Electrochemical corrosion-resistant structure for improving durability of steel structure bridge

Abstract

The utility model discloses an electrochemistry anticorrosion structure for improving the durability of steel structure bridge relates to bridge anticorrosion technical field, including steel structure bridge main part and bridge support, the lower extreme of steel structure bridge main part is fixedly connected with bridge support, and the lower extreme of steel structure bridge main part is provided with protection mechanism, and the protection mechanism includes two L type aprons, and the welding joint of steel structure bridge main part and bridge support is covered transversely through two L type aprons, can directly insulate rainwater, snow water, the salt content in air and the corrosive medium such as industrial dust, avoid medium penetration weld and cause electrochemistry corrosion, and the corrosion inducement is blocked from the physical level, and the zinc plating layer can be oxidized as the anode of spontaneous micro - battery in electrolyte environment, and the L type apron becomes cathode and is exempted from corrosion, and then indirectly protects steel structure bridge main part, forms " physical insulation + electrochemistry protection " dual anticorrosion system, and effectively promotes the durability of bridge joint.

Description

Technical Field

[0001] This utility model relates to the field of bridge corrosion resistance technology, and in particular to an electrochemical corrosion-resistant structure for improving the durability of steel bridges. Background Technology

[0002] Steel structure bridges are a type of bridge that uses steel as its primary load-bearing structure. Their core function is to cross natural obstacles, such as rivers and canyons, or transportation routes, such as railways and highways. Their load-bearing structure consists of steel beams, steel columns, and steel trusses, effectively transferring and distributing loads from vehicles and pedestrians to ensure traffic safety. Functionally, steel structure bridges are highly adaptable to different spans, suitable for large-span and even ultra-large-span bridges, meeting the needs of crossing complex terrains such as wide waterways and deep canyons. Furthermore, the high strength and relatively light weight of steel reduce the load-bearing pressure on the bridge foundation and lower the requirements for geological conditions. In addition, steel structural components can be prefabricated in factories, facilitating on-site installation, shortening the construction cycle, and minimizing disruption to surrounding traffic and the environment. During later maintenance, steel components are easy to inspect, repair, and replace, ensuring long-term bridge capacity and structural stability. They are suitable for various transportation scenarios, including highways, railways, and urban rail transit.

[0003] However, during the implementation of the above technical solution, at least the following technical problems were discovered: Steel structure bridges are exposed to the natural environment for a long time. When they come into contact with substances such as rainwater, oxygen in the atmosphere, industrial dust, and salt spray, an electrolyte solution will form on the surface of the steel. Due to the active chemical properties of the steel itself, electrochemical cells are easily formed, which will cause electrochemical corrosion. At this time, the steel will gradually rust and become thinner, and even develop holes, which will reduce the load-bearing capacity and stability of the bridge and affect the structural safety of the bridge. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an electrochemical anti-corrosion structure for improving the durability of steel bridges. It solves the problem that when steel bridges are exposed to the natural environment for extended periods, contact with rainwater, atmospheric oxygen, industrial dust, salt spray, and other substances, an electrolyte solution forms on the steel surface. Due to the reactive chemical properties of steel, this easily forms an electrochemical cell, triggering electrochemical corrosion. The steel gradually rusts and thins, even developing holes, leading to a decrease in the bridge's load-bearing capacity and stability, thus affecting the bridge's structural safety.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An electrochemical corrosion-resistant structure for improving the durability of steel bridges includes a steel bridge body and bridge bearings. The lower end of the steel bridge body is fixedly connected to the bridge bearings. A protective mechanism is provided at the lower end of the steel bridge body, and the protective mechanism includes two L-shaped cover plates. Both L-shaped cover plates are galvanized, and both L-shaped cover plates are placed horizontally to cover the connection between the main body of the steel bridge and the bridge support.

[0006] Preferably, the lower end of the main body of the steel structure bridge is provided with two parallel U-shaped connecting plates, and each of the two U-shaped connecting plates is provided with a rotating shaft, and the two rotating shafts correspond to the positions of the two L-shaped cover plates.

[0007] Preferably, both the front and rear sides of the two rotating shafts are rotatably connected to the inner wall of the corresponding U-shaped connecting plate, and slots are provided through the surfaces of the two rotating shafts. The two slots are the same size as the two L-shaped cover plates, and the ends of the two L-shaped cover plates are fixedly connected to the rotating shafts through the slots.

[0008] Preferably, a bidirectional lead screw is provided between the two U-shaped connecting plates. The bidirectional lead screw is located at the upper end of the two U-shaped connecting plates, and a horizontal plate is rotatably connected to both the front and rear sides of the bidirectional lead screw. The lower surface of the two horizontal plates is fixedly connected to the upper surface of the two U-shaped connecting plates.

[0009] Preferably, a knob is movably connected to the rear surface of the horizontal plate at the rear end, and the front end of the knob passes through the corresponding horizontal plate and is fixedly connected to the rear surface of the bidirectional lead screw.

[0010] Preferably, both ends of the bidirectional lead screw are threaded with limit blocks, and the lower surfaces of the two limit blocks abut against the upper surfaces of the two U-shaped connecting plates.

[0011] Preferably, each of the two limiting blocks has two snap-fit ​​grooves at one end opposite to the other, and the two snap-fit ​​grooves have the same thickness as the L-shaped cover plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. In terms of corrosion protection, on the one hand, by using two L-shaped cover plates to cover the welded joints between the main body of the steel bridge and the bridge bearings, it can directly isolate corrosive media such as rainwater, snow water, salt in the air and industrial dust, and prevent the media from penetrating the weld and causing electrochemical corrosion. It blocks the corrosion initiation factors from a physical level. On the other hand, the surface of the L-shaped cover plates is galvanized. In an electrolyte environment, the zinc coating can act as the anode of a self-generating micro-battery and be preferentially oxidized, making the L-shaped cover plate itself a cathode and protected from corrosion. This indirectly protects the main body of the steel bridge, forming a dual anti-corrosion system of "physical isolation + electrochemical protection", which effectively improves the durability of the bridge joints.

[0013] 2. In terms of ease of maintenance and operation, the rotating shaft inside the U-shaped connecting plate can control the L-shaped cover to rotate 90 degrees. When it is necessary to reinforce or remove the connection, it can quickly free up sufficient operating space, avoiding the cumbersome and time-consuming disassembly of traditional fixed protective structures. At the same time, the design of the limit block, the two-way screw, and the knob can drive the limit block to move without additional tools, simplifying the switching operation between the L-shaped cover's protective state and the flip state, and greatly improving the efficiency of maintenance operations.

[0014] 3. In terms of structural stability, in the protective state, the bidirectional screw-driven limiting block abuts against the upper surface of the L-shaped cover plate, which can resist the vibration of the bridge caused by vehicle traffic and wind, prevent the L-shaped cover plate from shifting, and ensure the continuity of protection. In the flipped state, the limiting block is engaged with the two ends of the L-shaped cover plate through the locking groove at the opposite end, which can stably maintain the flipped posture of the L-shaped cover plate, avoid shaking during operation, provide a stable environment for maintenance work, and eliminate the need for additional fixing parts, further optimizing the practicality and reliability of the structure and contributing to the long-term stable use of steel structure bridges. Attached Figure Description

[0015] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0016] Figure 1 This is a structural diagram of the entire utility model; Figure 2 This is a structural diagram of the L-shaped cover plate of this utility model; Figure 3 This is a structural diagram of the U-shaped connecting plate of this utility model; Figure 4 This is a structural diagram of the bidirectional lead screw of this utility model.

[0017] Legend: 11. Main body of steel bridge; 12. Bridge bearing; 13. L-shaped cover plate; 14. U-shaped connecting plate; 15. Horizontal plate; 16. Limiting block; 17. Snap-fit ​​groove; 18. Two-way threaded rod; 19. Rotating shaft; 20. Knob; 21. Snap-fit ​​groove. Detailed Implementation

[0018] This application provides an electrochemical anti-corrosion structure for improving the durability of steel bridges. It effectively solves the problem that when steel bridges are exposed to the natural environment for a long time, and come into contact with substances such as rainwater, atmospheric oxygen, industrial dust, and salt spray, an electrolyte solution will form on the surface of the steel. Due to the active chemical properties of the steel itself, this easily forms an electrochemical cell, triggering electrochemical corrosion. At this time, the steel will gradually rust and thin, and even develop holes, leading to a decrease in the load-bearing capacity and stability of the bridge, affecting the structural safety of the bridge. Example

[0019] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in this application effectively addresses the problem that when steel structure bridges are exposed to the natural environment for a long time, and come into contact with substances such as rainwater, atmospheric oxygen, industrial dust, and salt spray, an electrolyte solution forms on the surface of the steel. Due to the active chemical properties of the steel itself, this easily forms an electrochemical cell, triggering electrochemical corrosion. The steel gradually rusts and thins, even developing holes, leading to a decrease in the bridge's load-bearing capacity and stability, thus affecting the bridge's structural safety. The overall approach is as follows: To address the problems existing in the prior art, this utility model provides an electrochemical anti-corrosion structure for improving the durability of steel structure bridges. The structure includes a steel bridge body 11 and bridge bearings 12. The lower end of the steel bridge body 11 is welded to the bridge bearings 12. A protective mechanism is provided at the lower end of the steel bridge body 11, comprising two L-shaped cover plates 13. Both L-shaped cover plates 13 are placed laterally to cover the connection between the steel bridge body 11 and the bridge bearings 12. This allows the two L-shaped cover plates 13 to cover and protect the connection between the steel bridge body 11 and the bridge bearings 12. The connection between the steel bridge body 11 and the bridge bearings 12 is a weak area with stress concentration and numerous structural gaps, making it highly susceptible to contact with corrosive media. By covering the connection, the two L-shaped cover plates 13 can directly isolate the connection from rainwater, snowmelt, fog droplets, salt in the air, industrial dust, etc., preventing these substances from adhering to the metal surface and penetrating into the weld gaps, thus reducing the causes of electrochemical corrosion from the source.

[0020] Both L-shaped cover plates 13 are galvanized. When the galvanized L-shaped cover plates 13 are exposed to electrolyte environments such as moisture and rainwater, the zinc coating will become the anode of the self-generating micro battery, preferentially losing electrons and being oxidized and corroded. Meanwhile, the L-shaped cover plates 13 will become the cathode of the micro battery, continuously receiving electrons transferred by zinc. The surface metal atoms will not lose electrons, thereby preventing the steel structure bridge body 11 from being corroded and achieving electrochemical corrosion resistance of the steel structure bridge body 11 by the L-shaped cover plates 13.

[0021] To flexibly control the L-shaped cover plate 13, two parallel U-shaped connecting plates 14 are installed at the lower end of the steel structure bridge body 11. Each U-shaped connecting plate 14 has a rotating shaft 19 inside for controlling the rotation of the L-shaped cover plate 13. The two rotating shafts 19 correspond to the positions of the two L-shaped cover plates 13, and both the front and rear surfaces of the two rotating shafts 19 are rotatably connected to the inner walls of the corresponding U-shaped connecting plates 14. Each rotating shaft 19 has a through-hole groove 21, the same size as the two L-shaped cover plates 13. The ends of the two L-shaped cover plates 13 are fixedly connected to the rotating shafts 19 through the grooves 21. By controlling the rotation of the two rotating shafts 19, the L-shaped cover plate 13 can be rotated. When workers need to adjust the steel structure bridge body 11 and bridge supports... When reinforcing or removing the connection at 12, the two rotating shafts 19 are rotated 90 degrees to make the two L-shaped cover plates 13 perpendicular to the bridge support 12. Through the cooperation of the U-shaped connecting plate 14, the rotating shaft 19 and the slot 21, the flexible flipping control of the L-shaped cover plates 13 is realized. This not only retains the function of the L-shaped cover plates 13 in covering and protecting the connection between the main body 11 of the steel structure bridge and the bridge support 12, but also allows the L-shaped cover plates 13 to be perpendicular to the bridge support 12 when reinforcement or removal of the connection is required, by rotating the rotating shaft 19 90 degrees. This provides sufficient space for the staff to operate and avoids the problems of cumbersome disassembly and reduced construction efficiency of traditional fixed protective structures. While ensuring the anti-corrosion effect, it significantly improves the convenience of bridge maintenance operations and further contributes to the long-term stable use of steel structure bridges.

[0022] To ensure the two L-shaped cover plates 13 maintain a more stable protective state, a bidirectional lead screw 18 is installed between the two U-shaped connecting plates 14. The bidirectional lead screw 18 is located at the upper end of the two U-shaped connecting plates 14, and a horizontal plate 15 is rotatably connected to both the front and rear sides of the bidirectional lead screw 18. The lower surfaces of the two horizontal plates 15 are fixedly connected to the upper surfaces of the two U-shaped connecting plates 14. A knob 20 is movably connected to the rear surface of the rear horizontal plate 15. The front end of the knob 20 passes through the corresponding horizontal plate 15 and is fixedly connected to the rear surface of the bidirectional lead screw 18. When the operator rotates the knob 20, it will drive the bidirectional lead screw 18 to rotate. Both ends of the bidirectional lead screw 18 are threaded with... Limiting blocks 16, the lower surfaces of both limiting blocks 16 abut against the upper surfaces of the two U-shaped connecting plates 14. When the protective mechanism protects the connection between the main body 11 of the steel bridge and the bridge support 12, the bidirectional screw 18 is rotated. At this time, the two limiting blocks 16 will move closer to each other as the bidirectional screw 18 rotates until the lower surfaces of the two limiting blocks 16 abut against the upper surfaces of the two L-shaped cover plates 13. At this time, the two limiting blocks 16 will limit the two L-shaped cover plates 13, providing stable limiting for their protective state, avoiding the displacement of the L-shaped cover plates 13 caused by vibration, wind, etc., and ensuring continuous protection of the connection between the main body 11 of the steel bridge and the bridge support 12.

[0023] When workers need to reinforce or remove the connection between the main body 11 of the steel bridge and the bridge bearing 12, they need to flip the two L-shaped cover plates 13. To stably keep the two L-shaped cover plates 13 in the flipped state, two locking grooves 17 are provided at the opposite ends of the two limiting blocks 16. The two locking grooves 17 have the same thickness as the L-shaped cover plates 13 and are positioned accordingly. After the two L-shaped cover plates 13 are flipped, the two limiting blocks 16 are controlled to move closer to each other. At this time, the two limiting blocks 16 will engage with the two ends of the two L-shaped cover plates 13 through the locking grooves 17. The two L-shaped cover plates 13 are locked in place by two limiting blocks 16, which allows them to remain stably flipped. This design allows the limiting blocks 16 to maintain a protective state by resisting the L-shaped cover plates 13, and also to engage with the L-shaped cover plates 13 by means of the snap-fit ​​groove 17 after the L-shaped cover plates 13 are flipped, thus stabilizing their flipped state and preventing the L-shaped cover plates 13 from shaking during operation. This provides a stable environment for the reinforcement and dismantling work at the connection between the main body 11 of the steel structure bridge and the bridge support 12. At the same time, no additional fixing parts are required, simplifying the operation process and further improving the convenience and efficiency of maintenance.

[0024] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An electrochemical corrosion-resistant structure for improving the durability of a steel structure bridge, comprising a steel structure bridge main body (11) and a bridge support (12), characterized in that, The lower end of the main body (11) of the steel structure bridge is fixedly connected to the bridge support (12). The lower end of the main body (11) of the steel structure bridge is provided with a protective mechanism, which includes two L-shaped cover plates (13). Both L-shaped cover plates (13) are galvanized, and both L-shaped cover plates (13) are placed horizontally to cover the connection between the main body (11) of the steel structure bridge and the bridge support (12).

2. The electrochemical corrosion-resistant structure for improving the durability of steel bridges as described in claim 1, characterized in that: The lower end of the main body (11) of the steel structure bridge is provided with two parallel U-shaped connecting plates (14). The interior of each U-shaped connecting plate (14) is provided with a rotating shaft (19), and the two rotating shafts (19) correspond to the positions of the two L-shaped cover plates (13).

3. The electrochemical corrosion-resistant structure for improving the durability of steel bridges as described in claim 2, characterized in that: Both front and rear sides of the two rotating shafts (19) are rotatably connected to the inner wall of the corresponding U-shaped connecting plate (14). The surfaces of the two rotating shafts (19) are provided with slots (21). The two slots (21) are the same size as the two L-shaped cover plates (13). The ends of the two L-shaped cover plates (13) are fixedly connected to the rotating shafts (19) through the slots (21).

4. The electrochemical corrosion-resistant structure for improving the durability of steel bridges as described in claim 2, characterized in that: A bidirectional lead screw (18) is provided between the two U-shaped connecting plates (14). The bidirectional lead screw (18) is located at the upper end of the two U-shaped connecting plates (14), and a horizontal plate (15) is rotatably connected to both the front and rear sides of the bidirectional lead screw (18). The lower surfaces of the two horizontal plates (15) are fixedly connected to the upper surfaces of the two U-shaped connecting plates (14).

5. An electrochemical corrosion-resistant structure for improving the durability of steel bridges as described in claim 4, characterized in that: A knob (20) is movably connected to the rear surface of the horizontal plate (15) located at the rear end. The front end of the knob (20) passes through the corresponding horizontal plate (15) and is fixedly connected to the rear surface of the bidirectional lead screw (18).

6. The electrochemical corrosion-resistant structure for improving the durability of steel bridges as described in claim 5, characterized in that: Both ends of the bidirectional lead screw (18) are threaded with limit blocks (16), and the lower surfaces of the two limit blocks (16) abut against the upper surfaces of the two U-shaped connecting plates (14).

7. An electrochemical corrosion-resistant structure for improving the durability of steel bridges as described in claim 6, characterized in that: Two locking slots (17) are provided at opposite ends of the two limiting blocks (16), and the two locking slots (17) have the same thickness as the L-shaped cover plate (13).

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