CN220851280U - Composite air pipe - Google Patents
Composite air pipe Download PDFInfo
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- CN220851280U CN220851280U CN202322482272.7U CN202322482272U CN220851280U CN 220851280 U CN220851280 U CN 220851280U CN 202322482272 U CN202322482272 U CN 202322482272U CN 220851280 U CN220851280 U CN 220851280U
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- pipe
- composite
- air duct
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- density layer
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- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims abstract description 12
- 238000009413 insulation Methods 0.000 claims description 25
- 239000012774 insulation material Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 abstract description 9
- 229910000831 Steel Inorganic materials 0.000 description 19
- 239000010959 steel Substances 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- 239000011810 insulating material Substances 0.000 description 8
- 238000004321 preservation Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 230000009970 fire resistant effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002905 metal composite material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 229910003471 inorganic composite material Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
- Duct Arrangements (AREA)
- Thermal Insulation (AREA)
Abstract
The utility model provides a composite air duct, which is characterized in that: the composite air pipe comprises a nonmetal fireproof heat-insulating pipe which is integrally formed and a metal thin-wall pipe which is arranged in the nonmetal fireproof heat-insulating pipe, wherein the outer peripheral surface of the metal thin-wall pipe is closely attached to the inner peripheral surface of the nonmetal fireproof heat-insulating pipe. The composite air duct reduces construction difficulty and cost, greatly lightens weight, saves occupation of building layer height, reduces wind resistance of an air duct and further improves service performance of the air duct.
Description
Technical Field
The utility model relates to the technical field of building heating and ventilation engineering, in particular to a composite air pipe.
Background
In the heating and ventilation engineering, in order to ensure the engineering quality, the nonmetallic air pipe or the composite air pipe meets 15 requirements of appearance, size deviation, shock resistance, fire resistance, combustion performance, specific friction, air leakage per unit area, durability, pipe wall deformation, air pipe strength, concentration of harmful gas released by the air pipe, anti-condensation performance, fiber falling off of the inner wall of the air pipe, air permeability per unit area, mildew resistance, antibacterial performance and the like.
In the prior art, the air duct generally has the following structures and manufacturing methods:
The first air duct structure is shown in figure 1, the main body frame of the air duct is a steel plate air duct 1-1, heat preservation nails (not shown in the figure) and light steel keels 1-2 are welded on the outer peripheral surface of the steel plate air duct 1-1, heat preservation and insulation layer materials 1-3 are wrapped and fixed on the outer peripheral surface of the steel plate air duct 1-1, and hard heat insulation plates are welded on the light steel keels 1-2 to serve as protection structure layers. The disadvantage of this structure is that: the manufacturing process is complex, the required construction process comprises the steps of manufacturing, welding, cutting, cladding, anchoring and the like of a steel plate air duct, and each process requires higher construction precision and quality, so that the air tightness of the air duct can be ensured, the air duct does not fall off, the heat insulation effect is achieved, and the requirement on the operation skill level of workers is high, so that the labor cost is higher; meanwhile, materials and connecting pieces which are required to be used are more than ten, and the material cost is high; the manufacturing process is time-consuming and labor-consuming, and the production efficiency is very low; in addition, the overall wall thickness of the air pipe is larger, generally more than 120mm, and the air pipe occupies larger building space, which is not beneficial to the layer height design of the building; moreover, because the steel plate air duct 1-1 is a main supporting structure, the thickness is larger, usually more than 60mm, the weight per unit length is larger, and in addition, when the air duct is in use, the thicker heat-insulating layer absorbs water, the whole weight of the air duct can be increased suddenly, and when the air duct is serious, the weight is increased by 3-4 times, so that the supporting system is difficult to bear, and even the air duct and the connecting part related to a building collapse is caused.
In addition, the main body frame of the air duct structure is still a steel plate air duct, heat preservation nails are welded on the outer peripheral surface of the steel plate air duct, a lower-density heat preservation and insulation material is adopted on the outer peripheral surface of the steel plate air duct to conduct winding and wrapping, and the heat preservation and insulation layer is bonded with the steel plate air duct through hot melt adhesive. Compared with the air duct with the structure, the manufacturing method of the structure reduces part of working procedures, but also faces the problems of large wall thickness and heavy weight of the air duct of the main steel plate, the whole coating system has large wall thickness after the manufacturing is finished, the occupied building space is large, and the heat preservation and insulation layer is easy to absorb water so as to further improve the weight of the air duct. Moreover, the sealing edge is easy to adhere and is not firm when the heat insulation material is coated, the heat insulation layer is easy to fall off in use, and the air pipe loses the heat insulation property.
When the air duct with the structure is manufactured, firstly, a steel plate and a non-combustible inorganic composite plate with certain strength are compounded into an air duct plate 2-1, then the air duct plate 2-1 is cut and fed, 4 air duct plates 2-1 are assembled into a rectangular air duct, then the four corners of the metal composite air duct are fixed through L-shaped clamping strips 2-2 or F-shaped clamping strips or bent steel plates, and finally, the air duct is assembled and connected through anchor nails 2-3 or automatic screws. Compared with the prior two methods, the metal composite air pipe reduces the thickness of the heat insulation layer, can meet the strength of the air pipe, and also solves the problem of water absorption of the heat insulation layer, but the anchored assembly structure has higher requirements on materials and construction technology, if the precision, flatness and strength of the materials cannot meet the requirements, gaps and warpage can occur during installation, in addition, the construction technology is complex, the four-sided air pipe plate 2-1 needs to be fixed by a clamp in the assembly process, then the constructors use inner and outer clamping strips to assemble and fix by self-tapping screws or rivets, and if the construction is improper, the strength of the air pipe is insufficient. In addition, the structural tightness cannot be guaranteed, even if the sealant is used, the weather resistance is poor, the tightness can be attenuated after the sealant is used for a period of time, the air leakage quantity of the air pipe cannot meet engineering requirements, and a plurality of construction potential safety hazards are increased. In addition, the self-tapping screw and the rivet residue part on the inner wall of the air pipe can also form wind resistance, so that the service performance of the air pipe is affected. The wind pipe with the structure is used as a wind pipe plate with supporting function, the thickness of the steel plate is still larger, the weight of the wind pipe per unit length is also larger, and the wind pipe is not beneficial to transportation, installation and architectural structural design.
Disclosure of utility model
Aiming at the problems of the background technology, the utility model provides a composite air pipe to solve the problems of complex structure, heavy weight, unfavorable architectural structural design, low manufacturing and installation efficiency, unsatisfactory air pipe service performance and higher manufacturing cost of the air pipe in the prior art.
In order to achieve the purpose of the utility model, the utility model provides a composite air pipe, which is creatively characterized in that: the composite air pipe comprises a nonmetal fireproof heat-insulating pipe which is integrally formed and a metal thin-wall pipe which is arranged in the nonmetal fireproof heat-insulating pipe, wherein the outer peripheral surface of the metal thin-wall pipe is closely attached to the inner peripheral surface of the nonmetal fireproof heat-insulating pipe.
As optimization, the pipe wall of the nonmetallic refractory heat insulation pipe comprises 3 structural layers, namely a first high-density layer, a low-density layer and a second high-density layer from inside to outside; the first high-density layer and the second high-density layer are both made of high-density refractory heat insulation materials, and the low-density layer is made of low-density refractory heat insulation materials.
Preferably, the thickness of the first high-density layer is 3mm-10mm, the thickness of the low-density layer is 5mm-70mm, and the thickness of the second high-density layer is 3mm-15mm.
As optimization, the nonmetallic refractory heat insulation pipe is made of medium-density refractory heat insulation materials.
As optimization, the wall thickness of the metal thin-wall pipe is 0.2mm-1.5mm, and the wall thickness of the nonmetal refractory heat insulation pipe is 5mm-80mm.
As optimization, the cross section of the composite air pipe is rectangular.
The method has the following beneficial effects: because the nonmetallic refractory heat-insulating pipe of the composite air pipe is integrally formed, the manufacturing process of the traditional air pipe is simplified, and the formed air pipe can be hoisted only by longitudinally connecting the air pipe with the air pipe on site, so that the site construction process is greatly reduced, and the construction difficulty and cost are reduced; in addition, the integrally formed air duct does not have gaps possibly caused by splicing of the traditional air duct, and the performance guarantee of the air duct on the index of air leakage can be obviously improved; the metal thin-wall pipe of the composite air pipe only plays a role in smoothing the inner wall of the air pipe and meeting the air speed requirement, and is not required to be used for mechanical support, so that the metal thin-wall pipe is only required to be made of a thin (0.2 mm) steel plate, and plays a role in mechanical support of a main body, namely the non-metal refractory heat-insulating pipe, and is made of a medium-density refractory heat-insulating material or a high-density and low-density composite refractory heat-insulating material, so that the thickness is smaller, and compared with a steel plate air flue of the traditional air pipe, the weight is greatly reduced; the thickness of the air pipe is reduced, the overall height of the air pipe is reduced, the occupation of the building layer height is greatly saved, and the design of the building structure is facilitated; besides, the whole composite air pipe does not need an anchoring connecting piece, so that the manufacturing cost is reduced, and the air resistance of the air duct is greatly reduced and the service performance of the air pipe is further improved because the inner wall of the air pipe is free of self-tapping screws or rivet residues.
Drawings
The drawings of the present utility model are described below.
FIG. 1 is a schematic view of a prior art air duct;
FIG. 2 is a schematic view of a prior art air duct;
FIG. 3 is a schematic structural diagram of a first embodiment of the present utility model;
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is a schematic structural diagram of a second embodiment of the present utility model;
Fig. 6 is an enlarged view of section B of fig. 5.
In the figure: 1. a nonmetallic refractory heat-insulating tube; 2. a metal thin-walled tube; 11. a first high density layer; 12. a low density layer; 13. a second high density layer; 1-1, a steel plate air duct; 1-2, light steel keels; 1-3, heat preservation and insulation layer materials; 2-1, an air duct plate; 2-2, L-shaped clamping strips; 2-3, anchoring nails.
Detailed Description
The utility model is further illustrated below with reference to examples.
Embodiment one:
The composite air duct shown in fig. 3 and 4 comprises a nonmetal fireproof heat insulation pipe 1 and a metal thin-wall pipe 2 arranged in the nonmetal fireproof heat insulation pipe 1, wherein the outer peripheral surface of the metal thin-wall pipe 2 is tightly attached to the inner peripheral surface of the nonmetal fireproof heat insulation pipe 1; the wall thickness of the metal thin-wall pipe 2 is 0.2mm-1.5mm; the nonmetallic refractory heat insulation pipe 1 is a pipe wall of a non-homogeneous layer, and the pipe wall comprises a first high-density layer 11, a low-density layer 12 and a second high-density layer 13 from inside to outside; the thickness of the first high-density layer 11 is 3mm-10mm, the thickness of the low-density layer 12 is 5mm-70mm, and the thickness of the second high-density layer 13 is 3mm-15mm. The first high-density layer 11 and the second high-density layer 13 are both made of a high-density refractory heat-insulating material, and the low-density layer 12 is made of a low-density refractory heat-insulating material. The fire-resistant heat-insulating material is a non-combustible inorganic composite material, is a cementing material and is added with a plurality of modified substances, and can meet the requirement of non-combustibility by fiber reinforcement, such as fiber reinforcement cement, calcium silicate material, glass magnesium material and the like, wherein the density rho is less than 1000kg/m 3, 1000kg/m 3≤ρ＜1500kg/m3 is a medium-density fire-resistant heat-insulating material, and rho is more than or equal to 1500kg/m 3 is a high-density fire-resistant heat-insulating material. For mechanical properties, the same is true of 3mm thick structural layers of different densities: the dry bending strength of the low-density layer is greater than 6MPa, the dry bending strength of the medium-density layer is greater than 11MPa, and the dry bending strength of the high-density layer is greater than 20MPa. In the non-homogeneous layer structure, the low-density layer 12 has smaller heat conductivity coefficient, mainly plays a role in heat preservation, the high-density layers 11 and 13 have lower combustion rate, plays a role in improving the fire resistance limit of the pipe wall, and can improve the mechanical support structure strength of the air pipe. The refractory heat insulation pipe with the non-homogeneous layer structure is mainly used for application scenes with higher requirements on the refractory performance and the heat insulation performance, and can greatly improve the heat insulation performance, the refractory integrity and the mechanical strength of the whole pipeline by combining three layers of refractory materials with different densities in order to realize the high requirements on the refractory performance and the heat insulation performance. Wherein, the metal thin-wall tube 2 can be formed by bending and welding a metal plate, and the nonmetal refractory heat insulation tube 1 can be integrally formed by casting. The cross section of the composite air pipe is rectangular, and the composite air pipe can be manufactured into cross section structures with other shapes according to actual needs.
Embodiment two:
as shown in fig. 5 and fig. 6, the rest of the structure of the second embodiment is the same as that of the first embodiment, except that the non-metal refractory heat-insulating tube 1 is a tube wall with a homogeneous layer, and the whole non-metal refractory heat-insulating tube 1 is made of medium density refractory heat-insulating material. The wall thickness of the nonmetallic refractory heat-insulating tube 1 is 5mm-80mm (to be confirmed).
Through test, the composite air pipe provided by the utility model can reach the following performance standards:
Claims (7)
1. A composite air duct, characterized in that: the composite air pipe comprises a nonmetal fireproof heat-insulating pipe which is integrally formed and a metal thin-wall pipe which is arranged in the nonmetal fireproof heat-insulating pipe, wherein the outer peripheral surface of the metal thin-wall pipe is closely attached to the inner peripheral surface of the nonmetal fireproof heat-insulating pipe.
2. The composite ductwork of claim 1, wherein: the pipe wall of the nonmetallic refractory heat insulation pipe comprises 3 structural layers, namely a first high-density layer, a low-density layer and a second high-density layer from inside to outside; the first high-density layer and the second high-density layer are both made of high-density refractory heat insulation materials, and the low-density layer is made of low-density refractory heat insulation materials.
3. The composite ductwork of claim 2, wherein: the thickness of the first high-density layer is 3mm-10mm, the thickness of the low-density layer is 5mm-70mm, and the thickness of the second high-density layer is 3mm-15mm.
4. The composite ductwork of claim 1, wherein: the nonmetallic refractory heat insulation pipe is made of medium-density refractory heat insulation materials.
5. The composite ductwork of claim 1 or 4, wherein: the wall thickness of the metal thin-wall pipe is 0.2mm-1.5mm, and the wall thickness of the nonmetal fireproof heat insulation pipe is 5mm-80mm.
6. The composite ductwork of any of claims 1 to 4, wherein: the cross section of the composite air pipe is rectangular.
7. The composite ductwork of claim 5, wherein: the cross section of the composite air pipe is rectangular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322482272.7U CN220851280U (en) | 2023-09-13 | 2023-09-13 | Composite air pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322482272.7U CN220851280U (en) | 2023-09-13 | 2023-09-13 | Composite air pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220851280U true CN220851280U (en) | 2024-04-26 |
Family
ID=90740698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322482272.7U Active CN220851280U (en) | 2023-09-13 | 2023-09-13 | Composite air pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220851280U (en) |
-
2023
- 2023-09-13 CN CN202322482272.7U patent/CN220851280U/en active Active
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