A plane sliding reliable locking type anti-lift beam seismic isolation bearing

Abstract

The present invention provides a plane sliding reliable locking type anti-lift beam seismic isolation bearing, comprising a top plate, a lower seat plate, a middle seat plate, a base plate and a limit plate, and also comprising a pressure device. Permanent blocks are arranged around the bottom surface of the top plate, and key pins are installed on the outer sides of the blocks in the transverse direction of the bridge on both sides. The key pins move synchronously with the top plate. A first groove is arranged on the upper surface of the lower seat plate. One end of the pressure device overlaps the lower seat plate, and the other end of the pressure device overlaps the key pin, pressing the key pin on one side into the first groove. During normal operation, the normal sliding of the bearing will not cause the beam body to lift, meeting the normal driving stability requirements of the bridge; when an earthquake occurs, the plane friction pair of the bearing is locked due to the key pin, and does not participate in the seismic isolation sliding. The bearing always slides in a double spherical surface, rather than interactive sliding of the double spherical surface and the plane, thereby improving the seismic isolation effect of the bearing in the longitudinal direction of the bridge; after the earthquake, the component force of the deadweight of the upper structure of the bearing along the curved surface direction serves as a restoring force, so that the bearing resumes its normal function.

Description

Technical Field

[0001] The present invention relates to the field of bridge structure or building technology, in particular to a plane sliding reliable locking type anti-lift beam seismic isolation bearing. Background Art

[0002] The hyperbolic spherical seismic isolation bearings currently widely used in railway bridges in earthquake zones usually include a plane friction pair and two spherical friction pairs. The characteristic of this structure is that under normal temperature rise, the bearing can achieve plane sliding in the longitudinal direction of the bridge, which will not cause the beam to rise, ensuring the smoothness requirements of the bridge track and having the function of preventing the beam from lifting. Under earthquake, the bearing limit device is released, and the longitudinal direction of the bridge is always alternately realized by plane sliding and hyperbolic sliding. The hyperbolic sliding process of the bearing is the seismic isolation process of the bearing. When the temperature rise displacement of the bearing, that is, the longitudinal normal sliding displacement, is large, the proportion of the bearing plane sliding in the total sliding distance under earthquake is high, and the plane sliding displacement may even exceed the hyperbolic sliding displacement, resulting in the appearance of a flat line in the bearing constitutive hysteresis curve, which to a certain extent reduces the seismic isolation effect of the bearing in the longitudinal direction of the bridge.

[0003] Velocity-locked isolation bearings effectively address these issues. When an earthquake occurs, velocity rapidly increases, causing the velocity locker to lock the planar friction pair and transmit horizontal force to shear the bearing limiter. The bearing then undergoes only hyperbolic sliding, effectively isolating the bearing. However, this type of bearing, based on the hyperbolic spherical isolation bearing, adds a velocity locker, resulting in larger bearing dimensions and higher costs.

[0004] Patent ZL201510488281.4 describes a seismic isolation bearing with a displacement locking mechanism. This mechanism uses a locking pop-up mechanism to lock at the extreme displacement of planar sliding, allowing the bearing to slide only on a hyperbolic surface during earthquakes. However, because the pop-up mechanism is in a compressed state for a long time, the elastic element is at risk of failure, resulting in the inability to eject the stopper during earthquakes. This reduces reliability, and under conditions of high-speed planar sliding, the pop-up mechanism may not activate in time before the locking position is missed. Summary of the Invention

[0005] In view of this, the present invention aims to propose a plane sliding reliable locking type anti-lift beam seismic isolation bearing to solve the above-mentioned problems existing in the prior art.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A plane sliding reliable locking type anti-lifting beam seismic isolation bearing includes a top plate, a lower seat plate, a middle seat plate, a base plate and a limit plate, and also includes a pressure device. Permanent blocks are arranged around the bottom surface of the top plate, and key pins are installed on the outer sides of the blocks in the transverse direction of the bridge on both sides. The key pins move synchronously with the top plate, and a first groove is provided on the upper surface of the lower seat plate. One end of the pressure device overlaps with the lower seat plate, and the other end of the pressure device overlaps with the key pin. The key pin on one side is pressed into the first groove to achieve locking of the plane displacement of one side of the top plate.

[0008] Furthermore, waist strips are installed on the outer sides of the stoppers in the transverse direction of the bridge on both sides, and key pins are placed between the waist strips and the top plate, and the key pins are constrained by the waist strips.

[0009] Furthermore, the pressure-applying device includes a clamping rod, a rotating shaft and a fixed seat. The fixed seat of the pressure-applying device is installed on the end faces of the transverse bridge blocks on both sides of the top plate. The pressure rod is connected to the fixed seat through the rotating shaft. With the rotating shaft as the boundary, the long end of the pressure rod overlaps with the lower seat plate, and the short end of the pressure rod overlaps with the key pin. The lifting force of the long end is converted into a clamping force on the key pin through the rotating shaft, pressing the key pin on one side into the first groove.

[0010] Furthermore, a connecting rod is provided on the lower seat plate, the long end of the pressing rod is overlapped on the connecting rod of the lower seat plate, and the cross section of one end of the long end away from the connecting rod is set as an inclined surface of unequal width.

[0011] Furthermore, a protrusion is provided on the key pin, and the short end of the clamping rod overlaps the protrusion, generating a torque around the rotating shaft to convert the lifting force of the long end into a clamping force on the protrusion and the key pin through the rotating shaft.

[0012] Furthermore, the lower edge of the key pin is configured as a rounded corner, and the upper edge of the first groove is processed as a rounded corner, which is opposite to the rounded corner of the key pin.

[0013] Furthermore, the upper surface of the lower seat plate is arranged in a stepped shape, and a first-step boss, a second-step boss and a third-step boss are arranged in sequence from the position close to the center to the outside. The first-step boss is opposite to the stop block of the top plate, and two through-length first grooves are arranged on both sides of the second-step boss. The third-step boss is a key pin movable surface.

[0014] Furthermore, a gap is left between the first-step boss and the stop block.

[0015] Furthermore, the key pin width is smaller than the first groove width.

[0016] Furthermore, the upper surface of the lower seat plate is inlaid with a flat non-metallic slide, and the bottom surface of the top plate is covered with a flat stainless steel slide. The flat non-metallic slide and the flat stainless steel slide constitute a flat friction pair. The convex spherical slide between the lower seat plate and the middle seat plate constitutes an upper spherical friction pair, and the concave spherical slide between the middle seat plate and the base plate constitutes a lower spherical friction pair.

[0017] Compared with the existing technology, the plane sliding reliable locking type anti-lifting beam seismic isolation bearing described in the present invention can achieve locking and post-seismic unlocking of the bearing plane friction pair by arranging key pins, waist strips, and pressure devices on the outer side of the top plate, and arranging bosses and slots on both sides of the lower seat plate.

[0018] (1) During normal operation, the curved friction pair of the bearing is constrained by the limiting plates on all sides, and only the flat friction pair between the top plate and the lower plate can slide horizontally. The normal sliding of the bearing will not cause the beam to lift, thus meeting the normal driving stability requirements of the bridge;

[0019] (2) When an earthquake occurs, the plane friction pair of the support slides first. When the top plate drives the key pin to slide to the maximum displacement of normal temperature rise, the first-stage boss of the lower plate limits the movement of the top plate, locking the plane displacement on one side. The lower plate transmits the horizontal force to the limit plate on one side. The limit plate is damaged and the spherical surface begins to swing to one side. At the same time, the second-stage boss limits the movement of the key pin. The linear movement of the connecting rod on the lower plate lifts the clamping rod, generating a torque around the axis of rotation, so that the other end of the clamping rod exerts downward pressure on the key pin. The key pin is trapped in the slot of the lower plate due to the dual action of the pressure device and gravity. The key pin and the rounded corners of the slot come into contact, making it easier to slide into the key slot, locking the plane displacement on the other side of the top plate. The horizontal force is transmitted to the limit plate on the other side through the lower plate. The limit plate is damaged and the spherical surface begins to swing in the opposite direction. After the limit plates on both sides are destroyed, the horizontal sliding constraints of the two spherical friction pairs are released. The bearing achieves horizontal reciprocating sliding through the combined action of the two spherical surfaces of the lower and middle seat plates, and the middle and bottom plates. During this reciprocating sliding process, the friction resistance of the sliding surfaces dissipates seismic energy and prolongs the natural vibration period of the structure, achieving a seismic isolation effect. During this process, the bearing's plane friction pair does not participate in the seismic isolation sliding due to the locked key pin. The bearing always slides on the two spherical surfaces, rather than the interaction between the two spherical surfaces and the plane, which improves the seismic isolation effect of the bearing in the longitudinal direction of the bridge.

[0020] (3) After the earthquake, the component of the deadweight of the upper structure of the support along the curved surface acts as a restoring force to reset the spherical surface of the support. At the same time, after the earthquake, the bolts on both sides of the waist bar are loosened, and the key pin is manually removed from the slot to unlock the plane friction pair. Finally, the plane friction pair of the support is pushed back to the center position by the jack, and the key pin and waist bar are reinstalled on both sides of the top plate to restore the normal function of the support.

[0021] (4) The key pin is located on the outside of the top plate, which is convenient for processing, manufacturing and installation, and also for replacement after an earthquake; arc settings are added to the bottom surface of the key pin and the edge of the key slot, making it easier for the key pin to fall into the key slot; the addition of a pressure mechanism further ensures reliable locking and avoids the risk of the key pin sliding through the key slot before it has time to fall into the key slot at high speed, resulting in locking failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a half-section structure in the transverse direction of the bridge in an embodiment of the present invention;

[0023] Figure 2 It is a BB cross-sectional view of the structure of an embodiment of the present invention;

[0024] Figure 3 2. It is a bottom view of the top plate in an embodiment of the present invention;

[0025] Figure 4 This is an enlarged view of the displacement locking mechanism in an embodiment of the present invention;

[0026] Figure 5 This is a schematic structural diagram of the "locked" state of the left side of the plane friction pair in an embodiment of the present invention;

[0027] Figure 6 2. This is a structural schematic diagram of the right side sliding process of the plane friction pair in an embodiment of the present invention;

[0028] Figure 7 This is a state diagram of the pressurizing device during the sliding process of the right side of the plane friction pair in an embodiment of the present invention;

[0029] Figure 8 This is a schematic structural diagram of the "locked" state of the right side of the plane friction pair in an embodiment of the present invention;

[0030] Figure 9 2. It is a schematic diagram of the key pin structure in an embodiment of the present invention;

[0031] Figure 10 2 is a schematic structural diagram of a pressurizing device according to an embodiment of the present invention;

[0032] Figure 11 2 is a schematic diagram of the waist strip structure in an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1-top plate, 101-stopper, 2-flat friction pair, 3-lower seat plate, 31-first groove, 301-first step boss, 302-second step boss, 303-third step boss, 32-connecting rod, 4-upper spherical friction pair, 5-middle seat plate, 6-lower spherical friction pair, 7-base plate, 8-limiting plate, 8-1-left limit plate, 8-2-right limit plate, 9-key pin, 9a-bump, 9-1-left key pin, 9-2-right key pin, 10-waist bar, 10-1-left waist bar, 10-2-right waist bar, 11-pressing device, 12-pressing rod, 121-long end, 122-short end, 13-rotating shaft, 14-fixed seat DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0036] like Figures 1 to 11 As shown, a plane sliding reliable locking type anti-lift beam seismic isolation bearing includes a top plate 1, a plane friction pair 2, a lower seat plate 3, an upper spherical friction pair 4, a middle seat plate 5, a lower spherical friction pair 6, a base plate 7, a limit plate 8, a key pin 9, a waist bar 10, a pressure device 11 and other components, wherein the pressure device 11 includes a clamping rod 12, a rotating shaft 13 and a fixed seat 14. The key pin 9 is installed on the outside of the block 101 on both sides of the transverse bridge direction. The key pin 9 moves synchronously with the top plate 1. A first groove 31 is provided on the upper surface of the lower seat plate 3. One end of the pressure device 11 overlaps the lower seat plate 3, and the other end of the pressure device 11 overlaps the key pin 9. The key pin 9 on one side is pressed into the first groove 31 to achieve locking of the plane displacement on one side of the top plate 1.

[0037] Specifically, permanent blocks 101 are provided around the bottom surface of the top plate 1. Waist strips 10 are screwed onto the outer sides of the blocks 101 on both sides in the transverse direction. A key pin 9 is placed between the waist strip 10 and the top plate 1. Under normal circumstances, the key pin 9 is constrained by the waist strip 10 and moves synchronously with the top plate 1. A first groove 31 is provided on the upper surface of the lower seat plate 3. The fixed seat 14 of the pressure device 11 is installed on the end faces of the blocks 101 on both sides in the transverse direction of the top plate 1. The pressing rod 12 of the pressure device 11 is connected to the fixed seat 14 through the rotating shaft 13. With the rotating shaft 13 as the boundary, the long end 121 of the pressing rod 12 overlaps the lower seat plate 3, and the short end 122 of the pressing rod 12 overlaps the key pin 9. The lifting force of the long end 121 is converted into a pressing force on the key pin 9 through the rotating shaft 13, pressing the key pin 9 on one side into the first groove 31, thereby locking the plane displacement of one side of the top plate.

[0038] Furthermore, a connecting rod 32 is provided on the lower seat plate 3. The long end 121 of the pressing rod 12 is overlapped on the connecting rod 32 of the lower seat plate 3. The connecting rod supports the long end of the pressing rod 12. The cross-section of the end of the long end away from the connecting rod 32 is configured as an inclined surface of unequal width, which facilitates the linear movement of the connecting rod 32 to lift the pressing rod 12, thereby generating a torque about the rotating shaft 13. A protrusion 9a is provided on the key pin 9. The short end 122 of the pressing rod 12 is overlapped on the protrusion 9a, generating a torque about the rotating shaft 13, which converts the lifting force of the long end into a pressing force on the protrusion 9a and the key pin 9 through the rotating shaft 13, thereby achieving a pressing effect on the key pin 9 and facilitating the key pin 9 to be pressed into the interior of the first groove 31.

[0039] Furthermore, the lower edge of the key pin 9 is configured as a rounded corner to facilitate the key pin 9 to slide into the first groove 31 .

[0040] The upper surface of the lower seat plate 3 is arranged in a stepped shape, with a first-step boss 301, a second-step boss 302, and a third-step boss 303 arranged in sequence from the center outward. The first-step boss 301 is opposite to the stopper 101 of the top plate, and there is a gap between the first-step boss 301 and the stopper 101. The distance of the gap is the maximum displacement of the support under normal temperature rise. Two full-length first grooves 31 are arranged on both sides of the second-step boss 302. The third-step boss 303 is the movable surface of the key pin 9. The width of the key pin 9 is slightly smaller than the first groove 31. Under normal circumstances, the key pin 9 falls on the third-step boss 303 of the lower seat plate 3. As the top plate 1 moves on the upper surface, the center distance between the key pin 9 and the first groove 31 is the maximum displacement of the support under normal temperature rise. The bottom surface of the key pin 9 is arranged in a circular arc, and the radius of the bottom arc of the key pin 9 is R.

[0041] Furthermore, the upper edge of the first groove 31 is processed into a transition arc with a radius of r. The transition arc cooperates with the bottom arc of the key pin 9, making it easier for the key pin 9 to slide into the first groove 31.

[0042] The height of the first-step boss 301 is higher than that of the third-step boss 303 , and the height difference between the two is D. The setting of the height difference D has a limiting effect to prevent the key pin from not falling into the key slot in time when moving at high speed.

[0043] Limiting plates 8 are provided around the upper limiting direction of the base plate 7 , and the limiting plates 8 have the function of restricting the horizontal sliding of the upper spherical friction pair 4 and the lower spherical friction pair 6 under normal circumstances.

[0044] Furthermore, the upper surface of the lower seat plate 3 is inlaid with a flat non-metallic slide, while the bottom surface of the top plate 1 is covered with a flat stainless steel slide. These two slides form the flat friction pair 2. The convex spherical slide between the lower seat plate 3 and the middle seat plate 5 forms the upper spherical friction pair 4, while the concave spherical slide between the middle seat plate 5 and the base plate 7 forms the lower spherical friction pair 6. Both the upper spherical friction pair 4 and the lower spherical friction pair 6 are sliding and rotating friction pairs. One of the concave and convex spherical slides is made of stainless steel, while the other is non-metallic. The stops 101 around the bottom of the top seat plate 1 are permanent stops. Guide slides are provided around the outer periphery of the lower portion of the lower seat plate 3 and on the inside of the corresponding limit plate 8.

[0045] The plane friction pair 2, the upper spherical friction pair 4, and the lower spherical friction pair 6 together form the vertical pressure-bearing friction pair of the support, providing vertical load-bearing, longitudinal bridge sliding, and vertical rotation. The limit plate 8 constrains the upper and lower spherical friction pairs 4 and 6 from horizontal sliding under normal circumstances. The permanent stops on both sides of the bottom cross-bridge of the top plate 1 constrain the plane friction pair 2 to a lateral position.

[0046] During normal operation, the curved friction pair of the support is constrained by the limiting plates 8 on all sides, and only the flat friction pair 2 between the top plate 1 and the lower seat plate 3 can slide horizontally. The normal sliding of the support will not cause the beam to rise, thus meeting the normal driving stability requirements of the bridge.

[0047] When an earthquake occurs, the plane friction pair 2 of the support slides first. When the top plate 1 drives the right key pin 9-2 to slide to the maximum displacement of normal temperature rise, the first-step boss 301 of the lower seat plate 3 limits the movement of the top plate 1, locking the plane displacement on one side. The lower seat plate 3 transmits the horizontal force to the left limit plate 8-1, the left limit plate 8-1 is destroyed, and the spherical surface begins to swing to one side; at the same time, the second-step boss 302 limits the movement of the right key pin 9-2, and the connecting rod 32 on the lower seat plate 3 moves linearly to lift the clamping rod 12, generating a torque around the rotating shaft 13, so that the other end of the clamping rod 12 has downward pressure on the right key pin 9-2. The right key pin 9-2 is sunk into the first groove 31 of the lower seat plate due to the dual effects of the pressure device 11 and gravity. The right key pin 9-2 contacts the rounded corner of the first groove 31, making it easier to slide into the first groove 31, locking the plane displacement of the other side of the top plate 1, and transmitting the horizontal force to the right limit plate 8-2 through the lower seat plate 3. The right limit plate 8-2 is destroyed, and the spherical surface begins to swing in the opposite direction. After the limit plates on both sides are destroyed, the horizontal sliding constraints of the two spherical friction pairs are released. The support realizes horizontal reciprocating sliding through the double spherical surface synthesis action of the lower seat plate 3 and the middle seat plate 5, and the middle seat plate 5 and the bottom plate 7. During the reciprocating sliding process, the seismic energy is dissipated through the friction resistance of the sliding surface, and the natural vibration period of the structure is extended to achieve the effect of seismic isolation. In this process, the plane friction pair 2 of the support does not participate in the seismic isolation sliding because the left key pin 9-1 is locked. The support always slides with double spherical surfaces, not interactive sliding of double spherical surfaces and planes, which improves the seismic isolation effect of the support in the longitudinal direction of the bridge.

[0048] After the earthquake, the component of the bearing's upper structure's deadweight along the curved surface acts as a restoring force, restoring the bearing's spherical surface. Simultaneously, after the earthquake, the bolts on both sides of the right waist bar 10-2 are loosened, and the right key pin 9-2 is manually removed from its slot to unlock the flat friction pair. Finally, the flat friction pair is pushed back to its center position using a jack. The right key pin 9-2 and right waist bar 10-2 are then reinstalled on both outer sides of the top plate 1, restoring the bearing to normal function.

[0049] The present embodiment is a plane sliding reliable locking type anti-lift beam seismic isolation support. Normal temperature rise displacement will not activate the plane sliding locking mechanism. Under earthquake, the top plate 1 plane slides to the maximum displacement of normal temperature rise. One side of the displacement direction contacts the first step boss preset in the lower seat plate 3, locking the plane displacement on one side. The lower seat plate 3 transmits the horizontal force to the left limit plate 8-1. The left limit plate 8-1 is broken and the spherical surface begins to swing to one side. At the same time, the right key pin 9-2 on the outside of the top plate 1 can quickly sink into the key groove of the lower seat plate due to the dual effects of the right pressure device 11 and gravity, reliably locking the plane displacement on the other side of the top plate. The horizontal force is transmitted to the right limit plate 8-2 through the lower seat plate 3. The right limit plate 8-2 is broken and the spherical surface begins to swing in the opposite direction. Finally, the support always performs the seismic isolation function in the form of pure hyperbolic sliding, improving the seismic isolation effect of the support in the longitudinal bridge direction. After the earthquake, the right key pin 9-2 can be quickly unlocked to restore the normal function of the support.

[0050] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A plane sliding reliable locking type anti-lift beam seismic isolation support, comprising a top plate (1), a lower seat plate (3), a middle seat plate (5), a base plate (7) and a limit plate (8), characterized in that: The present invention also includes a pressurizing device (11), permanent blocks (101) are arranged around the bottom surface of the top plate (1), key pins (9) are installed on the outside of the blocks (101) in the transverse direction on both sides, and the key pins (9) move synchronously with the top plate (1). A first groove (31) is provided on the upper surface of the lower seat plate (3), and the pressurizing device (11) includes a pressing rod (12), a rotating shaft (13) and a fixed seat (14). The fixed seat (14) of the pressurizing device (11) is installed on the end surface of the blocks (101) in the transverse direction on both sides of the top plate (1), and the pressurizing rod (12) is connected to the rotating shaft (13) by the fixing seat (14). ) is connected to the fixed seat (14), with the rotating shaft (13) as the boundary, the long end (121) of the clamping rod (12) overlaps the lower seat plate (3), and the short end (122) of the clamping rod (12) overlaps the key pin (9), and the lifting force of the long end (121) is converted into a clamping force on the key pin (9) through the rotating shaft (13), pressing the key pin (9) on one side into the first groove (31), thereby realizing the locking of the plane displacement of one side of the top plate (1), and the cross section of one end of the long end (121) close to the rotating shaft (13) is set as an inclined surface of unequal width.

2. The plane sliding reliable locking type anti-lift beam seismic isolation bearing according to claim 1 is characterized in that: Waist strips (10) are installed on the outside of the stoppers (101) on both sides in the transverse direction of the bridge, and a key pin (9) is placed between the waist strip (10) and the top plate (1), and the key pin (9) is constrained by the waist strip (10).

3. The plane sliding reliable locking anti-lift beam seismic isolation bearing according to claim 1 is characterized in that: A connecting rod (32) is provided on the lower seat plate (3), and the long end (121) of the pressing rod (12) is overlapped on the connecting rod (32) of the lower seat plate (3).

4. The plane sliding reliable locking type anti-lift beam seismic isolation bearing according to claim 1 is characterized in that: A protrusion (9a) is provided on the key pin (9), and the short end (122) of the pressing rod (12) overlaps the protrusion (9a), generating a torque around the rotating shaft (13) to convert the lifting force of the long end (121) into a pressing force on the protrusion (9a) and the key pin (9) through the rotating shaft (13).

5. The plane sliding reliable locking type anti-lift beam seismic isolation bearing according to claim 1 is characterized in that: The lower edge of the key pin (9) is configured as a rounded corner, and the upper edge of the first groove (31) is processed as a rounded corner, which is opposite to the rounded corner of the key pin (9).

6. The plane sliding reliable locking type anti-lift beam seismic isolation bearing according to claim 1 is characterized in that: The upper surface of the lower seat plate (3) is arranged in a stepped shape, and a first-step boss (301), a second-step boss (302) and a third-step boss (303) are arranged in sequence from the center outward, the first-step boss (301) is opposite to the stopper (101) of the top plate, and each side of the second-step boss (302) is provided with a first through-length groove (31), and the third-step boss (303) is a movable surface of the key pin (9).

7. The plane sliding reliable locking type anti-lift beam seismic isolation bearing according to claim 6 is characterized in that: A gap is left between the first-step boss (301) and the stopper (101).

8. The plane sliding reliable locking anti-lift beam seismic isolation bearing according to claim 6 is characterized in that: The width of the key pin (9) is smaller than the width of the first groove (31).

9. The plane sliding reliable locking anti-lift beam seismic isolation bearing according to claim 1 is characterized in that: The upper surface of the lower seat plate (3) is inlaid with a flat non-metallic slide plate, the bottom surface of the top plate (1) is covered with a flat stainless steel slide plate, the flat non-metallic slide plate and the flat stainless steel slide plate constitute a flat friction pair (2), the convex spherical slide plate between the lower seat plate (3) and the middle seat plate (5) constitutes an upper spherical friction pair (4), and the concave spherical slide plate between the middle seat plate (5) and the base plate (7) constitutes a lower spherical friction pair (6).

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