Liftable rubber bearing with air spring

Abstract

The present invention discloses a liftable rubber bearing with an air spring, belonging to the technical field of bridge shock absorption. It includes an upper pier and a lower pier arranged oppositely, and the upper pier and the lower pier are connected by support columns. The support columns include connecting cylinders, rubber bonding blocks and a number of air elastic columns. The connecting cylinder is provided with a number of uniformly distributed air elastic columns penetrating along its circumferential direction. The air elastic columns can extend or shorten along the axis direction of the support column, and the connecting cylinder is filled with the rubber bonding blocks. By arranging a number of air elastic columns that can expand and contract along the axis direction of the support column in the circumferential direction of the support column, using the elastic characteristics of the air elastic columns, as the vibration load of the rubber bearing increases, the bearing capacity of the rubber bearing increases, and the air elastic columns can suppress the vibration amplitude and avoid resonance. When the impact load increases, the stiffness also becomes larger, ensuring a good vibration isolation effect.

Description

Technical Field

[0001] This invention relates to the field of bridge vibration reduction technology, specifically to a liftable rubber bearing with an air spring. Background Technology

[0002] Earthquakes are one of the most serious natural disasters threatening human survival, characterized by their unpredictability and suddenness. Base isolation involves placing a seismic isolation layer between the building's foundation and the superstructure. This concentrates deformation primarily within the isolation layer, extending the structure's fundamental period and reducing the transmission of seismic energy to the upper structure. Consequently, the vibration response of the superstructure components under earthquakes is significantly reduced, improving the building's safety performance.

[0003] Ordinary plate rubber bearings have gained increasing attention due to their simple structure, low cost, and convenient installation. Lead-core rubber bearings, in particular, are based on ordinary rubber bearings with an internal lead core. They utilize the plastic deformation of lead under shear yielding to dissipate energy, thus improving the damping performance of the rubber bearing. This type of bearing possesses good mechanical properties, utilizing the plastic deformation of lead to dissipate energy while extending the structural period and providing good seismic isolation. However, lead is a toxic heavy metal, harmful to human health during production and polluting the environment during use, with difficult post-treatment processes. High-damping rubber bearings achieve energy dissipation during vibration by reducing the elasticity and increasing the viscosity of the rubber. However, this leads to increased creep and loss of load-bearing capacity over long-term use.

[0004] Laminated rubber seismic isolation bearings are devices with high vertical bearing capacity, low horizontal stiffness, and a large allowable horizontal lateral displacement. They can reduce both horizontal and vertical seismic forces, making them the most widely used seismic isolation devices in engineering. Laminated rubber seismic isolation bearings are manufactured using different laminated structures and processes. The upper connecting plate connects to the superstructure of the building, while the lower connecting plate connects to the foundation to transfer horizontal shear force. Laminated rubber seismic isolation bearings consist of alternating layers of thin rubber and thin steel plates. Due to the difference in their ability to restrain lateral deformation, the tensile strength of the rubber bearing is much lower than its compressive strength. The tensile stiffness of the laminated rubber seismic isolation bearing is relatively small compared to its compressive stiffness, resulting in poor tensile strength. It yields at a tensile stress of 1-2 MPa. The vertical stiffness of the rubber bearing is relatively large compared to its horizontal stiffness, which may amplify seismic forces, making the bearing prone to tensile stress. When the internal tensile stress of the seismic isolation bearing exceeds the limit during seismic motion, the building may overturn as a whole. The laminated rubber seismic isolation bearing will inevitably be subjected to tension, leading to its failure. Therefore, the insufficient tensile strength of the laminated rubber seismic isolation bearing seriously restricts its application in buildings with large height-to-width ratios and high-rise buildings in high-intensity seismic zones. Summary of the Invention

[0005] The purpose of this invention is to provide a liftable rubber bearing with an air spring, which solves the problem that the tensile stiffness of the existing laminated rubber seismic isolation bearing is relatively small compared with the compressive stiffness, and the tensile strength of the laminated rubber seismic isolation bearing is relatively poor.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A liftable rubber support with an air spring includes an upper support and a lower support arranged opposite to each other. The upper support and the lower support are connected by a support column. The support column includes a connecting cylinder, a rubber adhesive block, and a plurality of air elastic columns. The connecting cylinder is provided with a plurality of evenly distributed air elastic columns along its circumferential direction. The air elastic columns can extend or shorten along the axis of the support column. The connecting cylinder is filled with the rubber adhesive block.

[0008] As a further embodiment of the present invention, the air elastic column includes a cylinder, an upper plug cylinder and a lower plug cylinder. The upper plug cylinder and the lower plug cylinder are slidably sleeved inside the cylinder along its axial direction, and the closed space formed between the upper plug cylinder and the lower plug cylinder is filled with a sealing air column.

[0009] As a further embodiment of the present invention, the connecting cylinder is a cylindrical structure, with an upper connecting plate connected to one side of the connecting cylinder and a lower connecting plate connected to the other side of the connecting cylinder. One end of each of the plurality of air elastic columns penetrates through and protrudes from the upper connecting plate along the axial thickness direction, and the other end of each of the plurality of air elastic columns penetrates through and protrudes from the lower connecting plate along the axial thickness direction.

[0010] As a further embodiment of the present invention, the upper support includes an upper support body, a first embedded plate, a first embedded sleeve, and a second embedded sleeve. The bottom of the upper support body is connected to the first embedded plate through the first embedded sleeve and the second embedded sleeve, which are arranged opposite to each other.

[0011] As a further embodiment of the present invention, the lower support includes a lower support body, a second embedded plate, a third embedded sleeve, and a fourth embedded sleeve. The top of the lower support body is connected to the second embedded plate through the relatively disposed third embedded sleeve and the fourth embedded sleeve.

[0012] As a further embodiment of the present invention, the bottom of the first embedded plate is connected to an upper lifting support cover plate, the upper lifting support cover plate includes a first locking ring plate, a first connecting ring plate and a first connecting bolt, the first connecting ring plate is sleeved on the inner wall of the first locking ring plate along its circumferential direction, and a plurality of the first connecting bolts are evenly arranged on the top of the first locking ring plate along its circumferential direction, the first connecting bolts being embedded inside the first embedded plate.

[0013] As a further embodiment of the present invention, the top of the second embedded plate is connected to a lower lifting support cover plate, the lower lifting support cover plate includes a second locking ring plate, a second connecting ring plate and a second connecting bolt, the second connecting ring plate is sleeved on the inner wall of the second locking ring plate along its circumferential direction, and a plurality of evenly arranged second connecting bolts are provided at the bottom of the second locking ring plate along its circumferential direction, the second connecting bolts being embedded inside the second embedded plate.

[0014] As a further embodiment of the present invention, the upper connecting plate is connected to the upper support block by a first limiting pin and a second limiting pin that are disposed opposite to each other.

[0015] As a further embodiment of the present invention, the lower connecting plate is connected to the lower support block by a third limiting pin and a fourth limiting pin arranged opposite to each other.

[0016] The beneficial effects of this invention are:

[0017] (1) The liftable rubber support with air spring disclosed in this invention is provided with several telescopic air elastic columns in the circumferential direction of the support column. By utilizing the elastic characteristics of the air elastic columns, as the vibration load of the rubber support increases, the height of the air elastic columns decreases, thereby increasing the stiffness of the air elastic columns and increasing the load-bearing capacity of the rubber support. The air elastic columns can suppress the vibration amplitude and avoid resonance. When the impact load increases, the stiffness also increases, while the natural frequency remains basically unchanged in value. It can ensure a good vibration isolation effect whether under heavy or light load.

[0018] (2) The liftable rubber support with air spring disclosed in this invention is connected by an upper plug and a lower plug made of two steel plates at both ends of the cylinder. The sealed space formed between the upper plug and the lower plug is filled with a sealing air column. The air spring is formed by the elasticity of air. The sealing air column has a certain extension stroke. When the sealing air column extends and retracts, it can offset the tension on the rubber support and reduce the stress on the rubber support. By changing the internal pressure of the sealing air column inside the air elastic column, different load-bearing capacities can be obtained. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of a liftable rubber support with an air spring proposed in this invention.

[0021] Figure 2 This is a schematic diagram of the internal structure of a support column with an air spring and a liftable rubber support proposed in this invention.

[0022] Figure 3 This is a front view of a support column with an air spring and a liftable rubber support proposed in this invention.

[0023] Figure 4 This is a schematic diagram of the overall structure of a support column with an air spring and a liftable rubber support proposed in this invention.

[0024] Figure 5 This is a schematic diagram of the overall structure of the upper lift-off support cover plate of the liftable rubber support with air spring proposed in this invention.

[0025] Figure 6 This is a schematic diagram of the overall structure of the lower lift-off support cover plate of the liftable rubber support with air spring proposed in this invention.

[0026] In the diagram: 1. Upper support pier; 11. Upper pier body; 101. First embedded plate; 102. First plug weld position; 103. Third plug weld position; 104. First limiting pin; 105. Second limiting pin; 106. First embedded sleeve; 107. Second embedded sleeve; 2. Lower support pier; 21. Lower pier body; 201. Second embedded plate; 202. Second plug weld position; 203. Fourth plug weld position; 204. Third limiting pin; 205. Fourth limiting pin; 206. Third embedded sleeve; 207. Fourth embedded sleeve; 3. Support column; 30. Connecting cylinder; 31. Upper connecting plate; 32. Lower connecting plate; 33. Rubber adhesive block; 34. Sealing air column; 35. Upper plug cylinder; 36. Lower plug cylinder; 37. Air elastic column; 38. Cylinder body; 4. Upper lift-off support cover plate; 41. First locking ring plate; 42. First connecting ring plate; 43. First connecting bolt; 5. Lower lift-off support cover plate; 51. Second locking ring plate; 52. Second connecting ring plate; 53. Second connecting bolt. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] like Figure 1-6 As shown, a liftable rubber support with an air spring includes an upper support 1, an upper liftable support cover plate 4 connected below the upper support 1, a support column 3 connected below the upper liftable support cover plate 4, a lower liftable support cover plate 5 connected below the support column 3, and a lower support 2 connected below the lower liftable support cover plate 5.

[0031] The support column 3 includes a connecting cylinder 30, which is filled with a rubber adhesive block 33. An upper connecting plate 31 is connected to the upper side of the connecting cylinder 30, and a lower connecting plate 32 is connected to the lower side of the connecting cylinder 30. The connecting cylinder 30 has a cylindrical structure. Four evenly arranged air elastic columns 37 are arranged through the connecting cylinder 30 along its circumferential direction. The upper end of the air elastic column 37 protrudes from the upper surface of the upper connecting plate 31, and the lower end of the air elastic column 37 protrudes from the lower surface of the lower connecting plate 32. Both ends of the air elastic column 37 can be extended or shortened in the vertical direction.

[0032] By setting several telescopic air elastic columns 37 along the axis of the support column 3 in the circumferential direction, the height of the air elastic column 37 decreases as the vibration load of the rubber bearing increases, thereby increasing the stiffness of the air elastic column 37 and increasing the load-bearing capacity of the rubber bearing. The air elastic column 37 can suppress the vibration amplitude and avoid resonance. When the impact load increases, the stiffness also increases, while the natural frequency remains basically unchanged in value. It can ensure a good vibration isolation effect whether under heavy or light load.

[0033] The air elastic column 37 includes a cylinder 38. The upper and lower ends of the cylinder 38 in the vertical direction are fitted with an upper plug 35 and a lower plug 36 that can slide along the inner wall of the cylinder 38. The closed space formed between the upper plug 35 and the lower plug 36 is filled with a sealing air column 34. The inside of the cylinder 38 is sealed to prevent air leakage.

[0034] The two ends of the cylinder 38 are connected by an upper plug cylinder 35 and a lower plug cylinder 36 made of two steel plates. The sealed space formed between the upper plug cylinder 35 and the lower plug cylinder 36 is filled with a sealing air column 34. The air elasticity is used to form an air spring. The sealing air column 34 has a certain extension and contraction stroke. When the sealing air column 34 extends and contracts, it can offset the tension on the rubber support and reduce the stress on the rubber support. By changing the internal pressure of the sealing air column 34 inside the air elastic column 37, different load-bearing capacities can be obtained.

[0035] The lifting support cover plate 4 includes a first retaining ring plate 41. The upper surface of the first retaining ring plate 41 along its circumferential direction is provided with a number of evenly arranged first connecting bolts 43. The inner wall of the first retaining ring plate 41 is fitted with a first connecting ring plate 42. The lifting support cover plate 4 is detachably bolted to the first embedded plate 101 through the first connecting bolts 43.

[0036] The lower lifting support cover plate 5 includes a second locking ring plate 51. The lower surface of the second locking ring plate 51 along its circumferential direction is provided with a number of evenly arranged second connecting bolts 53. The inner wall of the second locking ring plate 51 is fitted with a second connecting ring plate 52. The lower lifting support cover plate 5 is detachably bolted to the second embedded plate 201 through the second connecting bolts 53.

[0037] The upper lift-off support cover plate 4 can reliably transfer the load and deformation borne by the upper support 1 structure to the lower support 2 through the lower lift-off support cover plate 5, and is easy to disassemble and install.

[0038] The upper support pier 1 includes an upper pier body 11, a first embedded plate 101, a first plug weld position 102, a third plug weld position 103, a first limiting pin 104, a second limiting pin 105, a first embedded sleeve 106, and a second embedded sleeve 107. The bottom of the upper support pier 1 is connected to the first embedded plate 101 through the first embedded sleeve 106 and the second embedded sleeve 107 arranged opposite to each other. The first limiting pin 104 and the second limiting pin 105 arranged opposite to each other connect the first embedded plate 101, the upper lifting support cover plate 4, and the upper connecting plate 31 of the support column 3 from top to bottom. The first limiting pin 104 is fitted with the first plug weld position 102, and the second limiting pin 105 is fitted with the third plug weld position 103.

[0039] The lower support pier 2 includes a lower pier body 21, a second embedded plate 201, a second plug weld position 202, a fourth plug weld position 203, a third limiting pin 204, a fourth limiting pin 205, a third embedded sleeve 206, and a fourth embedded sleeve 207. The top of the lower support pier 2 is connected to the second embedded plate 201 through the relatively arranged third embedded sleeve 206 and fourth embedded sleeve 207. The relatively arranged third limiting pin 204 and fourth limiting pin 205 connect the second embedded plate 201, the lower lifting support cover plate 5, and the lower connecting plate 32 of the support column 3 from bottom to top. The end of the third limiting pin 204 is fitted with the second plug weld position 202, and the end of the fourth limiting pin 205 is fitted with the fourth plug weld position 203.

[0040] The working principle of the liftable rubber bearing with air spring disclosed in this invention is as follows: The two ends of the cylinder 38 are connected by an upper plug cylinder 35 and a lower plug cylinder 36 made of two steel plates to form a sealed air column 34. Compressed air is filled inside the retractable sealed cylinder 38 of the air elastic column 37, forming an air spring by utilizing the elasticity of air. The sealed air column 34 has a certain extension and contraction stroke. When the sealed air column 34 extends and contracts, it can offset the tension on the rubber bearing and reduce the stress on the rubber bearing. The air elastic column 37 can suppress the vibration amplitude and avoid resonance. When the impact load increases, the stiffness also increases, while the natural frequency remains basically unchanged in value. It can ensure a good vibration isolation effect regardless of heavy or light load. Different load-bearing capacities can be obtained by changing the internal pressure of the sealed air column 34 inside the air elastic column 37.

[0041] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A liftable rubber support with an air spring, comprising an upper support (1) and a lower support (2) arranged opposite to each other, the upper support (1) and the lower support (2) being connected by a support column (3), characterized in that, The support column (3) includes a connecting cylinder (30), a rubber adhesive block (33), and a plurality of air elastic columns (37). The connecting cylinder (30) is provided with a plurality of evenly distributed air elastic columns (37) in its circumferential direction. The air elastic columns (37) can be extended or shortened along the axial direction of the support column (3). The connecting cylinder (30) is filled with the rubber adhesive block (33). The air elastic column (37) includes a cylinder (38), an upper plug (35) and a lower plug (36). The upper plug (35) and the lower plug (36) are slidably sleeved inside the cylinder (38) along its axial direction. The closed space formed between the upper plug (35) and the lower plug (36) is filled with a sealing air column (34). The connecting cylinder (30) is a cylindrical structure. One side of the connecting cylinder (30) is connected to an upper connecting plate (31), and the other side of the connecting cylinder (30) is connected to a lower connecting plate (32). One end of a plurality of air elastic columns (37) passes through and protrudes from the upper connecting plate (31) along the axial thickness direction, and the other end of the plurality of air elastic columns (37) passes through and protrudes from the lower connecting plate (32) along the axial thickness direction.

2. A liftable rubber support with an air spring according to claim 1, characterized in that, The upper support (1) includes an upper support body (11), a first embedded plate (101), a first embedded sleeve (106), and a second embedded sleeve (107). The bottom of the upper support body (11) is connected to the first embedded plate (101) through the first embedded sleeve (106) and the second embedded sleeve (107) which are arranged opposite to each other.

3. A liftable rubber support with an air spring according to claim 1, characterized in that, The lower support (2) includes a lower support body (21), a second embedded plate (201), a third embedded sleeve (206) and a fourth embedded sleeve (207). The top of the lower support body (21) is connected to the second embedded plate (201) through the third embedded sleeve (206) and the fourth embedded sleeve (207) which are arranged opposite to each other.

4. A liftable rubber support with an air spring according to claim 2, characterized in that, The bottom of the first embedded plate (101) is connected to an upper lifting support cover plate (4). The upper lifting support cover plate (4) includes a first locking ring plate (41), a first connecting ring plate (42) and a first connecting bolt (43). The first connecting ring plate (42) is sleeved on the inner wall of the first locking ring plate (41) along its circumferential direction. A number of the first connecting bolts (43) are evenly arranged on the top of the first locking ring plate (41) along its circumferential direction. The first connecting bolts (43) are embedded in the first embedded plate (101).

5. A liftable rubber support with an air spring according to claim 3, characterized in that, The top of the second embedded plate (201) is connected to a lower lifting support cover plate (5). The lower lifting support cover plate (5) includes a second locking ring plate (51), a second connecting ring plate (52), and a second connecting bolt (53). The second locking ring plate (51) is fitted with the second connecting ring plate (52) along its circumferential direction on its inner wall. The bottom of the second locking ring plate (51) is provided with a number of evenly arranged second connecting bolts (53) along its circumferential direction. The second connecting bolts (53) are embedded in the second embedded plate (201).

6. A liftable rubber support with an air spring according to claim 1, characterized in that, The upper connecting plate (31) is connected to the upper support (1) by a first limiting pin (104) and a second limiting pin (105) that are arranged opposite to each other.

7. A liftable rubber support with an air spring according to claim 1, characterized in that, The lower connecting plate (32) is connected to the lower support (2) by a third limiting pin (204) and a fourth limiting pin (205) that are arranged opposite to each other.

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