Bridge viscous damping shock absorption structure

Abstract

The utility model belongs to the technical field of bridge construction engineering application, and particularly discloses a bridge viscous damping shock absorption structure which is composed of a viscous damping structure set and a seat body, the viscous damping structure set comprises an end plate and at least one viscous damper connected to the end plate, the seat body is used for being installed on a beam plate of a bridge, and the viscous damper is connected to the end plate. The end plate is used for being installed on the side face of the pier, and the end, away from the end plate, of the viscous damper is installed on the seat body. The bridge damping device has the advantages that when external force borne by a bridge is within the design range, the piston is mainly located in the middle section of the damping shaft when moving in the piston cavity; when the external force borne by the bridge exceeds the design range, the piston can deviate from the middle section of the damping shaft and reach the two ends of the damping shaft when moving, at the moment, due to the fact that the gap between the damping shaft and the damping through hole becomes small, damping force exceeding the design specification can be provided, and the viscous damper can still play a role to continue to protect the bridge.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction engineering application, and in particular relates to a bridge viscous damping shock-absorbing structure. Background Art

[0002] Dampers are commonly used shock-absorbing components in modern bridge engineering. In order to adapt to different operating conditions and areas of use, people have proposed dampers of various structures. Viscous dampers can absorb external forces while ensuring their own safety, and have been widely used in shock-absorbing technology of bridge engineering.

[0003] The output of conventional viscous dampers is designed in accordance with relevant technical specifications, but in real life, the vibrations caused by earthquakes or strong winds often exceed the specified design specifications. When the vibration exceeds the range specified in the design specifications, the displacement of the viscous damper will exceed the design range and lose its protective function. It is necessary to design the viscous damper to meet the energy consumption requirements of the multi-level seismic resistance target of the bridge structure.

[0004] Therefore, based on the above problems, the utility model provides a bridge viscous damping shock absorbing structure. Utility Model Content

[0005] Purpose of the utility model: The purpose of the utility model is to provide a bridge viscous damping shock absorption structure to solve the technical problems existing in the background technology.

[0006] Technical solution: The utility model provides a bridge viscous damping shock-absorbing structure, which is composed of a viscous damping structure group and a seat body, the viscous damping structure group includes an end plate and at least one viscous damper connected to the end plate, the seat body is used to be installed on the beam plate of the bridge, the end plate is used to be installed on the side of the pier, and the end of the viscous damper away from the end plate is installed on the seat body;

[0007] The viscous damper comprises a cylinder and an axially movable piston, wherein a piston cavity is formed in the cylinder, the piston is located in the piston cavity, a plurality of circular damping through holes are opened on the piston, a damping shaft is fixedly installed in the cylinder, the damping shaft freely passes through the damping through hole and is coaxially arranged with the damping through hole, a gap is provided between the damping shaft and the damping through hole, and along the axial direction, the diameter of the damping shaft gradually increases from the middle part to both ends; a piston rod is fixedly connected to the piston, and a damping medium is filled in the piston cavity.

[0008] When the bridge is vibrated by external impact, it can drive the piston rod and piston to reciprocate, so that the damping medium can flow through the gap between the damping through hole and the damping shaft, dissipating the load input by the external force in the form of heat, thereby achieving the purpose of protecting the safety of the bridge.

[0009] In the technical solution, a damping shaft is provided and the diameter of the damping shaft is gradually increased from the middle portion to both ends, so that the gap between the damping shaft and the damping through hole is gradually reduced from the middle portion to both ends.

[0010] After the viscous damper is installed between the bridge deck and the pier and the debugging is completed, the piston is located in the middle of the piston cavity. When the external force on the bridge is within the design range, the piston is mainly in the middle section of the damping shaft when it moves in the piston cavity; when the external force on the bridge exceeds the design range, the piston can deviate from the middle section of the damping shaft when it moves and reach both ends of the damping shaft. At this time, since the gap between the damping shaft and the damping through hole becomes smaller, it can provide a damping force exceeding the design specification, so that the viscous damper can still play a role and continue to protect the bridge.

[0011] In the technical solution, in order to give full play to the role of each damping through hole, a damping shaft is provided corresponding to each damping through hole.

[0012] In the technical solution, the damping shaft includes a middle section and an expanded diameter section formed at both ends of the middle section. The outer peripheral surface of the middle section is cylindrical, the outer diameter of the middle section remains unchanged, and the diameter of the expanded diameter section gradually increases from one end toward the middle section to the end away from the middle section. The middle section in this design is mainly used to consume external forces within the design range. A conventional design is adopted to achieve a uniform output effect using the middle section.

[0013] In the technical solution of the present invention, the generatrix of the expanded diameter section is an elliptical line segment, the starting point of the elliptical line segment is located at the connection between the expanded diameter section and the middle section, and the end point of the elliptical line segment is located at the end of the expanded diameter section away from the middle section; the elliptical line segment is located on the elliptical line between two adjacent quadrant points of an ellipse; the starting point of the elliptical line segment is located at a quadrant point on the minor axis of the ellipse, and the end point of the elliptical line segment is located between the quadrant point on the minor axis and the quadrant point on the major axis of the ellipse, or the end point of the elliptical line segment is located at a quadrant point on the major axis of the ellipse.

[0014] This design enables the curvature of the busbar of the expanded diameter section to gradually increase from the inside to the outside. On the expanded diameter section, the farther away from the middle section, the larger its diameter, the smaller the gap between it and the damping through hole, and the more it can resist greater external forces. As a result, the viscous damper can resist the impact of different levels of external forces on the bridge.

[0015] In order to eliminate the defects caused by processing errors, the outer diameter of the middle section of the present technical solution is 80-95% of the inner diameter of the damping through hole. This design can ensure that the piston can move smoothly in the middle section, avoiding unnecessary friction between the damping through hole and the damping shaft, which affects the service life of the equipment.

[0016] In the technical solution, in order to enable the viscous damper to fully absorb the external force within the design range, the length of the expanded diameter section is 10-25% of the length of the damping shaft.

[0017] Compared with the prior art, the beneficial effect of a bridge viscous damping shock-absorbing structure of the utility model is that: when the external force applied to the bridge is within the design range, the piston is mainly in the middle section of the damping shaft when moving in the piston cavity; when the external force applied to the bridge exceeds the design range, the piston can deviate from the middle section of the damping shaft when moving and reach both ends of the damping shaft. At this time, since the gap between the damping shaft and the damping through hole becomes smaller, a damping force exceeding the design specification can be provided, so that the viscous damper can still function and continue to protect the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the installation structure of a bridge viscous damping shock absorbing structure of the utility model on a bridge;

[0020] Figure 2 It is a structural schematic diagram of the seat body, end plate, etc. of the utility model.

[0021] Figure 3 for Figure 2 Top view of the .

[0022] Figure 4 Schematic diagram of the structure of the viscous damper.

[0023] Figure 5 It is the structural diagram of the damping shaft.

[0024] Figure 6 for Figure 5 A magnified view of part A;

[0025] Among them, the serial numbers in the figure are as follows: 11-beam plate, 12-bridge pier, 13-seat body, 14-first hinge seat, 15-first bolt, 21-end plate, 22-second hinge seat, 23-bolt, 24-second bolt, 300-viscous damper, 31-cylinder, 311-piston chamber, 321-first end cover, 322-second end cover, 323-sealing ring, 331-locking nut, 332-auxiliary cylinder, 333-accommodating chamber, 341 -first connecting ear, 342-second connecting ear, 343-first connecting hole, 344-second connecting hole, 35-piston rod, 351-mounting end, 36-piston, 361-damping through hole, 37-damping shaft, 371-middle section, 372 first expanded diameter section, 373-second expanded diameter section, 374-starting point, 375-end point, 41-ellipse, 42-major axis, 43-minor axis, 44-second quadrant point, 45-first quadrant point. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "top", "bottom", "side"

[0028] The directions or positional relationships indicated by “the other side”, “the front”, “the back”, “the middle part”, “the inside”, “the top”, “the bottom”, etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; the terms “first”, “second”, and “third” are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms “installed”, “connected”, and “connected” 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. 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.

[0029] Example

[0030] See also Figure 1-Figure 5A bridge viscous damping shock-absorbing structure is composed of a viscous damping structure group and a seat body 13. The viscous damping structure group includes an end plate 21 and four viscous dampers 300 connected to the end plate 21. The seat body 13 is used to be installed on the lower side of the beam slab 11 of the bridge. The end plate 21 can be installed on the side of the pier 12 through connecting bolts 23. The end of the viscous damper away from the end plate 21 is installed on the seat body 13.

[0031] The viscous damper 300 includes a cylinder 31 and an axially movable piston 36. A first end cover 321 and a locking nut 331 for pressing the first end cover 321 into the cylinder 31 are provided at one end of the cylinder 31. A second end cover 322 and a secondary cylinder 332 for pressing the second end cover 322 into the cylinder 31 are provided at the other end of the cylinder 31. A sealing ring 323 is provided between the first end cover 321 and the cylinder 31, and between the second end cover 322 and the cylinder 31. The secondary cylinder 332 is screwed onto the cylinder 31 in a threaded manner, and a receiving chamber 333 is provided in the secondary cylinder.

[0032] In the cylinder 31, the space between the first end cover 321 and the second end cover 322 forms a piston chamber 311, and one end of the piston rod 35 tightly passes through the first end cover 321 and the locking nut 331 and then extends out of the cylinder 31 to form a mounting end 351, and a first connecting ear 341 is threadedly installed on the mounting end 351, and a first connecting hole 343 is opened on the first connecting ear 341; one end of the piston rod 35 tightly passes through the second end cover 322 and then extends into the accommodating chamber 333; the piston 36 is located in the piston chamber 311 and is fixedly mounted on the piston rod 35, and the piston 36 is coaxially arranged with the piston rod 35. Driven by the piston rod 35, the piston 36 can reciprocate in the piston chamber 311 along the axial direction of the cylinder 31.

[0033] The piston cavity 311 is filled with a damping medium, which is not shown in the accompanying drawings and does not affect the disclosure of the technical solution of the present application.

[0034] The second connecting ear 342 is screwed onto the end of the auxiliary cylinder 332 away from the cylinder barrel 31 in a threaded manner, and a second connecting hole 344 is formed on the second connecting ear 342 .

[0035] The piston 36 is provided with eight circular damping through holes 361, each of which extends along the axial direction of the cylinder 31 and is evenly spaced around the piston rod 35. Corresponding to each damping through hole 361, a damping shaft 37 is provided, and each damping shaft 37 freely passes through the corresponding damping through hole 361, with a gap between the damping shaft 37 and the damping through hole 361, and along the axial direction, the diameter of the damping shaft 37 gradually increases from the middle part to both ends.

[0036] In this embodiment, each damping shaft 37 includes a middle section 371 and expanded diameter sections formed at both ends of the middle section. For the convenience of description, the two expanded diameter sections are respectively referred to as the first expanded diameter section 372 and the second expanded diameter section 373. In the accompanying drawings, the first mark L represents the range of the middle section, the second mark M represents the range of the first expanded diameter section, and the third mark S represents the range of the second expanded diameter section.

[0037] The outer peripheral surface of the middle section is cylindrical, and the outer diameter of the middle section remains unchanged. The diameters of the two diameter-expanding sections gradually increase from one end toward the middle section to the end away from the middle section.

[0038] The outer diameter of the middle section is 90% of the inner diameter of the damping through hole.

[0039] The lengths of the first diameter-enlarged section and the second diameter-enlarged section are both 15% of the length of the damping shaft 37 .

[0040] In this embodiment, the structures of the two diameter expansion sections are the same and symmetrical to each other. The structure of the two diameter expansion sections is described below by taking the second diameter expansion section as an example; the generatrix of the second diameter expansion section is an elliptical line segment, the starting point 374 of the elliptical line segment is located at the connection between the second diameter expansion section and the middle section, and the end point 375 of the elliptical line segment is located at the end of the second diameter expansion section away from the middle section; the elliptical line segment is located on the elliptical line between two adjacent quadrant points of an ellipse 41.

[0041] Specifically, in this embodiment, the starting point 374 of the ellipse line segment is located at the first quadrant point 45 on the minor axis 43 of the ellipse 41, that is, the position of the starting point 374 coincides with the first quadrant point 45. The end point 375 of the ellipse line segment is located at the second quadrant point 44 on the major axis 42 of the ellipse 41, that is, the position of the end point 375 coincides with the second quadrant point 44.

[0042] To show clarity, Figure 6 In the figure, the starting point 374, the end point 375, the first quadrant point 45 and the second quadrant point 44 are all represented by a small circle. It can be understood that in other embodiments, the end point of the ellipse line segment can also be located between the quadrant point on the minor axis and the quadrant point on the major axis of the ellipse.

[0043] Corresponding to each viscous damper 300, a first articulated seat 14 is installed on the seat body 13. The first articulated seat 14 is composed of two first articulated ears arranged side by side. The first connecting ear 341 is inserted between the two first articulated ears. The first bolt 15 passes through the first connecting hole and connects the first connecting ear 341 to the corresponding first articulated seat 14.

[0044] Corresponding to each viscous damper 300, a second articulated seat 22 is installed on the end plate 21. The second articulated seat 22 is composed of two second articulated ears arranged side by side. The second connecting ear 342 is inserted between the two second articulated ears. The second bolt 24 passes through the second connecting hole to connect the second connecting ear 342 to the corresponding second articulated seat 22.

[0045] The structural principle or working principle of the earthquake-resistant structure of the bridge of this structure:

[0046] When the external force applied to the bridge 11 is within the design range, the piston 36 is mainly located in the middle section of the damping shaft 37 when moving in the piston chamber 311;

[0047] When the external force applied to the bridge exceeds the design range, the piston 36 can deviate from the middle section of the damping shaft 37 and reach both ends of the damping shaft 37 when moving. At this time, since the gap between the damping shaft 37 and the damping through hole 361 becomes smaller, a damping force exceeding the design specification can be provided, so that the viscous damper 300 can still function and continue to protect the bridge 11.

[0048] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0049] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A bridge viscous damping shock-absorbing structure, characterized in that: It consists of a viscous damping structure group and a seat; The viscous damping structure group includes an end plate and at least one viscous damper connected to the end plate, the seat body is used to be installed on the beam plate of the bridge, the end plate is used to be installed on the side of the pier, and the end of the viscous damper away from the end plate is installed on the seat body; The viscous damper comprises a cylinder and an axially movable piston, a piston cavity is formed in the cylinder, the piston is located in the piston cavity, a plurality of circular damping through holes are opened on the piston, a damping shaft is fixedly installed in the cylinder, the damping shaft freely passes through the damping through hole and is coaxially arranged with the damping through hole, a gap is provided between the damping shaft and the damping through hole, and along the axial direction, the diameter of the damping shaft gradually increases from the middle part to both ends; A piston rod is fixedly connected to the piston, and a damping medium is filled in the piston cavity.

2. The bridge viscous damping shock-absorbing structure according to claim 1, characterized in that: Corresponding to each damping through hole, a damping shaft is arranged.

3. A bridge viscous damping shock-absorbing structure according to claim 1 or 2, characterized in that: The damping shaft includes a middle section and expanded diameter sections formed at both ends of the middle section. The outer peripheral surface of the middle section is cylindrical, the outer diameter of the middle section remains unchanged, and the diameter of the expanded diameter section gradually increases from one end toward the middle section to the end away from the middle section.

4. The bridge viscous damping shock-absorbing structure according to claim 3 is characterized in that: The generatrix of the diameter expansion section is an ellipse segment, the starting point of the ellipse segment is located at the connection between the diameter expansion section and the middle section, and the end point of the ellipse segment is located at the end of the diameter expansion section away from the middle section; An ellipse line segment is located on the ellipse line between two adjacent quadrant points of an ellipse; The starting point of the ellipse line segment is located at a quadrant point on the minor axis of the ellipse, the end point of the ellipse line segment is located between the quadrant point on the minor axis and the quadrant point on the major axis of the ellipse, or the end point of the ellipse line segment is located at a quadrant point on the major axis of the ellipse.

5. The bridge viscous damping shock-absorbing structure according to claim 3 is characterized in that: The outer diameter of the middle section is 90-98% of the inner diameter of the damping through hole.

6. The bridge viscous damping shock-absorbing structure according to claim 3 is characterized in that: The length of the expanded diameter section is 10-25% of the length of the damping shaft.

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