box girder bridge

Abstract

The present invention provides a box girder bridge, which relates to the technical field of bridge construction. As the wind speed gradually increases, the anemometer cup begins to rotate gradually. The rotation of the anemometer cup drives the screw to rotate around its own axis. The slider of the threaded part on the screw will move in the second direction, so that the second wedge block to be determined is pressed on the first wedge block, pushing the first wedge block to gradually move toward the side of the lock pin, pushing the lock pin to move toward the inside of the assembly hole, and the rear end of the lock pin is in contact with the spring. The movement of the lock pin needs to overcome the elastic force of the spring. Therefore, only when the wind speed reaches a certain intensity can the spring be compressed into place, the lock pin enters the assembly hole, the lock pin is separated from the pin hole, and after the baffle loses the positioning of the lock pin, it is driven by the clockwork spring to rotate from a horizontal state to a vertical state. At this time, the central slot of the bridge body is in a fully air-permeable state, and the anti-vibration performance is good.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, in particular to a box girder bridge. Background Art

[0002] Vortex-induced vibration (VIV) is a common wind-induced vibration phenomenon in bridges at low wind speeds. This phenomenon occurs when vortices formed by airflow around the bridge cross-section have the same frequency as the structure itself, causing resonance in the bridge. Vortex-induced vibration is self-limiting and generally does not cause structural safety issues for the bridge itself. However, it can lead to construction safety issues during the construction phase and affect driving safety and comfort during the completion phase. Therefore, the frequency of occurrence or amplitude should be minimized in the design. Flutter is a divergent vibration characterized by coupled single-degree-of-freedom torsional or bending-torsion modes. It typically occurs at high wind speeds and is a form of dynamic instability. Its occurrence should be strictly prevented in bridge design.

[0003] How to achieve bridge stability in both low and high wind speed scenarios is an urgent problem that needs to be solved. Summary of the Invention

[0004] The object of the present invention is to provide a box girder bridge to alleviate the technical problem that the existing box girder bridge cannot respond quickly to the flutter problem in a timely manner.

[0005] In a first aspect, the present invention provides a box girder bridge comprising: a bridge body, a baffle, a spring, a lock pin, a spring, a push rod, a first wedge block, a second wedge block, a slider, a screw rod, and an anemometer cup;

[0006] The bridge body has slots running through the upper and lower surfaces thereof;

[0007] The baffle is rotatably connected in the slot; the baffle has a horizontal state and a vertical state. In the horizontal state, the baffle closes the slot, and in the vertical state, the slot is connected up and down;

[0008] The spring is connected between the baffle and the bridge body, and has an elastic force that causes the baffle to rotate from a horizontal state to a vertical state;

[0009] The end surface of the baffle has an assembly hole extending in a first direction, the lock pin is located in the assembly hole, and one end of the spring is connected to the bottom surface of the assembly hole, and the other end is connected to the lock pin; a pin hole is provided on the side wall of the slot, and the lock pin extends into the pin hole to maintain the baffle in a horizontal state;

[0010] The push rod is slidably connected to the bridge body, and the push rod is coaxially arranged with the pin hole;

[0011] The first wedge block is connected to the tail end of the push rod, and the second wedge block is connected to the slider; the slider is slidably connected to the bridge body along the second direction; the screw rod extends along the second direction, the bottom end of the screw rod is rotatably connected to the bridge body, and the slider is threadedly connected to the screw rod, and the anemometer wind cup is connected to the top end of the screw rod, and the screw rod is driven to rotate by the anemometer wind cup to make the slider slide along the second direction; the inclined surface of the first wedge block is parallel to the inclined surface of the second wedge block, so that the second wedge block moving in the second direction can drive the first wedge block to move in the first direction.

[0012] Furthermore, there are two assembly holes on the end surface of the baffle, and the two assembly holes are respectively located on opposite sides of the rotating shaft of the baffle, and each assembly hole has the spring and the lock pin;

[0013] The number of the pin holes and push rods is the same as the number of the locking pins, and each push rod is connected to the first wedge block.

[0014] Furthermore, a plurality of baffles are rotatably connected in the same slot, and the plurality of baffles close the slot together when in a horizontal state;

[0015] The push rods corresponding to the locking pins on each baffle are all connected to the same first wedge block.

[0016] Furthermore, a sliding groove extending along the second direction is provided on the bridge body, and the sliding block is located in the sliding groove. The sliding groove is used to limit the sliding block to prevent it from rotating together with the screw.

[0017] Furthermore, the contact surfaces between the locking pin and the push rod are both spherical.

[0018] Furthermore, a stop rod is provided on the side wall of the slot, and the stop rod is located on the rotation path of the baffle, and is used to prevent the baffle from continuing to rotate when the baffle rotates to a vertical state.

[0019] Furthermore, the stop rod is elastic so that when the baffle passes through the stop rod, the baffle can go over the stop rod;

[0020] There are multiple stop rods, and the multiple stop rods are arranged at intervals on the rotation path of the baffle.

[0021] Furthermore, the elasticity of the stop rod gradually decreases from the position where the baffle is in a horizontal state to the position where the baffle is in a vertical state.

[0022] Furthermore, a photoelectric sensor is provided on the side wall of the slot, and when the baffle is in a horizontal state, the baffle blocks the photoelectric sensor, and when the baffle is in a vertical state, the photoelectric sensor is exposed;

[0023] The box girder bridge further includes an alarm electrically connected to the photoelectric sensor.

[0024] Furthermore, a handle is provided on the screw rod for manually rotating the screw rod.

[0025] The present invention has at least the following advantages or beneficial effects:

[0026] In normal circumstances, when there is no wind or the wind speed is relatively low, the baffle is in a horizontal state and the slot is in an airtight or nearly airtight closed state, thereby blocking the generation of vortices at the slot and preventing vortex vibration. As the wind speed gradually increases, the anemometer cup begins to rotate gradually, and the rotation of the anemometer cup drives the screw to rotate around its own axis. The slider of the threaded part on the screw will move in the second direction, so that the second wedge block is pressed on the first wedge block, pushing the first wedge block gradually toward the side of the lock pin, pushing the lock pin to move into the assembly hole. The rear end of the lock pin abuts against the spring, and the movement of the lock pin needs to overcome the elastic force of the spring. Therefore, only when the wind speed reaches a certain intensity can the spring be compressed into place, the lock pin enters the assembly hole, and the lock pin is separated from the pin hole. After the baffle loses the positioning of the lock pin, it is driven by the spring to rotate from the horizontal state to the vertical state. At this time, the central slot of the bridge body is in a fully airtight state, and the anti-vibration performance is good. Because the various components in the present application solution are connected and driven by purely mechanical means, they will not be affected by external power outages and can protect the box girder bridge at all times. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of a box girder bridge provided by an embodiment of the present invention with a baffle in a horizontal state;

[0029] Figure 2 A top view of a baffle of a box girder bridge provided by an embodiment of the present invention in a horizontal state;

[0030] Figure 3 for Figure 2 Partial cross-sectional view in the AA direction;

[0031] Figure 4 A schematic diagram of the internal structure of a box girder bridge provided by an embodiment of the present invention;

[0032] Figure 5 for Figure 4 A partial enlarged view of position B in the middle;

[0033] Figure 6 A schematic diagram of the baffle rotation process of a box girder bridge provided in an embodiment of the present invention.

[0034] Icons: 100-bridge body; 110-slot; 111-stop rod; 120-slide groove; 200-baffle; 300-spring; 400-lock pin; 500-spring; 600-push rod; 700-first wedge block; 800-second wedge block; 900-slider; 1000-screw; 1100-anemometer cup. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0036] 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 invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0038] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0040] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0041] like Figure 1-Figure 5 As shown, the box girder bridge provided by the present invention includes: a bridge body 100, a baffle 200, a clockwork spring 300, a locking pin 400, a spring 500, a push rod 600, a first wedge block 700, a second wedge block 800, a slider 900, a screw rod 1000 and an anemometer cup 1100.

[0042] The bridge body 100 has slots 110 running through the upper and lower surfaces thereof. There may be multiple slots 110 , and the structural arrangement in each slot 110 may be the same. The multiple slots 110 are spaced apart along the bridge direction.

[0043] The baffle 200 is rotatably connected to the slot 110. The baffle 200 may have rotating shafts at both ends of the transverse bridge direction. The rotating shafts at both ends are respectively connected to the shaft holes on the opposite side walls of the slot 110, thereby realizing the rotation of the baffle 200. The baffle 200 has a horizontal state and a vertical state. In the horizontal state, the baffle 200 blocks the slot 110. In the vertical state, the slot 110 is connected vertically.

[0044] The spring spring 300 is connected between the baffle 200 and the bridge body 100. The sidewall of the slot 110 has a circular mounting hole, within which the spring spring 300 is located. One end of the spring spring 300 is connected to the wall of the mounting hole, and the other end is connected to the rotating shaft of the baffle 200. The spring spring 300 has the elastic force to rotate the baffle 200 from a horizontal position to a vertical position. In other words, when the baffle 200 loses the force maintaining its horizontal position, the spring spring 300 will drive the baffle 200 to rotate to a vertical position.

[0045] The end surface of the baffle 200 has an assembly hole extending in a first direction. The locking pin 400 is located within the assembly hole and can slide relative to the assembly hole along the depth direction of the hole. One end of the spring 500 is connected to the bottom surface of the assembly hole, and the other end is connected to the locking pin 400. In a natural state, the locking pin 400 can be partially exposed outside the assembly hole and partially inside the assembly hole under the action of the spring 500. The side wall of the slot 110 is provided with a pin hole, and the locking pin 400 extends into the pin hole. With the lock pin 400 and the pin hole in cooperation, the clockwork spring 300 cannot drive the baffle 200 to rotate, thereby maintaining the baffle 200 in a horizontal state.

[0046] The push rod 600 extends along the first direction, is slidably connected to the bridge body 100, and is coaxially arranged with the pin hole. The push rod 600 can push the locking pin 400 into the assembly hole, thereby separating the locking pin 400 from the pin hole.

[0047] Both the first wedge block 700 and the second wedge block 800 have inclined surfaces, and the two inclined surfaces are parallel to each other. The two inclined surfaces contact each other and can change the direction of the applied force. In this embodiment, the second wedge block 800 sliding in the second direction (vertical) can push the first wedge block 700 in the first direction (horizontal) through the interaction of the two inclined surfaces. The first wedge block 700 is connected to the tail end of the push rod 600, which extends in the first direction. The second wedge block 800 is connected to the slider 900, which slides in the second direction. The screw rod 1000 extends in the second direction. The bottom end of the screw rod 1000 is rotatably connected to the bridge body 100, and the slider 900 is threadedly connected to the screw rod 1000. The anemometer cup 1100 is connected to the top end of the screw rod 1000.

[0048] When there is no wind or the wind speed is relatively low, the baffle 200 is in a horizontal state and the slot 110 is in an airtight or nearly airtight closed state, thereby blocking the generation of vortices at the slot 110 and preventing vortex vibration. As the wind speed gradually increases, the anemometer cup 1100 begins to rotate gradually. The rotation of the anemometer cup 1100 drives the screw 1000 to rotate around its own axis. The slider 900 of the threaded part on the screw 1000 will move in the second direction, so that the second wedge block 800 is pressed on the first wedge block 700, pushing the first wedge block 700 to gradually move toward the side of the lock pin 400, pushing the lock pin 400 to move toward the inside of the assembly hole, and the rear end of the lock pin 400 and the spring 50 0 abuts against each other, and the movement of the lock pin 400 needs to overcome the elastic force of the spring 500. Therefore, only when the wind speed reaches a certain intensity can the spring 500 be compressed into place, the lock pin 400 enters the assembly hole, and the lock pin 400 separates from the pin hole. After the baffle 200 loses the positioning of the lock pin 400, driven by the spring 300, the baffle 200 rotates from the horizontal state to the vertical state. At this time, the central slot 110 of the bridge body 100 is in a fully airtight state, and the anti-vibration performance is good. Because the various components in the present application solution are connected and driven by purely mechanical means, they are not affected by external power outages and can provide constant protection for the box girder bridge.

[0049] To improve the stability of the baffle 200 and prevent accidental flipping, the baffle 200 has two assembly holes on its end surface, located on opposite sides of the baffle's 200 axis. Each assembly hole houses a spring 500 and a lock pin 400. The number of pin holes and push rods 600 is the same as the number of lock pins 400, and each push rod 600 is connected to the first wedge block 700. The movement of the first wedge block 700 drives each push rod 600 toward the lock pin 400, thereby simultaneously unlocking both lock pins 400 on the same baffle 200.

[0050] Similarly, in order to reduce costs and reduce the adaptability of the screw rod 1000 and the anemometer cup 1100, in this solution, multiple baffles 200 are rotatably connected in the same slot 110, and the multiple baffles 200 close the slot 110 together when they are in a horizontal state; the push rod 600 corresponding to the locking pin 400 on each baffle 200 is connected to the same first wedge block 700, and multiple baffles 200 can be started at the same time using one anemometer cup 1100.

[0051] The bridge body 100 is provided with a slide groove 120 extending in the second direction. The cross-section of the slide groove 120 may be rectangular, and the cross-section of the slider 900 is also rectangular. The slider 900 is located in the slide groove 120. The slide groove 120 prevents the slider 900 from rotating, but the slider 900 can move along the slide groove 120 in the second direction.

[0052] The contact surfaces of the locking pin 400 and the push rod 600 are both spherical. When the push rod 600 presses against the locking pin 400 and moves toward the assembly hole, the baffle 200 can rotate when the locking pin 400 just leaves the pin hole. The spherical setting can prevent the push rod 600 from entering the assembly hole and block the baffle 200 from rotating. This is because even if a small part of the ball head of the push rod 600 enters the assembly hole, the baffle 200 will contact the ball head of the push rod 600 and, under the guidance of the curved surface of the ball head, push the push rod 600 to move in the opposite direction, thereby achieving smooth rotation.

[0053] like Figure 6 As shown, it should be specially explained that a stop rod 111 is provided on the side wall of the slot 110 , and the stop rod 111 is located on the rotation path of the baffle 200 , and is used to prevent the baffle 200 from continuing to rotate when it rotates to a vertical state.

[0054] When the locking pin 400 is separated from the pin hole, the baffle 200 rotates rapidly under the drive of the clockwork spring 300. If the stop plate 200 is not provided, the baffle 200 will swing back and forth multiple times under the drive of the clockwork spring 300. However, the stop plate 200 can immediately stop the baffle 200 in a vertical state and release the wind force.

[0055] Furthermore, the stop rod 111 is elastic, allowing the baffle 200 to pass over it. Multiple stop rods 111 are provided, spaced apart along the rotational path of the baffle 200. To prevent damage to the baffle 200 from colliding with the stop plate 200, multiple stop rods 111 can be provided. When the baffle 200 returns to its free initial state, the clockwork spring 300 stores a significant amount of elastic potential energy. Each time the baffle 200 collides with the stop rod 111, the baffle 200's rotational speed is reduced until it reaches a vertical position. Furthermore, the elasticity of the stop rod 111 gradually decreases from the horizontal position of the baffle to the vertical position. As a result, the stopping process of the baffle 200 is a gradual process. The first stop rod 111 has the greatest elasticity and is most likely to deform. Its blocking effect on the baffle 200 is the worst, but the damage to the baffle 200 is the least. As the baffle 200 rotates, the resistance encountered by the baffle 200 becomes greater and greater, and finally stops at a position between the last two stop rods 111.

[0056] A photoelectric sensor is provided on the side wall of the slot 110. When the baffle 200 is in a horizontal state, the baffle 200 blocks the photoelectric sensor and the photoelectric sensor does not trigger an alarm. When the baffle 200 is in a vertical state, the photoelectric sensor is exposed and the alarm is triggered, prompting the user that the slot 110 can be opened.

[0057] The screw rod 1000 is provided with a handle for manually rotating the screw rod 1000 to facilitate manual resetting of the baffle 200 .

[0058] Finally, it should be noted that the above 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 with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A box girder bridge, characterized in that: include: A bridge body (100), a baffle (200), a spring (300), a locking pin (400), a spring (500), a push rod (600), a first wedge block (700), a second wedge block (800), a slider (900), a screw rod (1000) and an anemometer cup (1100); The bridge body (100) has slots (110) extending through the upper and lower surfaces thereof; The baffle (200) is rotatably connected in the slot (110); the baffle (200) has a horizontal state and a vertical state. In the horizontal state, the baffle (200) closes the slot (110); in the vertical state, the slot (110) is connected vertically. The spring spring (300) is connected between the baffle (200) and the bridge body (100), and the spring spring (300) has an elastic force that causes the baffle (200) to rotate from a horizontal state to a vertical state; The end surface of the baffle (200) has an assembly hole extending in a first direction, the lock pin (400) is located in the assembly hole, and one end of the spring (500) is connected to the bottom surface of the assembly hole, and the other end is connected to the lock pin (400); a pin hole is provided on the side wall of the slot (110), and the lock pin (400) extends into the pin hole to maintain the baffle (200) in a horizontal state; The push rod (600) is slidably connected to the bridge body (100), and the push rod (600) is coaxially arranged with the pin hole; The first wedge block (700) is connected to the tail end of the push rod (600), and the second wedge block (800) is connected to the slider (900); the slider (900) is slidably connected to the bridge body (100) along the second direction; the screw rod (1000) extends along the second direction, the bottom end of the screw rod (1000) is rotatably connected to the bridge body (100), and the slider (900) is threadedly connected to the screw rod (1000). The anemometer cup (1100) is connected to the top end of the screw rod (1000), and the screw rod (1000) is driven to rotate by the anemometer cup (1100), so that the slider (900) slides along the second direction; the inclined surface of the first wedge block (700) is parallel to the inclined surface of the second wedge block (800), so that the second wedge block (800) moving in the second direction can drive the first wedge block (700) to move in the first direction.

2. The box girder bridge according to claim 1, characterized in that: There are two assembly holes on the end surface of the baffle (200), and the two assembly holes are respectively located on opposite sides of the rotating shaft of the baffle (200), and each assembly hole contains the spring (500) and the lock pin (400); The number of the pin holes and push rods (600) is the same as the number of the locking pins (400), and each push rod (600) is connected to the first wedge block (700).

3. The box girder bridge according to claim 2, characterized in that: A plurality of baffles (200) are rotatably connected in the same slot (110), and the plurality of baffles (200) together seal the slot (110) when in a horizontal state; The push rod (600) corresponding to the locking pin (400) on each baffle (200) is connected to the same first wedge block (700).

4. The box girder bridge according to claim 3, characterized in that: The bridge body (100) is provided with a slide groove (120) extending along the second direction, and the slider (900) is located in the slide groove (120). The slide groove (120) is used to limit the slider (900) to prevent it from rotating with the lead screw.

5. The box girder bridge according to claim 1, characterized in that: The contact surfaces between the locking pin (400) and the push rod (600) are both spherical.

6. The box girder bridge according to claim 1, characterized in that: A stop rod (111) is provided on the side wall of the slot (110). The stop rod (111) is located on the rotation path of the baffle (200) and is used to prevent the baffle (200) from continuing to rotate when it rotates to a vertical state.

7. The box girder bridge according to claim 6, characterized in that: The stop rod (111) is elastic, so that when the baffle (200) passes through the stop rod (111), the baffle can go over the stop rod (111); There are multiple stop rods (111), and the multiple stop rods (111) are arranged at intervals on the rotation path of the baffle (200).

8. The box girder bridge according to claim 7, characterized in that: From the position where the baffle is in a horizontal state to the position where it is in a vertical state, the elasticity of the stop rod (111) gradually decreases.

9. The box girder bridge according to claim 1, characterized in that: A photoelectric sensor is provided on the side wall of the slot (110); when the baffle (200) is in a horizontal state, the baffle (200) blocks the photoelectric sensor; when the baffle (200) is in a vertical state, the photoelectric sensor is exposed; The box girder bridge further includes an alarm electrically connected to the photoelectric sensor.

10. The box girder bridge according to claim 1, characterized in that: The screw rod (1000) is provided with a handle for manually rotating the screw rod (1000).

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