CN116044035A - A lift-off rubber bearing with an air spring - Google Patents

Abstract

The invention discloses a liftable rubber support with an air spring, and belongs to the technical field of bridge shock absorption. The device comprises an upper buttress and a lower buttress which are oppositely arranged, wherein the upper buttress is connected with the lower buttress through a supporting column, the supporting column comprises a connecting cylinder, a rubber bonding block and a plurality of air elastic columns, the connecting cylinder is penetrated and provided with a plurality of uniformly distributed air elastic columns along the circumferential direction of the connecting cylinder, the air elastic columns can extend or shorten along the axial direction of the supporting column, and the rubber bonding block is filled in the connecting cylinder; through set up a plurality of flexible air spring posts of support column axis direction that can follow at the support column circumferencial direction, utilize the elasticity characteristic of air spring post, along with the increase of rubber support vibration load capacity, the bearing capacity of rubber support increases, and air spring post can restrain vibration amplitude, avoids resonance, and when impact load increased, rigidity also became big, guarantees good vibration isolation effect.

Description

A lift-off rubber bearing with an air spring

technical field

The invention relates to the technical field of bridge damping, in particular to a liftable rubber bearing with an air spring.

Background technique

Earthquake is one of the important natural disasters that seriously endanger human existence, and it is unpredictable and sudden. Base isolation is to set a seismic isolation layer between the building foundation and the upper structure, so that the deformation is mainly concentrated in the isolation layer, prolonging the basic period of the structure, reducing the transmission of seismic energy to the upper structure, so that the upper structural components The vibration response under the earthquake is greatly reduced, improving the safety performance of the building.

Ordinary plate-type rubber bearings have gained more and more attention because of their simple structure, low cost, and convenient installation. Among them, lead-core rubber bearings are based on ordinary rubber bearings, and lead cores are added inside. After the lead is subjected to shear yield, it produces plastic deformation to dissipate energy and improve the damping performance of the rubber bearing. The support has good mechanical properties, which can not only utilize the plastic deformation of lead to dissipate energy, but also prolong the structural period, and have better shock absorption and isolation effects. However, lead is a toxic heavy metal, which is harmful to the human body during the production process, pollutes the environment during the use process, and is difficult to deal with later. The high-damping rubber bearing achieves the purpose of energy dissipation during vibration by weakening the elasticity of the rubber and increasing the viscosity of the rubber, but this will cause the rubber bearing to creep and lose its bearing capacity during long-term use.

The laminated rubber isolation bearing is a device with high vertical bearing capacity, small horizontal stiffness, and large horizontal lateral displacement allowable value. It can not only reduce the horizontal earthquake action, but also bear the vertical earthquake action. The most widely used seismic isolation device in China, laminated rubber seismic isolation bearings are manufactured according to different laminated structures and processes, in which the upper connection cover is connected with the upper structure of the building, and the lower connection cover is connected with the building foundation to transmit the horizontal shear force. The laminated rubber isolation bearing adopts a layer of thin rubber and a layer of thin steel plate alternately stacked. Due to the difference in the ability to restrain lateral deformation, the tensile capacity of the rubber bearing is much smaller than the compressive capacity. The tensile stiffness of the laminated rubber isolation bearing is relatively small relative to the compression stiffness, and the tensile capacity of the bearing is relatively poor. When the tensile stress reaches 1-2 MPa, it will yield. The vertical stiffness of the rubber bearing is relatively large compared to the horizontal stiffness. There is a possibility of amplifying the earthquake action, which makes the support easy to generate tensile stress. When the internal tensile stress of the seismic isolation bearing exceeds the limit during the earthquake, the building may overturn as a whole, and the laminated rubber isolation bearing will inevitably be under tension, resulting in damage to the isolation bearing. Therefore, the laminated rubber isolation bearing Insufficient tensile capacity of seismic bearings seriously restricts its application in buildings with large height-to-width ratios and high-rise buildings in high-intensity areas.

Contents of the invention

The object of the present invention is to provide a lift-off rubber bearing with an air spring, which is used to solve the problem that the tensile stiffness of the laminated rubber vibration-isolation bearing is relatively small relative to the compression stiffness, and the laminated rubber vibration-isolation The problem of poor tensile strength of the support.

The purpose of the present invention can be achieved through the following technical solutions:

A lift-off rubber bearing with an air spring, comprising an upper pier and a lower pier oppositely arranged, the upper pier and the lower pier are connected through a support column, and the support column includes a connecting cylinder , a rubber adhesive block and a number of air elastic columns, the connecting cylinder is provided with a number of evenly distributed air elastic columns along its circumferential direction, and the air elastic columns can be extended or shortened along the axial direction of the support column , the connecting cylinder is filled with the rubber adhesive block.

As a further solution of the present invention, the air elastic column includes a cylinder, an upper blocking cylinder and a lower blocking cylinder, and the upper blocking cylinder and the lower blocking cylinder, which are arranged oppositely, are slidably sleeved inside the cylinder along its axis direction. The closed space formed between the upper blocking cylinder and the lower blocking cylinder is filled with a sealed air column.

As a further solution of the present invention, the connecting cylinder is a cylindrical structure, one side of the connecting cylinder is connected with an upper connecting plate, the other side of the connecting cylinder is connected with a lower connecting plate, and several of the air elastic columns One end of the air elastic column passes through and protrudes from the upper connecting plate along the axial thickness direction of the upper connecting plate, and the other ends of several air elastic columns penetrate through and protrude from the lower connecting plate along the axial thickness direction of the lower connecting plate .

As a further solution of the present invention, the upper pier includes an upper pier body, a first embedded plate, a first embedded sleeve and a second embedded sleeve, and the bottom of the upper pier passes through the oppositely arranged second embedded sleeve. A pre-embedded sleeve and the second pre-embedded sleeve are connected with the first pre-embedded board.

As a further solution of the present invention, the lower pier includes a lower pier body, a second embedded plate, a third embedded sleeve and a fourth embedded sleeve, and the top of the lower pier passes through the oppositely arranged first embedded sleeve. The three embedded sleeves and the fourth embedded sleeve are connected with the second embedded plate.

As a further solution of the present invention, the bottom of the first embedded plate is connected with an upper lift-off support cover plate, and the upper lift-off support cover plate includes a first fastening ring plate, a first connecting ring plate and a first Connecting bolts, the inner wall of the first fastening ring plate is sleeved with the first connecting ring plate along its circumferential direction, and the top of the first fastening ring plate is provided with a number of evenly arranged first fastening ring plates along its circumferential direction. A connecting bolt, the first connecting bolt is embedded in the first embedded plate.

As a further solution of the present invention, the top of the second pre-embedded plate is connected with a lower lift-off support cover plate, and the lower lift-off support cover plate includes a second fastening ring plate, a second connecting ring plate and a second Connecting bolts, the inner wall of the second fastening ring plate is sleeved with the second connecting ring plate along its circumferential direction, and the bottom of the second fastening ring plate is provided with a number of evenly arranged first fastening ring plates along its circumferential direction. Two connecting bolts, the second connecting bolts are embedded in the second embedded plate.

As a further solution of the present invention, the upper connecting plate is connected to the upper abutment through first and second limiting pins arranged oppositely.

As a further solution of the present invention, the lower connecting plate is connected to the upper abutment through the third and fourth limiting pins arranged oppositely.

Beneficial effects of the present invention:

(1) A liftable rubber bearing with an air spring disclosed in the present invention is provided with a plurality of air elastic columns that can be stretched along the axial direction of the support column in the circumferential direction of the support column, and utilizes the elastic characteristics of the air elastic column. The increase in the vibration load of the rubber bearing reduces the height of the air elastic column, which increases the stiffness of the air elastic column and increases the bearing capacity of the rubber bearing. The air elastic column can suppress the vibration amplitude and avoid resonance. When the impact load increases , the stiffness also increases, while the natural frequency is basically unchanged in value, and it can guarantee a good vibration isolation effect whether it is heavy load or light load;

(2) A lift-off rubber bearing with an air spring disclosed in the present invention is connected by an upper blocking cylinder and a lower blocking cylinder made of two steel plates at both ends of the cylinder body, and the upper blocking cylinder and the lower blocking cylinder are connected. The airtight space formed between the lower blocking cylinders is filled with the sealing air column, and the air spring is formed by the elastic effect of the air. The sealing air column has a certain telescopic stroke. Different bearing capacities can be obtained by changing the internal pressure of the sealed air column inside the air elastic column due to the applied stress.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of the overall structure of a liftable rubber bearing with an air spring proposed by the present invention;

Fig. 2 is a schematic diagram of the internal structure of a support column with an air spring that can be lifted off the rubber bearing proposed by the present invention;

Fig. 3 is a front view of a support column with an air spring that can be lifted off the rubber bearing proposed by the present invention;

4 is a schematic diagram of the overall structure of a support column with an air spring that can be lifted off the rubber bearing proposed by the present invention;

Fig. 5 is a schematic diagram of the overall structure of an upper lift-off support cover plate with an air spring lift-off rubber support proposed by the present invention;

Fig. 6 is a schematic diagram of the overall structure of a lower lift-off support cover with an air spring lift-off rubber support proposed by the present invention.

In the figure: 1, the upper pier; 11, the upper pier; 101, the first embedded plate; 102, the first plug welding position; 103, the third plug welding position; 104, the first limit pin; 105, the first Two limit pins; 106, the first embedded sleeve; 107, the second embedded sleeve; 2, the lower pier; 21, the lower pier body; 201, the second embedded plate; 202, the welding position of the second plug ; 203, the fourth plug welding position; 204, the third limit pin; 205, the fourth limit pin; 206, the third embedded sleeve; 207, the 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 blocking cylinder; 36, lower blocking cylinder; 37, air elastic column; 38, cylinder body ;4, lift up the cover plate from the support; 41, the first fastening ring plate; 42, the first connecting ring plate; 43, the first connecting bolt; 5, lift the cover plate off the support; 51, the second clamp Fixed ring plate; 52, the second connecting ring plate; 53, the second connecting bolt.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience The present invention is described and the simplified description does not indicate or imply that the device or element referred to must have a specific orientation, as well as a specific orientation configuration and operation, and therefore, should not be construed as limiting the present invention. In addition, "first" and "second" are for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

As shown in Figure 1-6, a lift-off rubber bearing with an air spring includes an upper pier 1, and an upper lift-off support cover 4 is connected below the upper pier 1, and the upper lift-off support cover The support column 3 is connected to the bottom of the plate 4, the lower lift-off support cover plate 5 is connected to the lower support column 3, and the lower buttress 2 is connected to the lower lift-off support cover plate 5;

The support column 3 includes a connecting cylinder 30 filled with rubber adhesive blocks 33, the upper side of the connecting cylinder 30 is connected with an upper connecting plate 31, the lower side of the connecting cylinder 30 is connected with a lower connecting plate 32, and the connecting cylinder 30 is Cylindrical structure, the connecting cylinder 30 is provided with four evenly arranged air elastic columns 37 along its circumferential direction. The lower end protrudes from the lower surface of the lower connecting plate 32, and the two ends of the air elastic column 37 can be extended or shortened in the vertical direction;

By arranging a number of air elastic columns 37 that can be stretched along the axial direction of the support column 3 in the circumferential direction of the support column 3, utilizing the elastic properties of the air elastic column 37, the height of the air elastic column 37 decreases as the vibration load of the rubber bearing increases. The stiffness of the air elastic column 37 is increased, and the bearing capacity of the rubber bearing is increased. The air elastic column 37 can suppress the vibration amplitude and avoid resonance. When the impact load increases, the stiffness also increases, and the natural frequency is basically the same in value. Whether it is heavy load or light load, it can guarantee a good vibration isolation effect;

The air elastic column 37 includes a cylinder 38, and the upper and lower ends of the cylinder 38 in the vertical direction are provided with an upper blocking cylinder 35 and a lower blocking cylinder 36 which can slide along the inner wall of the cylinder 38, between the upper blocking cylinder 35 and the lower blocking cylinder 36 The closed space formed between them is filled with a sealed air column 34, and the inside of the cylinder body 38 is sealed to prevent air leakage;

The two ends of the cylinder body 38 are connected with the upper blocking cylinder 35 and the lower blocking cylinder 36 made of two steel plates, and the airtight space formed between the upper blocking cylinder 35 and the lower blocking cylinder 36 is filled with a sealed air column 34. The elastic action forms an air spring, and the sealed air column 34 has a certain telescopic stroke. When the sealed air column 34 stretches, it can offset the pulling force on the rubber support, reduce the stress on the rubber support, and change the sealed air column inside the air elastic column 37. 34 internal pressure, you can get different bearing capacity.

The upper lift-off support cover plate 4 includes a first fastening ring plate 41, the upper surface of the first fastening ring plate 41 is provided with a number of evenly arranged first connecting bolts 43 along the upper surface of the first fastening ring plate 41, and the first fastening ring plate The inner wall of 41 is provided with a first connecting ring plate 42, and the cover plate 4 is detachably bolted to the first pre-embedded plate 101 through the first connecting bolt 43;

The lower lift-off support cover plate 5 includes a second fastening ring plate 51, the lower surface of the second fastening ring plate 51 is provided with some evenly arranged second connecting bolts 53 along the lower surface of the second fastening ring plate 51, and the second fastening ring plate The inner wall of 51 is provided with a second connecting ring plate 52, and the lower lift-off support cover plate 5 is detachably bolted to the second embedded plate 201 through the second connecting bolt 53;

The upper lift-off support cover plate 4 can reliably transmit the load and deformation borne by the structure of the upper pier 1 to the lower support pier 2 through the lower lift-off support cover plate 5, and is convenient for disassembly and installation;

The upper pier 1 includes an upper pier body 11, a first embedded plate 101, a first plug welding position 102, a third plug welding position 103, a first limit pin 104, a second limit pin 105, a first embedded sleeve The cylinder 106, the second embedded sleeve 107, the bottom of the upper pier 1 is connected to the first embedded plate 101 through the first embedded sleeve 106 and the second embedded sleeve 107 arranged oppositely, and the first embedded sleeve 107 arranged oppositely The limit pin 104 and the second limit pin 105 connect the first embedded plate 101, the upper connecting plate 31 of the upper lift-off support cover plate 4 and the support column 3 from top to bottom in sequence, and the end of the first limit pin 104 The first plug welding position 102 is set on the bottom sleeve, and the third plug welding position 103 is set on the end of the second limit pin 105;

The lower pier 2 includes a lower pier body 21, a second embedded plate 201, a second plug welding position 202, a fourth plug welding position 203, a third limit pin 204, a fourth limit pin 205, a third embedded sleeve cylinder 206, the fourth embedded sleeve 207, the top of the lower pier 2 is connected with the second embedded plate 201 through the third embedded sleeve 206 and the fourth embedded sleeve 207 arranged oppositely, and the third embedded The limit pin 204 and the fourth limit pin 205 connect the second embedded plate 201, the lower connecting plate 32 of the support column 3 from the bottom to the top, and the third limit pin 204 ends The second plug welding position 202 is sleeved, and the fourth stopper pin 205 is sleeved with a fourth plug welding position 203;

The working principle of a lift-off rubber bearing with an air spring disclosed in the present invention is as follows: the two ends of the cylinder body 38 are connected with the upper blocking cylinder 35 and the lower blocking cylinder 36 made of two steel plates to form a The sealed air column 34 is filled with compressed air inside the retractable sealed cylinder 38 of the air elastic column 37, and the air spring is formed by the elastic action of the air. The sealed air column 34 has a certain telescopic stroke, and the sealed air column 34 can offset the To the tension of 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 becomes larger, while the natural frequency is basically unchanged in value , whether it is heavy load or light load can ensure a good vibration isolation effect, changing the internal pressure of the sealed air column 34 inside the air elastic column 37, can obtain different bearing capacity.

An embodiment of the present invention has been described in detail above, but the content described is only a preferred embodiment of the present invention, and cannot be considered as limiting the implementation scope of the present invention. All equivalent changes and improvements made according to the application scope of the present invention shall still belong to the scope covered by the patent of the present invention.

Claims (9)

1. A liftable rubber bearing with an air spring, comprising oppositely arranged upper buttresses (1) and lower buttresses (2), the upper buttresses (1) and the lower buttresses (2) ) are connected by a support column (3), characterized in that the support column (3) includes a connecting cylinder (30), a rubber adhesive block (33) and several air elastic columns (37), and the connecting cylinder (30 ) is provided with a number of evenly distributed air elastic columns (37) along its circumferential direction, the air elastic columns (37) can be extended or shortened along the axial direction of the support column (3), and the connecting cylinder (30) is filled with the rubber adhesive block (33). 2. A liftable rubber bearing with an air spring according to claim 1, characterized in that, the air elastic column (37) comprises a cylinder (38), an upper blocking cylinder (35) and a lower A plugging cylinder (36), the inside of the cylinder body (38) is slidingly sleeved with the upper blocking cylinder (35) and the lower blocking cylinder (36) arranged oppositely along the axial direction thereof, and the upper blocking cylinder (35) ) and the closed space formed between the lower blocking cylinder (36) is filled with a sealed air column (34). 3. A lift-off rubber bearing with an air spring according to claim 1, characterized in that, the connecting cylinder (30) is a cylindrical structure, and one side of the connecting cylinder (30) An upper connecting plate (31) is connected, the other side of the connecting cylinder (30) is connected with a lower connecting plate (32), and one end of several air elastic columns (37) is along the axis of the upper connecting plate (31). penetrating and protruding from the upper connecting plate (31) in the thickness direction, and the other ends of several air elastic columns (37) penetrate and protruding from the lower connecting plate (32) along the axial thickness direction of the lower connecting plate (32) (32). 4. A lift-off rubber bearing with an air spring according to claim 1, characterized in that the upper pier (1) comprises an upper pier body (11), a first embedded plate (101 ), the first embedded sleeve (106) and the second embedded sleeve (107), the bottom of the upper pier (11) passes through the first embedded sleeve (106) and the second Two embedded sleeves (107) are connected with the first embedded plate (101). 5. A lift-off rubber bearing with an air spring according to claim 1, characterized in that the lower pier (2) comprises a lower pier body (21), a second embedded plate (201 ), the third embedded sleeve (206) and the fourth embedded sleeve (207), the top of the lower pier (21) passes through the third embedded sleeve (206) and the second Four embedded sleeves (207) are connected with the second embedded plate (201). 6. A lift-off rubber bearing with an air spring according to claim 4, characterized in that, the bottom of the first embedded plate (101) is connected with an upper lift-off bearing cover plate (4) , the upper lift-off support cover plate (4) includes a first fastening ring plate (41), a first connecting ring plate (42) and a first connecting bolt (43), and the first fastening ring plate ( 41) The inner wall is sleeved with the first connecting ring plate (42) along its circumferential direction, and the top of the first fastening ring plate (41) is provided with a number of uniformly arranged first connecting bolts along its circumferential direction (43), the first connecting bolts (43) are embedded inside the first embedded plate (101). 7. A lift-off rubber bearing with an air spring according to claim 5, characterized in that, the top of the second embedded plate (201) is connected with a lower lift-off bearing cover plate (5) , the lower lift-off support cover plate (5) includes a second fastening ring plate (51), a second connecting ring plate (52) and a second connecting bolt (53), and the second fastening ring plate ( 51) The inner wall is sleeved with the second connecting ring plate (52) along its circumferential direction, and the bottom of the second fastening ring plate (51) is provided with a number of evenly arranged second connecting bolts along its circumferential direction (53), the second connecting bolts (53) are embedded inside the second embedded plate (201). 8. A lift-off rubber bearing with an air spring according to claim 3, characterized in that, the upper connecting plate (31) passes through the oppositely arranged first limit pin (104) and the second The limit pin (105) is connected with the upper pier (1). 9. A lift-off rubber bearing with an air spring according to claim 3, characterized in that, the lower connecting plate (32) passes through the third limiting pin (204) and the fourth The limit pin (205) is connected with the upper pier (1).

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