CN117569376A - Flexible heat insulation sleeve for embedded part of steel shell immersed tube tunnel and manufacturing method of flexible heat insulation sleeve - Google Patents
Flexible heat insulation sleeve for embedded part of steel shell immersed tube tunnel and manufacturing method of flexible heat insulation sleeve Download PDFInfo
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- CN117569376A CN117569376A CN202410051230.4A CN202410051230A CN117569376A CN 117569376 A CN117569376 A CN 117569376A CN 202410051230 A CN202410051230 A CN 202410051230A CN 117569376 A CN117569376 A CN 117569376A
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- main body
- inner container
- heat insulation
- steel shell
- immersed tube
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- 238000009413 insulation Methods 0.000 title claims abstract description 50
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 43
- 239000010959 steel Substances 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 110
- 239000000835 fiber Substances 0.000 claims abstract description 55
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 55
- 239000002131 composite material Substances 0.000 claims abstract description 44
- 239000004964 aerogel Substances 0.000 claims abstract description 35
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003063 flame retardant Substances 0.000 claims abstract description 22
- 239000004744 fabric Substances 0.000 claims abstract description 20
- 239000003292 glue Substances 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000000903 blocking effect Effects 0.000 claims abstract 2
- 238000007789 sealing Methods 0.000 claims description 8
- 238000013329 compounding Methods 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 239000012774 insulation material Substances 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000004114 Ammonium polyphosphate Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 235000019826 ammonium polyphosphate Nutrition 0.000 description 1
- 229920001276 ammonium polyphosphate Polymers 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- CYQAYERJWZKYML-UHFFFAOYSA-N phosphorus pentasulfide Chemical compound S1P(S2)(=S)SP3(=S)SP1(=S)SP2(=S)S3 CYQAYERJWZKYML-UHFFFAOYSA-N 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/063—Tunnels submerged into, or built in, open water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Thermal Insulation (AREA)
Abstract
The invention relates to a flexible heat insulation sleeve for a steel shell immersed tube tunnel embedded part, which comprises a main body and an inner container, wherein the main body is made of a flexible fireproof heat insulation material, the main body is a first cavity with an open top, the four side surfaces and the bottom surface are used for forming a second cavity with an open top, the main body and the inner container are not contacted with each other, a plurality of through holes for bolts to pass through are arranged on the main body and the inner container in a penetrating way, and a limiting part is arranged between the through holes matched with the main body and the inner container, so that the distance between the flexible main body and the inner container is kept after the installation, and the first cavity becomes an isolated space for better blocking inward heat transmission. The main body is sequentially provided with the high silica fiber composite aerogel felt, the flame-retardant composite glue and the high silica fiber woven cloth from inside to outside, has a simple structure and is convenient to install, the embedded plate inside the steel shell immersed tube tunnel can be effectively protected, and the structural damage of the steel shell immersed tube tunnel caused by the heat bridge effect generated by heating is avoided.
Description
Technical Field
The invention relates to the technical field of steel shell immersed tube tunnel fire prevention, in particular to a steel shell immersed tube tunnel embedded part flexible heat insulation sleeve and a manufacturing method thereof.
Background
The steel shell immersed tube tunnel technology is one of the main technologies of the current tunnel construction, and an embedded part is arranged during the construction of the steel shell immersed tube tunnel and is used for installing supporting facilities such as cameras, street lamps, indication boards and the like. Because of the special structure of the tunnel, the space is relatively smaller, if a fire disaster occurs, fire disaster rescue is affected by the geographical position and traffic flow conditions, the steel shell immersed tube tunnel is internally embedded with plates, and the key part of the connecting plate is easily heated to generate a thermal bridge effect to cause the damage of the steel shell immersed tube tunnel structure, so that immeasurable loss is caused. Moreover, the steel shell immersed tube tunnel embedded part has the ageing problem, can be corroded by gases such as automobile exhaust, and is extremely difficult to replace, and protective measures are needed.
At present, a protection technology for the embedded part of the steel shell immersed tube tunnel is not found, and the protection technology is a problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a flexible heat insulation sleeve for a steel shell immersed tube tunnel embedded part, which solves the problem that the steel shell immersed tube tunnel embedded part is not protected against fire and ageing in the prior art.
In order to achieve the above purpose, the invention provides a flexible heat insulation sleeve for a steel shell immersed tube tunnel embedded part, which comprises the following components: the flexible fireproof heat-insulating material comprises a main body and an inner container, wherein the main body comprises four side surfaces and a bottom surface to form a first cavity with an open top, the inner container comprises four side surfaces and a bottom surface to form a second cavity with an open top, the main body and the inner container are not contacted with each other, a plurality of first through holes for bolts to pass through are symmetrically formed in the side surfaces of two long sides of the main body, a second through hole matched with the first through hole is formed in the inner container in a penetrating mode, and a limiting piece is arranged between each pair of the first through holes and the second through holes so that the distance between the flexible main body and the inner container is kept after the inner container is installed, and the first cavity becomes an isolated space to better block heat from being transmitted inwards.
Preferably, the main body is made of a composite material, and is sequentially provided with a high silica fiber composite aerogel felt, flame-retardant composite glue and a high silica fiber woven cloth from inside to outside, and the liner is formed by the high silica fiber composite aerogel felt.
Preferably, the distance between the main body and each adjacent surface of the liner is 2-6mm.
Preferably, the embedded part is directly wrapped by the inner container.
Preferably, the heat-resistant and flame-retardant liner further comprises an intumescent flame retardant arranged in the first cavity and attached to the liner.
Preferably, the intumescent flame retardant comprises epoxy resin and flame retardant in a proportion of 100:10-20.
Preferably, the sealing device further comprises a sealing piece, wherein the sealing piece is arranged at the top of the main body and the inner container and covers a gap between the main body and the inner container.
Preferably, a tubular heat insulation strip is further arranged between the two symmetrical limiting parts, and the heat insulation strip is made of high silica fiber composite aerogel and used for wrapping bolts arranged on the embedded parts of the steel shell immersed tube tunnel and preventing the bolts from transferring heat to the embedded parts of the steel shell immersed tube tunnel.
Preferably, the thickness of the high silica fiber composite aerogel felt is 5-20mm, and the thickness of the high silica fiber woven cloth is 2-5mm.
The invention also provides a manufacturing method of the flexible heat insulation sleeve of the steel shell immersed tube tunnel embedded part, wherein the main body of the heat insulation sleeve and the material of the inner container are of an integrated plane structure, and the heat insulation sleeve is folded into a three-dimensional structure after being engraved and molded, and the manufacturing method comprises the following steps:
s1: compounding the high silica fiber composite aerogel raw material into a high silica fiber composite aerogel felt through a compounding machine;
s2: engraving the product obtained in the step S1 on an engraving machine;
s3: carving the high silica fiber woven cloth on a carving machine;
s4: and assembling the carved high silica fiber woven cloth and the high silica fiber composite aerogel felt.
Preferably, the carving in step S2 includes carving V-shaped grooves at the connection part between each two adjacent surfaces, wherein the open angle of each V-shaped groove is 90 ° and the connection part of the non-connected surfaces is carved with 45 ° inclined plane, so that the compactness of the folded joint is ensured.
Compared with the prior art, the invention has the beneficial effects that:
1. the structure is simple, the integrity of the material is ensured by the engraving process, and the possibility that flame and heat enter the heat insulation sleeve along the butt joint is reduced by the butt joint.
2. The flexible material is more favorable for installation, and the inconvenience in installation caused by errors of the position of the through hole in the heat insulation sleeve main body and the position of the through hole in the steel shell immersed tube tunnel embedded part can be eliminated.
3. Install the locating part between insulating sheath main part and the inner bag, make first cavity become an isolated space, block heat inward transmission better, form an outer fire prevention heat insulation on the whole, the intermediate level prevents heat transfer, the triple protective structure of inner layer heat insulation.
4. When the heat insulation sleeve main body is damaged, the intumescent flame retardant rapidly expands and carbonizes when meeting fire to form a new fireproof protection layer, and the protection of the second form is provided.
Drawings
FIG. 1 is a schematic view of a usage state structure of the present invention;
FIG. 2 is a schematic diagram of the structure of a main material according to the present invention;
FIG. 3 is a schematic side view of the present disclosure;
FIG. 4 is a schematic structural diagram of embodiment 2 of the present invention;
FIG. 5 is a graph of test temperature for an embodiment of the present invention;
FIG. 6 is a schematic flow chart of a method for manufacturing a heat insulating sleeve according to an embodiment of the invention;
FIG. 7 is a schematic diagram of an engraved structure of a high silica fiber composite aerogel blanket according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of the comparative experimental control insulation jacket set of example 1 of the present invention.
The meaning of each reference sign in the figure is:
1. a main body; 11. high silica fiber composite aerogel blanket; 12. flame-retardant composite glue; 13. high silica fiber woven cloth; 2. a first chamber; 3. A first through hole; 4. a limiting piece; 5. an intumescent flame retardant; 6. a heat insulating strip; 7. an inner container; 8. a second chamber; 9. a second through hole; 10. a seal; 15. a V-shaped groove; 16. an inclined plane; 17 embedded parts.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The invention provides a flexible heat insulation sleeve for a steel shell immersed tube tunnel embedded part, referring to fig. 1-3, the flexible heat insulation sleeve comprises a main body 1 and an inner container 7 which are made of fireproof heat insulation materials, the whole flexible heat insulation sleeve is in a cuboid shape, the main body 1 is formed by four side surfaces and a bottom surface to form a first cavity 2 with an open top, the inner container 7 is formed by four side surfaces and the bottom surface to form a second cavity 8 with the open top, the main body 1 and the inner container 7 are not contacted with each other, the inner container 7 is used for wrapping an embedded part 17, the volume of the inner container 7 is smaller than the volume of the first cavity 2, namely, the periphery of the inner container 7 is not contacted with the main body 1, the distance between the adjacent side surfaces of the main body 1 and the inner container 7 is 2-6mm, a sealing part 10 is fixedly arranged at the top of the main body 1 and the inner container 7 to cover a gap between the main body 1 and the inner container 7, and the sealing part 10 also plays a role of fixing the relative distance between the main body 1 and the inner container 7. In reality, because the fire source comes from ground, the direct fire of insulating sheath bears the face as the bottom, so in this embodiment inner bag 7 bottom surface and the distance of main part 1 bottom surface be 5-10mm, the transfer of heat is further slowed down to bigger distance.
The two long side sides of the main body 1 are symmetrically provided with a plurality of first through holes 3 for bolts to pass through, the inner container 7 is provided with second through holes 9 matched with the first through holes 3 in a penetrating way, the number of the through holes is matched with the number of the bolts on the embedded part 17, and the number of the through holes is 2 or 3, or a plurality of the through holes are horizontally arranged. Because the first through hole 3 and the second through hole 9 are positioned at the same horizontal height, the bolt plays a limiting role on the main body 1 and the liner 7 after being installed, so that the bottoms of the two parts keep a certain distance.
Because the inner container 7 contacts with the embedded part 17, certain heat conduction exists, in order to better separate heat conduction, an annular limiting part 4 is arranged between each pair of the first through holes 3 and the second through holes 9, the thickness of the limiting part 4 is 2-6mm, the inner ring of the limiting part can be penetrated by bolts, the flexible main body 1 can deform in the installation process, the limiting part 4 has the function of keeping a distance between the flexible main body and the inner container after the installation, the first cavity 2 is changed into an isolated space, heat is better blocked from being transmitted inwards, and a fireproof heat insulation structure is integrally formed, heat transfer is prevented, and a triple heat insulation protection structure is further added.
Further, a tubular heat insulation strip 6 is further arranged between the two symmetrical limiting parts 4, and the heat insulation strip is made of high silica fiber composite aerogel and is used for wrapping bolts arranged on the steel shell immersed tube tunnel embedded part 17, and heat is transferred to the steel shell immersed tube tunnel embedded part 17 after the bolts are blocked from being heated.
In this embodiment, the main body 1 is a composite material, and the three materials are sequentially, from inside to outside, a high silica fiber composite aerogel felt 11, a flame retardant composite glue 12 and a high silica fiber woven cloth 13, and are compounded by a compounding machine to form a multi-layer plate structure, wherein the thickness of the high silica fiber composite aerogel felt 11 is 5-20mm, the thickness of the high silica fiber woven cloth 13 is 2-5mm, the high silica fiber composite aerogel felt 11 provides a fireproof heat insulation function, the high silica fiber woven cloth 13 provides a forming function and a function of not being disassembled at high temperature, and meanwhile provides a basic reinforced framework for a product, so that the high silica fiber composite aerogel felt 11 has higher mechanical strength, and the dimensional stability and durability of the product in the use process are ensured. The inner container 7 is composed of high silica fiber composite aerogel felt.
It should be noted that the fire-resistant requirements for steel shell immersed tube tunnels in the GB/T26784-2011 standard of building element fire-resistant test alternative and additional test procedures are: under the temperature rising curve of RABT-ZTV of tunnel fire, the temperature of any temperature measuring point is not more than 300 ℃ within 120 minutes of the temperature rising and constant temperature stage of the inner wall of the steel shell immersed tube.
The product manufactured according to the technical scheme of the embodiment performs performance detection according to the requirements of GB/T26784-2011, a comparison group is arranged in the detection, the product structure of the comparison group is shown in fig. 8, the fireproof heat insulation sleeve is only composed of a main body 1, an inner liner 7 and a sealing piece 10 are removed, the thickness of a high silica fiber composite aerogel felt 11 in the main body 1 is 20mm, the distance between each adjacent side surface of an embedded part 17 and the main body 1 is 2mm, the distance between each adjacent side surface of the embedded part and the bottom surface of the main body 1 is 5mm, and an annular limiting piece 4 with the thickness of 2mm is arranged between each pair of first through holes 3 and the embedded part 17; the thickness of the high silica fiber composite aerogel felt 11 in the main body 1 of the test product is 15mm, the thickness of the inner container 7 is 3mm, the distance between each adjacent side surface of the main body 1 and the inner container 7 is 4mm, the distance between the bottom surface of the inner container 7 and the bottom surface of the main body 1 is 10mm, and an annular limiting part 4 with the thickness of 4mm is arranged between each pair of the first through holes 3 and the second through holes 9. The detection result is shown in fig. 5, the highest temperature curve A of the temperature measuring point inside the test piece (i.e. the embedded part 17) is the test result of the comparison group, and the highest temperature of the embedded part 17 of the steel shell immersed tube tunnel is 278 ℃ in 120 minutes; the highest temperature curve B of the temperature measuring point inside the test piece (i.e. the embedded part 17) is the test result of the test sample of the embodiment 1 of the invention, the highest temperature of the embedded part 17 of the steel shell immersed tube tunnel is 240 ℃ in 120 minutes, and the fireproof and heat insulation effects are obviously higher than those of the control group. Experiments prove that the flexible heat insulation sleeve of the embedded part of the steel shell immersed tube tunnel meets the requirements of GB/T26784-2011, has an outstanding effect, and can completely solve the problems of fire prevention and heat insulation of the embedded part of the steel shell immersed tube tunnel.
Example 2
Based on embodiment 1, the present invention further proposes an improvement, referring to fig. 4, in this embodiment, the thickness of the high silica fiber composite aerogel felt 11 in the main body 1 is 8mm, the thickness of the high silica fiber woven cloth 13 is 2mm, the thickness of the inner container 7 is 3mm, the distance between each adjacent side surface of the main body 1 and the inner container 7 is 6mm, the distance between the bottom surface of the inner container 7 and the bottom surface of the main body 1 is 8mm, an annular limiting member 4 is installed between each pair of the first through hole 3 and the second through hole 9, and the thickness of the limiting member 4 is 6mm. The first chamber 2 between the main body 1 and the inner container 7 is filled with an intumescent flame retardant (5), and the intumescent flame retardant (5) is attached to the inner container 7 and does not contact with the inner side of the main body 1. The formula of the intumescent flame retardant (5) is epoxy resin and flame retardant, and the proportion is 100:10-20, wherein the flame retardant comprises the following components in weight: 3 parts of ammonium polyphosphate and 1 part of pentaerythritol; 1 part of urea; 2 parts of melamine formaldehyde; 1 part of phosphorus pentasulfide; 0.5 part of talc.
When the heat insulation sleeve is used, when the duration of a fire disaster is long, or explosion occurs on site, the main body (1) structure of the heat insulation sleeve is damaged, the expansion type flame retardant (5) can be quickly expanded and carbonized when encountering the fire, a compact fire barrier is provided, the heat conductivity coefficient and heat convection are reduced, and the embedded part 17 can be protected in a second form.
Example 3
The invention provides a manufacturing method of a steel shell immersed tube tunnel embedded part flexible heat insulation sleeve, referring to fig. 3, 6 and 7 in detail, a heat insulation sleeve main body (1) is made of a high silica fiber composite aerogel felt (11) and a high silica fiber woven cloth (13), an inner container (7) is made of a high silica fiber composite aerogel felt, and is of an integrated planar structure, and is folded into a three-dimensional structure after being engraved and molded, and the manufacturing method mainly comprises the following steps:
firstly, compounding high silica fiber composite aerogel raw materials into a high silica fiber composite aerogel felt (11) through a compounding machine;
and then, carving the high silica fiber composite aerogel felt (11) according to the designed shape and size by a carving machine, wherein the carving comprises a through hole for carving the bolt to pass through, a V-shaped groove (15) and a 45-degree inclined surface (16).
Specifically, a V-shaped groove (15) is engraved at the joint between each two adjacent faces, and the opening angle of the V-shaped groove (15) is 90 degrees, so that the two connected faces are mutually perpendicular after being folded, and tight thread joint is achieved. The connecting part of the non-connecting surfaces is engraved with a 45-degree inclined plane (16), and a 90-degree angle is formed between the non-connecting surfaces and the 45-degree inclined plane, so that the compactness of the folded butt joint is ensured.
Secondly, the high silica fiber woven cloth (13) is also engraved to a shape and size matched with the engraved high silica fiber composite aerogel felt (11).
Finally, the high silica fiber composite aerogel felt (11) is folded into a box shape, and is wrapped by the engraved high silica fiber woven cloth (13) in order to prevent the high silica fiber composite aerogel felt from scattering, and the high silica fiber woven cloth (13) and the box shape are fixed by flame-retardant composite glue (12), so that the high silica fiber woven cloth (13) has better high temperature resistance, can not be damaged at high temperature, can keep the specific shape of the heat insulation sleeve not to scatter, and flame and heat can not enter the heat insulation sleeve along the butt joint seam. The high silica fiber woven cloth (13) and the high silica fiber composite aerogel felt (11) can be further fixed by using a sewing technology.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (11)
1. A steel shell immersed tube tunnel embedded part flexible heat insulation sleeve, comprising: the novel fireproof heat-insulating material is characterized in that the main body (1) and the inner container (7) are formed by flexible fireproof heat-insulating materials, the main body (1) is a first cavity (2) with an open top formed by four side surfaces and a bottom surface, the inner container (7) is a second cavity (8) with an open top formed by four side surfaces and the bottom surface, the novel fireproof heat-insulating material is characterized in that the main body (1) and the inner container (7) are not contacted with each other, a plurality of first through holes (3) for bolts to pass through are symmetrically formed in two long side surfaces of the main body (1), second through holes (9) matched with the first through holes (3) are formed in the inner container (7) in a penetrating mode, and a limiting piece (4) is arranged between each first through hole (3) and each second through hole (9) so that a distance is kept between the flexible main body (1) and the inner container (7) after the novel fireproof heat-insulating material is installed, and the first cavity (2) becomes an isolated space, and heat is blocked from being transmitted inwards well.
2. The flexible heat insulation sleeve for the steel shell immersed tube tunnel embedded part is characterized in that the main body (1) is made of a composite material, a high silica fiber composite aerogel felt (11), flame-retardant composite glue (12) and a high silica fiber woven cloth (13) are sequentially arranged from inside to outside, and the inner container (7) is formed by the high silica fiber composite aerogel felt.
3. A steel shell immersed tube tunnel embedded part flexible heat insulation sleeve as claimed in claim 2, wherein the distance between the main body (1) and each adjacent surface of the inner container (7) is 2-6mm.
4. A steel shell immersed tube tunnel embedded part flexible heat insulation sleeve as claimed in claim 2, wherein the inner container (7) directly wraps the embedded part (17).
5. A steel shell submerged pipe tunnel embedment flexible insulation sleeve according to any of claims 1-4, further comprising an intumescent flame retardant (5), the intumescent flame retardant (5) being disposed in the first chamber (2).
6. The flexible heat insulation sleeve for the steel shell immersed tube tunnel embedded part, as set forth in claim 5, wherein the formula of the intumescent flame retardant (5) is epoxy resin and flame retardant, and the proportion is 100:10-20.
7. The flexible heat insulation sleeve for the steel shell immersed tube tunnel embedded part, as set forth in claim 6, further comprising a sealing member (10), wherein the sealing member (10) is disposed at the top of the main body (1) and the inner container (7) and covers a gap between the main body (1) and the inner container (7).
8. The flexible heat insulation sleeve for the steel shell immersed tube tunnel embedded part according to claim 7, wherein a tubular heat insulation strip (6) is further arranged between the two symmetrical limiting parts (4), the heat insulation strip is made of high silica fiber composite aerogel and is used for wrapping bolts arranged on the steel shell immersed tube tunnel embedded part (17) and blocking the bolts to transfer heat to the steel shell immersed tube tunnel embedded part (17).
9. A steel shell immersed tube tunnel embedment flexible insulation sleeve as defined in any one of claims 2 to 4, wherein the thickness of the high silica fiber composite aerogel blanket (11) is 5 to 20mm and the thickness of the high silica fiber woven cloth (13) is 2 to 5mm.
10. The manufacturing method of the flexible heat insulation sleeve of the steel shell immersed tunnel embedded part is characterized in that the main body (1) and the inner container (7) are of an integrated plane structure, and are folded into a three-dimensional structure after being engraved and molded, and the manufacturing method comprises the following steps:
s1: compounding the high silica fiber composite aerogel raw material into a high silica fiber composite aerogel felt through a compounding machine;
s2: engraving the product obtained in the step S1 on an engraving machine;
s3: carving the high silica fiber woven cloth on a carving machine;
s4: and assembling the carved high silica fiber woven cloth and the high silica fiber composite aerogel felt.
11. The method for manufacturing the flexible heat insulation sleeve for the steel shell immersed tube tunnel embedded part according to claim 10, wherein the carving in the step S2 comprises carving V-shaped grooves at the connection part between each two adjacent surfaces, the opening angle of the V-shaped grooves is 90 degrees, and 45-degree inclined surfaces are carved at the connection part of the non-adjacent surfaces, so that the compactness of the joint after folding is ensured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410051230.4A CN117569376A (en) | 2024-01-15 | 2024-01-15 | Flexible heat insulation sleeve for embedded part of steel shell immersed tube tunnel and manufacturing method of flexible heat insulation sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410051230.4A CN117569376A (en) | 2024-01-15 | 2024-01-15 | Flexible heat insulation sleeve for embedded part of steel shell immersed tube tunnel and manufacturing method of flexible heat insulation sleeve |
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| CN117569376A true CN117569376A (en) | 2024-02-20 |
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| CN202410051230.4A Pending CN117569376A (en) | 2024-01-15 | 2024-01-15 | Flexible heat insulation sleeve for embedded part of steel shell immersed tube tunnel and manufacturing method of flexible heat insulation sleeve |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5798154A (en) * | 1995-12-13 | 1998-08-25 | Bryan; Lauri | Flex wrapped vacuum insulator |
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