Built-in air duct for air film

Abstract

The utility model provides a kind of for built-in air duct of air film, it is related to air film structure technical field.Built-in air duct includes several connecting components and several air ducts.Connecting component is located in air film inside;Air duct is located in air film inside, and it is connected with air film inner wall by connecting component, air duct is equipped with several through holes along its length direction, through hole is connected air duct inside and air film inside, and the first end of air duct is communicated with outside by being equipped with the first pedestal of air film;Wherein, the second end of air duct is located between the first pedestal and the second pedestal, and the second end is away from the first end, and the second pedestal is opposite to or adjacent to the first pedestal.Built-in air duct is set in the inside of air film by connecting component, avoids air duct scratch loss, facilitates installation, air duct is equipped with several through holes, and it is favorable to improve air exchange efficiency, and three kinds of air duct arrangement are favorable to improve air exchange effect in high layer area in the inside of air film.

Description

Technical Field

[0001] This utility model relates to the field of air membrane structure technology, and in particular to an internal air duct for air membranes, which is applied to scenarios such as air membrane dust removal and smoke exhaust. Background Technology

[0002] For air-supported membrane structures, air ducts are typically required for ventilation to achieve functions such as dust and smoke removal, and cooling within the membrane. In related technologies, the air ducts are installed on the outside of the air-supported membrane, which has the following drawbacks:

[0003] 1. The air duct is easily damaged: Because the outer side of the air membrane is equipped with a cross cable net, the air duct is easily displaced by external forces such as wind and snow load, which interferes with the cross cable net, causing the air duct to be scratched and the air tightness to be reduced.

[0004] 2. Poor air exchange effect in the air duct: Air exchange between the air duct and the air film can only take place through the connection between the two. The air flow is small, and air in some areas inside the air film (such as areas far from the connection, the top area, etc.) does not easily flow into the air duct through the connection.

[0005] 3. Low safety of high-altitude operations: External air ducts require personnel to climb onto the outside of the air membrane to install the air ducts after the air membrane has been inflated and formed, which poses a high operational risk.

[0006] Therefore, there is an urgent need to research a type of air duct that is not easily damaged and has high safety. Utility Model Content

[0007] This invention addresses the shortcomings of existing technologies by providing an internal air duct for an air-supported membrane structure. The air duct is positioned inside the air-supported membrane using a connecting component, preventing damage and facilitating installation. Additionally, the air duct has several through holes, which improves air exchange efficiency. These three air duct arrangement methods enhance air exchange in the middle and upper levels of the air-supported membrane structure and effectively improve the airflow rate within the membrane.

[0008] An embodiment of the first aspect of this utility model provides a built-in air duct for an air-supported membrane structure, the core improvements of which include:

[0009] Several connecting components: The connecting components are located on the inner wall of the air membrane;

[0010] Several air ducts: The air ducts are located inside the air membrane and are connected to the inner wall of the air membrane through connecting components. The air ducts have several through holes along their length (for example, several through holes are evenly arranged on the side wall of the air duct, or arranged around the air duct, etc.). The through holes connect the inside of the air duct and the inside of the air membrane, so that the air inside the air membrane can enter the air duct through the through holes and be discharged to the outside along the air duct. The first end of the air duct is connected to the outside through a first base set on the air membrane (a negative pressure device, valve device, etc. can be set on the first base to connect the air duct to the outside, or the air duct can be directly connected to the outside).

[0011] The air duct is configured as follows:

[0012] The second end of the air duct, which is far from the first end, is located between the first base and the second base. The second end is far from the first end, and the second base is opposite to or adjacent to the first base (furthermore, air ducts are provided on both sides of the central axis of the air film; the second end is provided with an opening that connects to the inside of the air film so that the air in the upper part of the air film can enter the air duct more smoothly).

[0013] And / or the second end extends to the second base (furthermore, both the first end and the second end are in communication with the outside, either directly or through a valve body device, or through a negative pressure device, etc.).

[0014] The built-in air ducts for the air-supported membrane also include the following improvements:

[0015] The air duct can be flexible or rigid.

[0016] 1. For flexible air ducts, the connection relationship between the connecting components and the flexible air duct is as follows:

[0017] The connecting components include a first connector, a second connector, and a third connector.

[0018] The flexible air duct includes a membrane that defines an internal channel allowing airflow. A first side of the flexible air duct is welded to the inner wall of the air membrane. A first connector, in conjunction with a second connector, clamps the second side of the flexible air duct and the air membrane. The second side of the flexible air duct is located opposite the first side. Bolts connect the first and second connectors to form two-sided support areas for the flexible air duct; or both the first and second sides of the flexible air duct are clamped and fixed by the first and second connectors to form two-sided support areas for the flexible air duct.

[0019] The flexible air duct also includes any one or more counterweights, tensioning elements, or supports for tensioning the flexible air duct so that the internal passage of the flexible air duct remains open.

[0020] The counterweight is located in the flexible air duct and is arranged along the length of the flexible air duct; the tensioning member is located in the flexible air duct, with the third end of the tensioning member connected to the first base and the fourth end of the tensioning member connected to the second end of the flexible air duct, or the fourth end of the tensioning member connected to the second base; the support member is located in the flexible air duct and is arranged along the length of the flexible air duct, and the body of the flexible air duct is circumferentially expanded by the support member.

[0021] 2. The connectors include connecting plates and pull straps.

[0022] The flexible air duct includes a membrane that defines an internal channel that allows air to circulate, and a support for tensioning the flexible air duct. The support is located in the flexible air duct and is arranged along the length of the flexible air duct. The body of the flexible air duct is circumferentially expanded by the support. A connecting piece is located on the inner wall of the air membrane, and a pull strap is located on the connecting piece. The pull strap is connected to the support or the membrane of the flexible air duct.

[0023] For rigid air ducts, the connection relationship between the connecting components and flexible air ducts is as follows:

[0024] The connecting components include connecting plates and pull straps.

[0025] The connecting plate is located on the inner wall of the air film, the pull belt is located on the connecting plate, and the rigid air duct is connected to the pull belt.

[0026] 2. Shape of the air duct

[0027] The air duct is designed based on the curvature of the inner wall of the air membrane, and the curvature of the air duct matches the curvature of the inner wall of the air membrane, avoiding large gaps between the air duct and the air membrane, which is conducive to air exchange inside the air membrane.

[0028] By adopting the above technical solution, this utility model achieves the following beneficial effects:

[0029] 1. The air duct is not easily damaged: The air duct is built into the air membrane through the connecting components and will not interfere with the cross cable net.

[0030] 2. Excellent air exchange effect: The built-in air duct has several through holes along its length, which can cover most of the upper part of the air film. Air in the upper part of the air film can easily enter the air duct; air in the lower part of the air film can easily rise with the airflow to the through holes of the air duct and enter the air duct; the setting of the connecting components ensures that there are no gaps or only negligible gaps between the air duct and the air film, and the air flow path is stable.

[0031] 3. Easy installation and high safety: In the above-mentioned methods of air duct installation, the connecting components and air ducts can be pre-installed on the inner wall of the air membrane, and the operation is carried out on the ground. Alternatively, the air duct can be installed later using a lifting device. It is safer and more stable for personnel to climb onto the lifting device (compared to working directly on the air membrane). The installation of the air duct and the base of the air membrane is also more convenient. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the air film and air duct of the first embodiment of this utility model;

[0034] Figure 2 yes Figure 1 A cross-sectional view along the span of the air film;

[0035] Figure 3This is a schematic diagram of a flexible air duct using counterweights in an embodiment of this utility model;

[0036] Figure 4 This is a schematic diagram of an embodiment of the present invention in which a tensioning member is disposed outside the flexible air duct;

[0037] Figure 5 yes Figure 4 A cross-sectional view of the flexible air duct along its width;

[0038] Figure 6 This is a schematic diagram of an embodiment of the present invention in which a tensioning member is installed inside a flexible air duct;

[0039] Figure 7 This is a schematic diagram of a flexible air duct with a support member used in an embodiment of this utility model;

[0040] Figure 8 yes Figure 7 A cross-sectional view of the flexible air duct shown;

[0041] Figure 9 This is a schematic diagram of a connecting assembly using a connecting piece and a pull strap in an embodiment of this utility model;

[0042] Figure 10 This is a schematic diagram of a rigid air duct according to an embodiment of the present utility model;

[0043] Figure 11 This is a schematic diagram of the air film and air duct of the second embodiment of this utility model;

[0044] Figure 12 yes Figure 11 A cross-sectional view along the span of the air film;

[0045] Figure 13 This is a schematic diagram of the air film and air duct of the third embodiment of this utility model;

[0046] Figure 14 yes Figure 13 A cross-sectional view along the span of the air film;

[0047] Figure 15 This is a schematic diagram of the air film and air duct of the fourth embodiment of this utility model;

[0048] Figure 16 yes Figure 15 A cross-sectional view along the span of the air film;

[0049] Figure 17 This is a schematic diagram of the air film and air duct of the fifth embodiment of this utility model;

[0050] Figure 18 yes Figure 17 A cross-sectional view along the span of the air film. Attached Figure Description

[0051] 1. Air film; 11. First base; 12. Second base; 13. Exhaust vent; 14. Filter device; 15. Negative pressure device;

[0052] 2. Air duct; 20. Through hole;

[0053] 21. Counterweight; 22. Tensioning component; 23. Support component;

[0054] 200. Flexible air duct; 201. Pocket-shaped structure;

[0055] 210. Rigid air duct;

[0056] 3. Connecting components; 31. First connector; 32. Second connector; 33. Third connector; 34. Connecting piece; 35. Pull strap. Detailed Implementation

[0057] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] The method of installing air ducts on the outside of the air-supported membrane has drawbacks such as easy damage to the ducts, poor air exchange efficiency, and low safety for high-altitude operations. Therefore, this invention provides a built-in air duct for air-supported membranes, which has the advantages of being less prone to damage, having good air exchange efficiency, and high operational safety, thus solving the technical problems existing in related technologies.

[0059] Example 1

[0060] This embodiment provides an air membrane with built-in air ducts (both ends of the air duct 2 are connected to the base), and the external cable net has been omitted in the attached drawings.

[0061] 1. Air film 1:

[0062] Reference Figure 1 and Figure 2 As shown, the air-supported membrane 1 includes a base and a membrane material. The base is located above the ground, and the membrane material is laid on top of the base. The membrane material and the base together define the internal space. The air-supported membrane 1 expands and takes shape by filling the internal space with air. A cable net is usually laid on the outside of the membrane material. The cable net provides structural support and stability to the air-supported membrane 1, preventing it from undergoing large deformations under external forces (wind, snow load, etc.).

[0063] 2. Air duct 2:

[0064] Reference Figure 1 and Figure 2 As shown, the air duct 2 is located on the inner wall of the membrane material of the air-supported membrane 1. The first end of the air duct 2 is connected to the outside through the first base 11 of the air-supported membrane 1, and the second end of the air duct 2, away from the first end, extends to the second base 12 opposite to the first base 11. Both the first base 11 and the second base 12 are provided with exhaust ports 13. It can be understood that exhaust ports 13 may also be provided only on the first base 11 or the second base 12.

[0065] For air-supported membrane 1 used in highly polluted environments such as mines, a filter device 14 is installed in the exhaust vent 13 to filter the exhaust air; for air-supported membrane 1 used in ordinary environments such as cultural and sports venues and science and technology exhibition halls, a filter device 14 may not be installed in the exhaust vent 13 to increase the air exchange flow rate and thus improve the air exchange efficiency.

[0066] Reference Figure 3 As shown, the air duct 2 has several through holes 20 along its length. The through holes 20 connect the interior of the air duct 2 to the internal space, allowing air from the internal space to flow into the air duct 2 through the through holes 20. The spacing of the through holes 20 is set according to actual needs; the spacing should not be too small, and the number of through holes 20 should not be too large, otherwise it will affect the negative pressure effect inside the air duct 2, resulting in poor ventilation in areas of the air duct 2 that are far from the negative pressure equipment.

[0067] Reference Figure 1 As shown, the air duct 2 is arranged along the length of the air film 1. This design facilitates the rapid exhaust of air from the interior space. The air duct 2 has a wide coverage area within the interior space, allowing air from the top, sides, and middle of the interior space to quickly enter and exit the air duct 2.

[0068] Reference Figure 2 As shown, both the first base 11 and the second base 12 can be equipped with a negative pressure device 15, which is connected to the ventilation duct 2. Air is exhausted to the outside through the negative pressure device 15, creating a negative pressure within the ventilation duct 2. Air from the internal space enters the ventilation duct 2 under pressure and is then exhausted to the outside. The negative pressure device 15 significantly improves air exchange efficiency and can also filter dust, toxic and harmful gases and substances, and perform automatic cleaning. Alternatively, the negative pressure device 15 can be installed only on the first base 11 or the second base 12.

[0069] It is understandable that the first base 11 and the second base 12 can also be equipped with valve devices. By controlling the opening and closing of the valve devices, the connection and isolation between the air duct and the outside world can be achieved. The valve devices can be those found in existing technologies, such as flap valves.

[0070] Reference Figure 3As shown, the air duct 2 is a flexible air duct 200, the main body of which can be a membrane material, airtight cloth, etc. In this embodiment, the flexible air duct 200 includes a membrane that defines an internal channel allowing airflow, and the main body is composed of the membrane. The flexible air duct 200 is provided with a counterweight 21 for tensioning the flexible air duct 200. The counterweight 21 is made of metal or non-metal materials such as iron blocks, aluminum plates, stainless steel plates, and plastic plates. A pocket-shaped structure 201 for installing the counterweight 21 is provided on the outer or inner side of the flexible air duct 200, and the counterweight 21 is disposed within the pocket-shaped structure 201. The counterweight 21 is arranged along the length of the flexible air duct 200 to ensure uniform stress on the entire flexible air duct 200. The flexible air duct 200 is designed based on the curvature of the inner wall of the air membrane 1, and the curvature of the air duct 2 matches the curvature of the inner wall of the air membrane 1 to reduce the gap between the flexible air duct 200 and the inner wall of the air membrane 1.

[0071] In addition, tensioning members 22 or support members 23 can be installed on the flexible air duct 200 to achieve a tensioning effect.

[0072] Reference Figure 4 and Figure 5 As shown, the tensioning member 22 is a rope. The outer side of the flexible air duct 200 is provided with a flanged structure or a pocket-shaped structure 201 for mounting the tensioning member 22. The tensioning member 22 passes through the flanged structure or pocket-shaped structure 201. The third end of the tensioning member 22 is connected to the first base 11, and the fourth end of the tensioning member 22, away from the third end, is connected to the second base 12.

[0073] Reference Figure 6 As shown, the tensioning member 22 can be installed as follows: the tensioning member 22 is inserted into the flexible air duct 200, the third end of the tensioning member 22 is connected to the first base 11, and the fourth end of the tensioning member 22 away from the third end is connected to the second base 12.

[0074] Reference Figure 7 and Figure 8 As shown, the support member 23 is an iron ring, stainless steel ring, plastic ring, etc. The support member 23 is located on the inner side of the flexible air duct 200 and is fixed by the pocket-shaped structure 201 on the flexible air duct 200. Several support members 23 are arranged along the length of the flexible air duct 200, and the body of the flexible air duct 200 is circumferentially expanded by the support members 23 to maintain the air duct 2 in an open state. In some embodiments, the support member 23 is located on the outer side of the flexible air duct 200 and can also be fixed by the pocket-shaped structure 201 on the flexible air duct 200. The arrangement of the support member 23 is the same as described above and will not be repeated here.

[0075] Reference Figure 10As shown, the air duct 2 is a rigid air duct 210, such as a plastic rigid pipe. For the rigid air duct 210, since it can keep its internal channels open, there is no need to install counterweights 21, tensioning components 22, or support components 23. The rigid air duct 210 can be customized to match the curvature of the inner wall of the air film 1. To further reduce costs, multiple sections of plastic rigid pipe can be spliced ​​together to make the shape of the rigid air duct 210 match the curvature of the inner wall of the air film 1 as closely as possible. The rigid air duct 210 has several through holes 20 connecting the internal space of the air film 1 and the internal channels of the rigid air duct 210, and these through holes 20 are arranged along the length of the rigid air duct 210.

[0076] 3. Connection relationship between connecting component 3 and air duct 2:

[0077] Reference Figure 5 and Figure 6 As shown, for the flexible air duct 200 including the counterweight 21 and the tensioning member 22, the connecting assembly 3 includes a first connector 31, a second connector 32, and a third connector 33. The first side of the flexible air duct 200 is welded to the inner wall of the air film 1. The first connector 31, in conjunction with the second connector 32, clamps the second side of the flexible air duct 200 and the air film 1. The second side is located opposite to the first side. The third connector 33 connects the first connector 31 and the second connector 32, so that the flexible air duct 200 forms two-sided support areas. In some embodiments, both the first and second sides of the flexible air duct 200 are clamped and fixed by the first connector 31 and the second connector 32, so that the flexible air duct 200 forms two-sided support areas.

[0078] Reference Figures 7 to 10 For the flexible air duct 200 and rigid air duct 210, which include the support member 23, the connecting assembly 3 includes a connecting piece 34 disposed on the inner wall of the air film 1 and a pull strap 35 disposed on the connecting piece 34, and the rigid air duct 210 is connected to the pull strap 35. Figure 9 As shown, the pull strap 35 is a T-shaped piece, and the connecting piece 34 presses the foot of the T-shaped piece against the inner wall of the air film 1. In some embodiments, multiple connecting pieces 34 may be provided and arranged around the foot of the T-shaped piece.

[0079] It should be noted that both the flexible air duct 200 and the rigid air duct 210 can use the connecting assembly 3, which mainly consists of connecting pieces 34 and tension straps 35. For example, for the flexible air duct 200 including the counterweight 21 and the tensioning member 22, connecting assemblies 3 are provided on both sides of the flexible air duct 200, and the flexible air duct 200 is connected by tension straps 35, thus forming a support area on both sides of the flexible air duct 200.

[0080] Using the connecting assembly 3, which mainly consists of the first connector 31, the second connector 32 and the third connector 33, the flexible air duct 200 is stably connected; using the connecting assembly 3, which mainly consists of the connecting piece 34 and the pull strap 35, the flexible air duct 200 and the rigid air duct 210 are easier to install.

[0081] Example 2

[0082] This embodiment provides an air-supported membrane with an internal air duct (one end of the air duct 2 is connected to the base, and the other end is located between the central axis of the air-supported membrane 1 and the opposite base). The external cable net has been omitted in the attached drawings.

[0083] The difference between Example 2 and Example 1 lies in the arrangement of the air duct 2. The relevant structure of the air duct 2 is the same as that of Example 1, and will not be described again here.

[0084] Reference Figure 11 and Figure 12 As shown, the first end of the air duct 2 is connected to the outside through the first base 11 provided on the air film 1, and the second end of the air duct 2, which is away from the first end, is located between the central axis of the air film 1 and the first base 11. At the same time, both the first end and the second end of the air duct 2 are provided with openings. The opening at the first end is connected to the outside or is connected to the outside through the negative pressure device 15, and the opening at the second end is connected to the internal space of the air film 1 and is located in the upper region.

[0085] This design saves materials, reduces costs and installation difficulty, while also ensuring high air exchange efficiency. For example, air in the upper region of the internal space of the air film 1 flows into the air duct 2 through the opening at the second end, and air in the middle and lower region of the internal space of the air film 1 flows into the air duct 2 through the through hole 20, basically achieving air exchange without dead zones and with high efficiency.

[0086] Example 3

[0087] This embodiment provides an air-supported membrane with an internal air duct (one end of the air duct 2 is connected to the base, and the other end extends to the central axis of the air-supported membrane 1). The external cable net has been omitted in the attached drawings.

[0088] The difference between Example 3 and Example 1 lies in the arrangement of the air duct 2. The relevant structure of the air duct 2 is the same as that of Example 1, and will not be described again here.

[0089] Reference Figure 13 and Figure 14 As shown, the first end of the air duct 2 is connected to the outside through the first base 11 provided on the air film 1, and the second end of the air duct 2 away from the first end extends to the central axis of the air film 1. The air ducts 2 on both sides of the air film 1 are arranged alternately in the span direction. At the same time, both the first end and the second end of the air duct 2 are provided with openings.

[0090] This design further reduces the number of air ducts 2, saves materials, and thus lowers costs, while maintaining high air exchange efficiency. The air ducts 2 are arranged in an alternating pattern, and their coverage area is basically the same as that of the air ducts 2 in Example 1.

[0091] Example 4

[0092] This embodiment provides an air membrane with a built-in air duct (one end of the air duct 2 is connected to the base, and the other end is located between adjacent bases). The external cable net has been omitted in the attached drawings.

[0093] The difference between Example 4 and Example 1 lies in the arrangement of the air duct 2. The relevant structure of the air duct 2 is the same as that of Example 1, and will not be described again here.

[0094] Reference Figure 15 and Figure 16 As shown, the first end of the air duct 2 is located at the first base 11, and the second end of the air duct 2 is located at the second base 12. In this embodiment, the second base 12 is adjacent to the first base 11. The air duct 2 extends obliquely along the inner wall of the air film 1, and the specific arrangement is as follows: Figure 14 This design allows the air duct 2 to cover most of the space inside the air membrane 1, thereby improving the air exchange efficiency within the air membrane 1.

[0095] Example 5

[0096] This embodiment provides an air film with a built-in air duct (one end of the air duct 2 is connected to the base, and the other end is located between opposing bases and extends beyond the central axis of the air film 1). The external cable net has been omitted in the attached drawings.

[0097] The difference between Example 5 and Example 1 lies in the arrangement of the air duct 2. The relevant structure of the air duct 2 is the same as that of Example 1, and will not be described again here.

[0098] Reference Figure 17 and Figure 18 The first end of the air duct 2 is located at the first base 11, and the second end of the air duct 2 is located between the central axis of the air film 1 and the second base 12. In this embodiment, the second base 12 is oriented relative to the first base 11 (i.e., the second base 12 and the first base 11 are symmetrical about the central axis of the air film 1). The air duct 2 is located on one side of the inner wall of the air film 1, and the second end of the air duct 2 extends beyond the central axis of the air film 1.

[0099] It is understood that in some embodiments, the air duct 2 may also be located on both sides of the inner wall of the air film 1, and the second ends of the air duct 2 on both sides exceed the central axis of the air film 1.

[0100] The above description is only a preferred embodiment of this embodiment and is not intended to limit this embodiment. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this embodiment should be included within the protection scope of this embodiment.

Claims

1. A built-in air duct for an air-supported membrane structure, characterized in that, include: A plurality of connecting components (3) are disposed inside the air film (1); A plurality of air ducts (2) are provided inside the air film (1) and connected to the inner wall of the air film (1) through the connecting component (3). The air ducts (2) are provided with a plurality of through holes (20) along their own length direction. The through holes (20) connect the interior of the air ducts (2) and the interior of the air film (1). The first end of the air ducts (2) is connected to the outside through the first base (11) provided on the air film (1). Wherein, the second end of the air duct (2) is located between the first base (11) and the second base (12), the second end is away from the first end, and the second base (12) is opposite to or adjacent to the first base (11); And / or the second end extends to the second base (12).

2. The built-in air duct for an air-supported membrane according to claim 1, characterized in that, The air duct (2) is a flexible air duct (200) or a rigid air duct (210).

3. The built-in air duct for an air-supported membrane according to claim 2, characterized in that, The connecting component (3) includes a first connector (31), a second connector (32), and a third connector (33); The air duct (2) is the flexible air duct (200), which includes a diaphragm defining an internal channel that allows air to circulate. The first side of the flexible air duct (200) is welded to the inner wall of the air film (1). The first connector (31) cooperates with the second connector (32) to clamp the second side of the flexible air duct (200) and the air film (1). The second side is located opposite to the first side. The third connector (33) connects the first connector (31) and the second connector (32) so that the flexible air duct (200) forms a two-sided support area. Alternatively, the first side and the second side of the flexible air duct (200) may be clamped and fixed by the first connector (31) and the second connector (32) so that the flexible air duct (200) forms a two-sided support area.

4. The built-in air duct for an air film according to claim 3, characterized in that, The flexible air duct (200) also includes any one or more of a counterweight (21), a tensioning member (22), or a support member (23) for tensioning the flexible air duct (200) so that the internal channel of the flexible air duct (200) remains open. The counterweight (21) is disposed on the flexible air duct (200) and arranged along the length of the flexible air duct (200); The tensioning member (22) is disposed on the flexible air duct (200), the third end of the tensioning member (22) is connected to the first base (11), and the fourth end of the tensioning member (22) away from the third end is connected to the second end, or the fourth end is connected to the second base (12); The support member (23) is disposed on the flexible air duct (200) and arranged along the length direction of the flexible air duct (200). The body of the flexible air duct (200) is circumferentially supported by the support member (23).

5. The built-in air duct for an air-supported membrane according to claim 2, characterized in that, The connecting component (3) includes a connecting piece (34) disposed on the inner wall of the air film (1) and a pull strap (35) disposed on the connecting piece (34), wherein the flexible air duct (200) or the rigid air duct (210) is connected to the pull strap (35).

6. The built-in air duct for an air film according to claim 5, characterized in that, The air duct (2) is the flexible air duct (200), which includes a diaphragm defining an internal channel that allows air to circulate, and a support member (23) for keeping the internal channel of the flexible air duct (200) open. The support member (23) is disposed in the flexible air duct (200) and arranged along the length of the flexible air duct (200). The body of the flexible air duct (200) is circumferentially stretched by the support member (23), and the pull strap (35) is connected to the support member (23) or the diaphragm of the flexible air duct (200).

7. The built-in air duct for an air-supported membrane according to claim 1, characterized in that, The air duct (2) is set based on the curvature of the inner wall of the air film (1), and the curvature of the air duct (2) matches the curvature of the inner wall of the air film (1).

8. The built-in air duct for an air-supported membrane according to claim 1, characterized in that, in, The second end of the air duct (2) is located between the first base (11) and the second base (12), and the air duct (2) is provided on both sides of the central axis of the air film (1).

9. The built-in air duct for an air film according to claim 8, characterized in that, in, The second end is located between the central axis of the air film (1) and the first base (11), and the second end is provided with an opening that communicates with the interior of the air film (1).

10. The built-in air duct for an air film according to claim 1, characterized in that, in, The second end extends to the second base (12), and both the first end and the second end are in communication with the outside.

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