Air pipe

Abstract

The utility model relates to the technical field of air pipes, in particular to an air pipe which comprises an outer pipe, an inner pipe, a heat insulation assembly, a first flange and a second flange. A gap is preset between the inner pipe and the outer pipe to form a heat insulation cavity, and the heat insulation assembly is arranged in the heat insulation cavity and comprises an aerogel cotton felt layer. The aerogel cotton felt layer has an excellent heat insulation effect, and the aerogel cotton felt layer is arranged between the inner pipe and the outer pipe, so that the heat insulation effect of the pipeline can be effectively improved, heat transfer in the pipeline is reduced, and the temperature of the outer surface of the air pipe is reduced. And the aerogel cotton felt in the aerogel cotton felt layer has the characteristics of light weight and softness, so that the thickness of the aerogel cotton felt layer is smaller, the space utilization rate is higher, the overall weight of the air pipe is reduced, the safety of the air pipe is improved, and the economic cost of the air pipe is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of air ducts, and in particular to an air duct. Background Art

[0002] With the progress and development of society, the state has put forward more specific requirements for the fire resistance of fire-resistant pipes. According to the "Standard for Building Smoke and Exhaust Systems", all fire-resistant pipes must be inspected by nationally recognized testing methods and obtain safety performance inspection reports to clarify the fire resistance integrity and thermal insulation of the pipes while achieving the corresponding fire resistance performance. However, most existing air ducts are made of fireproof boards and fireproof glue, and have poor fire resistance. Utility Model Content

[0003] The present application aims to provide an air duct to improve the problem of poor fire resistance of the air duct.

[0004] In order to solve the above technical problems, a technical solution adopted in the implementation mode of the present application is:

[0005] In the first aspect, an embodiment of the present application provides an air duct, which includes an outer tube, an inner tube, an insulation component, a first flange and a second flange. The outer tube has a first opening and a second opening that are arranged opposite to each other; the inner tube is arranged in the outer tube, and a gap is preset between the inner tube and the outer tube to form an insulation cavity; the inner tube is enclosed to form a channel, one end of the channel is connected to the first opening, and the other end is connected to the second opening; the insulation component is arranged in the insulation cavity, and the insulation component includes an aerogel felt layer; the first flange is connected to the inner tube and the outer tube at the first opening; the second flange is connected to the inner tube and the outer tube at the second opening.

[0006] In some embodiments, the air duct further includes a first sealing member, which is disposed at the first opening and connected between the outer tube and the inner tube.

[0007] In some embodiments, the air duct further includes a second sealing member, which is disposed at the second opening and connected between the outer tube and the inner tube.

[0008] In some embodiments, the thermal insulation assembly further includes an aluminum silicate wool layer, and the aluminum silicate wool layer is disposed between the aerogel wool felt layer and the inner tube.

[0009] In some embodiments, the air duct further includes a first support member, which is disposed in the channel of the inner tube along the radial direction of the inner tube, and both ends of the first support member are connected to the inner wall of the inner tube.

[0010] In some embodiments, a first extension portion is connected to the end of the inner tube facing the first flange, the first extension portion is bent in a direction away from the first opening, and the first extension portion is connected to the outer surface of the first flange.

[0011] In some embodiments, the thermal insulation assembly further includes a fastener, the fastener is passed through the aerogel wool felt layer and the aluminum silicate wool layer, and the fastener is fixedly connected to the inner tube and / or the outer tube.

[0012] In some embodiments, the air duct also includes a first sealing portion, which abuts between the inner tube and the outer tube at the first opening; the air duct also includes a second sealing portion, which abuts between the inner tube and the outer tube at the second opening, and the inner tube, the outer tube, the first sealing portion and the second sealing portion together enclose the insulation cavity.

[0013] In some embodiments, the first covering portion includes a first side wall, a second side wall and a first connecting portion, the first connecting portion is connected between the first side wall and the second side wall; the first side wall abuts against the inner tube, and the second side wall abuts against the outer tube; the second covering portion includes a third side wall, a fourth side wall and a first connecting portion, the first connecting portion is connected between the third side wall and the fourth side wall; the third side wall abuts against the inner tube, and the fourth side wall abuts against the outer tube; one end of the thermal insulation assembly abuts against the first connecting portion, and the other end abuts against the first connecting portion.

[0014] In some embodiments, the inner tube is provided with a first through hole, and the first support member further includes a first nut. The first support member passes through the first through hole and is threadedly connected to the first nut on the outer surface of the inner tube.

[0015] The beneficial effects of this application are:

[0016] Different from the related art, the embodiment of the present application provides an air duct, which includes an outer tube, an inner tube, an insulation component, a first flange and a second flange. A preset gap between the inner tube and the outer tube forms an insulation cavity, and the insulation component is arranged in the insulation cavity, and the insulation component includes an aerogel cotton felt layer. The aerogel cotton felt layer has an excellent insulation effect. The aerogel cotton felt layer is arranged between the inner tube and the outer tube, which can effectively improve the insulation effect of the pipeline, reduce the transfer of heat in the pipeline, and reduce the temperature of the outer surface of the air duct. In addition, the aerogel cotton felt in the aerogel cotton felt layer is light and soft, so that the thickness of the aerogel cotton felt layer is thinner and the space utilization rate is higher, which reduces the overall weight of the air duct and improves the safety and economic cost of the air duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of the structure of some air ducts provided in the embodiments of the present application;

[0018] Figure 2 is an exploded view of some air ducts provided in the embodiments of the present application;

[0019] Figure 3 It is a schematic diagram of the structure of some outer tubes provided in the embodiments of the present application;

[0020] Figure 4 It is a schematic diagram of the structure of some inner tubes provided in the embodiments of the present application;

[0021] Figure 5 is an exploded view of some air ducts provided in the embodiments of the present application;

[0022] Figure 6 This is a schematic diagram of a structure in which some outer tubes and inner tubes are connected, provided in an embodiment of the present application;

[0023] Figure 7 are cross-sectional views of some air ducts provided in the embodiments of the present application;

[0024] Figure 8 It is a cross-sectional view of some air ducts provided in the embodiments of the present application.

[0025] Reference numerals:

[0026] 1000, air duct;

[0027] 10. outer tube; 11. first opening; 12. second opening; 13. first plate body; 14. second plate body; 15. heat insulation cavity;

[0028] 20. inner tube; 21. passage; 22. first through hole;

[0029] 30. thermal insulation component; 31. aerogel wool felt layer; 32. aluminum silicate wool layer; 33. fastener;

[0030] 40. First flange;

[0031] 50. Second flange;

[0032] 60. a first sealing member;

[0033] 70. Second sealing member;

[0034] 80. first support member; 81. first nut;

[0035] 90. first cover portion; 91. first side wall; 92. second side wall; 93. first connection portion;

[0036] 100. Second covering portion; 101. Third side wall; 102. Fourth side wall; 103. Second connecting portion. DETAILED DESCRIPTION

[0037] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0038] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "several" is more than one, unless otherwise clearly and specifically defined.

[0039] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0040] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. In addition, the technical features involved in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

[0041] In the first aspect, the present application embodiment provides a duct 1000, please refer to Figure 1 and Figure 2 The air duct 1000 includes an outer tube 10, an inner tube 20, a heat insulation assembly 30, a first flange 40 and a second flange 50. The inner tube 20 is arranged in the outer tube 10, the heat insulation assembly 30 is arranged between the inner tube 20 and the outer tube 10, and the first flange 40 and the second flange 50 are arranged at both ends of the outer tube 10.

[0042] For the outer tube 10, please refer to Figure 2 and Figure 3, the outer tube 10 is a layer of pipe or protective layer wrapped around the outside of the air duct 1000. The outer tube 10 has a first opening 11 and a second opening 12 arranged opposite to each other, and the inner tube 20 can be placed in the outer tube 10 through the first opening 11 and the second opening 12. The outer tube 10 can provide additional protection for the air duct 1000 and prevent the air duct 1000 from being affected by physical damage, corrosion or other external factors. At the same time, the outer tube 10 can also make the air duct 1000 system look neater and more beautiful. The outer tube 10 can be made of galvanized steel plate, stainless steel plate, aluminum plate or fiberglass. More preferably, the outer tube 10 can be made of galvanized steel plate, which has good corrosion resistance and mechanical strength, and can provide better protection for the air duct 1000. Considering economy and function, the thickness of the outer tube 10 is relatively thin, and the thickness of the outer tube 10 can generally be set between 0.5mm and 1mm. Furthermore, the outer tube 10 further includes a first plate 13 and a second plate 14, which are enclosed to form the outer tube 10. For example, the outer tube 10 can be formed by using an L-shaped air duct 1000 process, where the first plate 13 and the second plate 14 are engaged by a toyo bone and a single side to form the outer tube 10.

[0043] For the inner tube 20, please refer to Figure 2 and Figure 4 , the inner tube 20 is arranged in the outer tube 10, and the inner tube 20 encloses to form a channel 21. The inner tube 20 is the pipeline part inside the air duct 1000 system. The inner tube 20 is the main channel 21 for air circulation and is responsible for conveying air or other gases. The material and structure of the inner tube 20 will vary according to the purpose, requirements and working environment of the air duct 1000. The material of the inner tube 20 can be galvanized steel plate, stainless steel plate, aluminum plate or fiberglass plate. The shape of the inner tube 20 can be circular, rectangular or other special shapes to meet the requirements of different installation spaces and airflows. The thickness of the inner tube 20 is slightly thicker than that of the outer tube 10, and the inner tube 20 has a stronger ability to resist deformation. For example, when the inner tube 20 flows through high-temperature smoke, the thicker inner tube 20 can play a better supporting and protective role, and can ensure the integrity of the thermal insulation assembly 30. Among them, the thickness of the inner tube 20 is generally set between 0.8mm and 1.5mm. One end of the channel 21 of the inner tube 20 is connected to the first opening 11, and the other end is connected to the second opening 12. The channel 21 can be used for smoke discharge, heat dissipation and air circulation. Figure 5 A gap is preset between the inner tube 20 and the outer tube 10 to form an insulation cavity 15. The insulation cavity 15 has the function of heat preservation and insulation, reducing heat transfer. By adding insulation material in the insulation cavity 15, the high temperature resistance time and insulation temperature of the air duct 1000 can be increased.

[0044] For the above-mentioned thermal insulation assembly 30, please refer to Figure 2 , Figure 5 and Figure 6The insulation component 30 is arranged in the insulation cavity 15, and the insulation component 30 includes an aerogel cotton felt layer 31. The thickness of the aerogel cotton felt layer 31 can be 5mm to 15mm. The main material of the aerogel cotton felt layer 31 is aerogel cotton felt. Aerogel cotton felt is a flexible thermal insulation felt with nano-silicon dioxide or metal aerogel as the main body, which is compounded with carbon fiber or ceramic glass fiber wool or pre-oxidized fiber felt through a special process. It is characterized by low thermal conductivity, certain tensile and compressive strength, and is a new type of pipeline thermal insulation material. The density is 150Kg / m 3 Up to 240kg / m 3 , applicable temperature is -200℃ to 1000℃. Thermal conductivity is 0.02W / (m·k) to 0.1W / (m·k). Aerogel cotton felt is soft, easy to cut, low density, inorganic fireproof, overall hydrophobic, green and environmentally friendly. It can replace traditional flexible thermal insulation materials such as glass fiber products, asbestos insulation felt, silicate fiber products, which are not environmentally friendly and have poor thermal insulation performance.

[0045] As a thermal insulation material, the thermal insulation effect of aerogel cotton felt is 2 to 5 times that of traditional thermal insulation materials, and the theoretical service life determined by the Arrhenius experiment is 20 years. As a thermal insulation material for the air duct 1000, the fire protection level of the air duct 1000 reaches the fire protection level of B1 to A. Under the condition of achieving the same thermal insulation effect, compared with traditional materials, the aerogel cotton felt used is lighter, thinner, and has high space utilization. During transportation or installation, the transportation cost of the thermal insulation material, as well as the time and manpower required for installation can be reduced. Aerogel cotton felt is light and easy to cut, and can be adapted to pipes and insulation equipment of different shapes. Since the aerogel cotton felt is hydrophobic as a whole, it can effectively reduce the entry of moisture into the insulation cavity 15 and the channel 21. In addition, the unique three-dimensional network structure of aerogel can reduce the phenomenon that the thermal insulation effect of other thermal insulation materials such as sintering deformation and sedimentation is significantly reduced during long-term high-temperature use. Especially at high temperatures, the above-mentioned performance advantages of aerogel cotton felt are more obvious.

[0046] In some embodiments, please refer to Figure 5 and Figure 6 The heat insulation component 30 further includes an aluminum silicate wool layer 32, which is disposed between the aerogel wool felt layer 31 and the inner tube 20. The thickness of the aluminum silicate wool layer 32 may be 20 mm to 40 mm. In particular, the thickness of the aerogel wool felt layer 31 and the aluminum silicate wool layer 32 in the heat insulation component 30 may be adjusted according to the fire resistance time and temperature of the air duct 1000.

[0047] The main material of the aluminum silicate wool layer 32 is aluminum silicate wool, which is a thermal insulation material made of aluminum silicate fibers, also known as aluminum silicate fiber wool. It usually has the characteristics of high fire resistance, low thermal conductivity, low moisture absorption and earthquake resistance, and is often used for thermal insulation and fire protection in the fields of construction, industry and transportation. Aluminum silicate wool is a non-combustible Class A material with a heat resistance temperature of 900°C to 1800°C and a density of 128kg / m 3 Above, the thermal conductivity at room temperature is 0.035W / (MK), and the hydrophobicity is ≥98%.

[0048] The thermal insulation component 30 includes an aerogel wool felt layer 31 and an aluminum silicate wool layer 32. By combining the aerogel wool felt and the aluminum silicate wool, the overall fireproof performance of the air duct 1000 is further improved. Aluminum silicate wool itself has good fireproof properties. After being combined with the aerogel wool felt, due to the extremely low thermal conductivity of the aerogel wool felt, it can effectively prevent heat transfer, improve thermal insulation performance, and reduce heat energy loss. The thermal insulation component 30 combines the advantages of both. The combined material can be applied to a wider range of temperature and environmental conditions. For example, it can still maintain good fireproof and thermal insulation properties under harsh conditions such as high temperature, corrosion or vibration.

[0049] For the first flange 40, please refer to Figure 2 and Figure 3 , the first flange 40 is connected to the inner tube 20 and the outer tube 10 at the first opening 11. Further, the end of the inner tube 20 facing the first flange 40 is connected with a first extension portion (not shown in the figure), the first extension portion is bent away from the first opening 11, and the first extension portion is connected to the outer surface of the first flange 40. The end surface of the outer tube 10 facing the first opening 11 is directly connected to the inner surface of the first flange 40.

[0050] For the second flange 50, the second flange 50 is formed by automatic punching, corner cutting and automatic welding of L-shaped angle steel. Figure 2 and Figure 3 , illustratively, the second flange 50 is connected to the inner tube 20 and the outer tube 10 at the second opening 12. Further, the end of the inner tube 20 facing the second flange 50 is connected with a second extension portion (not shown in the figure), the second extension portion is bent in a direction away from the second opening 12, and the second extension portion is connected to the outer surface of the second flange 50. The end surface of the outer tube 10 facing the second opening 12 is directly connected to the inner surface of the second flange 50.

[0051] The embodiment of the present application provides an air duct 1000, which includes an outer tube 10, an inner tube 20, an insulation component 30, a first flange 40 and a second flange 50. A preset gap between the inner tube 20 and the outer tube 10 forms an insulation cavity 15, and the insulation component 30 is arranged in the insulation cavity 15. The insulation component 30 includes an aerogel cotton felt layer 31. The aerogel cotton felt layer 31 has an excellent insulation effect. The aerogel cotton felt layer 31 is arranged between the inner tube 20 and the outer tube 10, which can effectively improve the insulation effect of the channel 21, reduce the transfer of heat in the channel 21, and reduce the temperature of the outer surface of the air duct 1000. In addition, the aerogel cotton felt in the aerogel cotton felt layer 31 is light and soft, so that the thickness of the aerogel cotton felt layer 31 is thinner, the space utilization rate is higher, the overall weight of the air duct 1000 is reduced, and the safety and economic cost of the air duct 1000 are improved.

[0052] In some embodiments, please refer to Figure 5 The air duct 1000 further includes a first sealing member 60, which is disposed at the first opening 11 and connected between the outer tube 10 and the inner tube 20. The first sealing member 60 may be inorganic fiber cotton, which is a highly efficient thermal insulation material with a fireproof grade of B1, a certain flame retardancy, and is not easily burned by flames.

[0053] In some embodiments, please refer to Figure 5 The air duct 1000 further includes a second sealing member 70, which is disposed at the second opening 12 and connected between the outer tube 10 and the inner tube 20. The second sealing member 70 may be inorganic fiber cotton.

[0054] In some embodiments, please refer to Figure 6 and Figure 7 The air duct 1000 also includes a first support member 80, which is arranged in the channel 21 of the inner tube 20 along the radial direction of the inner tube 20, and both ends of the first support member 80 are connected to the inner wall of the inner tube 20. Since the molded air duct 1000 is heavy, when multiple sections of the air duct 1000 are connected together and hoisted, the air duct 1000 will be deformed due to gravity. Therefore, it is necessary to increase the first support member 80 to strengthen the strength of the structure of the inner tube 20 and reduce the deformation of the air duct 1000. Further, the inner tube 20 is provided with a first through hole 22, and the first support member 80 also includes a first nut 81. The first support member 80 passes through the first through hole 22 and is threadedly connected to the first nut 81 on the outer surface of the inner tube 20. Similar to the connection method of the first nut 81, the inner tube 20 is also provided with a second through hole arranged opposite to the first through hole 22, and the heights of the first through hole 22 and the second through hole are substantially the same. The first support member 80 also includes a second nut. The first through hole 22 is penetrated at one end of the first support member 80, and the second through hole is penetrated at the other end to be threadedly connected to the outer surface of the inner tube 20 with the second nut.

[0055] In some embodiments, please refer to Figure 8 The heat insulation assembly 30 further includes a fastener 33, which is inserted into the aerogel wool felt layer 31 and the aluminum silicate wool layer 32, and is fixedly connected to the inner tube 20 and / or the outer tube 10. The fastener 33 may be a welding nail.

[0056] In some embodiments, please refer to Figure 6 and Figure 8 The air duct 1000 further includes a first cover portion 90, which is in contact between the inner tube 20 and the outer tube 10 at the first opening 11. The air duct 1000 further includes a second cover portion 100, which is in contact between the inner tube 20 and the outer tube 10 at the second opening 12. The inner tube 20, the outer tube 10, the first cover portion 90 and the second cover portion 100 together enclose a heat insulation cavity 15.

[0057] For further information, please refer to Figure 6 and Figure 8 The first cover part 90 includes a first side wall 91, a second side wall 92 and a first connection part 93, the first connection part 93 is connected between the first side wall 91 and the second side wall 92, the first side wall 91 abuts against the inner tube 20, and the second side wall 92 abuts against the outer tube 10. The second cover part 100 includes a third side wall 101, a fourth side wall 102 and a second connection part 103, the second connection part 103 is connected between the third side wall 101 and the fourth side wall 102, the third side wall 101 abuts against the inner tube 20, and the fourth side wall 102 abuts against the outer tube 10. One end of the heat insulation assembly 30 abuts against the first connection part 93, and the other end abuts against the first connection part 93.

[0058] It should be noted that the preferred embodiments of the utility model are given in the specification and drawings of the utility model, but the utility model can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not used as additional restrictions on the content of the utility model. The purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the utility model; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the utility model.

Claims

1. An air duct, characterized in that: include: An outer tube having a first opening and a second opening arranged opposite to each other; an inner tube, arranged in the outer tube, and a gap is preset between the inner tube and the outer tube to form a heat-insulating cavity; the inner tube is enclosed to form a channel, one end of the channel is communicated with the first opening, and the other end of the channel is communicated with the second opening; A heat insulation component is arranged in the heat insulation cavity, and the heat insulation component includes an aerogel wool felt layer; a first flange connected to the inner tube and the outer tube at the first opening; The second flange is connected to the inner tube and the outer tube at the second opening.

2. The air duct according to claim 1, characterized in that: The air duct further includes a first sealing member, which is disposed at the first opening and connected between the outer tube and the inner tube.

3. The air duct according to claim 1, characterized in that: The air duct further includes a second sealing member, which is disposed at the second opening and connected between the outer tube and the inner tube.

4. The air duct according to claim 1, characterized in that: The thermal insulation component also includes an aluminum silicate wool layer, which is arranged between the aerogel wool felt layer and the inner tube.

5. The air duct according to claim 1, characterized in that: The air duct further includes a first support member, which is arranged in the channel of the inner tube along the radial direction of the inner tube, and both ends of the first support member are connected to the inner wall of the inner tube.

6. The air duct according to claim 1, characterized in that: A first extension portion is connected to the end of the inner tube facing the first flange. The first extension portion is bent in a direction away from the first opening, and the first extension portion is connected to the outer surface of the first flange.

7. The air duct according to claim 4, characterized in that: The thermal insulation component also includes a fastener, which is inserted into the aerogel wool felt layer and the aluminum silicate wool layer, and is fixedly connected to the inner tube and / or the outer tube.

8. The air duct according to claim 5, characterized in that: The air duct further comprises a first sealing portion, wherein the first sealing portion abuts between the inner tube and the outer tube at the first opening; The air duct further includes a second sealing portion, which is abutted between the inner tube and the outer tube at the second opening. The inner tube, the outer tube, the first sealing portion and the second sealing portion are jointly enclosed to form the heat insulation cavity.

9. The air duct according to claim 8, characterized in that: The first sealing portion includes a first side wall, a second side wall and a first connecting portion, wherein the first connecting portion is connected between the first side wall and the second side wall; the first side wall abuts against the inner tube, and the second side wall abuts against the outer tube; The second sealing portion includes a third side wall, a fourth side wall and a first connecting portion, wherein the first connecting portion is connected between the third side wall and the fourth side wall; the third side wall abuts against the inner tube, and the fourth side wall abuts against the outer tube; One end of the heat insulation component abuts against the first connection portion, and the other end abuts against the first connection portion.

10. The air duct according to claim 5, characterized in that: The inner tube is provided with a first through hole, and the first support member further includes a first nut. The first support member passes through the first through hole and is threadedly connected to the first nut on the outer surface of the inner tube.

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