Bridge main cable fireproof coating structure, bridge main cable, and manufacturing method of bridge main cable

Abstract

The present application discloses a fireproof coating structure for a bridge main cable, a bridge main cable and a method for manufacturing a bridge main cable. The fireproof coating structure for a bridge main cable is applied to the surface of the cable, and includes a primer layer, a sealing layer, an aerogel fireproof composite layer and a silicon inorganic material composite coating. The primer layer, the sealing layer, the aerogel fireproof composite layer and the silicon inorganic material composite coating are arranged in sequence from the inside to the outside, and the primer layer is configured to be arranged on the surface of the cable. The technical solution provided by the present application can solve the problem that the cable has poor fireproof performance and does not prevent icing in the prior art.

Description

Technical Field

[0001] The present application relates to the technical field of bridge main cables, and in particular, to a fireproof coating structure for bridge main cables, a bridge main cable, and a manufacturing method of a bridge main cable. Background Art

[0002] Bridge cables are key structural components of bridges, and their reliability, durability, and adaptability are related to the safety and normal use of bridge structures. Bridges are often in environments such as rivers, lakes, and seas. In addition to being affected by moisture corrosion, wind erosion, stress corrosion, etc., at present, anticorrosive putty materials, external heat extrusion PE layer protection systems for galvanized steel wires, chlorosulfonated polyethylene (CSM) wrapping tapes, double-layer high-density polyethylene and other materials are mostly used in China. Such materials have good anticorrosive performance but general fireproof performance. In case of a bridge fire caused by a major traffic accident, there are serious safety hazards. When the temperature of the steel wires reaches above 400°C due to a bridge fire, the elastic modulus of the steel wires will change accordingly, resulting in a significant reduction in the bearing capacity and service life of the bridge, and even the collapse of the bridge body and serious accidents. Therefore, it is necessary to protect the cables against durability and fireproof performance. Some bridge cable fireproof solutions use fireproof materials to wrap them. This method is complex for high-altitude operations and significantly increases the weight of the cables. Bridge cables are located above the bridge deck. When the temperature is low in winter and there is rain or snow, the cable surface may freeze and form ice lumps, which pose a serious threat to the safety of pedestrians, vehicles on the bridge deck, and nearby residents after melting and falling. Summary of the Invention

[0003] The present application provides a fireproof coating structure for bridge main cables, a bridge main cable, and a manufacturing method of a bridge main cable, which can solve the problems of poor fireproof performance and non-prevention of icing of cables in the prior art.

[0004] In a first aspect, the present invention provides a fireproof coating structure for bridge main cables, which is applied to the surface of the cable and includes a primer layer, a sealing layer, an aerogel fireproof composite layer, and a silicon-based inorganic material composite coating;

[0005] The primer layer, the sealing layer, the aerogel fireproof composite layer, and the silicon-based inorganic material composite coating are sequentially arranged in the order from the inside to the outside, and the primer layer is configured to be disposed on the surface of the cable.

[0006] In the above implementation process, before setting the fireproof coating structure of the main cable of the bridge on the surface of the cable, the surface of the cable can be cleaned to remove oil stains and dust on its surface. The primer layer is set on the surface of the cable. One of the purposes of the primer layer is to improve adhesion. A sealing layer is set on the surface of the primer layer to seal and protect the primer layer and the cable, preventing water vapor from penetrating. An aerogel fireproof composite layer is set on the surface of the sealing layer. The aerogel fireproof composite layer contains aerogel material, which has a low thermal conductivity, strong adhesion, and the characteristics of being light in weight and having good heat insulation effect. A silicon-based inorganic material composite coating is set on the surface of the aerogel fireproof composite layer. The silicon-based inorganic material composite coating contains silicon-based inorganic material, so it has the characteristics of fireproofing, fire retardancy, anti-corrosion, and anti-pollution. The fireproof coating structure of the main cable of the bridge has the characteristics of anti-corrosion, fireproofing, anti-pollution, good impact resistance, prominent protection effect, etc., and at the same time has the advantage of anti-icing. When applied to the surface of the cable, it effectively improves the physical properties of the cable and at the same time effectively improves the appearance neatness of the cable.

[0007] In an alternative embodiment, the aerogel fireproof composite layer includes an aerogel fireproof composite coating, and the aerogel fireproof composite coating includes aerogel powder and an inorganic binder.

[0008] In the above implementation process, from the nano-porous structure of SiO 2 The aerogel powder and the inorganic binder are jointly used to prepare the aerogel fireproof coating, which is in paste form and can be applied to the sealing layer by scraping or spraying to form a fireproof composite coating with uniform texture and remarkable fireproof effect. At the same time, due to the action of the inorganic binder, the integrity of the aerogel fireproof composite layer can be effectively guaranteed; at the same time, as a coating structure, the aerogel fireproof composite layer is light in weight itself, avoiding the main cable structure of the bridge from bearing a large self-weight.

[0009] In an alternative embodiment, the thickness of the aerogel fireproof composite layer is 5000μm - 20000μm.

[0010] In the above implementation process, the thickness of the aerogel fireproof composite layer can be controlled between 5000μm and 20000μm. When the thickness of the aerogel fireproof composite layer is 5000μm, it can withstand fire for half an hour and has a moderate thickness, which is conducive to the control of the overall size of the cable. When the thickness of the aerogel fireproof composite layer is 20000μm, the fireproof coating structure of the main cable of the bridge has a significant fireproof effect and can withstand fire for two hours. The manufacturing unit can scrape or spray an aerogel fireproof composite layer with an appropriate thickness according to the design requirements.

[0011] In an alternative embodiment, the aerogel fireproof composite layer includes a high-temperature resistant silicone sealant, an aerogel felt, and an aluminum foil tape;

[0012] The aerogel felt is connected to the sealing layer through the high-temperature resistant silicone sealant, and the aluminum foil tape is wound and wrapped on the surface of the aerogel felt.

[0013] In the above implementation process, a high-temperature resistant silicone sealant is coated on the inner side of the aerogel felt, and the aerogel felt board is bonded to the sealing layer in an S-shaped winding manner. Subsequently, an aluminum foil tape is wound and wrapped around the outer side of the aerogel felt, so that the aerogel felt is reliably wrapped and its shape is basically smooth, facilitating the setting of the silicon-based inorganic material composite coating. The aerogel felt can withstand high temperatures of 450°C to 750°C, and its thermal conductivity ≤ 0.019 W / m·K (25°C). It can effectively prevent heat from being conducted to the sealing layer, primer layer, and cable, ensuring the heat resistance of the fireproof coating structure of the main cable of the bridge, and effectively improving the heat resistance and service life of the cable.

[0014] In an alternative embodiment, the silicon-based inorganic material composite coating includes an acrylic polyurethane coating and a silicon-based inorganic material coating;

[0015] The acrylic polyurethane coating is provided on the surface of the aerogel fireproof composite layer, and the silicon-based inorganic material coating is provided on the surface of the acrylic polyurethane coating.

[0016] In the above implementation process, when setting the silicon-based inorganic material composite coating, acrylic polyurethane of an appropriate color can be configured and coated on the aerogel fireproof composite layer. After the acrylic polyurethane stabilizes, an acrylic polyurethane coating is formed, and a silicon-based inorganic material is coated thereon to form a silicon-based inorganic material coating. The silicon-based inorganic material coating is a transparent pure ceramic coating. Under the condition that the silicon-based inorganic material composite coating has the characteristics of fireproofing, flame retardancy, anti-corrosion, and anti-pollution, various colors of acrylic polyurethane can be formulated, and its color can be displayed outward through the transparent pure ceramic coating. Its color is bright and lasting, and its appearance is beautiful, which is conducive to the cable being coordinated with the surrounding landscape; at the same time, it should be noted that the silicon-based inorganic material coating can be antibacterial and mildew-proof, prevent water droplets from hanging, resist the damage of external natural effects, seal the emission of harmful substances, and protect the performance stability of the primer layer, sealing layer, and aerogel fireproof composite layer. At the same time, the silicon-based inorganic material coating has a hydrophobic property, which can effectively prevent water droplets from hanging and freezing.

[0017] In an alternative embodiment, the thickness of the silicon-based inorganic material coating is 15μm - 30μm.

[0018] In the above implementation process, the thickness of the silicon-based inorganic material coating can be controlled between 15μm and 30μm. The specific thickness value of the silicon-based inorganic material coating mainly depends on the severity of the external corrosion environment. Exemplarily, in a general environment, the thickness of the silicon-based inorganic material coating can be 15μm, and in a marine environment, it can be adjusted to 30μm.

[0019] In an alternative embodiment, the primer layer includes a phosphating primer layer and an epoxy resin primer layer;

[0020] The phosphating primer layer is configured to be provided on the surface of the cable, and the epoxy resin primer layer is provided on the surface of the phosphating primer layer.

[0021] In the above implementation process, a phosphating primer layer is sprayed on the surface of the cable, with a thickness of about 10 μm and uniform coloring. While the phosphating primer layer provides anti-corrosion effect, it can also increase the adhesion of subsequent coatings. The epoxy primer, epoxy curing agent and diluent are mixed evenly according to a volume ratio of 5:1:1 and sprayed on the phosphating primer layer to form an epoxy resin primer layer, which has the effects of chemical resistance, anti-corrosion and water resistance, and has good thermal stability.

[0022] In an alternative embodiment, the sealing layer includes a vulcanized rubber sealing layer.

[0023] In the above implementation process, the vulcanized rubber sealant is coated on the sealing layer to form a vulcanized rubber sealing layer. The vulcanized rubber sealing layer can seal and protect the primer layer, form the expected shape, has the advantage of good adhesion, and has the characteristics of water and solvent resistance.

[0024] In a second aspect, the present invention provides a bridge main cable, including a cable and the bridge main cable fireproof coating structure according to any one of the foregoing embodiments;

[0025] The bridge main cable fireproof coating structure is provided on the surface of the cable.

[0026] In the above implementation process, due to the bridge main cable fireproof coating structure, the bridge main cable has the advantages of anti-corrosion, anti-pollution, heat insulation, fire resistance, light weight, good durability, beautiful appearance and anti-icing, effectively improving the reliability and durability of the bridge main cable.

[0027] In a third aspect, the present invention provides a manufacturing method of a bridge main cable for manufacturing the bridge main cable according to the foregoing embodiments. The method includes the following steps:

[0028] Surface treatment: cleaning the surface of the cable to remove oil stains and dust on the surface of the cable;

[0029] Primer treatment: setting a primer layer on the surface of the cable;

[0030] Sealing treatment: setting a sealing layer on the surface of the primer layer;

[0031] Fireproof treatment: setting an aerogel fireproof composite layer on the surface of the sealing layer; and

[0032] Appearance treatment: setting a silicon-based inorganic material composite coating on the surface of the aerogel fireproof composite layer. Description of the Drawings

[0033] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0034] Figure 1 It is a schematic diagram of the fireproof coating structure of the main cable of the bridge in this embodiment;

[0035] Figure 2 It is a schematic diagram of another aerogel fireproof composite layer provided in this embodiment;

[0036] Figure 3 It is a schematic diagram of the main cable of the bridge in this embodiment;

[0037] Figure 4 It is a flowchart of the manufacturing method of the main cable of the bridge in this embodiment.

[0038] Icon: 10 - primer layer; 20 - sealing layer; 30 - aerogel fireproof composite layer; 31 - high-temperature resistant silicone sealant; 32 - aerogel felt; 33 - aluminum foil tape; 40 - silicon-based inorganic material composite coating; 50 - cable. Detailed implementation manners

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application to be protected, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0041] It should be noted that: Similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0042] In the description of the embodiments of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the products of this application are customarily placed during use, or the orientation or positional relationships commonly understood by those skilled in the art. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0043] In the description of the embodiments of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0044] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0045] Next, the technical solutions in the present application will be described with reference to the drawings.

[0046] This embodiment provides a fireproof coating structure for the main cable of a bridge, which can solve the problems of poor fireproof performance and non-icing prevention of the cable in the prior art.

[0047] Please refer to Figure 1 , Figure 1 , which is a schematic diagram of the fireproof coating structure for the main cable of the bridge in this embodiment.

[0048] In this embodiment, the fireproof coating structure for the main cable of the bridge is exemplarily applied to the surface of the cable 50, but in other specific embodiments, the application scenarios of the fireproof coating structure for the main cable of the bridge are not limited.

[0049] The fireproof coating structure for the main cable of the bridge includes a primer layer 10, a sealing layer 20, an aerogel fireproof composite layer 30, and a silicon-based inorganic material composite coating 40.

[0050] The primer layer 10, the sealing layer 20, the aerogel fireproof composite layer 30, and the silicon-based inorganic material composite coating 40 are sequentially arranged in the order from the inside to the outside. The primer layer 10 is configured to be disposed on the surface of the cable 50 (see Figure 3 ).

[0051] In the above implementation process, before setting the bridge main cable fireproof coating structure on the surface of the cable 50, the surface of the cable 50 can be cleaned to remove the oil stains and dust on its surface. The primer layer 10 is set on the surface of the cable 50. One of the purposes of the primer layer 10 is to improve the adhesion. The sealing layer 20 is set on the surface of the primer layer 10 to seal and protect the primer layer 10 and the cable 50 to prevent water vapor from penetrating. The aerogel fireproof composite layer 30 is set on the surface of the sealing layer 20. The aerogel fireproof composite layer 30 contains aerogel material, which has a low thermal conductivity, strong adhesion, and is characterized by light weight and good heat insulation effect. The silicon-based inorganic material composite coating 40 is set on the surface of the aerogel fireproof composite layer 30. The silicon-based inorganic material composite coating 40 contains silicon-based inorganic material, so it has the characteristics of fireproofing, fire retardancy, anti-corrosion, and anti-pollution. The bridge main cable fireproof coating structure has the characteristics of anti-corrosion, fireproofing, anti-pollution, good impact resistance, outstanding protection effect, etc., and at the same time has the advantage of anti-icing. When applied to the surface of the cable 50, it effectively improves the physical properties of the cable and at the same time effectively improves the appearance cleanliness of the cable 50.

[0052] In the present disclosure, the aerogel fireproof composite layer 30 includes an aerogel fireproof composite coating, and the aerogel fireproof composite coating includes aerogel powder and an inorganic binder.

[0053] The aerogel fireproof coating is made of SiO with a nano-porous structure 2 The aerogel powder and the inorganic binder are jointly prepared. The aerogel fireproof coating is in paste form and can be applied to the sealing layer 20 by scraping or spraying to form a fireproof composite coating with uniform texture and remarkable fireproof effect. At the same time, due to the action of the inorganic binder, the integrity of the aerogel fireproof composite layer 30 can be effectively ensured; at the same time, as a coating structure, the aerogel fireproof composite layer 30 itself is light in weight, avoiding the bridge main cable structure from bearing a large self-weight.

[0054] In the present disclosure, the thickness of the aerogel fireproof composite layer 30 is 5000μm - 20000μm.

[0055] In the above implementation process, the thickness of the aerogel fireproof composite layer 30 can be controlled between 5000μm - 20000μm, and its values can be 5000μm, 6000μm, 7000μm, 12000μm, 15000μm, 19000μm or 2000μm, etc. When the thickness of the aerogel fireproof composite layer 30 is 5000μm, it can withstand fire for half an hour and has a moderate thickness, which is beneficial to the control of the overall size of the cable 50. When the thickness of the aerogel fireproof composite layer 30 is 20000μm, the bridge main cable fireproof coating structure has a remarkable fireproof effect and can withstand fire for two hours. The manufacturing unit can scrape or spray an aerogel fireproof composite layer 30 with an appropriate thickness according to the design requirements.

[0056] In the present disclosure, the silicon-based inorganic material composite coating 40 includes an acrylic polyurethane coating and a silicon-based inorganic material coating. The acrylic polyurethane coating is disposed on the surface of the aerogel fireproof composite layer 30, and the silicon-based inorganic material coating is disposed on the surface of the acrylic polyurethane coating.

[0057] In the above implementation process, when setting the silicon-based inorganic material composite coating 40, acrylic polyurethane of an appropriate color can be configured and coated on the aerogel fireproof composite layer 30. After the acrylic polyurethane stabilizes, an acrylic polyurethane coating is formed, and a silicon-based inorganic material is coated thereon to form a silicon-based inorganic material coating. The silicon-based inorganic material coating is a transparent pure ceramic coating. Under the condition that the silicon-based inorganic material composite coating 40 has the characteristics of fire prevention, flame retardancy, anti-corrosion, and anti-pollution, various colors of acrylic polyurethane can be formulated and its color can be displayed outward through the transparent pure ceramic coating. Its color is bright and long-lasting, and its appearance is beautiful, which is conducive to the cable 50 being coordinated with the surrounding landscape; at the same time, it should be noted that the silicon-based inorganic material coating can be antibacterial and mildew-proof, prevent water droplets from hanging, resist external natural damage, seal the emission of harmful substances, and protect the performance stability of the primer layer 10, the sealing layer 20, and the aerogel fireproof composite layer 30. At the same time, the silicon-based inorganic material coating has a hydrophobic property, which can effectively prevent water droplets from hanging and freezing.

[0058] In the present disclosure, the thickness of the silicon-based inorganic material coating is 15 μm - 30 μm.

[0059] In the above implementation process, the thickness of the silicon-based inorganic material coating can be controlled between 15 μm and 30 μm. The specific thickness value of the silicon-based inorganic material coating mainly depends on the severity of the external corrosion environment. Exemplarily, in a general environment, the thickness of the silicon-based inorganic material coating can be 15 μm, and in a marine environment, it can be adjusted to 30 μm.

[0060] In the present disclosure, the primer layer 10 includes a phosphating primer layer 10 and an epoxy resin primer layer 10. The phosphating primer layer 10 is configured to be disposed on the surface of the cable 50, and the epoxy resin primer layer 10 is disposed on the surface of the phosphating primer layer 10.

[0061] In the above implementation process, the phosphating primer layer 10 is sprayed on the surface of the cable 50, and its thickness can be about 10 μm and evenly colored. The phosphating primer layer 10 can not only achieve an anti-corrosion effect but also increase the adhesion of subsequent coatings; the epoxy primer, epoxy curing agent, and diluent are mixed evenly according to a volume ratio of 5:1:1 and sprayed on the phosphating primer layer 10 to form an epoxy resin primer layer 10, which has the effects of chemical resistance, anti-corrosion, water resistance, and good thermal stability.

[0062] In the present disclosure, the sealing layer 20 includes a vulcanized rubber sealing layer 20.

[0063] In the above implementation process, the vulcanized rubber sealant is coated on the sealing layer 20 to form a vulcanized rubber sealing layer 20. The vulcanized rubber sealing layer 20 can enclose and protect the primer layer 10, form an expected shape, has the advantages of good adhesiveness, and has the characteristics of water and solvent resistance.

[0064] It should be noted that in this embodiment, another aerogel fireproof composite layer 30 is also provided, and the bridge main cable fireproof coating structure described above can adopt this aerogel fireproof composite layer 30.

[0065] Please refer to Figure 2 , Figure 2 which is a schematic diagram of another aerogel fireproof composite layer 30 provided in this embodiment. In Figure 2 , the aerogel fireproof composite layer 30 includes a high-temperature resistant silicone sealant 31, an aerogel felt 32, and an aluminum foil tape 33. The aerogel felt 32 is connected to the sealing layer 20 through the high-temperature resistant silicone sealant 31, and the aluminum foil tape 33 is wound and wrapped on the surface of the aerogel felt 32.

[0066] In the above implementation process, the high-temperature resistant silicone sealant 31 is coated on the inner side of the aerogel felt 32, and the aerogel felt 32 is bonded to the sealing layer 20 in an S-shaped winding manner. Subsequently, the aluminum foil tape 33 is wound and wrapped on the outer side of the aerogel felt 32, so that the aerogel felt 32 is reliably wrapped and the outer shape is basically smooth, facilitating the setting of the silicon-based inorganic material composite coating 40. The aerogel felt 32 can withstand high temperatures of 450°C to 750°C, and the thermal conductivity ≤ 0.019 W / m·K (25°C). It can effectively prevent heat from being conducted to the sealing layer 20, the primer layer 10, and the cable 50, ensure the heat resistance of the bridge main cable fireproof coating structure, and effectively improve the heat resistance and service life of the cable 50.

[0067] It should be noted that the present disclosure also provides a bridge main cable. Please refer to Figure 3 , Figure 3 which is a schematic diagram of the bridge main cable in this embodiment.

[0068] The bridge main cable includes a cable 50 and the bridge main cable fireproof coating structure described above. The bridge main cable fireproof coating structure is provided on the surface of the cable 50.

[0069] In the above implementation process, due to the bridge main cable fireproof coating structure, the bridge main cable has the advantages of anti-corrosion, anti-pollution, heat insulation, fire resistance, light weight, good durability, beautiful appearance, and anti-icing, effectively improving the reliability and durability of the bridge main cable.

[0070] It should be noted that this embodiment also provides a manufacturing method for a bridge main cable.

[0071] This method is used to manufacture the above-mentioned bridge main cable. Please refer to Figure 4 , Figure 4The flowchart of the manufacturing method of the main cable of the bridge in this embodiment, the method includes the following steps:

[0072] Surface treatment, cleaning the surface of the cable 50 to remove oil stains and dust on the surface of the cable 50;

[0073] Primer treatment, setting a primer layer 10 on the surface of the cable 50;

[0074] Sealing treatment, setting a sealing layer 20 on the surface of the primer layer 10;

[0075] Fireproof treatment, setting an aerogel fireproof composite layer 30 on the surface of the sealing layer 20; and

[0076] Appearance treatment, setting a silicon-based inorganic material composite coating 40 on the surface of the aerogel fireproof composite layer 30.

[0077] The manufacturing method of the main cable of the bridge will be described in detail below:

[0078] In the surface treatment step, the surface of the cable 50 is cleaned to remove surface oil stains and dust. If there are oil stains on the construction surface, corresponding reagents need to be used for thorough cleaning.

[0079] In the primer treatment step, an appropriate type of primer is selected and sprayed on the surface of the cable 50 to form a primer layer 10. Exemplarily, a phosphating primer and an epoxy resin primer can be used together to form the primer layer 10 to achieve the purposes of chemical resistance, corrosion resistance, water resistance and thermal stability, and increase the adhesion of subsequent coatings.

[0080] In the sealing treatment step, a sealant is coated on the primer layer 10 to form a sealing layer 20. Exemplarily, a vulcanized rubber sealant can be selected, with an average thickness of 3000μm and shaped to a smooth outer surface. The sealing layer 20 can seal and protect the primer layer 10 and the cable 50 to prevent water vapor from infiltrating.

[0081] In the fireproof treatment step, an aerogel fireproof composite layer 30 is set on the surface of the sealing layer 20. For this purpose, this embodiment exemplarily provides two types of aerogel fireproof composite layers 30 and their setting methods:

[0082] One is that aerogel fireproof composite coating is prepared from SiO with nano-porous structure 2 aerogel powder and inorganic binder. The aerogel fireproof composite coating is applied on the sealing layer 20 by scraping or spraying to form a fireproof composite coating with a thickness of 5000μm - 20000μm;

[0083] Second, the aerogel fireproof composite layer 30 includes a high-temperature resistant silicone sealant 31, an aerogel felt 32, and an aluminum foil tape 33. The high-temperature resistant silicone sealant 31 is coated on the inner side of the aerogel felt 32. The aerogel felt 32 is bonded to the sealing layer 20 in an S-shaped winding manner. Subsequently, the aluminum foil tape 33 is wound and wrapped around the outside of the aerogel felt 32, so that the aerogel felt 32 is reliably wrapped and the outer shape is basically smooth, facilitating the setting of the silicon-based inorganic material composite coating 40.

[0084] In the appearance treatment step, acrylic polyurethane of an appropriate color can be configured and coated on the aerogel fireproof composite layer 30. After the acrylic polyurethane is stabilized, an acrylic polyurethane coating is formed. A silicon-based inorganic material is coated thereon to form a silicon-based inorganic material coating. The silicon-based inorganic material coating is a transparent pure ceramic coating with a thickness of 15 - 30 μm. The acrylic polyurethane and the silicon-based inorganic material together constitute an inorganic material composite coating. This coating is hydrophobic and antifreeze, resists damage from external natural effects, seals the emission of harmful substances, and protects the performance of the following coatings to be stable. At the same time, it is aging-resistant, has a bright and lasting color, and has a beautiful appearance.

[0085] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A fireproof coating structure for the main cable of a bridge, which is applied to the surface of the cable. Characterized in that, It includes a primer layer, a sealing layer, an aerogel fireproof composite layer and a silicon-based inorganic material composite coating; The primer layer, the sealing layer, the aerogel fireproof composite layer and the silicon-based inorganic material composite coating are sequentially arranged in the order from the inside to the outside, and the primer layer is configured to be arranged on the surface of the cable; The aerogel fireproof composite layer includes a high-temperature resistant silicone sealant, an aerogel felt and an aluminum foil tape; The aerogel felt is connected to the sealing layer through the high-temperature resistant silicone sealant, and the aerogel felt is bonded to the sealing layer in an S-shaped winding manner, and the aluminum foil tape is wound around the surface of the aerogel felt; The silicon-based inorganic material composite coating includes an acrylic polyurethane coating and a silicon-based inorganic material coating; the acrylic polyurethane coating is arranged on the surface of the aerogel fireproof composite layer, and the silicon-based inorganic material coating is arranged on the surface of the acrylic polyurethane coating, and the silicon-based inorganic material coating is a transparent pure ceramic coating.

2. The fireproof coating structure for the main cable of a bridge according to claim 1, Characterized in that, The aerogel fireproof composite layer includes an aerogel fireproof composite coating, and the aerogel fireproof composite coating includes aerogel powder and an inorganic binder.

3. The fireproof coating structure for the main cable of a bridge according to claim 2, Characterized in that, The thickness of the aerogel fireproof composite layer is 5000 μm - 20000 μm.

4. The fireproof coating structure for the main cable of a bridge according to claim 1, Characterized in that, The thickness of the silicon-based inorganic material coating is 15μm - 30μm.

5. The fireproof coating structure for the main cable of a bridge according to claim 1, Characterized in that, The primer layer includes a phosphating primer layer and an epoxy resin primer layer; The phosphating primer layer is configured to be arranged on the surface of the cable, and the epoxy resin primer layer is arranged on the surface of the phosphating primer layer.

6. The fireproof coating structure for the main cable of a bridge according to claim 1, Characterized in that, The sealing layer includes a vulcanized rubber sealing layer.

7. A main cable of a bridge, Characterized in that, It includes a cable and the fireproof coating structure for the main cable of a bridge according to any one of claims 1 - 6; The fireproof coating structure for the main cable of a bridge is arranged on the surface of the cable.

8. A manufacturing method for the main cable of a bridge, Characterized in that, The method is used to manufacture the main cable of a bridge according to claim 7, and the method includes the following steps: Surface treatment, cleaning the surface of the cable to remove the oil stains and dust on the surface of the cable; Primer treatment, arranging the primer layer on the surface of the cable; Sealing treatment, arranging the sealing layer on the surface of the primer layer; Fireproof treatment, arranging the aerogel fireproof composite layer on the surface of the sealing layer; and Appearance treatment, arranging the silicon-based inorganic material composite coating on the surface of the aerogel fireproof composite layer.

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