Suspension bridge main cable fireproof structure convenient to construct

Abstract

The invention provides a suspension bridge main cable fireproof structure convenient to construct, belongs to the technical field of suspension bridge main cable protection, and is used for wrapping the outer side of a main cable of a suspension bridge. Comprising a fireproof combined layer and a buffer sealing combined layer, the fireproof combined layer comprises an outer fireproof cloth layer, an inner fireproof cloth layer and a fireproof filler layer, the fireproof filler layer is wrapped by the outer fireproof cloth layer and the inner fireproof cloth layer, and the fireproof filler layer is of a flexible layered structure formed by mixing various fireproof heat insulation powder; the buffering and sealing combined layer comprises a rubber layer and a sealing rubber layer which are sequentially compounded on the outer surface of the inner fireproof cloth layer; the sealing glue layer is attached to the outer surface of the main cable and wraps the main cable, so that the outer fireproof cloth layer is exposed. The fireproof function and the buffer sealing function are integrated, an integrated main cable fireproof outer layer wrapping structure is formed, the problems that in a traditional layered wrapping mode, installation of all layers of materials is complex, alignment is difficult and the like are solved, the construction efficiency is greatly improved, and the construction process is simplified.

Description

Technical Field

[0001] The present invention belongs to the technical field of main cable protection for suspension bridges, and in particular relates to a fire protection structure for main cables of suspension bridges that is convenient to construct. Background Art

[0002] As a key cable-supported bridge structure, suspension bridges rely on their main cables, a critical load-bearing component that cannot be replaced. Main cables typically consist of multiple bundles of high-strength steel wires, which are highly sensitive to high temperatures. The fire resistance of main cables is crucial for the safe operation of suspension bridges. In the event of a vehicle-induced fire, fire protection of the main cables can effectively prevent damage to the steel wires caused by high temperatures, ensuring the stability of the bridge structure. However, existing fire protection measures for suspension bridge main cables have numerous shortcomings in terms of ease of installation, sealing durability, and material physical properties.

[0003] In existing technologies, aerogel fiber felt is mainly used in main cable fire protection design. However, through a large number of real fire tests, it has been found that when aerogel fiber felt is used as the main cable fire protection material, the single-layer structure is prone to local damage during a fire, affecting the fire protection stability. Therefore, the current suspension bridge main cable fire protection generally adopts the following two forms: one is a double-layer aerogel fiber felt coating structure; the other is a double-layer aerogel fiber felt spirally wound structure, both of which have certain limitations: Double-layer aerogel fiber mats are typically fastened with cable ties or wire. Because the surface of the aerogel fiber mats is covered with silica powder and has extremely low surface energy, vibrations in the main cables caused by vehicle loads or wind can cause interlayer slippage during bridge service. This slippage not only causes wrinkles in the outer sealing layer, severely affecting the appearance, but can also weaken the stability of the fire protection system.

[0004] Double-layer aerogel fiber mat spirally wound structures also require fastening with cable ties or wire during construction. If an overlapping method is used during the winding process, the overlap can be misaligned by up to 5 mm, affecting the appearance of the outer sealing solution. Therefore, a butt-jointed method is generally used, but this can be difficult to achieve a particularly dense joint gap, resulting in low construction efficiency. In the event of a fire, high temperatures could enter the main cable wires through these gaps, increasing the risk of damage to the main cable.

[0005] In summary, the existing main cable fire protection design has the following major problems: 1. Inconvenient Installation: Existing main cable fire protection materials are mostly double-layer wrapped structures, which require installation layer by layer during construction. This is cumbersome and inefficient. For example, both the double-layer aerogel fiber felt coating and the spiral winding structure require the use of cable ties or wire for fastening. Furthermore, the layers must be precisely aligned during installation, which not only increases the construction difficulty but also easily leads to material damage or loose installation due to improper operation.

[0006] 2. Poor Sealing: Existing fireproofing materials lack sufficient sealing, allowing corrosive media like air and water vapor to enter, reducing the thermal insulation properties of the fireproofing materials. This problem is exacerbated by aging and damage to the sealing materials over long periods of use, rendering the main cable ineffectively protected in the event of a fire. The joints between the spirally wound double-layer aerogel fiber mats are difficult to completely seal, further impacting their sealing performance.

[0007] 3. Limitations of material performance: Although aerogel materials have excellent thermal insulation properties, they are relatively brittle. Most fire protection systems for main cables of suspension bridges still require a protective layer of wrapping tape on the outer layer. During the construction of the wrapping tape protection, continuous external force extrusion and rolling will be used, which will directly cause the aerogel fiber felt to be flattened and partially cracked, reducing the fire resistance of the aerogel fiber felt.

[0008] Therefore, based on the existing technology, through structural optimization and material innovation, an integrated main cable fireproof outer wrapping structure that is easy to construct and has good sealing performance is proposed, providing a new solution for the fire protection of suspension bridge main cables, which has important practical application value and broad application prospects. Summary of the Invention

[0009] In response to the above technical problems, the present invention proposes a fire protection structure for the main cable of a suspension bridge that is easy to construct.

[0010] To achieve the above object, the present invention provides the following technical solutions: One of the purposes of the present invention is to provide a fireproof structure for main cables of a suspension bridge that is convenient to construct and is used to wrap around the outside of the main cables of the suspension bridge; the structure comprises: a fireproof composite layer and a buffer sealing composite layer; The fireproof composite layer includes: an outer fireproof cloth layer, an inner fireproof cloth layer and a fireproof filler layer, wherein the outer fireproof cloth layer and the inner fireproof cloth layer wrap the fireproof filler layer inside, and the fireproof filler layer is a flexible layered structure formed by mixing multiple fireproof powders; The buffer sealing composite layer includes a rubber layer and a sealant layer which are sequentially compounded on the outer surface of the inner fireproof cloth layer; the sealant layer is adhered to the outer surface of the main cable and wrapped around it, so that the outer fireproof cloth layer is exposed.

[0011] Through the above technical solution, the present invention integrates the fire protection function and the buffer sealing function into one, forming an integrated main cable fire protection outer layer wrapping structure, avoiding the problems of complex installation and difficult alignment between layers of materials in the traditional layered wrapping method, greatly improving construction efficiency and simplifying the construction process.

[0012] The fireproof composite layer consists of an outer fireproof cloth layer, an inner fireproof cloth layer and a fireproof filler layer. The fireproof filler layer is a flexible layered structure formed by a mixture of various fireproof powders. This structure can effectively block heat transfer and improve the fireproof ability of the main cable. Even in extreme situations such as fire, it can better protect the steel wire inside the main cable, prevent it from losing strength due to high temperature, and ensure the stability of the bridge structure.

[0013] The buffer sealing composite layer includes a rubber layer and a sealant layer. The sealant layer is wrapped around the outer surface of the main cable, leaving the outer fireproof cloth layer exposed. This design can effectively prevent air from entering and avoid the degradation of the thermal insulation performance of the fireproof material due to air flow, thereby improving the sealing of the overall structure and enhancing the durability of the fireproof effect.

[0014] Furthermore, the outer surfaces of the outer fireproof cloth layer and the inner fireproof cloth layer are processed with sewing threads, the sewing threads are staggered to form a plurality of cells, and the fireproof filler layer is divided and confined within the cells by the sewing threads.

[0015] The beneficial effects are: Enhanced structural stability: This structure is similar to a "lattice-like" reinforcement method, which can effectively prevent the fireproof filler layer from shifting or agglomerating during use, ensuring the stability of the fireproof composite layer so that when subjected to external forces, each part can be evenly stressed, avoiding local damage and extending its service life.

[0016] Improved fire protection uniformity: The sewing threads divide and confine the fireproof filler layer within the cells, making the distribution of the fireproof filler more uniform, thus ensuring uniform fire protection performance. In the event of a fire, the entire fireproof combination layer can more evenly exert its fire protection effect, avoiding inconsistent fire protection effects caused by localized or sparse fireproof filler, further improving the fire safety of the main cable.

[0017] Furthermore, the outer fireproof cloth layer and the inner fireproof cloth layer are any one of quartz cloth and high silica cloth; The fireproof filler layer is a mixture of one or more of silica aerogel, carbon aerogel and alumina aerogel; The rubber layer is made of silicone rubber; The sealant layer is butyl rubber.

[0018] The beneficial effects are: Improved fire resistance: The outer and inner fireproofing layers can be made of either quartz or high-silica fabric. These materials offer excellent fire resistance and can meet fire protection requirements at different temperature levels. Proper selection and matching effectively enhances the fire resistance of the entire fireproofing layer, making it more resistant to extreme situations like fire.

[0019] Optimized thermal insulation: The fireproof filler layer utilizes aerogel, a material with extremely low thermal conductivity and excellent thermal insulation properties. Using aerogel as the primary component of the fireproof filler layer effectively blocks heat transfer, further enhancing the thermal insulation performance of the main cable's fireproof outer wrapping, and providing more reliable fire protection for the bridge's main cables.

[0020] Enhanced Flexibility and Durability: The rubber layer is made of silicone rubber, which has excellent flexibility, weather resistance, and aging resistance, and can maintain stable performance under different environmental conditions. The rubber layer in the buffer seal layer effectively relieves the rigid pressure generated by the tightening of the metal clamp, preventing damage to the main cable and fireproof filler layer, while also helping to improve the durability of the entire structure.

[0021] Improved sealing: The sealing layer uses butyl rubber, which has excellent sealing and bonding properties. It can effectively prevent the penetration of air and moisture, further enhancing the sealing of the main cable fireproof outer layer wrapping structure and ensuring the long-term stability of the fireproof effect.

[0022] Furthermore, one side edge of the outer surface of the outer fireproof cloth layer and the other side edge of the inner surface of the sealant layer are provided with Velcro that can be enclosed and buckled.

[0023] The beneficial effects are: Quick Positioning and Pre-Tightening: A Velcro fastener is installed on one edge of the outer fireproofing fabric layer and the other edge of the inner sealant layer. This fastener allows for quick positioning of the pre-tightening force during the main cable wrapping process, improving construction convenience and efficiency. Construction workers can quickly secure the fireproof outer wrapping structure to the main cable before proceeding with the subsequent tightening operation, eliminating the tedious process of constant adjustment and alignment required with traditional methods, saving time and labor costs.

[0024] Enhanced structural integrity: During the wrapping process, Velcro tightly binds the fireproof and cushioning sealant layers together, enhancing overall structural stability. The Velcro's securement prevents the individual layers from shifting or loosening during construction, ensuring the integrity of the fireproof outer wrapping structure and providing a better foundation for subsequent fixing and sealing.

[0025] Furthermore, the integral structure composed of the fireproof combination layer and the buffer sealing combination layer is wrapped around the outside of the main cable and then tightened to the outside of the outer fireproof cloth layer by a metal clamp.

[0026] The beneficial effects are: Secure Fixation: By tightening the metal clamp around the outside of the main cable, the fireproof outer layer is securely fixed to the main cable, ensuring it will not loosen or fall off due to external forces during use. The metal clamp has high strength and stability, and can withstand high tension and pressure, providing reliable fixing for the entire fireproof structure.

[0027] Adaptable to Main Cables of Different Diameters: The metal clamp can be adjusted to the diameter of the main cable, offering excellent adaptability and meeting the fire protection requirements of main cables of varying specifications. This adjustable fixing method allows the fireproof outer wrapping structure to better fit the main cable surface, improving sealing and fire protection.

[0028] Enhanced structural strength: The tightening action of the metal clamp not only secures the fireproof outer layer but also strengthens the overall structure. In extreme situations such as fire, the metal clamp can withstand thermal expansion forces, preventing deformation or damage to the fireproof structure due to thermal expansion, thereby further improving the fire safety of the main cable.

[0029] Furthermore, after the metal clamps are connected, a basalt felt layer is bonded and laid on the curved top surface of the overall structure.

[0030] The beneficial effects are: Improving protection: After the metal clamps are connected, a basalt felt layer is bonded and laid on the curved top surface of the structure. This layer, with its excellent thermal insulation and wear resistance, further enhances the protective effectiveness of the main cable's fireproof outer layer. In the event of a fire, the basalt felt layer effectively blocks heat transfer and prevents flames from directly contacting the fireproof composite layer, enhancing the fire resistance of the entire structure.

[0031] Easy maintenance and walking: The basalt felt layer also facilitates walking during maintenance. Because of its thickness and elasticity, it provides cushioning and protection, preventing workers from stepping directly on the fireproof composite layer and damaging it. This extends the service life of the fireproof structure and reduces maintenance costs.

[0032] Furthermore, the bonding joints of the overall structure correspond to the basalt felt layer.

[0033] The beneficial effects are: Enhanced bond strength: The bond joints of the overall structure correspond to the basalt felt layer. The bonding effect of the basalt felt layer can improve the strength of the bond joints of the overall structure. This design makes the bond joints more secure, avoids structural loosening or cracking caused by weak bonding, and further improves the stability and reliability of the main cable fireproof outer layer.

[0034] Improved overall sealing: Strengthening the bonded joints also helps improve the sealing of the entire structure, preventing air and moisture from entering the fireproofing composite layer through the bonded joints, thereby ensuring long-term fire protection. Over long-term use, good sealing performance can effectively prevent aging and damage to the fireproofing material, extending its service life.

[0035] Furthermore, a supporting mesh layer is provided on the inner side of the fireproof filler layer.

[0036] The beneficial effects are: Enhance the strength of the fireproof filler layer: The setting of the supporting mesh layer can effectively enhance the strength and stability of the fireproof filler layer, preventing it from deformation or damage under external force or high temperature environment, thereby improving the compressive and impact resistance of the entire fireproof composite layer.

[0037] Improved Adhesion: The grid structure of the support mesh layer tightly bonds with the fireproof filler layer, enhancing its adhesion. During construction, the grid intersections of the support mesh layer effectively connect with the cells of the sewing thread, strengthening the bond between the layers and making the entire fireproof outer layer more compact and secure, further improving its fireproof performance and service life.

[0038] Furthermore, positioning locking points are evenly distributed on the supporting mesh layer, and positioning locking buckles are connected to the positioning locking points. The positioning locking buckles pass through the outer fireproof cloth layer, the inner fireproof cloth layer and the fireproof filler layer.

[0039] The beneficial effects are: Improve structural stability: Through the connection of positioning locks, the supporting mesh layer, outer fireproof cloth layer and inner fireproof cloth layer are tightly combined together to form an integral structure, which improves the stability and strength of the entire fireproof outer layer wrapping structure.

[0040] Enhanced fireproofing: The positioning lock effectively locks the support mesh layer in place, preventing it from shifting or loosening during use, further enhancing the fireproofing's effectiveness. This mechanical connection, combined with the sewing thread, ensures a more stable fireproofing layer when subjected to external forces, preventing degradation of fireproofing performance due to displacement.

[0041] Improved structural integrity: The positioning locks strengthen the integrity of the fireproof outer layer, ensuring a tighter fit between the layers, better maximizing their fireproofing, cushioning, and sealing properties. In extreme situations like fire, this integrated structure effectively protects the main cables from heat damage, ultimately ensuring the safety of the bridge structure.

[0042] Furthermore, after the overall structure composed of the fireproof combination layer and the buffer sealing combination layer is wrapped around the outside of the main cable, it is tightened to the outside of the outer fireproof cloth layer by a metal clamp, and the metal clamp is pressed onto the positioning lock buckle.

[0043] The beneficial effects are: Optimized fixing method: After the metal clamp is tightened, it presses against the positioning lock. This design allows the tightening force of the metal clamp to be evenly transmitted to the entire fireproof outer layer through the positioning lock, avoiding compression damage caused by direct contact between the metal clamp and the fireproof filler layer, further improving the stability and service life of the structure.

[0044] Enhanced structural reliability: The positioning lock works in conjunction with the metal clamp to ensure a more reliable fixation of the metal clamp. Even if the metal clamp is subjected to thermal expansion or external forces during long-term use, the positioning lock can buffer and disperse the force, preventing the metal clamp from loosening or damage, thereby improving the reliability and safety of the entire main cable fireproof outer wrapping structure.

[0045] Compared with the prior art, the present invention has the following advantages: 1) Easy installation and maintenance improve construction convenience and efficiency. Construction workers can quickly secure the fireproof outer wrap to the main cable and then perform subsequent tightening operations, avoiding the tedious process of constant adjustment and alignment required in traditional methods, saving time and labor costs.

[0046] 2) High sealing performance: During long-term use, good sealing performance can effectively prevent aging and damage of fireproof materials and extend their service life.

[0047] 3) The fireproof material of the present application is made of powder with good fireproof and heat-insulating properties, has good flexibility, can be processed into a higher thickness and is not easy to crack. The fireproof effect of a single layer exceeds that of a traditional double-layer structure, so the fireproof structure design is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings: Figure 1 A schematic diagram of the layered structure of the fireproof outer layer of the integrated main cable provided in Example 1; Figure 2 A schematic diagram of the layered structure of the integrated main cable fireproof outer layer with sewing thread provided in Example 1; Figure 3Schematic diagram of the structure of the integrated main cable fireproof outer wrapping structure provided in Example 1 wrapped around the main cable (sewing lines are not shown); Figure 4 A schematic diagram of the layered structure of the integrated main cable fireproof outer layer provided in Example 2; Figure 5 A schematic structural diagram of the support mesh layer provided in Example 3; Figure 6 A schematic plan view of the support mesh layer provided in Example 3; Figure 7 A schematic diagram of the structure of the integrated main cable fireproof outer layer wrapping structure provided in Example 3 (sewing lines not shown); Figure 8 A schematic structural diagram of the positioning lock provided in Example 4; Figure 9 A cross-sectional view of the positioning lock provided in Example 4; Figure 10 Schematic diagram of the structure of the integrated main cable fireproof outer layer wrapping structure provided in Example 4 wrapped around the main cable (sewing lines are not shown).

[0049] in: 10 is the main cable; 20 is the fireproof composite layer; 30 is the buffer sealing composite layer; 40 is the Velcro; 50 is the metal clamp; 60 is the basalt felt layer; 200 is the outer fireproof cloth layer; 201 is the inner fireproof cloth layer; 202 is the fireproof filler layer; 203 is the sewing thread; 204 is the unit cell; 205 is the supporting mesh layer; 2050 is the positioning lock point; 2051 is the disc; 2052 is the connecting hole; 206 is the positioning lock buckle; 2060 is the female base; 2061 is the male plug; 2062 is the arc plate; 2063 is the arc groove; 300 is a rubber layer; 301 is a sealant layer. DETAILED DESCRIPTION

[0050] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0051] It should be understood that the terms described herein are intended only to describe particular embodiments and are not intended to limit the present invention. In addition, for numerical ranges herein, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Each smaller range between any intermediate value within a stated value or stated range and any other stated value or intermediate value within the stated range is also encompassed by the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded within the scope.

[0052] Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein may also be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of any conflict with any incorporated document, the contents of this specification shall prevail.

[0053] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from the description of the invention. The description and examples are intended to be illustrative only.

[0054] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to. Example

[0055] See attached Figure 1 This embodiment discloses a fireproof structure for the main cable of a suspension bridge that is easy to construct and is used to wrap around the outside of the main cable 10 of the suspension bridge; it includes: a fireproof composite layer 20 and a buffer sealing composite layer 30: The fireproof combination layer 20 includes: an outer fireproof cloth layer 200, an inner fireproof cloth layer 201 and a fireproof filler layer 202. The outer fireproof cloth layer 200 and the inner fireproof cloth layer 201 wrap the fireproof filler layer 202 inside. The fireproof filler layer 202 is a flexible layered structure formed by mixing multiple fireproof powders. The buffer sealing composite layer 30 includes a rubber layer 300 and a sealant layer 301 which are sequentially compounded on the outer surface of the inner fireproof cloth layer 201; the sealant layer 301 is wrapped around the outer surface of the main cable 10 so that the outer fireproof cloth layer 200 is exposed.

[0056] See attached Figure 2 The outer surfaces of the outer fireproof cloth layer 200 and the inner fireproof cloth layer 201 are processed with sewing threads 203, and the sewing threads 203 are staggered to form a plurality of cells 204. The fireproof filler layer 202 is divided and confined within the cells 204 by the sewing threads 203.

[0057] Furthermore, the outer fireproof cloth layer 200 and the inner fireproof cloth layer 201 are any one of quartz cloth and high silica cloth; The fireproof filler layer 202 is an aerogel filler layer; The rubber layer 300 is made of silicone rubber; The sealant layer 301 is made of butyl rubber.

[0058] In this embodiment, the outer fireproof cloth layer 200 is made of quartz cloth, which can meet the fireproofing requirements of 1200°C, and the inner fireproof cloth layer 201 is made of high-silica cloth, which can meet the fireproofing requirements of 1050°C.

[0059] In this embodiment, the fireproof filler layer 202 may specifically be: Silica Aerogel: The most common type of aerogel, it has good thermal insulation properties and transparency and is widely used in construction, aerospace and other fields.

[0060] Carbon Aerogel: It has good conductivity and chemical stability and is suitable for fields such as electrode materials and supercapacitors.

[0061] Alumina Aerogel: It has high mechanical strength and good fire resistance, and is suitable for thermal insulation and fire protection applications in high temperature environments.

[0062] In this embodiment, the fireproof filler layer 202 is mixed and formed by physical compression and extrusion, and a powder board is formed by the friction between the powders, and is wrapped and fixed by the outer fireproof cloth layer 200 and the inner fireproof cloth layer 201.

[0063] Furthermore, in order to meet the requirements of rapid positioning, one side edge of the outer surface of the outer fireproof cloth layer 200 and the other side edge of the inner surface of the sealant layer 301 are provided with a Velcro 40 that can be enclosed and buckled, and rapid pre-tightening positioning can be achieved after winding.

[0064] See attached Figure 3 The overall structure consisting of the fireproof combination layer 20 and the buffer sealing combination layer 30 is wrapped around the outside of the main cable 10 and then tightened to the outside of the outer fireproof cloth layer 200 through the metal clamp 50.

[0065] In this embodiment, the traditional fastening method of tightening the metal clamp 50 is still used to achieve fixation, but since the integrated main cable fireproof outer layer wrapping structure provided in this embodiment has a rubber layer 300, the tightening effect of the metal clamp 50 can be alleviated by the rubber layer 300, preventing it from being hard pressed on the main cable 10, causing damage to the fireproof filler layer 202.

[0066] To further enhance the protective effect, after the metal clamp 50 is connected, a basalt felt layer 60 is bonded and laid on the curved top surface of the overall structure. The purpose of providing the basalt felt layer 60 in this embodiment is to facilitate walking during the subsequent maintenance process. The basalt felt layer 60 can play a protective role and prevent damage to the fireproof filler layer 202 caused by direct stepping.

[0067] At the same time, in order to meet the coordination between the basalt felt layer 60 and the integrated main cable fireproof outer layer wrapping structure, the bonding joints of the overall structure correspond to the basalt felt layer 60, and the strength of the bonding joints of the overall structure is improved by the bonding of the basalt felt layer 60.

[0068] According to the technical solution provided by this embodiment, only one lap joint is required after coating, and it is located entirely on the upper surface of the main cable. Subsequent coverage with a basalt felt layer 60 does not affect the appearance. Due to the special properties of the material, a single-layer structure can reach a thickness of 10 mm, providing excellent flexibility and maintaining fire resistance. This overcomes the limitation of conventional aerogel materials that cannot be made too thick during processing, allowing the traditional double-layer structure to meet the requirements of the single-layer structure of this embodiment.

[0069] In addition, since the quartz cloth of the outer layer of the material has strong toughness and wear resistance, and is sewn with high-strength Velcro 40, the tensioning force of the covering structure can be achieved without winding, so that the fireproof layer will not slide due to the vibration of the bridge.

[0070] Finally, the construction efficiency of this embodiment is improved, the safety risk is reduced, and the construction cost is reduced. At the same time, due to the accelerated construction progress, the social and traffic impacts such as road closures are reduced. Example

[0071] This embodiment is a further improvement on the basis of embodiment 1. In order to improve the strength and bonding force of the fireproof filler layer 202, as shown in FIG. Figure 4 As shown, a support mesh layer 205 is provided on the inner side of the fireproof filler layer 202. The support mesh layer 205 is a staggered grid structure, and is embedded into the inner portion for processing during the pressing process of the fireproof filler layer 202.

[0072] like Figure 4 As shown, the sewing thread 203 forms a plurality of cells 204, and the supporting mesh layer 205 also forms a plurality of grids. During the processing and manufacturing process, the intersection of the grids of the supporting mesh layer 205 falls into the cells 204 of the sewing thread 203, which is equivalent to the diagonal lines connecting the cells 204. This will not affect the sewing processing of the sewing thread 203, and is also conducive to improving the viscosity.

[0073] In this embodiment, the supporting mesh layer 205 is made of basalt. Example

[0074] This embodiment is a further improvement on the basis of embodiment 2. In order to improve the structural stability of the supporting mesh layer 205 and the strength of the overall structure, positioning locking points 2050 are evenly distributed on the supporting mesh layer 205. Positioning lock buckles 206 are connected to the positioning locking points 2050. The positioning lock buckles 206 pass through the outer fireproof cloth layer 200, the inner fireproof cloth layer 201 and the fireproof filler layer 202.

[0075] See attached Figure 5 and attached Figure 6 The positioning lock point 2050 is selected at the intersection of the grid of the supporting mesh layer 205, and a disc 2051 is made at the intersection. The disc 2051 is provided with a connecting hole 2052, and the positioning lock buckle 206 can pass through the connecting hole 2052 for connection.

[0076] After being connected by the positioning lock buckle 206, the support mesh layer 205, the outer fireproof cloth layer 200, and the inner fireproof cloth layer 201 are mechanically connected to form a whole. The outer fireproof cloth layer 200 and the inner fireproof cloth layer 201 lock the position of the support mesh layer 205, and the sewing thread 203 also effectively defines the position of the support mesh layer 205. At the same time, the support mesh layer 205 improves the bonding strength of the fireproof filler layer 202, making the overall structural integrity stronger.

[0077] The integrated main cable fireproof outer layer wrapping structure after connecting the positioning lock 206 is as follows Figure 7 shown. Example

[0078] See attached Figure 8 and attached Figure 9 This embodiment discloses the specific structure of the positioning lock buckle 206 provided in Example 3. The positioning lock buckle 206 includes: a female base 2060 and a male plug 2061. The female base 2060 has an arc-shaped plate 2062 adapted to the arc-shaped surface of the main cable 10. The female head on the arc-shaped plate 2062 corresponds to the connection hole 2052 on the disc 2051. The male plug 2061 passes through the connection hole 2052 and is plugged into the female head on the arc-shaped plate 2062. During assembly, the entire surface layer can be pierced directly at the position corresponding to the connection hole 2052 on the disc 2051. After connection, glue is applied to seal it.

[0079] Furthermore, the exposed head of the male plug 2061 has an arc groove 2063. In this way, the metal clamp 50 can be tightened in the arc groove 2063 of the male plug 2061. While playing a tightening role, it also prevents the metal clamp 50 from directly contacting the integrated main cable fireproof outer layer wrapping structure, preventing it from compressing the fireproof filler layer 202 and causing damage. The structure after connection is as follows: Figure 10 shown.

[0080] Therefore, in order to meet the requirements of the metal hoop 50 and the arc groove 2063, the arrangement of the positioning lock 206 is as follows: Figure 7 As shown, three annular rings are formed after being enclosed, and each annular ring has four evenly distributed positioning lock buckles 206, which can directly serve as support for the metal hoop 50.

[0081] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A fireproof structure for the main cable of a suspension bridge with convenient construction, which is used to wrap around the outside of the main cable of the suspension bridge; characterized in that: include: Fireproof composite layer and buffer sealing composite layer; The fireproof composite layer includes: an outer fireproof cloth layer, an inner fireproof cloth layer and a fireproof filler layer, wherein the outer fireproof cloth layer and the inner fireproof cloth layer wrap the fireproof filler layer inside, and the fireproof filler layer is a flexible layered structure formed by mixing multiple fireproof powders; The buffer sealing composite layer includes a rubber layer and a sealant layer which are sequentially compounded on the outer surface of the inner fireproof cloth layer; the sealant layer is adhered to the outer surface of the main cable and wrapped around it, so that the outer fireproof cloth layer is exposed.

2. The fire protection structure for main cables of a suspension bridge with convenient construction according to claim 1, characterized in that: The outer surfaces of the outer fireproof cloth layer and the inner fireproof cloth layer are processed with sewing threads, and the sewing threads are staggered to form a plurality of cells. The fireproof filler layer is divided and confined within the cells by the sewing threads.

3. The fire protection structure for main cables of a suspension bridge with convenient construction according to claim 1 is characterized in that: The outer fireproof cloth layer and the inner fireproof cloth layer are any one of quartz cloth and high silica cloth; The fireproof filler layer is a mixture of one or more of silica aerogel, carbon aerogel and alumina aerogel; The rubber layer is made of silicone rubber; The sealant layer is butyl rubber.

4. The fire protection structure for main cables of a suspension bridge with convenient construction according to claim 1, characterized in that: One side edge of the outer surface of the outer fireproof cloth layer and the other side edge of the inner surface of the sealant layer are provided with Velcro that can be enclosed and buckled.

5. A fire protection structure for main cables of a suspension bridge with convenient construction according to any one of claims 1 to 4, characterized in that: The integral structure composed of the fireproof combination layer and the buffer sealing combination layer is wrapped around the outside of the main cable and then tightened to the outside of the outer fireproof cloth layer by a metal clamp.

6. The fire protection structure for main cables of a suspension bridge with convenient construction according to claim 5, characterized in that: After the metal clamps are connected, a basalt felt layer is bonded and laid on the curved top surface of the overall structure.

7. The fire protection structure for main cables of a suspension bridge with convenient construction according to claim 6, characterized in that: The bonding joints of the overall structure correspond to the basalt felt layer.

8. A fire protection structure for main cables of a suspension bridge with convenient construction according to any one of claims 1 to 4 or any one of claims 6 to 7, characterized in that: A supporting mesh layer is provided on the inner side of the fireproof filler layer.

9. The fire protection structure for main cables of a suspension bridge with convenient construction according to claim 8, characterized in that: Positioning locking points are evenly distributed on the supporting mesh surface layer, and positioning locking buckles are connected to the positioning locking points. The positioning locking buckles pass through the outer fireproof cloth layer, the inner fireproof cloth layer and the fireproof filler layer.

10. The fire protection structure for main cables of a suspension bridge with convenient construction according to claim 9, characterized in that: After the integral structure consisting of the fireproof combination layer and the buffer sealing combination layer is wrapped around the outside of the main cable, it is tightened on the outside of the outer fireproof cloth layer by a metal clamp, and the metal clamp is pressed on the positioning lock buckle.

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