of which is the same as the number of the connecting holes, and the positioning rod passes through the ear holes and is connected to the connecting holes.

[0013] Therefore, the seismic isolation bearing of this invention, which adopts the above-described structure, has the following advantages compared with the prior art:

[0014] (1) The piston assembly used in this utility model forms a first sealing and vibration isolation layer with the bottom surface of the support body through the metal-coated body in the cavity, and the outer surface of the piston achieves a second sealing with the inner wall of the support body through the sealing ring, thereby realizing a double-layer seal between the piston assembly and the support body, and thus effectively ensuring the sealing and vibration isolation effect between the piston and the support body.

[0015] (2) In this utility model, embedding a lead core into the inner metal coating of the cavity can effectively increase the support strength of the piston assembly and realize the reliability of the seismic isolation bearing in use.

[0016] (3) The present invention is equipped with an inflation component. The valve core and wireless remote air pressure sensor in the inflation component realize precise control of the rated inflation pressure value, alarm when the air pressure exceeds or is insufficient, ensuring the effectiveness of the support when it is working. When the piston moves downward slightly, it can consume a lot of energy and achieve a good vibration isolation effect, ensuring the safety of the building on the support and further improving the life of the building. Attached Figure Description

[0017] Figure 1 This is an exploded view of the overall structure of a seismic isolation bearing according to this utility model.

[0018] Figure 2 This is a three-dimensional structural diagram of a seismic isolation bearing for buildings according to the present invention. Figure 1 ;

[0019] Figure 3 This is a three-dimensional structural diagram of a seismic isolation bearing for buildings according to the present invention. Figure 2 ;

[0020] Figure 4 This is a cross-sectional view of Embodiment 1 of the seismic isolation bearing of this utility model;

[0021] Figure 5 This is a cross-sectional view of Embodiment 2 of the seismic isolation bearing of this utility model;

[0022] Figure 6 This is a three-dimensional model of a piston in a seismic isolation bearing of a building according to the present invention.

[0023] Figure label:

[0024] 1. Support body; 11. Ear hole; 2. Top plate; 21. Connecting hole; 3. Piston assembly; 31. Piston; 3101. Annular groove; 3102. Welding through hole; 32. First sealing ring; 33. Second sealing ring; 34. Inner cavity metal-coated body; 35. Lead core; 36. Central vibration isolation rubber pad; 4. Inflation assembly; 41. Copper tube; 42. Connecting joint; 43. Wireless remote air pressure sensor; 44. Valve core; 5. Positioning rod; 6. Fixing bolt; 7. Rubber pad; 8. Dustproof and vibration isolation rubber. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0026] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] Example 1

[0028] like Figure 1 This is an exploded view of the overall structure of a seismic isolation bearing according to this utility model. Figure 2 This is a three-dimensional structural diagram of a seismic isolation bearing for buildings according to the present invention. Figure 1 , Figure 3 This is a three-dimensional structural diagram of a seismic isolation bearing for buildings according to the present invention. Figure 2 In this embodiment 1, the support includes a support body 1, a top plate 2, a piston assembly 3, and an inflation assembly 4 for pressurizing the piston assembly 3. The top plate 2 is fixedly connected to the piston assembly 3 in the middle by fixing bolts 6, and the top plate 2 is evenly provided with connecting holes 21 for fixing. Several ear holes 11 are provided on the top of the support body 1, and the number of ear holes 11 is the same as the number of connecting holes 21. During assembly, the positioning rod 5 passes through the ear holes 11 and connects with the connecting holes 21, so that the support body 1 is connected to the connecting holes 21 through the positioning rod 5. The top of the support body 1 is provided with dustproof and vibration isolation rubber 8, which is fixed between the support body 1 and the top plate 2. The dustproof and vibration isolation rubber 8 can play the role of dustproof and vibration isolation. During installation, the piston assembly 3 passes through the dustproof and vibration isolation rubber 8 and slides and seals with the inner cavity of the support body 1. The inflation assembly 4 is fixedly installed on one side of the support body 1 and communicates with the inner wall of the piston assembly 3. Piston assembly 3 includes piston 31, first sealing ring 32, second sealing ring 33, inner metal-coated body 34, and central vibration-damping rubber pad 36. A rubber pad 7 is provided at the connection point between the top of piston 31 and top plate 2. The central vibration-damping rubber pad 36 is fixedly installed in the middle of the bottom of piston 31 and abuts against the support body 1. The central vibration-damping rubber pad 36 serves to isolate vibrations and ensure better coaxiality with the support body within the support during piston movement. Figure 4As shown, during installation, the bottom of the inner metal-coated body 34 is fitted against the bottom surface of the inner cavity of the support body 1, and the top of the inner metal-coated body 34 is fitted against the bottom end face of the piston 31. This ensures a sealed connection between the inner wall of the piston 31 and the inner cavity of the support body 1, achieving good sealing performance and vibration isolation effect of the support body. The piston assembly 3 forms the first sealing and vibration isolation layer with the bottom end of the support body 1 through the inner metal-coated body 34. At the same time, it allows the piston 31 to be better coaxial with the support body 1 within the support during operation, thus further ensuring sealing performance. Figure 6As shown, the outer surface of the piston 31 is provided with an annular groove 3101. The first sealing ring 32 and the second sealing ring 33 are fixedly installed in the annular groove 3101. In this embodiment, the piston 31 has four annular grooves 3101. The two first sealing rings 32 are respectively installed in the middle annular groove 3101, and the two second sealing rings 33 are installed in the top and bottom annular grooves 3101. The first sealing rings 32 adopt an O-ring sealing structure, and the second sealing rings 33 adopt a Y-ring sealing structure, so that the outer surface of the piston 31 is sealed to the inner wall of the support body 1 through the first sealing rings 32 and the second sealing rings 33. In this embodiment, the double-layer seal between the piston assembly 3 and the support body 1 effectively ensures the sealing and vibration isolation effect between the piston 31 and the support body 1. The inflation component 4 includes a valve core 44, a wireless remote pressure sensor 43, and a copper tube 41. One end of the copper tube 41 is welded and fixed to an inflation hole on the inner wall of the piston assembly 3, and the end away from the support body 1 is connected to the valve core 44. The wireless remote pressure sensor 43 is fixedly connected to the copper tube 41 through a connecting joint 42. During welding, the connection between the copper tube 41 and the piston 31 is flame welded. The copper tube 41 is passed through a welding through hole 3102 on the piston 31 to connect it to the inner wall of the piston 31. The connecting joints 42 on the copper tube 41, valve core 44, and wireless remote pressure sensor 43 are also flame welded. During operation, the inflation component 4 calculates the rated inflation pressure value based on the set rated gravity load. The calculated rated air pressure is the air pressure required for inflation. After the support is assembled, the rated air pressure calculated based on the required rated load is labeled on the support next to the copper tube 41. The label has three parameters: the specific value of the rated air pressure, the maximum air pressure (10% higher than the rated air pressure), and the specific value of the minimum air pressure (20% lower than the rated air pressure). Inflation is performed using the appropriate air pump. The wireless remote air pressure sensor 43 has three air pressure values: real-time air pressure, maximum air pressure, and minimum air pressure. During inflation, the real-time air pressure value of the wireless remote air pressure sensor 43 must match the rated air pressure value on the label. Inflation stops when they match. If the value is higher, air must be released; if the value is lower, inflation continues until they match. The maximum air pressure is 10% higher than the rated air pressure, and the minimum air pressure is 20% lower than the rated air pressure. An alarm is triggered when the maximum air pressure is exceeded, indicating a possible earthquake or severe overload. If multiple supports alarm simultaneously, it indicates a strong earthquake or overloading of the entire building (such as the Qiqihar No. 34 Middle School Gymnasium). If different supports alarm sequentially, it indicates vehicle overloading. An alarm will sound when the minimum air pressure is reached, requiring inflation. Inflation must be performed only when no vehicles or heavy objects are passing over the building supporting the support, and inflation must be completed to the rated pressure. Before leaving the factory, an airtightness test is required: after inflation to the maximum pressure, the system should be left to stand for one day to ensure the real-time pressure reading of the wireless remote pressure sensor has not decreased, and then some gas should be released to the rated pressure.The working principle of the bearing for energy dissipation and vibration reduction: By setting a rubber vibration isolation layer on the bearing, a rubber layer is provided between the piston end face and the bearing body, and a rubber layer is provided between the top plate and the bearing body. During the operation of the bearing, the elastic compression of the rubber layer allows the piston 31 to have stroke space when moving. The compression of high-pressure air and the elastic deformation of the rubber achieve the effect of vertical vibration isolation and energy dissipation. A wireless remote air pressure sensor 43 is used to display and view the air pressure value inside the cavity. When vehicles or other vehicles pass over the building on the bearing, vibration is generated. If the rated load is not exceeded, the bearing will also vibrate. At this time, the piston makes a very small movement. Because the piston is filled with high pressure, a lot of energy is consumed. At the same time, due to the rubber vibration isolation layer, it plays a good role in absorbing shock and dissipating energy, thereby effectively protecting the building on the bearing. When the rated load is exceeded, the lack of a seismic isolation bearing will have a significant impact on the safety and lifespan of the building. With this bearing, it not only absorbs shock and dissipates energy, but also causes the piston 31 to move downwards slightly. At this time, the internal pressure of the piston 31 increases, achieving balance with the weight of the overloaded vehicle. After this, it quickly returns to its original position under the action of high-pressure gas, thus protecting the building and vehicle. During long-term use, a small amount of air leakage is inevitable. When the piston 31 returns to its original position, if the air pressure inside its inner wall is less than 80% of the rated air pressure, air can be injected into the inner wall of the piston 31 through the valve core 44 in the inflation assembly 4 and the copper tube 41. Inflation can also be performed whenever convenient, ensuring that the air pressure inside the piston 31 reaches the rated inflation pressure after inflation. Of course, an air pressure of 80% of the rated air pressure does not affect the bearing's effectiveness; it only slightly increases the piston's movement during operation. This invention effectively ensures the sealing and vibration isolation effect between the piston assembly 3 and the support body 1 through a double-layer seal. At the same time, the use of high-pressure gas avoids the disadvantage of traditional lead-core rubber vibration isolation bearings that are prone to aging and thus have poor quality and reliability.

[0029] Example 2

[0030] This embodiment has a basically the same main structure as Embodiment 1, such as... Figure 5 As shown, the inner metal-coated body 34 is covered with a lead core 35 to improve its support strength. The material of the inner metal-coated body 34 is rubber. Embedding the lead core 35 into the inner metal-coated body 34 can effectively increase the support strength of the piston assembly 3. The embedded lead core 35 undergoes plastic deformation under seismic action and converts seismic energy into heat energy through hysteresis characteristics, significantly reducing the vibration amplitude and displacement of the structure. At the same time, due to the high-pressure gas in the cavity, it can be reset immediately after the earthquake, effectively avoiding the deformation of the inner metal-coated body 34 during vibration and achieving safety and reliability in the use of the support.

[0031] In this invention, the high-pressure gas inside the support cavity can withstand the weight of the building for a long time. When an earthquake or a large vibration (such as when a train or freight train passes by) occurs, the piston 31 moves up and down, consuming a lot of energy. The shock absorption and energy dissipation effectively ensure the safety of the building on the support and improve the building's lifespan. At the same time, this support also provides a new approach to ship berthing at docks. By installing this support on the dock and wrapping rubber at the contact point between the ship and the support, ships can be effectively and smoothly berthed.

[0032] Therefore, the vibration damping bearing structure used in this utility model is simple. Its high-pressure gas avoids the environmental pollution and aging issues associated with traditional rubber vibration isolation bearings, which can lead to unstable quality. When earthquakes, vibrations, or overloads occur, the piston consumes a significant amount of energy during its up-and-down movement, effectively isolating the structure and reducing the destructive effects of earthquakes and vibrations. After the event, the piston quickly returns to its original position under the pressure of the high-pressure gas within the cavity. The double-layer seal between the piston assembly and the bearing body, along with the rubber vibration isolation layer, effectively ensures the sealing performance and vibration isolation effect between the piston and the bearing body. Simultaneously, embedding a lead core within the inner metal-coated rubber body effectively increases the support strength of the piston assembly and enhances the reliability of the vibration isolation bearing during use.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A seismic isolation bearing for buildings, characterized in that: The system includes a support body, a top plate, a piston assembly, and an inflation assembly. The top plate is fixedly connected to the piston assembly at its center by fixing bolts, and the top plate has evenly distributed connection holes for fixing. The support body is connected to the connection holes via positioning rods. The top of the support body is provided with dustproof and vibration-damping rubber. The piston assembly passes through the dustproof and vibration-damping rubber and slides and seals against the inner cavity of the support body. The inflation assembly is fixedly installed on one side of the support body and communicates with the inner wall of the piston assembly. The piston assembly includes a piston, a first sealing ring, a second sealing ring, and a middle... The piston comprises a central vibration-damping rubber pad and an inner metal-coated body. A rubber pad is provided at the connection position between the top of the piston and the top plate. The central vibration-damping rubber pad is fixedly installed in the middle of the bottom of the piston and abuts against the support body. An annular groove is provided on the outer surface of the piston. The first sealing ring and the second sealing ring are fixedly installed in the annular groove. The bottom of the inner metal-coated body is in contact with the bottom surface of the inner cavity of the support body, and the top of the inner metal-coated body is in contact with the bottom end face of the piston, ensuring that the inner wall of the piston is sealed to the inner cavity of the support body.

2. The seismic isolation bearing for buildings according to claim 1, characterized in that: The interior of the cavity metal-coated body is covered with a lead core to improve its supporting strength, and the material of the cavity metal-coated body is rubber.

3. A seismic isolation bearing for buildings according to claim 1, characterized in that: The piston has four annular grooves. Two first sealing rings are installed in the middle annular groove, and two second sealing rings are installed in the top and bottom annular grooves. The first sealing rings adopt an O-ring structure, and the second sealing rings adopt a Y-ring structure.

4. A seismic isolation bearing for buildings according to claim 1, characterized in that: The inflation assembly includes a valve core, a wireless remote pressure sensor, and a copper tube. One end of the copper tube is welded and fixed to an inflation hole on the inner wall of the piston assembly, and the other end away from the support body is connected to the valve core. The wireless remote pressure sensor is fixedly connected to the copper tube through a connector, and the connector is welded to the copper tube.

5. A seismic isolation bearing for buildings according to claim 4, characterized in that: The inflation component calculates the rated inflation pressure value based on the set rated gravity load.

6. A seismic isolation bearing for buildings according to claim 1, characterized in that: The top of the support body is provided with a number of ear holes, the number of which is the same as the number of connecting holes. The positioning rod passes through the ear holes and is connected to the connecting holes.

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