High-toughness seamless anticorrosion structure

Abstract

The utility model discloses a kind of high-tough seamless sealing anticorrosion structures, belong to bridge cable sealing protection technical field, high-tough seamless sealing anticorrosion structure includes the fiber cloth composite sealing tape wrapped in the outer surface of steel member and the sealing wrapping tape wrapped outside fiber cloth composite sealing tape, fiber cloth composite sealing tape includes sealing gum cast in the outer surface of steel member and at least one layer of wrapping immersed sealing gum in fiber mesh cloth.Under the joint action of fiber cloth composite sealing tape and sealing wrapping tape, high-tough seamless anticorrosion sealing structure can be formed, the sealing property of steel member is guaranteed, and under the action of fiber mesh cloth and sealing wrapping tape, the structural stability of sealing gum is also guaranteed, the use durability is improved, and the problem that sealing structure early cracking and causing steel member (especially cable) corrosion is avoided.

Description

Technical Field

[0001] This utility model relates to the field of bridge cable sealing and protection technology, and in particular to a high-toughness seamless sealing and corrosion-resistant structure. Background Technology

[0002] In cable-stayed bridges, the external protective structure is considered the lifeline of the cable-stayed bridge system, and it is a crucial protective measure to ensure the bridge's long-term durability and safe operation. A safe and durable external protective structure not only extends the service life of the bridge cable-stayed system and reduces maintenance costs, but also plays a vital role in ensuring the safe operation of the bridge. Currently, the main cable wires of cables are required to have an external protective structure that can provide a long-term seal, preventing external oxygen and humid air from entering the cable and thus avoiding corrosion of the main cable wires.

[0003] Current corrosion prevention measures typically employ two approaches: one is the traditional main cable corrosion prevention method, which involves establishing a sealed protective structure to isolate the internal steel wires of the main cable from the external environment, creating an airless environment to prevent corrosion; the other, while ensuring the airtightness of the protective system, adds an active dehumidification system to the main cable, actively injecting dry air to reduce the internal humidity of the main cable and prevent corrosion of the internal steel wires. Both approaches require the protective structure to maintain a long-term airtight seal. However, surveys of cable-stayed bridges currently in service in China reveal a widespread problem of early cracking of the external protective sealing structure of the cable system, leading to corrosion of the cable wires.

[0004] Therefore, there is an urgent need for an ideal protective structure that is durable, has a good sealing effect, and ensures the long-term performance of stay cables and suspenders. Utility Model Content

[0005] The purpose of this invention is to solve the above-mentioned technical problems and provide a high-toughness seamless sealing and anti-corrosion structure. Under the combined action of fiber cloth composite sealing tape and sealing wrapping tape, a seamless sealing structure can be formed to ensure the sealing performance of steel components. At the same time, under the action of fiber mesh cloth and sealing wrapping tape, the high toughness of the sealant can be guaranteed, improving the service durability of the sealing structure and avoiding the problem of early cracking of the sealing structure and corrosion of steel components. Especially when applied to bridge cables, it can effectively improve the anti-corrosion effect of bridge cables.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention discloses a high-toughness seamless sealing and anti-corrosion structure, including a fiber cloth composite sealing tape wrapped around the outer surface of a steel component and a sealing wrapping tape wrapped around the fiber cloth composite sealing tape. The fiber cloth composite sealing tape includes a sealant cast on the outer surface of the steel component and at least one layer of fiber mesh cloth wrapped around and immersed in the sealant.

[0007] Preferably, the fiber cloth composite sealing tape is a fiber-reinforced nano flame-retardant sealing tape, the fiber mesh cloth is a high-temperature resistant inorganic fiber mesh cloth, the sealant is a nano flame-retardant sealant, and the sealing wrapping tape is a fire-resistant and weather-resistant sealing wrapping tape.

[0008] Preferably, the nano flame-retardant sealant is a single-component nano flame-retardant sealant.

[0009] Preferably, the high-temperature resistant inorganic fiber mesh is a basalt fiber mesh.

[0010] Preferably, the fire-resistant and weather-resistant sealing wrapping tape is basalt fiber cloth impregnated with ceramicized silicone rubber.

[0011] Preferably, the thickness of the fiber-reinforced nano flame-retardant sealing tape is 2mm to 3mm, and the thickness of the fire-resistant sealing wrapping tape is 0.8mm to 1.5mm.

[0012] Preferably, the sealant is self-curing, and after curing, it forms a seamless bonding interface with the outer surface of the steel component and the fiber mesh.

[0013] Preferably, the wrapping direction of the sealing wrapping tape forms an angle of 45° to 60° with the axial direction of the steel component, and the wrapping is done in a splicing manner.

[0014] The present invention achieves the following technical advantages over the prior art:

[0015] In this invention, steel components (such as steel cables, steel columns, steel beams, and other steel components) are sequentially wrapped with fiber cloth composite sealing tape and sealing wrapping tape. The fiber cloth composite sealing tape comprises sealant and fiber mesh. The sealant is cast-in-place onto the outer surface of the steel component. This casting method ensures that there are no exposed areas on the outer surface of the steel component, forming a continuous and seamless sealing layer with the fiber mesh. This creates a seamless bonding interface with the outer surface of the steel component, ensuring airtightness and preventing air leakage. The fiber mesh, wrapped and composited on the sealant, provides effective support for the sealant, giving the sealing structure high toughness, thereby improving the stability of the sealing structure and the durability of the sealing effect. Simultaneously, the sealing wrapping tape ensures that there are no leaks or exposed areas on the fiber cloth composite sealing tape, further improving the sealing performance and the toughness of the sealing structure, enhancing its service durability, and preventing early cracking and corrosion of the steel component. This is particularly useful for addressing corrosion problems and sealing structure cracking issues in bridge cables.

[0016] Compared with the prior art, the other technical solutions of this utility model have also achieved the following technical effects:

[0017] Current anti-corrosion measures generally cannot achieve high temperature resistance, non-combustion, or non-dripping in fire environments, meaning they lack flame-retardant functionality in actual fires. However, this utility model's fiber cloth composite sealing tape uses fiber-reinforced nano flame-retardant sealing tape, high-temperature resistant inorganic fiber mesh, nano flame-retardant sealant, and fire-resistant and weather-resistant sealing wrapping tape—all high-temperature resistant and flame-retardant materials. This enables the high-toughness, seamless sealing and anti-corrosion structure to not only provide sealing and anti-corrosion functions but also high-temperature resistance and flame retardancy, avoiding cracking and combustion damage caused by high-temperature environments. Tests have proven that the entire protective structure also remains non-combustible and non-dripping even at 1100℃. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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 by analyzing these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the layer structure of the high-toughness seamless sealing and corrosion-resistant structure in the embodiments of this utility model;

[0020] Figure 2 This is a schematic diagram of the sealing wrapping tape wrapping process in an embodiment of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Cable; 2. Fiber cloth composite sealing tape; 3. Sealing wrapping tape; 21. Sealant; 22. Fiber mesh. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments analyzed and obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] The purpose of this invention is to provide a high-toughness, seamless, sealing and corrosion-resistant structure to solve the problems existing in the prior art. The combined action of cast-in-place sealant and sealing wrapping tape can ensure the sealing performance of steel components, while the action of fiber mesh and sealing wrapping tape can ensure the structural stability of the sealant, improve service durability, and avoid the problem of early cracking of the sealing structure and corrosion of steel components.

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] like Figures 1 to 2 As shown, this embodiment provides a high-toughness, seamless, sealing and corrosion-resistant structure, including a fiber cloth composite sealing tape 2 and a sealing wrapping tape 3. The fiber cloth composite sealing tape 2 wraps around the outer surface of a steel component (such as cable 1), sealing the steel component (such as cable 1) within the fiber cloth composite sealing tape 2. The fiber cloth composite sealing tape 2 includes a sealant 21 and a fiber mesh fabric 22. The sealant 21 is cast-in-place onto the outer surface of the steel component (such as cable 1). This casting method ensures that there are no exposed areas on the outer surface of the steel component (such as cable 1), guaranteeing airtightness and preventing air from entering. There is at least one layer of fiber mesh fabric 22, which wraps around and is composite with the sealant 21 (immersed in the sealant 21), forming a continuous, seamless sealing layer. The fiber mesh fabric 22 provides effective support for the sealant 21, improving the toughness of the sealing structure, thereby enhancing stability and improving the durability of the sealing effect. The sealing wrapping tape 3 is wrapped around the fiber cloth composite sealing tape 2 to ensure that there are no leaks or exposed areas on the fiber cloth composite sealing tape 2, further improving the sealing performance and the toughness of the sealing structure, and enhancing the service durability of the sealing structure. The combined action of the cast-in-place sealant 21 and the sealing wrapping tape 3 ensures the sealing performance of the steel component (such as cable 1). The fiber mesh fabric 22 and the sealing wrapping tape 3 also ensure the structural stability of the sealant 21, improving service durability and preventing early cracking of the sealing structure and corrosion of the steel component.

[0027] The steel components can be any steel components that require sealing and corrosion protection, such as cable 1, steel columns, and steel beams, especially cable 1. Cable 1 can be any other cable that requires sealing and corrosion protection, such as bridge cables and cable car cables, especially bridge cables.

[0028] In one embodiment, the fiber-reinforced composite sealing tape 2 is a fiber-reinforced nano flame-retardant sealing tape, the fiber mesh 22 is a high-temperature resistant inorganic fiber mesh, the sealant 21 is a nano flame-retardant sealant, and the sealing wrapping tape 3 is a fire-resistant and weather-resistant sealing wrapping tape. The combined effect of these three components enables this high-toughness seamless sealing and corrosion-resistant structure to not only provide sealing and corrosion protection but also high-temperature resistance and flame retardancy, avoiding cracking and combustion damage caused by high-temperature environments. Of course, other materials with better flame-retardant properties can also be used for the above components if alternative materials are available.

[0029] In one embodiment, the high-temperature resistant inorganic fiber mesh (fiber mesh 22) is a basalt fiber mesh. Of course, other high-temperature resistant materials can also be used for the high-temperature resistant inorganic fiber mesh (fiber mesh 22).

[0030] In one embodiment, the nano flame-retardant sealant (sealant 21) is a one-component nano flame-retardant sealant.

[0031] In one embodiment, the sealant 21 is a self-curing sealant, and the fiber cloth composite sealing tape 2 is formed by the natural curing of the sealant 21 and the fiber mesh 22. After curing, the sealant 21 forms a seamless bonding interface with the outer surface of the steel component (cable 1) and the fiber mesh 22.

[0032] In one embodiment, the fire-resistant and weather-resistant sealing wrapping tape 3 is basalt fiber cloth impregnated with ceramicized silicone rubber. The fire-resistant and weather-resistant sealing wrapping tape 3 can be prefabricated in a factory.

[0033] In one embodiment, the thickness of the fiber cloth composite sealing tape 2 is 2mm to 3mm, which can be adjusted according to the actual situation.

[0034] In one embodiment, the thickness of the sealing wrapping tape 3 is 0.8mm to 1.5mm, which can be adjusted according to the actual situation.

[0035] In one embodiment, the construction method of the high-toughness seamless sealing and anti-corrosion structure is roughly as follows: a single-component nano flame-retardant sealant (sealant 21) is poured on the outer surface of the steel component (such as cable 1). High-temperature resistant inorganic fiber mesh cloth (fiber mesh cloth 22) is wrapped around the nano flame-retardant sealant (sealant 21). After the flame-retardant sealant (sealant 21) seeps out from the mesh, the sealant is scraped evenly with a scraper. Then, the high-temperature resistant inorganic fiber mesh cloth (sealant 21) is wrapped again. After the sealant seeps out from the mesh again, it is smoothed with a scraper. There should be no gaps in the mesh cloth. After natural curing, fire-resistant and weather-resistant sealing wrapping tape (sealing wrapping tape 3) is wrapped immediately.

[0036] In one embodiment, actual tests showed that: when the thickness of the fiber cloth composite sealing tape 2 is 2mm to 3mm, the thickness of the sealing wrapping tape 3 is 0.8mm to 1.5mm, the fiber mesh 22 is a double-layer high-temperature resistant inorganic fiber mesh, the sealant 21 is a nano flame-retardant sealant, and the sealing wrapping tape 3 is a fire-resistant and weather-resistant sealing wrapping tape, the overall glass transition temperature of this high-toughness seamless sealing and anti-corrosion structure is not less than 1100℃. At 1100℃, the steel wire temperature of the steel component (such as cable 1) does not exceed 300℃ within 10 minutes; at 700℃, the steel wire temperature of the steel component (such as cable 1) does not exceed 300℃ within 30 minutes. Under different working conditions, the protective structure resists gas pressure greater than 0.3MPa, the elongation rate of the flame-retardant sealant is not less than 200%, and the sealing gas pressure difference is not less than 0.1MPa.

[0037] Example 2

[0038] like Figures 1 to 2 As shown, this embodiment provides a construction method for a high-toughness seamless sealing and anti-corrosion structure, used to form the high-toughness seamless sealing and anti-corrosion structure in Embodiment 1, including the following steps:

[0039] S1. Apply sealant 21 to the outer surface of the steel component (such as cable 1) to form an initial adhesive layer;

[0040] S2. Wrap the fiber mesh cloth 22 around the initial adhesive layer, and scrape the sealant that seeps out from the mesh of the fiber mesh cloth 22 evenly. When scraping, ensure that the fiber mesh cloth 22 is completely impregnated. Tools such as scrapers and scrapers can be used when scraping.

[0041] S3. Wrap a sealing wrapping tape 3 (at least one layer) around the outer surface of the cured fiber cloth composite sealing tape 2 to ensure that there is no leakage or exposed area.

[0042] In one embodiment, the sealant 21 is self-curing, with a curing time of ≤24h, and after curing, it forms a seamless bonding interface with the outer surface of the steel component (such as cable 1) and the fiber mesh 22.

[0043] In one embodiment, in step S4, the wrapping direction of the sealing wrapping tape 3 forms an angle α with the axial direction of the steel component (such as cable 1), where α is 45° to 60°. The wrapping is done using a splicing method, and the overlap width W of the sealing wrapping tape 3 is ≥ 50% of the tape width to ensure the sealing performance of the package. Of course, the above parameters (angle α and overlap width) can be adjusted as needed and do not necessarily require the specific parameters described above.

[0044] In one embodiment, the fiber mesh 22 is a high-temperature resistant inorganic fiber mesh, the sealant 21 is a nano flame-retardant sealant, and the sealing wrapping tape 3 is a fire-resistant and weather-resistant sealing wrapping tape. The combined effect of these three components enables the high-toughness seamless sealing and anti-corrosion structure to not only have a sealing and anti-corrosion function, but also to have high-temperature resistance and flame-retardant functions, thus avoiding cracking and combustion damage caused by high-temperature environments.

[0045] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A high-toughness, seamless, sealing, and corrosion-resistant structure, characterized in that, It includes a fiber cloth composite sealing tape wrapped around the outer surface of a steel component and a sealing wrapping tape wrapped around the fiber cloth composite sealing tape. The fiber cloth composite sealing tape includes a sealant cast on the outer surface of the steel component and at least one layer of fiber mesh cloth wrapped around the sealant and impregnated in the sealant.

2. The high-toughness seamless sealing and corrosion-resistant structure according to claim 1, characterized in that, The fiber cloth composite sealing tape is a fiber-reinforced nano flame-retardant sealing tape, the fiber mesh cloth is a high-temperature resistant inorganic fiber mesh cloth, the sealant is a nano flame-retardant sealant, and the sealing wrapping tape is a fire-resistant and weather-resistant sealing wrapping tape.

3. The high-toughness seamless sealing and corrosion-resistant structure according to claim 2, characterized in that, The nano flame-retardant sealant is a single-component nano flame-retardant sealant.

4. The high-toughness seamless sealing and corrosion-resistant structure according to claim 2, characterized in that, The high-temperature resistant inorganic fiber mesh is a basalt fiber mesh.

5. The high-toughness seamless sealing and corrosion-resistant structure according to claim 2, characterized in that, The fire-resistant and weather-resistant sealing wrapping tape is basalt fiber cloth impregnated with ceramicized silicone rubber.

6. The high-toughness seamless sealing and corrosion-resistant structure according to any one of claims 2-5, characterized in that, The thickness of the fiber-reinforced nano flame-retardant sealing tape is 2mm~3mm, and the thickness of the fire-resistant and weather-resistant sealing wrapping tape is 0.8mm~1.5mm.

7. The high-toughness seamless sealing and corrosion-resistant structure according to claim 1, characterized in that, The sealant is self-curing and, after curing, forms a seamless bonding interface with the outer surface of the steel component and the fiber mesh.

8. The high-toughness seamless sealing and corrosion-resistant structure according to claim 7, characterized in that, The wrapping direction of the sealing tape is at an angle of 45° to 60° to the axial direction of the steel component, and the tape is wrapped in a splicing manner.

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