Box girder edge protection device

Abstract

This utility model provides a box girder edge protection device, belonging to the field of bridge construction technology. It includes a support frame, tie rods, tension ropes, and an expansion joint. The support frame is vertically arranged and runs along the length of the box girder. The lower end of the support frame is fixedly connected to the box girder, and a protective net is installed on the support frame. The tie rod is installed on one side of the support frame, arranged at an angle, with its upper end fixedly connected to the support frame and its lower end fixedly connected to the box girder. The tension rope is installed on one side of the support frame, with its upper end fixedly connected to the upper end of the support frame. The expansion joint is installed on the box girder and located on one side of the support frame. The expansion joint has a moving part, and the lower end of the tension rope is fixedly connected to the moving part. This box girder edge protection device effectively solves the problem of no protection on both sides of the beam surface. The protective net can directly prevent personnel from falling, reducing the probability of falls from heights and ensuring the safety of construction workers.

Description

Technical Field

[0001] This utility model belongs to the field of bridge construction technology, and more specifically, it relates to a protective device for the edge of a box girder. Background Technology

[0002] In the construction of modern high-speed railways, box girder construction is a crucial step. As route planning increasingly demands adaptability to terrain, high-speed railways often need to traverse complex landscapes such as valleys and rivers, leading to a continuous increase in bridge pier height. During box girder construction, when the piers are too high, workers must perform a series of tasks on the girder surface, such as rebar tying, formwork installation, and concrete pouring.

[0003] However, the current construction situation presents significant safety hazards. The sides of the beams are often open and unprotected, lacking effective safety measures. Since the beams can be tens of meters or even higher above the ground, workers are highly susceptible to falls from heights if they make operational errors or slip, seriously threatening their lives. Utility Model Content

[0004] The purpose of this utility model is to provide a protective device for the edge of a box girder, so as to solve the technical problem that accidents are prone to occur during bridge construction due to the lack of protection on both sides of the box girder.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a box girder edge protection device, comprising:

[0006] The support frame is arranged vertically and is set along the length of the box girder; the lower end of the support frame is fixedly connected to the box girder, and the support frame is provided with a protective net for shielding the outer edge of the box girder;

[0007] A tie rod is installed on one side of the support frame; the tie rod is arranged at an angle, with its upper end fixedly connected to the support frame and its lower end used for fixed connection to the box girder;

[0008] A tension rope is installed on one side of the support frame; the upper end of the tension rope is fixedly connected to the upper end of the support frame.

[0009] An extension adjuster is installed on the box girder and located on one side of the support frame; the extension adjuster is provided with an adjustable movable part, and the lower end of the tension rope is fixedly connected to the movable part.

[0010] In one possible implementation, the support frame includes a rectangular frame and a plurality of horizontal and vertical rods fixedly installed within the rectangular frame, the horizontal and vertical rods dividing the interior of the rectangular frame into multiple installation areas; the protective net is installed on the rectangular frame, the horizontal rods or the vertical rods, and is used to shield the multiple installation areas.

[0011] In one possible implementation, there are multiple protective nets, each corresponding to one of the multiple installation areas.

[0012] In one possible implementation, the rectangular frame, the horizontal bar, and the vertical bar are all hollow tubular components.

[0013] In one possible implementation, the lower end of the rectangular frame is provided with multiple legs, and the lower end of each leg is provided with a connecting hole; multiple fastening bolts that mate with the connecting holes are prefabricated and installed on the box girder.

[0014] In one possible implementation, the number of tie rods is multiple, and they are spaced apart along the length of the support frame.

[0015] In one possible implementation, there are multiple tension ropes and multiple telescopic adjusters, and they correspond one-to-one; the multiple tension ropes are arranged at intervals along the length direction of the support frame.

[0016] In one possible implementation, the moving part is provided with a hook, and the lower end of the tension rope is connected to the hook.

[0017] In one possible implementation, the telescopic adjuster includes a mounting block, a first screw, and a second screw. The mounting block has screw holes at both its upper and lower ends, with the threads of the two screw holes having opposite directions. The first screw is threaded into the screw hole at the lower end of the mounting block, and the second screw is threaded into the screw hole at the upper end of the mounting block. The end of the first screw away from the second screw is mounted on the box girder, and the second screw is the moving part. The hook is mounted on the end of the second screw away from the first screw.

[0018] In one possible implementation, the telescopic adjuster further includes a fixing bolt for fixed installation on the box girder, the bolt having a retaining ring, and the end of the first screw away from the second screw having a hook connected to the retaining ring.

[0019] The beneficial effects of the box girder edge protection device provided by this utility model are as follows: Compared with the prior art, the box girder edge protection device of this utility model requires assembly before use. A support frame is installed on one side of the upper end of the box girder, and the support frame is arranged vertically along the length of the box girder; the lower end of the support frame is fixed at a suitable position on the box girder; next, a tie rod is installed on one side of the support frame, with the upper end of the tie rod fixed to the support frame and the lower end fixed to the box girder, ensuring a reasonable tilt angle of the tie rod; then, the upper end of the tension rope is connected to the upper end of the support frame, and the lower end is fixed to the moving part of the telescopic adjuster. The moving part is adjusted by the telescopic adjuster to keep the tension rope taut, thereby enhancing the stability of the support frame. This method effectively solves the problem of no protection on both sides of the beam surface. The protective net can directly prevent personnel from falling, reducing the probability of falls from heights and ensuring the safety of construction workers. The tie rod and tension rope enhance the stability of the support frame, allowing the device to better adapt to complex construction environments. The telescopic adjuster can adjust the tension of the tension rope according to the actual situation, which improves the applicability and flexibility of the device and provides a strong guarantee for the safe construction of high-speed railway box girders. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of the box girder edge protection device provided in this embodiment of the utility model;

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 A schematic diagram showing the usage status of the box girder edge protection device provided in this embodiment of the utility model.

[0024] The following are the labeling elements in the figure:

[0025] 10. Support frame; 11. Protective net; 12. Rectangular frame; 13. Horizontal bar; 14. Vertical bar; 15. Installation area; 16. Support leg; 17. Fastening bolt; 20. Tie rod; 30. Tightening rope; 40. Telescopic adjuster; 41. Hook; 42. Mounting block; 43. First screw; 44. Second screw; 45. Fixing bolt; 46. Clamping ring; 50. Box girder. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] Please see Figures 1 to 3 The edge protection device for box girders provided by this utility model will now be described. An edge protection device for box girders includes a support frame 10, a tie rod 20, a tension rope 30, and a telescopic adjuster 40. The support frame 10 is arranged vertically and along the length of the box girder 50. The lower end of the support frame 10 is fixedly connected to the box girder 50, and a protective net 11 for covering the outer edge of the box girder 50 is provided on the support frame 10. The tie rod 20 is installed on one side of the support frame 10. The tie rod 20 is arranged at an angle, with its upper end fixedly connected to the support frame 10 and its lower end fixedly connected to the box girder 50. The tension rope 30 is installed on one side of the support frame 10. The upper end of the tension rope 30 is fixedly connected to the upper end of the support frame 10. The telescopic adjuster 40 is installed on the box girder 50 and located on one side of the support frame 10. The telescopic adjuster 40 has an adjustable movable part, and the lower end of the tension rope 30 is fixedly connected to the movable part.

[0031] Compared with the prior art, the box girder edge protection device provided by this utility model requires assembly of the entire box girder edge protection device first. The support frame 10 is installed on one side of the upper end of the box girder 50, and the support frame 10 is arranged vertically along the length of the box girder 50; the lower end of the support frame 10 is fixed at a suitable position on the box girder 50; next, a tie rod 20 is installed on one side of the support frame 10, with the upper end of the tie rod 20 fixed to the support frame 10 and the lower end fixed to the box girder 50, ensuring a reasonable tilt angle for the tie rod 20; then, the upper end of the tension rope 30 is connected to the upper end of the support frame 10, and the lower end is fixed to the moving part of the telescopic adjuster 40. The moving part is adjusted by the telescopic adjuster 40 to keep the tension rope 30 taut, thereby enhancing the stability of the support frame 10. This method effectively solves the problem of no protection on both sides of the beam surface. The protective net 11 can directly prevent personnel from falling, reducing the probability of high-altitude fall accidents and ensuring the safety of construction workers. The tie rod 20 and tension rope 30 enhance the stability of the support frame 10, enabling the device to better adapt to complex construction environments. The telescopic adjuster 40 can adjust the tension of the tension rope 30 according to actual conditions, improving the applicability and flexibility of the device and providing strong protection for the safe construction of the high-speed railway box girder 50.

[0032] Please see Figure 1 The support frame 10 adopts a rectangular frame 12 with horizontal bars 13 and vertical bars 14. These bars divide the interior of the rectangular frame 12 into multiple installation areas 15. Protective netting 11 is installed on the rectangular frame 12, horizontal bars 13, or vertical bars 14, covering the multiple installation areas 15 to form a tight protective surface. This structural design enhances the overall strength and stability of the support frame 10 through the crisscrossing bars; the multiple installation areas 15 facilitate precise installation of the protective netting 11, ensuring comprehensive protection without blind spots and blocking the risk of personnel falling from all directions, further improving the safety and reliability of the box girder edge protection device.

[0033] Preferably, multiple protective nets 11 are provided, each corresponding one-to-one with a plurality of installation areas 15 within the support frame 10. Each installation area 15 is matched with an independent protective net 11. This one-to-one correspondence design allows the protective net 11 to fit tightly against each installation area 15, enhancing the targetedness and sealing of the protection. At the same time, it facilitates the disassembly, replacement, or maintenance of individual protective nets 11, improving the flexibility and practicality of the device, ensuring that every area adjacent to the box girder 50 is effectively protected, and further reducing the risk of falls from heights.

[0034] As a specific embodiment of the box girder edge protection device provided by this utility model, the rectangular frame 12, horizontal bar 13, and vertical bar 14 of the bearing frame 10 are all made of hollow tubular components. The hollow structure, while ensuring the strength of the components, significantly reduces the overall weight, facilitating handling and installation by construction personnel and improving work efficiency. The hollow nature of the tubular material gives it a certain elastic deformation capacity, which can buffer the impact force generated by accidental collisions during construction, reducing the risk of structural damage.

[0035] Please see Figure 1 and Figure 2 As a specific embodiment of the box girder edge protection device provided by this utility model, a plurality of legs 16 are provided at the lower end of the rectangular frame 12. Connecting holes are opened at the lower ends of the legs 16 to connect with pre-fabricated fastening bolts 17 on the box girder 50. During installation, the legs 16 are fitted into the bolts through the connecting holes and tightened, achieving rapid positioning and fixation of the support frame 10 and the box girder 50. This method standardizes and modularizes the installation of the support frame 10, avoiding complex operations such as on-site drilling and improving installation efficiency; the bolted connection structure is stable and reliable, capable of withstanding large loads, ensuring that the protection device does not shift or overturn during construction.

[0036] Please see Figure 1 As a specific embodiment of the box girder edge protection device provided by this utility model, multiple tie rods 20 are arranged at intervals along the length of the support frame 10 to form a uniformly distributed support system. Each tie rod 20 is inclinedly connected to the support frame 10 and the box girder 50, distributing the load on the support frame 10 to different positions of the box girder 50 through multi-point support, avoiding structural deformation caused by concentrated force at a single point. The spaced tie rods 20 can enhance the overall rigidity of the support frame 10 along its length, reduce swaying or displacement caused by large spans, and improve the stability of the protection device.

[0037] Please see Figure 1 As a specific embodiment of the box girder edge protection device provided by this utility model, multiple tension ropes 30 and one-to-one corresponding telescopic adjusters 40 are arranged at intervals along the length of the bearing frame 10. Each telescopic adjuster 40 can independently adjust the tension of the corresponding tension rope 30. Through multi-point distributed connection, the upper load of the bearing frame 10 is evenly transferred to the box girder 50, avoiding single-point force concentration. The interval arrangement can enhance the lateral restraint of the bearing frame 10 along the length direction, reduce swaying or deformation caused by large span, and improve the overall resistance to wind load and construction load.

[0038] Please see Figure 1 and Figure 2The moving part is equipped with a hook 41 that connects to the lower end of the tension rope 30. The hook structure of the hook 41 enables quick connection and disconnection between the tension rope 30 and the telescopic adjuster 40. During installation, simply hook the lower end of the tension rope 30 directly into the hook 41; no complicated tools are required to secure it. During adjustment, the telescopic adjuster 40 drives the moving part to move, and the hook 41 simultaneously tensions or relaxes the tension rope 30, allowing for convenient adjustment of the tension.

[0039] Please see Figure 1 and Figure 2 As a specific embodiment of the box girder edge protection device provided by this utility model, the telescopic adjuster 40 includes a mounting block 42, a first screw 43, and a second screw 44. The mounting block 42 has screw holes at both its upper and lower ends, and the threads of the two screw holes rotate in opposite directions. The first screw 43 is threaded into the screw hole at the lower end of the mounting block 42, and the second screw 44 is threaded into the screw hole at the upper end of the mounting block 42. The end of the first screw 43 away from the second screw 44 is mounted on the box girder 50, and the second screw 44 is a movable part. A hook 41 is mounted on the end of the second screw 44 away from the first screw 43. The telescopic adjuster 40 adopts a combined structure of the mounting block 42, the first screw 43, and the second screw 44. The threads of the screw holes at the upper and lower ends of the mounting block 42 rotate in opposite directions, and the first screw 43 and the second screw 44 are respectively connected to the mounting block 42 through reverse threads. During installation, the first screw 43 is fixed to the box girder 50, and the end of the second screw 44 (moving part) is equipped with a hook 41 to connect to the lower end of the tension rope 30. When the mounting block 42 is rotated, due to the reverse thread action, the first screw 43 and the second screw 44 move synchronously inward or outward, thereby tensioning or releasing the tension rope 30. This mechanical thread transmission enables precise adjustment of the tension of the tension rope 30. The reverse thread structure ensures synchronous screw movement and balanced force, avoiding structural displacement caused by unilateral force. During operation, tension adjustment can be completed simply by rotating the mounting block 42, without the need for complex tools. At the same time, the threaded connection has a self-locking characteristic, which can firmly maintain the tension after adjustment, prevent loosening, and improve the reliability of the device. The mounting block 42 is provided with a through-hole slot, and the adjacent ends of the first screw 43 and the second screw 44 are located in the operating hole slot. Bosses can be provided at the upper and lower ends of the mounting block 42, and two screw holes pass through the two bosses respectively.

[0040] Please see Figure 1 and Figure 2The telescopic adjuster 40 also includes a fixing bolt 45 for fixed installation on the box girder 50. The bolt has a retaining ring 46, and the end of the first screw 43 furthest from the second screw 44 has a hook 41 that connects to the retaining ring 46. In this embodiment, the telescopic adjuster 40 is connected and fixed to the box girder 50 via the fixing bolt 45, the retaining ring 46, and the hook 41. The fixing bolt 45 is pre-installed on the box girder 50, and the bolt has a retaining ring 46. The end of the first screw 43 furthest from the second screw 44 has a hook 41. Through the hook 41 engaging with the retaining ring 46, the first screw 43 is movably connected to the fixing bolt 45. This design forms a three-stage connection structure of "bolt fixing - retaining ring positioning - hook connection," ensuring a stable connection between the first screw 43 and the box girder 50 while allowing it to rotate and adjust its angle within a certain range. During operation, the fixing bolt 45 is first embedded or fastened to the preset position of the box girder 50. The retaining ring 46 can slide along the bolt rod to a suitable height and then be fixed. Then, the retaining ring 46 is hooked by the hook 41 at the end of the first screw 43 to complete the initial positioning of the telescopic adjuster 40. Subsequently, the tension of the tension rope 30 is adjusted by rotating the mounting block 42 (which is in reverse thread engagement with the first screw 43 and the second screw 44).

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A box girder edge protection device, characterized in that, include: The support frame is arranged vertically and is set along the length of the box girder; the lower end of the support frame is fixedly connected to the box girder, and the support frame is provided with a protective net for shielding the outer edge of the box girder; A tie rod is installed on one side of the support frame; the tie rod is arranged at an angle, with its upper end fixedly connected to the support frame and its lower end used for fixed connection to the box girder; A tension rope is installed on one side of the support frame; the upper end of the tension rope is fixedly connected to the upper end of the support frame. An extension adjuster is installed on the box girder and located on one side of the support frame; the extension adjuster is provided with an adjustable movable part, and the lower end of the tension rope is fixedly connected to the movable part.

2. The box girder edge protection device as described in claim 1, characterized in that, The support frame includes a rectangular frame and several horizontal and vertical rods fixedly installed within the rectangular frame. The horizontal and vertical rods divide the interior of the rectangular frame into multiple installation areas. The protective net is installed on the rectangular frame, the horizontal rods, or the vertical rods and is used to shield the multiple installation areas.

3. The box girder edge protection device as described in claim 2, characterized in that, There are multiple protective nets, and each net corresponds to one of the multiple installation areas.

4. The box girder edge protection device as described in claim 2, characterized in that, The rectangular frame, the horizontal bar, and the vertical bar are all hollow tubular components.

5. The box girder edge protection device as described in claim 2, characterized in that, The lower end of the rectangular frame is provided with multiple support legs, and the lower end of each support leg is provided with a connecting hole; multiple fastening bolts that mate with the connecting holes are prefabricated and installed on the box girder.

6. The box girder edge protection device as described in claim 1, characterized in that, The number of tie rods is multiple, and they are arranged at intervals along the length of the support frame.

7. The box girder edge protection device as described in claim 1, characterized in that, The number of tension ropes and the number of telescopic adjusters are both multiple and correspond one-to-one; the multiple tension ropes are arranged at intervals along the length direction of the support frame.

8. The box girder edge protection device as described in claim 1, characterized in that, The movable part is provided with a hook, and the lower end of the tension rope is connected to the hook.

9. The box girder edge protection device as described in claim 8, characterized in that, The telescopic adjuster includes a mounting block, a first screw, and a second screw. The mounting block has screw holes at both its upper and lower ends, with the threads of the two screw holes having opposite directions. The first screw is threaded into the screw hole at the lower end of the mounting block, and the second screw is threaded into the screw hole at the upper end of the mounting block. The end of the first screw away from the second screw is mounted on the box girder, and the second screw is the moving part. The hook is mounted on the end of the second screw away from the first screw.

10. The box girder edge protection device as described in claim 9, characterized in that, The telescopic adjuster also includes a fixing bolt for fixing and installing on the box girder. The bolt is provided with a retaining ring, and the end of the first screw away from the second screw is provided with a hook connected to the retaining ring.

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