Lever trigger type guardrail turnover driving device and bridge guardrail

Abstract

The application provides a lever trigger type guardrail turnover driving device and a bridge guardrail, belongs to the field of building construction, and is used for solving the problems of easy damage of the existing electric driving device of the bridge guardrail turnover when flood comes and the problem of waste of human resources in manual turnover of the guardrail, and comprises a trigger mechanism and a driving mechanism; the trigger mechanism comprises a float, a cross rod, a supporting seat and a trigger guide rod, the lever structure is formed by the cross rod and the supporting seat, the limiting assembly is hinged on the trigger guide rod, the trigger guide rod at one end slides up and down along the guide hole under the driving of the float at the other end, the limiting assembly is folded and unfolded at the same time, the trigger and reset of the driving mechanism are completed, the driving mechanism provides driving force for the turnover of the bridge guardrail, the purpose of avoiding damage of the bridge caused by the bridge guardrail blocking the flood and the floating objects, and the problem of damage of the existing electric driving device due to soaking in water when the flood comes is solved.

Description

Technical Field

[0001] This invention belongs to the field of building construction, and in particular relates to a lever-triggered guardrail flipping drive device and a bridge guardrail. Background Technology

[0002] When bridges are subjected to floods or tsunamis, the damage caused by floods, tsunamis, and their accompanying floating debris is immense. The force exerted on the railings by floods and tsunamis accounts for a very large proportion of the force exerted on the bridge superstructure. The presence or absence of railings has a significant impact on whether and to what extent the superstructure is damaged. Bridge railings are important safety ancillary facilities in bridge engineering. They are strip-shaped energy-absorbing structures installed on the outer side or central median of the bridge. In the event of a vehicle collision, they absorb collision energy through their own deformation or the vehicle's upward movement, thereby reducing the severity of injury to occupants. However, during floods, this guardrail structure can cause floodwaters carrying floating debris to overflow the bridge surface. The debris is blocked by the guardrail and accumulates in large quantities, leading to a rise in water levels. This significantly increases the horizontal load, vertical lift, and overturning moment on the bridge superstructure. To prevent the guardrail from blocking floating debris, a flip-up bridge guardrail has been designed. This design allows the guardrail to be flipped during floods to prevent damage to the bridge caused by the guardrail blocking floodwaters and floating debris. However, when the guardrail's flipping drive is electric, the electric device is at increased risk of damage due to water immersion during floods. When the guardrail needs to be flipped manually, manually flipping the guardrail before a flood increases the danger to construction workers. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a lever-triggered guardrail flipping drive device and a bridge guardrail, which solves the problems of the electric drive device for flipping existing bridge guardrails being easily damaged during floods, the waste of human resources in manually flipping guardrails, and the increased danger to construction workers before floods. By relying on the buoyancy provided by the flood to provide an upward driving force for the guardrail flipping through the lever-triggered drive mechanism, the invention aims to avoid bridge damage caused by the bridge guardrail obstructing the passage of floodwaters and floating objects.

[0004] To achieve the above and other related objectives, the present invention provides a lever-triggered guardrail flipping drive device, comprising a triggering mechanism and a drive mechanism;

[0005] The triggering mechanism is disposed in a groove at the bottom of the bridge beam and includes a float, a crossbar, a support base, and a triggering guide rod. The support base is fixedly connected to the bottom of the groove, and a crossbar sleeve is connected to the support base. The crossbar sleeve is slidably connected to the crossbar. One end of the crossbar is fixedly connected to the float, and the other end is hinged to the bottom end of the triggering guide rod. The triggering guide rod is arranged in a guide hole vertically opened in the bridge beam and slides up and down along the guide hole under the action of the float. A limit component is connected to the triggering guide rod. The limit component closes and unfolds under the action of the triggering guide rod to complete the triggering and resetting of the drive mechanism.

[0006] The driving mechanism is disposed within a vertically opened guide hole in the bridge beam and includes a support plate, a spring, a sliding sleeve, and a guide member. The support plate is disposed inside the guide hole, and the top end of the support plate is fixedly connected to the bottom end of the spring. The top end of the spring is connected to the guide member, and the spring is used to drive the guide member to move upward along the guide hole. The sliding sleeve is disposed inside the spring and is used to cooperate with the limiting component to complete the triggering, release, and reset of the spring.

[0007] Optionally, there are at least three support seats, which are evenly distributed around the center of the groove, and the center of the groove coincides with the center of the guide hole.

[0008] Optionally, the limiting component includes two limiting plates, which are arranged vertically along the radial direction of the trigger guide rod. A limiting protrusion is fixedly connected to the limiting plate, and a limiting groove is formed on the limiting plate. The limiting groove cooperates with the limiting protrusion on the other limiting plate.

[0009] Optionally, the bottom end of the guide member is provided with a trigger guide hole and a strip groove, the axis of the trigger guide hole coincides with the axis of the guide member, and the strip groove is provided along the radial direction of the guide member.

[0010] Optionally, a circular through hole is provided in the center of the support plate, and it is slidably connected to the trigger guide rod.

[0011] Optionally, the sliding sleeve includes an inner sleeve and an outer sleeve. The inner sleeve has a boss-shaped structure. The top end of the inner sleeve is fixedly connected to the bottom end of the guide member, and a strip-shaped through hole is provided on the top side wall. The bottom end of the outer sleeve is fixedly connected to the top of the support plate.

[0012] The present invention also provides a bridge railing, wherein the bridge railing adopts the above-mentioned lever-triggered railing flipping drive device, and the bridge railing further includes a railing body, a support member and a flipping member;

[0013] The main body of the guardrail is hinged to the top of the bridge beam;

[0014] One end of the support member is hinged to the main body of the guardrail, and the other end is hinged to the flipping member, for supporting the main body of the guardrail;

[0015] The flipping component is slidably disposed within the guide hole, with its top end hinged to one end of the support component and its bottom end hinged to the top end of the guide component.

[0016] Optionally, the guardrail body includes a base, posts, and crossbars; there are multiple bases evenly distributed along the length of the bridge beam, and each of the multiple bases is fixedly connected to the top of the bridge beam; there are multiple posts, each of which is hinged to the base; the posts are bent in the middle and protrude outwards; and multiple sets of crossbars are fixedly connected to the posts.

[0017] Optionally, the flipping component is a columnar structure, and the sum of the lengths of the flipping component and the support component minus the distance between the two hinge points on the guardrail body is equal to the distance between the base and the guide hole.

[0018] Optionally, the height at which the guide slides up and down is equal to the length of the flipping member.

[0019] As described above, the lever-triggered guardrail flipping drive device and bridge guardrail of the present invention have at least the following beneficial effects:

[0020] 1. This invention designs the flipper as a columnar structure and arranges it together with the guide member within the guide hole. The top of the flipper is hinged to one end of the support member, and the bottom end is hinged to the top of the guide member. In daily use, the flipper is entirely arranged within the guide hole, with the hinged top providing a support point for the support member. When a flood occurs, a float located in the bottom groove rises, causing the trigger guide rod located at the other end of the crossbar to move downwards. The limiting plate changes from a fully open state to a closed state, simultaneously releasing the spring. The spring drives the guide member to move upwards, causing the flipper to slide upwards until it slides out of the guide hole, thus flipping the flipper. During the ascent, the component moves one end of the support component upward while the main body of the guardrail tilts inward. When the flipping component slides completely out of the guide hole, the main body of the guardrail flips inward under the action of gravity. The length design of the flipping component and the support component can ensure that the main body of the guardrail flips inward to a horizontal position, avoiding the situation where the guardrail blocks floods and floating objects, resulting in a large amount of siltation and damage to the superstructure of the bridge. The flipping component can achieve the flipping of the main body of the guardrail under the drive of the drive device. It can also avoid high-risk operations for construction workers before the flood arrives and reduce the waste of human resources caused by the need to dismantle the guardrail.

[0021] 2. This invention utilizes a strip-shaped groove at the bottom of the guide member or a strip-shaped through hole on the top side wall of the inner sleeve of the boss-shaped structure to form a reset assembly for the drive mechanism, which is hinged to the top of the trigger guide rod. After the flood recedes, the float descends under the action of gravity, causing the trigger guide rod located at the other end of the crossbar to move upward. The guide member compresses the spring under the downward reset force of the worker. The limit plate, away from the hinge end, changes from a semi-closed state to a fully open state under the downward pressure at the bottom of the guide member and the upward force of the trigger guide member. The full unfolding of the limit plate completes the compression and reset of the spring. The fully unfolded limit plate can limit the spring. This invention, by utilizing the buoyancy of the flood and the trigger mechanism designed based on the lever principle, and by utilizing the weight of the float itself in conjunction with the reset assembly designed based on the lever principle, not only allows for the reuse of the device but also avoids the malfunctions and damage caused by water immersion in the electric drive device.

[0022] 3. This invention divides the main body of the bridge railing into multiple groups by setting two columns as a group and adding multiple groups of crossbars between the two columns. The modular design allows for the replacement of the damaged parts if a vehicle accident occurs during daily use, which is convenient for installation and maintenance. At the same time, the modular railing body is also convenient for reinstallation after floods. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the overall structure of the present invention in its everyday state;

[0024] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A;

[0025] Figure 3 This is a schematic diagram of the overturning component of the present invention floating and sliding out of the guide hole after a flood.

[0026] Figure 4 For the present invention after the flood Figure 1 Schematic diagram of the structure at point A;

[0027] Figure 5 This is a schematic diagram of the overall structure of the flipping component after the flipping state has changed according to the present invention;

[0028] Figure 6 This is a schematic diagram of the triggering mechanism of the present invention;

[0029] Figure 7 This is a schematic diagram of the hinge connection between the trigger guide rod and the limiting piece of the present invention;

[0030] Figure 8 This is an exploded view of the drive mechanism of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of the sliding sleeve of the present invention.

[0032] Component designation explanation

[0033] Guardrail body -1, base -101, post -102, crossbar -103, support component -2, support rod base -201, spring -202, outer tube -203, inner rod -204, flipping component -3, guide component -4, strip groove -401, float -5, crossbar -6, support seat -7, crossbar sleeve -701, trigger guide rod -8, limit plate -801, support plate -9, circular through hole -901, spring -10, sliding sleeve -11, inner sleeve -1101, outer sleeve -1102. Detailed Implementation

[0034] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0035] Please see Figures 1 to 9 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0036] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0037] Please see Figures 1 to 9 The present invention provides a lever-triggered guardrail flipping drive device, including a triggering mechanism and a drive mechanism;

[0038] The triggering mechanism is located in a groove at the bottom of the bridge beam and includes a float 5, a crossbar 6, a support base 7, and a triggering guide rod 8. The support base 7 is fixedly connected to the bottom of the groove, and a crossbar sleeve 701 is connected to the support base 7. The crossbar sleeve 701 is slidably connected to the crossbar 6. One end of the crossbar 6 is fixedly connected to the float 5, and the other end is hinged to the bottom end of the triggering guide rod 8. The triggering guide rod 8 is arranged in a guide hole vertically opened in the bridge beam and slides up and down along the guide hole under the action of the float 5. A limit component is connected to the triggering guide rod 8. The limit component closes and unfolds under the action of the triggering guide rod 8 to complete the triggering and resetting of the drive mechanism.

[0039] The driving mechanism is disposed within a vertically opened guide hole in the bridge beam and includes a support plate 9, a spring 10, a sliding sleeve 11, and a guide member 4. The support plate 9 is disposed inside the guide hole, and its top end is fixedly connected to the bottom end of the spring 10. The top end of the spring 10 is connected to the guide member 4, and the spring 10 drives the guide member 4 to move upward along the guide hole. The sliding sleeve 11 is disposed inside the spring 10 and is used to cooperate with the limiting component to complete the triggering, releasing, and resetting work of the spring 10. This application passes... The triggering mechanism is designed as a lever-type triggering mechanism. The triggering guide rod 8, located at one end of the crossbar 6, slides up and down along the guide hole under the action of the float 5 located at the other end of the crossbar 6. The limiting component closes and unfolds under the action of the sliding of the triggering guide rod 8, thus completing the triggering and resetting of the drive mechanism. The buoyancy force of the flood is used to trigger the drive mechanism, which provides driving force for the overturning of the bridge railing. This avoids damage to the bridge caused by the bridge railing blocking the flood and floating objects, and solves the problem of existing electric drive devices being damaged by water during floods.

[0040] In this embodiment, please refer to Figure 1 There are at least three support seats 7, which are evenly distributed around the center of the groove. The center of the groove coincides with the center of the guide hole. The groove at the bottom of the bridge beam can effectively reduce the horizontal force of water flow on the triggering mechanism. At least three support seats 7 (four in the figure, one of which is blocked) can reduce the force on the triggering guide rod 8 in the horizontal direction, ensure its vertical sliding, and reduce the bending damage of the triggering guide rod 8 caused by the horizontal force.

[0041] In this embodiment, please refer to Figure 2 , Figure 6 and Figure 7The top end of the trigger guide rod 8 is hinged to a limiting assembly, which includes two limiting pieces 801. The limiting pieces 801 are arranged vertically along the radial direction of the trigger guide rod 8. The hinge holes of the limiting pieces 801 are formed between the middle and end portions of the limiting pieces 801. In the fully open state of the limiting pieces 801 (see [reference]...), Figure 2 , Figure 6 and Figure 7 The end furthest from the hinge extends into a limiting groove within the guide hole, while the end closest to the hinge has a limiting groove that engages with a limiting protrusion fixed to another limiting piece 801. This limits the opening angle of the limiting piece 801, completing the compression and reset of the spring 10 inside the drive mechanism. The upward force of the spring 10 and the upward force of the trigger guide rod 8 are applied together to the top of the limiting groove in the guide hole. The limiting piece 801 can also be hinged below the top of the trigger guide rod 8 (see [link]). Figure 6 (The dotted line portion), the bottom end of the guide member 4 is provided with a trigger guide hole and a strip groove 401. The axis of the trigger guide hole coincides with the axis of the guide member 4. The top of the trigger guide rod 8 is slidably connected in the trigger guide hole, which can position the trigger guide rod 8 to avoid shaking. The strip groove 401 is opened along the radial direction of the guide member 4 to facilitate the extension of the limiting piece 801.

[0042] In this embodiment, please refer to Figure 9 The support plate 9 has a circular through hole 901 in the middle and is slidably connected to the trigger guide rod 8, which can position the trigger guide rod 8 to prevent it from shaking.

[0043] In this embodiment, please refer to Figure 8 and Figure 9The sliding sleeve 11 includes an inner sleeve 1101 and an outer sleeve 1102. The top end of the inner sleeve 1101 is fixedly connected to the bottom end of the guide member 4, and the bottom end of the outer sleeve 1102 is fixedly connected to the top of the support plate 9. The inner sleeve 1101 has a boss-shaped structure, and a strip-shaped through hole is provided on the top side wall of the inner sleeve 1101 to facilitate the extension of the limiting piece 801. The boss-shaped inner sleeve 1101 can use the buoyancy of the flood to drive the float 5 to float upwards during floods. The float 5 applies a downward force to the trigger guide rod 8 through a lever, causing the trigger guide rod 8 to move downwards, and the limiting piece 801 is fully extended. The state changes to a semi-closed state and slides into the inner sleeve 1101. The inner sleeve 1101 slides upward under the action of the spring 10's release and extension. After the flood recedes, the float 5 descends under the action of gravity, causing the trigger guide rod 8 to move upward. The guide 4 compresses the spring 10 under the worker's downward reset force (the inner sleeve 1101 slides downward). The limiting piece 801 changes from a semi-closed state to a fully open state under the downward pressure at the bottom of the guide 4 and the upward force of the trigger guide rod 8. As the limiting piece 801 fully unfolds, the end away from the hinge extends into the limiting groove opened in the guide hole, completing the compression and reset of the spring 10.

[0044] This invention also provides a bridge railing; please refer to [link / reference]. Figure 1 , Figure 3 and Figure 5The bridge railing uses the aforementioned lever-triggered railing flipping drive device. The bridge railing also includes a railing body 1, a support member 2, and a flipping member 3. The railing body 1 is hinged to the top of the bridge beam. One end of the support member 2 is hinged to the railing body 1, and the other end is hinged to the flipping member 3, supporting the railing body 1. The flipping member 3 is slidably disposed within the guide hole, with its top end hinged to one end of the support member 2 and its bottom end hinged to the top end of the guide member 4. In this application, a drive mechanism is added to drive the guide member 4 to move up and down, and a trigger mechanism is added to the drive mechanism. The flipping member 3 is designed as a columnar structure and arranged together with the guide member 4 within the guide hole. The top end of the flipping member 3 is hinged to the support member 2. 2. Hinged, the bottom end is hinged to the guide member 4. In daily use, the flipping member 3 and the guide member 4 are arranged as a whole in the guide hole under the limiting snap-fit ​​of the limiting piece 801. The top of the flipping member 3, which is hinged to the support member 2, provides a support point for the support member 2. The support member 2 supports the guardrail body 1 and completes the daily protection of the guardrail body 1. When a flood comes, the float 5 is subjected to an upward force, which applies a downward force to the trigger guide rod 8 through the crossbar 6, completing the trigger release of the drive mechanism. The spring 10 in the drive mechanism applies an upward force to the guide member 4 and transmits it to the flipping member 3. The flipping member 3 floats upward until it slides completely out of the guide hole. During the upward floating, the flipping member 3 drives one end of the support member 2 to move upward, while the guardrail body 1 tilts inward (e.g. Figure 3 As shown, when the flipping component 3 slides completely out of the guide hole, the guardrail body 1 flips inward under gravity. The length design of the flipping component 3 and the support component 2 ensures that the guardrail body 1 flips inward to a horizontal position. This avoids the situation where the guardrail body 1 obstructs floodwaters and floating debris, causing significant siltation and damage to the bridge superstructure. It also avoids high-risk operations for construction workers before floods and reduces the waste of manpower caused by dismantling guardrails. When the flood recedes, the guardrail body 1 is lifted, and the flipping component 3 changes from a horizontal to a vertical position during this process. When the flipping component 3 is vertical, a downward force is applied to it. 3. Re-enter the guide hole until the flipping part 3 is completely submerged in the guide hole. The float 5 descends under the action of gravity, causing the trigger guide rod 8 to move upward. Under the downward reset force of the worker, the guide part 4 compresses the spring 10 (the inner sleeve 1101 slides downward). Under the downward pressure at the bottom of the guide part 4 and the upward force of the trigger guide rod 8, the limiting piece 801 changes from a half-closed state to a fully open state. As the limiting piece 801 is fully unfolded, the end away from the hinge extends into the limiting groove opened in the guide hole, completing the compression and reset of the spring 10. The top of the flipping part 3, which is submerged in the guide hole and hinged with the support part 2, once again provides a support point for the support part 2. The support part 2 supports the guardrail body 1 and completes the daily protection of the guardrail body 1.

[0045] In this embodiment, please refer to Figure 3 The guardrail body 1 includes a base 101, posts 102, and crossbars 103. Multiple bases 101 are evenly distributed along the length of the bridge beam, and each base 101 is fixedly connected to the top of the bridge beam. Multiple posts 102 are hinged to the bases 101, with the post 102 bent in the middle and protruding outwards. Multiple sets of crossbars 103 are fixedly connected to the posts 102. By setting two posts 102 as a group and adding multiple sets of crossbars 103 between two posts 102, the guardrail body 1 on the bridge is divided into multiple groups. This modular design allows for easy replacement of damaged parts in daily use should a vehicle accident occur, facilitating installation and maintenance. Furthermore, the modular guardrail body 1 also facilitates reinstallation after floods.

[0046] In this embodiment, please refer to Figure 3 and Figure 5 The flipping component 3 is a columnar structure. The sum of the lengths of the flipping component 3 and the support component 2 minus the distance between the two hinge points on the main body of the guardrail 1 is greater than or equal to the distance between the base 101 and the guide hole. The upward floating height of the guide component 4 and the float 5 is equal to the length of the flipping component 3. By designing the lengths of the flipping component 3, the support component 2 and the guide component 4, it can be ensured that the main body of the guardrail 1 flips inward to a horizontal arrangement.

[0047] In summary, the lever-triggered guardrail flipping drive device and bridge guardrail of the present invention effectively overcome the various shortcomings of the prior art.

[0048] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A lever activated guardrail flip drive comprising: The trigger mechanism and the driving mechanism are included; The trigger mechanism is arranged in the groove opened in the bottom of the bridge beam body, and includes a float, a crossbar, a support seat and a trigger guide rod; the support seat is fixedly connected to the bottom of the groove, and a crossbar sleeve is hingedly connected to the support seat; the crossbar sleeve is in sliding connection with the crossbar; one end of the crossbar is fixedly connected to the float, and the other end is hingedly connected to the bottom end of the trigger guide rod; the trigger guide rod is arranged in the vertically opened guide hole of the bridge beam body and slides up and down along the guide hole under the driving of the float; a limiting assembly is hingedly connected to the trigger guide rod; the limiting assembly is folded and unfolded under the driving of the trigger guide rod, and is used for triggering and resetting the driving mechanism; The driving mechanism is arranged in the vertically opened guide hole of the bridge beam body, and includes a support disc, a spring, a sliding sleeve and a guide piece; the support disc is arranged inside the guide hole, and the top end of the support disc is fixedly connected to the bottom end of the spring; the top end of the spring is connected to the guide piece, and the spring is used for driving the guide piece to move upward along the guide hole; the sliding sleeve is arranged inside the spring and is used for triggering and releasing the spring and completing the resetting work of the spring in cooperation with the limiting assembly; The limiting assembly includes two limiting sheets which are vertically arranged along the radial direction of the trigger guide rod; the limiting sheets are fixedly connected with limiting protrusions and are provided with limiting grooves; the limiting protrusions of one limiting sheet are matched with the limiting grooves of the other limiting sheet; The bottom end of the guide piece is provided with a trigger guide hole and a strip-shaped groove; the axis of the trigger guide hole coincides with the axis of the guide piece; and the strip-shaped groove is opened along the radial direction of the guide piece.

2. The lever activated guardrail flip drive of claim 1, wherein: The support seat is at least three, and is evenly distributed along the center of the groove; the center of the groove coincides with the center of the guide hole.

3. The lever activated guardrail flip drive of claim 1, wherein: The middle part of the support disc is provided with a circular through hole and is in sliding connection with the trigger guide rod.

4. The lever activated guardrail flip drive of claim 1, wherein: The sliding sleeve includes an inner sleeve and an outer sleeve; the inner sleeve is in the form of a boss; the top end of the inner sleeve is fixedly connected to the bottom end of the guide piece, and the top side wall is provided with a strip-shaped through hole; and the bottom end of the outer sleeve is fixedly connected to the top of the support disc.

5. A bridge barrier, characterized by: The bridge guardrail adopts the lever trigger type guardrail turnover driving device according to any one of claims 1-4; the bridge guardrail further includes a guardrail body, a support piece and a turnover piece; The guardrail body is hingedly connected to the top of the bridge beam body; One end of the support piece is hingedly connected to the guardrail body, and the other end is hingedly connected to the turnover piece, and is used for supporting the guardrail body; The turnover piece is slidingly arranged in the guide hole, and the top end is hingedly connected to one end of the support piece, and the bottom end is hingedly connected to the top end of the guide piece.

6. The bridge guardrail of claim 5, wherein: The guardrail body includes a base, a stand and a crossbar; the base is multiple and is evenly distributed along the length direction of the bridge beam body; the multiple bases are fixedly connected to the top of the bridge beam body; the stand is multiple and is hingedly connected to the base; the middle part of the stand is bent and protrudes outward; and the crossbar is multiple and is fixedly connected to the stand.

7. The bridge guardrail of claim 6, wherein: The length of the overturning member and the support member minus the distance between the two hinge points on the guardrail main body is equal to the distance between the base and the guide hole.

8. The bridge guardrail of claim 7, wherein: The height of the up-and-down sliding of the guide member is equal to the length of the overturning member.

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