An adaptable internal liquid damping device for box girders and box girders

Abstract

The present invention provides a box girder internal liquid damping device with strong adaptability and a box girder, including a box body, a partition board, and damping liquid arranged inside the box body. A plurality of partition boards are arranged and connected to the inside of the box body, so that the plurality of partition boards divide the inside of the box body into a plurality of chambers. The damping liquid is distributed inside the plurality of chambers. A circulation hole is opened between the chambers, and a rotatable sealing plate is arranged on the circulation hole; a buffer spring is arranged on the rotating shaft of the sealing plate. If the box body is suddenly vibrated, the damping liquid will collide with the sealing plate, and then the buffer spring will be compressed. This can generate buffering. At the same time, under the action of inertia, the damping liquid will not move synchronously with the box body. This will cause the damping liquid to collide with the inner wall of the box body, thereby slowing down the movement of the box body.

Description

Technical Field

[0001] The present invention relates to the technical field of box girders, and in particular to a liquid damping device inside a box girder with strong adaptability and the box girder. Background Art

[0002] A box girder is a type of beam used in bridge engineering. It is hollow inside and has flanges on both sides of the upper part, similar to a box, hence the name box girder. When faced with strong winds, earthquakes, or traffic loads, the box girder may vibrate, seriously threatening the safety of the bridge. Therefore, in the prior art, dampers are provided to reduce vibration and isolate the bridge. For urban landscape bridges, on the one hand, the beam height of urban bridges is relatively small, and large-scale production products are difficult to adapt to customized box girder structures; on the other hand, external vibration isolation facilities will seriously affect the landscape of the bridge. At the same time, existing vibration isolation products are mostly telescopic vibration isolation components, and the effect is also very limited.

[0003] Box girders in the prior art are all provided with dampers to reduce vibrations on the bridge. However, the damping and shock absorbing mechanisms in the prior art are mostly telescopic shock absorbing mechanisms, which have limited effects. Summary of the Invention

[0004] The object of the present invention is to provide a box girder internal liquid damping device and a box girder with strong adaptability, which can better reduce the vibration of the bridge and thus ensure the safety performance of the bridge.

[0005] The embodiments of the present invention are achieved through the following technical solutions:

[0006] A highly adaptable internal liquid damping device for a box beam comprises a box body, a partition and a damping liquid arranged inside the box body; the partitions are provided in plurality and connected to the interior of the box body so that the partitions divide the interior of the box body into a plurality of chambers; the damping liquid is distributed inside the plurality of chambers.

[0007] Furthermore, assume that there are three spatial coordinates x, y and z; the partitions are distributed along the directions of the three axes x, y and z.

[0008] Furthermore, each surface of the chamber is provided with a flow hole to enable communication between two adjacent chambers.

[0009] Furthermore, several of the chambers are distributed in rows on the partition; the circulation holes are distributed in rows on the partition corresponding to each row of the chambers, so that the partition is provided with the circulation hole corresponding to each of the chambers; a rotating shaft is passed through the inside of the partition and the rotating shaft passes through the center of each of the circulation holes in a row; the rotating shaft is also provided with a sealing plate corresponding to each of the circulation holes, so that when the rotating shaft rotates, several of the sealing plates open or close their corresponding circulation holes.

[0010] Furthermore, a through hole for the rotation shaft to pass through is provided inside the partition; a plurality of rotating sleeves are provided in the through hole; the rotating sleeves are sleeved outside the rotation shaft; a plurality of buffer springs are provided between the rotating sleeves and the hole wall of the through hole; and the plurality of buffer springs are distributed circumferentially along the rotating sleeves.

[0011] Furthermore, the partitions are hermetically connected to each other to seal the chambers from each other; the damping liquid inside each chamber is two-thirds of the capacity of the chamber.

[0012] Furthermore, along any one of the x, y, and z axes, the widths of the plurality of chambers are different.

[0013] A concrete box girder includes the above-described box girder internal liquid damping device with strong adaptability; the inside of the box girder is hollow; the box body is arranged inside the box girder so that the box body fits against the inner wall of the box girder.

[0014] Furthermore, the box girder internal liquid damping device with strong adaptability is arranged in the middle of the box girder.

[0015] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0016] When the box girder internal liquid damping device with strong adaptability of the present invention is in use, if the box body is suddenly vibrated, the damping liquid will not move synchronously with the box body under the action of inertia. This will cause the damping liquid to collide with the inner wall of the box body, thereby slowing down the movement of the box body. Most importantly, the damping liquid will impact the sealing plate. And buffer springs are arranged outside the rotation shaft of the sealing plate, which enables the buffer springs to apply a buffer force. Thus, the buffer effect is better. And the sealing plate can be opened or closed according to the drive of the motor to change the communication relationship inside the box body. This also changes the frequency at which the box body can be buffered. Thus, it can actively adapt to vibrations of different frequencies.

[0017] In addition, since a plurality of partitions are provided inside the box body and the inside of the box body is divided into a plurality of chambers, the movement of the damping liquid in the chambers will greatly increase the number of collisions with the partitions. Thus, a greater buffer force is formed inside the box body, making the buffer effect better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 This is a schematic diagram of the cooperation between the damper of the present invention and the box girder;

[0020] Figure 2 This is a schematic diagram of the structure of the damper inside the box girder;

[0021] Figure 3 This is a schematic diagram of the cooperation between the rotating shaft and the partition plate;

[0022] Figure 4 This is a schematic diagram of the partition plate;

[0023] Figure 5 This is a cross-sectional view of the partition plate.

[0024] Icon: 1 - box body, 2 - partition plate, 21 - circulation hole, 22 - through hole, 23 - rotating sleeve, 3 - damping liquid, 4 - rotating shaft, 5 - buffer spring, 6 - box girder, 7 - driving device, 8 - sealing plate, 9 - chamber. Specific embodiments

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0027] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] In the description of the present invention, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0029] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, if the terms "set", "installed", "connected", "coupled" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Embodiment 1:

[0031] As Figures 1 - 5 shown, the present invention provides a liquid damping device inside a box girder with strong adaptability, including a box body 1, a partition 2, and a damping liquid 3 arranged inside the box body 1. The box body 1 is a sealed box body 1, which can avoid the leakage of the damping liquid 3 inside it. A plurality of partitions 2 are provided and connected to the inside of the box body 1, so that the plurality of partitions 2 divide the inside of the box body 1 into a plurality of chambers 9. The damping liquid 3 inside the box body 1 is distributed inside the plurality of chambers 9.

[0032] When the liquid damping device inside the box girder with strong adaptability of the present invention is in use, if the box body 1 is suddenly vibrated, the damping liquid 3 will not move synchronously with the box body 1 under the action of inertia. This will cause the damping liquid 3 to collide with the inner wall of the box body 1, thereby slowing down the movement of the box body 1. Furthermore, it will cause a certain buffer and can reduce vibration. Since a plurality of partitions 2 are arranged inside the box body 1 and the inside of the box body 1 is divided into a plurality of chambers 9, the movement of the damping liquid 3 in the chambers 9 will greatly increase the number of collisions with the partitions 2. Furthermore, a greater buffering force is formed inside the box body 1, making the buffering effect better. In practice, the more chambers 9 inside the box body 1, the more collisions, which is more conducive to generating a buffering effect.

[0033] At the same time, by adopting the method of filling the damping liquid 3 inside the box body 1, the shape and size of the entire damping device can be set according to needs. As long as it is ensured that a sufficient amount of the damping liquid 3 participates in vibration reduction. That is to say, if the shape and size of the box girder 6 are different, we only need to set a box body 1 with a suitable shape and size in the space inside the box girder 6. Furthermore, it can adapt to different types, different shapes, and different sizes of box girders 6.

[0034] In this embodiment, the three spatial coordinates x, y, and z are set. A plurality of partitions 2 are distributed along the directions of the x, y, and z axes. That is to say, the plurality of chambers 9 are distributed in a grid shape in the three-dimensional space. This also enables the damper to absorb vibrations in all directions and thereby buffer vibrations in all directions.

[0035] In this embodiment, each surface of the chamber 9 is provided with a flow hole 21 to communicate between two adjacent chambers 9. Since every two adjacent chambers 9 are communicated through the flow hole 21, all the chambers 9 are communicated through the flow hole 21. Thus, all the chambers 9 form an integral body. When encountering vibration, the damping liquid 3 in the box body 1 flows between the chambers 9.

[0036] In this embodiment, since the chamber 9 is separated by a plurality of partition plates 2, and the partition plates 2 are in a plate shape, a plurality of chambers 9 are arranged in rows on the partition plates 2. The partition plates 2 are provided with flow holes 21 in rows corresponding to each row of chambers 9, so that each partition plate 2 is provided with a flow hole 21 corresponding to each chamber 9. A rotating shaft 4 is penetrated inside the partition plate 2, and the rotating shaft 4 passes through the centers of each flow hole 21 in a row. Specifically, a through hole 22 for the rotating shaft 4 to pass through is arranged inside the partition plate 2. The through hole 22 communicates with each flow hole 21 in a row. After the rotating shaft 4 passes through the through hole 22, it can pass through the centers of each flow hole 21. The rotating shaft 4 is further provided with a sealing plate 8 corresponding to each flow hole 21. The sealing plate 8 is fixedly connected to the rotating shaft 4 and is located inside the flow hole 21. When the rotating shaft 4 rotates, a plurality of sealing plates 8 rotate with the rotating shaft 4, thereby opening or closing the corresponding flow holes 21. In practice, the size of the sealing plate 8 is equivalent to the size of the flow hole 21, so that the sealing plate 8 can just be placed inside the flow hole 21.

[0037] In actual use, if the communication relationship between the chambers 9 is fixed, the vibration frequency at which the entire box body 1 can effectively buffer is fixed. However, in practice, the vibration frequency of the box girder 6 is related to the current environment, that is, it changes in real time. When in use, the required communication relationship between the chambers 9 can be calculated according to the current or predicted vibration frequency, and then some flow holes 21 can be adjusted to be opened and some flow holes 21 to be closed according to the requirements. By rotating the rotating shaft 4, the corresponding sealing plate 8 can be adjusted to open or close the channel. If the flow hole 21 is opened, the thrust generated by the damping liquid 3 on the partition plate 2 where the flow hole 21 is located can be reduced, thereby reducing the buffering force. Therefore, the required buffering force can be calculated, and then some flow holes 21 can be adjusted to be opened or closed. In addition, after the buffer liquid enters the adjacent chamber 9 through the flow hole 21, the flow hole 21 can be timely sealed, thereby avoiding the backflow of the damping liquid 3. This enables the position of the damping liquid 3 in the box body 1 to be adjusted as needed. This also makes the position of the buffering force change during the vibration process, thereby making the buffering effect also change accordingly. This also makes the adjustable parameters of the damper more abundant. The adjustment of the buffering force is also more diversified. By actively adjusting the communication relationship between the chambers 9, the effect of active vibration resistance can be achieved.

[0038] To conveniently rotate the rotating shaft 4 and thus adjust the opening and closing state of the flow hole 21, a driving device 7 is correspondingly provided for each rotating shaft 4. The driving device 7 can adopt a conventional motor or other power equipment as long as it can drive the rotating shaft 4 to rotate normally.

[0039] In this embodiment, a plurality of rotating sleeves 23 are arranged in the through hole 22. The rotating sleeve 23 is sleeved outside the rotating shaft 4. The rotating sleeve 23 can be a copper sleeve with an inner diameter equivalent to the outer diameter of the turning part, so that the rotating channel is sleeved outside the turning part and can rotate relative to the rotating shaft 4. In addition, the rotating sleeve 23 can also be a rotating bearing or other components as long as it ensures that the rotating shaft 4 can rotate smoothly. A plurality of buffer springs 5 are arranged between the rotating sleeve 23 and the hole wall of the through hole 22. The plurality of buffer springs 5 are distributed along the circumferential direction of the rotating sleeve 23. This enables the turning part to be buffered by the spring when subjected to a radial force. If the motor does not actively adjust the opening and closing state of the sealing plate 8 for the flow hole 21 and only buffers through the buffer springs 5, this method can be regarded as passive anti-vibration.

[0040] In actual use, the flow of the damping liquid 3 will exert a thrust on the sealing plate 8. These thrusts are buffered by the springs, thereby extending the service life. At the same time, the buffering of the springs will also counteract the thrust of the damping liquid 3. This further forms a more complex mechanical system inside the box body 1, making the buffering effect better.

[0041] Embodiment 2:

[0042] This embodiment is an alternative to Embodiment 1. The difference between this embodiment and Embodiment 1 is that the partitions 2 are hermetically connected to each other so that the chambers 9 are sealed from each other. This makes the buffering generated by the damping liquid 3 inside each chamber 9 independent of each other. The damping liquid 3 inside each chamber 9 is two-thirds of the capacity of that chamber 9. There are gaps left in the chamber 9, enabling the damping liquid 3 to effectively impact the inner wall of the chamber 9 during vibration, thereby forming an effective buffering force. And the magnitude of this buffering force is equal to the sum of the buffering forces of a number of chambers 9.

[0043] In this embodiment, along any one of the x, y, and z axes, the widths of a number of chambers 9 are different. In actual use, the damping liquid 3 inside the smaller chamber 9 reaches the inner wall of the chamber 9 first, thereby generating a buffering force first. And the damping liquid 3 inside the larger chamber 9 reaches the inner wall of the chamber 9 later to generate a buffering force. This makes the buffering force reach gradually instead of applying a large buffering force all at once, making it more stable. At the same time, the movement rhythms of the damping liquid 3 inside each chamber 9 are different from each other, thereby achieving an effect of mutual restraint. This avoids the resonance phenomenon caused by the simultaneous occurrence and the same direction of the buffering forces in a number of chambers 9.

[0044] Embodiment 3:

[0045] This embodiment provides a box girder, including the box girder internal liquid damping device with strong adaptability in Embodiment 1 or Embodiment 2. The interior of the box girder 6 is hollow, the same as that of a conventional box girder 6. The box body 1 is arranged inside the box girder 6 so that the box body 1 fits against the inner wall of the box girder 6. Thus, the box body 1 is stably installed inside the box girder 6. Since the box girder internal liquid damping devices with strong adaptability in Embodiment 1 and Embodiment 2 both have good earthquake resistance effects. Therefore, the box girders containing these two dampers also have better earthquake resistance effects.

[0046] In this embodiment, the box girder internal liquid damping device with strong adaptability is arranged in the middle of the box girder 6. When an earthquake occurs or strong winds are encountered, the vibration of the middle part of the box girder 6 is generally stronger. Therefore, the box girder internal liquid damping device with strong adaptability is placed in the middle of the box girder 6 to better resist earthquakes.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An internally liquid damping device for box girders with strong adaptability, characterized in that: It includes a box body (1), a partition plate (2), and a damping liquid (3) arranged inside the box body (1); a plurality of partition plates (2) are provided and connected to the inside of the box body (1) so that the plurality of partition plates (2) divide the inside of the box body (1) into a plurality of chambers (9); the damping liquid (3) is distributed inside the plurality of chambers (9). Let there be three spatial coordinate axes x, y, and z; a plurality of the partition plates (2) are distributed along the directions of the x, y, and z axes; each surface of the chamber (9) is provided with a flow hole (21) so that two adjacent chambers (9) are communicated with each other. A plurality of the chambers (9) are arranged in rows on the partition plate (2); the partition plate (2) is provided with flow holes (21) in rows corresponding to each row of the chambers (9) so that the partition plate (2) is provided with the flow holes (21) corresponding to each chamber (9); a rotating shaft (4) penetrates through the inside of the partition plate (2) and the rotating shaft (4) passes through the centers of each flow hole (21) in a row; the rotating shaft (4) is further provided with sealing plates (8) corresponding to each flow hole (21) so that when the rotating shaft (4) rotates, a plurality of the sealing plates (8) open or close their corresponding flow holes (21). A through hole (22) for the rotating shaft (4) to pass through is arranged inside the partition plate (2); a plurality of rotating sleeves (23) are arranged inside the through hole (22); the rotating sleeves (23) are sleeved outside the rotating shaft (4); a plurality of buffer springs (5) are arranged between the rotating sleeves (23) and the hole wall of the through hole (22); the plurality of buffer springs (5) are distributed along the circumferential direction of the rotating sleeve (23).

2. The adaptable internal liquid damping device for box girders according to claim 1, wherein: The partition plates (2) are hermetically connected to each other so that the chambers (9) are sealed from each other; the damping liquid (3) inside each chamber (9) is two-thirds of the capacity of this chamber (9).

3. The adaptable internal liquid damping device for box girders according to claim 2, characterized in that: Along any one of the x, y, and z axes, the widths of a plurality of the chambers (9) are different from each other.

4. A box girder, characterized in that: It includes the adaptable liquid damping device inside the box girder according to any one of claims 1-3; the inside of the box girder (6) is hollow; the box body (1) is arranged inside the box girder (6) in a matching manner so that the box body (1) fits against the inner wall of the box girder (6).

5. The box girder according to claim 4, characterized in that: The adaptable liquid damping device inside the box girder is arranged in the middle of the box girder (6).

Images