Main cable gas clamp with fireproof function

Abstract

The utility model relates to a main cable gas clamp with a fireproof function. The main cable gas clamp comprises a gas clamp body and a fireproof layer. The gas clamp body is composed of two split arc-shaped gas clamp shells which can be spliced, and the two arc-shaped gas clamp shells form a cylindrical shell; a gas clamp flange plate is arranged at the splicing part of the arc-shaped gas clamp shell; the fireproof layer is arranged on the inner sides of the two arc-shaped gas clamp shells, a reserved section is reserved at the position, where the two arc-shaped gas clamp shells are spliced, of the fireproof layer, and the fireproof layer is collected between the gas clamp flange plates; the fireproof layer comprises a cementing layer, a fire-resistant heat insulation layer and a sealing protection layer. The fireproof material is internally arranged, and the fireproof plastic fiber felt or aerogel felt material with excellent high temperature resistance is covered in the gas clamp, so that heat can be effectively insulated in a fire environment, and flames are prevented from directly contacting with the main cable at the gas clamp. The main cable gas clamp is simple in structure and easy to operate during construction, overcomes the defect that the traditional main cable gas clamp is lack of effective fireproof measures, and improves the overall fireproof performance of a bridge.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of main cable fire prevention of suspension bridge, especially to a main cable air clamp with fireproof function. BACKGROUND

[0002] The main cable is the main load-bearing component of the suspension bridge, and its performance directly relates to the safety of the whole bridge. Meanwhile, once the main cable is installed, it is difficult to replace it. If the main cable is damaged in a fire, it may cause serious damage or even collapse of the bridge structure, resulting in huge loss of life and property.

[0003] Currently, there is no clear specification for the fire prevention of the main cable of the suspension bridge. The fire prevention research on the main cable related parts mainly focuses on the cable clamp, and there is less research on the air clamp. The air clamp is a factory prefabricated part that can be spliced. During the construction of the main cable of the bridge, two half air clamps are spliced on the main cable through bolts. Currently, in some projects, the air clamp is not treated for fire prevention, or only the surface of the air clamp can be coated or wrapped with fireproof material after installation. The coating type fireproof material is relatively fragile and is more likely to be damaged in a fire, resulting in falling off before it can play a role. In addition, the surface of the air clamp is shaped, and the shape processing of the wrapped fireproof material is difficult. On some large bridges, the main cable is relatively long, and there are many air clamps arranged on it. The positions of these air clamps become weak points for the fire prevention of the whole main cable. SUMMARY

[0004] In view of the problem that the main cable air clamp lacks effective fireproof measures in the prior art, the utility model provides a main cable air clamp with fireproof function, which comprises: an air clamp body and a fireproof layer; the air clamp body is two split arc-shaped air clamp housings that can be spliced, and the two arc-shaped air clamp housings form a cylindrical housing; an air clamp flange plate is arranged at the splicing position of the arc-shaped air clamp housings; the fireproof layer is arranged on the inner side of the two arc-shaped air clamp housings, the fireproof layer has a reserved section at the splicing position of the two arc-shaped air clamp housings, and is collected between the air clamp flange plates; the fireproof layer comprises a cementing layer, a fire-resistant heat insulation layer and a sealing protection layer.

[0005] Further, the arc-shaped air clamp housing is a semicircular housing.

[0006] Further, the two arc-shaped air clamp housings are connected through bolts at the air clamp flange plate, and the gap is filled with fire-retardant sealant.

[0007] Further, the fireproof layer comprises, from the outside to the inside, the cementing layer, the fire-resistant heat insulation layer and the sealing protection layer.

[0008] Further, the cementing layer is a double-sided adhesive.

[0009] Further, the fireproof and heat insulation layer is a plastic fiber felt or aerogel felt; the thickness of the fireproof and heat insulation layer is 3-20 mm.

[0010] Further, the plastic fiber felt is one or more of a composite of glass fiber felt, basalt fiber felt, high silica fiber felt, ceramic fiber felt and quartz felt.

[0011] Further, the aerogel felt is one or more of a composite of glass fiber aerogel felt, basalt fiber aerogel felt, high silica fiber aerogel felt, ceramic fiber aerogel felt and quartz aerogel felt.

[0012] Further, the sealing protection layer is composed of vulcanized rubber sealant and fiber cloth.

[0013] Further, the sealing protection layer is composed of vulcanized rubber sealant, fiber cloth and vulcanized rubber sealant from outside to inside; the vulcanized rubber sealant is made of silane modified (MS) material, and has a fire retardant grade of V0 or V1; the fiber cloth is a bundle-shaped heat insulation special fiber cloth, and is made of basalt fiber unidirectional cloth; the thickness of the sealing protection layer is 2-3 mm.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model discloses a main cable air clamp with fireproof function, which is provided with fireproof material, and provides an effective and easy-to-operate fireproof measure for the main cable air clamp. The air clamp is covered with fireproof plastic fiber felt or aerogel felt material with excellent high-temperature resistance, which can effectively insulate heat in a fire environment and prevent the main cable from being directly contacted by the flame. The utility model has simple structure and is easy to operate during construction, and can make up for the defects of the traditional main cable air clamp, such as lacking effective fireproof measures, and can effectively prolong the service life of the main cable and related components and improve the overall fire resistance of the bridge. DRAWINGS

[0016] Figure 1 Fig. 1 is a structural schematic view of the utility model embodiment 1;

[0017] Figure 2 Fig. 2 is a sectional view of the utility model embodiment 1;

[0018] Figure 3 Fig. 3 is a sectional view of the utility model embodiment 2;

[0019] Figure 4 Fig. 4 is an internal structure schematic view of the air clamp of the utility model embodiment 1;

[0020] In the figure: 1, air clamp body; 11, arc air clamp shell; 12, air clamp flange plate; 13, first arc air clamp shell; 14, second arc air clamp shell; 2, fireproof layer; 3, cementing layer; 4, fire-resistant heat insulation layer; 5, sealing protective layer; 51, vulcanized rubber sealant; 52, fiber cloth. DETAILED DESCRIPTION

[0021] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0022] It should be noted that the terms "upper", "lower", "front", "rear", "top", "bottom" and the like in the specification and claims of the present application and the above-mentioned drawings indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or parts referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. It should be understood that the data thus used can be interchanged under appropriate circumstances in order to implement the embodiments of the present application described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0023] Embodiment 1

[0024] As shown in Figure 1 , Figure 2 and Figure 4 , a main cable air clamp with a fireproof function includes an air clamp body 1 and a fireproof layer 2. The air clamp body 1 is two arc-shaped air clamp shells 11 that can be spliced together, and the two arc-shaped air clamp shells 11 form a cylindrical shell. The arc-shaped air clamp shells 11 are provided with air clamp flange plates 12 at the splicing positions. The fireproof layer 2 is arranged on the inner side of the two arc-shaped air clamp shells 11, and the fireproof layer 2 has a reserved section at the splicing position of the two arc-shaped air clamp shells 11 and is collected between the air clamp flange plates 12. The fireproof layer 2 includes a cementing layer 3, a fire-resistant heat insulation layer 4 and a sealing protective layer 5.

[0025] The arc-shaped air clamp shell 11 and the air clamp flange plate 12 are integrally formed. In this embodiment, the arc-shaped air clamp shell 11 is a semicircular shell. The two arc-shaped air clamp shells 11 are connected by bolts at the air clamp flange plates 12, and the gaps are filled with fire-retardant sealant, which effectively prevents the flame from entering the air clamp through the gap at the splicing position of the air clamp flange plate 12.

[0026] Generally, the fireproof layer 2 consists of an adhesive layer 3, a fire-resistant and heat-insulating layer 4, and a sealing and protective layer 5, arranged from the outside to the inside. The fire-resistant and heat-insulating layer 4 is fixed to the inside of the arc-shaped air clamp shell 11 by the adhesive layer 3, and the sealing and protective layer 5 can prevent the dry air of the dehumidification system in the air clamp from affecting the aerogel felt.

[0027] The adhesive layer 3 is a double-sided adhesive, such as PET double-sided tape. This fixing method is simple and reliable, and can effectively prevent the fire-resistant insulation layer from slipping on the gas clamp.

[0028] The fire-resistant insulation layer 4 is made of shaped fiber felt or aerogel felt, with a thickness of 3–20 mm. For projects with special protection requirements, the fire-resistant insulation layer 4 can be made into multiple layers as appropriate.

[0029] Shaped fiber mat is one or more composites of glass fiber mat, basalt fiber mat, high silica fiber mat, ceramic fiber mat, and quartz mat. Fiber mat is a sheet material made of fibrous materials. Refractory fiber mat has excellent high-temperature resistance and thermal insulation properties, and its low heat capacity is beneficial for controlling temperature changes, thus having important application value in high-temperature environments.

[0030] Aerogel felt is one or more composites of glass fiber aerogel felt, basalt aerogel felt, high-silica oxygen aerogel felt, ceramic fiber aerogel felt, and quartz aerogel felt. Aerogel has extremely low thermal conductivity and excellent high-temperature resistance, which can effectively insulate against heat in fire environments and prevent flames from directly contacting the main cable.

[0031] The sealing and protective layer 5 is composed of a cross-layered composite of vulcanized rubber sealant 51 and fiber cloth 52. The overlapping arrangement of vulcanized rubber sealant 51 and fiber cloth 52 ensures that the sealing and protective layer 5 is more uniform and has better protective performance.

[0032] In a preferred embodiment, such as Figure 4 As shown, the sealing and protective layer 5, from the outside to the inside, consists of a vulcanized rubber sealant 51, a fiber cloth 52, and another vulcanized rubber sealant 51. The vulcanized rubber sealant 51 is made of silane-modified (MS) material with a flame retardant rating of V0 or V1; the fiber cloth 52 is a bundled heat-insulating special fiber cloth, made of basalt fiber unidirectional cloth. The thickness of the sealing and protective layer is 2-3 mm.

[0033] This utility model is a prefabricated product, and the main manufacturing process is as follows:

[0034] Step 1: Produce the air clamp body 1;

[0035] Step 2: Fix the shaped aerogel felt used for the fire-resistant and heat-insulating layer 4 to the air clamp body 1 through the adhesive layer 3 on the inner side of the arc-shaped air clamp shell 11;

[0036] Step 3: filling and smoothing the vulcanized rubber sealant 51 outside the fireproof and heat insulation layer 4, wrapping a layer of fiber cloth 52, and scraping a layer of vulcanized rubber sealant 51 to complete the preparation of the sealing and protection layer 5.

[0037] In the construction of the main cable of the suspension bridge, only the two arc-shaped air clamp housings 11 need to be spliced on site at the air clamp flange plates, and no additional fireproof treatment is needed outside the air clamp body 1. The utility model has the advantages of simple structure, easy operation during construction, and makes up for the defects of the lack of effective fireproof measures at the traditional main cable air clamp, and fills in the short board of the main cable fireproofing, which can effectively prolong the service life of the main cable and its related components, and improve the overall fire resistance of the bridge.

[0038] Example 2

[0039] The air clamp body 1 in the embodiment is composed of a first arc-shaped air clamp housing 13 with a large surface area and a second arc-shaped air clamp housing 14 with a small surface area. In actual installation, the first arc-shaped air clamp housing 13 is placed on the upper side, and the second arc-shaped air clamp housing 14 is placed on the lower side. By moving the position of the air clamp flange plate 12 downward, especially at a high place from the ground, the installation and maintenance of the air clamp are more convenient.

[0040] The above is only the preferred embodiment of the utility model, and does not limit the scope of the utility model. It should be noted that for ordinary technicians in the technical field, without departing from the technical principles of the utility model, a number of improvements and modifications can be made, which should be covered within the protection scope of the utility model.

Claims

1. A main cable air clamp having a fireproof function, characterized by, The utility model relates to a kind of air clamp, including: Air clamp body (1) and fireproof layer (2); The air clamp body (1) is two split arc air clamp housings (11), and two arc air clamp housings (11) form a cylindrical housing;The arc air clamp housings (11) are provided with air clamp flange plate (12) at the joint;The fireproof layer (2) is arranged in the two arc air clamp housings (11), and the fireproof layer (2) is left with a reserved section at the joint of the two arc air clamp housings (11), and is collected between the air clamp flange plate (12);The fireproof layer (2) includes cementing layer (3), fire-resistant insulation layer (4) and sealing protective layer (5).

2. The main cable air clamp with a fireproof function according to claim 1, characterized in that, The arc air clamp housing (11) is a semicircular housing.

3. The gas clamp with fireproof function for main cable according to claim 1, characterized in that, Two arc air clamp housings (11) are connected by bolts at air clamp flange plate (12), and filled with fire-retardant sealant in the gap.

4. The gas clamp with fireproof function for main cable according to claim 1, characterized in that, The fireproof layer (2) is sequentially the cementing layer (3), the fire-resistant insulation layer (4) and the sealing protective layer (5) from outside to inside.

5. The gas clamp with fireproof function for main cable according to claim 1, characterized in that, The cementing layer (3) is double-sided adhesive.

6. The gas clamp with fireproof function for main cable according to claim 1, characterized in that, The fire-resistant insulation layer (4) is a shaped fiber felt or aerogel felt;The thickness of the fire-resistant insulation layer is 3-20mm.

7. The gas clamp with fireproof function for main cable according to claim 6, characterized in that, The shaped fiber felt is one or more of glass fiber felt, basalt fiber felt, high-silica fiber felt, ceramic fiber felt and quartz felt.

8. The main cable air clamp with a fireproof function according to claim 6, characterized in that, The aerogel felt is one or more of glass fiber aerogel felt, basalt aerogel felt, high-silica aerogel felt, ceramic fiber aerogel felt and quartz aerogel felt.

9. The gas clamp with a fireproof function for a main cable according to claim 1, characterized in that, The sealing protective layer (5) is composed of vulcanized rubber sealant (51) and fiber cloth (52) by cross-laminated composite.

10. The gas clamp with a fireproof function for a main cable according to claim 9, characterized in that, The sealing protective layer (5) is sequentially vulcanized rubber sealant (51), fiber cloth (52) and vulcanized rubber sealant (51) from outside to inside;The vulcanized rubber sealant (51) is made of silane modified (MS) material, and the fire-retardant grade is V0 or V1;The fiber cloth (52) is a bundle-shaped heat-insulating special fiber cloth, and is made of basalt fiber unidirectional cloth;The thickness of the sealing protective layer is 2-3mm.

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