A movable cable-stayed cable vibration damping damper and cable-stayed cable vibration damping system

Abstract

The application provides a movable cable-stayed cable damping damper and a cable-stayed cable damping system, which comprise a damper body, a control circuit board and a plurality of rollers. The damper body is tubular. The plurality of rollers are arranged in the interior of the damper body. The plurality of rollers are matched with the cable to enable the plurality of rollers to roll along the cable. The rollers are electrically connected to the control circuit board to enable the control circuit board to control the rotation of the rollers. In use, the control circuit board controls the rotation of the rollers, thereby enabling the entire damper to move along the cable. In practice, the material, interface and length of the cable determine the frequency of its inherent vibration. If the frequency of the external time-varying load is the same as the inherent frequency of the cable, the cable will resonate. At this time, if the damper moves along the cable, on the one hand, the vibration length can be changed, thereby changing the inherent vibration frequency; on the other hand, damping can be provided at a more effective position, thereby effectively avoiding resonance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge dampers, in particular to a movable cable-stayed damping damper and a cable-stayed damping system. BACKGROUND

[0002] With the steady advancement of infrastructure construction in China, the number of sea-crossing bridges and valley-crossing bridges is gradually increasing, and cable-supported bridges are widely used due to their strong crossing capacity. Whether it is a sea-crossing bridge or a valley-crossing bridge, it will face severe and harsh wind environment. For cable-supported bridges, the wind resistance of each component is a key factor in design. Among them, the cable of the cable-stayed bridge is light in weight and small in stiffness, and is prone to galloping vibration under the action of incoming wind speed. Long-term and large-scale vibration caused by galloping will lead to fatigue of the cable and the cable anchoring component, further increasing the risk of cable fracture and the maintenance and operation cost of the cable-stayed bridge. Therefore, during the use of the cable-stayed bridge, it is inevitable to use dampers to control the vibration of the cable.

[0003] There are many existing cable-stayed damping devices, mainly including built-in rubber dampers and external dampers. The external damper is usually fixedly installed at the connection between the cable and the bridge. Although the existing external damper has good damping effect, it is fixed on the surface of the bridge, occupies a large space, is not beautiful, and has high maintenance and replacement cost. Most importantly, the position of the existing damper relative to the cable is fixed, thereby limiting the vibration frequency that the damper can cope with. SUMMARY

[0004] The purpose of the present application is to provide a movable cable-stayed damping damper and a cable-stayed damping system, which can automatically move to a suitable position along the cable, thereby better damping.

[0005] The embodiments of the present application are implemented by the following technical solutions:

[0006] A movable cable-stayed damping damper, comprising a damper body, a control circuit board and a plurality of rollers; the damper body is tubular; a plurality of the rollers are arranged inside the damper body; a plurality of the rollers are matched with the cable to enable a plurality of the rollers to roll along the cable; the rollers are electrically connected to the control circuit board to enable the control circuit board to control the rotation of the rollers.

[0007] Further, a locking assembly is further arranged inside the damper body; the locking assembly comprises a brake plate and a driving mechanism; the brake plate is slidably arranged on the inner wall of the damper body to enable the brake plate to move away from or close to the cable; the driving mechanism is matched with the brake plate to enable the driving mechanism to drive the brake plate to move relative to the cable.

[0008] Further, the damper body comprises a counterweight and a support; the counterweight is tubular; the support is arranged inside the counterweight and connected to the counterweight; the brake plate and the plurality of rollers are mounted on the support.

[0009] Further, the counterweight comprises two semicircular annular counterweight pieces, so that the two counterweight pieces can be spliced into a tubular counterweight; the support is provided with two supports, and the two supports are spliced into a circular ring.

[0010] Further, a plurality of buffer springs are uniformly arranged between the counterweight and the support.

[0011] Further, the brake plate is hinged to the support; the driving mechanism comprises an electromagnet and a return spring arranged between the support and the brake plate; the return spring connects the brake plate and the support, so that the return spring pushes the brake plate tightly against the cable; the electromagnet attracts the brake plate when energized, so that the brake plate is separated from the cable; the brake plate is provided with two brake plates arranged on opposite sides of the cable.

[0012] Further, a battery pack is arranged inside the counterweight; a solar cell panel is arranged on the outer wall of the counterweight; the solar cell panel and the control circuit board are connected to the battery pack.

[0013] A cable vibration damping system comprises a master controller and the movable cable vibration damping damper of any one of claims 1-7; the control circuit board is further provided with a communication module in cooperation with the master controller.

[0014] Further, a wind speed detection device is further included; the wind speed detection device is connected to the master controller.

[0015] The technical scheme of the embodiment of the application has at least the following advantages and beneficial effects:

[0016] When the movable cable vibration damping damper of the application is used, the control circuit board controls the rotation of the rollers, and then the entire damper moves along the cable. In practice, the overall structure of the cable determines its natural vibration frequency. If the frequency of the external time-varying load is the same as the natural vibration frequency of the cable, resonance will occur. At this time, if the damper moves along the cable, the overall structure of the cable will change, and then the natural vibration frequency will change. This effectively avoids resonance. Moving the damper to the appropriate position of the cable can more effectively reduce vibration.

[0017] Meanwhile, the most intense vibration part of the cable is generally in the middle of the cable when the cable encounters strong wind and the like. At this time, the damper can be moved to the middle of the cable to better reduce vibration. In addition, the cable of the bridge is generally long, and the length is from tens of meters to two hundred meters. This makes the interference of the wind force on each part of the cable different. We can move the damper to the most intense vibration part to reduce vibration.

[0018] Through the movable cable vibration damper, the vibration reduction state of the cable can be changed as needed, and the vibration reduction effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0020] Figure 1 The structure diagram of the movable cable vibration damper provided by the present application is shown.

[0021] Figure 2 The cross-sectional view of the movable cable vibration damper is shown.

[0022] Figure 3 The cooperation diagram of the brake plate and the cable is shown.

[0023] Figure 4 The diagram of the roller is shown.

[0024] Figure 5 The diagram of the cable vibration reduction system is shown.

[0025] Figure legend: 1-control circuit board, 2-roller, 3-cable, 4-brake plate, 5-driving mechanism, 6-counterweight piece, 7-bracket, 8-buffer spring, 9-electromagnet, 10-return spring, 11-battery pack, 12-solar panel, 13-master controller, 14-wind speed detection device, 15-rubber pad. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] The following detailed description of embodiments of the application in the drawings provided merely by way of exemplification is not intended to limit the scope of the application as claimed. Based upon a reading and understanding of the application disclosure by persons skilled in the art, all modifications equating to other embodiments of the application are possible and within the scope of the application.

[0028] It should be noted that like reference numerals and letters refer to like items in the several views of the drawings, and that the description can not further describe and explain the items once they have been defined in one of the drawings.

[0029] In the description of the application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the application is usually placed, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0030] In the description of the application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "linked" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, or can be connected internally between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0031] Embodiments:

[0032] As Figures 1-5As shown, the present application provides a movable cable vibration damping device, which comprises a damping device body, a control circuit board 1 and a plurality of rollers 2. The damping device body is tubular, which can be sleeved outside the cable 3. The plurality of rollers 2 are arranged inside the damping device body. The rollers 2 comprise a driving roller 2 and a driven roller 2. The driving roller 2 is internally provided with a motor, which can rotate after being powered on. The structure and principle of the driving roller 2 are the same as the driving wheel of a common electric motorcycle. That is to say, the driving roller 2 is internally provided with a motor, which can drive the roller 2 to rotate. The motor of the driving roller 2 is connected to the control circuit board 1, and the rotation of the driving motor is controlled through the control circuit board 1. The driven roller 2 is a conventional roller 2, which is internally provided with a motor and can only rotate under the driving of the driving roller 2. The plurality of rollers 2 are matched with the cable 3 to enable the plurality of rollers 2 to roll along the cable 3. Specifically, the plurality of rollers 2 are annularly distributed, so that the wheel surfaces of the plurality of rollers 2 are tightly attached to the surface of the cable 3. When the driving roller 2 rotates, the driving roller 2 can roll along the cable 3. The plurality of driven rollers 2 rotate under the driving of the driving roller 2. Thus, the entire damping device moves along the cable 3. In order to better ensure the stability of the damping device, the plurality of rollers 2 are provided in multiple rows. Specifically, a circle of rollers 2 is arranged at both ends of the damping device, and the cable 3 passes through the middle.

[0033] In practice, only one driving roller 2 can be provided. Only the damping device can move along the cable 3. In order to ensure that the damping device can effectively move along the cable 3, the surfaces of the driving roller 2 and the driven roller 2 are provided with rubber pads 15, so that the anti-skid performance is better. At the same time, the contact between the rubber pads 15 and the cable 3 will not cause damage to the cable 3.

[0034] In use, the control circuit board 1 controls the rotation of the rollers 2, so that the entire damping device moves along the cable 3. In practice, the overall structure of the cable 3 determines its natural vibration frequency. If the frequency of the external time-varying load is the same as the natural vibration frequency of the cable 3, resonance will occur. At this time, the movement of the damping device along the cable 3 changes the effective vibration length of the cable 3, and thus changes its natural vibration frequency. This effectively avoids resonance. Moving the damping device to the appropriate position of the cable 3 can more effectively dampen vibration.

[0035] Meanwhile, the existing damper is generally fixed on the bridge position. When the cable 3 encounters strong wind, the position with large amplitude is generally in the middle of the cable 3. Therefore, the related damper cannot accurately control the amplitude of the cable 3, and the damper of the present application can make the rolling of the driving wheel controlled by the main controller 13, so as to climb to any height along the cable 3 and directly act on the position with the largest amplitude, which greatly improves the damping effect of the damper. In addition, the cable 3 of the bridge is generally long, and the length is different from tens of meters to two hundred meters. This makes the interference of the wind force on each part of the cable 3 obviously different. We can move the damper to the position with the largest wind force, that is, the position with the strongest vibration for damping.

[0036] Through the movable cable damping damper, the damping state of the cable 3 can be changed as needed, and the damping effect is better.

[0037] In the embodiment, the damper body is further provided with a locking assembly. The locking assembly comprises a brake plate 4 and a driving mechanism 5. The surface of the brake plate 4 is rough, and a brake pad can also be provided. The brake plate 4 is close to the cable 3, so that a large friction force is generated between the brake plate 4 and the cable 3, and the entire damper is locked at a position of the cable 3. The brake plate 4 is slidably arranged on the inner wall of the damper body, so that the brake plate 4 can be away from or close to the cable 3. The driving mechanism 5 is arranged in cooperation with the brake plate 4, so that the driving mechanism 5 can drive the brake plate 4 to move relative to the cable 3. The brake plate 4 and the damper body can be cooperated in many ways. A sliding groove can be arranged on the damper body, so that the brake plate 4 can slide relative to the sliding groove, and the brake plate 4 can be away from or close to the cable 3. The driving device can be driven by an electric motor or a gas cylinder.

[0038] The brake plate 4 can make the entire damper stably fixed at a position of the cable 3. Avoid falling.

[0039] In the embodiment, the damper body comprises a counterweight and a support 7. The counterweight is tubular. The support 7 is arranged in the counterweight and connected to the counterweight. The brake plate 4 and the plurality of rollers 2 are installed on the support 7. The counterweight comprises two semicircular annular counterweight plates 6, so that the two counterweight plates 6 can be spliced into a tubular counterweight. The two counterweight plates 6 can be fixed by screws. The two counterweight plates 6 can also be hingedly connected, so that they can be opened and closed. The support 7 is provided with two supports 7, and the two supports 7 are spliced into a circular ring. The two supports 7 are connected to one of the counterweight plates 6.

[0040] In actual use, the two counterweight pieces 6 are spliced together and connected by screws, and the entire damper is installed on the cable 3. The damper is divided into two independent parts, which are connected to the surface of the cable 3 by bolts, convenient to install, and can be disassembled at any time for maintenance and replacement. The two parts are exactly the same, greatly reducing the difficulty of component processing and on-site assembly. The existing external damper is usually fixed to the bridge deck, which is not convenient to disassemble and replace, and the vibration suppression effect is limited. In addition, the damper of the present application also utilizes the phase difference between the counterweight piece 6 and the cable 3 to provide damping, so that the damping effect is excellent.

[0041] In this embodiment, a plurality of buffer springs 8 are uniformly arranged between the counterweight block and the support 7. When the cable 3 shakes, the cable 3 pushes the roller 2, and then pushes the support 7 to move towards the counterweight block. Because the counterweight block is heavy, the inertia is large. When the support 7 shakes suddenly, it will push the buffer spring 8 to move towards the counterweight block, and then squeeze the buffer spring 8, thereby generating a certain buffer.

[0042] In this embodiment, the brake plate 4 is hinged to the support 7. As shown in Figure 3 The driving mechanism 5 includes an electromagnet 9 and a return spring 10 arranged between the support 7 and the brake plate 4. The return spring 10 connects the brake plate 4 and the support 7, so that the return spring 10 pushes the brake plate 4 tightly against the cable 3. The electromagnet 9 attracts the brake plate 4 when energized, so that the brake plate 4 is separated from the cable 3. During the moving stage of the damper, the brake plate 4 is attracted by the electromagnet 9, so that the brake plate 4 is separated from the cable. The damper can smoothly move along the cable 3. After reaching the predetermined position, the electromagnet 9 is de-energized, the electromagnet 9 loses the magnetic force, and under the action of the return spring 10, the brake plate 4 is tightly attached to the surface of the cable 3, thereby achieving the purpose of position locking of the damper.

[0043] The brake plate 4 is provided with two brake plates 4 arranged on opposite sides of the cable 3. This makes the two sides of the cable 3 simultaneously subjected to the thrust of the brake plate 4, so that the overall stress is more balanced. In addition, in order to ensure that the magnetic force of the electromagnet 9 can effectively drive the brake plate 4 to act, the distance between the brake plate 4 and the cable 3 when the brake plate 4 is opened is set to about 2mm. That is to say, the electromagnet 9 only needs to move the brake plate 4 by 2mm.

[0044] In this embodiment, the counterweight block is internally provided with a battery pack 11. The outer wall of the counterweight block is provided with a solar panel 12. The solar panel 12 and the control circuit board 1 are connected to the battery pack 11. This makes the damper capable of charging by solar energy, thereby ensuring the normal operation of the control system.

[0045] The application also provides a cable damping system, which comprises a main controller 13 and the movable cable damping damper described above. The control circuit board 1 is also provided with a communication module in cooperation with the main controller 13. The main controller 13 sends information to the communication module as needed, so that the control circuit board 1 controls the movement of the damper according to the instruction of the main controller 13.

[0046] In this embodiment, a wind power and speed detection device 14 is also included. The wind power and speed detection device 14 is connected to the main controller 13. The wind power and speed detection device 14 can detect the wind power and speed in the environment. The main controller 13 adjusts the position of the damper according to the wind power and speed in the environment.

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

Claims

1. A movable stay cable vibration damper, characterized by: The damper body, the control circuit board (1) and a plurality of rollers (2); the damper body is tubular; a plurality of the rollers (2) are arranged in the damper body; a plurality of the rollers (2) are matched with the cable (3) to enable a plurality of the rollers (2) to roll along the cable (3); the roller (2) is electrically connected to the control circuit board (1) to enable the control circuit board (1) to control the rotation of the roller (2); The damper body includes a counterweight and a support (7); the counterweight is tubular; the support (7) is arranged in the counterweight and connected to the counterweight by a plurality of buffer springs (8); The damper body is further provided with a locking assembly; the locking assembly includes a brake plate (4) and a driving mechanism (5); the brake plate (4) is slidably arranged on the inner wall of the support (7) to enable the brake plate (4) to be away from or close to the cable (3); the driving mechanism (5) includes an electromagnet (9) and a return spring (10) arranged between the support (7) and the brake plate (4); the return spring (10) connects the brake plate (4) and the support (7) to enable the return spring (10) to push the brake plate (4) close to the cable (3); the electromagnet (9) attracts the brake plate (4) when energized to separate the brake plate (4) from the cable (3).

2. The moveable stay cable damper of claim 1, wherein: The counterweight includes two semicircular annular counterweight pieces (6) to enable two counterweight pieces (6) to be spliced into a tubular counterweight; the support (7) is provided with two, and two supports (7) are spliced into a circular ring.

3. The moveable stay cable damper of claim 2, wherein: The brake plate (4) is provided with two and two brake plates (4) are arranged on opposite sides of the cable (3).

4. The moveable stay cable damper of claim 3, wherein: The counterweight is provided with a battery pack (11) inside; the outer wall of the counterweight is provided with a solar panel (12); the solar panel (12) and the control circuit board (1) are connected to the battery pack (11).

5. A stay cable vibration damping system characterized by: The main control unit (13) and the movable cable damping damper of any one of claims 1-4; the control circuit board (1) is further provided with a communication module matched with the main control unit (13).

6. The stay cable vibration damping system of claim 5, wherein: Further comprising a wind speed detection device (14); the wind speed detection device (14) is connected to the main control unit (13).

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