Bridge cable fireproof structure based on winding type aerogel fireproof belt

Abstract

The utility model discloses a bridge cable fireproof structure based on a winding type aerogel fireproof belt. The bridge cable fireproof structure comprises the aerogel fireproof belt, a sheath and a fluorocarbon winding belt. The surface of the aerogel fireproof belt is sleeved with the sheath; the fluorocarbon wrapping tape is wound on the surface of the sheath; a double-layer aerogel felt is arranged in the aerogel fireproof belt and comprises an inner-layer aerogel felt and an outer-layer aerogel felt, the inner-layer aerogel felt and the outer-layer aerogel felt are arranged in a staggered mode, and the two side faces of the connecting position of the inner-layer aerogel felt and the outer-layer aerogel felt are L-shaped table tops of the same specification. The double-layer aerogel felt is arranged in the aerogel fireproof belt, and the two side faces of the connecting position of the aerogel fireproof belt and the double-layer aerogel felt are L-shaped table tops of the same specification. During winding, the L-shaped table boards are overlapped and overlapped to form overlapping sealing, so that the problem that a thermal bridge is generated at the position of a butt joint due to seam splicing when a fire disaster occurs is avoided, and a bridge cable structure is effectively protected.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model belongs to bridge cable fire prevention technical field, more particularly, relate to a kind of bridge cable fire prevention structure based on winding aerogel fireproof belt. BACKGROUND

[0002] Cable-supported bridge mainly includes suspension bridge and cable-stayed bridge, and is the strongest bridge structure form in current crossing capacity, and cable-supported bridge form is often selected when natural conditions such as river, canyon need to be crossed.The main cable and suspender of suspension bridge, the cable-stayed cable of cable-stayed bridge are important components for transmitting internal force of bridge, and the main body is high-strength steel wire, which has the risk of gradually losing mechanical properties and reducing structural safety reserve in high-temperature environment above 300 DEG C.The fire caused by traffic accident on cable-supported bridge seriously threatens the safety of cable structure, and in order to improve the structural safety, cable-supported bridge needs to be provided with cable fire prevention protection system.

[0003] Common bridge cable fire prevention system wraps heat insulation layer and fire-retardant layer outside cable, and there is a kind of bridge fire-retardant wrapping belt on the market, which comprises a framework layer, characterized in that: the upper surface of the framework layer is compounded with a fire-retardant rubber layer, the lower surface of the framework layer is compounded with a hypalon rubber layer, a plurality of plug-in counterbores are arranged on the left half of the upper surface of the fire-retardant rubber layer, a plurality of plug-in columns are arranged vertically downward on the right half of the lower surface of the hypalon rubber layer; the width of the fire-retardant rubber layer is greater than the width of the hypalon rubber layer, and the part of the fire-retardant rubber layer wider than the hypalon rubber layer is folded downward and attached beside the hypalon rubber layer, and the lower bottom surface of the hypalon rubber layer is compounded with a glue layer.

[0004] The above bridge fire-retardant wrapping belt sets fire-retardant rubber layer and hypalon rubber layer on framework layer, and the two are bonded together to form heat insulation layer, which can play a certain fireproof role to a certain extent.However, using this device, in order to ensure the heat insulation capacity, several millimeters of thickness are needed, which affects the aerodynamic shape of cable;And fireproof material needs to be fixed by fire-resistant structural adhesive on site, which is more wet operation, and has the problems of complex installation and poor performance.Therefore, a kind of bridge cable fire prevention structure based on winding aerogel fireproof belt is needed, which improves the fireproof performance of cable, while ensuring the convenience of installation and waterproof performance. UTILITY MODEL CONTENTS

[0005] In view of the above defects or improvement needs of the prior art, the utility model provides a kind of bridge cable fireproof structure based on winding aerogel fireproof belt, better heat insulation is provided by the aerogel fireproof belt, the performance of wear resistance and impact resistance is improved by using sheath to protect aerogel fireproof belt, and the weather resistance and chemical corrosion resistance of fireproof structure are further improved by using fluorocarbon wrapping belt.In the aerogel fireproof belt, double-layer aerogel felt is arranged, and the two side surfaces at the connection of the two are L-shaped platforms with the same specifications.In winding, the L-shaped platforms overlap and lap, forming a lap seal, which avoids the problem of heat bridge at the butt joint position due to the joint gap when fire occurs, effectively protecting the bridge cable structure.

[0006] To achieve the above object, the utility model embodiment provides a kind of bridge cable fireproof structure based on winding aerogel fireproof belt, including aerogel fireproof belt, sheath and fluorocarbon wrapping belt;

[0007] The sheath is sleeved on the surface of the aerogel fireproof belt;

[0008] The fluorocarbon wrapping belt is wound on the surface of the sheath;

[0009] Double-layer aerogel felt is arranged in the aerogel fireproof belt, including inner layer aerogel felt and outer layer aerogel felt, the inner layer aerogel felt and outer layer aerogel felt are staggered and arranged between, and the two side surfaces at the connection of the two are L-shaped platforms with the same specifications.

[0010] Further, the inner layer aerogel felt and outer layer aerogel felt are staggered and arranged towards the width direction thereof, the midlines of the two along the length direction are kept parallel, and the splicing surfaces of the two are tightly attached.

[0011] Further, the aerogel fireproof belt further includes first butyl tape and glass fiber cloth.

[0012] Further, the glass fiber cloth is wrapped on the outer surfaces of the inner layer aerogel felt and outer layer aerogel felt, and completely covers the leakage parts of the two aerogel felts.

[0013] Further, the first butyl tape is arranged on the glass fiber cloth of the bottom surface of the inner layer aerogel felt.

[0014] Further, the inner layer aerogel felt and outer layer aerogel felt are further connected by sewing thread, which is arranged on both sides of the overlapping part of the inner layer aerogel felt and outer layer aerogel felt, and sews the two together along the length direction.

[0015] Further, the fluorocarbon wrapping belt includes base material, adhesive layer and reinforcing layer.

[0016] Further, the base material is fluoropolymer fiber, which is attached to the sheath through the adhesive layer;

[0017] The reinforcing layer is made of reinforcing material including glass fiber.

[0018] Further, a second butyl tape is arranged at the end of the fluorocarbon wrapping tape.

[0019] Further, the second butyl tape is mixed with sealant to form a sealing structure at the connection between the fluorocarbon wrapping tape and the bridge cable.

[0020] Overall, the above technical solutions conceived by the present application can achieve the following beneficial effects compared with the prior art:

[0021] 1. The bridge cable fireproof structure based on the wrapped aerogel fireproof tape can provide better heat insulation performance through the aerogel fireproof tape, protect the aerogel fireproof tape with a sheath to improve its wear resistance and impact resistance, and further improve the weather resistance and chemical corrosion resistance of the fireproof structure through the fluorocarbon wrapping tape. Double-layer aerogel felt is arranged in the aerogel fireproof tape, and the two sides of the connection between the two are L-shaped platforms with the same specifications. During wrapping, the L-shaped platforms overlap and lap, forming a lap seal to avoid the problem of heat bridge at the butt joint position due to the joint gap when a fire occurs, effectively protecting the bridge cable structure.

[0022] 2. The bridge cable fireproof structure based on the wrapped aerogel fireproof tape can improve the strength and stability of the whole structure by reinforcing the inner and outer aerogel felts with glass fiber cloth, and can prevent external rainwater from corroding the bridge cable by bonding and fixing the aerogel fireproof tape on the bridge cable with the first butyl tape while providing waterproof function.

[0023] 3. The bridge cable fireproof structure based on the wrapped aerogel fireproof tape can provide extrusion force to the aerogel fireproof tape through the sheath, provide additional mechanical support, increase its stability, prevent it from falling off due to long-term exposure to air, and affect the fireproof performance of the fireproof structure. The sheath is wrapped on the surface of the aerogel fireproof tape to prevent direct contact between the flame and the internal structure, thereby enhancing the fireproof performance.

[0024] 4. The bridge cable fireproof structure based on the wrapped aerogel fireproof tape uses the second butyl tape and sealant in combination to form a sealing structure to transition to the part of the bridge cable that is not wrapped with the fireproof structure, thereby avoiding the performance reduction of the internal structure of the fireproof structure due to water ingress, and ensuring the fireproof performance of the fireproof structure. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is an installation cross-sectional view of the bridge cable fireproof structure based on the wrapped aerogel fireproof tape.

[0026] Figure 2 Figure 1 is a cross-sectional view of an aerogel fireproof belt according to an embodiment of the present application;

[0027] Figure 3 Figure 2 is a storage schematic view of the aerogel fireproof belt according to an embodiment of the present application;

[0028] Figure 4 Figure 3 is an installation schematic view of the aerogel fireproof belt according to an embodiment of the present application;

[0029] Figure 5 Figure 4 is a schematic view of a part a of the aerogel fireproof belt according to an embodiment of the present application; Figure 4 Figure 5 is an enlarged view of a part b of the aerogel fireproof belt according to an embodiment of the present application.

[0030] Figure 6 Figure 6 is a schematic view of a part c of the aerogel fireproof belt according to an embodiment of the present application. Figure 4 In all the drawings, the same reference signs indicate the same technical features, specifically: 1-aerogel fireproof belt, 101-first butyl tape, 102-inner layer aerogel felt, 103-outer layer aerogel felt, 104-glass fiber cloth, 105-stitching thread, 2-sheath, 3-fluorocarbon wrapping tape, 4-second butyl tape.

[0031] DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as there is no conflict.

[0033] As Figure 1 ​As shown in the utility model embodiment provides a kind of bridge cable fireproof structure based on winding aerogel fireproof belt, including aerogel fireproof belt 1, sheath 2 and fluorocarbon wrapping tape 3.Wherein, the aerogel fireproof belt 1 is wound on the HDPE sheath of bridge cable structure outer layer, the sheath 2 is covered on the surface of aerogel fireproof belt 1, and the fluorocarbon wrapping tape 3 is wound on the surface of the sheath 2.By the aerogel fireproof belt 1, better heat insulation performance is provided, the sheath 2 is used to protect aerogel fireproof belt 1, improve its wear resistance and impact resistance, and the fluorocarbon wrapping tape 3 is used to further improve the weather resistance and chemical corrosion resistance of fireproof structure.The aerogel fireproof belt 1 is provided with double-layer aerogel felt, including inner layer aerogel felt 102 and outer layer aerogel felt 103, the inner layer aerogel felt 102 and the outer layer aerogel felt 103 are misaligned and arranged between, so that the two sides of the connecting portion of the two are L-shaped mesa of the same specification.In winding, the L-shaped mesa is overlapped and lapped, to form lap seal, to avoid the problem of heat bridge at the position of butt joint due to joint gap when fire occurs, effectively protecting the bridge cable structure.

[0034] As Figure 2 As shown, the inner layer aerogel felt 102 and the outer layer aerogel felt 103 are misaligned and arranged in the width direction thereof, and the midlines of the two in the length direction are kept parallel, and the two are tightly fitted between the splicing surfaces.

[0035] The aerogel fireproof belt 1 further includes a first butyl tape 101 and a glass fiber cloth 104, wherein the glass fiber cloth 104 is wrapped on the outer surfaces of the inner layer aerogel felt 102 and the outer layer aerogel felt 103, and completely covers the leakage portions of the two aerogel felts. The first butyl tape 101 is arranged on the glass fiber cloth 104 on the bottom surface of the inner layer aerogel felt 102. In use, the first butyl tape 101 tightly connects the aerogel fireproof belt 1 and the HDPE sheath. The glass fiber cloth 104 enhances the protection of the inner layer aerogel felt 102 and the outer layer aerogel felt 103, improves the strength and stability of the whole, and the first butyl tape 101 adhesively fixes the aerogel fireproof belt 1 on the bridge cable, while providing a waterproof effect to prevent external rainwater from corroding the bridge cable.

[0036] The inner layer aerogel felt 102 and the outer layer aerogel felt 103 are further connected by a sewing thread 105 arranged on both sides of the overlapping portion of the inner layer aerogel felt 102 and the outer layer aerogel felt 103, and the two are sewn together along the length direction, to avoid lateral sliding of the connection between the two aerogel felts.

[0037] Preferably, the misaligned L-shaped lap joint of the inner layer aerogel felt 102 and the outer layer aerogel felt 103 has a width of 25 mm.

[0038] As Figure 3As shown, preferably, the aerogel fireproof belt 1 is stored in a roll shape after being manufactured, which is convenient for subsequent transportation and use.

[0039] As shown in the drawings, Figure 4 , 5 As shown, the sheath 2 is sleeved on the surface of the aerogel fireproof belt 1 after the aerogel fireproof belt 1 is wound on the bridge cable. The sheath 2 provides extrusion force to the aerogel fireproof belt 1, provides additional mechanical support, increases the stability, prevents shedding due to long-term exposure to air, and affects the fireproof performance of the fireproof structure. And the sheath 2 is wrapped on the surface of the aerogel fireproof belt 1, preventing the flame from directly contacting the internal structure, thereby enhancing the fireproof performance.

[0040] Preferably, the sheath 2 is a stainless steel sheath or a half pipe.

[0041] The fluorocarbon wrapping belt 3 includes a substrate, an adhesive layer, and a reinforcing layer. The substrate is a fluorine-containing polymer fiber, which is provided with adhesion by the adhesive layer to adhere to the sheath 2. The reinforcing layer is made of reinforcing materials including glass fibers to provide support to the fluorocarbon wrapping belt 3 to enhance its mechanical strength. The weather resistance and chemical corrosion resistance of the fireproof structure are further enhanced by the fluorocarbon wrapping belt 3.

[0042] As shown in the drawings, Figure 6 The aerogel fireproof belt 1, the sheath 2 and the second butyl tape 4 are only arranged on the lower half of the bridge cable, so that a section exists at the top of the structure. The section cannot be self-sealed because it is on the bridge cable, and a sealing structure is needed to seal the section to prevent rainwater from entering the gap between the aerogel fireproof belt 1, the sheath 2 and the second butyl tape 4. To solve the above problem, the bridge cable fireproof structure of the embodiment of the utility model further comprises a second butyl tape 4, which is arranged at the end of the fluorocarbon wrapping belt 3 and is used to form a sealing structure between the fluorocarbon wrapping belt 3 and the connection between the bridge cable. The second butyl tape 4 is mixed with sealant to form a sealing structure to transition to the part of the bridge cable that is not wrapped with the fireproof structure, so as to avoid the performance of the internal structure of the fireproof structure being reduced due to water entering, thereby ensuring the fireproof performance of the fireproof structure.

[0043] In use, the aerogel fireproof belt 1 is first wound on the surface of the bridge cable in a spiral manner, and the L-shaped overlapping steps on the adjacent two turns of the aerogel fireproof belt 1 are overlapped to form an overlapping seal; then the sheath 2 is sleeved on the surface of the wound aerogel fireproof belt 1, and the sheath 2 is locked to extrude the aerogel fireproof belt 1 to enhance the strength thereof; then the fluorocarbon wrapping belt 3 is wound on the surface of the sheath 2 to adhere to the entire surface of the sheath 2, and the wrapping can be repeated for multiple layers as needed; finally, the second butyl tape 4 and the sealant are used to transitionally connect the surface of the bridge cable at the section to complete the closure of the section.

[0044] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bridge cable fireproof structure based on a wound aerogel fireproof belt, characterized in that, The aero-gel fireproof belt (1), the sheath (2) and the fluorocarbon wrapping belt (3) are included. The sheath (2) is sleeved on the surface of the aero-gel fireproof belt (1). The fluorocarbon wrapping belt (3) is wound on the surface of the sheath (2). The aero-gel fireproof belt (1) is provided with double-layer aero-gel felt, including inner-layer aero-gel felt (102) and outer-layer aero-gel felt (103), the inner-layer aero-gel felt (102) and the outer-layer aero-gel felt (103) are staggered and arranged between the inner-layer aero-gel felt (102) and the outer-layer aero-gel felt (103), so that the two sides of the connecting part of the two are L-shaped table surfaces with the same specifications.

2. The bridge cable fireproof structure based on the winding aerogel fireproof belt according to claim 1, characterized in that, The inner-layer aero-gel felt (102) and the outer-layer aero-gel felt (103) are staggered and arranged towards the width direction, the middle lines of the two along the length direction are kept parallel, and the splicing surfaces of the two are tightly fitted.

3. The bridge cable fireproof structure based on the winding aerogel fireproof belt according to claim 2, characterized in that, The aero-gel fireproof belt (1) further includes a first butyl tape (101) and a glass fiber cloth (104).

4. The bridge cable fireproof structure based on the winding aerogel fireproof belt according to claim 3, characterized in that, The glass fiber cloth (104) is wrapped on the outer surfaces of the inner-layer aero-gel felt (102) and the outer-layer aero-gel felt (103), and completely covers the leakage parts of the two aero-gel felts.

5. The bridge cable fireproof structure based on the winding aerogel fireproof belt according to claim 4, characterized in that, The first butyl tape (101) is arranged on the glass fiber cloth (104) of the bottom surface of the inner-layer aero-gel felt (102).

6. A bridge cable fireproof structure based on the wound aerogel fireproof belt according to any one of claims 1-5, characterized in that, The inner-layer aero-gel felt (102) and the outer-layer aero-gel felt (103) are further connected through sewing thread (105), which is arranged on both sides of the overlapping part of the inner-layer aero-gel felt (102) and the outer-layer aero-gel felt (103), and sews the two together along the length direction.

7. A bridge cable fireproof structure based on the wound aerogel fireproof belt according to any one of claims 1-5, characterized in that, The fluorocarbon wrapping belt (3) includes a base material, an adhesive layer and a reinforcing layer.

8. The bridge cable fireproof structure based on the winding aerogel fireproof belt according to claim 7, characterized in that, The base material is a fluoropolymer fiber, which is attached to the sheath (2) through the adhesive layer; The reinforcing layer is glass fiber.

9. A bridge cable fireproof structure based on the wound aerogel fireproof belt according to any one of claims 1-5, characterized in that, A second butyl tape (4) is further included, which is arranged at the end of the fluorocarbon wrapping belt (3).

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