A seismic isolation support with air damping tube

Abstract

The present invention provides a seismic isolation bearing with an air damping tube, comprising a middle seat plate, an upper seat plate, a lower seat plate and at least two air damping tubes, the upper seat plate is arranged on the middle seat plate and the plane in contact between the two forms a plane friction pair, a plurality of air damping tubes are evenly distributed between the upper seat plate and the middle seat plate, and one end of the air damping tube is connected to the upper seat plate and the other end is connected to the middle seat plate, the friction coefficient of the plane in contact between the middle seat plate and the upper seat plate gradually increases from the center of the plane to the periphery of the plane; the middle seat plate is arranged on the lower seat plate and a spherical friction pair is formed between the two. The use of the seismic isolation bearing of the present invention will not cause a significant rise in the beam body, and the bearing can be reset after the earthquake by a spring to reduce the residual displacement; the combination of the change in the friction coefficient on the plane in contact between the middle seat plate and the upper seat plate and the air damping tube makes the seismic isolation effect of the seismic isolation bearing of the present invention relatively evenly distributed in space, which can better play the role of seismic isolation.

Description

Technical Field

[0001] The invention relates to the technical field of supports, and in particular to a seismic isolation support with an air damping tube. Background Art

[0002] Earthquakes are sudden natural disasters. my country is located in the Pacific Rim and the Eurasian Belt, two major earthquake-prone areas, and is an earthquake-prone country. In order to prevent earthquakes from causing huge losses to people's lives and property, at present, engineering structures often take seismic isolation measures to reduce the losses caused by earthquakes to engineering structures.

[0003] In bridge engineering, the use of seismic isolation bearings can economically and effectively reduce the damage to bridge structures caused by earthquakes. Currently, the seismic isolation bearings used in bridges include lead rubber bearings, hyperbolic spherical bearings, friction pendulum bearings, liquid damping bearings, etc. The problems existing in various bearings are as follows:

[0004] 1. Lead rubber bearings mainly rely on the energy dissipation of the lead core to achieve seismic isolation, but the presence of lead can easily cause damage to the environment.

[0005] 2. Although hyperbolic spherical bearings and friction pendulum bearings can dissipate energy through friction, their periods are fixed and may cause resonance. Moreover, the seismic displacement is often large. The relative movement under an earthquake will cause a significant lifting of the beam, causing the bearing to fail.

[0006] 3. The sealing of the liquid damping bearing is poor and there is oil leakage.

[0007] In summary, there is an urgent need for a seismic isolation bearing with an air damping tube to solve the problems existing in the prior art. Summary of the invention

[0008] The purpose of the present invention is to provide a seismic isolation bearing with an air damping tube, and the specific technical solution is as follows:

[0009] A seismic isolation bearing with an air damping tube comprises a middle seat plate, an upper seat plate and at least two air damping tubes, wherein the upper seat plate is arranged on the middle seat plate and the plane in contact between the two forms a plane friction pair, a plurality of air damping tubes are evenly distributed between the upper seat plate and the middle seat plate, and one end of the air damping tube is connected to the upper seat plate and the other end is connected to the middle seat plate, and the friction coefficient of the contact plane between the middle seat plate and the upper seat plate gradually increases from the center of the plane to the periphery of the plane.

[0010] Preferably, the above technical solution also includes a lower seat plate, the middle seat plate is arranged on the lower seat plate, and at the contact position between the two, the middle seat plate is provided with a spherical outer convex surface, and the lower seat plate is provided with a spherical inner concave surface, the spherical outer convex surface and the spherical inner concave surface are matched with each other and the two form a spherical friction pair, thereby realizing relative rotation between the middle seat plate and the lower seat plate.

[0011] Preferably, the above technical solution also includes an elastic member, a through hole is vertically provided in the center of the plane of the middle seat plate, the elastic member is vertically arranged in the through hole, and one end of the elastic member is connected to the surface center of the spherical inner concave surface of the lower seat plate, and the other end is connected to the center position of the plane on the upper seat plate that contacts the middle seat plate.

[0012] Preferably in the above technical solution, a blind hole is provided at the center of the contact plane between the upper seat plate and the middle seat plate, and both ends of the elastic member are respectively connected to the inner wall of the blind hole and the surface center of the spherical inner concave surface through a first fixer.

[0013] Preferably in the above technical solution, the elastic member is a spring.

[0014] Preferably, the above technical solution further includes a limiting ring and at least three pins, wherein the limiting ring is arranged on the middle seat plate and the center of the limiting ring and the center of the contact plane between the middle seat plate and the upper seat plate are located on the same axis, and a plurality of the pins are arranged on the middle seat plate along the outer diameter circumference of the limiting ring to limit the limiting ring;

[0015] The upper seat plate is a cylinder, the lower end of the upper seat plate is arranged in a limiting ring, and the inner diameter of the limiting ring is greater than or equal to the outer diameter of the upper seat plate.

[0016] Preferably in the above technical solution, the pin is vertically arranged on the middle seat plate, and a shear ring is also provided on the pin, so that the pin can be sheared by the shear ring when it is impacted.

[0017] Preferably in the above technical solution, a cylindrical cavity is provided on the middle seat plate, the upper seat plate is arranged in the cavity, a middle seat plate buffer pad is provided on the inner wall of the cavity, and an upper seat plate buffer pad is also provided on the outer wall of the upper seat plate.

[0018] Preferably in the above technical solution, an annular mounting groove is provided in the middle of the upper seat plate, one end of the air damping tube is connected to the inner wall of the cavity through a second fixture, and the other end is connected to the inner wall of the mounting groove through a third fixture.

[0019] Preferably in the above technical solution, the second fixer is a semicircular hook, which is arranged on the inner wall of the cavity, and the third fixer includes two connecting blocks and a connecting rod, the two connecting blocks are arranged in the installation groove, and the two connecting blocks are respectively arranged at both ends of the connecting rod to form an I-shaped structure, and one end of the air damping tube is connected to the connecting rod.

[0020] The application of the technical solution of the present invention has the following beneficial effects:

[0021] (1) The seismic isolation bearing with air damping tube of the present invention comprises a lower seat plate, a middle seat plate, an upper seat plate and an air damping tube, a plane friction pair is formed between the middle seat plate and the upper seat plate and the two are connected by the air damping tube, a spherical friction pair is formed between the lower seat plate and the middle seat plate, and a through hole is provided between the middle seat plate to install a spring, and the lower seat plate and the upper seat plate are vertically connected by the spring; the movement of the beam body on the horizontal plane is achieved by the plane friction pair, and the rotation of the beam body is achieved by the spherical friction pair. When the seismic isolation bearing with air damping tube of the present invention is used, the main beam will basically not be significantly raised when the bridge encounters an earthquake.

[0022] (2) The seismic isolation support with air damping tube of the present invention is provided with a spring. As the relative displacement between the upper seat plate and the lower seat plate increases, the spring stiffness will change, so that the horizontal stiffness of the seismic isolation support is a variable value, thereby avoiding the occurrence of resonance. At the same time, the change in the friction coefficient of the contact plane between the middle seat plate and the upper seat plate can realize the reset of the seismic isolation support after an earthquake (or after the seismic isolation support is offset) to reduce the residual displacement; at the same time, the spring can connect the upper seat plate, the middle seat plate and the lower seat plate to avoid the separation of the seat plates in vertical earthquakes.

[0023] (3) The seismic isolation bearing with air damping tube of the present invention has a through hole vertically arranged in the center of the plane of the middle seat plate. The through hole is conducive to the self-resetting of the spherical friction pair. Since the center of the spherical outer convex surface and the center of the spherical inner concave surface are close to the plane, and the spherical friction pair is self-reset by gravity, when the swing displacement between the middle seat plate and the lower seat plate is large, the gravitational potential energy will also be large, and when the swing displacement between the middle seat plate and the lower seat plate is small, the gravitational potential energy will also be small. Therefore, when the middle seat plate and the lower seat plate are about to be completely reset (or when the displacement is very small), the effect of gravity is very small, and the two planes on the spherical outer convex surface and the spherical inner concave surface are in contact with each other and it will be difficult to completely reset without the effect of gravity. The vertical through hole arranged in the center of the plane of the middle seat plate can remove the center plane of the spherical outer convex surface, thereby avoiding the problem of difficulty in resetting when it is about to be completely reset.

[0024] (4) The seismic isolation bearing with air damping tube of the present invention is provided with a shear ring on the pin. When the impact on the pin (mainly caused by earthquake) is greater than the design strength of the pin, the pin will be sheared off from the shear ring, so that the upper seat plate can have a larger friction displacement, so as to better realize friction energy dissipation.

[0025] (5) The seismic isolation support with air damping tube of the present invention is provided with a middle seat cushion and an upper seat cushion. The provision of the cushion can prevent the upper seat and the middle seat from colliding hard and fast and realize the seismic isolation function, prevent the seismic isolation support from being damaged, and reduce the damage caused by earthquakes.

[0026] (6) The friction coefficient of the contact plane between the middle seat plate and the upper seat plate of the seismic isolation bearing with air damping tube of the present invention gradually increases from the center of the plane to the periphery of the plane. At the center of the contact plane between the middle seat plate and the upper seat plate, the friction coefficient is the smallest, the friction force is the smallest, the movement speed between the middle seat plate and the upper seat plate is the largest, and the impedance force is the largest; around the contact plane between the middle seat plate and the upper seat plate, the friction coefficient is the largest, the friction force is the largest, the movement speed between the middle seat plate and the upper seat plate is the smallest, and the impedance force is the smallest. This combination of the change in the friction coefficient on the contact plane between the middle seat plate and the upper seat plate and the air damping tube makes the seismic isolation effect of the bearing of the present invention relatively uniformly distributed in space, can better play the role of seismic isolation, and is conducive to self-reset after earthquake.

[0027] (7) The seismic isolation bearing with air damping tubes of the present invention can set the number of air damping tubes according to actual conditions. The air damping tubes avoid the oil leakage of conventional viscous damping tubes, and the damping medium of the air damping tubes is air, which has low cost and long service life. In addition, the present invention can adjust the damping ratio by adjusting the number of damping tubes.

[0028] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 is a cross-sectional view of the seismic isolation support of the present invention;

[0031] Figure 2 It is an axonometric view of the seismic isolation support of the present invention;

[0032] Figure 3 yes Figure 1 Schematic diagram of the structure of the air damping tube;

[0033] Figure 4 yes Figure 1 A partial enlarged view of the middle A;

[0034] Among them, 1. lower seat plate, 2. spring, 3. first fixer, 4. spherical friction pair, 5. middle seat plate, 6. middle seat plate buffer pad, 7. air damping tube, 7.1. second fixer, 7.2. third fixer, 8. upper seat plate buffer pad, 9. upper seat plate, 10. plane friction pair, 11. limit ring, 12. pin, 12.1. shear ring, 13. mounting groove. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0036] Embodiment 1:

[0037] See also Figures 1 to 4 A seismic isolation bearing with an air damping tube, specifically a seismic isolation bearing for supporting a bridge, includes a middle seat plate 5, an upper seat plate 9 and at least two air damping tubes 7, the upper seat plate 9 is arranged on the middle seat plate 5 and the plane in contact between the two forms a plane friction pair 10, a plurality of the air damping tubes 7 are evenly distributed between the upper seat plate 9 and the middle seat plate 5, and one end of the air damping tube 7 is connected to the upper seat plate 9, and the other end is connected to the middle seat plate 5, and the friction coefficient of the contact plane between the middle seat plate 5 and the upper seat plate 9 gradually increases from the center of the plane to the periphery of the plane.

[0038] Preferably, the number of the air damping tubes is at least three, and the air damping tubes are evenly arranged between the upper seat plate and the middle seat plate to enable the upper seat plate to slide arbitrarily on the plane. When the number of the air damping tubes is two, only the upper seat plate can perform linear reciprocating motion.

[0039] See also Figure 2 The air damping tubes 7 are evenly arranged in 8 pieces. For different usage conditions, the number of air damping tubes should be set according to actual conditions.

[0040] Here we explain the impedance characteristics of the air damper tube. Under normal use, when the relative displacement speed of the upper seat plate and the middle seat plate is slow, the impedance generated by the air damper tube is very small; when the relative displacement speed of the upper seat plate and the middle seat plate is fast (such as in an earthquake), the air damper tube can generate a large impedance. (It is generally believed that the relationship between impedance and speed is: F = CV α , where C is the damping coefficient, V is the relative speed between the middle seat plate and the upper seat plate, and α is the damping index. Depending on the damping, the value of α will also be different)

[0041] The change of the friction coefficient can be achieved by selecting the material of the contact surface and controlling the surface roughness of the contact plane on the center seat plate.

[0042] At the center of the contact plane between the middle seat plate and the upper seat plate, the friction coefficient is the smallest, the friction force is the smallest, the movement speed between the middle seat plate and the upper seat plate is the largest, and the impedance force is the largest; around the contact plane between the middle seat plate and the upper seat plate, the friction coefficient is the largest, the friction force is the largest, the movement speed between the middle seat plate and the upper seat plate is the smallest, and the impedance force is the smallest. This combination of the change in the friction coefficient on the contact plane between the middle seat plate and the upper seat plate and the air damping tube makes the seismic isolation effect of the support of the present invention relatively uniformly distributed in space, and is also conducive to self-reset after earthquake.

[0043] The seismic isolation bearing with air damping tube also includes a lower seat plate 1, and the middle seat plate 5 is arranged on the lower seat plate 1. At the contact position between the two, the middle seat plate 5 is provided with a spherical outer convex surface, and the lower seat plate 1 is provided with a spherical inner concave surface. The spherical outer convex surface is matched with the spherical inner concave surface and the two form a spherical friction pair 4, so as to realize relative rotation between the middle seat plate and the lower seat plate. Preferably, the friction coefficient of the spherical friction pair is uniformly distributed.

[0044] The sliding displacement of the bridge on the horizontal plane is satisfied by the planar friction pair between the upper seat plate and the middle seat plate, and the rotational displacement of the bridge is satisfied by the spherical friction pair between the middle seat plate and the lower seat plate.

[0045] The seismic isolation bearing with air damping tube also includes an elastic member, a through hole is vertically provided in the center of the plane of the middle seat plate 5, the elastic member is vertically arranged in the through hole, and one end of the elastic member is connected to the surface center of the spherical inner concave surface of the lower seat plate 1, and the other end is connected to the center position of the plane on the upper seat plate 9 that contacts the middle seat plate 5.

[0046] A blind hole is provided at the center of the contact plane between the upper seat plate 9 and the middle seat plate 5 , and both ends of the elastic member are connected to the inner wall of the blind hole and the surface center of the spherical inner concave surface respectively through the first fixer 3 .

[0047] See also Figure 1 The first fixture is a commonly used structure of window wind hooks in the prior art and can be purchased directly. The first fixture is directly fixed on the upper seat plate and the lower seat plate through threads.

[0048] Preferably, the elastic member is a spring 2. The spring can be provided so that as the relative displacement between the upper seat plate and the lower seat plate increases, the spring stiffness changes, so that the horizontal stiffness of the seismic isolation support is a variable value, thereby avoiding the occurrence of resonance. At the same time, the change in the friction coefficient of the contact plane between the middle seat plate and the upper seat plate can realize the reset of the seismic isolation support after an earthquake (or after the seismic isolation support is offset) to reduce the residual displacement.

[0049] When the upper seat plate and the middle seat plate undergo relative displacement (for example, after an earthquake), the relative speed between the upper seat plate and the middle seat plate is zero, and the relative displacement is maximum. At this time, the elongation of the spring is maximum, and the restoring force generated is also maximum; the relative speed is zero, and the impedance force is zero. At this time, the spring force can reset the support as long as it overcomes the friction force (although the relative movement of the upper seat plate and the middle seat plate will generate impedance force during the recovery process, the impedance force can be ignored because the movement speed during the recovery process is very small).

[0050] In addition, when designing the through hole on the middle seat plate, the size or shape of the through hole should be considered. It is necessary to ensure that when the upper seat plate and the middle seat plate have the maximum displacement, the spring will not interfere with the upper seat plate or the middle seat plate after bending, that is, the through hole has enough space to accommodate the bending deformation of the spring.

[0051] The seismic isolation bearing with air damping tube also includes a limiting ring 11 and at least three pins 12. The limiting ring 11 is arranged on the contact plane between the middle seat plate 5 and the upper seat plate 9, and the center of the limiting ring 11 and the center of the contact plane between the middle seat plate 5 and the upper seat plate 9 are located on the same axis. A plurality of the pins 12 are arranged on the middle seat plate 5 along the outer diameter circumference of the limiting ring 11 to limit the limiting ring 11.

[0052] The upper seat plate 9 is a cylinder, and the lower end of the upper seat plate 9 is arranged in a limiting ring 11 . The inner diameter of the limiting ring 11 is greater than or equal to the outer diameter of the upper seat plate 9 .

[0053] The pin 12 is vertically arranged on the middle seat plate 5 (specifically, vertically inserted into the pin hole on the middle seat plate), and a shear ring 12.1 is also arranged on the pin 12, through which the pin 12 is sheared by impact, and the shear ring is an annular groove on the surface of the pin.

[0054] When the impact on the pin (mainly caused by earthquakes) is greater than the design strength of the pin, the pin will be sheared off from the shear ring, so that the upper seat plate can have a larger friction displacement to better achieve friction energy dissipation.

[0055] The limiting ring is used to limit the translational displacement of the upper seat plate. When the inner diameter of the limiting ring is the same as the diameter of the upper seat plate (specifically the diameter of the lower end of the upper seat plate), the seismic isolation bearing of the present invention is a fixed bearing (that is, under the action of the limiting ring, the upper seat plate cannot move freely in the limiting ring and can only move after the pin is sheared off); when the inner diameter of the limiting ring is larger than the diameter of the upper seat plate, the seismic isolation bearing is a movable bearing (the upper seat plate has a certain movable space in the limiting ring when the pin is not sheared off).

[0056] The middle seat plate 5 is provided with a cylindrical cavity, the upper seat plate 9 is arranged in the cavity, the inner wall of the cavity is provided with a middle seat plate buffer pad 6, and the outer wall of the upper seat plate 9 (specifically, the outer wall at the upper end of the upper seat plate) is also provided with an upper seat plate buffer pad 8. The buffer pad can prevent the upper seat plate from a very fast hard collision with the middle seat plate, and prevent the seismic isolation bearing from being damaged.

[0057] An annular mounting groove 13 is provided in the middle of the upper seat plate 9. One end of the air damping tube 7 is connected to the inner wall of the cavity through a second fixture 7.1, and the other end is connected to the inner wall of the mounting groove 13 through a third fixture 7.2.

[0058] The second fixer 7.1 is a semicircular hook, which is arranged on the inner wall of the cavity. The third fixer 7.2 includes two connecting blocks and a connecting rod. The two connecting blocks are arranged in the installation groove 13. The two connecting blocks are respectively arranged at both ends of the connecting rod to form an I-shaped structure. One end of the air damping tube 7 is connected to the connecting rod.

[0059] The hook on the air damping tube 7 cooperates with the semicircular hook to achieve hooking, and the hook on the air damping tube hooks the connecting rod to achieve connection with the third fixer.

[0060] The working principle of the seismic isolation bearing of the present invention is:

[0061] Under normal use, the upper seat plate is restricted in the limit ring and can slide on the plane friction pair of the middle seat plate, and the middle seat plate can rotate on the spherical friction pair of the lower seat plate. Because the sliding speed of the upper seat plate is very slow and the displacement is small under normal use (mainly due to the effect of temperature or the influence of bridge driving, which will cause relative displacement between the upper seat plate and the middle seat plate of the support, the speed of relative displacement is very small and the value of relative displacement is not large), the impedance force generated by the air damping tube is very small, so as to achieve the displacement requirement of the support under normal use;

[0062] In the case of an earthquake, the pins of the fixed limit ring are sheared off, and the earthquake energy received by the bridge is mainly consumed by plane friction and air damping tubes. When the middle seat plate and the upper seat plate are in contact with the center of the plane, the impedance of the air damping tube is the largest, which is used to compensate for the defect of insufficient energy consumption at the plane friction pair; when the middle seat plate and the upper seat plate are in contact with the edge of the plane, the friction force is very large, which is used to compensate for the defect of insufficient energy consumption of the air damping tube at the maximum displacement. After an earthquake, due to the presence of vertical springs and spherical friction pairs, the bearing can realize the function of automatic reset.

[0063] The technical solution of this embodiment is specifically:

[0064] After the seismic isolation bearing of the present invention is assembled, the lower end surface of the lower seat plate is placed on the support pad stone of the pier, the beam of the bridge is placed on the upper end surface of the upper seat plate, and the seismic isolation bearing, the pier and the beam are fixed with bolts, so that the beam is supported by the seismic isolation bearing of the present invention.

[0065] Applying the technical solution of the present invention has the following effects:

[0066] The use of the seismic isolation bearing of the present invention will not cause the beam to rise significantly. The bearing can be reset after the earthquake through the spring to reduce the residual displacement. The change in the friction coefficient on the contact plane between the middle seat plate and the upper seat plate and the combination of the air damping tube make the seismic isolation effect of the seismic isolation bearing of the present invention relatively uniformly distributed in space, which can better play the seismic isolation role.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A seismic isolation bearing with an air damping tube, It is characterized in that It comprises a middle seat plate (5), an upper seat plate (9) and at least two air damping tubes (7), wherein the upper seat plate (9) is arranged on the middle seat plate (5) and the planes in contact between the two form a plane friction pair (10), a plurality of the air damping tubes (7) are evenly arranged between the upper seat plate (9) and the middle seat plate (5), one end of the air damping tube (7) is connected to the upper seat plate (9) and the other end is connected to the middle seat plate (5), and the friction coefficient of the plane in contact between the middle seat plate (5) and the upper seat plate (9) gradually increases from the center of the plane to the periphery of the plane; It also includes a lower seat plate (1), the middle seat plate (5) being arranged on the lower seat plate (1), the middle seat plate (5) being provided with a spherical outer convex surface at a contact position between the two, the lower seat plate (1) being provided with a spherical inner concave surface, the spherical outer convex surface being arranged to match the spherical inner concave surface and the two forming a spherical friction pair (4), thereby realizing relative rotation between the middle seat plate and the lower seat plate; It also includes an elastic member, wherein a through hole is vertically provided at the center of the plane of the middle seat plate (5), and the elastic member is vertically arranged in the through hole, and one end of the elastic member is connected to the surface center of the spherical inner concave surface of the lower seat plate (1), and the other end is connected to the center position of the plane on the upper seat plate (9) that contacts the middle seat plate (5).

2. The seismic isolation support with air damping tube according to claim 1, It is characterized in that A blind hole is provided at the center of the contact plane between the upper seat plate (9) and the middle seat plate (5), and both ends of the elastic member are respectively connected to the inner wall of the blind hole and the center of the surface of the spherical inner concave surface through a first fixer (3).

3. The seismic isolation support with air damping tube according to claim 2, It is characterized in that The elastic member is a spring (2).

4. The seismic isolation support with air damping tube according to claim 2, It is characterized in that It also includes a limiting ring (11) and at least three pins (12), wherein the limiting ring (11) is arranged on the middle seat plate (5), and the center of the limiting ring (11) and the center of the contact plane between the middle seat plate (5) and the upper seat plate (9) are located on the same axis, and a plurality of the pins (12) are arranged on the middle seat plate (5) along the outer diameter of the limiting ring (11) to limit the limiting ring (11); The upper seat plate (9) is a cylinder, the lower end of the upper seat plate (9) is arranged in a limiting ring (11), and the inner diameter of the limiting ring (11) is greater than or equal to the outer diameter of the upper seat plate (9).

5. The seismic isolation support with air damping tube according to claim 4, It is characterized in that The pin (12) is vertically arranged on the middle seat plate (5), and a shearing ring (12.1) is also provided on the pin (12), and the pin (12) is sheared by the shearing ring (12.1) when impacted.

6. The seismic isolation support with air damping tube according to claim 5, It is characterized in that A cylindrical cavity is provided on the middle seat plate (5), the upper seat plate (9) is arranged in the cavity, a middle seat plate buffer pad (6) is provided on the inner side wall of the cavity, and an upper seat plate buffer pad (8) is also provided on the outer side wall of the upper seat plate (9).

7. The seismic isolation support with air damping tube according to claim 6, It is characterized in that An annular mounting groove (13) is provided in the middle of the upper seat plate (9); one end of the air damping tube (7) is connected to the inner wall of the cavity through a second fixer (7.1), and the other end is connected to the inner wall of the mounting groove (13) through a third fixer (7.2).

8. The seismic isolation support with air damping tube according to claim 7, It is characterized in that The second fixer (7.1) is a semicircular hook, which is arranged on the inner wall of the cavity. The third fixer (7.2) comprises two connecting blocks and a connecting rod. The two connecting blocks are arranged in the installation groove (13). The two connecting blocks are respectively arranged at both ends of the connecting rod to form an I-shaped structure. One end of the air damping tube (7) is connected to the connecting rod.

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