CN219099797U - Fireproof wrapping structure of suspension bridge main cable - Google Patents
Fireproof wrapping structure of suspension bridge main cable Download PDFInfo
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- CN219099797U CN219099797U CN202320049637.4U CN202320049637U CN219099797U CN 219099797 U CN219099797 U CN 219099797U CN 202320049637 U CN202320049637 U CN 202320049637U CN 219099797 U CN219099797 U CN 219099797U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The utility model discloses a fireproof wrapping structure of a main cable of a suspension bridge, which comprises a heat insulation layer, a fire-retarding and cutting-preventing layer, a flame-retarding wrapping belt and flame-retarding sealant, wherein the heat insulation layer, the fire-retarding and cutting-preventing layer and the flame-retarding wrapping belt are sequentially arranged on the periphery of the main cable from inside to outside, and the flame-retarding sealant is arranged on straight seams and circular seams of a cable clamp. Through set up the insulating layer of high temperature resistant low coefficient of thermal conductivity in the main cable outside, protect the main cable from the conflagration injury, through set up the inside insulating layer of fire-retardant cutting prevention layer protection outside the insulating layer, improve main cable surface anti-cutting performance, avoid simultaneously that the main cable twines the area when construction and twine the rolling damage of chartered plane to inside insulating layer. The fire-retardant wrapping tape wraps the fire-retardant anti-cutting layer in a spiral wrapping mode, so that the protective structure of the main cable has better strength, meanwhile, the manufacturing cost is reduced, and the capability of the main cable in the aspects of fire disaster, artificial damage and accidental injury is improved.
Description
Technical Field
The utility model relates to the technical field of bridge construction, in particular to a fireproof wrapping structure of a main cable of a suspension bridge.
Background
The main cable of the suspension bridge is used as a life line of the suspension bridge, the safety of the bridge structure is directly determined, important protection is needed, and factors causing the damage of the main cable of the suspension bridge mainly comprise mechanical collision, artificial cutting damage, fire burning and corrosion. The bridge is sealed, and the dehumidification system is additionally arranged, so that corrosion injury to the main cable steel wire can be delayed, and the technology in the aspect is gradually matured. The technology for dealing with fire disaster, artificial damage and accidental injury to the main cable is still lacking.
Aiming at the problems, the utility model provides a protection structure of a suspension bridge main cable, which can effectively cope with fire, artificial damage and accidental injury.
Disclosure of Invention
The utility model aims to provide a fireproof wrapping structure of a main cable of a suspension bridge, so as to improve the coping capability of the main cable in the aspects of fire disaster, artificial damage and accidental injury.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a fire prevention of suspension bridge main rope twines package structure, includes from interior to outside sets gradually at main rope outlying insulating layer, fire-retardant cutting prevention layer and fire-retardant packing belt to and set up in the fire-retardant sealant of cable clamp circumferential weld, straight slit, fire-retardant packing belt wraps up fire-retardant cutting prevention layer with the spiral packing mode, and adjacent two-layer packing belt has the partial overlap.
Further, the wrapping distance between two adjacent layers of the flame-retardant wrapping tape is 50% -30% of the wrapping bandwidth, so that the surface of the main cable is ensured to be uniformly covered with more than 2 layers of wrapping tape.
Furthermore, the flame-retardant wrapping belt is of a three-layer composite structure, the inner layer and the outer layer are respectively chlorosulfonated polyethylene rubber, and the middle layer is polyester mesh cloth.
Further, the heat insulation layer is installed in an integral wrapping mode, the heat insulation layer is wrapped on the main cable of the suspension bridge from bottom to top, and the wrapping butt joint is arranged at the top of the main cable or is far away from the inclined upper part of the lane.
Furthermore, the heat insulation layer is spliced among joints along the main cable direction.
Further, the fire-retarding and cutting-preventing layer comprises a flame-retardant epoxy resin layer, high-silica glass cloth and a high-impact-resistance flame-retardant epoxy resin layer from inside to outside.
Furthermore, hollow glass beads are added in the flame-retardant epoxy resin layer and the high impact-resistant flame-retardant epoxy resin layer, so that the heat conductivity can be effectively reduced, and the heat transfer to the main cable is reduced.
Further, refractory fibers are arranged in the cable clamp circular seams and the straight seams, and flame-retardant sealant is arranged on the surfaces of the refractory fibers.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the heat insulation layer with high temperature resistance and low heat conductivity coefficient is arranged outside the main cable, so that the main cable is protected from fire disaster, the fire-retarding and cutting-preventing layer is arranged outside the heat insulation layer, so that the cutting resistance and the impact resistance of the surface of the main cable are improved, the protection structure of the main cable has better strength, the manufacturing cost is reduced, and the rolling damage of the wrapping machine on the inner heat insulation layer during the construction of the wrapping belt of the main cable is avoided; the flame-retardant wrapping tape adopts chlorosulfonated polyethylene, has the characteristics of ozone aging resistance, chemical medium resistance, good flame retardance and the like, and after more than 2 layers of wrapping tapes are heated and pressed and welded, the inner layer and the outer layer of the wrapping tape are fused to form an integrated sealing layer, so that the flame-retardant wrapping tape has good fireproof and waterproof effects.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic diagram showing the overlapping relationship of the flame retardant wrapping tape after wrapping;
FIG. 3 is a schematic view of the structure of the wrapping band of the present utility model;
FIG. 4 is a schematic cross-sectional view of a fire-retarding and cut-preventing layer of the present utility model;
FIG. 5 is a schematic view of the installation and construction of the flame retardant wrapping tape of the present utility model.
In the figure: 1-a cable clip; 2-flame-retardant sealant; 3-flame-retardant wrapping tape; 31-an inner layer; 32-an intermediate layer; 33-an outer layer; 4-a fire-retarding and cutting-preventing layer; 41-a high impact resistant flame retardant epoxy layer; 42-high silica glass cloth layer; 43-a flame retardant epoxy layer; 5-a heat insulation layer; 6, winding the main cable; 7-winding round wires; 8-a heating device; 9-a tape winder; l (L) 0 -standard width of wrapping tape; l (L) 1 -a wrapping distance.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
The utility model provides a technical scheme that: according to fire characteristics, the protection structure of the main cable is generally arranged on a main cable section with the height of 12 meters upwards on a bridge deck, the outer surface of the main cable of the suspension bridge is a main cable winding 6, a round winding 7 is arranged on the periphery of the main cable winding 6, the fireproof winding structure is arranged on the periphery of the round winding 7, a heat insulation layer 5 is sequentially arranged on the periphery of the round winding 7 from inside to outside, a fire-retarding and cutting-preventing layer 4 is arranged on the periphery of the heat insulation layer 5, and a flame-retarding winding belt 3 is arranged on the periphery of the fire-retarding and cutting-preventing layer 4.
In this embodiment, as shown in fig. 2 (the heat insulation layer 5 and the fire-retarding and cutting-preventing layer 4 are not shown), the standard width of the flame-retarding wrapping tape 3 is L 0 Wrapping distance L between two adjacent wrapping belts 1 30% of the wrapping band width, when the wrapping distance L 1 When the thickness of the main cable is less than 50%, more than 2 layers of wrapping belts can be uniformly covered on the surface of the main cable, after the heating, pressurizing and welding, the inner layer and the outer layer of the wrapping belts are mutually fused to form an integrated sealing fireproof and anti-corrosion protective layer, and the main cable has good fireproof and waterproof effects.
As shown in fig. 3, the flame-retardant wrapping tape 3 has a three-layer composite structure, the inner layer 31 and the outer layer 33 are respectively chlorosulfonated polyethylene rubber, and the middle layer 32 is polyester mesh cloth.
As shown in fig. 4, the fire-retardant and cut-resistant layer 4 comprises a flame-retardant epoxy resin 43, a high silica glass cloth 42 and a high impact-resistant flame-retardant epoxy resin 41 from inside to outside, wherein the high silica glass cloth 42 has high strength and high temperature resistance, can withstand the test of 1100 ℃, has a high Wen Dang outside the glass cloth, reduces the internal temperature and mainly plays a role in fire retarding; the high impact flame retardant epoxy resin 41 and the flame retardant epoxy resin 43 have the characteristics of high impact strength, good flame retardance and the like, and the functions of the high impact flame retardant epoxy resin and the flame retardant epoxy resin are to bond various materials into a whole structure to form a sealing state. In this embodiment, hollow glass beads (not shown in the figure) are added into the flame-retardant epoxy resin layer 43 and the high impact-resistant flame-retardant epoxy resin layer 41, so that the thermal conductivity can be further effectively reduced, the heat transfer to the main cable is reduced, and the safety of the main cable is better protected.
The insulating layer 5 is made of inorganic fireproof materials, preferably ceramic fiber fireproof materials or silica aerogel felts, and is integrally wrapped during installation, the fireproof materials are wrapped on the main cable of the suspension bridge from bottom to top, and the wrapping butt joint is arranged on the backfire surface, such as the top or obliquely above the principle lane, and internode splicing is performed along the direction of the main cable. The insulating layer 5 may be fixed by wire winding or bonded using a high temperature glue.
The cable clamp 1 is connected to 6 one ends of main cable winding, and main cable fire prevention twines a packet structure and can extend to cable clamp 1, and cable clamp 1 has girth and straight seam, and the inside refractory fiber that fills earlier of girth and straight seam position of cable clamp 1, then the fire-retardant sealant 2 is scraped to the surface coating, guarantees the sealing performance of junction.
In the work progress, the outside insulating layer 5 of high temperature resistant low coefficient of heat conductivity of installation protection main cable earlier protects the main cable from the conflagration injury, set up fire blocking anti-cutting layer 4 outside insulating layer 5 and protect inside insulating layer 5 again, improve main cable surface anti-cutting performance and shock resistance, make the protective structure of main cable have better intensity, protect inside insulating layer 5 to avoid rolling the destruction when twining chartered plane 9 construction simultaneously, install fire-retardant twining band 3 at last, as shown in fig. 5, use twine band machine 9 to carry out the spiral with fire-retardant twining band 3 according to certain overlap joint proportion and twine the package, after the package is finished, use heating device 8 to carry out the heat pressurization butt fusion to the fire-retardant twining band 3 after twining the package, make fire-retardant twining band 3 form good sealed effect.
Example 2
The embodiment is applied to the engineering project of the West gate bridge, and the standard width of the flame-retardant wrapping tape 3 in the embodiment is L 0 Wrapping distance L between two adjacent wrapping belts 1 The surface of the main cable is uniformly covered with 2 layers of wrapping belts for 48% of wrapping belt width; fire-retardant and cut-resistant layer 4 is composed ofThe 5 layers of materials consist of high impact resistant flame retardant epoxy resin 41, glass fiber cloth, flame retardant epoxy resin 43, high silica glass cloth 42 and high impact resistant flame retardant epoxy resin 41 from inside to outside. Wrapping distance L of flame-retardant wrapping tape 3 1 Matching adjustment can be performed according to the thickness of the fire-retarding and cut-preventing layer 4.
It should be noted that while the embodiments of the present utility model have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made hereto without departing from the principles and spirit of the utility model, the scope of which is defined by the appended claims and their equivalents.
Claims (8)
1. The utility model provides a fire prevention of suspension bridge main rope twines package structure, its characterized in that includes from interior to outside sets gradually at main rope outlying insulating layer, fire-retardant cutting prevention layer and fire-retardant twining area to and set up in cable clamp circumferential weld, straight slit fire-retardant sealant, fire-retardant twining area wraps up fire-retardant cutting prevention layer with the spiral mode of twining, and adjacent two-layer twining area has the partial overlapping.
2. The fire-proof wrapping structure of the main cable of the suspension bridge according to claim 1, wherein the wrapping distance between two adjacent wrapping belts of the fire-proof wrapping belts is 50% -30% of the wrapping bandwidth, so that the surface of the main cable is ensured to be uniformly covered with more than 2 wrapping belts.
3. The fire-proof wrapping structure of the suspension bridge main cable according to claim 1, wherein the fire-proof wrapping belt is of a three-layer composite structure, the inner layer and the outer layer are respectively chlorosulfonated polyethylene rubber, and the middle layer is terylene mesh cloth.
4. The fire-proof wrapping structure of a suspension bridge main cable according to claim 1, wherein the heat insulation layer is installed in an integral wrapping manner, the heat insulation layer is wrapped on the suspension bridge main cable from bottom to top, and a wrapping butt joint is arranged on the top of the main cable or obliquely above a lane.
5. The fire resistant wrapping structure of a main cable of a suspension bridge according to claim 4, wherein the insulation layer is spliced internode along the main cable direction.
6. The fire-proof wrapping structure of the suspension bridge main cable according to claim 1, wherein the fire-retarding and cutting-preventing layer comprises a flame-retardant epoxy resin layer, a high silica glass cloth and a high impact-resistant flame-retardant epoxy resin layer from inside to outside.
7. The fire-resistant wrapping structure of a suspension bridge main cable according to claim 6, wherein hollow glass beads are added in the flame-retardant epoxy resin layer and the high impact-resistant flame-retardant epoxy resin layer.
8. The fire-proof wrapping structure of the suspension bridge main cable according to claim 1, wherein fire-proof fibers are arranged in the cable clip circumferential seams and the straight seams, and fire-proof sealant is arranged on the surface of the fire-proof fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320049637.4U CN219099797U (en) | 2023-01-04 | 2023-01-04 | Fireproof wrapping structure of suspension bridge main cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320049637.4U CN219099797U (en) | 2023-01-04 | 2023-01-04 | Fireproof wrapping structure of suspension bridge main cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219099797U true CN219099797U (en) | 2023-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320049637.4U Active CN219099797U (en) | 2023-01-04 | 2023-01-04 | Fireproof wrapping structure of suspension bridge main cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219099797U (en) |
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2023
- 2023-01-04 CN CN202320049637.4U patent/CN219099797U/en active Active
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