Fireproof structure of gas clamp observation window

Abstract

A gas clamp observation window fireproof structure relates to the technical field of bridge cable facilities, a gas clamp is cylindrical and comprises an upper gas clamp and a lower gas clamp, an opening is arranged on the upper gas clamp and / or the lower gas clamp, an observation window is arranged at the opening, the observation window comprises an observation window pressing plate and observation window glass, and a fireproof cover is arranged outside the observation window pressing plate. The observation window has good fireproof performance, when a fire disaster occurs, the fireproof cover can bear high temperature, and common curved glass is prevented from being broken due to thermal impact, so that the integrity of the observation window is maintained, and effective protection is provided for the main cable.

Description

Technical Field

[0001] This utility model relates to the field of bridge cable facilities technology, and in particular to a fireproof structure for an air-clamp observation window. Background Technology

[0002] The main cable is the main load-bearing component of a suspension bridge. It mainly bears tensile force and is generally made of steel with high tensile strength (steel wire, steel cable, etc.).

[0003] Since the main cable cannot be replaced, its maintenance is crucial. Currently, establishing a dehumidification system is one of the commonly used main cable protection technologies: dry air is introduced into the gaps in the main cable to remove moisture. Air clips are an important component of the dehumidification system, and they are generally equipped with observation windows. With the increase in vehicles and traffic volume, fires caused by traffic accidents are frequent in cable-stayed bridges. Although cables, as key load-bearing components, have good mechanical properties and weather resistance, their fire resistance is poor. The high-temperature radiation from combustion can directly damage the main cable's load-bearing structure through the air clips, potentially leading to the destruction of the entire bridge's load-bearing system and seriously threatening bridge safety.

[0004] Existing observation windows, such as the patent with authorization announcement number "CN203878482U" and title "An air clamp for bridge cables that facilitates air intake, exhaust, and maintenance," have a structure consisting of two semi-circular arc-shaped shells (1) joined together to form a cylindrical shape. Each of the two semi-circular arc-shaped shells (1) has an arc-shaped observation window (2), and an arc-shaped transparent glass connected to the semi-circular arc-shaped shell (1) is embedded in the arc-shaped observation window (2). The problems are: 1. The observation window is exposed and has no fireproof function, making it a weak link in the entire main cable fire protection system. Once a fire occurs, the high temperature radiation of the flames will easily cause the glass to break, resulting in the high temperature causing fatal damage to the internal main cable; 2. The observation window is a curved / arc structure. Since the curvature of the curved glass needs to be precisely matched with the curvature of the air clamp, the versatility between curved glass with different curvatures is poor. Once the specifications of the air clamp change, the original curved glass may no longer be usable and needs to be remade. In addition, the sealing plate used to fix curved glass also needs to be specially customized according to its curvature, which limits its versatility; 3. When installing curved glass, if its curvature does not match the curvature of the air clip, or if the curvature of the sealing plate is inconsistent with the curved glass, it will affect the sealing performance and easily lead to uneven stress on the glass. Under the pressure inside the air clip or the action of external impact, this uneven stress may cause the glass to crack or even break, posing a hidden danger to the protective function of the air clip, and also posing a safety hazard to the operators and the surrounding environment; 4. Ordinary glass has poor impact resistance and penetration resistance. After breaking, it is easy to form sharp fragments, which may cause injury to vehicles and people crossing the bridge, resulting in insufficient safety. In addition, ordinary glass has poor heat insulation performance, ultraviolet blocking performance, and sound insulation performance. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fireproof structure for an air-clamped observation window. This structure has excellent fireproof performance. In the event of a fire, the fireproof cover can withstand high temperatures, preventing ordinary curved glass from breaking due to thermal shock, thereby maintaining the integrity of the observation window and providing effective protection for the main cable.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A fireproof structure for an air-clamp observation window is disclosed. The air clamp is cylindrical and includes an upper air clamp and a lower air clamp. An opening is provided on the upper and / or lower air clamp, and an observation window is provided at the opening. The observation window includes an observation window pressure plate and an observation window glass. A fireproof cover is provided outside the observation window pressure plate. The upper and lower air clamps are semi-cylindrical and made of stainless steel. The upper and lower air clamps are assembled into a cylindrical air clamp by bolts, nuts, or other fixing structures. The observation window glass is used to fix and seal the observation window glass. The fireproof cover can be removed when observation is needed, and the observation window glass is protected in the event of a fire.

[0008] Preferably, the outer surface of the fireproof cover is provided with a fireproof layer, which includes an epoxy fireproof coating layer and a fluorocarbon coating layer from the inside out. The inner surface of the fireproof cover is provided with a fireproof layer, which includes a silicone structural adhesive layer and an aerogel layer from the inside out. The epoxy fireproof coating layer is applied by scraping and serves to insulate against high-temperature conduction. The fluorocarbon coating layer is a topcoat layer, applied by roller coating, brushing, or spraying, and is used for corrosion protection and coloring at room temperature. The silicone structural adhesive layer is applied by scraping and is used to fix the aerogel. The aerogel layer is applied by scraping and serves to insulate against high-temperature conduction.

[0009] Preferably, the epoxy fire-retardant coating layer includes a first epoxy fire-retardant coating layer and a second epoxy fire-retardant coating layer, with a reinforcing high-temperature fiber mesh disposed between the first and second epoxy fire-retardant coating layers. The reinforcing high-temperature fiber mesh is bonded and fixed by the coating layer, thereby strengthening the fire-retardant coating.

[0010] Preferably, the aerogel layer is made of quartz nano-aerogel, i.e., silica nano-aerogel or silicon-based nano-aerogel, and the reinforcing high-temperature fiber mesh is made of ceramic fiber or high-silica fiber.

[0011] Preferably, the surface of the aerogel layer is provided with a structural reinforcing mesh made of stainless steel wire, which is used to strengthen the structural strength of the fireproof layer and prevent the fireproof layer from falling off.

[0012] Preferably, the outer and inner surfaces of the air clip are provided with the same fireproof layer as the fireproof cover. That is, the outer surface of the air clip includes, from the inside out, a first epoxy fireproof coating layer, a reinforcing high-temperature fiber mesh, a second epoxy fireproof coating layer, and a fluorocarbon coating layer. The inner surface of the air clip includes, from the inside out, a silicone structural adhesive layer and an aerogel layer, thereby improving the fireproof performance of the air clip.

[0013] Preferably, the surface of the aerogel layer of the air clip is provided with a structural reinforcing mesh made of stainless steel wire, which is used to strengthen the structural strength of the fireproof layer and prevent the fireproof layer from falling off.

[0014] Preferably, the observation window pressure plate is flat and includes an observation window base plate and an observation window cover plate. The observation window base plate and the observation window cover plate are fixed by a certain number of bolt, nut, and washer assemblies. The observation window glass is flat and is laminated glass. Specifically, an opening is provided in the middle area of ​​the observation window base plate and the observation window cover plate. A glass groove is provided on the outside of the opening in the observation window base plate, and the observation window glass is located in the glass groove. A certain number of circumferentially distributed screw holes are provided on the outside of the observation window base plate, and corresponding through holes are provided in the observation window cover plate. The observation window glass is fixed and sealed by the bolt, nut, and washer assemblies.

[0015] Preferably, the observation window glass is PVB laminated glass. It has good transparency, maintaining a clear visual effect; excellent bonding properties, ensuring a strong bond between the glass and the film, making separation difficult; strong impact resistance, effectively resisting external impacts; even if the glass breaks, the fragments will adhere to the film, preventing them from flying and causing injury or falling; and certain heat insulation, UV protection, and sound insulation properties, reducing the transmission of heat, ultraviolet rays, and noise to a certain extent.

[0016] Preferably, the fireproof cover and the observation window pressure plate are connected by threads or snaps, or other connection methods that are easy to disassemble and assemble.

[0017] The advantages of this utility model are: 1. It has excellent fire resistance. In the event of a fire, the fireproof cover can withstand high temperatures, preventing ordinary curved glass from breaking due to thermal shock, thus maintaining the integrity of the observation window and providing effective protection for the main cable. The fireproof cover can effectively block flames and heat from directly contacting the main cable, preventing its performance from deteriorating due to high temperatures, ensuring the load-bearing capacity of the main cable, and thus ensuring the safety of the bridge structure.

[0018] 2. The fireproof cover not only serves its purpose during a fire, but also acts as an additional protective layer during normal times, reducing the impact of external environmental factors such as ultraviolet rays, wind and rain erosion, and dust accumulation on the observation window glass and main cable, delaying material aging, and extending the overall service life of the air-clamp observation window and main cable.

[0019] 3. Because the fireproof cover can protect the observation window glass and the main cable, it reduces the frequency of repairs and replacements required due to broken glass and damaged main cable, thereby reducing the maintenance cost of the suspension bridge.

[0020] 4. The fireproof cover does not affect the normal observation function of the observation window in non-fire conditions. Staff can still easily inspect and maintain the internal condition of the main cable through the observation window, promptly identifying potential problems and ensuring the safe operation of the bridge. During maintenance, the fireproof cover provides additional safety for staff, allowing for more evacuation time even in the event of a fire, reducing the occurrence of accidents.

[0021] 5. The fireproof cover and fireproof gas clamp structure enhances the safety of the suspension bridge in extreme situations such as fires, improves the overall reliability and stability of the bridge, and ensures safe operation within its design service life. It helps the suspension bridge meet higher fire safety standards and regulations, raising its safety level and making it more adaptable to various complex operating environments and potential risks.

[0022] 6. The observation window adopts a flat plate structure. The shape of the flat glass is fixed and unaffected by the curvature of the gas clamp, making it compatible with gas clamps of different diameters and shapes. Only the appropriate flat glass size needs to be selected based on the specific dimensions of the gas clamp, thus improving its versatility. Furthermore, flat glass installation is relatively simple, with more even stress distribution, reducing the likelihood of glass breakage due to installation issues, and providing good sealing performance. The sealing pressure plate of the flat glass can use a universal design, requiring only appropriate adjustments based on the glass dimensions, further enhancing its versatility.

[0023] 7. Laminated glass has relatively high strength and good impact and penetration resistance. Under the same external force, it is less likely to break. Even if the glass breaks, the fragments will be held together by the interlayer, preventing them from flying and causing injury, thus reducing safety hazards. In addition, laminated glass has good heat insulation, UV protection, and sound insulation properties, which can reduce the transmission of heat, ultraviolet rays, and noise to a certain extent. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the base of this utility model;

[0025] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 for Figure 2 Enlarged diagram of point B in the middle.

[0027] Explanation of key component symbols in the diagram:

[0028] 11. Air clamp;

[0029] 21. Observation window bottom plate; 22. Observation window cover plate; 23. Observation window glass; 24. Bolt, nut and washer assembly;

[0030] 31. Fireproof cover; 32. First epoxy fireproof coating layer; 33. Reinforcing high-temperature fiber mesh; 34. Second epoxy fireproof coating layer; 35. Fluorocarbon coating layer; 36. Silicone structural adhesive layer; 37. Aerogel layer; 38. Structural reinforcement mesh. Detailed Implementation

[0031] To more clearly illustrate this utility model, the following description, in conjunction with the accompanying drawings, will provide further details.

[0032] Example 1: As Figure 1-2 As shown, a fireproof structure for an air clamp observation window is provided. The air clamp 11 is cylindrical and includes an upper air clamp and a lower air clamp. An opening is provided on the upper air clamp and / or the lower air clamp, and an observation window is provided at the opening. The observation window includes an observation window pressure plate and an observation window glass 23. A fireproof cover 31 is provided outside the observation window pressure plate.

[0033] The fireproof cover 31 is connected to the observation window pressure plate by threads, snaps or other means that facilitate disassembly and assembly.

[0034] Example 2: Combination Figure 3 As shown, based on Embodiment 1, the outer surface of the fireproof cover 31 is provided with a fireproof layer, which includes an epoxy fireproof coating layer and a fluorocarbon coating layer 35 from the inside to the outside. The inner surface of the fireproof cover 31 is provided with a fireproof layer, which includes a silicone structural adhesive layer 36 and an aerogel layer 37 from the inside to the outside.

[0035] The aerogel layer 37 is made of quartz nano-aerogel.

[0036] Example 3: Combination Figure 3 As shown, based on Embodiment 2, the epoxy fire-retardant coating layer includes a first epoxy fire-retardant coating layer 32 and a second epoxy fire-retardant coating layer 34, with a reinforcing high-temperature fiber mesh 33 disposed between the first epoxy fire-retardant coating layer 32 and the second epoxy fire-retardant coating layer 34.

[0037] The reinforced high-temperature fiber mesh 33 is made of ceramic fiber or high-silica fiber.

[0038] Example 4: Combination Figure 3 As shown, based on Embodiment 2, a structural reinforcing mesh 38 is provided on the surface of the aerogel layer 37.

[0039] Among them, the reinforcing mesh 38 is made of stainless steel wire.

[0040] Example 5: Based on Example 2, Example 3 or Example 4, the outer and inner surfaces of the air clip 11 are provided with the same fireproof layer as the fireproof cover 31.

[0041] Example 6: Combination Figure 2 As shown, based on the above embodiment, the observation window pressure plate is flat and includes an observation window bottom plate 21 and an observation window cover plate 22. The observation window bottom plate 21 and the observation window cover plate 22 are fixed by a certain number of bolt, nut and washer assemblies 24. The observation window glass 23 is flat and is laminated glass.

[0042] The observation window glass 23 is PVB laminated glass.

[0043] The above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. The present utility model can be used in similar products. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A fireproof structure for an air-clamp observation window, wherein the air clamp (11) is cylindrical and includes an upper air clamp and a lower air clamp, characterized in that: The upper and / or lower air clamps are provided with openings, and observation windows are provided at the openings; The observation window includes an observation window pressure plate and an observation window glass (23), and a fireproof cover (31) is provided outside the observation window pressure plate.

2. The fireproof structure of the air-clamp observation window according to claim 1, characterized in that: The outer surface of the fireproof cover (31) is provided with a fireproof layer, which includes an epoxy fireproof coating layer and a fluorocarbon coating layer (35) from the inside to the outside. The inner surface of the fireproof cover (31) is provided with a fireproof layer, which includes a silicone structural adhesive layer (36) and an aerogel layer (37) from the inside to the outside.

3. The fireproof structure of the air-clamp observation window according to claim 2, characterized in that: The epoxy fire-retardant coating layer includes a first epoxy fire-retardant coating layer (32) and a second epoxy fire-retardant coating layer (34), and a reinforcing high-temperature fiber mesh (33) is provided between the first epoxy fire-retardant coating layer (32) and the second epoxy fire-retardant coating layer (34).

4. The fireproof structure of the air-clamp observation window according to claim 3, characterized in that: The aerogel layer (37) is made of quartz nano-aerogel, and the reinforcing high-temperature fiber mesh (33) is made of ceramic fiber or high-silica fiber.

5. The fireproof structure of the air-clamp observation window according to claim 2, characterized in that: The surface of the aerogel layer (37) is provided with a structural reinforcing mesh (38), which is made of stainless steel wire.

6. A fireproof structure for an air-clamp observation window according to any one of claims 2-5, characterized in that: The outer and inner surfaces of the air clip (11) are provided with the same fireproof layer as the fireproof cover (31).

7. The fireproof structure of the air-clamp observation window according to claim 1, characterized in that: The observation window pressure plate is flat and includes an observation window bottom plate (21) and an observation window cover plate (22). The observation window bottom plate (21) and the observation window cover plate (22) are fixed by a certain number of bolt, nut and washer assemblies (24). The observation window glass (23) is flat and is laminated glass.

8. The fireproof structure of the air-clamp observation window according to claim 7, characterized in that: The observation window glass (23) is PVB laminated glass.

9. The fireproof structure of the air-clamp observation window according to claim 7, characterized in that: The fireproof cover (31) is connected to the observation window pressure plate by means of threads or snaps.

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