Wind-induced vibration suppression device for inspection vehicle track for straight web steel box girder

Abstract

The invention discloses a wind-induced vibration suppression device for a maintenance vehicle track of a straight web steel box girder, which belongs to the technical field of bridge engineering, and comprises a steel box girder and a detection vehicle track arranged at the bottom of the steel box girder. Both sides of the detection vehicle track are provided with turbulence vibration suppression devices, and the turbulence vibration suppression device comprises a vertical back plate and a plurality of wind suppression plates, the vertical back plate is fixedly connected to the steel box girder, the wind suppression plates are evenly spaced along the length direction of the vertical back plate, the plane where the wind suppression plates are located forms a certain angle with the horizontal plane, the length direction of the wind suppression plates is along the longitudinal direction of the steel box girder, and the rotating rod is simultaneously connected with a rotary damping device, the wind suppression plate is used to break the airflow vortex, the wind suppression plate drives the rotating rod to rotate under the action of the airflow, the rotating rod acts on the rotary damping device, and energy is dissipated through the rotary damping device. The device of the invention can be used to break the airflow vortex at the maintenance vehicle track, reduce the vortex vibration amplitude of the box girder, and thus suppress the generation of wind-induced vibration on the steel box girder.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a wind-induced vibration suppression device for a maintenance vehicle track of a straight-web steel box girder. Background Art

[0002] With the continuous refinement of the wind-resistant design of bridges, researchers have found that in addition to the shape of the section itself, which will affect the wind-resistant stability of the structure, auxiliary measures such as railings and maintenance vehicle tracks are also important factors affecting the aerodynamic characteristics of the section. Through pressure measurement tests and flow field simulation studies, it was found that the position of the maintenance vehicle track has a significant impact on the separation point of the airflow, which is also the inherent mechanism for inducing structural vortex-induced vibration. Therefore, it is urgently necessary to provide a wind-induced vibration suppression device for the maintenance vehicle track of a straight-web steel box girder, which can be used to break up the airflow vortex at the maintenance vehicle track, thereby suppressing the generation of wind-induced vibration on the steel box girder. Summary of the invention

[0003] In view of this, the object of the present invention is to provide a wind-induced vibration suppression device for a maintenance vehicle track of a straight-web steel box girder, which can be used to break up the airflow vortex at the maintenance vehicle track, reduce the vortex vibration amplitude of the box girder, and thus suppress the generation of wind-induced vibration on the steel box girder.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] The wind-induced vibration suppression device for a maintenance vehicle track of a straight-web steel box girder of the present invention comprises a steel box girder and a detection vehicle track arranged at the bottom of the steel box girder, wherein turbulence vibration suppression devices are arranged on both sides of the detection vehicle track, and the turbulence vibration suppression device comprises a vertical back plate and a plurality of wind suppression plates, wherein the vertical back plate is fixedly connected to the steel box girder, the wind suppression plates are evenly spaced along the length direction of the vertical back plate, the plane where the wind suppression plates are located forms a certain angle with the horizontal plane, the length direction of the wind suppression plates is along the longitudinal direction of the steel box girder, a support is fixed on the back side of the wind suppression plates, the support is fixedly connected to a rotating rod, a support plate is arranged on the side of the vertical back plate away from the detection vehicle track, and the support plate rotates in cooperation with the rotating rod; the rotating rod is simultaneously connected to a rotation damping device, the wind suppression plate is used to break the airflow vortex, the wind suppression plate drives the rotating rod to rotate under the action of the airflow, and the rotating rod acts on the rotation damping device to dissipate energy through the rotation damping device.

[0006] Furthermore, the rotation damping device includes a large gear, a small gear, a rotating shaft, fan blades and a damping cylinder. The large gear is coaxially connected to the rotating rod, the small gear is meshed with the large gear and is coaxially connected to the rotating shaft at the same time, the rotating shaft is rotatably matched with the support plate, the damping cylinder is fixedly connected to the vertical back plate, the fan blades are transmission-connected to the rotating shaft and are rotatably arranged in the damping cylinder, and the damping cylinder is filled with damping fluid.

[0007] Furthermore, the vertical back plates are evenly spaced along the longitudinal direction of the steel box girder, a bracket is connected between two adjacent vertical back plates, and the damping cylinder is fixedly connected to the vertical back plates through the bracket.

[0008] Furthermore, a self-tapping screw is provided at the upper end of the vertical back plate, and the vertical back plate is fixedly connected to the steel box girder through the self-tapping screw. A rib plate is also connected to the back side of the vertical back plate, and the upper end of the rib plate is connected to the steel box girder, forming a triangular support between the rib plate and the vertical back plate.

[0009] Furthermore, a through hole is opened in the middle of the wind suppression plate, a guide rod is movably inserted into the through hole, the guide rods between two adjacent wind suppression plates are connected by a connecting plate, and a first limiting portion and a second limiting portion are respectively provided at both ends of the guide rod, and the guide rods located at the uppermost and lowermost sides of the turbulence vibration suppression device are both connected to the steel box girder.

[0010] Furthermore, the guide rods located at the uppermost side and the lowermost side of the turbulence vibration suppression device are connected to the steel box girder through cables, and the cables can adjust the tensioning length.

[0011] Furthermore, the end of the cable is connected to a threaded rod, the bottom of the steel box girder is fixedly connected to a beam plate, the beam plate is provided with a connecting hole for the threaded rod to pass through, and the threaded rod is threadedly connected to an anchor head.

[0012] Furthermore, the through hole is an elliptical hole, and the length direction of the elliptical hole is along the transverse direction of the wind suppression plate.

[0013] The beneficial effects of the present invention are:

[0014] The wind-induced vibration suppression device for the inspection vehicle track of the straight-web steel box girder of the present invention is provided with turbulence suppression devices on both sides of the inspection vehicle track. When the airflow passes through the bottom surface of the steel box girder, the airflow vortex can be broken up by the wind suppression plates to prevent the airflow from forming a vortex at the inspection vehicle track, thereby increasing the vertical vortex vibration stability of the steel box girder and avoiding the occurrence of wind-induced vibration problems such as vortex vibration and flutter.

[0015] In the device of the present invention, the wind suppression plate plays the role of facing the wind and breaking the wind. After receiving the wind force, it can drive the rotating rod to rotate. The rotating rod acts on the rotary damping device to dissipate energy through the rotary damping device, thereby avoiding the damage caused by the impact of strong airflow on the wind suppression plate, achieving a better wind blocking effect and increasing the life of the device.

[0016] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0018] Figure 1 It is a structural schematic diagram of the device of the present invention;

[0019] Figure 2 for Figure 1 A magnified view at point A;

[0020] Figure 3 The structure diagram of the turbulence vibration suppression device Figure 1 ;

[0021] Figure 4 The structure diagram of the turbulence vibration suppression device Figure 2 ;

[0022] Figure 5 is a side view of the turbulence vibration suppression device;

[0023] Figure 6 is a schematic diagram of the structure of the guide rod;

[0024] Figure 7 It is the structural diagram of the damping cylinder.

[0025] The markings in the accompanying drawings are as follows: steel box girder 1, inspection vehicle track 2, turbulence vibration suppression device 3, vertical back plate 4, wind suppression plate 5, support 6, rotating rod 7, support plate 8, large gear 9, small gear 10, rotating shaft 11, fan blade 12, damping cylinder 13, damping fluid 14, bracket 15, self-tapping screw 16, rib 17, through hole 18, guide rod 19, connecting plate 20, first limiting part 21, second limiting part 22, cable 23, threaded rod 24, beam plate 25, anchor head 26. DETAILED DESCRIPTION

[0026] like Figures 1-2 As shown, the wind-induced vibration suppression device for the inspection vehicle track of the straight-web steel box girder 1 of the present invention comprises a steel box girder 1 and an inspection vehicle track 2 arranged at the bottom of the steel box girder 1, both sides of the steel box girder 1 are provided with existing vibration suppression units, the inspection vehicle track 2 is divided into two groups, and both sides of the inspection vehicle track 2 are provided with turbulence vibration suppression devices 3, and the turbulence vibration suppression devices 3 of the present invention also correspond to two groups, which are respectively located on the outsides of the two groups of inspection vehicle tracks 2.

[0027] Specifically, Figures 3 to 5As shown, the turbulence vibration suppression device 3 of the present invention includes a vertical back plate 4 and a plurality of wind suppression plates 5. The normal direction of the plane where the vertical back plate 4 is located is along the longitudinal direction of the steel box girder 1, and the height is greater than the height of the inspection vehicle track 2. The vertical back plate 4 is fixedly connected to the steel box girder 1, and the wind suppression plates 5 are evenly spaced along the length direction of the vertical back plate 4. The plane where the wind suppression plates 5 are located forms a certain angle with the horizontal plane. In this embodiment, there are 6 groups of wind suppression plates 5, and their arrangement direction and form are consistent. The length direction of the wind suppression plates 5 is along the longitudinal direction of the steel box girder 1. A support 6 is fixed to the back side of the wind suppression plate 5, and the support 6 is fixedly connected to a rotating rod 7, and the rotating rod 7 is perpendicular to the plane of the vertical back plate 4.

[0028] A support plate 8 is provided on the side of the vertical back plate 4 away from the inspection vehicle track 2. The support plates 8 of each group of vertical back plates 4 correspond to the rotating rods 7 one by one, and the support plates 8 and the rotating rods 7 rotate in coordination; the rotating rods 7 are also connected to a rotation damping device, which can adopt a conventional rotation damper to play a damping role during rotation and buffer the sudden change of rotation. The wind suppression plate 5 is used to break the airflow vortex. The wind suppression plate 5 drives the rotating rods 7 to rotate under the action of the airflow, and the rotating rods 7 act on the rotation damping device, thereby dissipating energy through the rotation damping device.

[0029] In this embodiment, the rotary damping device includes a large gear 9, a small gear 10, a rotating shaft 11, a fan blade 12 and a damping cylinder 13. The diameter and number of teeth of the large gear 9 are greater than the diameter and number of teeth of the small gear 10. When the large gear 9 rotates half a circle, the small gear 10 rotates at least 3 circles to achieve the effect of speeding up, so that the buffering effect of the rotary damping device is more sensitive. Specifically, the connection method is that the large gear 9 is coaxially connected with the rotating rod 7 and can rotate with the rotating rod 7. The small gear 10 is meshed with the large gear 9 and is coaxially connected with the rotating shaft 11 at the same time. It can rotate with the rotating shaft 11. The rotating shaft 11 is rotated with the support plate 8. The damping cylinder 13 is fixedly connected to the vertical back plate 4. The fan blade 12 is transmission-connected with the rotating shaft 11 and is rotatably arranged in the damping cylinder 13. The damping cylinder 13 is filled with damping fluid 14. When the wind suppression plate 5 drives the rotating rod 7 to rotate under the action of the airflow, the rotating rod 7 drives the large gear 9 to rotate together, and the large gear 9 drives the rotating shaft 11 to rotate through the small gear 10. Figure 7 As shown, the rotating shaft 11 can drive the fan blades 12 to rotate. When the fan blades 12 rotate, they can stir the damping fluid 14 in the damping cylinder 13 to play a buffering role.

[0030] In this embodiment, the vertical back plates 4 are evenly spaced along the longitudinal direction of the steel box girder 1. Of course, according to actual needs, a suitable number of turbulence vibration suppression devices 3 can be arranged on a single side. One set of turbulence vibration suppression devices 3 corresponds to three vertical back plates 4, and a bracket 15 is connected between two adjacent vertical back plates 4. The damping cylinder 13 is fixedly connected to the vertical back plates 4 through the bracket 15, which can play a role in fixing it.

[0031] In this embodiment, the vertical back plate 4 is provided with self-tapping screws 16, and the upper end of the vertical back plate 4 is fixedly connected to the steel box girder 1 through the self-tapping screws 16. The vertical back plate 4 is in the shape of a long plate, which can avoid blocking the airflow and can better ventilate the wind. The back side of the vertical back plate 4 is also connected to a rib plate 17, and the upper end of the rib plate 17 is connected to the steel box girder 1. A triangular support is formed between the rib plate 17 and the vertical back plate 4, which is more conducive to the fixation of the vertical back plate 4 and plays a better fixing role on the entire device.

[0032] In this embodiment, Figure 3 and 6 As shown, a through hole 18 is provided in the middle of the wind suppression plate 5, and a guide rod 19 is movably provided in the through hole 18. The guide rods 19 between two adjacent wind suppression plates 5 are connected by a connecting plate 20. The first limiting portion 21 and the second limiting portion 22 are respectively provided at both ends of the guide rod 19. The guide rod 19 between the first limiting portion 21 and the second limiting portion 22 can pass through the through hole 18 up and down, so that the wind suppression plate 5 has a certain flipping activity space. The first limiting portion 21 and the second limiting portion 22 are used to limit the wind suppression plate 5, avoiding the jamming problem caused by excessive flipping of the wind suppression plate 5. The guide rods 19 at the uppermost and lowermost sides of the turbulence vibration suppression device 3 are both connected to the steel box girder 1, and the initial position of the guide rods 19 can be limited. Among them, the guide rods 19 at the uppermost and lowermost sides of the turbulence vibration suppression device 3 are both connected to the steel box girder 1 through the cable 23, and the cable 23 can adjust the tension length to make adaptive adjustments during installation, avoiding installation problems caused by assembly errors.

[0033] In this embodiment, the end of the cable 23 is connected to a threaded rod 24, and the bottom of the steel box girder 1 is fixedly connected to a beam plate 25. A connecting hole for the threaded rod 24 to pass through is opened on the beam plate 25. An anchor head 26 is threadedly connected to the threaded rod 24. The outer end of the threaded rod 24 is limited by the anchor head 26, and the inner end is fixedly connected to the cable 23, which can be easily adjusted. The device has a simple structure, is more conducive to maintenance, and has lower costs.

[0034] In this embodiment, the through hole 18 is an elliptical hole, and the length direction of the elliptical hole is along the transverse direction of the wind suppression plate 5, which can form a movable space between the guide rod 19 and the wind suppression plate 5 to avoid interference.

[0035] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A wind-induced vibration suppression device for a maintenance vehicle track of a straight web steel box girder, comprising a steel box girder and a maintenance vehicle track arranged at the bottom of the steel box girder, characterized in that: Turbulence vibration suppression devices are provided on both sides of the detection vehicle track, and the turbulence vibration suppression devices include a vertical back plate and a plurality of wind suppression plates. The vertical back plate is fixedly connected to the steel box girder, and the wind suppression plates are evenly spaced along the length direction of the vertical back plate. The plane where the wind suppression plates are located forms a certain angle with the horizontal plane, and the length direction of the wind suppression plates is along the longitudinal direction of the steel box girder. A support is fixed on the back side of the wind suppression plate, and the support is fixedly connected to a rotating rod. A support plate is provided on the side of the vertical back plate away from the detection vehicle track, and the support plate rotates in cooperation with the rotating rod; the rotating rod is also connected to a rotation damping device, and the wind suppression plate is used to break the airflow vortex. The wind suppression plate drives the rotating rod to rotate under the action of the airflow, and the rotating rod acts on the rotation damping device to dissipate energy through the rotation damping device; the wind suppression plate A through hole is provided in the middle part, and a guide rod is movably inserted in the through hole. The guide rods between two adjacent wind suppression plates are connected by a connecting plate. A first limiting part and a second limiting part are respectively provided at both ends of the guide rod. The guide rod part between the first limiting part and the second limiting part can pass through the through hole up and down, so that the wind suppression plate has a certain flipping and movable space. The first limiting part and the second limiting part are used to limit the wind suppression plate. The guide rods located at the uppermost and lowermost sides of the turbulence vibration suppression device are both connected to the steel box girder; the guide rods located at the uppermost and lowermost sides of the turbulence vibration suppression device are both connected to the steel box girder through a cable, and the cable can adjust the tensioning length; the end of the cable is connected to a threaded rod, and the bottom of the steel box girder is fixedly connected to a beam plate, and a connecting hole for the threaded rod to pass through is provided on the beam plate, and an anchor head is threadedly connected to the threaded rod.

2. The wind-induced vibration suppression device for the inspection vehicle track of a straight web steel box girder according to claim 1 is characterized in that: The rotary damping device includes a large gear, a small gear, a rotating shaft, fan blades and a damping cylinder. The large gear is coaxially connected to the rotating rod, the small gear is meshed with the large gear and is coaxially connected to the rotating shaft at the same time, the rotating shaft is rotatably matched with the support plate, the damping cylinder is fixedly connected to the vertical back plate, the fan blades are transmission-connected to the rotating shaft and are rotatably arranged in the damping cylinder, and the damping cylinder is filled with damping fluid.

3. The wind-induced vibration suppression device for the inspection vehicle track of a straight web steel box girder according to claim 2 is characterized in that: The vertical back plates are evenly spaced along the longitudinal direction of the steel box girder, a bracket is connected between two adjacent vertical back plates, and the damping cylinder is fixedly connected to the vertical back plates through the bracket.

4. The wind-induced vibration suppression device for the inspection vehicle track of a straight web steel box girder according to claim 3 is characterized in that: The upper end of the vertical back plate is provided with self-tapping screws, and the vertical back plate is fixedly connected to the steel box girder through the self-tapping screws. The back side of the vertical back plate is also connected to a rib plate, and the upper end of the rib plate is connected to the steel box girder, forming a triangular support between the rib plate and the vertical back plate.

5. The wind-induced vibration suppression device for the inspection vehicle track of a straight web steel box girder according to claim 1 is characterized in that: The through hole is an elliptical hole, and the length direction of the elliptical hole is along the transverse direction of the wind suppression plate.

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