A seismic isolation device and a method of adjusting the same

Abstract

The application relates to the field of building structure isolation, in particular to a kind of isolation device and its adjusting method, the isolation device includes first connecting support, second connecting support and isolation mechanism, two ends of the isolation mechanism are hinged with the first connecting support and the second connecting support respectively, the second connecting support is two, two second connecting supports are located at the two sides of the first connecting support respectively. The isolation mechanism includes an isolation oil cylinder, one end of the isolation oil cylinder is hinged with the second connecting support, the isolation oil cylinder includes a cylinder body and a piston rod, one end of the piston rod is slidably arranged in the cylinder body, the other end of the piston rod is provided with a connecting part, the piston rod is hinged with the first connecting support through the connecting part, and the connecting part is integrally formed with the piston rod. The isolation mechanism further includes a stop structure, the stop structure is arranged at one end of the cylinder body, and the length of the stop structure is variable.

Description

Technical Field

[0001] This invention relates to the field of seismic isolation in building structures, and particularly to a seismic isolation device and its adjustment method. Background Technology

[0002] Seismic isolation technology reduces the seismic response of the superstructure by installing seismic isolation bearings between the building structure and the foundation, thereby extending the natural period of the structure and dissipating seismic energy. In heavy-duty building scenarios such as industrial plants, large storage tanks, and nuclear power plants, the seismic isolation bearings need to withstand large vertical loads, which places high demands on the load-bearing capacity and parameter adaptability of the seismic isolation devices.

[0003] Chinese patent CN117488969A discloses a vibration-controlled bearing; this design includes a combination structure of a laminated rubber seismic isolation bearing and a hydraulic seismic isolation bearing, which adjusts the bearing height by changing the volume of pressurized fluid. However, the piston plate has a fixed stroke range and cannot be adjusted specifically according to the seismic isolation displacement requirements of different buildings. Summary of the Invention

[0004] The purpose of this invention is to overcome the limitations of existing technologies in terms of the inability to adjust the working stroke and to provide a vibration isolation device and its adjustment method.

[0005] In a first aspect, the present invention provides a vibration isolation device, comprising: a first connecting bracket, a second connecting bracket, and a vibration isolation mechanism, wherein the two ends of the vibration isolation mechanism are respectively hinged to the first connecting bracket and the second connecting bracket, and there are two second connecting brackets, which are respectively located on both sides of the first connecting bracket;

[0006] The vibration isolation mechanism includes a vibration isolation cylinder. One end of the vibration isolation cylinder is hinged to the second connecting bracket. The vibration isolation cylinder includes a cylinder body and a piston rod. One end of the piston rod is slidably disposed in the cylinder body. The other end of the piston rod is provided with a connecting part. The piston rod is hinged to the first connecting bracket through the connecting part. The connecting part and the piston rod are integrally formed. The vibration isolation mechanism also includes a stop structure, which is disposed at one end of the cylinder body. The length of the stop structure is variable so that the piston rod has different ranges of movement in the axial direction.

[0007] Optionally, the vibration isolation mechanism further includes a hinge structure, the hinge structure further includes a first pin and a second pin, the connecting part is a connecting ring, a first spherical bearing is installed in the connecting ring, the first connecting bracket is provided with a first mounting hole, and the first pin passes through the first mounting hole and the inner ring of the first spherical bearing in sequence to connect the connecting ring and the first connecting bracket. The second connecting bracket has a second mounting hole, in which a second joint bearing is installed. One end of the vibration isolation cylinder is provided with a second pin, and the two ends of the second pin are respectively inserted into the inner ring of the second joint bearing to connect the vibration isolation cylinder and the second connecting bracket.

[0008] Optionally, the plurality of stop structures have different dimensions in the length direction, and one of the plurality of stop structures is selectively installed on the cylinder body to limit the different range of movement of the piston rod in the axial direction.

[0009] Optionally, the stop structure is a stop sleeve, the stop sleeve has a through hole, and the piston rod passes through the through hole; A stepped surface is formed on the piston rod, and a stop portion is formed in the through hole, wherein the stepped surface can abut against the stop portion.

[0010] Optionally, the stop sleeve includes a connected mounting portion and a sleeve portion, the mounting portion being located at one end of the sleeve portion, and the mounting portion being bolted to one end of the cylinder body near the stop sleeve. The through hole is formed inside the sleeve portion, and the sleeve portions of the plurality of stop sleeves have different lengths.

[0011] Optionally, the first connecting bracket includes a first support plate and a second support plate connected together. The first support plate and the second support plate are each provided with a first mounting hole on the side near the vibration isolation cylinder. A connecting plate is provided between the first support plate and the second support plate. The top surfaces of the first support plate, the second support plate and the connecting plate are used to connect to the top plate of the vibration isolation bearing. The second connecting bracket includes a third support plate and a fourth support plate. One end of the third support plate and the fourth support plate has a second mounting hole, and the other end of the third support plate and the fourth support plate is used to connect to the base plate of the seismic isolation bearing.

[0012] Optionally, the vibration isolation device further includes an accumulator, on which a first connection port and a second connection port are formed. The vibration isolation cylinder is connected to the first connection port through a pipeline, and the second connection port is used to connect to a hydraulic station. The energy accumulator includes an airbag, and a cavity is formed inside the energy accumulator. The cavity is connected to the first connection port and the second connection port respectively. The airbag is located inside the cavity, and the inflation port of the airbag is located outside the cavity.

[0013] In a second aspect, the present invention provides a seismic isolation system, including a seismic isolation bearing and the aforementioned seismic isolation device, wherein the seismic isolation bearing includes a top plate and a bottom plate spaced apart, a first connecting bracket connects to the top plate, and a second connecting bracket connects to the bottom plate.

[0014] In a third aspect, the present invention provides a method for adjusting a vibration isolation device, employing the aforementioned vibration isolation system, comprising: S1: Determine the seismic isolation index of the building in its current state, and based on the seismic isolation index of the building, determine the stiffness characteristics of the seismic isolation device; S2: Based on the stiffness characteristics of the vibration isolation device, determine the air pressure P1 of the airbag and the oil pressure P2 of the vibration isolation cylinder; S3: Inject gas into the airbag to create an air pressure P1 inside the airbag; S4: Inject hydraulic oil into the cavity of the accumulator so that the oil pressure in the accumulator and the vibration isolation cylinder is P1; S5: Based on the oil pressure of P1 in the accumulator and the vibration isolation cylinder, continue to inject hydraulic oil into the cavity so that the oil pressure in the accumulator and the vibration isolation cylinder is P2.

[0015] Optionally, continuing to inject hydraulic oil into the cavity includes: During the injection process, the injection rate and volume of hydraulic oil are adjusted to ensure that the oil pressure increases linearly. And / or, The adjustment method of the vibration isolation device also includes S41: Before injecting hydraulic oil into the cavity of the accumulator, connect the oil outlet of the hydraulic station to the second connection port of the accumulator through the pipeline. S51: After the oil pressure in the accumulator and the vibration isolation cylinder reaches P2, close the second connection port and remove the pipeline.

[0016] The above technical solution enables the use of seismic isolation devices and positive stiffness elements in parallel within seismic isolation bearings. This reduces the equivalent vertical stiffness of the bearings, lowers the natural frequency of the building structure to an ideal range, and isolates the vertical component of earthquakes. Furthermore, the integral molding of the connecting part and piston rod, compared to separate machining and subsequent connection, reduces the probability of deformation or even breakage at the connection point due to heavy load stress concentration, thus improving the overall structural strength of the seismic isolation device. Simultaneously, by altering the length of the stop structure, the piston rod's movement is restricted within different ranges, changing its elongation and adjusting the working range of the seismic isolation mechanism to ensure applicability under varying deformation requirements of the building structure. Attached Figure Description

[0017] Figure 1 This is a three-dimensional diagram of a seismic isolation device.

[0018] Figure 2 This is a three-dimensional view of the vibration isolation cylinder, showing the first joint bearing.

[0019] Figure 3 This is a three-dimensional view of the vibration isolation cylinder, showing the stepped surface.

[0020] Figure 4 A three-dimensional view of the stop structure.

[0021] Figure 5 This is a perspective view of the second connecting bracket, in which the second joint bearing is shown.

[0022] Figure 6 This is a side view of the seismic isolation bearing, in which the accumulator is shown.

[0023] Figure 7 This is a three-dimensional view of the seismic isolation bearing.

[0024] Figure 8 This is a scatter plot of the vertical resultant force for two connection methods, namely spherical bearing and pin connection, at the same displacement.

[0025] Figure 9 This is a flowchart of the adjustment method for the seismic isolation device.

[0026] Marked in the image: 10-Seismic isolation bearing, 101-Top plate, 102-Bottom plate, 100-Seismic isolation device, 1-First connecting bracket, 11-First support plate, 12-Second support plate, 13-Bearing support, 2-Second connecting bracket, 21-Third support plate, 22-Fourth support plate, 3-Seismic isolation mechanism, 31-Seismic isolation cylinder, 311-Cylinder body, 312-Piston rod, 3121-Connecting part, 3122-Step surface, 32-Stop structure, 321-Stop part, 322-Mounting part, 323-Sleeve part, 324-Through hole, 33-Hinged structure, 331-First pin, 332-Second pin, 333-First spherical bearing, 334-Second spherical bearing, 4-Accumulator; 41-First connecting port; 42-Second connecting port. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0028] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer," etc., used in the description of specific embodiments of the present invention to indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0029] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present invention.

[0030] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0031] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0032] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to connection methods commonly used in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0033] As a first aspect of the present invention, such as Figures 1 to 7 As shown, the present invention provides a vibration isolation device 100, including a first connecting bracket 1, a second connecting bracket 2, and a vibration isolation mechanism 3. There are two second connecting brackets 2, located on opposite sides of the first connecting bracket 1, and each second connecting bracket 2 is hinged to the first connecting bracket 1 via a different vibration isolation mechanism 3. The vibration isolation mechanism 3 includes a vibration isolation cylinder 31 and a stop structure 32. One end of the vibration isolation cylinder 31 is hinged to the second connecting bracket 2. The vibration isolation cylinder 31 includes a cylinder body 311 and a piston rod 312. One end of the piston rod 312 is slidably disposed within the cylinder body 311, and the other end of the piston rod 312 is provided with a connecting portion 3121. The piston rod 312 is hinged to the first connecting bracket 1 via the connecting portion 3121, and the connecting portion 3121 and the piston rod 312 are integrally formed. The vibration isolation mechanism 3 also includes a stop structure 32, which is disposed at one end of the cylinder body 311. The length of the stop structure 32 is variable, allowing the piston rod 312 to have different axial movement ranges.

[0034] During the use of the vibration isolation device 100, the vibration isolation cylinder 31 is filled with hydraulic oil at a set pressure, the piston is in the extended state, and the hydraulic cylinder is arranged horizontally or at a small angle. At this time, the thrust of the hydraulic cylinder is mainly along the horizontal direction, and the vertical component is small, so its influence on the vertical bearing capacity of the vibration isolation support 10 is negligible.

[0035] During an earthquake, the ground undulates vertically. When the foundation of a building structure moves downward, the base plate 102 of the seismic isolation bearing 10 drives the second connecting bracket 2 to move downward. Consequently, the seismic isolation cylinder 31 rotates downward around the hinge. Due to the hydraulic pressure inside the seismic isolation cylinder 31, the piston rod 312 remains extended, and the connecting part 3121 at the end of the piston rod 312 rotates upward around the hinge. At this time, the seismic isolation cylinder 31 changes from a horizontal state to an upward tilted state. The thrust generated by the internal hydraulic pressure produces an upward component force in the vertical direction, supporting the building structure above the seismic isolation bearing 10 to prevent the building structure above the seismic isolation bearing 10 from sinking.

[0036] As the vertical displacement increases, the tilt angle of the isolation cylinder 31 increases, and the vertical upward component of the force also increases, thereby providing an upward thrust in the vertical direction that is the same as the displacement direction, compensating for the reduction in the support force of the vertical positive stiffness element in the isolation bearing 10.

[0037] When the foundation of the building structure moves upward, the base plate 102 of the seismic isolation bearing 10 drives the second connecting bracket 2 to move upward, thereby causing the seismic isolation cylinder 31 to rotate upward around the hinge. At this time, the seismic isolation cylinder 31 changes from a horizontal state to a downward tilting state, and the thrust generated by the internal hydraulic pressure produces a downward component force in the vertical direction, preventing the foundation of the building structure below the seismic isolation bearing 10 from continuing to rise and preventing the building structure above the seismic isolation bearing 10 from moving accordingly.

[0038] As the vertical displacement increases, the tilt angle of the isolation cylinder 31 increases, and the vertical downward component of the force also increases, thereby providing a downward pulling force in the vertical direction that is the same as the displacement direction, which counteracts the increase in the supporting force of the vertical positive stiffness element in the isolation support 10.

[0039] The symmetrically arranged seismic isolation mechanisms 3 on both sides enable the seismic isolation device 100 to withstand seismic forces from different directions in the horizontal direction. When an earthquake occurs, the piston rods 312 of the seismic isolation cylinders 31 on both sides slide in their respective cylinder bodies 311, dissipating the seismic energy together and making the load evenly distributed on both sides. This improves the overall stability and load uniformity of the seismic isolation device 100, and is especially suitable for the requirement of symmetrical force distribution of the seismic isolation device 100 in heavy-load scenarios.

[0040] Under seismic loading, the piston rod 312 slides axially within the cylinder 311. The hydraulic oil within the cylinder 311 flows with the movement of the piston rod 312, connecting to the accumulator 4 via pipelines, generating an elastic restoring force. This dissipates seismic energy and adjusts the isolation stiffness. When the piston rod 312 reaches its preset stroke limit, the stop structure 32 axially restricts its movement, preventing overtravel and damage to the sealing structure. By changing the length of the stop structure 32, the effective stroke of the piston rod 312 can be adjusted without disassembling the entire isolation device 100, according to the seismic isolation displacement requirements of different buildings, thus achieving targeted setting of displacement for different isolation parameters.

[0041] Through the above technical solutions, when the seismic isolation device 100 and the positive stiffness element are used in parallel in the seismic isolation bearing 10, the equivalent vertical stiffness of the seismic isolation bearing 10 can be reduced, the natural frequency of the building structure can be reduced to an ideal range, and the vertical component of the earthquake can be isolated. Furthermore, the connection part 3121 and the piston rod 312 are integrally formed. Compared to the method of processing parts separately and then connecting them, this reduces the probability of deformation or even breakage at the connection point of the connection part 3121 and the piston rod 312 due to heavy load stress concentration, thus improving the overall structural strength of the seismic isolation device 100. Simultaneously, by changing the length of the stop structure 32, the movement of the piston rod 312 is restricted within different ranges, thereby changing the elongation of the piston rod 312 and adjusting the working range of the seismic isolation mechanism 3 to ensure applicability under different deformation requirements of the building structure.

[0042] Since this invention relates to the field of seismic isolation in building structures, which typically involves heavy loads, often reaching hundreds of tons, designing a seismic isolation device 100 for such weight necessitates considering how the device can maintain normal function while possessing sufficient structural strength. During the applicant's design process, such as... Figure 8 As shown, when the hinge structure 33 adopts the connection method of ear plate and pin, on the one hand, the load of the vibration isolation device 100 is heavy, and on the other hand, the friction between the ear plate and the pin is large. The friction between the ear plate and the pin affects the normal operation of the vibration isolation device 100, and even plastic deformation occurs.

[0043] To address the aforementioned issues and further enhance the structural strength of seismic isolation structures, alternatively, such as... Figures 1 to 5 As shown, the vibration isolation mechanism 3 also includes a hinge structure 33, which further includes a first pin 331 and a second pin 332. The connecting part 3121 is a connecting ring, in which a first spherical bearing 333 is installed. The first connecting bracket 1 is provided with a first mounting hole. The first pin 331 passes through the first mounting hole and the inner ring of the first spherical bearing 333 in sequence to connect the connecting ring and the first connecting bracket 1. The second connecting bracket 2 has a second mounting hole, in which a second spherical bearing 334 is installed. One end of the vibration isolation cylinder 31 is provided with a second pin 332, and both ends of the second pin 332 pass through the inner ring of the second spherical bearing 334 to connect the vibration isolation cylinder 31 and the second connecting bracket 2.

[0044] Since both the first joint bearing 333 and the second joint bearing 334 possess a certain range of angular self-adaptive capability, when the building structure deforms or installation deviations occur under heavy load conditions, the angular offset at the hinge point can be effectively compensated by the adaptive rotation of the joint bearings. This avoids lateral forces generated between the piston rod 312 and the cylinder 311 due to uneven load, reducing the risk of wear on the pin and connecting ring, as well as local stress concentration. Figure 8As shown, compared with the pin connection, the use of a spherical bearing reduces the vertical resultant force by about 30kN when the vibration isolation device 100 moves in the vertical direction, thus avoiding the impact of the frictional force between the pin and the lug on the normal operation of the vibration isolation device 100.

[0045] This invention does not limit the specific structure of the variable-length stop structure 32. The stop structure 32 can be an axially extendable structure or a replaceable structure. In one embodiment of this invention, there are multiple stop structures 32, each with different dimensions in the length direction. One of the multiple stop structures 32 is selectively installed on the cylinder body 311 to limit the different axial movement range of the piston rod 312. By replacing the stop structures 32 with different lengths, the effective stroke of the piston rod 312 can be adjusted without disassembling the entire vibration isolation device 100, thus meeting the displacement requirements of different buildings under different vibration isolation indicators.

[0046] Optionally, such as Figure 3 and Figure 4 As shown, the stop structure 32 is a stop sleeve with a through hole 324. The piston rod 312 passes through the through hole 324 and has a stepped surface 3122. A stop portion 321 is formed within the through hole 324. The stepped surface 3122 abuts against the stop portion 321, thereby providing mechanical limitation when the piston rod 312 reaches a preset stroke limit. The stepped surface 3122 and the stop portion 321 have a surface contact abutment relationship, which can withstand a large axial limiting force under heavy load conditions, preventing the piston rod 312 from overtraveling and damaging the sealing structure.

[0047] To ensure connection strength, optionally, such as Figure 4 As shown, the stop sleeve includes a connected mounting portion 322 and a sleeve portion 323. The mounting portion 322 is located at one end of the sleeve portion 323 and is bolted to the end of the cylinder body 311 near the stop sleeve. A through hole 324 is formed inside the sleeve portion 323. The sleeve portions 323 of multiple stop sleeves have different lengths. The mounting portion 322 is bolted to the cylinder body 311, which allows the stop sleeve to be easily removed and replaced from the cylinder body 311, and also increases the connection strength between the stop sleeve and the cylinder body 311.

[0048] The length of the sleeve portion 323 determines the maximum stroke that the piston rod 312 can extend. The longer the sleeve portion 323 is, the greater the range of motion of the piston rod 312. The shorter the sleeve portion 323 is, the smaller the range of motion of the piston rod 312. Depending on the actual engineering needs, stop sleeves of different lengths can be installed on the cylinder body 311.

[0049] It is understood that, without altering the core structural mechanism described above, the stop structure 32 is not limited to the specific form of the stop sleeve, as long as it can be detachably installed on the cylinder body 311 and can form an axial abutment and limiting relationship with the stepped surface 3122 on the piston rod 312. The spherical bearing in the hinge structure 33 is not limited to a specific model, as long as it can provide an angular compensation fit between the first pin 331 or the second pin 332 and the corresponding mounting hole. Where there is no conflict, the technical features of the foregoing embodiments can be combined with each other.

[0050] Optionally, such as Figure 1 As shown, the first connecting bracket 1 includes a first support plate 11 and a second support plate 12 connected together. Both the first support plate 11 and the second support plate 12 have first mounting holes on the side near the vibration isolation cylinder 31. A connecting plate is provided between the first support plate 11 and the second support plate 12. The top surfaces of the first support plate 11, the second support plate 12, and the connecting plate are used to connect to the top plate 101 of the vibration isolation bearing 10. The second connecting bracket 2 includes a third support plate 21 and a fourth support plate 22. One end of both the third support plate 21 and the fourth support plate 22 has a second mounting hole, and the other end of both is used to connect to the bottom plate 102 of the vibration isolation bearing 10.

[0051] The first support plate 11 and the second support plate 12 are parallel to each other and spaced apart. The first pin 331 passes through the first mounting hole on the first support plate 11 and the inner ring of the first spherical bearing 333 in the connecting ring, thereby clamping and fixing the connecting ring to the first support plate 11. The third support plate 21 and the fourth support plate 22 are parallel to each other and spaced apart. The end of the vibration isolation cylinder 31 near the second connecting bracket 2 is located between the third support plate 21 and the fourth support plate 22. The two ends of the second pin 332 pass through the inner rings of the second spherical bearing 334 in the second mounting hole on the third support plate 21 and the second mounting hole on the fourth support plate 22, respectively, thereby clamping and fixing the end of the vibration isolation cylinder 31 between the third support plate 21 and the fourth support plate 22.

[0052] The double-plate clamping structure allows the load at the hinge point to be borne by the two support plates, effectively dispersing the shear force on the pin. The connecting plate is connected between the first support plate 11 and the second support plate 12, which enhances the overall rigidity of the first connecting bracket 110 and improves the load-bearing reliability and stability of the hinge connection under heavy load conditions.

[0053] Optionally, such as Figure 1As shown, the hinge structure 33 also includes a bearing support 13, which is disposed on the side of the first support plate 11 and the second support plate 12 near the vibration isolation cylinder 31. A third joint bearing is installed in the bearing support 13. The first pin 331 can be hinged to the connecting part 3121 and the first connecting bracket 1 by connecting the first joint bearing 333 and the third joint bearing. The joint bearings are installed in both mounting holes of the first pin 331, which can further reduce the friction force during the operation of the hinge structure 33, thereby improving the vibration isolation effect of the vibration isolation device 100 and preventing the vibration isolation device 100 from deforming due to heavy load.

[0054] To ensure the normal operation of the vibration isolation cylinder 31, optionally, such as Figure 6 and Figure 7 As shown, the vibration isolation device 100 also includes an accumulator 4, which has a first connection port 41 and a second connection port 42. The vibration isolation cylinder 31 is connected to the first connection port 41 via a pipeline, and the second connection port 42 is used to connect to a hydraulic station. The accumulator 4 includes an air bladder, and a cavity is formed inside the accumulator 4. The cavity is connected to the first connection port 41 and the second connection port 42 respectively. The air bladder is located inside the cavity, and the inflation port of the air bladder is located outside the cavity.

[0055] The airbag is filled with gas at a certain pressure, and the cavity is filled with hydraulic oil. When the isolation cylinder 31 is displaced under seismic action, the piston rod 312 slides within the cylinder body 311. The hydraulic oil in the cylinder body 311 is connected to the cavity of the accumulator 4 through a pipeline. The airbag is compressed or expanded by the hydraulic oil, generating an elastic restoring force, thereby providing adjustable hydraulic pressure to the isolation cylinder 31. The accumulator 4 has both elastic energy storage and hydraulic transmission functions. By adjusting the airbag pressure and the hydraulic oil pressure, the equivalent stiffness of the isolation cylinder 31 can be flexibly adjusted to meet the seismic isolation requirements of different heavy-load building scenarios.

[0056] As a second aspect of the invention, such as Figure 6 and Figure 7 As shown, the present invention provides a seismic isolation system, including a seismic isolation bearing 10 and the aforementioned seismic isolation device 100. The seismic isolation bearing 10 includes a top plate 101 and a bottom plate 102 spaced apart. A first connecting bracket 1 is connected to the top plate 101, and a second connecting bracket 2 is connected to the bottom plate 102.

[0057] The seismic isolation device 100 can be part of the seismic isolation bearing 10 and connected in parallel with the positive stiffness element of the seismic isolation bearing 10. That is, the seismic isolation bearing 10 can include a top plate 101, a bottom plate 102 and a positive stiffness element. The positive stiffness element and the seismic isolation mechanism 3 are arranged between the top plate 101 and the bottom plate 102. The first connecting bracket 1 of the seismic isolation device 100 is connected to the top plate 101, and the second connecting bracket 2 is connected to the bottom plate 102. Both ends of the positive stiffness element are also connected to the top plate 101 and the bottom plate 102. The top plate 101 and the bottom plate 102 of the seismic isolation bearing 10 are respectively used to connect with the building structure and the foundation.

[0058] As a third aspect of the present invention, such as Figure 9 As shown, the present invention provides an adjustment method for a seismic isolation device 100, employing the above-mentioned seismic isolation system, comprising: S1: Determine the seismic isolation index of the building in its current state, and based on the seismic isolation index of the building, determine the stiffness characteristics of the seismic isolation device 100. S2: Based on the stiffness characteristics of the vibration isolation device 100, determine the air pressure P1 of the airbag and the oil pressure P2 of the vibration isolation cylinder 31. S3: Inject gas into the airbag to create an air pressure P1 inside the airbag; S4: Inject hydraulic oil into the cavity of accumulator 4 so that the oil pressure in accumulator 4 and vibration isolation cylinder 31 is P1; S5: Based on the oil pressure of P1 in the accumulator 4 and the vibration isolation cylinder 31, continue to inject hydraulic oil into the cavity so that the oil pressure in the accumulator 4 and the vibration isolation cylinder 31 is P2.

[0059] By employing a method of first injecting air and then injecting oil in stages, the stiffness characteristics of the seismic isolation device 100 can be precisely set according to the actual seismic isolation indicators of the building, enabling targeted parameter configuration for different heavy-load building scenarios. These seismic isolation indicators can include parameters such as the seismic isolation period and the horizontal damping coefficient. Technicians can comprehensively determine the target stiffness characteristics based on factors such as the building's structural type, number of stories, and weight.

[0060] P2 is greater than P1, and the difference between the two corresponds to the degree of compression of the air bladder by the hydraulic oil. The larger the difference, the more the air bladder is compressed, and the higher the equivalent stiffness of the vibration isolation cylinder 31. Inflation is performed through the air bladder's inflation port, which is located outside the cavity, making operation convenient and not affecting the hydraulic oil circuit inside the accumulator 4.

[0061] Optionally, continuing to inject hydraulic oil into the cavity includes adjusting the injection rate and volume of the hydraulic oil during the injection process to ensure a linear increase in oil pressure. This linear pressure increase control method avoids sudden pressure changes that could impact the vibration-damping cylinder 31 and the pipeline, protecting the integrity of the sealing structure and pipeline joints, and improving the safety of the adjustment process. Simultaneously, this adjustment method allows for stepless adjustment of the oil pressure, thereby enhancing the flexibility of the adjustment.

[0062] Optionally, the adjustment method for the seismic isolation device 100 also includes, S41: Before injecting hydraulic oil into the cavity of accumulator 4, connect the oil outlet of the hydraulic station to the second connection port 42 of accumulator 4 through the pipeline. S51: After the oil pressure in the accumulator 4 and the vibration isolation cylinder 31 reaches P2, close the second connection port 42 and remove the pipeline.

[0063] Step S41 is performed before injecting hydraulic oil in S4. The oil outlet of the hydraulic station is connected to the second connection port 42 of the accumulator 4 through a pipeline to establish a hydraulic oil injection channel. Step S51 is performed after the oil pressure in the accumulator 4 and the vibration isolation cylinder 31 reaches P2 in S5. The second connection port 42 is closed and the pipeline is removed.

[0064] Steps S41 and S51 ensure the proper establishment and closure of the hydraulic oil injection channel. After the oil pressure reaches P2, the hydraulic station is disconnected, allowing the vibration isolation device 100 to work independently under the set air pressure P1 and oil pressure P2 without the need for continuous connection to the hydraulic station, thus reducing operation and maintenance costs.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vibration isolation device, characterized in that, include: The first connecting bracket (1), the second connecting bracket (2), and the vibration isolation mechanism (3) are respectively hinged to the first connecting bracket (1) and the second connecting bracket (2) at both ends. There are two second connecting brackets (2), which are located on both sides of the first connecting bracket (1). The vibration isolation mechanism (3) includes a vibration isolation cylinder (31), one end of which is hinged to the second connecting bracket (2). The vibration isolation cylinder (31) includes a cylinder body (311) and a piston rod (312). One end of the piston rod (312) is slidably disposed in the cylinder body (311), and the other end of the piston rod (312) is provided with a connecting part (3121). The piston rod (312) is hinged to the first connecting bracket (1) through the connecting part (3121). The connecting part (3121) and the piston rod (312) are integrally formed. The vibration isolation mechanism (3) further includes a stop structure (32), which is disposed at one end of the cylinder (311). The length of the stop structure (32) is variable so that the piston rod (312) has different ranges of movement in the axial direction.

2. The vibration isolation device according to claim 1, characterized in that, The vibration isolation mechanism (3) further includes a hinge structure (33), the hinge structure (33) further includes a first pin (331) and a second pin (332), the connecting part (3121) is a connecting ring, a first spherical bearing (333) is installed in the connecting ring, the first connecting bracket (1) is provided with a first mounting hole, and the first pin (331) passes through the first mounting hole and the inner ring of the first spherical bearing (333) in sequence to connect the connecting ring and the first connecting bracket (1). The second connecting bracket (2) has a second mounting hole, and a second joint bearing (334) is installed in the second mounting hole. One end of the vibration isolation cylinder (31) is provided with a second pin (332). The two ends of the second pin (332) are respectively inserted into the inner ring of the second joint bearing (334) to connect the vibration isolation cylinder (31) and the second connecting bracket (2).

3. The vibration isolation device according to claim 1, characterized in that, There are multiple stop structures (32), and the multiple stop structures (32) have different dimensions in the length direction. One of the multiple stop structures (32) is installed on the cylinder body (311) so that the piston rod (312) has different ranges of movement in the axial direction.

4. The vibration isolation device according to claim 3, characterized in that, The stop structure (32) is a stop sleeve, and a through hole (324) is formed on the stop sleeve. The piston rod (312) passes through the through hole (324). A stepped surface (3122) is formed on the piston rod (312), and a stop portion (321) is formed in the through hole (324). The stepped surface (3122) can abut against the stop portion (321).

5. The vibration isolation device according to claim 4, characterized in that, The stop sleeve includes a connected mounting part (322) and a sleeve part (323). The mounting part (322) is located at one end of the sleeve part (323). The mounting part (322) is bolted to one end of the cylinder body (311) near the stop sleeve. The through hole (324) is formed in the sleeve portion (323), and the sleeve portions (323) of the plurality of stop sleeves have different lengths.

6. The vibration isolation device according to claim 2, characterized in that, The first connecting bracket (1) includes a first support plate (11) and a second support plate (12) connected together. The first support plate (11) and the second support plate (12) are provided with a first mounting hole on the side near the vibration isolation cylinder (31). A connecting plate is provided between the first support plate (11) and the second support plate (12). The top surfaces of the first support plate (11), the second support plate (12) and the connecting plate are used to connect the top plate (101) of the vibration isolation support (10). The second connecting bracket (2) includes a third support plate (21) and a fourth support plate (22). One end of the third support plate (21) and the fourth support plate (22) has a second mounting hole, and the other end of the third support plate (21) and the fourth support plate (22) is used to connect to the base plate (102) of the seismic isolation bearing (10).

7. The vibration isolation device according to any one of claims 1-5, characterized in that, The vibration isolation device (100) further includes an accumulator (4), on which a first connection port (41) and a second connection port (42) are formed. The vibration isolation cylinder (31) is connected to the first connection port (41) through a pipeline, and the second connection port (42) is used to connect to a hydraulic station. The accumulator (4) includes an airbag, and a cavity is formed inside the accumulator (4). The cavity is connected to the first connection port (41) and the second connection port (42) respectively. The airbag is located inside the cavity, and the inflation port of the airbag is located outside the cavity.

8. A seismic isolation system, characterized in that, It includes a seismic isolation bearing (10) and a seismic isolation device (100) according to any one of claims 1-7. The seismic isolation bearing (10) includes a top plate (101) and a bottom plate (102) spaced apart. The first connecting bracket (1) is connected to the top plate (101), and the second connecting bracket (2) is connected to the bottom plate (102).

9. A method for adjusting a vibration isolation device, characterized in that, The seismic isolation system according to claim 8 comprises: S1: Determine the seismic isolation index of the building in its current state, and based on the seismic isolation index of the building, determine the stiffness characteristics of the seismic isolation device (100); S2: Based on the stiffness characteristics of the vibration isolation device (100), determine the air pressure P1 of the airbag and the oil pressure P2 of the vibration isolation cylinder (31); S3: Inject gas into the airbag to create an air pressure P1 inside the airbag; S4: Inject hydraulic oil into the cavity of the accumulator (4) so ​​that the oil pressure in the accumulator (4) and the vibration isolation cylinder (31) is P1; S5: Based on the oil pressure of P1 in the accumulator (4) and the vibration isolation cylinder (31), continue to inject hydraulic oil into the cavity so that the oil pressure in the accumulator (4) and the vibration isolation cylinder (31) is P2.

10. The adjustment method of the vibration isolation device according to claim 9, characterized in that, The step of continuing to inject hydraulic oil into the cavity includes: during the injection process, adjusting the injection rate and injection volume of the hydraulic oil to make the oil pressure increase linearly; And / or, The adjustment method of the vibration isolation device (100) also includes, S41: Before injecting hydraulic oil into the cavity of the accumulator (4), connect the oil outlet of the hydraulic station to the second connection port (42) of the accumulator (4) through the pipeline; S51: After the oil pressure in the accumulator (4) and the vibration isolation cylinder (31) reaches P2, close the second connection port (42) and remove the pipeline.

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